:root {
  color-scheme: light;
  --bg: #f4f8f7;
  --surface: #ffffff;
  --surface-muted: #ebf3f1;
  --text: #142222;
  --muted: #4f6763;
  --line: #d6e4e0;
  --accent: #56d6b8;
  --accent-strong: #0f7f67;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #f9fcfb 0%, var(--bg) 46%, #e9f2f0 100%);
  color: var(--text);
  line-height: 1.6;
}

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

.shell {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 64px;
}

.hero {
  background: linear-gradient(145deg, #102120 0%, #183332 100%);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 28px;
  padding: 28px;
  box-shadow: 0 24px 60px rgba(13, 28, 27, 0.18);
}

.hero h1,
.page h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero p,
.page .lead {
  margin: 0;
  max-width: 60ch;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.02rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card,
.page,
.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 16px 40px rgba(28, 50, 47, 0.08);
}

.card {
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: #bad7cf;
  box-shadow: 0 18px 42px rgba(28, 50, 47, 0.12);
}

.card h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

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

.page {
  margin-top: 18px;
  padding: 28px;
}

.page h2 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.page ul,
.page ol {
  padding-left: 20px;
}

.page li + li {
  margin-top: 8px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

.nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.callout {
  margin-top: 18px;
  padding: 18px 20px;
  background: linear-gradient(180deg, #fbfdfd 0%, #f2f7f6 100%);
}

.callout strong {
  color: var(--text);
}

code {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  background: #eef4f3;
  border-radius: 8px;
  padding: 0.12rem 0.38rem;
  font-size: 0.92em;
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 20px, 900px);
    padding-top: 20px;
  }

  .hero,
  .page {
    border-radius: 22px;
    padding: 22px;
  }
}