/* ============================================
   Hindi Toxicity Bias — clean minimal styling
   ============================================ */

:root {
  color-scheme: light;
  --bg: #edf3ff;
  --bg-alt: rgba(255,255,255,.26);
  --surface: rgba(255,255,255,.52);
  --surface-strong: rgba(255,255,255,.72);
  --surface-soft: rgba(255,255,255,.34);
  --text: #14181c;
  --text-muted: #5a6470;
  --border: rgba(148,163,184,.28);
  --glass-border: rgba(255,255,255,.52);
  --glass-highlight: rgba(255,255,255,.66);
  --accent: #2b5fff;
  --accent-soft: rgba(43, 95, 255, 0.14);
  --accent-strong: #3f73ff;
  --baseline: #6b7280;
  --cda: #16a34a;
  --adv: #d97706;
  --good: #16a34a;
  --shadow: 0 14px 40px rgba(113,129,162,.16);
  --shadow-hover: 0 20px 48px rgba(113,129,162,.2);
  --radius: 10px;
  --max-width: 1100px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --header-bg: rgba(255,255,255,.5);
  --header-bg-scrolled: rgba(255,255,255,.64);
  --header-shadow: 0 16px 42px rgba(113,129,162,.22);
  --header-border: rgba(255,255,255,.56);
  --button-primary-hover: #000000;
  --text-inverse: #ffffff;
  --inline-code-bg: rgba(255,255,255,.42);
  --code-bg: rgba(20,24,28,.82);
  --code-text: #eef3ff;
  --footer-bg: rgba(20,24,28,.56);
  --footer-text: #ecf2fb;
  --footer-muted: #c3cfdf;
  --footer-border: rgba(255,255,255,.12);
  --badge-baseline-bg: #e5e7eb;
  --badge-baseline-text: #374151;
  --badge-cda-bg: #dcfce7;
  --badge-cda-text: #166534;
  --badge-adv-bg: #fed7aa;
  --badge-adv-text: #9a3412;
  --row-best-bg: linear-gradient(90deg, rgba(22,163,74,.06), transparent);
  --glass-blur: blur(18px) saturate(165%);
  --glass-blur-strong: blur(24px) saturate(185%);
  --page-glow-a: rgba(43,95,255,.16);
  --page-glow-b: rgba(56,189,248,.14);
  --page-glow-c: rgba(251,191,36,.1);
  --page-wash: rgba(255,255,255,.68);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #08111f;
  --bg-alt: rgba(15,23,42,.34);
  --surface: rgba(15,23,42,.46);
  --surface-strong: rgba(15,23,42,.68);
  --surface-soft: rgba(15,23,42,.26);
  --text: #f3f4f6;
  --text-muted: #9ca3af;
  --border: rgba(71,85,105,.3);
  --glass-border: rgba(148,163,184,.18);
  --glass-highlight: rgba(255,255,255,.08);
  --accent: #7cb4ff;
  --accent-soft: rgba(124, 180, 255, 0.14);
  --accent-strong: #a3cfff;
  --baseline: #94a3b8;
  --cda: #4ade80;
  --adv: #f59e0b;
  --good: #4ade80;
  --shadow: 0 18px 48px rgba(0,0,0,.3);
  --shadow-hover: 0 22px 56px rgba(0,0,0,.38);
  --header-bg: rgba(8,17,31,.48);
  --header-bg-scrolled: rgba(8,17,31,.62);
  --header-shadow: 0 18px 42px rgba(0,0,0,.38);
  --header-border: rgba(148,163,184,.16);
  --button-primary-hover: #dbe4f0;
  --text-inverse: #0d1117;
  --inline-code-bg: rgba(15,23,42,.48);
  --code-bg: rgba(6,10,18,.86);
  --code-text: #dbe4f0;
  --footer-bg: rgba(6,10,18,.58);
  --footer-text: #dbe4f0;
  --footer-muted: #94a3b8;
  --footer-border: rgba(148,163,184,.12);
  --badge-baseline-bg: #1f2937;
  --badge-baseline-text: #d1d5db;
  --badge-cda-bg: rgba(74, 222, 128, 0.14);
  --badge-cda-text: #86efac;
  --badge-adv-bg: rgba(245, 158, 11, 0.16);
  --badge-adv-text: #fdba74;
  --row-best-bg: linear-gradient(90deg, rgba(74,222,128,.12), transparent);
  --glass-blur: blur(18px) saturate(155%);
  --glass-blur-strong: blur(24px) saturate(175%);
  --page-glow-a: rgba(59,130,246,.16);
  --page-glow-b: rgba(14,165,233,.1);
  --page-glow-c: rgba(76,29,149,.14);
  --page-wash: rgba(8,17,31,.78);
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
}
body {
  position: relative;
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(900px 520px at 50% 100%, var(--page-glow-c), transparent 62%),
    linear-gradient(180deg, var(--page-wash) 0%, var(--bg) 100%);
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(255,255,255,.12), rgba(255,255,255,0) 28%);
  opacity: .35;
  z-index: 0;
}
main,
.site-header,
.site-footer {
  position: relative;
  z-index: 1;
}

a { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: 760px; }

/* HEADER / NAV */
.site-header {
  position: sticky; top: 12px; z-index: 60;
  background: transparent;
  border: 0;
  padding: 0 16px;
  transition: transform .25s ease;
}
.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  background: var(--header-bg);
  border: 1px solid var(--header-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: background-color .25s ease, border-color .25s ease, box-shadow .25s ease, backdrop-filter .25s ease, -webkit-backdrop-filter .25s ease;
  overflow: hidden;
}
.site-header.scrolled .nav {
  background: var(--header-bg-scrolled);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  box-shadow: var(--header-shadow);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 600;
  flex: 0 0 auto;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--text); color: var(--text-inverse);
  font-size: 12px; font-weight: 700; letter-spacing: .5px;
}
.brand-text {
  font-size: 15px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  list-style: none; margin: 0; padding: 0;
  flex: 1 1 auto;
  min-width: 0;
  margin-left: 12px;
  overflow: hidden;
}
.nav-links li {
  flex: 0 0 auto;
}
.nav-mobile-only {
  display: none;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color .15s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.nav-shortcuts {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, background-color .2s ease, border-color .2s ease, color .2s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}
.theme-toggle:hover { transform: translateY(-1px); }
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.theme-toggle-switch {
  position: relative;
  width: 46px;
  height: 26px;
  border-radius: 999px;
  background:
    linear-gradient(180deg, #dbeafe 0%, #bfdbfe 100%);
  border: 1px solid rgba(43, 95, 255, 0.18);
  box-shadow: inset 0 1px 2px rgba(255,255,255,.7);
  overflow: hidden;
  transition: background .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.theme-toggle-switch::before,
.theme-toggle-switch::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  opacity: .9;
  transition: opacity .35s ease, transform .35s ease;
}
.theme-toggle-switch::before {
  width: 12px;
  height: 12px;
  top: 3px;
  right: 6px;
  background: rgba(255,255,255,.75);
}
.theme-toggle-switch::after {
  width: 4px;
  height: 4px;
  top: 7px;
  right: 18px;
  background: rgba(255,255,255,.95);
}
.theme-toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow:
    inset -5px -5px 0 rgba(251, 191, 36, 0.95),
    0 2px 6px rgba(20,24,28,.18);
  transition:
    transform .4s cubic-bezier(.22,1,.36,1),
    background .35s ease,
    box-shadow .35s ease;
}
:root[data-theme="dark"] .theme-toggle-switch {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  border-color: rgba(148, 163, 184, 0.28);
  box-shadow: inset 0 1px 2px rgba(0,0,0,.35);
}
:root[data-theme="dark"] .theme-toggle-switch::before,
:root[data-theme="dark"] .theme-toggle-switch::after {
  opacity: 1;
  transform: scale(1);
}
:root[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(20px) rotate(180deg);
  background: linear-gradient(180deg, #e2e8f0 0%, #cbd5e1 100%);
  box-shadow:
    inset -7px -3px 0 rgba(100, 116, 139, 0.95),
    0 2px 8px rgba(0,0,0,.28);
}
.theme-toggle.is-toggling .theme-toggle-switch {
  animation: themeToggleBounce .45s ease;
}
.theme-toggle.is-toggling .theme-toggle-thumb {
  animation: themeToggleSpin .45s ease;
}
.theme-toggle-text { line-height: 1; }

