/* ==========================================================================
   paddleocr.dev — design system
   Dark-first "ink & scan-light" theme. Light theme is a full, selected
   counterpart (not an inversion). Tokens on :root, components below.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --surface-2: #f1f2ef;
  --surface-3: #e8e9e5;
  --border: rgba(12, 16, 24, 0.10);
  --border-strong: rgba(12, 16, 24, 0.18);
  --text: #0c1018;
  --text-2: #444b59;
  --muted: #6c7383;
  --accent: #2357d9;
  --accent-2: #0e8fb3;
  --accent-ink: #ffffff;
  --accent-soft: rgba(35, 87, 217, 0.09);
  --scan: #e2a417;
  --scan-soft: rgba(226, 164, 23, 0.16);
  --good: #0a7d36;
  --warn: #9a6700;
  --bad: #c42b2b;
  --code-bg: #0e131d;
  --code-text: #e6e9f0;
  --code-muted: #8590a6;
  --shadow-sm: 0 1px 2px rgba(12, 16, 24, 0.06);
  --shadow: 0 1px 2px rgba(12, 16, 24, 0.05), 0 8px 24px -8px rgba(12, 16, 24, 0.12);
  --shadow-lg: 0 2px 4px rgba(12, 16, 24, 0.04), 0 24px 60px -18px rgba(12, 16, 24, 0.22);
  --glow: 0 0 0 1px rgba(35, 87, 217, 0.15), 0 10px 40px -10px rgba(35, 87, 217, 0.35);
  --grid-line: rgba(12, 16, 24, 0.045);
  --hero-orb-1: rgba(35, 87, 217, 0.16);
  --hero-orb-2: rgba(14, 143, 179, 0.14);
  --hero-orb-3: rgba(226, 164, 23, 0.10);

  /* chart roles (validated slots; see assets/charts.js) */
  --chart-surface: #ffffff;
  --chart-grid: #e6e6e1;
  --chart-axis: #c3c2b7;
  --chart-ink: #0b0b0b;
  --chart-ink-2: #52514e;
  --chart-muted: #6f6e69;
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --series-3: #1baf7a;
  --series-4: #eda100;
  --series-dim: #c9cbd1;

  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans", "Noto Sans SC", "Noto Sans JP", "Microsoft YaHei", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 26px;
  --container: 1200px;
  --prose: 760px;
  --nav-h: 64px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #06080d;
    --bg-elev: #0b0f17;
    --surface: #0d121b;
    --surface-2: #121926;
    --surface-3: #1a2232;
    --border: rgba(255, 255, 255, 0.075);
    --border-strong: rgba(255, 255, 255, 0.15);
    --text: #eaeef6;
    --text-2: #a9b2c4;
    --muted: #7c869a;
    --accent: #6d9bff;
    --accent-2: #3fd0f0;
    --accent-ink: #06080d;
    --accent-soft: rgba(109, 155, 255, 0.10);
    --scan: #f7bd3d;
    --scan-soft: rgba(247, 189, 61, 0.14);
    --good: #3ccf73;
    --warn: #f2b84b;
    --bad: #ff6b6b;
    --code-bg: #080b12;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 10px 30px -10px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 30px 80px -20px rgba(0, 0, 0, 0.75);
    --glow: 0 0 0 1px rgba(109, 155, 255, 0.22), 0 10px 50px -10px rgba(109, 155, 255, 0.45);
    --grid-line: rgba(255, 255, 255, 0.035);
    --hero-orb-1: rgba(77, 124, 255, 0.28);
    --hero-orb-2: rgba(40, 200, 235, 0.18);
    --hero-orb-3: rgba(247, 189, 61, 0.10);
    --chart-surface: #0d121b;
    --chart-grid: #1f2633;
    --chart-axis: #394255;
    --chart-ink: #f0efec;
    --chart-ink-2: #c3c2b7;
    --chart-muted: #8f97a8;
    --series-1: #3987e5;
    --series-2: #d95926;
    --series-3: #199e70;
    --series-4: #c98500;
    --series-dim: #364055;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #06080d;
  --bg-elev: #0b0f17;
  --surface: #0d121b;
  --surface-2: #121926;
  --surface-3: #1a2232;
  --border: rgba(255, 255, 255, 0.075);
  --border-strong: rgba(255, 255, 255, 0.15);
  --text: #eaeef6;
  --text-2: #a9b2c4;
  --muted: #7c869a;
  --accent: #6d9bff;
  --accent-2: #3fd0f0;
  --accent-ink: #06080d;
  --accent-soft: rgba(109, 155, 255, 0.10);
  --scan: #f7bd3d;
  --scan-soft: rgba(247, 189, 61, 0.14);
  --good: #3ccf73;
  --warn: #f2b84b;
  --bad: #ff6b6b;
  --code-bg: #080b12;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 30px 80px -20px rgba(0, 0, 0, 0.75);
  --glow: 0 0 0 1px rgba(109, 155, 255, 0.22), 0 10px 50px -10px rgba(109, 155, 255, 0.45);
  --grid-line: rgba(255, 255, 255, 0.035);
  --hero-orb-1: rgba(77, 124, 255, 0.28);
  --hero-orb-2: rgba(40, 200, 235, 0.18);
  --hero-orb-3: rgba(247, 189, 61, 0.10);
  --chart-surface: #0d121b;
  --chart-grid: #1f2633;
  --chart-axis: #394255;
  --chart-ink: #f0efec;
  --chart-ink-2: #c3c2b7;
  --chart-muted: #8f97a8;
  --series-1: #3987e5;
  --series-2: #d95926;
  --series-3: #199e70;
  --series-4: #c98500;
  --series-dim: #364055;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
svg { flex-shrink: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 20px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video, canvas { max-width: 100%; }
img { height: auto; display: block; }
a { color: var(--accent); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
::selection { background: var(--scan-soft); color: var(--text); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.025em; margin: 0; font-weight: 650; color: var(--text); }
p { margin: 0 0 1em; }
code, kbd, pre, samp { font-family: var(--font-mono); font-size: 0.9em; }
:not(pre) > code {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.12em 0.4em;
  border-radius: 6px;
  font-size: 0.86em;
  color: var(--text);
  white-space: break-spaces;
  word-break: break-word;
}
kbd { border: 1px solid var(--border-strong); border-bottom-width: 2px; padding: 0.05em 0.4em; border-radius: 5px; font-size: 0.8em; background: var(--surface); }
hr { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 1000; background: var(--accent); color: var(--accent-ink); padding: 10px 16px; border-radius: 10px; font-weight: 600; }
.skip-link:focus { top: 12px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ---------- Background texture ---------- */
.bg-grid {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
}
.bg-orbs { position: absolute; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.bg-orbs span { position: absolute; border-radius: 50%; filter: blur(70px); opacity: 1; animation: orb-drift 22s var(--ease) infinite alternate; }
.bg-orbs span:nth-child(1) { width: 560px; height: 560px; left: -140px; top: -180px; background: var(--hero-orb-1); }
.bg-orbs span:nth-child(2) { width: 480px; height: 480px; right: -120px; top: 40px; background: var(--hero-orb-2); animation-delay: -6s; }
.bg-orbs span:nth-child(3) { width: 380px; height: 380px; left: 40%; top: 320px; background: var(--hero-orb-3); animation-delay: -12s; }
@keyframes orb-drift { 0% { transform: translate(0, 0) scale(1); } 100% { transform: translate(40px, 30px) scale(1.12); } }

