/* ============================================================
   Quantum Bridge — shared stylesheet
   Clean, Chainlink-inspired design system:
   light surfaces, deep blue accent, geometric type, hex motif.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@500;600;700;800&family=Manrope:wght@400;500;600;700&display=swap');

:root{
  /* Brand */
  --blue:#375bd2;
  --blue-600:#2f4ec2;
  --blue-700:#213b9c;
  --blue-900:#111a44;

  /* Ink & neutrals */
  --ink:#0d1220;
  --ink-2:#3b4256;
  --muted:#697089;
  --line:#e6e9f2;
  --line-2:#eef1f8;

  /* Surfaces */
  --bg:#ffffff;
  --bg-alt:#f5f7fc;
  --tint:#eef2fd;
  --navy:#0b1020;

  --radius:20px;
  --radius-sm:14px;
  --maxw:1180px;

  --shadow-sm:0 1px 2px rgba(16,24,48,.05), 0 2px 8px rgba(16,24,48,.04);
  --shadow:0 22px 48px -24px rgba(24,38,96,.35);
  --shadow-blue:0 24px 50px -20px rgba(55,91,210,.45);

  --font:'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --display:'Sora', 'Manrope', sans-serif;
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{ color:var(--blue); text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:24px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font);
  font-weight:600;
  font-size:15px;
  line-height:1;
  padding:14px 24px;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn svg{ width:16px; height:16px; }
.btn-primary{ background:var(--blue); color:#fff; box-shadow:0 8px 20px -8px rgba(55,91,210,.6); }
.btn-primary:hover{ background:var(--blue-600); transform:translateY(-2px); box-shadow:var(--shadow-blue); }
.btn-ghost{ background:#fff; color:var(--ink); border-color:var(--line); }
.btn-ghost:hover{ border-color:var(--blue); color:var(--blue); transform:translateY(-2px); }
.btn-light{ background:rgba(255,255,255,.14); color:#fff; border-color:rgba(255,255,255,.28); }
.btn-light:hover{ background:rgba(255,255,255,.24); transform:translateY(-2px); }
.btn-white{ background:#fff; color:var(--blue-700); }
.btn-white:hover{ transform:translateY(-2px); box-shadow:0 16px 36px -16px rgba(0,0,0,.4); }

/* ---------- Navigation ---------- */
.nav{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  gap:20px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--display);
  font-weight:700;
  font-size:19px;
  color:var(--ink);
  letter-spacing:-.01em;
}
.brand img{ height:34px; width:34px; object-fit:contain; }

.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-links a{
  color:var(--ink-2);
  font-weight:600;
  font-size:15px;
  padding:9px 14px;
  border-radius:10px;
  transition:color .15s ease, background .15s ease;
}
.nav-links a:hover{ color:var(--blue); background:var(--tint); }
.nav-links .btn{ margin-left:10px; padding:11px 20px; }
.nav-links a.btn:hover{ background:var(--blue-600); color:#fff; }

.nav-toggle{ display:none; }
.nav-burger{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  cursor:pointer;
}
.nav-burger span{
  display:block;
  height:2px;
  width:20px;
  margin-inline:auto;
  background:var(--ink);
  border-radius:2px;
  transition:transform .25s ease, opacity .2s ease;
}

/* ---------- Section scaffolding ---------- */
.section{ padding:96px 0; }
.section-alt{ background:var(--bg-alt); }
.section-tight{ padding:64px 0; }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--display);
  font-weight:600;
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--blue);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--blue);
  border-radius:2px;
}

.section-head{ max-width:680px; margin-bottom:52px; }
.section-head.center{ margin-inline:auto; text-align:center; }
.section-head.center .eyebrow{ justify-content:center; }

h1,h2,h3{ font-family:var(--display); font-weight:700; letter-spacing:-.02em; line-height:1.1; color:var(--ink); }

.section-head h2{ font-size:clamp(30px,4vw,46px); margin-top:18px; }
.section-head p{ font-size:19px; color:var(--muted); margin-top:18px; line-height:1.55; }

