:root {
  color-scheme: light dark;
  --bg: oklch(98% 0.01 95);
  --surface: color-mix(in oklab, white 84%, #dbe4ff 16%);
  --surface-strong: rgba(255, 255, 255, 0.82);
  --text: oklch(27% 0.03 258);
  --text-soft: oklch(46% 0.02 255);
  --accent: oklch(57% 0.19 257);
  --accent-soft: oklch(92% 0.04 258);
  --border: rgba(100, 116, 139, 0.18);
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(19% 0.02 260);
    --surface: color-mix(in oklab, #0f172a 82%, #1e293b 18%);
    --surface-strong: rgba(15, 23, 42, 0.82);
    --text: oklch(95% 0.01 255);
    --text-soft: oklch(76% 0.02 255);
    --accent: oklch(76% 0.11 255);
    --accent-soft: rgba(96, 165, 250, 0.14);
    --border: rgba(148, 163, 184, 0.18);
    --shadow: 0 30px 70px rgba(2, 8, 23, 0.45);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  color: var(--text);
  background:
    radial-gradient(circle at top, var(--accent-soft), transparent 32%),
    linear-gradient(180deg, color-mix(in oklab, var(--bg) 88%, white 12%), var(--bg));
}

a {
  color: inherit;
}

.page-shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(1.5rem, 2vw, 2.5rem) 0 4rem;
}

.hero,
.card {
  background: var(--surface-strong);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero {
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: 2rem;
}

.eyebrow,
.section-label,
.meta {
  color: var(--text-soft);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1,
h2,
h3 {
  line-height: 1.1;
  margin: 0;
}

h1 {
  margin-top: 0.35rem;
  font-size: clamp(2.8rem, 8vw, 5.5rem);
}

h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
}

h3 {
  font-size: 1.35rem;
}

.hero-copy,
.prose p,
.card p {
  max-width: 65ch;
  color: var(--text-soft);
}

.hero-nav,
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-nav {
  margin-top: 1.75rem;
}

.hero-nav a,
.post-link {
  padding: 0.8rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  background: var(--accent-soft);
  border: 1px solid transparent;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.hero-nav a:hover,
.post-link:hover,
.card h3 a:hover {
  transform: translateY(-1px);
  border-color: var(--border);
}

.section {
  margin-top: 2rem;
}

.section-heading {
  margin-bottom: 1rem;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  border-radius: 1.5rem;
  padding: 1.5rem;
}

.card h3 {
  margin-top: 0.55rem;
}

.card h3 a {
  text-decoration: none;
}

.archive-list ul {
  padding-left: 1.2rem;
}

.archive-list li + li {
  margin-top: 0.45rem;
}

.post-layout {
  width: min(820px, calc(100% - 2rem));
}

.post-header {
  margin-bottom: 1.5rem;
}

.post {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: 2rem;
}

.post p + p {
  margin-top: 1rem;
}

.post-footer {
  margin-top: 2rem;
}