:root {
  color-scheme: light;
  --bg: #f6fbff;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #dbeafe;
  --brand: #0891b2;
  --brand-soft: #ecfeff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 500px at top right, #cffafe 0%, var(--bg) 45%);
  line-height: 1.6;
}
.wrap { width: min(980px, 92vw); margin: 0 auto; padding: 2rem 0 3rem; }
.hero { text-align: center; margin-bottom: 1.75rem; }
.brand {
  display: inline-block;
  margin-bottom: 0.9rem;
  text-decoration: none;
  color: var(--brand);
  font-weight: 700;
}
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3rem); line-height: 1.12; }
.hero p { color: var(--muted); margin: 0.75rem auto 0; max-width: 680px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.15rem;
  margin-bottom: 1rem;
}
.card h2 { margin: 0.2rem 0 0.4rem; font-size: 1.3rem; }
.card p { margin: 0; color: var(--muted); }
.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.35rem;
  color: #0e7490;
  font-size: 0.86rem;
}
.tag {
  display: inline-block;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  background: var(--brand-soft);
  border: 1px solid #bae6fd;
}
.read-link { text-decoration: none; color: var(--brand); font-weight: 600; }
.read-link:hover { text-decoration: underline; }
.article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(1rem, 3vw, 2rem);
}
.article h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 0.2rem 0 0.5rem; }
.article-meta { color: var(--muted); margin-bottom: 1.4rem; font-size: 0.95rem; }
.article a { color: var(--brand); }
.article pre {
  overflow: auto;
  padding: 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f8fafc;
}
.article blockquote {
  margin: 1rem 0;
  border-left: 4px solid #22d3ee;
  background: #ecfeff;
  padding: 0.75rem 1rem;
  border-radius: 8px;
}
.back-link { display: inline-block; margin-bottom: 1rem; color: var(--brand); text-decoration: none; font-weight: 600; }
.footer { margin-top: 2rem; text-align: center; color: var(--muted); font-size: 0.9rem; }