/* ---------- Buttons ---------- */
.btn {
  --b-bg: var(--surface);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 18px; border-radius: 12px;
  font: 600 15px/1 var(--font-sans); letter-spacing: -0.01em;
  border: 1px solid var(--border-strong); background: var(--b-bg); color: var(--text);
  cursor: pointer; text-decoration: none !important; white-space: nowrap;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s, border-color .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.btn:active { transform: translateY(0); }
.btn svg { width: 17px; height: 17px; flex: none; }
.btn-primary {
  color: #fff; border-color: transparent;
  background: linear-gradient(135deg, #2f63f0 0%, #1d8fd0 100%);
  box-shadow: 0 1px 0 rgba(255,255,255,.25) inset, 0 8px 24px -8px rgba(47, 99, 240, .65);
}
.btn-primary:hover { box-shadow: 0 1px 0 rgba(255,255,255,.25) inset, 0 14px 34px -10px rgba(47, 99, 240, .8); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { background: var(--surface-2); box-shadow: none; }
.btn-sm { height: 34px; padding: 0 12px; font-size: 13.5px; border-radius: 9px; }
.btn-lg { height: 52px; padding: 0 24px; font-size: 16px; border-radius: 14px; }

/* ---------- Badges / pills ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 8px; border-radius: 999px;
  font-size: 13px; font-weight: 500; color: var(--text-2);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 1px solid var(--border); backdrop-filter: blur(8px);
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--good); box-shadow: 0 0 0 4px color-mix(in srgb, var(--good) 20%, transparent); }
.pill strong { color: var(--text); font-weight: 600; }
.tag {
  display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 9px; border-radius: 7px;
  font: 600 11.5px/1 var(--font-sans); letter-spacing: .02em; text-transform: uppercase;
  background: var(--surface-2); color: var(--text-2); border: 1px solid var(--border);
}
.tag-accent { background: var(--accent-soft); color: var(--accent); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }
.tag-scan { background: var(--scan-soft); color: color-mix(in srgb, var(--scan) 75%, var(--text)); border-color: color-mix(in srgb, var(--scan) 30%, transparent); }
.tag-good { background: color-mix(in srgb, var(--good) 12%, transparent); color: var(--good); border-color: color-mix(in srgb, var(--good) 28%, transparent); }
.tag-bad { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 28%, transparent); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font: 600 12.5px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.eyebrow::before { content: ""; width: 18px; height: 1px; background: currentColor; opacity: .6; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: saturate(160%) blur(16px); -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner { height: 100%; display: flex; align-items: center; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; letter-spacing: -0.02em; font-size: 16.5px; text-decoration: none !important; flex: none; }
.logo-mark { width: 30px; height: 30px; flex: none; }
.logo small { font: 500 12px var(--font-mono); color: var(--muted); letter-spacing: 0; margin-left: -4px; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-left: 8px; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 5px; height: 36px; padding: 0 12px; border-radius: 9px;
  color: var(--text-2); font-size: 14.5px; font-weight: 500; background: none; border: 0; cursor: pointer; font-family: inherit;
  text-decoration: none !important;
}
.nav-link:hover, .nav-item.open > .nav-link, .nav-link[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.nav-link svg { width: 12px; height: 12px; opacity: .6; transition: transform .2s; }
.nav-item.open > .nav-link svg { transform: rotate(180deg); }
.nav-menu {
  position: absolute; top: calc(100% + 10px); left: -10px; min-width: 560px;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow-lg);
  padding: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
  opacity: 0; visibility: hidden; transform: translateY(-6px) scale(.98); transform-origin: top left;
  transition: opacity .18s, transform .22s var(--ease), visibility .18s;
}
.nav-menu.narrow { min-width: 340px; grid-template-columns: 1fr; }
.nav-item.open .nav-menu { opacity: 1; visibility: visible; transform: none; }
.nav-menu a {
  display: grid; grid-template-columns: 34px 1fr; gap: 2px 12px; align-items: center;
  padding: 10px 12px; border-radius: 12px; color: var(--text); text-decoration: none !important;
}
.nav-menu a:hover { background: var(--surface-2); }
.nav-menu .mi-icon { grid-row: span 2; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.nav-menu .mi-icon svg { width: 17px; height: 17px; }
.nav-menu .mi-title { font-weight: 600; font-size: 14px; line-height: 1.2; }
.nav-menu .mi-desc { font-size: 12.5px; color: var(--muted); line-height: 1.35; }
.nav-spacer { flex: 1; }
.nav-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; display: inline-grid; place-items: center;
  background: none; border: 1px solid transparent; color: var(--text-2); cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-btn .i-sun { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
:root[data-theme="dark"] .theme-btn .i-moon { display: none; }
.lang-sel { position: relative; }
.lang-sel .nav-menu { left: auto; right: 0; min-width: 180px; grid-template-columns: 1fr; transform-origin: top right; }
.lang-sel .nav-menu a { display: flex; justify-content: space-between; font-size: 14px; }
.lang-sel .nav-menu a[aria-current="true"]::after { content: "✓"; color: var(--accent); }
.burger { display: none; }
.mobile-panel { display: none; }
@media (max-width: 1020px) {
  .nav-links, .nav-cta { display: none; }
  .burger { display: inline-grid; }
  .mobile-panel {
    display: block; position: fixed; inset: var(--nav-h) 0 0 0; z-index: 99; background: var(--bg);
    padding: 16px 16px 40px; overflow-y: auto; transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .2s, transform .25s var(--ease), visibility .2s;
  }
  .mobile-panel.open { opacity: 1; transform: none; visibility: visible; }
  .mobile-panel h4 { font: 600 11.5px var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 22px 4px 8px; }
  .mobile-panel a { display: block; padding: 11px 12px; border-radius: 10px; color: var(--text); font-weight: 500; text-decoration: none; }
  .mobile-panel a:hover { background: var(--surface-2); }
  .mobile-panel .btn { display: flex; margin-top: 18px; }
}
@media (max-width: 480px) { .logo small { display: none; } }

