:root {
  --slab-bg: #070d18;
  --slab-bg-2: #0a1220;
  --slab-surface: #101b2e;
  --slab-line: rgba(255, 255, 255, .1);
  --slab-ink: #f3f7fc;
  --slab-muted: #a9b8cc;
  --slab-blue: #1e7ee0;
  --slab-blue-2: #4aa3ff;
  --slab-holo: linear-gradient(115deg, #7cf3d4 0%, #8fb8ff 35%, #d6a8ff 65%, #ffd59a 100%);
  /* Tokens the shared Grade Advisor studio styles read. */
  --collector-line: rgba(255, 255, 255, .14);
  --collector-mint: #6ce5b1;
  --collector-warm: #ffd59a;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--slab-bg);
  color: var(--slab-ink);
  font: 16px/1.55 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--slab-blue-2); }
.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -999px; top: 8px; background: #fff; color: #000; padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip-link:focus { left: 8px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 20px; border-radius: 12px;
  font: inherit; font-weight: 650; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 3px solid var(--slab-blue-2); outline-offset: 2px; }
.btn-primary { background: var(--slab-blue); color: #fff; }
.btn-primary:hover { background: #2b8cf0; }
.btn-ghost { background: transparent; color: var(--slab-ink); border-color: var(--slab-line); }

/* Header */
.slab-header { position: sticky; top: 0; z-index: 5; background: rgba(7, 13, 24, .86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--slab-line); }
.slab-nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.slab-brand { display: flex; align-items: center; gap: 10px; color: var(--slab-ink); text-decoration: none; }
.slab-brand img { width: 34px; height: 34px; }
.slab-brand strong { display: block; font-size: 20px; letter-spacing: -.01em; }
.slab-brand small { display: block; color: var(--slab-muted); font-size: 12px; margin-top: -2px; }
.slab-nav-links { display: flex; align-items: center; gap: 20px; }
.slab-nav-links a { color: var(--slab-muted); text-decoration: none; font-size: 15px; }
.slab-nav-links a:hover { color: var(--slab-ink); }
.slab-nav-links .btn { min-height: 40px; padding: 0 16px; color: #fff; }

/* Hero */
.slab-hero { position: relative; padding: 56px 0 72px; overflow: hidden; }
.slab-hero::before {
  content: ""; position: absolute; inset: -40% -10% auto auto; width: 70%; height: 120%;
  background: radial-gradient(closest-side, rgba(30, 126, 224, .28), transparent 70%);
  pointer-events: none;
}
.slab-hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 520px); gap: 48px; align-items: start; }
.slab-eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; background: var(--slab-holo); -webkit-background-clip: text; background-clip: text; color: transparent; }
.slab-hero h1 { margin: 12px 0 16px; font-size: clamp(38px, 6vw, 64px); line-height: 1.02; letter-spacing: -.03em; }
.slab-lead { margin: 0 0 24px; max-width: 560px; color: #d1ddec; font-size: 19px; }
.slab-axes { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 28px; padding: 0; list-style: none; }
.slab-axes li { padding: 6px 12px; border: 1px solid var(--slab-line); border-radius: 999px; color: var(--slab-ink); font-size: 14px; background: rgba(255, 255, 255, .04); }
.slab-hero-points { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; color: var(--slab-muted); }
.slab-hero-points li { display: flex; gap: 10px; }
.slab-hero-points li::before { content: "✦"; color: var(--collector-mint); }

/* Slab visual */
.slab-visual { display: flex; gap: 14px; margin-top: 32px; }
.slab-case {
  position: relative; width: 132px; padding: 10px; border-radius: 14px;
  background: linear-gradient(160deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .04));
  border: 1px solid rgba(255, 255, 255, .22); box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
}
.slab-case:nth-child(2) { transform: translateY(14px) rotate(2deg); }
.slab-case-label { height: 34px; border-radius: 6px; background: var(--slab-bg-2); display: flex; align-items: center; justify-content: space-between; padding: 0 8px; margin-bottom: 8px; position: relative; overflow: hidden; }
.slab-case-label::after { content: ""; position: absolute; inset: 0; background: var(--slab-holo); opacity: .18; }
.slab-case-label span { font-size: 9px; color: var(--slab-muted); letter-spacing: .06em; }
.slab-case-label b { font-size: 18px; position: relative; z-index: 1; }
.slab-case img { display: block; border-radius: 6px; aspect-ratio: 300 / 386; object-fit: cover; }

