/* ─── fünfpluszwei Blog — shared styles ───────────────────────────
   Self-hosted fonts via /fonts.css (no external CDN, DSGVO-safe).
   Brand CI: Navy #111 · Nebelblau #B8C9D9 (decor) · Accent Strong #5E7A97 (text/links) */

:root {
  --navy: #111111;
  --text: #1a1a1a;
  --muted: #555555;
  --subtle: #8a8a8a;
  --border: #E8E8E8;
  --bg: #FFFFFF;
  --bg-alt: #FAFAFA;
  --accent: #B8C9D9;        /* Nebelblau — decorative fills */
  --accent-strong: #5E7A97; /* Accent Strong — links, text on white */
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --head: 'Roboto', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--navy); color: #fff; }

a { color: var(--accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; height: auto; display: block; }

/* ─── Top bar ─── */
.blog-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.blog-nav .brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--head); font-weight: 700; font-size: 14px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--navy);
}
.blog-nav .brand svg { height: 18px; width: auto; }
.blog-nav .brand:hover { text-decoration: none; }
.blog-nav .dot { color: var(--accent-strong); }
.blog-nav .back {
  font-size: 12px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted);
}

/* ─── Layout ─── */
.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ─── Article header ─── */
.post-header { padding: 72px 0 40px; }
.eyebrow {
  font-size: 11px; font-weight: 700; letter-spacing: .22em;
  text-transform: uppercase; color: var(--accent-strong); margin-bottom: 20px;
}
h1.post-title {
  font-family: var(--head); font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.08;
  letter-spacing: -.02em; color: var(--navy); margin-bottom: 20px;
}
.post-lead {
  font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.6;
  color: var(--muted); font-weight: 300; margin-bottom: 28px;
}
.post-meta {
  display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center;
  font-size: 13px; color: var(--subtle);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.post-meta .sep { color: var(--border); }

.cover { margin: 40px 0 8px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.cover svg, .cover img { width: 100%; display: block; }

/* ─── Article body ─── */
.post-body { padding: 24px 0 40px; font-size: 1.075rem; }
.post-body h2 {
  font-family: var(--head); font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.2;
  color: var(--navy); margin: 52px 0 16px; letter-spacing: -.01em;
}
.post-body h3 {
  font-family: var(--head); font-weight: 700; font-size: 1.25rem;
  color: var(--navy); margin: 36px 0 12px;
}
.post-body p { margin-bottom: 20px; color: var(--text); }
.post-body ul, .post-body ol { margin: 0 0 22px 1.2em; }
.post-body li { margin-bottom: 10px; }
.post-body strong { font-weight: 600; color: var(--navy); }
.post-body a { border-bottom: 1px solid var(--accent); }

.lead-in::first-letter {
  font-family: var(--head); font-weight: 800; font-size: 3.4rem;
  float: left; line-height: 0.82; padding: 6px 10px 0 0; color: var(--navy);
}

/* ─── Stat callout (key AEO device: quotable, extractable numbers) ─── */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  margin: 32px 0;
}
.stat {
  background: var(--bg); padding: 24px 20px;
}
.stat .num {
  font-family: var(--head); font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1; color: var(--navy);
  letter-spacing: -.02em;
}
.stat .num .accent { color: var(--accent-strong); }
.stat .label { font-size: 13px; color: var(--muted); margin-top: 10px; line-height: 1.45; }
.stat .src { font-size: 11px; color: var(--subtle); margin-top: 6px; }

/* ─── Pull quote ─── */
.pullquote {
  border-left: 3px solid var(--accent); padding: 8px 0 8px 24px;
  margin: 32px 0; font-family: var(--head); font-weight: 600;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem); line-height: 1.35; color: var(--navy);
}

/* ─── Key-takeaway box (answer-engine bait) ─── */
.tldr {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: 10px; padding: 24px 26px; margin: 32px 0;
}
.tldr .tldr-label {
  font-size: 11px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent-strong); margin-bottom: 12px;
}
.tldr p { margin: 0; font-size: 1rem; color: var(--text); }
.tldr ul { margin: 8px 0 0 1.1em; }
.tldr li { margin-bottom: 6px; font-size: .98rem; }

/* ─── In-post FAQ ─── */
.post-faq { margin: 40px 0; }
.post-faq details {
  border-bottom: 1px solid var(--border); padding: 6px 0;
}
.post-faq summary {
  cursor: pointer; list-style: none; padding: 16px 0;
  font-family: var(--head); font-weight: 600; font-size: 1.1rem; color: var(--navy);
  display: flex; justify-content: space-between; gap: 16px;
}
.post-faq summary::-webkit-details-marker { display: none; }
.post-faq summary::after { content: "+"; color: var(--accent-strong); font-size: 1.4rem; line-height: 1; }
.post-faq details[open] summary::after { content: "−"; }
.post-faq details p { padding: 0 0 18px; color: var(--muted); }

/* ─── Sources ─── */
.sources { margin: 40px 0; font-size: 14px; color: var(--muted); }
.sources h2 { font-size: 1.1rem !important; margin: 0 0 12px !important; }
.sources ol { margin-left: 1.2em; }
.sources li { margin-bottom: 8px; }

/* ─── CTA band ─── */
.cta-band {
  background: var(--navy); color: #fff; border-radius: 14px;
  padding: 44px 40px; margin: 56px 0; text-align: center;
}
.cta-band h2 { font-family: var(--head); font-weight: 700; font-size: 1.7rem; color: #fff; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,0.6); margin-bottom: 24px; font-weight: 300; }
.cta-band a.btn {
  display: inline-block; background: #fff; color: var(--navy);
  padding: 14px 32px; font-size: 12px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; border-radius: 4px;
}
.cta-band a.btn:hover { background: var(--accent); text-decoration: none; }

/* ─── Blog index cards ─── */
.index-head { padding: 80px 0 24px; }
.index-head h1 { font-family: var(--head); font-weight: 800; font-size: clamp(2.2rem,5vw,3.4rem); color: var(--navy); letter-spacing: -.02em; }
.index-head p { color: var(--muted); font-weight: 300; font-size: 1.15rem; margin-top: 14px; max-width: 560px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 28px; padding: 24px 0 80px; }
.post-card {
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  display: flex; flex-direction: column; transition: transform .3s, box-shadow .3s;
  background: var(--bg);
}
.post-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(17,17,17,0.08); text-decoration: none; }
.post-card .card-cover svg, .post-card .card-cover img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.post-card .card-body { padding: 22px 22px 26px; }
.post-card .card-tag { font-size: 11px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-strong); }
.post-card h2 { font-family: var(--head); font-weight: 700; font-size: 1.25rem; color: var(--navy); margin: 10px 0; line-height: 1.25; }
.post-card p { font-size: .95rem; color: var(--muted); font-weight: 300; }
.post-card .card-meta { font-size: 12px; color: var(--subtle); margin-top: 14px; }

/* ─── Footer ─── */
.blog-footer {
  border-top: 1px solid var(--border); background: var(--bg-alt);
  padding: 28px 24px; display: flex; justify-content: space-between;
  align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 12px; color: var(--subtle);
}
.blog-footer a { color: var(--subtle); }

@media (max-width: 600px) {
  .post-header { padding: 48px 0 28px; }
  .lead-in::first-letter { font-size: 2.8rem; }
}