/* ---------- Home hero ---------- */
.hero { position: relative; padding: 72px 0 40px; overflow: hidden; isolation: isolate; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.02fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(40px, 6.2vw, 74px); font-weight: 700; letter-spacing: -0.045em; line-height: 1.0; margin: 18px 0 22px; }
.hero h1 .grad {
  background: linear-gradient(100deg, var(--accent) 10%, var(--accent-2) 55%, var(--scan) 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% 100%; animation: grad-pan 8s ease-in-out infinite alternate;
}
@keyframes grad-pan { to { background-position: 100% 0; } }
.hero-lede { font-size: clamp(17px, 1.6vw, 19.5px); color: var(--text-2); max-width: 560px; line-height: 1.6; margin-bottom: 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 30px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--muted); font-size: 13.5px; }
.hero-proof span { display: inline-flex; align-items: center; gap: 7px; }
.hero-proof svg { width: 15px; height: 15px; color: var(--good); }
@media (max-width: 980px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero { padding-top: 44px; } }

/* Scan stage: the signature animation */
.scan-stage { position: relative; perspective: 1400px; }
.scan-card {
  position: relative; border-radius: 22px; background: var(--bg-elev); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg); overflow: hidden; transform-style: preserve-3d;
  transition: transform .5s var(--ease);
}
.scan-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 55%, transparent), transparent 35%, transparent 65%, color-mix(in srgb, var(--scan) 50%, transparent));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
}
.scan-top { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); font: 500 12.5px var(--font-mono); color: var(--muted); }
.scan-top .dots { display: flex; gap: 6px; }
.scan-top .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--surface-3); }
.scan-top .status { margin-left: auto; display: inline-flex; align-items: center; gap: 7px; color: var(--text-2); }
.scan-top .status i { width: 7px; height: 7px; border-radius: 50%; background: var(--scan); box-shadow: 0 0 10px var(--scan); animation: blink 1.2s steps(2) infinite; }
.scan-top .status.done i { background: var(--good); box-shadow: 0 0 10px var(--good); animation: none; }
@keyframes blink { 50% { opacity: .25; } }
.scan-body { display: grid; grid-template-columns: 1.05fr 1fr; min-height: 380px; }
.scan-doc { position: relative; padding: 18px; border-right: 1px solid var(--border); background: var(--surface-2); }
.scan-doc-inner { position: relative; border-radius: 10px; overflow: hidden; background: #fff; box-shadow: 0 6px 20px -8px rgba(0,0,0,.35); }
.scan-doc-inner img { width: 100%; }
.scan-doc svg.ov { position: absolute; inset: 0; width: 100%; height: 100%; }
.ov polygon { fill: rgba(247, 189, 61, 0.10); stroke: #e5a50a; stroke-width: 2; vector-effect: non-scaling-stroke; opacity: 0; transition: opacity .25s; }
.ov polygon.on { opacity: 1; }
.ov polygon.hl { fill: rgba(47, 99, 240, .16); stroke: #2f63f0; }
.scan-line {
  position: absolute; left: 0; right: 0; height: 64px; top: -64px; pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(63, 208, 240, .18) 70%, rgba(63, 208, 240, .9) 98%, transparent);
  mix-blend-mode: multiply; opacity: 0;
}
.scan-line.run { animation: scan-sweep 2.4s var(--ease) forwards; opacity: 1; }
@keyframes scan-sweep { 0% { top: -64px; } 100% { top: 100%; } }
.scan-out { position: relative; padding: 0; background: var(--code-bg); color: var(--code-text); font: 12.5px/1.65 var(--font-mono); overflow: hidden; }
.scan-out-tabs { display: flex; gap: 2px; padding: 10px 12px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
.scan-out-tabs button { background: none; border: 0; color: var(--code-muted); font: 500 12px var(--font-mono); padding: 7px 10px 9px; cursor: pointer; border-bottom: 2px solid transparent; }
.scan-out-tabs button.active { color: #fff; border-bottom-color: #f7bd3d; }
.scan-out pre { margin: 0; padding: 14px 16px; white-space: pre-wrap; word-break: break-word; max-height: 330px; overflow: hidden; }
.scan-out .k { color: #8ab4ff; } .scan-out .s { color: #a5e3a1; } .scan-out .n { color: #f7bd3d; } .scan-out .c { color: #6f7a90; }
.scan-out .caret { display: inline-block; width: 7px; height: 14px; background: #f7bd3d; vertical-align: -2px; animation: blink 1s steps(2) infinite; }
.scan-foot { display: flex; flex-wrap: wrap; gap: 8px 16px; padding: 11px 16px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
.scan-foot b { color: var(--text); font-weight: 600; font-variant-numeric: tabular-nums; }
@media (max-width: 640px) { .scan-body { grid-template-columns: 1fr; } .scan-doc { border-right: 0; border-bottom: 1px solid var(--border); } .scan-out pre { max-height: 220px; } }

/* ---------- Sections ---------- */
.section { position: relative; padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-alt { background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--surface-2) 60%, transparent) 20%, color-mix(in srgb, var(--surface-2) 60%, transparent) 80%, transparent); }
.section-head { max-width: 760px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -0.035em; margin-bottom: 14px; }
.section-head p { color: var(--text-2); font-size: 17.5px; margin: 0; }
@media (max-width: 640px) { .section { padding: 64px 0; } }

/* ---------- Cards ---------- */
.card {
  position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card.spot { overflow: hidden; }
.card.spot::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--accent) 12%, transparent), transparent 45%);
}
.card.spot:hover::after { opacity: 1; }
a.card { color: inherit; text-decoration: none !important; display: block; }
a.card:hover, .card.lift:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.card h3 { font-size: 18.5px; margin-bottom: 8px; letter-spacing: -0.02em; }
.card p { color: var(--text-2); font-size: 15px; margin: 0; }
.card .card-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px; background: var(--accent-soft); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent); }
.card .card-icon svg { width: 21px; height: 21px; }
.card .card-arrow { position: absolute; top: 22px; right: 22px; color: var(--muted); transition: transform .3s var(--ease), color .3s; }
a.card:hover .card-arrow { transform: translate(3px, -3px); color: var(--accent); }
.card .card-meta { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* bento */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.bento > * { grid-column: span 2; }
.bento > .w3 { grid-column: span 3; }
.bento > .w4 { grid-column: span 4; }
.bento > .w6 { grid-column: span 6; }
@media (max-width: 980px) { .bento > *, .bento > .w3, .bento > .w4 { grid-column: span 3; } }
@media (max-width: 640px) { .bento { grid-template-columns: 1fr; } .bento > *, .bento > .w3, .bento > .w4, .bento > .w6 { grid-column: auto; } }

