/* ============================================================
   Step-Wise Refusal Dynamics — project page
   Design system: ported 1:1 from research.decart.ai (Decart Research,
   Figma "Decart Research" tokens). Fonts, colours, spacing, radii and the
   article/home components mirror that site so the page reads as Decart.
   ============================================================ */

/* ---------- Roobert (body/UI) ---------- */
@font-face { font-family: 'Roobert'; src: url('../assets/fonts/Roobert-Light.woff2') format('woff2'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'Roobert'; src: url('../assets/fonts/Roobert-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Roobert'; src: url('../assets/fonts/Roobert-Medium.woff2') format('woff2'); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: 'Roobert'; src: url('../assets/fonts/Roobert-SemiBold.woff2') format('woff2'); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: 'Roobert'; src: url('../assets/fonts/Roobert-Bold.woff2') format('woff2'); font-weight: 700; font-style: normal; font-display: swap; }

/* ---------- Season (display) — variable font, Mix instances ---------- */
@font-face { font-family: 'Season VF'; src: url('../assets/fonts/SeasonCollectionVF-TRIAL.woff2') format('woff2-variations'); font-weight: 300 900; font-style: normal; font-display: swap; }
@font-face { font-family: 'Season Mix'; src: url('../assets/fonts/SeasonMix-Regular.woff2') format('woff2'); font-weight: 300 499; font-style: normal; font-display: swap; }
@font-face { font-family: 'Season Mix'; src: url('../assets/fonts/SeasonMix-RegularItalic.woff2') format('woff2'); font-weight: 300 499; font-style: italic; font-display: swap; }
@font-face { font-family: 'Season Mix'; src: url('../assets/fonts/SeasonMix-Medium.woff2') format('woff2'); font-weight: 500 649; font-style: normal; font-display: swap; }
@font-face { font-family: 'Season Mix'; src: url('../assets/fonts/SeasonMix-SemiBold.woff2') format('woff2'); font-weight: 650 900; font-style: normal; font-display: swap; }

:root {
  /* ---- Primitives: neutral (Decart) ---- */
  --neutral-0: #FFFFFF;
  --neutral-50: #FEFEFB;
  --neutral-100: #ECECEC;
  --surface-panel: #F2F2F2;
  --neutral-150: #F3F3F3;
  --neutral-200: #E3E3E3;
  --neutral-300: #C5C5C5;
  --neutral-400: #9A9A9A;
  --neutral-500: #6A6A6A;
  --neutral-600: #4D565F;
  --neutral-700: #3B3733;
  --neutral-800: #313131;
  --neutral-850: #21222C;
  --neutral-900: #33302B;
  --neutral-950: #000000;
  --ink-rgb: 51, 48, 43;

  /* ---- Primitives: brand (Decart) ---- */
  --brand-blue: #2548F6;
  --brand-navy: #00044C;
  --brand-warm: #FAF7EE;

  /* ---- Semantic ---- */
  --bg-primary: var(--neutral-50);
  --bg-secondary: var(--neutral-100);
  --bg-tertiary: var(--neutral-150);
  --text-primary: var(--neutral-900);
  --text-secondary: var(--neutral-600);
  --text-tertiary: var(--neutral-500);
  --text-muted: var(--neutral-400);
  --text-heading: var(--neutral-800);
  --accent-primary: var(--brand-blue);
  --accent-deep: var(--brand-navy);
  --accent-article: #3D5ECA;
  --border-default: var(--neutral-200);
  --border-subtle: var(--neutral-300);
  --surface-card: var(--neutral-0);

  /* ---- Status (hero simulator; always paired with a text label) ---- */
  --harmful: #D93B3B;
  --harmful-soft: rgba(217, 59, 59, 0.10);
  --revising: #B8770E;
  --revising-soft: rgba(217, 142, 4, 0.14);
  --safe: #1F9D55;
  --safe-soft: rgba(31, 157, 85, 0.12);

  /* ---- Chart series (validated: ΔE ≥ 23 under protan/deutan, ≥ 5:1 contrast) ---- */
  --series-diffusion: var(--brand-blue);
  --series-ar: #6A6A6A;
  --series-track: #E3E3E3;

  /* ---- Spacing ---- */
  --space-2xs: 4px; --space-xs: 8px; --space-sm: 12px; --space-md: 16px; --space-lg: 20px;
  --space-xl: 24px; --space-2xl: 32px; --space-3xl: 48px; --space-4xl: 64px; --space-5xl: 80px; --space-6xl: 120px;

  /* ---- Radius ---- */
  --radius-sm: 4px; --radius-md: 24px; --radius-lg: 32px; --radius-full: 100px;

  /* ---- Type ---- */
  --font-display: 'Season VF', 'Season Mix', 'Roobert', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Roobert', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', Menlo, monospace;
  --w-mix-regular: 420;
  --w-mix-medium: 580;
  --tscale: 1.15;
  --rail-scale: 0.9;
  --article-measure: 754px;

  /* ---- Layout ---- */
  --content-w: 1312px;
  --page-w: 1440px;
  --gutter: 64px;
  --nav-bg: #FFFEFB;
  --divider: rgba(0, 0, 0, 0.15);
  --nav-link: #696969;
  --paper-texture: url('../assets/img/paper-texture.webp');
  --paper-tile-size: 800px auto;
}

/* ============================================================
   Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  background-color: var(--nav-bg);
  background-image: var(--paper-texture);
  background-repeat: repeat;
  background-size: var(--paper-tile-size);
  color: var(--text-primary);
  line-height: 1.5;
  font-variation-settings: 'SERF' 50;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent-primary); color: #fff; }
:target { scroll-margin-top: 116px; }
.text-block[id], .home-section[id] { scroll-margin-top: 116px; }

.container {
  max-width: var(--page-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  width: 100%;
}

.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ============================================================
   Eyebrow / tag text (Figma: Roobert 11/500, ls 25%, uppercase)
   ============================================================ */
.eyebrow {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body); font-size: 11px; font-weight: 500; line-height: 1.05;
  letter-spacing: 0.25em; text-transform: uppercase; color: var(--neutral-800);
}
.eyebrow sub { text-transform: none; font-size: 0.8em; }
.eyebrow .sym { text-transform: none; }
.eyebrow-badge { padding: 8px 12px; border-radius: var(--radius-sm); background: var(--nav-bg); }
.eyebrow-outline { padding: 7px 11px; border-radius: var(--radius-sm); border: 1px solid var(--neutral-800); background: transparent; }
.eyebrow-solid { padding: 8px 12px; border-radius: var(--radius-sm); background: var(--accent-primary); color: #fff; font-size: 13px; letter-spacing: 0.22em; }
.eyebrow-accent { color: var(--accent-primary); }
.eyebrow-navy { padding: 8px 12px; border-radius: var(--radius-sm); background: var(--brand-navy); color: #fff; }

/* ============================================================
   Navbar (Decart shared nav)
   ============================================================ */
.site-nav {
  position: sticky; top: 0; z-index: 100; height: 92px;
  background-color: var(--nav-bg);
  background-image: var(--paper-texture); background-repeat: repeat; background-size: var(--paper-tile-size);
}
.site-nav > .container { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.site-logo { display: flex; align-items: center; gap: var(--space-sm); text-decoration: none; color: var(--text-primary); }
.site-logo img { height: 20px; width: auto; }
.site-logo-badge {
  font-family: var(--font-body); font-size: 12px; font-weight: 500; letter-spacing: 0.25em; text-transform: uppercase;
  color: #FFFFFF; background: var(--neutral-800); padding: 8px 12px; line-height: 1.05; border-radius: 4.71px;
}
.site-nav-links { display: flex; align-items: center; gap: var(--space-2xl); }
.site-nav-links a { font-family: var(--font-body); font-size: 16px; font-weight: 500; line-height: 1.5; color: var(--nav-link); text-decoration: none; transition: color 0.15s; }
.site-nav-links a:hover { color: var(--text-primary); }
.site-nav-cta {
  font-size: 11px !important; font-weight: 500 !important; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--accent-primary) !important; border: 1px solid var(--accent-primary); border-radius: var(--radius-sm);
  padding: 10px 16px; transition: background 0.15s, color 0.15s;
}
.site-nav-cta:hover { background: var(--accent-primary); color: #fff !important; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 0 10px;
  margin-right: -10px; background: none; border: 0; cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.nav-toggle span { display: block; width: 100%; height: 1.5px; background: var(--text-primary); border-radius: 2px; transition: transform 0.28s ease, opacity 0.2s ease; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   Article header (first fold)
   ============================================================ */
.article-shell { padding-top: 72px; position: relative; }
.article-header {
  display: flex; align-items: center; gap: var(--space-2xl); justify-content: space-between;
  padding-bottom: var(--space-5xl); border-bottom: 1px solid var(--divider);
}
.article-header-main { flex: 1 1 auto; max-width: var(--article-measure); min-width: 0; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-sm); margin-bottom: var(--space-xl); }
.article-meta .article-date { font-family: var(--font-body); font-size: calc(15px * var(--tscale)); line-height: 1.45; letter-spacing: -0.005em; color: rgba(0,0,0,0.55); opacity: 0.8; }
.article-meta .article-byline { font-family: var(--font-display); font-weight: var(--w-mix-medium); font-size: calc(16px * var(--tscale)); line-height: 1.45; letter-spacing: -0.005em; color: rgba(0,0,0,0.7); }
.article-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: #4D4C4B; }

.article-title {
  font-family: var(--font-display); font-size: clamp(38px, 4.3vw, 62px); font-weight: var(--w-mix-regular);
  line-height: 1.1; letter-spacing: -0.03em; color: #101010; max-width: var(--article-measure); margin-bottom: var(--space-xl);
}
.article-title .accent { color: var(--accent-article); }
.article-lede { font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.52; color: #4f4f4f; opacity: 0.9; max-width: 644px; margin-bottom: var(--space-2xl); }
.article-lede strong { color: var(--text-primary); font-weight: 500; }

/* Authors */
.authors { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-bottom: var(--space-md); }
.author { font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.45; color: var(--text-primary); display: inline-flex; align-items: baseline; gap: 6px; }
.author a { color: var(--text-primary); text-decoration: none; border-bottom: 1px solid rgba(61,94,202,0.35); transition: color .15s, border-color .15s; }
.author a:hover { color: var(--accent-article); border-color: var(--accent-article); }
.author sup { font-size: 0.62em; color: var(--text-tertiary); line-height: 1; }
.author.is-decart a { color: var(--accent-primary); border-color: rgba(37,72,246,0.35); }
.decart-chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 8px 3px 6px; border-radius: 4px;
  background: var(--accent-primary); color: #fff; font-size: 10px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; line-height: 1.2;
  transform: translateY(-2px);
}
.decart-chip img { height: 9px; width: auto; filter: brightness(0) invert(1); }
.affils { display: flex; flex-direction: column; gap: 4px; margin-bottom: var(--space-2xl); }
.affil { font-family: var(--font-body); font-size: 14px; line-height: 1.5; color: var(--neutral-600); }
.affil sup { color: var(--text-muted); margin-right: 4px; }
.affil.is-decart { color: var(--accent-primary); font-weight: 500; }
.affil a { text-decoration: none; border-bottom: 1px solid rgba(0,0,0,0.15); }
.affil a:hover { border-color: currentColor; }

/* Paper links (button row) */
.paper-links { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.btn-pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: var(--radius-full);
  background: var(--nav-bg); border: 1px solid var(--neutral-800); color: #000; font-family: var(--font-body);
  font-size: 15px; font-weight: 500; line-height: 1.4; text-decoration: none; cursor: pointer;
  transition: background-color .25s ease, color .25s ease, border-color .25s ease;
}
.btn-pill svg { width: 16px; height: 16px; flex: 0 0 16px; }
.btn-pill:hover { background: var(--neutral-800); color: var(--nav-bg); }
.btn-pill.is-primary { background: var(--accent-primary); border-color: var(--accent-primary); color: #fff; }
.btn-pill.is-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }

/* ============================================================
   Hero simulator (the article cover slot — Figma 503:2849 chrome)
   ============================================================ */
.article-hero-demo { flex: 0 0 560px; max-width: 560px; }
.sim-card { background: #f5f5f5; border: 0; border-radius: 40px; padding: 22px 22px 24px; }
.sim-top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-sm); margin-bottom: 14px; }
.seg { display: inline-flex; padding: 3px; background: var(--nav-bg); border-radius: var(--radius-full); gap: 2px; }
.seg button {
  border: 0; background: transparent; padding: 7px 13px; border-radius: var(--radius-full); cursor: pointer;
  font-size: 11px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: #5d5d5d; transition: background .2s, color .2s;
}
.seg button[aria-selected="true"] { background: var(--accent-primary); color: #fff; }
.seg button:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
.sim-step { font-family: var(--font-body); font-size: 11px; font-weight: 500; letter-spacing: 0.22em; text-transform: uppercase; color: var(--neutral-800); white-space: nowrap; }
.sim-step strong { color: var(--accent-primary); font-weight: 500; font-variant-numeric: tabular-nums; }

.sim-prompt { display: flex; align-items: center; gap: 12px; background: var(--nav-bg); border-radius: 16px; padding: 10px 14px; margin-bottom: 12px; }
.sim-prompt .eyebrow { font-size: 10px; letter-spacing: 0.2em; color: var(--harmful); white-space: nowrap; }
.sim-prompt p { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.45; color: #0a0a0a; opacity: 0.8; margin: 0; }

