:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #0b1a4a;
  --muted: #55627f;
  --border: #e3e8f2;
  --accent: #1e6bff;
  --accent-soft: #e8f0ff;
  --on-accent: #ffffff;
  --brand-gradient: linear-gradient(135deg, #19e3d0 0%, #4be38f 100%);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a1024;
    --surface: #111a36;
    --text: #eef2ff;
    --muted: #a3afcc;
    --border: #22305a;
    --accent: #6ea0ff;
    --accent-soft: #1a2a55;
    --on-accent: #0a1024;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand span {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  margin-left: 20px;
}

.site-header nav a:hover {
  color: var(--text);
}

main {
  padding: 56px 0 72px;
}

.hero {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  align-items: center;
}

.hero img {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  box-shadow: 0 12px 32px rgba(11, 26, 74, 0.18);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h2 {
  margin: 48px 0 12px;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 28px 0 8px;
  font-size: 1.1rem;
}

.lead {
  margin: 0;
  font-size: 1.15rem;
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-block;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  background: var(--accent);
  color: var(--on-accent);
}

.button.secondary {
  background: var(--accent-soft);
  color: var(--accent);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.card h3 {
  margin-top: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 8px 32px 32px;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose .updated {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
}

@media (max-width: 600px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero img {
    width: 88px;
    height: 88px;
    border-radius: 20px;
  }

  .prose {
    padding: 4px 18px 24px;
  }

  .site-header nav a {
    margin-left: 14px;
  }
}