/* ---------- Hero (home) ---------- */
.hero{
  position:relative;
  overflow:hidden;
  padding:88px 0 96px;
  background:
    radial-gradient(60% 90% at 88% 8%, rgba(55,91,210,.10), transparent 60%),
    radial-gradient(70% 80% at 6% 100%, rgba(55,91,210,.08), transparent 55%),
    linear-gradient(180deg,#fbfcff, #f4f6fd);
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(55,91,210,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(55,91,210,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(80% 70% at 50% 30%,#000,transparent 80%);
          mask-image:radial-gradient(80% 70% at 50% 30%,#000,transparent 80%);
  z-index:0;
}
.hero-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.hero h1{
  font-size:clamp(38px,5.4vw,66px);
  font-weight:800;
  letter-spacing:-.03em;
  margin:22px 0 0;
}
.hero h1 .accent{ color:var(--blue); }
.hero-lead{
  font-size:20px;
  color:var(--ink-2);
  margin-top:22px;
  max-width:520px;
  line-height:1.6;
}
.hero-cta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:34px; }
.hero-pill{
  display:inline-flex; align-items:center; gap:10px;
  background:#fff; border:1px solid var(--line);
  border-radius:999px; padding:7px 7px 7px 16px;
  font-weight:600; font-size:14px; color:var(--ink-2);
  box-shadow:var(--shadow-sm); margin-bottom:8px;
}
.hero-pill b{ background:var(--tint); color:var(--blue-700); padding:5px 12px; border-radius:999px; font-weight:700; }

/* Hex network visual */
.hexnet{ position:relative; width:100%; aspect-ratio:1/1; max-width:520px; margin-inline:auto; }
.hexnet svg{ width:100%; height:100%; overflow:visible; }
.hexnet .link{ stroke:var(--blue); stroke-width:1.4; opacity:.35; fill:none; stroke-dasharray:5 6; animation:dash 3.2s linear infinite; }
.hexnet .hex-node{ fill:#fff; stroke:var(--line); stroke-width:1.5; filter:drop-shadow(0 10px 22px rgba(24,38,96,.12)); }
.hexnet .hex-core{ fill:var(--blue); stroke:none; filter:drop-shadow(0 16px 30px rgba(55,91,210,.5)); }
.hexnet text{ font-family:var(--display); font-weight:700; fill:var(--ink-2); }
.hexnet .core-label{ fill:#fff; font-size:26px; }
.hexnet .pulse{ transform-box:fill-box; transform-origin:center; animation:pulse 3.2s ease-in-out infinite; }
@keyframes dash{ to{ stroke-dashoffset:-44; } }
@keyframes pulse{ 0%,100%{ opacity:.55; } 50%{ opacity:1; } }

/* ---------- Stats strip ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  padding:44px 40px;
  background:var(--navy);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  color:#fff;
  margin-top:-40px;
  position:relative;
  z-index:5;
}
.stats .stat .num{ font-family:var(--display); font-weight:800; font-size:38px; letter-spacing:-.02em; color:#fff; }
.stats .stat .num span{ color:#7d97ee; }
.stats .stat .label{ color:#aeb6cf; font-size:14px; margin-top:6px; }

/* ---------- Chain marquee ---------- */
.marquee{ overflow:hidden; -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent); mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent); }
.marquee-track{ display:flex; gap:14px; width:max-content; animation:scroll 34s linear infinite; }
.marquee:hover .marquee-track{ animation-play-state:paused; }
.chain-chip{
  display:inline-flex; align-items:center; gap:9px;
  font-weight:600; font-size:15px; color:var(--ink-2);
  background:#fff; border:1px solid var(--line);
  border-radius:999px; padding:12px 20px; white-space:nowrap;
}
.chain-chip .dot{ width:9px; height:9px; border-radius:50%; background:var(--blue); }
@keyframes scroll{ to{ transform:translateX(-50%); } }