.sim-canvas { background: var(--nav-bg); border-radius: 16px; padding: 14px 14px 12px; margin-bottom: 12px; position: relative; }
.sim-tokens { display: flex; flex-wrap: wrap; gap: 6px; min-height: 74px; align-content: flex-start; }
.tok {
  display: inline-flex; align-items: center; justify-content: center; min-width: 34px; height: 30px; padding: 0 9px;
  border-radius: 7px; font-family: var(--font-mono); font-size: 12.5px; line-height: 1; white-space: nowrap;
  border: 1.5px dashed transparent; transition: background-color .25s, color .25s, border-color .25s, transform .25s;
}
.tok--mask { background: var(--neutral-200); color: var(--neutral-400); border-color: transparent; letter-spacing: 1px; }
.tok--harmful { background: var(--harmful-soft); color: #9E2323; border-color: rgba(217,59,59,0.7); }
.tok--harmful.is-committed { background: var(--harmful); color: #fff; border-style: solid; border-color: var(--harmful); }
.tok--revising { background: var(--revising-soft); color: #7A4E07; border-color: rgba(184,119,14,0.75); }
.tok--safe { background: var(--safe-soft); color: #146B3A; border-color: rgba(31,157,85,0.7); }
.tok--safe.is-committed { background: var(--safe); color: #fff; border-style: solid; border-color: var(--safe); }
.tok--eos { background: transparent; color: var(--neutral-400); border: 1.5px dotted var(--neutral-300); font-size: 10.5px; letter-spacing: 0.06em; }
.tok.is-new { animation: tok-pop .32s ease-out; }
@keyframes tok-pop { from { transform: scale(0.86); } to { transform: scale(1); } }

.sim-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 10px; }
.sim-legend span { display: inline-flex; align-items: center; gap: 6px; font-size: 10.5px; letter-spacing: 0.06em; color: #5d5d5d; text-transform: uppercase; }
.sim-legend i { width: 14px; height: 9px; border-radius: 3px; display: inline-block; border: 1.5px solid transparent; }
.sim-legend .l-mask i { background: var(--neutral-200); }
.sim-legend .l-pred i { background: var(--harmful-soft); border-color: var(--harmful); border-style: dashed; }
.sim-legend .l-commit i { background: var(--harmful); }
.sim-legend .l-safe i { background: var(--safe); }

.sim-state { position: absolute; top: -10px; right: 14px; display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 70px; background: var(--neutral-800); color: #fff; font-size: 10px; font-weight: 500; letter-spacing: 0.2em; text-transform: uppercase; line-height: 1.1; transition: background-color .25s; }
.sim-state i { width: 7px; height: 7px; border-radius: 50%; background: #fff; }
.sim-state[data-kind="harmful"] { background: var(--harmful); }
.sim-state[data-kind="revising"] { background: var(--revising); }
.sim-state[data-kind="safe"] { background: var(--safe); }
.sim-state[data-kind="mask"] { background: var(--neutral-500); }

.sim-sri { background: var(--nav-bg); border-radius: 16px; padding: 12px 14px 10px; margin-bottom: 14px; }
.sim-sri-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.sim-sri-head .eyebrow { font-size: 10px; letter-spacing: 0.2em; }
.sim-sri-head .sim-sri-val { font-family: var(--font-mono); font-size: 12px; color: var(--accent-primary); font-variant-numeric: tabular-nums; white-space: nowrap; }
.sim-sri svg { display: block; width: 100%; height: auto; }
.sim-sri .zone-comp { fill: rgba(217,59,59,0.07); }
.sim-sri .zone-ref { fill: rgba(31,157,85,0.09); }
.sim-sri .grid { stroke: #E3E3E3; stroke-width: 1; }
.sim-sri .ref-harmless { stroke: var(--neutral-400); stroke-width: 1.5; fill: none; }
.sim-sri .ref-refusal { stroke: var(--neutral-400); stroke-width: 1.5; fill: none; stroke-dasharray: 3 3; }
.sim-sri .path-main { stroke: var(--accent-primary); stroke-width: 2.2; fill: none; stroke-linejoin: round; stroke-linecap: round; }
.sim-sri .path-ghost { stroke: rgba(37,72,246,0.18); stroke-width: 2; fill: none; stroke-linejoin: round; }
.sim-sri .marker { fill: var(--accent-primary); stroke: var(--nav-bg); stroke-width: 2; }
.sim-sri .zone-label { font-family: var(--font-body); font-size: 8.5px; letter-spacing: 0.12em; text-transform: uppercase; fill: #7a7a7a; }
.sim-sri .axis-label { font-family: var(--font-body); font-size: 8.5px; fill: #9a9a9a; }
.sim-sri-legend { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 6px; }
.sim-sri-legend span { display: inline-flex; align-items: center; gap: 6px; font-size: 10.5px; color: #5d5d5d; }
.sim-sri-legend i { width: 16px; height: 0; border-top: 2px solid var(--neutral-400); display: inline-block; }
.sim-sri-legend .l-main i { border-color: var(--accent-primary); }
.sim-sri-legend .l-ref i { border-top-style: dashed; }

.sim-controls { display: flex; align-items: center; gap: 12px; padding: 0 4px; }
.sim-play {
  flex: 0 0 38px; width: 38px; height: 38px; border-radius: 50%; border: 0; background: var(--neutral-800); color: #fff; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; transition: background .2s;
}
.sim-play:hover { background: var(--accent-primary); }
.sim-play svg { width: 14px; height: 14px; }
.sim-play .ico-pause { display: none; }
.sim-play.is-playing .ico-play { display: none; }
.sim-play.is-playing .ico-pause { display: block; }
.slider-track-wrapper { position: relative; flex: 1; height: 24px; display: flex; align-items: center; }
.slider-track-wrapper::before { content: ''; position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-50%); height: 12px; border-radius: 62px; background: var(--nav-bg); }
.styled-slider { -webkit-appearance: none; appearance: none; width: 100%; height: 24px; background: transparent; outline: none; cursor: pointer; position: relative; z-index: 2; margin: 0; }
.styled-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 24px; height: 24px; border-radius: 50%; background: var(--accent-primary); border: 3.6px solid #fff; box-shadow: 0 0 0 1px #d4d4d4, 0 0 5.2px rgba(255,255,255,0.2); cursor: grab; }
.styled-slider::-moz-range-thumb { width: 24px; height: 24px; border-radius: 50%; background: var(--accent-primary); border: 3.6px solid #fff; box-shadow: 0 0 0 1px #d4d4d4; cursor: grab; }
.styled-slider:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--accent-deep); outline-offset: 2px; }
.slider-fill { position: absolute; left: 0; top: 50%; transform: translateY(-50%); height: 12px; border-radius: 62px; background: var(--accent-primary); pointer-events: none; z-index: 1; width: 0%; }
.sim-caption { margin-top: 12px; padding: 0 6px; font-size: 11.5px; line-height: 1.45; color: #7a7a7a; }
.sim-caption strong { color: var(--neutral-700); font-weight: 500; }

/* ============================================================
   Section shells (home page rhythm)
   ============================================================ */
.home-section { max-width: var(--page-w); margin: 0 auto; padding: var(--space-4xl) var(--gutter) var(--space-5xl); width: 100%; }
.home-section--tight { padding-bottom: var(--space-4xl); }
.home-section-heading { font-family: var(--font-display); font-size: 40px; font-weight: var(--w-mix-regular); line-height: 1.08; letter-spacing: -0.01em; color: var(--neutral-900); margin-bottom: var(--space-3xl); }
.section-intro { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; margin-bottom: var(--space-3xl); }
.section-intro .home-section-heading { margin-bottom: 0; max-width: 664px; }
.section-intro p { font-family: var(--font-body); font-size: 18px; line-height: 1.52; letter-spacing: -0.02em; color: var(--neutral-700); opacity: 0.7; text-align: right; max-width: 520px; }

/* TL;DR panel: heading on top, then three beats as cards; robust at every width */
.tldr { background: var(--surface-panel); border-radius: var(--radius-lg); padding: 28px 32px 32px; display: flex; flex-direction: column; gap: var(--space-xl); }
.tldr-side { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: var(--space-md) var(--space-2xl); }
.tldr-side .eyebrow-badge { align-self: flex-start; }
.tldr-side h3 { font-family: var(--font-display); font-size: clamp(24px, 2.2vw, 32px); font-weight: var(--w-mix-regular); line-height: 1.15; letter-spacing: -0.02em; color: var(--brand-navy); max-width: 720px; flex: 1 1 100%; }
.tldr ul, .tldr-beats { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 0; padding: 0; }
.tldr li { position: relative; padding: 18px 20px 20px; background: var(--nav-bg); border-radius: 20px; font-family: var(--font-body); font-size: 15.5px; line-height: 1.5; letter-spacing: -0.01em; color: var(--neutral-700); }
.tldr li::before { content: none; }
.tldr li .beat-label { display: block; margin-bottom: 10px; font-size: 11px; font-weight: 500; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-primary); }
.tldr li strong { color: var(--neutral-900); font-weight: 500; }
@media (max-width: 1000px) { .tldr ul, .tldr-beats { grid-template-columns: 1fr; } }

/* Stats (Figma stat cards) */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-xl); }
.stat-card { background: var(--surface-panel); border-radius: 28px; padding: 28px 24px 32px; }
.stat-card .eyebrow-badge { margin-bottom: var(--space-2xl); }
.stat-value { font-family: var(--font-display); font-size: clamp(24px, 2.15vw, 34px); white-space: nowrap; font-weight: var(--w-mix-regular); line-height: 1.08; letter-spacing: 0.01em; color: var(--brand-navy); margin-bottom: var(--space-xl); }
.stat-value .arrow { color: var(--accent-primary); }
.stat-caption { font-family: var(--font-body); font-size: 15px; line-height: 1.52; letter-spacing: -0.01em; color: var(--neutral-700); opacity: 0.7; }

/* ============================================================
   Article body + quick links rail (second fold)
   ============================================================ */
.article-main { display: grid; grid-template-columns: minmax(0, 978px) 266px; gap: 68px; align-items: start; padding-top: var(--space-4xl); }
.article-body { max-width: 1010px; min-width: 0; }
.text-block { margin-bottom: var(--space-5xl); }
.text-block .section-eyebrow { display: inline-flex; margin-bottom: var(--space-md); }
.article-body h2 { font-family: var(--font-display); font-size: calc(26px * var(--tscale)); font-weight: var(--w-mix-medium); line-height: 1.3; letter-spacing: -0.01em; color: rgba(0,0,0,0.9); margin-bottom: var(--space-md); }
.article-body h2 .accent { color: var(--accent-article); }
.article-body h3 { font-family: var(--font-display); font-size: calc(20px * var(--tscale)); font-weight: var(--w-mix-medium); line-height: 1.45; letter-spacing: -0.005em; color: rgba(0,0,0,0.9); margin: var(--space-2xl) 0 var(--space-md); }
.article-body p { font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.52; letter-spacing: -0.02em; color: #4f4f4f; opacity: 0.8; margin-bottom: var(--space-md); }
.article-body p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { margin: 0 0 var(--space-md); padding-left: 1.4em; color: #4f4f4f; opacity: 0.8; }
.article-body li { font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.52; letter-spacing: -0.02em; margin-bottom: var(--space-xs); }
.article-body a:not(.btn-pill):not(.article-closing-cta) { color: var(--accent-article); text-decoration: none; border-bottom: 1px solid rgba(61,94,202,0.3); }
.article-body a:not(.btn-pill):not(.article-closing-cta):hover { border-color: var(--accent-article); }
.article-body strong { color: var(--text-primary); font-weight: 600; }
.article-body em { color: var(--text-primary); font-style: italic; }
.article-body code { font-family: var(--font-mono); font-size: 0.85em; background: var(--bg-tertiary); padding: 2px 6px; border-radius: var(--radius-sm); color: var(--accent-primary); }
.article-body .figure, .article-body .figure-grid, .article-body .callout, .article-body .equation-block, .article-body .tech-cards, .article-body .insight-row, .article-body .chart-card, .article-body .explorer, .article-body .rq-cards { margin-top: var(--space-2xl); margin-bottom: var(--space-2xl); }

/* Key takeaway callout (Decart :::note — accent rule, no panel) */
.callout { padding: var(--space-md) 0 var(--space-md) var(--space-lg); border-left: 2px solid var(--accent-article); }
.callout .eyebrow { margin-bottom: var(--space-sm); color: var(--accent-article); }
.callout p { margin-bottom: 0; color: var(--text-primary); opacity: 1; font-size: calc(17px * var(--tscale)); line-height: 1.45; letter-spacing: -0.015em; }

/* Figures */
.figure { margin: var(--space-2xl) 0; }
.figure img { width: 100%; border-radius: 28px; background: #fff; }
.figure.is-plot img { padding: 18px; background: #fff; }
.figure.is-narrow img { max-width: 560px; margin: 0 auto; }
.figure-caption { margin-top: var(--space-sm); font-family: var(--font-body); font-size: calc(14px * var(--tscale)); color: var(--text-muted); line-height: 1.5; }
.figure-caption strong { color: var(--neutral-600); font-weight: 500; }
.figure-grid { display: grid; grid-template-columns: repeat(var(--cols, 2), 1fr); gap: var(--space-xl); }
.figure-grid .figure { margin: 0; }

/* Equations (Figma: #F5F5F5 rounded cards, tracked blue label, mono formula) */
.equation-block { background: var(--surface-panel); border: none; border-radius: 16px; padding: var(--space-xl) var(--space-2xl); text-align: center; }
.equation { display: flex; flex-direction: column; align-items: center; gap: var(--space-sm); }
.eq-label { font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: .2em; color: var(--accent-article); }
.eq-content { font-family: var(--font-mono); font-size: 15.5px; line-height: 1.9; color: var(--text-primary); padding: var(--space-xs) 0; }
.eq-content sub, .eq-content sup { font-size: 0.7em; }
.eq-hl-a { color: var(--accent-article); }
.eq-hl-b { color: #d97706; }
.eq-hl-c { color: #059669; }
.equation-caption { margin-top: var(--space-md); font-size: calc(12.5px * var(--tscale)); color: var(--text-muted); line-height: 1.6; }
.equation-caption strong { color: var(--neutral-600); font-weight: 500; }