@keyframes themeToggleBounce {
  0% { transform: scale(1); }
  50% { transform: scale(1.06); }
  100% { transform: scale(1); }
}

@keyframes themeToggleSpin {
  0% { filter: brightness(1); }
  50% { filter: brightness(1.08); }
  100% { filter: brightness(1); }
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 32px; height: 32px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text);
  margin: 0 auto;
  transition: transform .2s ease, opacity .2s ease;
}

/* HERO */
.hero {
  padding: 96px 0 72px;
  background: transparent;
}
.eyebrow {
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 16px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.15;
  margin: 0 0 24px;
  letter-spacing: -.02em;
  font-weight: 700;
  max-width: 900px;
}
.lede {
  font-size: 19px;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 0 40px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 36px;
  max-width: 760px;
}
.stat {
  display: flex; flex-direction: column;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.stat-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.01em;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-actions {
  display: flex; gap: 12px; flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s ease;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, color-mix(in srgb, var(--text) 92%, var(--accent) 8%), color-mix(in srgb, var(--text) 78%, var(--accent) 22%));
  color: var(--text-inverse);
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}
.btn-primary:hover {
  background: var(--button-primary-hover);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-ghost {
  background: var(--surface-soft); color: var(--text);
  border-color: var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}
.btn-ghost:hover { background: var(--bg-alt); text-decoration: none; }

/* SECTIONS */
.section {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.section-alt {
  background: linear-gradient(180deg, transparent 0%, var(--surface-soft) 15%, var(--surface-soft) 85%, transparent 100%);
}
.section h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  letter-spacing: -.015em;
  margin: 0 0 16px;
  font-weight: 700;
}
.section-lede {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 720px;
  margin: 0 0 36px;
}
.subhead {
  font-size: 18px;
  font-weight: 600;
  margin: 40px 0 16px;
}

/* GRIDS */
.grid {
  display: grid;
  gap: 20px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, background-color .25s ease, border-color .25s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.card::before,
.stat::before,
.author-card::before,
.paper-cta::before,
.theme-toggle::before,
.nav::before,
.nav-github::before,
.nav-guide::before,
.nav-pdf::before,
.btn-ghost::before,
.btn-primary::before,
.site-footer::before,
.repro-steps li::after {
  content: "";
  position: absolute;
  inset: 1px 1px auto 1px;
  height: 46%;
  border-radius: inherit;
  background: linear-gradient(180deg, var(--glass-highlight), rgba(255,255,255,0));
  opacity: .75;
  pointer-events: none;
}
.card h3 {
  margin: 0 0 14px;
  font-size: 17px;
  font-weight: 600;
}

.method-card { display: flex; flex-direction: column; }
.method-card p { color: var(--text-muted); font-size: 14px; margin: 0 0 14px; }
.hyper-list {
  list-style: none;
  padding: 0; margin: auto 0 0;
  font-size: 13px;
  color: var(--text-muted);
}
.hyper-list li { padding: 4px 0; border-top: 1px dashed var(--border); }
.hyper-list li:first-child { border-top: 0; }

.config-card .data-table { font-size: 14px; }

/* TABLES */
.table-wrap { overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data-table th, .data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.data-table tr.total td {
  font-weight: 600;
  border-top: 2px solid var(--text);
  border-bottom: 0;
}
.data-table code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  background: var(--inline-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--glass-border);
}

.results-table th.group-header {
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.results-table tr.row-best {
  background: var(--row-best-bg);
}
.results-table strong { color: var(--text); }

.caption {
  color: var(--text-muted);
  font-size: 13px;
  margin: 12px 0 0;
  font-style: italic;
}

/* DELTA CARDS */
.deltas { margin-top: 24px; }
.delta-card {
  display: flex; flex-direction: column;
  align-items: flex-start;
  padding: 24px;
}
.delta-label {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
}
.delta-value {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 8px 0 4px;
}
.delta-card.good .delta-value { color: var(--good); }
.delta-sub { font-size: 13px; color: var(--text-muted); }