/* ---------- Product tiles ---------- */
.tiles{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:22px;
}
.tile{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px 30px 30px;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  overflow:hidden;
}
.tile::after{
  content:"";
  position:absolute; left:0; top:0; height:3px; width:0;
  background:linear-gradient(90deg,var(--blue),#6f8bff);
  transition:width .3s ease;
}
.tile:hover{ transform:translateY(-6px); box-shadow:var(--shadow); border-color:transparent; }
.tile:hover::after{ width:100%; }
.tile .ic{
  width:52px; height:52px; border-radius:14px;
  display:grid; place-items:center;
  background:var(--tint); color:var(--blue);
  margin-bottom:20px;
}
.tile .ic svg{ width:26px; height:26px; }
.tile h3{ font-size:21px; }
.tile p{ color:var(--muted); margin-top:10px; font-size:16px; }
.tile .more{ display:inline-flex; align-items:center; gap:6px; margin-top:18px; font-weight:600; font-size:14px; color:var(--blue); }
.tile .more svg{ width:15px; height:15px; transition:transform .2s ease; }
.tile:hover .more svg{ transform:translateX(4px); }

/* ---------- How it works / steps ---------- */
.steps{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:20px; counter-reset:step; }
.step{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:28px 24px; }
.step .n{
  font-family:var(--display); font-weight:800; font-size:15px;
  width:34px; height:34px; border-radius:10px; display:grid; place-items:center;
  background:var(--blue); color:#fff; margin-bottom:16px;
}
.step h3{ font-size:18px; }
.step p{ color:var(--muted); font-size:15px; margin-top:8px; }

/* ---------- Token facts ---------- */
.facts{ display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:18px; }
.fact{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:26px; }
.fact .k{ font-size:13px; letter-spacing:.06em; text-transform:uppercase; color:var(--muted); font-weight:600; }
.fact .v{ font-family:var(--display); font-weight:700; font-size:26px; margin-top:8px; color:var(--ink); }

/* ---------- Roadmap ---------- */
.roadmap{ display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:20px; }
.phase{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:28px; position:relative; }
.phase .tag{ font-family:var(--display); font-weight:700; font-size:13px; letter-spacing:.1em; text-transform:uppercase; color:var(--blue); }
.phase h3{ font-size:19px; margin-top:10px; }
.phase p{ color:var(--muted); font-size:15px; margin-top:8px; }
.phase .bar{ height:4px; border-radius:4px; background:var(--line-2); margin-top:18px; overflow:hidden; }
.phase .bar i{ display:block; height:100%; background:var(--blue); border-radius:4px; }

/* ---------- CTA band ---------- */
.cta-band{
  position:relative; overflow:hidden;
  background:linear-gradient(135deg,var(--blue-700),var(--blue) 60%,#4f74ea);
  border-radius:28px; padding:64px 56px; color:#fff; text-align:center;
}
.cta-band::before{
  content:""; position:absolute; inset:0;
  background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(70% 100% at 50% 0,#000,transparent);
          mask-image:radial-gradient(70% 100% at 50% 0,#000,transparent);
}
.cta-band > *{ position:relative; z-index:1; }
.cta-band h2{ color:#fff; font-size:clamp(28px,3.6vw,42px); }
.cta-band p{ color:rgba(255,255,255,.85); font-size:19px; max-width:560px; margin:16px auto 0; }
.cta-band .hero-cta{ justify-content:center; margin-top:30px; }

/* ---------- Footer ---------- */
.footer{ background:var(--navy); color:#c3cbe0; padding:72px 0 34px; }
.footer-top{ display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:40px; }
.footer .brand{ color:#fff; margin-bottom:16px; }
.footer .brand img{ filter:brightness(0) invert(1); }
.footer-blurb{ color:#8b93ae; font-size:15px; max-width:300px; }
.footer h4{ font-family:var(--display); font-size:14px; letter-spacing:.08em; text-transform:uppercase; color:#fff; margin-bottom:16px; }
.footer ul{ list-style:none; }
.footer li{ margin-bottom:11px; }
.footer li a{ color:#adb5cc; font-size:15px; transition:color .15s ease; }
.footer li a:hover{ color:#fff; }
.footer-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:14px;
  margin-top:52px; padding-top:26px; border-top:1px solid rgba(255,255,255,.1);
  color:#7f88a3; font-size:14px;
}
.footer-bottom .tagline{ font-family:var(--display); color:#9aa3c0; letter-spacing:.02em; }