/* Tech cards (3 grey cards with number chips) */
.tech-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.tech-card { background: var(--surface-panel); border: none; border-radius: 16px; padding: var(--space-lg); }
.tech-card-num { width: 22px; height: 22px; border-radius: var(--radius-sm); background: var(--accent-article); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; margin-bottom: var(--space-md); }
.tech-card h4 { font-family: var(--font-mono); font-size: calc(13px * var(--tscale)); font-weight: 500; margin-bottom: var(--space-sm); padding-bottom: var(--space-sm); border-bottom: 1px solid var(--neutral-200); color: var(--text-primary); }
.tech-card h4.is-sans { font-family: var(--font-body); font-size: calc(15px * var(--tscale)); letter-spacing: -0.02em; }
.tech-card p { font-size: calc(13.5px * var(--tscale)); color: #585857; line-height: 1.5; opacity: 1; margin: 0; }

/* Research-question cards (pillar-card language) */
.rq-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.rq-card { background: var(--surface-panel); border-radius: 24px; padding: 24px 24px 26px; }
.rq-card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: var(--space-lg); }
.rq-num { font-family: var(--font-display); font-size: 26px; font-weight: var(--w-mix-regular); line-height: 1.08; letter-spacing: -0.01em; color: var(--brand-navy); }
.rq-card p { font-size: calc(14.5px * var(--tscale)); line-height: 1.5; color: var(--neutral-700); opacity: 0.9; margin: 0; }
.rq-card p strong { font-weight: 500; }

/* Insight cards (grey r32, marker square, head over hairline) */
.insight-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
.insight-card { background: #f5f5f5; border: 0; border-radius: 32px; padding: 28px 28px 32px; display: flex; flex-direction: column; align-items: stretch; gap: var(--space-xl); }
.insight-marker { width: 32px; height: 32px; border-radius: 3px; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 16px; font-weight: var(--w-mix-medium); color: #fff; flex-shrink: 0; background: var(--accent-primary); }
.insight-marker-x { background: #f57474; }
.insight-marker-check { background: #8de9ae; }
.insight-head { display: flex; flex-wrap: wrap; gap: 4px 8px; font-size: 19px; line-height: 1.4; letter-spacing: -0.03em; padding-bottom: var(--space-sm); border-bottom: 1px solid var(--neutral-200); }
.insight-head strong { color: var(--neutral-900); font-weight: 400; }
.insight-head span { color: #4f4f4f; opacity: 0.7; }
.insight-card p { font-size: calc(14px * var(--tscale)); color: #4d565f; opacity: 0.95; line-height: 1.45; margin: 0; }

/* ============================================================
   Charts (HTML/CSS bars; thin marks, 4px rounded data-end, direct labels)
   ============================================================ */
.chart-card { background: var(--surface-panel); border-radius: 28px; padding: 26px 28px 28px; }
.chart-head { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 14px 24px; margin-bottom: 18px; }
.chart-title { font-family: var(--font-body); font-size: 18px; font-weight: 400; letter-spacing: -0.03em; line-height: 1.35; color: var(--neutral-900); }
.chart-title small { display: block; font-size: 13.5px; letter-spacing: -0.01em; color: var(--neutral-500); margin-top: 3px; }
.chart-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.chart-controls .seg { background: var(--nav-bg); }
.chart-controls .seg button { padding: 7px 12px; }
.select-wrap { position: relative; display: inline-flex; align-items: center; }
.select-wrap select {
  appearance: none; -webkit-appearance: none; border: 0; background: var(--nav-bg); border-radius: var(--radius-full); padding: 9px 36px 9px 14px;
  font-family: var(--font-body); font-size: 12.5px; font-weight: 500; letter-spacing: 0.02em; color: var(--neutral-800); cursor: pointer;
}
.select-wrap::after { content: ''; position: absolute; right: 14px; top: 50%; width: 7px; height: 7px; border-right: 1.5px solid var(--neutral-800); border-bottom: 1.5px solid var(--neutral-800); transform: translateY(-70%) rotate(45deg); pointer-events: none; }
.select-wrap select:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
.btn-ghost { border: 1px solid var(--neutral-300); background: transparent; border-radius: var(--radius-full); padding: 8px 14px; font-size: 12.5px; font-weight: 500; color: var(--neutral-800); cursor: pointer; transition: border-color .15s, background .15s; }
.btn-ghost:hover { border-color: var(--neutral-800); }
.btn-ghost[aria-pressed="true"] { background: var(--neutral-800); color: #fff; border-color: var(--neutral-800); }

.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-bottom: 14px; }
.legend span { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--neutral-600); }
.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

.hbars { display: flex; flex-direction: column; gap: 10px; }
.hbar-group { display: grid; grid-template-columns: minmax(96px, 150px) 1fr; gap: 14px; align-items: center; }
.hbar-group + .hbar-group.is-family-break { margin-top: 10px; padding-top: 14px; border-top: 1px solid var(--neutral-200); }
.hbar-label { font-size: 14px; line-height: 1.3; letter-spacing: -0.01em; color: var(--neutral-800); display: flex; flex-direction: column; gap: 2px; }
.hbar-label small { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--neutral-400); }
.hbar-track-set { display: flex; flex-direction: column; gap: 4px; }
.hbar-row { position: relative; height: 18px; display: flex; align-items: center; }
.hbar-row .bar { height: 14px; border-radius: 0 4px 4px 0; background: var(--series-diffusion); width: 0%; transition: width .55s cubic-bezier(.22,.61,.36,1); min-width: 0; position: relative; }
.hbar-row .bar.is-ar { background: var(--series-ar); }
.hbar-row .bar.is-dim { background: var(--neutral-300); }
.hbar-row .bar.is-emph { background: var(--series-diffusion); }
.hbar-row .val { font-family: var(--font-body); font-size: 12.5px; font-variant-numeric: tabular-nums; color: var(--neutral-800); margin-left: 8px; white-space: nowrap; transition: transform .55s cubic-bezier(.22,.61,.36,1); }
.hbar-row .val small { color: var(--neutral-400); font-size: 11px; }
.hbar-row:hover .bar, .hbar-row:focus-within .bar { filter: brightness(1.08); }
.hbar-baseline { position: absolute; left: 0; top: 0; bottom: 0; width: 1px; background: var(--neutral-300); }
.hbar-grid { position: relative; height: 18px; margin-top: 4px; }
.hbar-grid span { position: absolute; top: 2px; transform: translateX(-50%); font-size: 10.5px; color: var(--neutral-400); font-variant-numeric: tabular-nums; white-space: nowrap; }
.hbar-grid span.is-first { transform: none; }
.hbar-grid span.is-last { transform: translateX(-100%); }
.chart-note { margin-top: 14px; font-size: 12.5px; line-height: 1.5; color: var(--neutral-500); }
.chart-note strong { color: var(--neutral-700); font-weight: 500; }

.chart-tip { position: fixed; z-index: 200; pointer-events: none; background: var(--neutral-850); color: #fff; padding: 8px 11px; border-radius: 8px; font-size: 12.5px; line-height: 1.4; box-shadow: 0 8px 24px rgba(0,0,0,0.18); opacity: 0; transform: translate(-50%, calc(-100% - 10px)); transition: opacity .12s; max-width: 260px; }
.chart-tip.is-on { opacity: 1; }
.chart-tip strong { font-weight: 600; color: #fff; }
.chart-tip small { display: block; color: rgba(255,255,255,0.7); }

/* Table view */
.table-view { margin-top: 18px; overflow-x: auto; }
.table-view[hidden] { display: none; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; font-variant-numeric: tabular-nums; }
.data-table th, .data-table td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--neutral-200); white-space: nowrap; }
.data-table th { font-weight: 500; color: var(--neutral-500); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }
.data-table th:first-child, .data-table td:first-child { text-align: left; color: var(--neutral-800); }
.data-table tr.is-best td { color: var(--accent-primary); font-weight: 500; }
.data-table tr.is-emph td { font-weight: 500; }
.data-table td.is-ar { color: var(--neutral-500); }
.data-table caption { caption-side: bottom; text-align: left; padding-top: 8px; font-size: 12px; color: var(--neutral-400); }

/* Defense comparison (Table 13) */
.defense-rows { display: flex; flex-direction: column; gap: 6px; }
.defense-head, .defense-row { display: grid; grid-template-columns: 150px repeat(4, 1fr); gap: 14px; align-items: center; }
.defense-head span { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--neutral-400); }
.defense-head span:first-child { color: transparent; }
.defense-row { padding: 10px 12px; border-radius: 14px; background: transparent; transition: background .2s; }
.defense-row.is-ours { background: var(--nav-bg); box-shadow: inset 0 0 0 1px rgba(37,72,246,0.35); }
.defense-name { font-size: 14px; letter-spacing: -0.01em; color: var(--neutral-800); display: flex; flex-direction: column; gap: 3px; }
.defense-name small { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-primary); }
.mini { display: flex; align-items: center; gap: 8px; min-width: 0; }
.mini .track { flex: 1; height: 10px; border-radius: 0 4px 4px 0; background: var(--series-track); position: relative; overflow: hidden; }
.mini .fill { position: absolute; left: 0; top: 0; bottom: 0; width: 0%; background: var(--series-ar); border-radius: 0 4px 4px 0; transition: width .55s cubic-bezier(.22,.61,.36,1); }
.defense-row.is-ours .mini .fill { background: var(--series-diffusion); }
.mini .num { font-size: 12.5px; font-variant-numeric: tabular-nums; color: var(--neutral-800); min-width: 52px; text-align: right; }

/* SRI explorer (paper figures 12 & 13, one model at a time) */
.explorer { background: var(--surface-panel); border-radius: 28px; padding: 26px 28px 28px; }
.explorer-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.explorer-tabs button { border: 1px solid transparent; background: var(--nav-bg); border-radius: var(--radius-full); padding: 9px 14px; font-size: 12.5px; font-weight: 500; color: var(--neutral-800); cursor: pointer; display: inline-flex; align-items: center; gap: 8px; transition: background .2s, color .2s, border-color .2s; }
.explorer-tabs button i { width: 8px; height: 8px; border-radius: 50%; background: var(--series-ar); display: inline-block; }
.explorer-tabs button.is-dlm i { background: var(--series-diffusion); }
.explorer-tabs button[aria-selected="true"] { background: var(--neutral-800); color: #fff; }
.explorer-tabs button[aria-selected="true"] i { background: #fff; }
.explorer-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: var(--space-lg); }
.explorer-pane { background: #fff; border-radius: 20px; padding: 16px; position: relative; }
.explorer-pane img { width: 100%; height: auto; }
.explorer-pane .pane-label { position: absolute; top: 12px; left: 12px; z-index: 2; }
.explorer-note { margin-top: 16px; display: flex; gap: 14px; align-items: flex-start; padding: 16px 18px; background: var(--nav-bg); border-radius: 16px; }
.explorer-note .fam { flex: 0 0 auto; }
.explorer-note p { font-size: 14.5px; line-height: 1.5; color: var(--neutral-700); opacity: 1; margin: 0; }
.explorer-note p strong { font-weight: 500; }

/* Closing CTA button (same button as Read the Paper on Decart) */
.article-closing-cta { display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: var(--radius-full); background: var(--nav-bg); border: 1px solid var(--neutral-800); color: #000; font-family: var(--font-body); font-size: calc(16px * var(--tscale)); font-weight: 500; line-height: 1.5; text-decoration: none; margin-top: var(--space-2xl); transition: background-color .25s ease, color .25s ease; }
.article-closing-cta:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: var(--nav-bg); }