/* BADGES */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.badge-baseline { background: var(--badge-baseline-bg); color: var(--badge-baseline-text); }
.badge-cda { background: var(--badge-cda-bg); color: var(--badge-cda-text); }
.badge-adv { background: var(--badge-adv-bg); color: var(--badge-adv-text); }
.method-card .badge { align-self: flex-start; margin-bottom: 14px; }

/* CHART */
.chart {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px 16px;
  align-items: center;
  padding: 8px 0;
}
.chart-row-label {
  font-size: 13px;
  color: var(--text-muted);
  text-align: right;
  font-weight: 500;
}
.chart-bars {
  display: flex; flex-direction: column; gap: 6px;
}
.chart-bar {
  display: grid;
  grid-template-columns: 80px 1fr 60px;
  gap: 8px;
  align-items: center;
  font-size: 12px;
}
.chart-bar-label { color: var(--text-muted); }
.chart-bar-track {
  position: relative;
  height: 8px;
  background: var(--surface-soft);
  border-radius: 4px;
  overflow: hidden;
}
.chart-bar-fill {
  position: absolute; left: 0; top: 0; bottom: 0;
  border-radius: 4px;
  transition: width .6s cubic-bezier(.4,0,.2,1);
}
.chart-bar-fill.baseline { background: var(--baseline); }
.chart-bar-fill.cda { background: var(--cda); }
.chart-bar-fill.adv { background: var(--adv); }
.chart-bar-value { font-variant-numeric: tabular-nums; color: var(--text); }

/* REPRODUCE */
.repro-steps {
  list-style: none;
  counter-reset: step;
  padding: 0; margin: 0 0 32px;
  display: flex; flex-direction: column; gap: 18px;
}
.repro-steps li {
  counter-increment: step;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  position: relative;
  padding-left: 64px;
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  overflow: hidden;
}
.repro-steps li::before {
  content: counter(step);
  position: absolute;
  left: 20px; top: 22px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--text); color: var(--text-inverse);
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
}
.repro-steps h4 {
  margin: 0 0 10px;
  font-size: 15px; font-weight: 600;
}
.repro-steps pre {
  margin: 0;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 14px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
}
.env-card ul { padding-left: 20px; margin: 0; color: var(--text-muted); font-size: 14px; }
.env-card li { padding: 4px 0; }

/* ANALYSIS */
#analysis h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 32px 0 10px;
}
#analysis p, #analysis li { color: var(--text); }
#analysis ul { padding-left: 20px; }
#analysis li { margin-bottom: 8px; }

/* FOOTER */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 56px 0 32px;
  margin-top: 80px;
  border-top: 1px solid var(--footer-border);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  overflow: hidden;
}
.site-footer .brand-text { color: #fff; font-size: 16px; font-weight: 600; margin: 0 0 6px; }
.site-footer .muted { color: var(--footer-muted); font-size: 13px; margin: 0; }
.site-footer .footer-head {
  color: #fff; font-weight: 600; font-size: 13px;
  text-transform: uppercase; letter-spacing: .06em;
  margin: 0 0 12px;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 4px 0; }
.site-footer a { color: var(--footer-text); font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--footer-border);
}
.site-footer .small { font-size: 12px; }

/* ============================================
   LOADER
   ============================================ */
.loader {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: grid;
  place-items: center;
  transition: opacity .5s ease, visibility .5s ease;
}
.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.loader-mark {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--text);
  color: var(--text-inverse);
  display: grid; place-items: center;
  font-size: 18px; font-weight: 700;
  letter-spacing: 1px;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(43,95,255,.35); }
  50% { transform: scale(1.06); box-shadow: 0 0 0 14px rgba(43,95,255,0); }
}
.loader-bar {
  width: 180px; height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.loader-bar span {
  display: block;
  width: 40%; height: 100%;
  background: var(--accent);
  border-radius: 2px;
  animation: slide 1.2s ease-in-out infinite;
}
@keyframes slide {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(150%); }
  100% { transform: translateX(250%); }
}
.loader-text {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 0;
  animation: fade 1.6s ease-in-out infinite;
}
@keyframes fade {
  0%, 100% { opacity: .4; }
  50% { opacity: 1; }
}