/* stat tiles */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.stat { background: var(--surface); padding: 22px 22px 20px; }
.stat-label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.stat-value { font-size: clamp(28px, 3.2vw, 38px); font-weight: 650; letter-spacing: -0.035em; line-height: 1.1; }
.stat-note { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.stat-note a { color: inherit; text-decoration: underline; text-decoration-color: var(--border-strong); }
@media (max-width: 860px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { position: relative; padding: 52px 0 36px; overflow: hidden; isolation: isolate; border-bottom: 1px solid var(--border); }
.page-hero .bg-orbs span:nth-child(1) { width: 420px; height: 420px; top: -240px; }
.page-hero .bg-orbs span:nth-child(2) { width: 360px; height: 360px; top: -200px; }
.page-hero .bg-orbs span:nth-child(3) { display: none; }
.page-hero .container { position: relative; z-index: 1; }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--text); }
.crumbs span[aria-hidden] { opacity: .5; }
.page-hero h1 { font-size: clamp(34px, 4.8vw, 56px); font-weight: 700; letter-spacing: -0.04em; max-width: 920px; margin-bottom: 16px; }
.page-hero .lede { font-size: clamp(17px, 1.5vw, 19px); color: var(--text-2); max-width: 780px; margin: 0 0 22px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--muted); align-items: center; }
.meta-row span { display: inline-flex; align-items: center; gap: 6px; }
.meta-row svg { width: 14px; height: 14px; }
.meta-row .verified { color: var(--good); font-weight: 500; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

/* ---------- Docs layout ---------- */
.doc-layout { display: grid; grid-template-columns: 236px minmax(0, 1fr) 210px; gap: 48px; padding-top: 40px; padding-bottom: 80px; align-items: start; }
.doc-layout.no-toc { grid-template-columns: 236px minmax(0, 1fr); }
.doc-side { position: sticky; top: calc(var(--nav-h) + 24px); max-height: calc(100vh - var(--nav-h) - 48px); overflow-y: auto; padding-right: 6px; scrollbar-width: thin; }
.doc-side h5 { font: 600 11px var(--font-mono); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin: 20px 10px 8px; }
.doc-side h5:first-child { margin-top: 0; }
.doc-side a { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 8px; color: var(--text-2); font-size: 14px; line-height: 1.35; text-decoration: none; }
.doc-side a:hover { background: var(--surface-2); color: var(--text); }
.doc-side a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.doc-side a .tool-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--scan); flex: none; }
.toc { position: sticky; top: calc(var(--nav-h) + 24px); max-height: calc(100vh - var(--nav-h) - 48px); overflow-y: auto; font-size: 13.5px; }
.toc h5 { font: 600 11px var(--font-mono); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin: 0 0 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc li a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; color: var(--muted); border-left: 1px solid transparent; line-height: 1.35; text-decoration: none; }
.toc li a:hover { color: var(--text); }
.toc li a.active { color: var(--accent); border-left-color: var(--accent); }
.toc li.l3 a { padding-left: 26px; font-size: 13px; }
.toc .toc-extra { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--border); display: grid; gap: 8px; }
.toc .toc-extra a { color: var(--text-2); font-size: 13px; display: inline-flex; gap: 6px; align-items: center; }
.reading-bar { position: fixed; top: var(--nav-h); left: 0; height: 2px; width: 0; z-index: 101; background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--scan)); transition: width .1s linear; }
@media (max-width: 1200px) { .doc-layout { grid-template-columns: 220px minmax(0, 1fr); } .toc { display: none; } }
@media (max-width: 900px) {
  .doc-layout, .doc-layout.no-toc { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 24px; }
  .doc-side { display: none; }
}
.mobile-toc { display: none; margin-bottom: 28px; }
@media (max-width: 1200px) {
  .mobile-toc { display: block; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
  .mobile-toc summary { padding: 12px 16px; cursor: pointer; font-weight: 600; font-size: 14px; list-style: none; display: flex; justify-content: space-between; }
  .mobile-toc summary::-webkit-details-marker { display: none; }
  .mobile-toc ol { margin: 0; padding: 0 16px 14px 32px; font-size: 14px; }
  .mobile-toc li { margin: 4px 0; }
}

/* ---------- Prose ---------- */
.prose { max-width: var(--prose); font-size: 16.5px; }
.prose.wide { max-width: none; }
.prose > * + * { margin-top: 0; }
.prose h2 { font-size: clamp(25px, 2.6vw, 31px); letter-spacing: -0.03em; margin: 64px 0 16px; padding-top: 4px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 20px; letter-spacing: -0.02em; margin: 38px 0 12px; }
.prose h4 { font-size: 16.5px; margin: 26px 0 8px; }
.prose p, .prose ul, .prose ol { color: var(--text-2); }
.prose p strong, .prose li strong { color: var(--text); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin: 0.4em 0; }
.prose li::marker { color: var(--muted); }
.prose .anchor { margin-left: 8px; color: var(--muted); opacity: 0; text-decoration: none; font-weight: 400; transition: opacity .2s; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }
.prose blockquote { margin: 1.4em 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--border-strong); color: var(--text-2); }
.prose figure { margin: 28px 0; }
.prose figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }
.lead-answer {
  font-size: 17.5px; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--accent); padding: 18px 22px; border-radius: var(--radius); margin-bottom: 32px;
}
.lead-answer p:last-child { margin-bottom: 0; }
.lead-answer p { color: var(--text); }

/* callouts */
.callout { display: grid; grid-template-columns: 22px 1fr; gap: 12px; padding: 15px 18px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); margin: 22px 0; font-size: 15px; }
.callout > svg { width: 20px; height: 20px; margin-top: 2px; color: var(--accent); }
.callout p { margin: 0 0 .5em; color: var(--text-2); }
.callout p:last-child { margin: 0; }
.callout strong { color: var(--text); }
.callout.warn { background: color-mix(in srgb, var(--warn) 7%, var(--surface)); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.callout.warn > svg { color: var(--warn); }
.callout.bad { background: color-mix(in srgb, var(--bad) 6%, var(--surface)); border-color: color-mix(in srgb, var(--bad) 28%, transparent); }
.callout.bad > svg { color: var(--bad); }
.callout.good { background: color-mix(in srgb, var(--good) 6%, var(--surface)); border-color: color-mix(in srgb, var(--good) 28%, transparent); }
.callout.good > svg { color: var(--good); }

