:root {
  --bg: #f7f5f1;
  --card: #ffffff;
  --ink: #1b1a22;
  --muted: #5d5a68;
  --line: rgba(27, 26, 34, 0.12);
  --accent: #c25a12;
  --accent-2: #0f8f72;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #05070f;
    --card: #0d1120;
    --ink: #f2efe9;
    --muted: #a3a0b0;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #ffb35c;
    --accent-2: #3ef2c6;
  }
}
:root[data-theme="dark"] {
  --bg: #05070f;
  --card: #0d1120;
  --ink: #f2efe9;
  --muted: #a3a0b0;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ffb35c;
  --accent-2: #3ef2c6;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
header img { width: 64px; height: 64px; border-radius: 16px; box-shadow: 0 8px 24px -10px rgba(0, 0, 0, 0.5); }
header h1 { margin: 0; font-size: 28px; line-height: 1.15; letter-spacing: -0.02em; }
header p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }
nav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
nav a {
  padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 600;
}
nav a[aria-current="page"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.summary {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 18px 20px; margin-bottom: 28px;
}
.summary strong { color: var(--accent-2); }
h2 { font-size: 20px; margin: 32px 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { color: var(--ink); }
ul { padding-left: 22px; }
a { color: var(--accent); }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); padding-top: 16px; }