/* ============================================
   ENTRANCE / SCROLL ANIMATIONS
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s ease, transform .7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.hero h1, .hero .lede, .hero .eyebrow,
.hero .hero-stats, .hero .hero-actions {
  opacity: 0;
  animation: heroIn .8s ease forwards;
}
.hero .eyebrow      { animation-delay: .15s; }
.hero h1            { animation-delay: .25s; }
.hero .lede         { animation-delay: .40s; }
.hero .hero-stats   { animation-delay: .55s; }
.hero .hero-actions { animation-delay: .70s; }
@keyframes heroIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.stat:hover { transform: translateY(-2px); transition: transform .2s ease; }
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* ============================================
   AUTHORS
   ============================================ */
.authors-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}
.author-card {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.author-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.author-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  margin: 0 auto 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  display: grid; place-items: center;
  font-size: 18px; font-weight: 700;
  letter-spacing: .5px;
}
.author-card h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.author-role {
  margin: 0 0 10px;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.author-mail {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
}

.paper-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  flex-wrap: wrap;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.paper-cta h3 {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 600;
}
.paper-cta p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}
.paper-cta-copy {
  flex: 1 1 420px;
}
.paper-cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav-github,
.nav-guide {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-border);
  background: color-mix(in srgb, var(--surface-strong) 92%, var(--accent) 8%);
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text) !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  line-height: 1;
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.nav-github svg {
  flex: 0 0 auto;
}
.nav-github span {
  line-height: 1;
}
.nav-github-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}
.nav-github:hover,
.nav-guide:hover {
  background: var(--bg-alt);
  text-decoration: none !important;
}
.nav-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--text) 90%, var(--accent) 10%), color-mix(in srgb, var(--text) 68%, var(--accent) 32%));
  color: var(--text-inverse) !important;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px !important;
  font-weight: 600 !important;
  line-height: 1;
  box-shadow: var(--shadow);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}
.nav-pdf:hover {
  background: var(--accent);
  text-decoration: none !important;
}

/* RESPONSIVE */
@media (max-width: 1000px) {
  .authors-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1480px) {
  .nav { padding: 12px 20px; }
  .nav { gap: 12px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 13px; }
  .theme-toggle { padding: 8px 12px; }
  .nav-shortcuts { gap: 8px; }
  .nav-github, .nav-guide, .nav-pdf { font-size: 12px !important; }
  .nav-guide, .nav-pdf { padding: 8px 12px; }
}
@media (max-width: 1360px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .authors-grid { grid-template-columns: repeat(2, 1fr); }
  .paper-cta { flex-direction: column; align-items: flex-start; }
  .paper-cta-actions { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .nav { position: relative; }
  .nav-shortcuts { display: none; }
  .nav-links { margin-left: 0; }
  .nav-actions { gap: 8px; margin-left: auto; }
  .theme-toggle {
    padding: 8px 10px;
    min-width: 40px;
    justify-content: center;
  }
  .theme-toggle-text { display: none; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface-strong);
    border: 1px solid var(--header-border);
    border-radius: 22px;
    padding: 8px 24px 16px;
    display: none;
    box-shadow: var(--header-shadow);
    margin-top: 10px;
    overflow: hidden;
    backdrop-filter: var(--glass-blur-strong);
    -webkit-backdrop-filter: var(--glass-blur-strong);
  }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 10px 0; border-bottom: 1px solid var(--border); }
  .nav-links li:last-child { border-bottom: 0; }
  .nav-mobile-only { display: block; }
  .nav-mobile-only a {
    width: 100%;
    justify-content: center;
  }
  .nav-guide, .nav-pdf {
    width: 100%;
    justify-content: center;
  }
  .hero { padding: 64px 0 56px; }
  .section { padding: 56px 0; }
}
@media (max-width: 480px) {
  .site-header { padding: 0 10px; top: 10px; }
  .brand-text { font-size: 14px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .delta-value { font-size: 36px; }
}