/* ============================================================
   Quick links rail (Figma 437:7871)
   ============================================================ */
.quick-links { position: sticky; top: 120px; width: 266px; }
.quick-links-title { width: 177px; padding: 6px 0; font-family: var(--font-body); font-size: calc(14px * var(--tscale) * var(--rail-scale)); font-weight: 500; line-height: 1.05; letter-spacing: 0.25em; text-transform: uppercase; color: #313131; opacity: 0.7; margin-bottom: var(--space-sm); }
.quick-links-list { display: flex; flex-direction: column; padding-bottom: var(--space-sm); border-bottom: 1px solid var(--divider); margin-bottom: var(--space-sm); }
.quick-links-list a, .quick-links-share { display: flex; align-items: center; gap: var(--space-xs); width: 100%; padding: var(--space-xs) 0; font-family: var(--font-body); font-size: calc(16px * var(--tscale) * var(--rail-scale)); line-height: 1.5; color: #101010; opacity: 0.9; text-decoration: none; background: none; border: none; cursor: pointer; text-align: left; }
.quick-links-list a:hover, .quick-links-share:hover { color: var(--accent-article); opacity: 1; }
.quick-links .ql-icon { flex: 0 0 calc(24px * var(--rail-scale)); width: calc(24px * var(--rail-scale)); height: calc(24px * var(--rail-scale)); color: #585857; }
.quick-links .ql-icon svg { display: block; width: 100%; height: 100%; }
.toc { list-style: none; display: flex; flex-direction: column; margin-top: var(--space-md); }
.toc a { display: flex; align-items: baseline; gap: 10px; padding: 6px 0; font-size: calc(14px * var(--tscale) * var(--rail-scale)); line-height: 1.4; color: #4f4f4f; text-decoration: none; border-left: 2px solid transparent; padding-left: 10px; margin-left: -12px; transition: color .15s, border-color .15s; }
.toc a small { font-variant-numeric: tabular-nums; color: var(--neutral-400); font-size: 0.8em; }
.toc a:hover { color: var(--accent-article); }
.toc a.is-active { color: var(--neutral-900); border-color: var(--accent-primary); }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px); background: var(--neutral-850); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 13px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 300; }
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ============================================================
   Decart banner (CTA card language) + quote
   ============================================================ */
.cta-banner {
  position: relative; overflow: hidden;
  background-color: #1d2c5e;
  background-image: url('../assets/img/paper-grain-neutral.webp'), url('../assets/img/cta-backdrop.webp');
  background-repeat: repeat, no-repeat; background-size: var(--paper-tile-size), cover; background-position: 0 0, center center;
  background-blend-mode: soft-light, normal;
  border-radius: var(--radius-lg); padding: 52px 48px; display: grid; grid-template-columns: 1.3fr 1fr; gap: var(--space-3xl); align-items: end;
}
.cta-banner .blueprint { position: absolute; inset: 0; pointer-events: none; opacity: 0.35; }
.cta-banner > * { position: relative; }
.cta-banner .eyebrow-badge { background: var(--nav-bg); color: var(--neutral-800); margin-bottom: var(--space-3xl); }
.cta-banner h3 { font-family: var(--font-display); font-size: clamp(30px, 3vw, 44px); font-weight: var(--w-mix-regular); line-height: 1.15; letter-spacing: -0.015em; color: var(--nav-bg); max-width: 640px; margin-bottom: var(--space-xl); }
.cta-banner p { font-family: var(--font-body); font-size: 16px; line-height: 1.52; color: rgba(255,255,255,0.75); max-width: 560px; margin-bottom: var(--space-xl); }
.cta-banner .btn-pill { border-color: var(--nav-bg); background: var(--nav-bg); color: #000; }
.cta-banner .btn-pill:hover { background: transparent; color: var(--nav-bg); }
.cta-banner .btn-pill.is-ghost { background: transparent; color: var(--nav-bg); border-color: rgba(255,255,255,0.55); }
.cta-banner .btn-pill.is-ghost:hover { border-color: var(--nav-bg); background: rgba(255,255,255,0.08); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.people-card { background: rgba(255,254,251,0.08); border: 1px solid rgba(255,255,255,0.18); border-radius: 24px; padding: 22px 24px; display: flex; flex-direction: column; gap: 18px; backdrop-filter: blur(6px); }
.people-card .person { display: flex; align-items: center; gap: var(--space-md); }
.people-card .avatar { width: 64px; height: 64px; border-radius: 50%; overflow: hidden; flex-shrink: 0; background: linear-gradient(140deg, rgba(255,255,255,0.5), rgba(255,255,255,0.15)); }
.people-card .avatar img { width: 100%; height: 100%; object-fit: cover; }
.people-card .person-name { font-family: var(--font-display); font-size: 20px; font-weight: var(--w-mix-medium); line-height: 1.3; color: rgba(255,255,255,0.95); }
.people-card .person-role { font-family: var(--font-body); font-size: 14px; line-height: 1.45; color: rgba(255,254,251,0.78); }
.people-card .person-role a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,0.35); }
.people-card .person-role a:hover { border-color: #fff; }
.people-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.people-card li { font-size: 14px; line-height: 1.45; color: rgba(255,254,251,0.85); padding-left: 14px; position: relative; }
.people-card li::before { content: ''; position: absolute; left: 0; top: 0.6em; width: 5px; height: 5px; border-radius: 50%; background: rgba(255,255,255,0.7); }
.affil-logos { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.affil-logos img { height: 44px; width: auto; border-radius: 8px; background: rgba(255,255,255,0.9); padding: 4px; }

.quote-block {
  background-color: #465db3;
  background-image: url('../assets/img/paper-grain-neutral.webp'), url('../assets/img/quote-backdrop.webp');
  background-repeat: repeat, no-repeat; background-size: var(--paper-tile-size), cover; background-position: 0 0, center center;
  background-blend-mode: soft-light, normal;
  border-radius: 40px; padding: 52px 48px; display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-3xl);
}
.quote-block blockquote { font-family: var(--font-body); font-size: clamp(22px, 2.3vw, 32px); font-weight: 400; line-height: 1.28; letter-spacing: -0.02em; color: rgba(255,255,255,0.35); max-width: 923px; margin: 0; }
.quote-block .qw { color: rgba(255,255,255,0.35); transition: color 0.3s ease-out; }
.quote-block .qw.on { color: var(--nav-bg); }
.quote-attribution { display: flex; align-items: center; gap: var(--space-md); }
.quote-name { font-family: var(--font-display); font-size: 18px; font-weight: var(--w-mix-medium); line-height: 1.45; letter-spacing: -0.005em; color: rgba(255,255,255,0.9); }
.quote-role { font-family: var(--font-body); font-size: 15px; line-height: 1.5; color: var(--nav-bg); opacity: 0.8; }
.quote-role a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,0.4); }

/* Code / tool card */
.tool-card {
  background-color: #bccae2;
  background-image: url('../assets/img/paper-grain-neutral.webp'), linear-gradient(135deg, #cfd9ee 0%, #b4c5e4 55%, #a6b6dc 100%);
  background-repeat: repeat, no-repeat; background-size: var(--paper-tile-size), cover; background-blend-mode: soft-light, normal;
  border-radius: 40px; padding: 52px; display: flex; align-items: center; gap: var(--space-2xl);
}
.tool-card-body { flex: 0 0 520px; max-width: 520px; }
.tool-card .eyebrow-badge { font-size: 13px; letter-spacing: 0.22em; margin-bottom: var(--space-2xl); display: inline-flex; }
.tool-card h4 { font-family: var(--font-display); font-size: clamp(34px, 3.4vw, 48px); font-weight: var(--w-mix-regular); line-height: 1.08; letter-spacing: -0.03em; color: var(--neutral-900); margin-bottom: var(--space-xl); }
.tool-card p { font-family: var(--font-body); font-size: 17px; line-height: 1.52; letter-spacing: -0.01em; color: var(--neutral-800); opacity: 0.9; margin-bottom: var(--space-xl); }
.tool-card-cta { display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: var(--radius-full); background: var(--nav-bg); color: #000; font-family: var(--font-body); font-size: 16px; font-weight: 500; line-height: 1.5; text-decoration: none; transition: background-color .25s ease, color .25s ease; }
.tool-card-cta:hover { background-color: var(--neutral-800); color: var(--nav-bg); }
.tool-card-cta svg { width: 18px; height: 18px; }
.tool-card-media { flex: 1 1 auto; min-width: 0; background: #FBFCFD; border-radius: var(--radius-md); overflow: hidden; padding: 22px 24px; }
.code-block { font-family: var(--font-mono); font-size: 13px; line-height: 1.7; color: var(--neutral-800); white-space: pre; overflow-x: auto; margin: 0; }
.code-block .c { color: var(--neutral-400); }
.code-block .k { color: var(--accent-primary); }
.model-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.model-chips span { padding: 6px 10px; border-radius: 6px; background: #EEF2FA; font-size: 12px; font-weight: 500; color: var(--neutral-700); display: inline-flex; align-items: center; gap: 6px; }
.model-chips span i { width: 7px; height: 7px; border-radius: 50%; background: var(--series-ar); display: inline-block; }
.model-chips span.is-dlm i { background: var(--series-diffusion); }

/* BibTeX */
.bibtex-block { background: var(--surface-panel); border-radius: 24px; padding: 24px 28px; position: relative; }
.bibtex-block pre { font-family: var(--font-mono); font-size: 13.5px; line-height: 1.65; color: var(--neutral-800); white-space: pre-wrap; word-break: break-word; margin: 0; }
.bibtex-copy { position: absolute; top: 18px; right: 18px; }
.contact-list { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: var(--space-md); }
.contact-list a { font-size: 15px; color: var(--accent-article); text-decoration: none; border-bottom: 1px solid rgba(61,94,202,0.3); }

/* ============================================================
   Footer (Figma: single black bar)
   ============================================================ */
.site-footer { background: #000; margin-top: var(--space-4xl); }
.site-footer-inner { padding-top: var(--space-xl); padding-bottom: var(--space-xl); display: flex; align-items: center; justify-content: space-between; gap: var(--space-xl); flex-wrap: wrap; }
.site-footer-logo { display: flex; align-items: center; gap: var(--space-xl); }
.site-footer-logo img { height: 22px; filter: brightness(0) invert(1); }
.site-footer-social { display: flex; align-items: center; gap: var(--space-lg); }
.site-footer-social a { color: #fff; display: inline-flex; opacity: 0.9; }
.site-footer-social a:hover { opacity: 1; }
.site-footer-social svg { width: 18px; height: 18px; }
.site-footer-legal { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-xl); font-family: var(--font-body); font-size: 11px; font-weight: 500; line-height: 1.05; letter-spacing: 0.25em; text-transform: uppercase; color: #fff; }
.site-footer-legal a { text-decoration: none; color: #fff; }
.site-footer-legal .dot { width: 4px; height: 4px; border-radius: 50%; background: #fff; }
.site-footer-note { border-top: 1px solid rgba(255,255,255,0.14); }
.site-footer-note .container { padding-top: 14px; padding-bottom: 16px; font-size: 12.5px; line-height: 1.5; color: rgba(255,255,255,0.6); }
.site-footer-note a { color: rgba(255,255,255,0.85); text-decoration: none; }

/* ============================================================
   Reveal on scroll (opt-out with reduced motion)
   ============================================================ */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s cubic-bezier(.22,.61,.36,1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .tok.is-new { animation: none; }
  .hbar-row .bar, .mini .fill { transition: none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1200px) {
  .article-main { grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; }
  .quick-links { width: 220px; }
  /* .stats-grid keeps four columns here; two columns start at 1000px (rule at the end of the sheet) */
  .tool-card-body { flex-basis: 440px; }
}

@media (max-width: 1060px) {
  .article-header { flex-direction: column; align-items: stretch; }
  .article-hero-demo { flex: none; width: 100%; max-width: 640px; }
  .cta-banner { grid-template-columns: 1fr; }
}

/* ------------------------------------------------------------
   Tablet and phone (<= 900px)
   Reading comfort first: solid ink instead of opacity fades, 17px+
   body copy at 1.55 line-height, single columns, a fully stacked
   hero simulator, and tap targets of at least 40px. Desktop rules
   above 900px are untouched.
   ------------------------------------------------------------ */
@media (max-width: 900px) {
  :root { --gutter: 24px; }
  :target, .text-block[id], .home-section[id] { scroll-margin-top: 88px; }

  /* Nav: 72px sticky bar + drawer. Drawer links are 18px with 14px
     vertical padding; the arXiv CTA reads as a plain link in the drawer. */
  .site-nav { height: 72px; position: sticky; }
  .site-logo-badge { font-size: 9px; padding: 6px 9px; border-radius: 3.6px; }
  .nav-toggle { display: flex; }
  .site-nav-links {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; padding: 0 var(--gutter);
    background-color: var(--nav-bg); background-image: var(--paper-texture); background-repeat: repeat; background-size: var(--paper-tile-size);
    border-bottom: 0 solid var(--divider); max-height: 0; overflow: hidden; visibility: hidden; transition: max-height 0.32s ease, visibility 0s linear 0.32s;
  }
  .nav-open .site-nav-links { max-height: 70vh; overflow-y: auto; visibility: visible; border-bottom-width: 1px; transition: max-height 0.32s ease, visibility 0s; }
  .site-nav-links a { padding: 14px 0; font-size: 18px; line-height: 1.5; color: var(--text-primary); border-bottom: 1px solid var(--divider); }
  .site-nav-links a:last-child { border-bottom: 0; }
  .site-nav-links .site-nav-cta {
    border: 0 !important; border-radius: 0; padding: 14px 0 !important; font-size: 18px !important; letter-spacing: 0 !important; text-transform: none !important;
    color: var(--text-primary) !important; background: transparent !important;
  }
  .site-nav-links .site-nav-cta:hover { color: var(--accent-primary) !important; }
  body.nav-open { overflow: hidden; }

  /* Eyebrows: 10px with 0.16em tracking so section labels stay on one line */
  .eyebrow { font-size: 10px; letter-spacing: 0.16em; }
  .eyebrow-badge, .eyebrow-navy { padding: 7px 10px; }
  .eyebrow-outline { padding: 6px 10px; }
  .tool-card .eyebrow-badge { font-size: 10px; letter-spacing: 0.16em; }

  /* First fold: header */
  .article-shell { padding-top: 32px; }
  .article-header { gap: 28px; padding-bottom: 36px; }
  .article-header-main { max-width: none; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 6px; margin-bottom: var(--space-lg); }
  .article-meta .dot { display: none; }
  .article-meta .article-date { font-size: 14px; line-height: 1.45; color: rgba(0,0,0,0.6); opacity: 1; }
  .article-meta .article-byline { font-size: 16px; line-height: 1.4; }
  .article-title { font-size: clamp(30px, 8.5vw, 40px); line-height: 1.1; margin-bottom: var(--space-lg); }
  .article-lede { font-size: 17.5px; line-height: 1.55; letter-spacing: -0.01em; color: #333; opacity: 1; max-width: none; margin-bottom: var(--space-xl); }
  .authors { gap: 6px 16px; margin-bottom: var(--space-sm); }
  .author { font-size: 16px; line-height: 1.5; }
  .affils { margin-bottom: var(--space-xl); }
  .affil { font-size: 14px; line-height: 1.5; }
  .paper-links { gap: 10px; }
  .btn-pill { min-height: 40px; }