/* ============================================================
   Article / document pages
   ============================================================ */
.doc-hero{
  background:
    radial-gradient(60% 100% at 85% 0, rgba(55,91,210,.10), transparent 60%),
    linear-gradient(180deg,#fbfcff,#f4f6fd);
  border-bottom:1px solid var(--line);
  padding:72px 0 64px;
}
.doc-hero .container{ max-width:900px; }
.doc-hero .kicker{ color:var(--blue); font-family:var(--display); font-weight:700; letter-spacing:.14em; text-transform:uppercase; font-size:13px; }
.doc-hero h1{ font-size:clamp(32px,4.6vw,54px); font-weight:800; letter-spacing:-.03em; margin-top:16px; max-width:16ch; }
.doc-hero .tagline{ font-size:20px; color:var(--ink-2); margin-top:20px; max-width:60ch; }
.doc-hero .tagline + .tagline{ margin-top:6px; font-size:17px; color:var(--muted); }
.doc-hero .meta{ display:inline-block; margin-top:22px; font-family:var(--display); font-weight:600; font-size:14px; color:var(--blue-700); background:var(--tint); padding:6px 16px; border-radius:999px; }

.doc{ max-width:820px; margin:0 auto; padding:64px 24px 96px; }
.doc > h2{
  font-size:clamp(26px,3vw,34px);
  margin:56px 0 20px;
  padding-top:32px;
  border-top:1px solid var(--line);
}
.doc > h2:first-child{ border-top:none; padding-top:0; margin-top:0; }
.doc h3{ font-size:21px; color:var(--ink); margin:32px 0 10px; }
.doc h3 + p{ margin-top:0; }
.doc p{ font-size:18px; color:var(--ink-2); margin-bottom:16px; line-height:1.75; }
.doc ul, .doc ol{ margin:12px 0 22px 22px; }
.doc li{ font-size:18px; color:var(--ink-2); line-height:1.7; margin-bottom:9px; }
.doc li::marker{ color:var(--blue); }
.doc strong{ color:var(--ink); }

.pull{
  font-family:var(--display); font-weight:700;
  font-size:clamp(22px,2.6vw,30px); line-height:1.35;
  color:var(--blue-700);
  border-left:4px solid var(--blue);
  padding:6px 0 6px 26px;
  margin:40px 0;
  letter-spacing:-.01em;
}

/* Table of contents */
.toc{ background:var(--bg-alt); border:1px solid var(--line); border-radius:var(--radius); padding:30px 36px; }
.toc ol{ margin:0 0 0 20px; columns:2; column-gap:40px; }
.doc .toc li{ font-size:16px; margin-bottom:8px; }

/* Reusable card grid (features, advantages) */
.grid-cards{ display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:20px; margin:26px 0; }
.grid-cards > div{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:26px; box-shadow:var(--shadow-sm); transition:transform .2s ease, box-shadow .2s ease; }
.grid-cards > div:hover{ transform:translateY(-4px); box-shadow:var(--shadow); }
.doc .grid-cards h3{ margin:0 0 8px; font-size:18px; }
.doc .grid-cards p{ font-size:15px; margin-bottom:0; color:var(--muted); }

/* Pill component list */
.components{ display:grid; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); gap:14px; margin:26px 0; }
.components > div{
  background:var(--tint); border:1px solid rgba(55,91,210,.14);
  border-radius:12px; padding:16px 20px;
  font-family:var(--display); font-weight:600; font-size:15px; color:var(--blue-700);
  text-align:center;
}

/* Token table */
.token-table{ display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:16px; margin:26px 0; }
.token-table > div{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:22px; box-shadow:var(--shadow-sm); }
.doc .token-table h3{ margin:0 0 6px; font-size:13px; letter-spacing:.05em; text-transform:uppercase; color:var(--muted); font-weight:600; }
.doc .token-table p{ margin:0; font-family:var(--display); font-weight:700; font-size:22px; color:var(--ink); }

