/* Übersichtsseite der Informatik-Labs -- Farben und Kopfzeile wie in den Labs */
:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1d2433;
  --muted: #5f6b7f;
  --line: #d5dae2;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --logo: #2a2068;
  --c-gate: #f59e0b;
  --c-bus: #dc2626;
  --c-code: #2563eb;
  --c-flow: #0d9488;
  --c-structo: #7c3aed;
  --radius: 14px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161f;
    --panel: #1b212d;
    --ink: #e6e9ef;
    --muted: #9aa5b7;
    --line: #2f3747;
    --accent: #5b8cff;
    --logo: #c9c3f2;
    --c-gate: #fbbf24;
    --c-bus: #f87171;
    --c-code: #5b8cff;
    --c-flow: #2dd4bf;
    --c-structo: #a78bfa;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.55; }
a { color: var(--accent); }
code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .92em; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: max(8px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 8px
           max(16px, env(safe-area-inset-left));
  min-height: 60px;
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.site-brand { display: flex; align-items: center; gap: 10px; color: var(--ink);
              max-width: 1200px; width: 100%; margin: 0 auto; }
.site-brand a { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; }
.site-brand .hs-link:hover .site-org { text-decoration: underline; }
.hs-logo { height: 30px; width: auto; color: var(--logo); flex: none; }
.site-org { font-weight: 600; color: var(--logo); }
.site-name { font-weight: 800; padding-left: 10px; border-left: 2px solid var(--line); }

main { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* Einstieg */
.hero { padding: 56px 0 32px; max-width: 820px; }
.eyebrow { margin: 0 0 8px; font-weight: 700; color: var(--muted); text-transform: uppercase;
           letter-spacing: .08em; font-size: .8rem; }
.hero h1 { margin: 0 0 16px; font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; letter-spacing: -.02em; }
.lead { margin: 0 0 20px; font-size: 1.15rem; color: var(--muted); }
.facts { list-style: none; padding: 0; margin: 0 0 28px; display: flex; flex-wrap: wrap; gap: 8px 20px;
         color: var(--muted); font-size: .95rem; }
.facts li::before { content: "✓"; color: var(--accent); font-weight: 800; margin-right: 6px; }
.facts strong { color: var(--ink); }
.jump { display: flex; flex-wrap: wrap; gap: 8px; }
.jump a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 999px;
          background: var(--panel); border: 1px solid var(--line); color: var(--ink); text-decoration: none;
          font-weight: 600; }
.jump a:hover { border-color: var(--accent); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c); }

/* So funktioniert es */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 8px 0 48px; }
.step { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.step h3 { margin: 10px 0 6px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: .95rem; }
.num { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
       background: var(--accent); color: var(--accent-ink); font-weight: 800; }

/* Ein Lab */
.lab { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 36px; align-items: center;
       padding: 36px 0; border-top: 1px solid var(--line); scroll-margin-top: 72px; }
.lab:nth-of-type(even) .lab-text { order: 2; }
.chapter { margin: 0 0 4px; font-size: .85rem; font-weight: 700; color: var(--muted); }
.lab h2 { margin: 0; font-size: 2rem; letter-spacing: -.01em; display: flex; align-items: center; gap: 12px; }
.lab h2::before { content: ""; width: 14px; height: 14px; border-radius: 4px; background: var(--c); flex: none; }
.tagline { margin: 4px 0 16px; font-size: 1.1rem; }
.lab h3 { margin: 0 0 6px; font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.lab ul { margin: 0 0 16px; padding-left: 1.2em; }
.lab li { margin: 4px 0; }
.lab li::marker { color: var(--c); }
.meta { margin: 0 0 18px; color: var(--muted); font-size: .92rem; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px;
       background: var(--accent); color: var(--accent-ink); font-weight: 700; text-decoration: none; }
.btn::after { content: "→"; }
.btn:hover { filter: brightness(1.08); }
.shot { margin: 0; }
.shot img { display: block; width: 100%; height: auto; border-radius: var(--radius);
            border: 1px solid var(--line); box-shadow: 0 12px 32px rgba(15, 23, 42, .12); }
.shot a { display: block; }

.lecture { border-top: 1px solid var(--line); padding: 36px 0 8px; max-width: 820px; }
.lecture h2 { margin: 0 0 8px; }
.lecture p { margin: 0; color: var(--muted); }

.site-footer { text-align: center; font-size: .8rem; color: var(--muted);
               padding: 40px 16px max(16px, env(safe-area-inset-bottom)); }
.site-footer a { color: inherit; }

@media (max-width: 860px) {
  .lab { grid-template-columns: 1fr; gap: 20px; }
  .lab:nth-of-type(even) .lab-text { order: 0; }
  .steps { grid-template-columns: 1fr; }
  .hero { padding-top: 36px; }
}
@media (max-width: 500px) {
  .site-org { display: none; }
  .site-name { padding-left: 0; border-left: 0; }
}