  /* Hero simulator: everything stacks. Rules stay generic (.sim-card and
     the .sim-* / .tok / .seg components) so JS-side class additions keep working. */
  .article-hero-demo { max-width: none; width: 100%; }
  .sim-card { padding: 16px 16px 18px; border-radius: 28px; }
  .sim-top { flex-wrap: wrap; justify-content: flex-start; gap: 10px 12px; margin-bottom: 12px; }
  .seg { max-width: 100%; flex-wrap: wrap; }
  .seg button { min-height: 40px; padding: 7px 10px; font-size: 10px; letter-spacing: 0.06em; white-space: nowrap; }
  .sim-step { flex: 1 1 100%; font-size: 10px; letter-spacing: 0.16em; }
  .sim-prompt { flex-direction: column; align-items: flex-start; gap: 6px; padding: 10px 12px; border-radius: 14px; margin-bottom: 10px; }
  .sim-prompt p { font-size: 13px; line-height: 1.5; opacity: 0.9; }
  .sim-canvas { padding: 12px; border-radius: 14px; margin-bottom: 10px; }
  .sim-state {
    position: static; display: inline-flex; align-items: flex-start; max-width: 100%; margin: 0 0 10px; padding: 7px 10px; border-radius: 12px;
    font-size: 10px; letter-spacing: 0.12em; line-height: 1.35; white-space: normal; text-align: left;
  }
  .sim-state i { flex: 0 0 7px; margin-top: 3px; }
  .sim-tokens { gap: 6px; min-height: 146px; }
  /* Elements added by the simulator script (base look lives in css/hero.css);
     the .sim-card prefix keeps these phone sizes ahead of that sheet. */
  .sim-card .tok-prev { font-size: 11.5px; line-height: 1.45; }
  .sim-card .sim-hint { margin-top: 10px; font-size: 12px; line-height: 1.4; }
  .sim-card .sim-note p { font-size: 13.5px; line-height: 1.5; }
  .sim-card .sim-note-live { gap: 4px 14px; font-size: 12px; }
  .tok { height: 32px; min-width: 36px; padding: 0 9px; font-size: 13px; border-radius: 8px; }
  .tok--eos { font-size: 11px; }
  .sim-legend { gap: 6px 12px; margin-top: 12px; }
  .sim-legend span { font-size: 11.5px; letter-spacing: 0; text-transform: none; }
  .sim-sri { padding: 12px 12px 10px; border-radius: 14px; margin-bottom: 12px; }
  .sim-sri-head { flex-wrap: wrap; align-items: center; gap: 4px 10px; margin-bottom: 8px; }
  .sim-sri-head .eyebrow { font-size: 9.5px; letter-spacing: 0.12em; line-height: 1.4; justify-content: flex-start; text-align: left; white-space: normal; }
  .sim-sri-head .sim-sri-val { font-size: 12.5px; }
  .sim-sri svg { width: 100%; height: auto; overflow: visible; }
  .sim-sri .zone-label, .sim-sri .axis-label { font-size: 10px; }
  .sim-sri-legend { gap: 4px 12px; margin-top: 8px; }
  .sim-sri-legend span { font-size: 11px; }
  .sim-controls { width: 100%; gap: 12px; padding: 0 2px; }
  .sim-play { flex: 0 0 40px; width: 40px; height: 40px; }
  .slider-track-wrapper { height: 40px; }
  .styled-slider { height: 40px; }
  .styled-slider::-webkit-slider-thumb { width: 28px; height: 28px; }
  .styled-slider::-moz-range-thumb { width: 28px; height: 28px; }
  .sim-caption { margin-top: 12px; padding: 0 4px; font-size: 13px; line-height: 1.5; color: var(--neutral-600); }

  /* Section shells: about 40px vertical rhythm */
  .home-section { padding: 40px var(--gutter); }
  .home-section--tight { padding-bottom: 16px; }
  .home-section-heading { font-size: 28px; line-height: 1.12; margin-bottom: var(--space-xl); }
  .section-intro { flex-direction: column; align-items: flex-start; gap: 10px; margin-bottom: var(--space-xl); }
  .section-intro .home-section-heading { max-width: none; }
  .section-intro p { font-size: 17px; line-height: 1.55; letter-spacing: -0.01em; color: #333; opacity: 1; text-align: left; max-width: none; }

  /* TL;DR + stats */
  .tldr { gap: var(--space-lg); padding: 20px; border-radius: 24px; }
  .tldr-side { gap: var(--space-sm); }
  .tldr-side h3 { font-size: 24px; line-height: 1.15; }
  .tldr ul, .tldr-beats { grid-template-columns: 1fr; gap: 12px; }
  .tldr li { font-size: 16.5px; line-height: 1.55; letter-spacing: -0.01em; color: #333; padding: 16px 18px 18px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 20px; border-radius: 22px; }
  .stat-card .eyebrow-badge { margin-bottom: 18px; }
  .stat-value { font-size: clamp(22px, 3.4vw, 30px); margin-bottom: 12px; }
  .stat-caption { font-size: 17px; line-height: 1.5; letter-spacing: -0.01em; color: #333; opacity: 1; }

  /* Article body: solid ink, larger copy, 48px between blocks */
  .article-main { grid-template-columns: 1fr; gap: 0; row-gap: 28px; padding-top: 32px; }
  .article-body { max-width: none; }
  .text-block { margin-bottom: 48px; }
  .text-block .section-eyebrow { margin-bottom: 12px; }
  .article-body h2 { font-size: 27px; line-height: 1.2; letter-spacing: -0.015em; margin-bottom: 12px; }
  .article-body h3 { font-size: 21px; line-height: 1.3; margin: 24px 0 10px; }
  .article-body p { font-size: 17.5px; line-height: 1.55; letter-spacing: -0.01em; color: #333; opacity: 1; margin-bottom: 14px; }
  .article-body ul, .article-body ol { color: #333; opacity: 1; padding-left: 1.25em; }
  .article-body li { font-size: 17.5px; line-height: 1.55; letter-spacing: -0.01em; }
  .article-body .figure, .article-body .figure-grid, .article-body .callout, .article-body .equation-block, .article-body .tech-cards, .article-body .insight-row, .article-body .chart-card, .article-body .explorer, .article-body .rq-cards { margin-top: 24px; margin-bottom: 24px; }
  .article-closing-cta { font-size: 16px; margin-top: 24px; }
  .callout { padding: 10px 0 10px 16px; }
  .callout .eyebrow { margin-bottom: 8px; }
  .callout p { font-size: 18px; line-height: 1.45; letter-spacing: -0.01em; }

  /* Figures */
  .figure { margin: 24px 0; }
  .figure img { border-radius: 18px; }
  .figure.is-plot img { padding: 10px; }
  .figure-caption, .article-body .figure-caption { margin-top: 10px; font-size: 14px; line-height: 1.5; letter-spacing: -0.005em; color: var(--neutral-600); }
  .figure-grid { gap: 20px; }

  /* Equations: left aligned 13px mono; a long line scrolls inside the block
     instead of breaking mid-formula. The caption stays put below. */
  .equation-block { padding: 16px; border-radius: 16px; text-align: left; overflow-x: auto; }
  .equation { align-items: flex-start; gap: 8px; max-width: 100%; overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin; }
  .eq-label { letter-spacing: 0.16em; }
  .eq-content { font-size: 13px; line-height: 1.8; white-space: nowrap; padding: 4px 0; }
  .equation-caption, .article-body .equation-caption { margin-top: 12px; font-size: 14px; line-height: 1.5; letter-spacing: -0.005em; color: var(--neutral-600); }

  /* Cards: 20px padding, 20-24px radius, single column, body-size copy */
  .tech-cards, .rq-cards, .insight-row, .figure-grid, .explorer-grid { grid-template-columns: 1fr; }
  .tech-cards { gap: 12px; }
  .tech-card { padding: 20px; border-radius: 20px; }
  .tech-card h4 { font-size: 15px; }
  .tech-card h4.is-sans { font-size: 17px; }
  .tech-card p { font-size: 17px; line-height: 1.55; color: #333; }
  .rq-cards { gap: 12px; }
  .rq-card { padding: 20px; border-radius: 22px; }
  .rq-card-top { margin-bottom: 14px; }
  .rq-num { font-size: 24px; }
  .rq-card p { font-size: 17px; line-height: 1.55; color: #333; opacity: 1; }
  .insight-row { gap: 12px; }
  .insight-card { padding: 20px; border-radius: 22px; gap: 16px; }
  .insight-head { font-size: 18px; line-height: 1.35; letter-spacing: -0.02em; }
  .insight-card p { font-size: 17px; line-height: 1.55; color: #333; opacity: 1; }

  /* Charts: label above its bars, larger labels, tappable controls */
  .chart-card, .explorer { padding: 20px; border-radius: 22px; }
  .chart-head { flex-direction: column; align-items: stretch; gap: 12px; margin-bottom: 14px; }
  .chart-title { font-size: 17px; line-height: 1.35; }
  .chart-title small { font-size: 13px; margin-top: 4px; }
  .chart-controls { gap: 8px; }
  .chart-controls .seg button { padding: 7px 12px; }
  .select-wrap select { min-height: 40px; padding: 8px 36px 8px 14px; font-size: 14px; }
  .btn-ghost { min-height: 40px; padding: 8px 16px; font-size: 13px; }
  .legend { gap: 6px 14px; margin-bottom: 14px; }
  .legend span { font-size: 13px; }
  .hbars { gap: 14px; }
  .hbar-group { grid-template-columns: 1fr; gap: 6px; }
  .hbar-group + .hbar-group.is-family-break { margin-top: 6px; padding-top: 14px; }
  .hbar-label { flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 2px 8px; font-size: 14px; }
  .hbar-label small { font-size: 10.5px; }
  .hbar-row { height: 20px; }
  .hbar-row .bar { height: 14px; }
  .hbar-row .val { font-size: 13px; }
  .hbar-row .val small { font-size: 11px; }
  .hbar-grid { height: 20px; }
  .hbar-grid span { font-size: 11px; }
  .chart-note, .article-body .chart-note { margin-top: 14px; font-size: 14px; line-height: 1.5; letter-spacing: -0.005em; color: var(--neutral-600); }
  .chart-tip { max-width: 240px; font-size: 13px; }
  .table-view { margin-top: 16px; -webkit-overflow-scrolling: touch; }

  /* Defense comparison: two minis per row; each mini stacks label + value
     over a visible 8px track (flex: none and an explicit height). */
  .defense-rows { gap: 8px; }
  .defense-head { display: none; }
  .defense-row { grid-template-columns: 1fr 1fr; gap: 12px; padding: 12px; border-radius: 14px; align-items: stretch; }
  .defense-name { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 2px 8px; font-size: 15px; }
  .defense-name small { font-size: 10px; letter-spacing: 0.08em; }
  .mini { flex-direction: column-reverse; justify-content: flex-start; align-items: stretch; gap: 6px; min-width: 0; }
  .mini .track { flex: none; width: 100%; height: 8px; }
  .mini .num { display: block; min-width: 0; text-align: left; font-size: 14px; font-weight: 500; line-height: 1.3; }
  .mini .num::before { content: attr(data-label); display: block; font-size: 10px; font-weight: 400; line-height: 1.3; letter-spacing: 0.08em; text-transform: uppercase; color: var(--neutral-500); margin-bottom: 3px; }

  /* Explorer: tabs in one horizontally scrollable row (scrollbar hidden), panes stacked */
  .explorer .chart-head { margin-bottom: 12px; }
  .explorer-tabs { flex-wrap: nowrap; gap: 8px; margin: 0 -20px 14px; padding: 2px 20px 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .explorer-tabs::-webkit-scrollbar { display: none; }
  .explorer-tabs button { flex: 0 0 auto; min-height: 40px; padding: 0 14px; font-size: 13px; }
  .explorer-grid { gap: 12px; }
  .explorer-pane { padding: 10px; border-radius: 16px; }
  .explorer-note { flex-direction: column; align-items: flex-start; gap: 10px; padding: 14px 16px; margin-top: 12px; }
  .explorer-note p { font-size: 15px; line-height: 1.5; color: #333; }

  /* Quick links: a compact row of link chips above the article; TOC hidden */
  .quick-links { position: static; width: auto; order: -1; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-bottom: 20px; border-bottom: 1px solid var(--divider); }
  .quick-links-title { width: 100%; padding: 0; font-size: 10px; letter-spacing: 0.16em; margin-bottom: 4px; }
  .quick-links-list { display: contents; }
  .quick-links-list a, .quick-links-share {
    width: auto; min-height: 40px; padding: 8px 14px 8px 10px; gap: 6px; border: 1px solid var(--neutral-300); border-radius: var(--radius-full);
    background: var(--nav-bg); font-size: 14px; line-height: 1.3; opacity: 1;
  }
  .quick-links-list a:hover, .quick-links-share:hover { border-color: var(--neutral-800); color: var(--text-primary); }
  .quick-links .ql-icon { flex: 0 0 18px; width: 18px; height: 18px; }
  .toc { display: none; }

  /* Banner, quote, tool card, BibTeX */
  .cta-banner { grid-template-columns: 1fr; gap: 24px; padding: 24px 20px; border-radius: 24px; }
  .cta-banner .eyebrow-badge { margin-bottom: 20px; }
  .cta-banner h3 { font-size: clamp(26px, 7vw, 32px); margin-bottom: 14px; }
  .cta-banner p { font-size: 17px; line-height: 1.55; color: rgba(255,255,255,0.9); margin-bottom: 20px; }
  .cta-actions { gap: 8px; }
  .people-card { padding: 20px; border-radius: 20px; gap: 14px; }
  .people-card .avatar { width: 52px; height: 52px; }
  .people-card .person-name { font-size: 18px; }
  .people-card .person-role { font-size: 14px; }
  .people-card li { font-size: 15px; line-height: 1.5; }
  .affil-logos img { height: 40px; }
  .quote-block { padding: 24px 20px; border-radius: 24px; gap: 24px; }
  .quote-block blockquote { font-size: 22px; line-height: 1.32; }
  .quote-name { font-size: 17px; }
  .quote-role { font-size: 14px; }
  .tool-card { flex-direction: column; align-items: stretch; gap: 20px; padding: 24px 20px; border-radius: 24px; }
  .tool-card-body { flex: none; max-width: none; }
  .tool-card .eyebrow-badge { margin-bottom: 18px; }
  .tool-card h4 { font-size: clamp(26px, 7.5vw, 34px); margin-bottom: 14px; }
  .tool-card p { font-size: 17px; line-height: 1.55; color: var(--neutral-800); opacity: 1; margin-bottom: 20px; }
  .tool-card-media { padding: 16px; border-radius: 16px; }
  .code-block { font-size: 12px; line-height: 1.65; }
  .bibtex-block { padding: 20px; border-radius: 20px; }
  .bibtex-block pre { font-size: 12.5px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; overflow-wrap: anywhere; }
  .bibtex-copy { position: static; margin-bottom: 12px; }
  .contact-list { gap: 4px 20px; }
  .contact-list a { display: inline-flex; align-items: center; min-height: 40px; font-size: 16px; border-bottom: 0; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(61,94,202,0.4); }

