:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1c2330;
  --muted: #5b6475;
  --line: #e3e6ec;
  --accent: #0b7fb3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1626;
    --card: #172036;
    --text: #e8ecf3;
    --muted: #a3adbf;
    --line: #26314a;
    --accent: #7dd3fc;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}
header img { width: 56px; height: 56px; }
header .name { font-weight: 650; font-size: 1.15rem; }
header .sub { color: var(--muted); font-size: 0.9rem; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 0.95rem; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px 28px 20px;
}
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 4px; }
.stand { color: var(--muted); margin: 0 0 24px; font-size: 0.9rem; }
h2 { font-size: 1.1rem; margin: 28px 0 8px; }
ul { padding-left: 1.2em; }
li { margin: 4px 0; }
footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}
@media (max-width: 560px) {
  header { flex-wrap: wrap; }
  nav { margin-left: 0; width: 100%; }
  .card { padding: 20px 16px 12px; }
}