:root {
  --fg: #d4d9e0;
  --fg-strong: #edf0f4;
  --bg: #0a0e13;
  --bg-surface: #0f1319;
  --muted: #6b7a8d;
  --accent: #0d9488;
  --accent-dim: rgba(13,148,136,.12);
  --accent-glow: rgba(13,148,136,.25);
  --border: rgba(255,255,255,.08);
  --border-accent: rgba(13,148,136,.3);
  --font-body: 'Outfit', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, 'Cascadia Code', monospace;
  --radius: 8px;
}

@media (prefers-color-scheme: light) {
  :root {
    --fg: #1f2937;
    --fg-strong: #0f172a;
    --bg: #f8f9fb;
    --bg-surface: #ffffff;
    --muted: #6b7280;
    --accent: #0d7d73;
    --accent-dim: rgba(13,125,115,.07);
    --accent-glow: rgba(13,125,115,.15);
    --border: rgba(15,23,42,.09);
    --border-accent: rgba(13,125,115,.25);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.tag {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: .18rem .5rem;
  white-space: nowrap;
}
.tag--accent { border-color: var(--border-accent); color: var(--accent); }

.article-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }

footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}

footer .impressum { flex-basis: 100%; font-size: .72rem; margin-top: .25rem; }

@media (prefers-reduced-motion: no-preference) {
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

/* ── Article layout (shared by article pages) ── */
.article-nav {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.article-header { margin-bottom: 2.5rem; }

.article-header h1 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 600;
  color: var(--fg-strong);
  letter-spacing: -.02em;
  line-height: 1.25;
  margin-bottom: .6rem;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--muted);
}

.article-body h2 {
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  font-weight: 600;
  color: var(--fg-strong);
  margin-top: 2.25rem;
  margin-bottom: .75rem;
  letter-spacing: -.01em;
}

.article-body p {
  max-width: 72ch;
  margin-bottom: .85rem;
}

.article-body strong {
  color: var(--fg-strong);
  font-weight: 500;
}

/* ── Article page layout ── */
.page--article {
  position: relative;
  z-index: 1;
  max-width: 740px;
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3rem) clamp(1rem, 4vw, 1.25rem) 4rem;
}

@media (max-width: 560px) {
  .page--article .article-body p { max-width: 100%; }
}

@media (prefers-reduced-motion: no-preference) {
  .page--article .article-header,
  .page--article .article-body { animation: fadeUp .5s ease both; }
  .page--article .article-body { animation-delay: .06s; }
}

.writing-list li + li { margin-top: .5rem; }

/* ── Related articles ── */
.article-related {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.article-related-heading {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  margin-bottom: .5rem;
  text-transform: uppercase;
  letter-spacing: .1em;
}

.article-related .writing-item {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem 1.1rem;
  transition: border-color .2s;
}

.article-related .writing-item + .writing-item {
  margin-top: .5rem;
}

.article-related .writing-item-title {
  font-size: .95rem;
  font-weight: 500;
  color: var(--fg-strong);
}

.article-related .writing-item-desc {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  margin-top: .2rem;
}