  /* Footer: stacked with 16px gaps, 40px icon targets, 13px note */
  .site-footer { margin-top: 40px; }
  .site-footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; padding-top: 20px; padding-bottom: 20px; }
  .site-footer-logo { flex-wrap: wrap; gap: 16px 20px; }
  .site-footer-social { gap: 4px; margin-left: -11px; }
  .site-footer-social a { padding: 11px; }
  .site-footer-legal { gap: 12px; font-size: 10px; letter-spacing: 0.16em; }
  .site-footer-legal a { display: inline-flex; align-items: center; min-height: 40px; }
  .site-footer-note .container { padding-top: 14px; padding-bottom: 18px; font-size: 13px; line-height: 1.5; color: rgba(255,255,255,0.7); }
}

/* ------------------------------------------------------------
   Phones (<= 560px): single column stats, full-width chart controls
   ------------------------------------------------------------ */
@media (max-width: 560px) {
  .stats-grid { grid-template-columns: 1fr; gap: 12px; }
  .stat-value { font-size: clamp(26px, 8vw, 34px); }
  .paper-links .btn-pill { padding: 9px 14px; font-size: 14px; }
  .sim-legend { gap: 4px 10px; }
  /* Hero mode switch: two equal buttons across the card; a long label
     (for example a model name plus sampler) wraps inside its button. */
  .sim-card .seg { display: flex; width: 100%; flex-wrap: nowrap; }
  .sim-card .seg button, .sim-card .seg button[role="tab"] { flex: 1 1 0; min-width: 0; display: inline-flex; align-items: center; justify-content: center; white-space: normal; text-align: center; line-height: 1.25; padding: 6px 8px; letter-spacing: 0.06em; }
  .sim-tokens { min-height: 160px; }
  /* css/hero.css (loaded after this sheet) shrinks these on phones; keep the
     13px tokens, 32px chips and 13px prompt text for readability. */
  .sim-card .sim-tokens .tok { font-size: 13px; height: 32px; min-width: 36px; padding: 0 9px; }
  .sim-card .sim-prompt p { font-size: 13px; }
  .chart-head .select-wrap { width: 100%; }
  .chart-head .select-wrap select { width: 100%; }
  .defense-row { grid-template-columns: 1fr 1fr; gap: 12px; }
  /* Banner buttons: stacked full width so long labels do not wrap mid-pill */
  .cta-actions { flex-direction: column; align-items: stretch; gap: 10px; }
  .cta-actions .btn-pill { justify-content: center; text-align: center; }
}

/* ---- Equation terms: side by side on wide screens, stacked on phones ---- */
.eq-term { display: inline-block; margin: 0 0.9em; white-space: nowrap; }
@media (max-width: 900px) {
  .eq-term { display: block; margin: 4px 0; text-align: left; }
}

/* ---- Captions and notes are <p> inside .article-body, so they need this specificity to keep their own size ---- */
@media (min-width: 901px) {
  .article-body .figure-caption { font-size: calc(14px * var(--tscale)); color: var(--text-muted); opacity: 1; line-height: 1.5; }
  .article-body .chart-note { font-size: 13.5px; line-height: 1.55; color: var(--neutral-500); opacity: 1; }
  .article-body .equation-caption { font-size: calc(12.5px * var(--tscale)); color: var(--text-muted); opacity: 1; line-height: 1.6; }
}

/* ---- Flow diagram: a row of numbered steps joined by arrows (stacks on phones) ---- */
.flow { display: flex; align-items: stretch; gap: 10px; margin: var(--space-2xl) 0; }
.flow-step { flex: 1 1 0; min-width: 0; background: var(--surface-panel); border-radius: 20px; padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; }
.flow-step.is-accent { background: var(--brand-navy); color: #fff; }
.flow-num { width: 24px; height: 24px; border-radius: var(--radius-sm); background: var(--accent-primary); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; }
.flow-step.is-accent .flow-num { background: #fff; color: var(--brand-navy); }
.flow-step h4 { font-family: var(--font-body); font-size: 15.5px; font-weight: 500; letter-spacing: -0.02em; color: var(--neutral-900); margin: 0; }
.flow-step.is-accent h4 { color: #fff; }
.flow-step p { font-size: 13.5px; line-height: 1.5; color: var(--neutral-600); margin: 0; opacity: 1; letter-spacing: -0.01em; }
.flow-step.is-accent p { color: rgba(255,255,255,0.8); }
.flow-step code { font-size: 12px; }
.flow-arrow { flex: 0 0 auto; align-self: center; font-size: 22px; line-height: 1; color: var(--accent-primary); }
.article-body .flow { margin-top: var(--space-2xl); margin-bottom: var(--space-2xl); }
@media (max-width: 900px) {
  .flow { flex-direction: column; gap: 8px; }
  .flow-arrow { transform: rotate(90deg); align-self: flex-start; margin-left: 20px; }
  .flow-step p { font-size: 15px; color: #333; }
}

/* ---- Token-row diagram: static rows of the hero's token pills for comparing samplers ---- */
.tokrow-block { background: var(--surface-panel); border-radius: 24px; padding: 20px 22px; margin: var(--space-2xl) 0; display: flex; flex-direction: column; gap: 14px; }
.tokrow { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.tokrow-label { flex: 0 0 100%; font-size: 11px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--neutral-500); margin-bottom: 2px; }
.tokrow .tok { cursor: default; }
.tokrow-arrow { font-size: 14px; color: var(--neutral-400); padding: 0 2px; }
.tokrow-block .figure-caption { margin-top: 2px; }
@media (min-width: 901px) { .tokrow-label { flex-basis: 150px; margin-bottom: 0; } }

/* ---- Tool card inside the article column: stacked, no leftover flex-basis height ---- */
.article-body .tool-card { flex-direction: column; align-items: stretch; gap: var(--space-xl); padding: 40px; }
.article-body .tool-card-body { flex: none; max-width: none; }
.article-body .tool-card-body p { margin-bottom: var(--space-lg); }
.article-body .tool-card-media { width: 100%; }
@media (max-width: 900px) { .article-body .tool-card { padding: 24px 20px; } }

/* ============================================================
   Tablet (up to 1100px): one column, compact rail, wrapped flows
   ============================================================ */
@media (max-width: 1100px) {
  .article-main { grid-template-columns: 1fr; gap: 0; }
  .quick-links { position: static; width: auto; order: -1; padding-bottom: 20px; border-bottom: 1px solid var(--divider); margin-bottom: 8px; }
  .quick-links-title { width: auto; }
  .quick-links-list { flex-direction: row; flex-wrap: wrap; gap: 4px 18px; border-bottom: 0; padding-bottom: 0; margin-bottom: 0; }
  .quick-links-list a, .quick-links-share { width: auto; }
  .toc { display: none; }
  .flow { flex-wrap: wrap; gap: 12px; }
  .flow-step { flex: 1 1 calc(50% - 6px); }
  .flow-arrow { display: none; }
  /* .stats-grid keeps four columns here; two columns start at 1000px (rule at the end of the sheet) */
  .tech-cards, .rq-cards { grid-template-columns: repeat(2, 1fr); }
  .explorer-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Section jump bar (tablet and phone): sticky, horizontally scrollable
   ============================================================ */
.jumpbar { display: none; }
@media (max-width: 1100px) {
  .jumpbar {
    display: flex; gap: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none;
    position: sticky; top: 92px; z-index: 40; margin: 0 calc(-1 * var(--gutter)); padding: 10px var(--gutter);
    background-color: var(--nav-bg); background-image: var(--paper-texture); background-repeat: repeat; background-size: var(--paper-tile-size);
    border-bottom: 1px solid var(--divider);
  }
  .jumpbar::-webkit-scrollbar { display: none; }
  .jumpbar a { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: var(--radius-full); border: 1px solid var(--neutral-300); font-size: 13px; font-weight: 500; color: var(--neutral-800); text-decoration: none; white-space: nowrap; background: transparent; }
  .jumpbar a small { font-size: 11px; color: var(--neutral-400); font-variant-numeric: tabular-nums; }
  .jumpbar a.is-active { background: var(--neutral-800); border-color: var(--neutral-800); color: #fff; }
  .jumpbar a.is-active small { color: rgba(255,255,255,0.7); }
  .text-block[id], .home-section[id] { scroll-margin-top: 150px; }
}
@media (max-width: 900px) { .jumpbar { top: 72px; } }

/* ============================================================
   Phone (up to 700px): the short version of each act
   Secondary blocks (.deep) stay hidden until the reader opens the act.
   ============================================================ */
.more-btn { display: none; }
@media (max-width: 700px) {
  .lede-more { display: none; }
  .deep[hidden] { display: none !important; }
  .more-btn {
    display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; padding: 12px 18px; border-radius: var(--radius-full);
    border: 1px solid var(--neutral-800); background: var(--nav-bg); color: #000; font-family: var(--font-body); font-size: 15px; font-weight: 500; cursor: pointer;
  }
  .more-btn[aria-expanded="true"] { background: var(--neutral-800); color: #fff; }
  .more-btn .chev { display: inline-block; width: 8px; height: 8px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor; transform: rotate(45deg) translateY(-2px); }
  .more-btn[aria-expanded="true"] .chev { transform: rotate(-135deg) translateY(-2px); }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 16px 14px 18px; border-radius: 18px; }
  .stat-card .eyebrow-badge { margin-bottom: 14px; font-size: 9px; letter-spacing: 0.12em; padding: 6px 8px; }
  .stat-value { font-size: 22px; margin-bottom: 10px; }
  .stat-caption { font-size: 13px; line-height: 1.45; }
  .home-section-heading { font-size: 26px; }
  .article-body h2 { font-size: 24px; }
  .text-block { margin-bottom: 40px; }
  .tldr-side h3 { font-size: 22px; }
}

/* ---- Defenses at a glance (SVG scatter, mean over models) ---- */
.scatter svg { display: block; width: 100%; height: auto; }
.scatter .grid { stroke: #E3E3E3; stroke-width: 1; }
.scatter .grid.break { stroke-dasharray: 3 4; }
.scatter .axis { stroke: var(--neutral-300); stroke-width: 1; }
.scatter .tick { font-family: var(--font-body); font-size: 11px; fill: var(--neutral-400); font-variant-numeric: tabular-nums; }
.scatter .axis-title { font-family: var(--font-body); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; fill: var(--neutral-500); }
.scatter .hit { fill: transparent; }
.scatter .pt { stroke: var(--surface-panel); stroke-width: 2; }
.scatter .pt.is-ours { fill: var(--series-diffusion); }
.scatter .pt.is-base { fill: var(--series-ar); }
.scatter .pt.is-none { fill: #fff; stroke: var(--series-ar); stroke-width: 2; }
.scatter .lbl { font-family: var(--font-body); font-size: 12.5px; fill: var(--neutral-800); }
.scatter .lbl.is-ours { font-weight: 600; }
.scatter g:focus-visible .pt, .scatter g:hover .pt { filter: brightness(1.1); }

/* ---- Prominent action row in the "Use it" act ---- */
.build-actions { margin: var(--space-lg) 0 var(--space-xl); }
.build-actions .btn-pill { font-size: 16px; padding: 13px 22px; }
.article-body .recipe { margin: 0 0 var(--space-xl); }
.scatter svg.is-narrow .lbl { font-size: 15px; }
.scatter svg.is-narrow .tick { font-size: 13px; }
.scatter svg.is-narrow .axis-title { font-size: 12px; letter-spacing: 0.04em; }

/* ============================================================
   Reading aids for the simplified structure: a muted line under each
   section heading pointing at the paper, and spacing between the
   overview panel and the stat cards.
   ============================================================ */
.article-body .section-ref { font-size: 13px; line-height: 1.5; letter-spacing: 0.01em; color: var(--neutral-500); opacity: 1; margin: -4px 0 var(--space-lg); }
.tldr + .stats-grid { margin-top: var(--space-2xl); }
@media (max-width: 700px) {
  .article-body .section-ref { margin: 0 0 14px; }
  .tldr + .stats-grid { margin-top: 16px; }
}

/* ============================================================
   Layout fixes (2026-09-06)
   1. Overview panel: label above the thesis heading, both left-aligned,
      instead of a label at the far left and a heading floating right.
   2. Header: the cover is top-aligned with the title instead of being
      centred, so it no longer sinks when the title column is tall.
   3. Stat cards: four columns down to 1000px, then two.
   4. Cover: reserve only the token rows the slots need at each width.
   ============================================================ */
.tldr-side { flex-direction: column; align-items: flex-start; gap: var(--space-md); }
.tldr-side h3 { max-width: 940px; flex: none; }
.article-header { align-items: flex-start; }
.article-hero-demo { margin-top: 54px; }
@media (max-width: 1060px) {
  /* stacked header: the cover spans the full column instead of a 640px box on the left */
  .article-hero-demo { margin-top: 0; max-width: none; }
}
@media (max-width: 1000px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .sim-tokens { min-height: 74px; }
}
@media (max-width: 560px) {
  .sim-tokens { min-height: 112px; }
}
@media (max-width: 420px) {
  .sim-tokens { min-height: 150px; }
}