/* Tokenomics */
.tokenomics{ display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:16px; margin:26px 0; }
.tokenomics > div{ background:#fff; border:1px solid var(--line); border-radius:var(--radius-sm); padding:26px; text-align:center; box-shadow:var(--shadow-sm); }
.tokenomics .pct{ font-family:var(--display); font-weight:800; font-size:38px; color:var(--blue); letter-spacing:-.02em; }
.tokenomics .label{ margin-top:6px; color:var(--muted); font-size:14px; }

/* Comparison table */
.compare{ width:100%; border-collapse:separate; border-spacing:0; margin:30px 0; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; }
.compare th, .compare td{ text-align:left; padding:18px 24px; border-bottom:1px solid var(--line); font-size:17px; }
.compare th{ font-family:var(--display); font-size:13px; letter-spacing:.08em; text-transform:uppercase; color:var(--muted); background:var(--bg-alt); }
.compare tr:last-child td{ border-bottom:none; }
.compare .platform{ font-weight:600; color:var(--ink); }
.compare .highlight td{ background:var(--tint); }
.compare .highlight .platform{ color:var(--blue-700); font-weight:700; }

/* Solution diagram */
.diagram{ margin:30px 0; border:1px solid var(--line); border-radius:var(--radius); padding:40px 28px; background:var(--bg-alt); text-align:center; }
.diagram .chains{ display:grid; grid-template-columns:repeat(auto-fit,minmax(110px,1fr)); gap:12px; max-width:720px; margin:0 auto 26px; }
.diagram .chains span{ background:#fff; border:1px solid var(--line); border-radius:10px; padding:12px 8px; font-weight:600; font-size:14px; color:var(--ink-2); box-shadow:var(--shadow-sm); }
.diagram .arrow{ font-size:24px; color:var(--blue); line-height:1; opacity:.6; }
.diagram .hub{ font-family:var(--display); font-weight:800; font-size:22px; color:#fff; margin:16px auto; padding:20px 30px; background:var(--blue); border-radius:16px; display:inline-block; box-shadow:var(--shadow-blue); letter-spacing:-.01em; }
.diagram .services{ display:grid; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); gap:12px; max-width:760px; margin:26px auto 0; }
.diagram .services span{ background:var(--tint); border:1px solid rgba(55,91,210,.14); border-radius:10px; padding:12px; font-size:14px; font-weight:500; color:var(--blue-700); }
.diagram .caption{ font-family:var(--display); font-weight:600; font-size:16px; color:var(--muted); margin-top:26px; letter-spacing:.04em; }

/* Entrance animation */
.reveal{ opacity:0; transform:translateY(18px); animation:reveal .7s cubic-bezier(.22,1,.36,1) forwards; }
.reveal.d1{ animation-delay:.08s; }
.reveal.d2{ animation-delay:.16s; }
.reveal.d3{ animation-delay:.24s; }
@keyframes reveal{ to{ opacity:1; transform:none; } }
@media (prefers-reduced-motion:reduce){
  .reveal{ animation:none; opacity:1; transform:none; }
  .marquee-track, .hexnet .link, .hexnet .pulse{ animation:none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:900px){
  .nav-burger{ display:flex; }
  .nav-links{
    position:absolute; top:72px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    background:#fff; border-bottom:1px solid var(--line);
    padding:14px 20px 20px;
    box-shadow:var(--shadow);
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:transform .22s ease, opacity .22s ease;
  }
  .nav-links a{ padding:13px 12px; }
  .nav-links .btn{ margin:8px 0 0; justify-content:center; }
  .nav-toggle:checked ~ .nav-links{ transform:none; opacity:1; pointer-events:auto; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2){ opacity:0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .hero-grid{ grid-template-columns:1fr; gap:40px; }
  .hexnet{ max-width:400px; order:-1; }
  .stats{ grid-template-columns:repeat(2,1fr); gap:28px 20px; margin-top:-30px; }
  .footer-top{ grid-template-columns:1fr 1fr; gap:32px; }
}

@media (max-width:560px){
  .section{ padding:64px 0; }
  .stats{ grid-template-columns:1fr 1fr; padding:32px 24px; }
  .cta-band{ padding:48px 26px; }
  .footer-top{ grid-template-columns:1fr; }
  .toc ol{ columns:1; }
  .hero-cta .btn{ flex:1; justify-content:center; }
}