:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-border: rgba(17, 24, 39, 0.08);
  --text: #111827;
  --muted: #4b5563;
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --surface: rgba(17, 24, 39, 0.92);
    --surface-border: rgba(255, 255, 255, 0.08);
    --text: #f8fafc;
    --muted: #cbd5e1;
    --accent: #2dd4bf;
    --accent-soft: rgba(45, 212, 191, 0.12);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background:
      radial-gradient(circle at top right, rgba(15, 118, 110, 0.12), transparent 28%),
      radial-gradient(circle at left 20%, rgba(59, 130, 246, 0.1), transparent 24%),
      var(--bg);
  color: var(--text);
  font-family:
      -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
      Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
}

.shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.page-header,
.panel,
.section-card,
.link-card {
  border: 1px solid var(--surface-border);
  background: var(--surface);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.page-header {
  padding: 28px;
  margin-bottom: 20px;
}

.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}

h1 {
  margin: 16px 0 8px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.12;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.35rem;
  line-height: 1.25;
}

h3 {
  margin: 20px 0 10px;
  font-size: 1.05rem;
}

p,
ul,
ol {
  margin: 0 0 16px;
}

ul,
ol {
  padding-left: 1.3rem;
}

.lede,
.meta,
.muted {
  color: var(--muted);
}

.meta {
  margin-top: 4px;
  font-size: 0.96rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.nav a {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  text-decoration: none;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.panel {
  padding: 24px;
  margin-bottom: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.link-card {
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: transform 120ms ease, border-color 120ms ease;
}

.link-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.link-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.95rem;
}

.small-list {
  margin-top: 8px;
}