/* ============================================================
   First fold: the value proposition (tagline in display type and
   three proof points) replaces the paragraph lede.
   ============================================================ */
.article-dek { font-family: var(--font-display); font-size: clamp(20px, 1.65vw, 24px); font-weight: var(--w-mix-regular); line-height: 1.32; letter-spacing: -0.015em; color: var(--neutral-900); max-width: 644px; margin: 0 0 var(--space-xl); }
.article-dek strong { font-weight: var(--w-mix-medium); }
.value-points { list-style: none; margin: 0 0 var(--space-2xl); padding: 0; display: grid; gap: 12px; max-width: 644px; }
.value-points li { display: grid; grid-template-columns: 78px minmax(0, 1fr); gap: 0 14px; align-items: baseline; font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.5; letter-spacing: -0.01em; color: #333; }
.vp-label { font-size: 11px; font-weight: 500; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-primary); white-space: nowrap; }
.value-points strong { color: var(--neutral-900); font-weight: 500; }
@media (max-width: 900px) {
  .article-dek { font-size: 21px; max-width: none; }
  .value-points { max-width: none; }
  .value-points li { font-size: 16.5px; line-height: 1.55; }
}
@media (max-width: 700px) {
  .article-dek { font-size: 20px; margin-bottom: 18px; }
  .value-points { gap: 10px; margin-bottom: 24px; }
  .value-points li { font-size: 16px; grid-template-columns: 1fr; gap: 4px; }
}

/* ============================================================
   Space utilisation across desktop, tablet and phone (2026-09-06)
   ============================================================ */
/* Desktop: paragraphs and lists keep a readable measure inside the wide body; charts stay full width. */
@media (min-width: 1101px) {
  .text-block > p, .text-block > ol, .text-block > ul { max-width: 880px; }
}
/* Stacked header (up to 1060px): the text uses the column instead of stopping at 75% of it. */
@media (max-width: 1060px) {
  .article-header-main { max-width: none; }
  .article-dek, .value-points { max-width: 900px; }
}
/* Overview cards: three columns down to tablet portrait, one column only on phones. */
@media (min-width: 761px) {
  .tldr ul, .tldr-beats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 761px) and (max-width: 1000px) {
  .tldr li { padding: 16px 16px 18px; font-size: 15px; line-height: 1.5; }
}
/* Four-step flow: four across down to 901px, two by two on tablets, a column only on small phones. */
@media (min-width: 901px) and (max-width: 1100px) {
  .flow { flex-wrap: nowrap; gap: 10px; }
  .flow-step { flex: 1 1 0; }
  .flow-arrow { display: inline-flex; }
}
@media (min-width: 561px) and (max-width: 900px) {
  .flow { flex-direction: row; flex-wrap: wrap; gap: 12px; }
  .flow-step { flex: 1 1 calc(50% - 6px); }
  .flow-arrow { display: none; }
}
/* Explorer: the two figure panes stay side by side down to 701px. */
@media (min-width: 701px) and (max-width: 1100px) {
  .explorer-grid { grid-template-columns: 1.5fr 1fr; }
}
/* Phones: less nested padding so the overview cards and stats keep their width. */
@media (max-width: 700px) {
  .tldr { padding: 14px; }
  .tldr li { padding: 14px 16px 16px; }
}

/* ============================================================
   Header + body layout: no button row in the header (the quick-links rail carries those links);
   the simulator, the overview band and the body share the grid's main column, with the sticky
   quick-links rail beside them from the top of the simulator down.
   ============================================================ */
.article-header { display: block; }
.article-header-main { max-width: 978px; }
.article-title { max-width: 900px; }
.article-dek, .value-points { max-width: 820px; }
.article-column { min-width: 0; }
.article-column .article-hero-demo { flex: none; width: 100%; max-width: none; margin-top: 0; }
.article-column .home-section { max-width: none; width: auto; margin: 0; padding: var(--space-4xl) 0; }
.article-main > .jumpbar { grid-column: 1 / -1; }
@media (max-width: 900px) {
  .article-column .home-section { padding: 32px 0; }
}

/* ============================================================
   Typography brought in line with the "volume knob" article (article.html):
   56px title, Roobert lede, one heading size in the body (22 x tscale, Season medium),
   body copy at 70% ink, no numbered chips beside the subheaders, 28px panels.
   ============================================================ */
.article-shell { padding-top: 92px; }
.article-title { font-size: 56px; line-height: 1.16; }
.article-dek {
  font-family: var(--font-body); font-size: calc(16px * var(--tscale)); font-weight: 400; line-height: 1.52;
  letter-spacing: normal; color: #4f4f4f; opacity: 0.9; margin: 0 0 var(--space-xl);
}
.article-dek strong { font-weight: 500; color: var(--text-primary); }
.value-points li { line-height: 1.52; letter-spacing: -0.02em; color: #4f4f4f; opacity: 0.9; }
.value-points strong { font-weight: 500; }

.article-main { padding-top: var(--space-5xl); }
.text-block { margin-bottom: var(--space-4xl); }
.text-block .section-eyebrow { display: none; }
.article-body h2,
.article-body h3 { font-size: calc(22px * var(--tscale)); line-height: 1.45; letter-spacing: -0.005em; }
.article-body h2 { margin-bottom: var(--space-md); }
.article-body h3 { margin: var(--space-2xl) 0 var(--space-md); }
.article-body p,
.article-body ul,
.article-body ol { opacity: 0.7; }
@media (min-width: 1101px) {
  .text-block > p, .text-block > ol, .text-block > ul { max-width: none; }
}
.article-body .section-ref { opacity: 1; }
.figure-caption, .article-body .figure-caption { font-size: calc(16px * var(--tscale)); }
.callout p { font-size: calc(16px * var(--tscale)); line-height: 1.52; letter-spacing: -0.02em; }

/* Overview band and stat cards: same ink as the body headings instead of navy */
.tldr-side h3 { font-size: calc(22px * var(--tscale)); font-weight: var(--w-mix-medium); line-height: 1.45; letter-spacing: -0.005em; color: rgba(0, 0, 0, 0.9); }
.stat-value { color: #101010; }

/* Simulator card: the article's 28px panel radius and panel grey */
.sim-card { border-radius: 28px; background: var(--surface-panel); }
.sim-caption { font-size: 14px; line-height: 1.5; color: var(--text-muted); }

@media (max-width: 900px) { .article-title { font-size: 44px; } }
@media (max-width: 640px) { .article-title { font-size: 34px; } }

/* ============================================================
   Overview: no outer panel. The label and the thesis sit on the page; only the three
   beats (Recovery / Signal / Guard) are grey cards, on the same 28px radius as the stat cards.
   Labels inside cards are plain text, not white badges.
   ============================================================ */
.tldr { background: transparent; border-radius: 0; padding: 0; gap: var(--space-2xl); }
.tldr-side .eyebrow-badge,
.stat-card .eyebrow-badge { padding: 0; background: transparent; border-radius: 0; }
.tldr ul, .tldr-beats { gap: var(--space-xl); }
.tldr li { background: var(--surface-panel); border-radius: 28px; padding: 28px 24px 32px; }
.tldr + .stats-grid { margin-top: var(--space-xl); }
@media (max-width: 1000px) { .tldr ul, .tldr-beats { gap: var(--space-md); } .tldr + .stats-grid { margin-top: var(--space-md); } }
@media (max-width: 700px) { .tldr { padding: 0; } .tldr li { padding: 20px 20px 22px; } }

/* ============================================================
   "Use it" block: no tinted outer card. Label, heading, copy and the GitHub button sit on the
   page; only the code box is a panel (the article's grey, 28px radius).
   ============================================================ */
.article-body .tool-card { background: transparent; background-image: none; padding: 0; border: 0; border-radius: 0; box-shadow: none; }
.tool-card .eyebrow-badge { padding: 0; background: transparent; border-radius: 0; font-size: 11px; letter-spacing: 0.25em; margin-bottom: var(--space-md); }
.tool-card h4 { font-size: 32px; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: var(--space-md); }
.tool-card p { font-size: calc(16px * var(--tscale)); letter-spacing: -0.02em; color: #4f4f4f; opacity: 0.7; }
.article-body .tool-card-media { background: var(--surface-panel); border-radius: 28px; padding: 28px 32px; }
.model-chips span { background: var(--nav-bg); }
@media (max-width: 900px) {
  .article-body .tool-card { padding: 0; }
  .tool-card h4 { font-size: 26px; }
  .article-body .tool-card-media { padding: 18px 16px; border-radius: 20px; }
}

/* ============================================================
   Body grid: the text and graphics column is 978px, then 80px to the quick-links rail, which
   takes what is left (254px on a 1312px container). The Use-it heading is the body h2.
   ============================================================ */
.article-main { grid-template-columns: minmax(0, 978px) minmax(220px, 1fr); gap: 80px; }
.quick-links { width: auto; }
@media (max-width: 1200px) { .article-main { grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; } .quick-links { width: 220px; } }
@media (max-width: 1100px) { .article-main { grid-template-columns: 1fr; gap: 0; } .quick-links { width: auto; } }
.tool-card h4 { font-family: var(--font-display); font-size: calc(22px * var(--tscale)); font-weight: var(--w-mix-medium); line-height: 1.45; letter-spacing: -0.005em; color: rgba(0, 0, 0, 0.9); margin-bottom: var(--space-md); }

/* ============================================================
   Rhythm after the header, as on the volume-knob article: the simulator is a figure with its
   caption underneath (not inside the panel), 80px to the first heading, no label above it.
   ============================================================ */
#heroDemo > .sim-caption { margin: var(--space-sm) 0 0; padding: 0; font-family: var(--font-body); font-size: calc(16px * var(--tscale)); line-height: 1.5; color: var(--text-muted); }
#heroDemo > .sim-caption strong { color: var(--neutral-600); font-weight: 500; }
.article-column #tldr { padding-top: var(--space-5xl); }
/* the "Overview · how it works" label stays above the statement (kept on review) */
@media (max-width: 900px) { .article-column #tldr { padding-top: var(--space-3xl); } }

/* Section headings go straight into their first paragraph (16px), as on the volume-knob article.
   The small "Sections x.y of the paper" pointer lines under the headings are hidden. */
.article-body .section-ref { display: none; }

/* ============================================================
   Header centred on the page: meta, title, lede, value points, authors and affiliations all sit
   on the page's centre line; the value-point labels stack above their sentence.
   ============================================================ */
.article-header-main { margin: 0 auto; text-align: center; }
.article-meta { justify-content: center; }
.article-title { margin-left: auto; margin-right: auto; }
.article-dek { margin-left: auto; margin-right: auto; }
.value-points { margin-left: auto; margin-right: auto; justify-items: center; }
.value-points li { grid-template-columns: 1fr; gap: 6px; justify-items: center; text-align: center; }
.authors { justify-content: center; }
.affils { align-items: center; text-align: center; }

/* Value points keep their label column (left) beside the sentence, as one centred block;
   the title may use the full column so it breaks in two lines where it fits. */
.article-title { max-width: 978px; }
.value-points { max-width: 820px; justify-items: stretch; text-align: left; }
.value-points li { grid-template-columns: 78px minmax(0, 1fr); gap: 0 14px; justify-items: start; text-align: left; }
@media (max-width: 700px) { .value-points li { grid-template-columns: 1fr; gap: 4px; } }

/* ============================================================
   Institution logo buttons under the affiliations (from the project page): white cards with
   the logos, linking to each institution. Centred with the rest of the header.
   ============================================================ */
.affil-logo-row { display: flex; flex-wrap: wrap; justify-content: center; align-items: stretch; gap: 12px; max-width: 978px; margin: 0 auto; }
.logo-btn {
  display: inline-flex; align-items: center; justify-content: center; height: 66px; padding: 10px 18px;
  background: var(--nav-bg); border: 1px solid var(--divider); border-radius: 14px; text-decoration: none;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.logo-btn:hover, .logo-btn:focus-visible { border-color: var(--neutral-800); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }
.logo-btn img { height: 40px; width: auto; max-width: 210px; object-fit: contain; display: block; }
.logo-btn.is-square img { height: 46px; }
.logo-btn.is-wordmark img { height: 24px; }
@media (max-width: 700px) {
  .affil-logo-row { gap: 8px; }
  .logo-btn { height: 56px; padding: 8px 12px; border-radius: 12px; }
  .logo-btn img { height: 32px; max-width: 150px; }
  .logo-btn.is-square img { height: 38px; }
  .logo-btn.is-wordmark img { height: 20px; }
}

/* Simulator chart labels: the panel's 10.5px Roobert at every card width (--k set by main.js),
   zone names tracked uppercase like the legend, axis numbers tabular. */
.sim-sri .zone-label { font-family: var(--font-body); font-size: calc(10.5px * var(--k, 1)); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; fill: #7a7a7a; }
.sim-sri .axis-label { font-family: var(--font-body); font-size: calc(10.5px * var(--k, 1)); font-weight: 400; fill: #9a9a9a; font-variant-numeric: tabular-nums; }

/* ============================================================
   Stats as rows (design 2026-09-09): [value in a grey pill] [caption] [outline label], one row
   per figure with a hairline between rows. Same content as the cards.
   ============================================================ */
.stats-grid { display: grid; grid-template-columns: 1fr; gap: 0; }
.stat-card {
  display: grid; grid-template-columns: 236px minmax(0, 1fr) auto; align-items: center; gap: 0 32px;
  background: transparent; border-radius: 0; padding: 26px 0; border-bottom: 1px solid var(--divider);
}
.stat-card:first-child { padding-top: 0; }
.stat-value {
  order: 1; margin: 0; display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 70px; padding: 14px 20px; background: var(--surface-panel); border-radius: 20px;
  font-size: 22px; line-height: 1.15; letter-spacing: 0; white-space: normal; color: var(--brand-navy);
}
.stat-value br { display: none; }
.stat-caption { order: 2; margin: 0; font-size: calc(16px * var(--tscale)); line-height: 1.52; letter-spacing: -0.02em; color: #4f4f4f; opacity: 0.7; max-width: 44rem; }
.stat-card .eyebrow-badge {
  order: 3; margin: 0; justify-self: end; padding: 7px 11px; border-radius: var(--radius-sm);
  border: 1px solid var(--neutral-800); background: transparent; font-size: 11px; letter-spacing: 0.25em; white-space: nowrap;
}
@media (max-width: 1000px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-card { grid-template-columns: 200px minmax(0, 1fr); gap: 12px 24px; }
  .stat-card .eyebrow-badge { grid-column: 2; justify-self: start; }
}
@media (max-width: 700px) {
  .stat-card { grid-template-columns: 1fr; gap: 12px; padding: 20px 0; }
  .stat-value { min-height: 56px; font-size: 20px; }
  .stat-card .eyebrow-badge { grid-column: 1; margin: 0; }
  .stat-caption { font-size: 16px; }
}
.stat-value .arrow { margin: 0 0.3em; }
/* the pill holds the longest value ("48 to 62% → 9 to 21%") on one line; 64px between the cards and the rows */
.stat-card { grid-template-columns: 272px minmax(0, 1fr) auto; }
.stat-value { font-size: 21px; padding: 14px 16px; }
.tldr + .stats-grid { margin-top: var(--space-4xl); }
@media (max-width: 1000px) { .stat-card { grid-template-columns: 220px minmax(0, 1fr); } .tldr + .stats-grid { margin-top: var(--space-3xl); } }
@media (max-width: 700px) { .stat-card { grid-template-columns: 1fr; } .tldr + .stats-grid { margin-top: var(--space-2xl); } }

