/* OCC-specific vars only — all base colors come from theme.css */
:root {
  --green:    #2ecc71;
  --red:      #e74c3c;
  --yellow:   #f39c12;
  --blue:     #3b82f6;
  --surface2: #111111;
  --radius:   10px;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --gold-rgb: 212,175,55;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; line-height: 1.6; min-height: 100vh; }

/* NAV */
.nav { position: sticky; top: 0; z-index: 100; background: rgba(0,0,0,.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); padding: 0 32px; display: flex; align-items: center; height: 56px; gap: 32px; }
.nav-brand { font-size: 17px; font-weight: 800; letter-spacing: -0.5px; color: var(--accent); text-decoration: none; white-space: nowrap; }
.nav-brand span { color: var(--text); font-weight: 400; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 500; padding: 6px 12px; border-radius: 6px; transition: all .15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--surface2); }
.nav-links a.active { color: var(--accent); }

/* HERO */
.hero { padding: 80px 32px 64px; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-tag { display: inline-block; background: rgba(212,175,55,.1); border: 1px solid rgba(212,175,55,.25); color: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; padding: 4px 12px; border-radius: 20px; margin-bottom: 24px; }
.hero h1 { font-size: clamp(36px, 6vw, 64px); font-weight: 900; letter-spacing: -2px; line-height: 1.05; margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { font-size: 18px; color: var(--muted); max-width: 560px; margin: 0 auto 36px; line-height: 1.7; }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 8px; font-size: 14px; font-weight: 700; cursor: pointer; text-decoration: none; border: none; transition: all .15s; }
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { opacity: .85; transform: translateY(-1px); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 7px 14px; font-size: 12px; }

/* SECTIONS */
.section { padding: 64px 32px; max-width: 1100px; margin: 0 auto; }
.section-title { font-size: 26px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 8px; }
.section-sub { color: var(--muted); font-size: 15px; margin-bottom: 40px; }
.divider { border: none; border-top: 1px solid var(--border); margin: 0; }

/* CARDS */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card-grid { display: grid; gap: 16px; }
.card-grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card-grid-2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.card-icon { font-size: 28px; margin-bottom: 12px; }
.card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.card p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* DEMO */
.demo-wrap { max-width: 680px; margin: 0 auto; }
.demo-input-row { display: flex; gap: 12px; margin-bottom: 16px; }
.occ-input { flex: 1; padding: 16px 20px; background: var(--surface); border: 2px solid var(--border); border-radius: 8px; color: var(--text); font-size: 28px; font-family: var(--mono); font-weight: 700; text-align: center; text-transform: uppercase; max-width: 100px; transition: border-color .15s; outline: none; }
.occ-input:focus { border-color: var(--accent); }
.quick-codes { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.quick-btn { width: 44px; height: 44px; background: var(--surface2); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-family: var(--mono); font-size: 16px; font-weight: 700; cursor: pointer; transition: all .12s; display: flex; align-items: center; justify-content: center; }
.quick-btn:hover { background: var(--accent); color: #000; border-color: var(--accent); }
.result-box { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px; min-height: 120px; font-family: var(--mono); font-size: 13px; line-height: 1.7; transition: border-color .2s; }
.result-box.ok { border-color: var(--green); }
.result-box.not_found { border-color: var(--yellow); }
.result-box.error { border-color: var(--red); }
.result-key { color: var(--muted); }
.result-val { color: var(--text); }
.result-val.ok { color: var(--green); }
.result-val.not_found { color: var(--yellow); }
.result-val.error { color: var(--red); }
.result-ms { color: var(--accent); font-weight: 700; }
.result-empty { color: var(--muted); font-style: italic; font-family: var(--font); font-size: 14px; text-align: center; padding: 20px 0; }
.live-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; color: var(--green); letter-spacing: .5px; }
.live-dot { width: 7px; height: 7px; background: var(--green); border-radius: 50%; animation: pulse 1.8s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.8)} }

/* OCC TILES */
.board-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px 16px; cursor: pointer; transition: all .15s; position: relative; overflow: hidden; }
.tile:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,175,55,.1); }
.tile.active-tile { border-color: var(--accent); }
.tile-code { font-family: var(--mono); font-size: 48px; font-weight: 900; color: var(--accent); line-height: 1; margin-bottom: 10px; }
.tile-name { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.tile-desc { font-size: 11px; color: var(--muted); }
.tile-badge { position: absolute; top: 10px; right: 10px; width: 8px; height: 8px; border-radius: 50%; }
.tile-badge.on { background: var(--green); }
.tile-badge.off { background: var(--muted); }
.tile-result { background: var(--surface2); border-top: 1px solid var(--border); border-radius: 0 0 8px 8px; padding: 10px 14px; font-size: 11px; font-family: var(--mono); color: var(--muted); margin: 10px -16px -20px; }

/* PROOF / STATS */
.stats-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; min-width: 120px; text-align: center; flex: 1; }
.stat-val { font-size: 28px; font-weight: 900; font-family: var(--mono); color: var(--accent); }
.stat-lbl { font-size: 11px; color: var(--muted); margin-top: 2px; text-transform: uppercase; letter-spacing: .5px; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th { text-align: left; padding: 10px 16px; color: var(--muted); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; border-bottom: 1px solid var(--border); }
.compare-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td:first-child { color: var(--muted); font-size: 13px; }
.better { color: var(--green); font-weight: 700; }
.worse { color: var(--red); }
.bench-log { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px; font-family: var(--mono); font-size: 12px; color: var(--muted); max-height: 220px; overflow-y: auto; line-height: 1.8; }
.bench-log span.t { color: var(--accent); }

/* ARCHITECTURE */
.arch-diagram { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 32px; font-family: var(--mono); font-size: 13px; line-height: 1.8; color: var(--code); overflow-x: auto; }
.arch-diagram .node { color: var(--accent); font-weight: 700; }
.arch-diagram .arrow { color: var(--muted); }
.arch-diagram .label { color: var(--text); }
.arch-diagram .locked { color: var(--green); }
.arch-diagram .warn { color: var(--yellow); }
.principle-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.principle { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.principle-num { font-family: var(--mono); font-size: 32px; font-weight: 900; color: var(--border); line-height: 1; margin-bottom: 8px; }
.principle h4 { font-size: 14px; font-weight: 700; margin-bottom: 6px; color: var(--accent); }
.principle p { font-size: 12px; color: var(--muted); line-height: 1.6; }

/* FOOTER */
.footer { border-top: 1px solid var(--border); padding: 24px 32px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.footer-brand { font-size: 14px; font-weight: 700; color: var(--muted); }
.footer-brand strong { color: var(--accent); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 12px; color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.engine-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(212,175,55,.08); border: 1px solid rgba(212,175,55,.2); border-radius: 20px; padding: 4px 12px; font-size: 11px; color: var(--accent); font-weight: 600; }

/* BADGE */
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 700; }
.badge-green { background: rgba(46,204,113,.15); color: var(--green); }
.badge-red { background: rgba(231,76,60,.15); color: var(--red); }
.badge-yellow { background: rgba(243,156,18,.15); color: var(--yellow); }
.badge-blue { background: rgba(59,130,246,.15); color: var(--blue); }

/* UTILS */
.text-accent { color: var(--accent); }
.text-muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }

@media (max-width: 640px) {
  .nav { padding: 0 16px; gap: 16px; }
  .hero { padding: 48px 16px 40px; }
  .section { padding: 40px 16px; }
  .footer { flex-direction: column; text-align: center; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 6px 8px; font-size: 12px; }
}