/* ---------- Code blocks ---------- */
.code {
  position: relative; margin: 20px 0 26px; border-radius: var(--radius); background: var(--code-bg); color: var(--code-text);
  border: 1px solid rgba(255,255,255,.07); box-shadow: var(--shadow-sm); overflow: hidden;
}
.code-head { display: flex; align-items: center; gap: 10px; padding: 0 8px 0 14px; height: 40px; border-bottom: 1px solid rgba(255,255,255,.06); font: 500 12px var(--font-mono); color: var(--code-muted); }
.code-head .lang { text-transform: uppercase; letter-spacing: .06em; }
.code-head .title { color: #c8cfdc; }
.code-tabs { display: flex; gap: 2px; height: 100%; }
.code-tabs button { background: none; border: 0; border-bottom: 2px solid transparent; color: var(--code-muted); font: 500 12.5px var(--font-mono); padding: 0 10px; cursor: pointer; height: 100%; }
.code-tabs button.active { color: #fff; border-bottom-color: var(--scan); }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font: 13.6px/1.7 var(--font-mono); tab-size: 4; scrollbar-width: thin; }
.code pre code { font: inherit; background: none; border: 0; padding: 0; color: inherit; white-space: pre; }
.code .pane { display: none; }
.code .pane.active { display: block; }
.copy {
  margin-left: auto; display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 10px; border-radius: 7px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); color: #c8cfdc; font: 500 12px var(--font-sans); cursor: pointer;
}
.copy:hover { background: rgba(255,255,255,.12); color: #fff; }
.copy.done { color: #7ee2a0; border-color: rgba(126,226,160,.4); }
.copy svg { width: 13px; height: 13px; }
/* syntax tokens (applied by site.js highlighter) */
.tk-k { color: #ff8fb1; } .tk-s { color: #a5e3a1; } .tk-c { color: #6f7a90; font-style: italic; } .tk-n { color: #f7bd3d; }
.tk-f { color: #8ab4ff; } .tk-b { color: #ffb86b; } .tk-p { color: #7fdbca; } .tk-o { color: #c8cfdc; }
.code .cmd-prompt { color: #6f7a90; user-select: none; }
.cmd-line { display: flex; align-items: center; gap: 8px; background: var(--code-bg); color: var(--code-text); border-radius: 10px; padding: 6px 6px 6px 14px; font: 13px var(--font-mono); border: 1px solid rgba(255,255,255,.07); margin: 8px 0; }
.cmd-line code { background: none !important; border: 0 !important; color: inherit !important; padding: 0 !important; flex: 1; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }

/* ---------- Tables ---------- */
.table-wrap { margin: 22px 0 28px; border: 1px solid var(--border); border-radius: var(--radius); overflow-x: auto; background: var(--surface); scrollbar-width: thin; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 11px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
thead th { background: var(--surface-2); font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; position: sticky; top: 0; white-space: nowrap; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody tr:hover { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
tbody th { font-weight: 600; color: var(--text); }
td { color: var(--text-2); }
td code { white-space: normal; overflow-wrap: anywhere; }
.table-wrap .hl, .table-wrap td.hl { background: var(--accent-soft); color: var(--text); }
.yes { color: var(--good); font-weight: 600; }
.no { color: var(--muted); }
.part { color: var(--warn); font-weight: 600; }

/* ---------- Charts ---------- */
.chart-card { margin: 28px 0; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--chart-surface); padding: 22px 22px 16px; position: relative; }
.chart-card h3, .chart-card .chart-title { font-size: 16.5px; margin: 0 0 4px; letter-spacing: -0.015em; color: var(--text); font-weight: 650; }
.chart-card .chart-sub { font-size: 13.5px; color: var(--muted); margin: 0 0 18px; }
.chart-tools { position: absolute; top: 16px; right: 16px; display: flex; gap: 6px; }
.chart-tools button { height: 28px; padding: 0 10px; border-radius: 7px; border: 1px solid var(--border); background: var(--surface); color: var(--text-2); font: 500 12px var(--font-sans); cursor: pointer; }
.chart-tools button:hover, .chart-tools button[aria-pressed="true"] { background: var(--surface-2); color: var(--text); }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; font-family: var(--font-sans); }
.chart .grid-l { stroke: var(--chart-grid); stroke-width: 1; shape-rendering: crispEdges; }
.chart .axis-l { stroke: var(--chart-axis); stroke-width: 1; shape-rendering: crispEdges; }
.chart .tick { fill: var(--chart-muted); font-size: 11.5px; font-variant-numeric: tabular-nums; }
.chart .cat { fill: var(--chart-ink-2); font-size: 12.5px; }
.chart .val { fill: var(--chart-ink); font-size: 12px; font-weight: 600; font-variant-numeric: tabular-nums; }
.chart .ann { fill: var(--chart-muted); font-size: 11.5px; }
.chart .mark { transition: opacity .2s; }
.chart .mark.dim { opacity: .28; }
.chart .hit { fill: transparent; cursor: default; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 0 0 14px; font-size: 13px; color: var(--chart-ink-2); }
.chart-legend span { display: inline-flex; align-items: center; gap: 7px; }
.chart-legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.chart-src { font-size: 12.5px; color: var(--muted); margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border); }
.chart-src a { color: var(--muted); text-decoration: underline; text-decoration-color: var(--border-strong); }
.chart-table { display: none; margin-top: 8px; }
.chart-card.show-table .chart-table { display: block; }
.chart-card.show-table .chart { display: none; }
.viz-tip {
  position: fixed; z-index: 500; pointer-events: none; min-width: 140px; max-width: 280px;
  background: var(--bg-elev); color: var(--text); border: 1px solid var(--border-strong); border-radius: 10px; box-shadow: var(--shadow-lg);
  padding: 10px 12px; font-size: 13px; line-height: 1.45; opacity: 0; transform: translateY(4px); transition: opacity .12s, transform .12s;
}
.viz-tip.on { opacity: 1; transform: none; }
.viz-tip .t-title { font-weight: 650; margin-bottom: 4px; }
.viz-tip .t-row { display: flex; justify-content: space-between; gap: 14px; color: var(--text-2); }
.viz-tip .t-row b { color: var(--text); font-variant-numeric: tabular-nums; font-weight: 600; }
.viz-tip .t-note { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* ---------- Steps / timeline ---------- */
.steps { counter-reset: step; list-style: none; padding: 0 !important; margin: 26px 0; }
.steps > li { position: relative; padding: 0 0 26px 54px; margin: 0; }
.steps > li::before {
  counter-increment: step; content: counter(step); position: absolute; left: 0; top: -2px; width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; font: 600 14px var(--font-mono); color: var(--accent); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.steps > li::after { content: ""; position: absolute; left: 17px; top: 38px; bottom: 4px; width: 1px; background: var(--border); }
.steps > li:last-child::after { display: none; }
.steps > li > h3, .steps > li > h4 { margin-top: 2px !important; }
.timeline { position: relative; list-style: none; margin: 24px 0; padding: 0 0 0 26px !important; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--accent), var(--accent-2), var(--scan)); border-radius: 2px; opacity: .5; }
.timeline li { position: relative; margin: 0 0 22px !important; }
.timeline li::before { content: ""; position: absolute; left: -26px; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 3px solid var(--accent); }
.timeline li.major::before { border-color: var(--scan); box-shadow: 0 0 0 4px var(--scan-soft); }
.timeline time { font: 600 12.5px var(--font-mono); color: var(--muted); display: block; }
.timeline strong { color: var(--text); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--border); margin: 18px 0; }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary { list-style: none; cursor: pointer; padding: 18px 40px 18px 0; position: relative; font-weight: 600; font-size: 16.5px; color: var(--text); letter-spacing: -0.01em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 10px; height: 10px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: translateY(-70%) rotate(45deg); transition: transform .25s var(--ease); }
.faq details[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq .faq-a { padding: 0 0 20px; color: var(--text-2); }
.faq .faq-a p:last-child { margin-bottom: 0; }

