:root {
  --bg: #f4fbfa;
  --surface: #ffffff;
  --text: #16302e;
  --muted: #5b716f;
  --accent: #0f9488;
  --accent-soft: #d6f3ef;
  --border: #dbe9e7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1a19;
    --surface: #172524;
    --text: #e6f2f0;
    --muted: #9db3b0;
    --accent: #4fd1c1;
    --accent-soft: #1d3a37;
    --border: #26403d;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

header img {
  width: 64px;
  height: 64px;
  border-radius: 14px;
}

header .name {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
}

header .tagline {
  margin: 0;
  color: var(--muted);
}

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }

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

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 20px 0;
}

.callout {
  background: var(--accent-soft);
  border-radius: 16px;
  padding: 18px 22px;
  margin: 20px 0;
}

nav {
  display: flex;
  gap: 20px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

ul { padding-left: 1.2em; }
li { margin: 6px 0; }