/* seestadt-guide.css — gemeinsames Stylesheet für die statischen SEO-Content-Seiten.
   Bewusst framework-frei + system-fonts = schneller LCP, kein Render-Blocking. */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --lake: #0ea5e9;
  --lake-dark: #0284c7;
  --ink: #0f172a;
  --slate: #334155;
  --muted: #64748b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --max: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f1f5f9;
    --slate: #cbd5e1;
    --muted: #94a3b8;
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
  }
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--slate);
  line-height: 1.7;
  font-size: 17px;
}

a { color: var(--lake-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.logo {
  font-weight: 800; font-size: 1.35rem; letter-spacing: -0.03em;
  color: var(--lake); text-transform: lowercase;
}
.logo:hover { text-decoration: none; }
.header-cta {
  background: var(--lake); color: #fff; font-weight: 700; font-size: 0.85rem;
  padding: 8px 16px; border-radius: 999px; transition: background .2s;
}
.header-cta:hover { background: var(--lake-dark); text-decoration: none; }

/* Hero */
.hero {
  padding: 64px 0 48px;
  background:
    radial-gradient(900px 360px at 80% -10%, color-mix(in srgb, var(--lake) 18%, transparent), transparent),
    var(--bg);
}
.eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--lake-dark);
  background: color-mix(in srgb, var(--lake) 12%, transparent);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}
h1 {
  font-size: clamp(2rem, 5.5vw, 3rem); line-height: 1.1; letter-spacing: -0.02em;
  color: var(--ink); font-weight: 800; margin-bottom: 18px;
}
.lead { font-size: 1.15rem; color: var(--slate); max-width: 620px; }

/* CTA buttons */
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 0.98rem; padding: 13px 24px; border-radius: 12px;
  transition: transform .15s, box-shadow .2s, background .2s;
}
.btn-primary {
  background: var(--lake); color: #fff;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--lake) 35%, transparent);
}
.btn-primary:hover { background: var(--lake-dark); transform: translateY(-2px); text-decoration: none; }
.btn-ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--lake); text-decoration: none; }

/* Content */
main { padding: 8px 0 56px; }
section { margin-top: 40px; }
h2 {
  font-size: clamp(1.4rem, 3.5vw, 1.8rem); color: var(--ink);
  letter-spacing: -0.01em; margin-bottom: 14px; font-weight: 800;
}
h3 { font-size: 1.15rem; color: var(--ink); margin: 24px 0 8px; font-weight: 700; }
p { margin-bottom: 16px; }
ul, ol { margin: 0 0 16px 22px; }
li { margin-bottom: 8px; }

/* Fact grid */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin: 24px 0; }
.fact {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px 20px;
}
.fact .k { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 700; }
.fact .v { font-size: 1.05rem; color: var(--ink); font-weight: 700; margin-top: 4px; }

/* Callout */
.callout {
  background: linear-gradient(135deg, color-mix(in srgb, var(--lake) 12%, var(--surface)), var(--surface));
  border: 1px solid color-mix(in srgb, var(--lake) 30%, var(--border));
  border-radius: 18px; padding: 28px; margin: 36px 0;
}
.callout h2 { margin-bottom: 8px; }

/* Related cards */
.related { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 16px; }
.card {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 22px; transition: border-color .2s, transform .15s;
}
.card:hover { border-color: var(--lake); transform: translateY(-2px); text-decoration: none; }
.card .card-t { font-weight: 800; color: var(--ink); font-size: 1.05rem; margin-bottom: 6px; }
.card .card-d { font-size: 0.9rem; color: var(--muted); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border); margin-top: 40px; padding: 32px 0;
  font-size: 0.88rem; color: var(--muted);
}
.site-footer .wrap { display: flex; flex-direction: column; gap: 14px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.foot-note { font-size: 0.8rem; line-height: 1.6; }

/* Breadcrumb */
.crumb { font-size: 0.82rem; color: var(--muted); padding-top: 20px; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--lake-dark); }