/* ---------- Sources ---------- */
.sources { margin-top: 56px; padding: 22px 24px; border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); font-size: 14px; }
.sources h2 { font-size: 17px !important; margin: 0 0 10px !important; display: flex; align-items: center; gap: 8px; }
.sources ol { margin: 0; padding-left: 1.3em; color: var(--text-2); }
.sources li { margin: 6px 0; word-break: break-word; }
sup.ref a { font: 600 10.5px var(--font-mono); padding: 0 3px; border-radius: 4px; background: var(--accent-soft); text-decoration: none; margin-left: 1px; }
.page-updated { margin-top: 28px; font-size: 13.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 14px; }
.feedback { margin-top: 28px; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; padding: 16px 20px; border-radius: var(--radius); background: var(--surface-2); font-size: 14.5px; color: var(--text-2); }
.feedback a { font-weight: 600; }
.feedback > svg { color: var(--accent); }
.sources h2 svg { color: var(--accent); }
.meta-row svg, .crumbs svg { width: 14px; height: 14px; }

/* next/prev */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 48px; }
.pager a { display: block; padding: 16px 18px; border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); text-decoration: none; background: var(--surface); transition: border-color .2s, transform .2s var(--ease); }
.pager a:hover { border-color: var(--accent); transform: translateY(-2px); }
.pager small { display: block; color: var(--muted); font-size: 12.5px; margin-bottom: 3px; }
.pager .next { text-align: right; grid-column: 2; }
@media (max-width: 640px) { .pager { grid-template-columns: 1fr; } .pager .next { grid-column: auto; } }

/* ---------- Tool UI ---------- */
.tool { border: 1px solid var(--border); border-radius: var(--radius-xl); background: var(--surface); box-shadow: var(--shadow); overflow: hidden; margin: 24px 0 36px; }
.tool-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; padding: 16px 20px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--surface-2) 60%, var(--surface)); }
.tool-head > svg { color: var(--accent); }
.tool-head h2, .tool-head h3 { font-size: 16px !important; margin: 0 !important; letter-spacing: -0.01em; }
.tool-head .tag { margin-left: auto; }
.tool-body { padding: 20px; }
.tool-cols { display: grid; grid-template-columns: 340px minmax(0, 1fr); }
.tool-cols > :first-child { border-right: 1px solid var(--border); }
@media (max-width: 900px) { .tool-cols { grid-template-columns: 1fr; } .tool-cols > :first-child { border-right: 0; border-bottom: 1px solid var(--border); } }
.field { margin-bottom: 16px; }
.field > label, .field-label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 7px; }
.field .hint { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
select, input[type="text"], input[type="search"], input[type="number"], textarea {
  width: 100%; font: 14.5px var(--font-sans); color: var(--text); background: var(--bg); border: 1px solid var(--border-strong);
  border-radius: 10px; padding: 10px 12px; transition: border-color .2s, box-shadow .2s;
}
select { appearance: none; padding-right: 34px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%237c869a' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; }
textarea { font-family: var(--font-mono); font-size: 13px; line-height: 1.6; resize: vertical; min-height: 220px; }
select:focus, input:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; }
.seg button, .seg label { border: 0; background: none; color: var(--text-2); font: 500 13.5px var(--font-sans); padding: 7px 12px; border-radius: 9px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.seg button[aria-pressed="true"], .seg input:checked + span { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { padding: 0; }
.seg label span { padding: 7px 12px; border-radius: 9px; }
.seg.block { display: flex; }
.seg.block > * { flex: 1; justify-content: center; }
.check { display: flex; align-items: flex-start; gap: 10px; padding: 8px 0; font-size: 14px; color: var(--text-2); cursor: pointer; }
.check input { width: 17px; height: 17px; accent-color: var(--accent); margin-top: 2px; flex: none; }
.check b { color: var(--text); font-weight: 600; }
.out-notes { display: grid; gap: 8px; margin-bottom: 14px; }
.out-note { display: flex; gap: 10px; font-size: 13.5px; padding: 10px 12px; border-radius: 10px; background: var(--accent-soft); color: var(--text-2); }
.out-note.warn { background: color-mix(in srgb, var(--warn) 10%, transparent); }
.out-note svg { width: 16px; height: 16px; flex: none; margin-top: 2px; color: var(--accent); }
.out-note.warn svg { color: var(--warn); }