/* Stats rows in the same voice as the overview cards above them: 15.5px Roobert captions in the
   cards' grey, values in the article's ink at 20px, tighter rows. */
.stat-caption { font-size: 15.5px; line-height: 1.5; letter-spacing: -0.01em; color: var(--neutral-700); opacity: 1; max-width: 40rem; }
.stat-value { font-size: 20px; color: #101010; min-height: 60px; padding: 12px 16px; }
.stat-card { padding: 20px 0; gap: 0 28px; grid-template-columns: 250px minmax(0, 1fr) auto; }
@media (max-width: 1000px) { .stat-card { grid-template-columns: 210px minmax(0, 1fr); } }
@media (max-width: 700px) { .stat-card { grid-template-columns: 1fr; padding: 16px 0; } .stat-caption { font-size: 15.5px; } .stat-value { min-height: 52px; font-size: 19px; } }

/* Headings and stat values in one colour: no blue accent phrase, no blue arrow. */
.article-body h2 .accent, .article-title .accent { color: inherit; }
.stat-value .arrow { color: inherit; }
/* the one accent that stays: the headline number in the Results heading */
#results > h2 .accent { color: var(--accent-article); }

/* 48px above every section title (between sections, and from the stat rows to the first one) */
.text-block { margin-bottom: var(--space-3xl); }
.article-column #tldr { padding-bottom: var(--space-3xl); }

/* 48px above every sub-heading too, and above the Open source block */
.article-body h3 { margin-top: var(--space-3xl); }
.article-body .tool-card { margin-top: var(--space-3xl); }

/* 48px from the BibTeX contacts to the Decart banner (was 80 + 64) */
#bibtex.home-section { padding-bottom: 0; }
#decart.home-section { padding-top: var(--space-3xl); }

/* ============================================================
   Review 2026-09-09: section titles 26px, sub-headings 22px; the numbered chips above the section
   titles and the "Sections x.y of the paper" pointer lines are back (only the rail's list was to go).
   ============================================================ */
.article-body h2, .tldr-side h3 { font-size: 26px; }
.article-body h3, .tool-card h4 { font-size: 22px; }
.text-block .section-eyebrow { display: inline-flex; margin-bottom: var(--space-md); }
.article-body .section-ref { display: block; }

/* sub-headings: back to 32px above (48 stays for section titles and the Open source block) */
.article-body h3 { margin-top: var(--space-2xl); }
/* a little more air before the Decart banner: 64px */
#decart.home-section { padding-top: var(--space-4xl); }
#decart.home-section { padding-top: var(--space-5xl); } /* 80px before the banner */
#decart.home-section { padding-top: 100px; } /* before the banner */

/* 48px from the nav to the EMNLP line (was 92) */
.article-shell { padding-top: 48px; }

/* Sections 60px apart (the Open source block inside Use it keeps 48, sub-headings 32) */
.text-block { margin-bottom: 60px; }
.article-column #tldr { padding-bottom: 60px; }
/* "What you learn": the blue rule spans only the label and the text */
.callout { padding-top: 0; padding-bottom: 0; }
.callout .eyebrow { display: flex; } /* no line box above the label, so the rule starts at its cap height */
.callout .eyebrow { justify-content: flex-start; }
.article-shell { padding-top: 32px; } /* nav -> meta line */
.article-body h3 { margin-top: var(--space-3xl); } /* 48px above sub-headings */

/* Lab logos sit to the right of Chaim's name in the banner card */
.people-card .person .affil-logos { margin-left: auto; flex: 0 0 auto; flex-wrap: nowrap; gap: 10px; }
.people-card .person .affil-logos img { height: 40px; }
@media (max-width: 560px) {
  .people-card .person { flex-wrap: wrap; }
  .people-card .person .affil-logos { margin-left: 0; flex-basis: 100%; }
}
.people-card .person > div:not(.avatar):not(.affil-logos) { flex: 1 1 0; min-width: 0; } /* name block stays beside the avatar when the logos wrap */
.people-card .person .affil-logos { align-self: flex-start; } /* logos level with the name, not the middle of the block */

/* Meta line: venue and arXiv id are links; underline on hover where there is a pointer */
.article-meta a { color: inherit; text-decoration: none; }
@media (hover: hover) { .article-meta a:hover { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; } }

/* ============================================================
   Phones (<= 700px): headings sized for a 342px column, the simulator caption at caption size,
   and no label below 11px.
   ============================================================ */
@media (max-width: 700px) {
  .article-body h2, .tldr-side h3 { font-size: 24px; line-height: 1.3; }
  .article-body h3, .tool-card h4 { font-size: 21px; line-height: 1.35; }
  #heroDemo > .sim-caption { font-size: 15px; line-height: 1.5; }
  .eyebrow, .quick-links-title, .sim-sri-head .eyebrow, .sim-step, .seg button { font-size: 11px; }
  .sim-legend span, .sim-sri-legend span { font-size: 11.5px; }
  .article-lede, .article-dek { font-size: 17px; }
  .affil-logo-row { gap: 8px; }
  .logo-btn { height: 52px; padding: 8px 12px; }
  .logo-btn img { height: 30px; max-width: 132px; }
  .logo-btn.is-square img { height: 36px; }
  .logo-btn.is-wordmark img { height: 18px; }
}
@media (max-width: 700px) {
  .sim-prompt .eyebrow, .sim-state span, .eq-label, .defense-name small, .site-footer-legal a { font-size: 11px; }
  .hbar-label small, .defense-head span { font-size: 11.5px; }
}
@media (max-width: 900px) {
  .article-meta { align-items: center; } /* the meta line stays centred with the rest of the header */
}
@media (max-width: 700px) {
  .value-points li { justify-items: center; text-align: center; } /* labels and sentences centred like the lede */
}

/* Phones: the quick-links row sits 24px under the header rule and fits on two lines (no icons, compact pills) */
@media (max-width: 900px) {
  .article-main { padding-top: 24px; }
  .quick-links { gap: 8px; padding-bottom: 16px; }
  .quick-links-title { font-size: 11px; letter-spacing: 0.18em; margin: 0 4px 0 0; }
  .quick-links .ql-icon { display: none; }
  .quick-links-list a, .quick-links-share { padding: 8px 14px; font-size: 14px; line-height: 1.3; gap: 0; }
}

/* ============================================================
   Phones, second pass
   ============================================================ */
@media (max-width: 900px) {
  /* quick links keep their icons; compact pills so title + six pills fit two lines at 390px */
  .quick-links { gap: 6px; }
  .quick-links-title { font-size: 11px; letter-spacing: 0.14em; margin: 0 2px 0 0; }
  .quick-links .ql-icon { display: block; flex: 0 0 15px; width: 15px; height: 15px; }
  .quick-links-list a, .quick-links-share { padding: 8px 11px; font-size: 13px; gap: 5px; min-height: 36px; }
  /* segmented controls: one line, scrollable sideways instead of wrapping */
  .seg { flex-wrap: nowrap; overflow-x: auto; max-width: 100%; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .seg::-webkit-scrollbar { display: none; }
  .seg button { flex: 0 0 auto; }
}
@media (max-width: 700px) {
  /* stat rows: label above the value pill, then the caption with more room */
  .stat-card { gap: 10px; }
  .stat-card .eyebrow-badge { order: 1; }
  .stat-value { order: 2; }
  .stat-caption { order: 3; margin-top: 6px; }
}
@media (max-width: 560px) {
  /* banner card: photo left, text right, the two lab logos under the text */
  .people-card .person { display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 12px 16px; align-items: start; }
  .people-card .avatar { align-self: center; }
  .people-card .person .affil-logos { grid-column: 2; margin: 0; flex-basis: auto; }
}

/* Institution logos: wrapped row on desktop (clones hidden); on phones a single line that
   drifts left in a loop, edge to edge, fading out at both ends. */
.affil-logo-track { display: contents; }
.affil-logo-track .logo-btn.is-clone { display: none; }
@media (max-width: 700px) {
  .affil-logo-row { display: block; overflow: hidden; max-width: none; width: 100vw; margin-left: calc(50% - 50vw); padding: 4px 0;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
  .affil-logo-track { display: flex; width: max-content; animation: affil-marquee 28s linear infinite; }
  .affil-logo-track .logo-btn { margin-right: 10px; flex: 0 0 auto; }
  .affil-logo-track .logo-btn.is-clone { display: inline-flex; }
  @keyframes affil-marquee { to { transform: translateX(-50%); } }
  @media (prefers-reduced-motion: reduce) {
    .affil-logo-track { animation: none; }
    .affil-logo-row { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
    .affil-logo-track .logo-btn.is-clone { display: none; }
  }
}
@media (max-width: 900px) {
  /* the chart header must be allowed to shrink, or a wide tab strip pushes it past the card */
  .chart-head, .chart-controls { min-width: 0; max-width: 100%; }
  .chart-controls .seg { min-width: 0; }
}

/* Banner card as a grid: desktop puts the lab logos beside the name row, phones put them last */
.people-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "person logos" "list list"; gap: 18px 16px; align-items: start; }
.people-card .person { grid-area: person; }
.people-card ul { grid-area: list; }
.people-card .affil-logos { grid-area: logos; margin: 0; flex-wrap: nowrap; gap: 10px; }
.people-card .affil-logos img { height: 40px; }
@media (max-width: 560px) {
  .people-card { grid-template-columns: 1fr; grid-template-areas: "person" "list" "logos"; gap: 14px; }
  .people-card .affil-logos { justify-content: flex-start; }
}
@media (max-width: 900px) { .quick-links { padding-bottom: 24px; } } /* pills -> rule, same as rule -> pills above */
@media (max-width: 1100px) { .article-main { row-gap: 24px; } } /* rule under the quick links -> simulator */
@media (max-width: 1100px) { .quick-links { margin-bottom: 0; } } /* the row gap alone sets the 24px */
@media (max-width: 700px) {
  /* value pill hugs the number, sits left */
  .stat-value { justify-self: start; width: auto; min-height: 0; padding: 10px 16px; border-radius: 14px; font-size: 19px; }
}
@media (max-width: 700px) { .stat-caption { margin-top: 0; } } /* same 10px above and below the value pill */
@media (max-width: 700px) { .stat-card { gap: 32px; } } /* label -> pill -> caption */
@media (max-width: 700px) { .stat-card { gap: 24px; } }
@media (max-width: 700px) { .stat-card { gap: 18px; } }
@media (max-width: 700px) { .stat-card { gap: 16px; } }
@media (max-width: 700px) { .stat-card { gap: 14px; } }
.cta-banner > div > p:last-child { margin-bottom: 0; } /* no button row below the banner copy any more */

/* Simulator status pill: first row inside the token panel (as on phones), not astride its top edge */
@media (min-width: 901px) {
  .sim-state { position: static; margin: 0 0 12px; }
}

/* Phones: the header block is left-aligned (desktop and tablets stay centred) */
@media (max-width: 700px) {
  .article-header-main { text-align: left; }
  .article-meta { justify-content: flex-start; align-items: flex-start; }
  .article-title, .article-dek, .value-points { margin-left: 0; margin-right: 0; }
  .value-points li { justify-items: start; text-align: left; }
  .authors { justify-content: flex-start; }
  .affils { align-items: flex-start; text-align: left; }
}

/* Phones: the logo row scrolls sideways by hand and drifts on its own (main.js); no CSS animation */
@media (max-width: 700px) {
  .affil-logo-row { overflow-x: auto; overflow-y: hidden; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .affil-logo-row::-webkit-scrollbar { display: none; }
  .affil-logo-track { animation: none; }
}

/* Page note ("Project page for …") sits above the footer as the last thing on the page; the footer
   itself is the same block as on the other pages. */
.page-note { padding-top: 0; padding-bottom: var(--space-4xl); }
.page-note p { max-width: 978px; font-family: var(--font-body); font-size: 13px; line-height: 1.55; color: var(--neutral-500); }
.page-note a { color: var(--neutral-700); text-decoration: none; border-bottom: 1px solid rgba(0,0,0,0.2); }
.site-footer { margin-top: 0; }
@media (max-width: 900px) { .page-note { padding-bottom: var(--space-3xl); } }

/* The Guard step uses the banner's blue, not navy */
.flow-step.is-accent { background: #1d2c5e; }
.flow-step.is-accent .flow-num { color: #1d2c5e; }

/* Banner copy on phones: same 16px / 1.52 as desktop */
@media (max-width: 900px) { .cta-banner p { font-size: 16px; line-height: 1.52; } }

/* Phones: title 28px, section titles 22px (sub-headings step to 20 to stay a level below) */
@media (max-width: 700px) {
  .article-title { font-size: 28px; line-height: 1.18; }
  .article-body h2, .tldr-side h3 { font-size: 22px; line-height: 1.32; }
  .article-body h3, .tool-card h4 { font-size: 20px; line-height: 1.35; }
}