/* Sections */
.slab-section { padding: 72px 0; border-top: 1px solid var(--slab-line); }
.slab-section h2 { margin: 8px 0 12px; font-size: clamp(28px, 4vw, 40px); letter-spacing: -.02em; line-height: 1.1; }
.slab-section > .wrap > p { max-width: 680px; color: var(--slab-muted); font-size: 18px; margin: 0 0 32px; }
.slab-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.slab-card { padding: 22px; border: 1px solid var(--slab-line); border-radius: 16px; background: var(--slab-surface); }
.slab-card h3 { margin: 0 0 8px; font-size: 18px; }
.slab-card p { margin: 0; color: var(--slab-muted); font-size: 15px; }
.slab-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; counter-reset: step; margin: 0; padding: 0; list-style: none; }
.slab-steps li { counter-increment: step; padding: 22px; border: 1px solid var(--slab-line); border-radius: 16px; background: var(--slab-surface); }
.slab-steps li::before { content: counter(step); display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--slab-blue); font-weight: 700; margin-bottom: 12px; }
.slab-steps strong { display: block; font-size: 18px; margin-bottom: 6px; }
.slab-steps span { color: var(--slab-muted); font-size: 15px; }
.slab-evidence { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: center; }
.slab-evidence-sample { padding: 20px; border-radius: 16px; border: 1px solid var(--slab-line); background: var(--slab-surface); font-size: 15px; }
.slab-evidence-sample dl { display: grid; grid-template-columns: auto 1fr; gap: 10px 16px; margin: 0; }
.slab-evidence-sample dt { font-weight: 700; }
.slab-evidence-sample dd { margin: 0; color: var(--slab-muted); }
.slab-evidence-sample .slab-sample-tag { display: inline-block; margin-bottom: 12px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--slab-muted); }
.slab-cta-band { text-align: center; }
.slab-section.slab-cta-band > .wrap > p { margin: 0 auto 32px; }

/* Explore a real slab */
.slab-real-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: start; }
.slab-real-scans { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 0; }
.slab-real-scans img { display: block; width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--slab-line); box-shadow: 0 16px 36px rgba(0, 0, 0, .45); }
.slab-real-scans figcaption { grid-column: 1 / -1; color: var(--slab-muted); font-size: 13px; text-align: center; }
.slab-real-record { padding: 24px; border: 1px solid var(--slab-line); border-radius: 16px; background: var(--slab-surface); }
.slab-real-set { display: block; color: var(--slab-muted); font-size: 14px; }
.slab-real-record h3 { margin: 4px 0 12px; font-size: 26px; letter-spacing: -.01em; }
.slab-real-grade { display: flex; align-items: center; gap: 12px; margin: 0 0 16px; }
.slab-real-grade b { display: inline-grid; place-items: center; min-width: 56px; height: 56px; padding: 0 10px; border-radius: 14px; background: var(--slab-holo); color: var(--slab-bg); font-size: 28px; }
.slab-real-grade span { color: var(--slab-ink); font-weight: 650; }
.slab-real-record .slab-axes { margin-bottom: 16px; }
.slab-real-why { margin: 0 0 8px; color: #d1ddec; }
.slab-real-meta { margin: 0 0 6px; color: var(--slab-muted); font-size: 14px; }
.slab-real-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin: 20px 0 16px; }
.slab-real-qr { display: flex; align-items: center; gap: 12px; max-width: 340px; color: var(--slab-muted); font-size: 13px; }
.slab-real-qr svg { flex: none; width: 148px; height: 148px; image-rendering: pixelated; shape-rendering: crispEdges; }
.slab-real-transfer { margin: 0; padding-top: 16px; border-top: 1px solid var(--slab-line); color: var(--slab-muted); font-size: 14px; }

/* Footer */
.slab-footer { padding: 32px 0 48px; border-top: 1px solid var(--slab-line); color: var(--slab-muted); font-size: 14px; }
.slab-footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.slab-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.slab-footer a { color: var(--slab-muted); }
.slab-legal { margin: 16px 0 0; max-width: 860px; font-size: 13px; }

/* Studio placement inside the hero */
.slab-hero .marketing-grade-studio { margin: 0; }

@media (max-width: 980px) {
  .slab-real-grid { grid-template-columns: 1fr; gap: 24px; }
  .slab-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .slab-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slab-evidence { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .slab-nav-links a:not(.btn) { display: none; }
  .slab-hero { padding: 32px 0 48px; }
  .slab-grid, .slab-steps { grid-template-columns: 1fr; }
  .slab-visual { display: none; }
  .slab-section { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn:hover { transform: none; }
}