/* dropzone + OCR tool */
.dropzone {
  position: relative; border: 2px dashed var(--border-strong); border-radius: var(--radius-lg); padding: 36px 20px; text-align: center; cursor: pointer;
  background: repeating-linear-gradient(135deg, transparent 0 12px, color-mix(in srgb, var(--surface-2) 50%, transparent) 12px 13px);
  transition: border-color .2s, background-color .2s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background-color: var(--accent-soft); }
.dropzone svg { width: 40px; height: 40px; color: var(--accent); margin: 0 auto 12px; }
.dropzone strong { display: block; font-size: 16px; color: var(--text); margin-bottom: 4px; }
.dropzone span { font-size: 13.5px; color: var(--muted); }
.dropzone input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.samples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; align-items: center; font-size: 13px; color: var(--muted); }
.samples button { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border); background: var(--surface); border-radius: 10px; padding: 4px 10px 4px 4px; font: 500 13px var(--font-sans); color: var(--text-2); cursor: pointer; }
.samples button:hover { border-color: var(--accent); color: var(--text); }
.samples img { width: 30px; height: 30px; object-fit: cover; border-radius: 6px; }
.progress { height: 6px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: inherit; transition: width .25s; }
.progress.indet i { width: 40%; animation: indet 1.2s ease-in-out infinite; }
@keyframes indet { 0% { transform: translateX(-100%); } 100% { transform: translateX(260%); } }
.ocr-stage { position: relative; border-radius: var(--radius); overflow: hidden; background: var(--surface-2); border: 1px solid var(--border); min-height: 240px; display: grid; place-items: center; }
.ocr-stage canvas, .ocr-stage img { max-height: 620px; width: auto; max-width: 100%; }
.ocr-stage svg.ov { position: absolute; }
.ocr-lines { list-style: none; margin: 0; padding: 0; max-height: 520px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.ocr-lines li { display: grid; grid-template-columns: 30px 1fr auto; gap: 10px; align-items: baseline; padding: 9px 12px; border-bottom: 1px solid var(--border); font-size: 14px; cursor: default; }
.ocr-lines li:last-child { border-bottom: 0; }
.ocr-lines li:hover, .ocr-lines li.hl { background: var(--accent-soft); }
.ocr-lines .idx { font: 500 11.5px var(--font-mono); color: var(--muted); }
.ocr-lines .txt { color: var(--text); word-break: break-word; }
.ocr-lines .sc { font: 500 12px var(--font-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.ocr-lines .sc.low { color: var(--bad); }
.metric-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 14px 0; }
.metric-row div { background: var(--surface); padding: 10px 12px; }
.metric-row small { display: block; font-size: 11.5px; color: var(--muted); }
.metric-row b { font-size: 17px; font-variant-numeric: tabular-nums; }
@media (max-width: 640px) { .metric-row { grid-template-columns: repeat(2, 1fr); } }

/* results list (search tools) */
.result-list { display: grid; gap: 10px; }
.result { border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; background: var(--surface); }
.result h4 { margin: 0 0 6px; font-size: 15.5px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.result p { margin: 0 0 8px; font-size: 14px; color: var(--text-2); }
.result ol { margin: 6px 0 0; padding-left: 1.2em; font-size: 14px; color: var(--text-2); }
.empty { padding: 26px; text-align: center; color: var(--muted); font-size: 14.5px; }

/* diff view */
.diff { font: 13px/1.65 var(--font-mono); }
.diff .del { background: rgba(255, 107, 107, .14); color: #ffb3b3; display: block; }
.diff .add { background: rgba(60, 207, 115, .14); color: #a9f0c3; display: block; }

/* chooser (decision) */
.chooser { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .chooser { grid-template-columns: 1fr; } }
.choice { border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; background: var(--surface); position: relative; overflow: hidden; }
.choice::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--c, var(--accent)); }
.choice h3 { font-size: 19px; margin: 8px 0 6px; }
.choice .when { font-size: 14.5px; color: var(--text-2); margin-bottom: 14px; }
.choice ul { list-style: none; padding: 0; margin: 0 0 16px; font-size: 14px; color: var(--text-2); }
.choice li { padding: 5px 0 5px 22px; position: relative; }
.choice li::before { content: ""; position: absolute; left: 2px; top: 12px; width: 10px; height: 6px; border-left: 2px solid var(--good); border-bottom: 2px solid var(--good); transform: rotate(-45deg); }
.choice code { font-size: 12.5px; }

/* marquee */
.marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; gap: 12px; width: max-content; animation: marquee 50s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { white-space: nowrap; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 14px; color: var(--text-2); }
.marquee-track span b { color: var(--text); font-weight: 600; margin-right: 6px; font-family: var(--font-mono); font-size: 12.5px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* pipeline flow diagram */
.flow { display: flex; align-items: stretch; gap: 0; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: thin; }
.flow-node { flex: 1 0 150px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 14px; position: relative; }
.flow-node small { display: block; font: 600 10.5px var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.flow-node strong { display: block; font-size: 14.5px; margin-bottom: 4px; }
.flow-node span { font-size: 12.5px; color: var(--text-2); display: block; line-height: 1.45; }
.flow-node.opt { border-style: dashed; }
.flow-arrow { flex: 0 0 34px; display: grid; place-items: center; color: var(--muted); }
.flow-arrow svg { width: 20px; height: 20px; }
.flow-arrow .pulse { animation: flow-pulse 1.8s ease-in-out infinite; }
@keyframes flow-pulse { 0%, 100% { opacity: .35; transform: translateX(-2px); } 50% { opacity: 1; transform: translateX(2px); } }

/* CTA band */
.cta-band { position: relative; overflow: hidden; isolation: isolate; border-radius: var(--radius-xl); padding: 56px 40px; text-align: center; border: 1px solid var(--border); background: radial-gradient(120% 140% at 50% 0%, color-mix(in srgb, var(--accent) 16%, var(--surface)) 0%, var(--surface) 60%); }
.cta-band h2 { font-size: clamp(28px, 3.6vw, 42px); letter-spacing: -0.035em; margin-bottom: 12px; }
.cta-band p { color: var(--text-2); max-width: 620px; margin: 0 auto 26px; font-size: 17px; }
.cta-band .hero-cta { justify-content: center; margin: 0; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 64px 0 36px; margin-top: 40px; font-size: 14px; background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--surface-2) 50%, transparent)); }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 32px; }
.footer h4 { font: 600 11.5px var(--font-mono); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin-bottom: 14px; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin: 0 0 9px; }
.footer a { color: var(--text-2); }
.footer a:hover { color: var(--text); }
.footer .brand-col p { color: var(--text-2); margin: 14px 0 16px; max-width: 320px; }
.footer .mail { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text); }
.footer-bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; color: var(--muted); font-size: 13px; }
.footer-bottom p { margin: 0; max-width: 820px; }
@media (max-width: 980px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer .brand-col { grid-column: 1 / -1; } }

/* ---------- Ads (collapse when empty) ---------- */
.ad-slot { margin: 32px auto; }
.ad-slot:empty { display: none; }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; } .reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }
html.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}
@media print {
  .nav, .footer, .doc-side, .toc, .reading-bar, .ad-slot, .copy, .chart-tools, .mobile-toc, .bg-orbs, .bg-grid { display: none !important; }
  body { background: #fff; color: #000; }
  .doc-layout { display: block; }
}
@media (forced-colors: active) {
  .btn-primary { border: 1px solid ButtonText; }
  .chart .mark { forced-color-adjust: none; }
}

/* utilities */
.muted { color: var(--muted); }
.mt-0 { margin-top: 0 !important; } .mb-0 { margin-bottom: 0 !important; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.mono { font-family: var(--font-mono); }
.small { font-size: 13.5px; }
.flex { display: flex; } .gap { gap: 10px; } .wrap { flex-wrap: wrap; } .items-center { align-items: center; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }

/* ---------- Online OCR tool ---------- */
.ocr-app { display: grid; grid-template-columns: 320px minmax(0, 1fr); }
.ocr-app > aside { border-right: 1px solid var(--border); padding: 20px; display: flex; flex-direction: column; gap: 16px; background: color-mix(in srgb, var(--surface-2) 40%, var(--surface)); }
.ocr-app > section { padding: 20px; min-width: 0; }
@media (max-width: 960px) { .ocr-app { grid-template-columns: 1fr; } .ocr-app > aside { border-right: 0; border-bottom: 1px solid var(--border); } }
.ocr-status { display: grid; gap: 8px; }
.ocr-status p { margin: 0; font-size: 13px; color: var(--text-2); min-height: 1.4em; }
.ocr-status p.err { color: var(--bad); }
.ocr-view { position: relative; display: block; width: 100%; border-radius: var(--radius); overflow: hidden; background: var(--surface-2); border: 1px solid var(--border); }
.ocr-view canvas { display: block; width: 100%; height: auto; }
.ocr-view svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.ocr-view polygon { fill: rgba(247, 189, 61, .14); stroke: #e5a50a; stroke-width: 2; vector-effect: non-scaling-stroke; transition: fill .15s; cursor: pointer; }
.ocr-view polygon.low { stroke: #e5484d; fill: rgba(229, 72, 77, .12); }
.ocr-view polygon.hl { fill: rgba(47, 99, 240, .28); stroke: #2f63f0; stroke-width: 3; }
.ocr-app.busy .ocr-view::after, [data-ocr-tool].busy .ocr-view::after {
  content: ""; position: absolute; left: 0; right: 0; height: 70px; top: -70px;
  background: linear-gradient(180deg, transparent, rgba(63, 208, 240, .25) 75%, rgba(63, 208, 240, .9)); animation: scan-sweep 1.6s linear infinite;
}
.ocr-results-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 18px; align-items: start; }
@media (max-width: 1100px) { .ocr-results-grid { grid-template-columns: 1fr; } }
.ocr-lines li.empty { display: block; color: var(--muted); padding: 16px; }
.out-box { margin-top: 14px; border: 1px solid rgba(255,255,255,.07); border-radius: var(--radius); background: var(--code-bg); color: var(--code-text); overflow: hidden; }
.out-box .code-head { justify-content: flex-start; }
.out-box pre { margin: 0; padding: 14px 16px; max-height: 360px; overflow: auto; font: 12.8px/1.65 var(--font-mono); white-space: pre-wrap; word-break: break-word; }
.out-actions { display: flex; gap: 6px; margin-left: auto; }
.ocr-placeholder { display: grid; place-items: center; text-align: center; min-height: 380px; border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); color: var(--muted); padding: 30px; background: radial-gradient(60% 60% at 50% 40%, var(--accent-soft), transparent); }
.ocr-placeholder svg { width: 54px; height: 54px; color: var(--accent); margin: 0 auto 10px; }
.ocr-placeholder strong { color: var(--text); font-size: 18px; display: block; margin-bottom: 6px; }
.range-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
.range-row output { font: 500 12.5px var(--font-mono); color: var(--text-2); min-width: 38px; text-align: right; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
details.adv { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
details.adv summary { cursor: pointer; padding: 10px 12px; font-size: 13.5px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
details.adv summary::-webkit-details-marker { display: none; }
details.adv > div { padding: 0 12px 12px; }
.privacy-note { display: flex; gap: 10px; font-size: 12.5px; color: var(--text-2); padding: 12px; border-radius: var(--radius); background: color-mix(in srgb, var(--good) 8%, transparent); border: 1px solid color-mix(in srgb, var(--good) 22%, transparent); }
.privacy-note svg { width: 18px; height: 18px; color: var(--good); flex: none; }

/* tool layout: full-width tool, readable text column */
.tool-layout { padding-top: 32px; padding-bottom: 80px; }
.tool-layout .prose.wide > :is(p, ul, ol, h2, h3, h4, .faq, .callout, .sources, .page-updated, blockquote) { max-width: 820px; }
.tool-layout .prose.wide > .table-wrap, .tool-layout .prose.wide > .chart-card, .tool-layout .prose.wide > .code { max-width: 980px; }

/* stacked tool layout for tools inside the docs column */
.tool-cols.stack { grid-template-columns: 1fr; }
.tool-cols.stack > :first-child { border-right: 0; border-bottom: 1px solid var(--border); }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 22px; }
.field-grid .field.full { grid-column: 1 / -1; }
@media (max-width: 720px) { .field-grid { grid-template-columns: 1fr; } }
.seg button:disabled { opacity: .4; cursor: not-allowed; }
.lead-answer code { font-size: .82em; }

.prose > .grid { margin: 22px 0 30px; }

/* polish: wider docs container on large screens, no mid-word wraps in row headers */
@media (min-width: 1280px) { .container.doc-layout { max-width: 1360px; } }
.stats { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
tbody th { white-space: nowrap; }
.tool-cols { grid-template-columns: 380px minmax(0, 1fr); }
@media (max-width: 900px) { .tool-cols { grid-template-columns: 1fr; } }
.seg.block button { padding: 7px 8px; line-height: 1.25; }
.chart-card figcaption { padding-right: 72px; }

/* robustness: grid children never force overflow; long tokens wrap */
.grid > *, .bento > *, .chooser > * { min-width: 0; }
.code-head { min-width: 0; }
.code-tabs { overflow-x: auto; scrollbar-width: none; min-width: 0; }
.code-tabs::-webkit-scrollbar { display: none; }
.faq summary { overflow-wrap: anywhere; }
code, kbd, pre { font-feature-settings: "zero" 1; }
.result, .out-note > span, .prose h2, .prose h3 { overflow-wrap: anywhere; }
.split > *, .hero-grid > *, .tool-cols > *, .ocr-app > *, .doc-layout > * { min-width: 0; }

/* CJK + overflow polish */
.tool-cols.stack { grid-template-columns: minmax(0, 1fr); }
.field-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
@media (max-width: 720px) { .field-grid { grid-template-columns: minmax(0, 1fr); } }
.copy, .btn, .tag, .seg button { white-space: nowrap; }
:lang(zh) :is(h1, h2, h3, .stat-value, .eyebrow), :lang(ja) :is(h1, h2, h3, .stat-value, .eyebrow) { letter-spacing: 0; }
:lang(zh) .prose, :lang(ja) .prose { line-height: 1.8; }
.table-wrap.wide-table table { min-width: 760px; }
:lang(ja) :is(h1, h2, h3, .lede, .hero-lede) { word-break: auto-phrase; }