:root {
  --bg: #f2f4f7; --surface: #ffffff; --ink: #14171c; --ink2: #3d4450; --muted: #6b7380;
  --line: #e1e5eb; --accent: #1d44c4; --bull: #16775a; --bear: #b23a2e;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e1116; --surface: #171b22; --ink: #eef1f5; --ink2: #c5cbd4; --muted: #8b93a0;
          --line: #262c35; --accent: #7d9cff; --bull: #4cc497; --bear: #f0776a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink2);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif; }
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 32px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
header .name { font-weight: 650; color: var(--ink); font-size: 18px; }
header .tag { color: var(--muted); font-size: 14px; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { color: var(--ink); font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
.date { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
h2 { color: var(--ink); font-size: 18px; margin: 32px 0 8px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; margin: 20px 0; }
.card p:first-child { margin-top: 0; } .card p:last-child { margin-bottom: 0; }
.lead { font-size: 17px; color: var(--ink); }
ul { padding-left: 20px; } li { margin: 4px 0; }
code { font: 14px ui-monospace, "SF Mono", Menlo, monospace; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
footer { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
@media (max-width: 480px) { header { flex-wrap: wrap; } nav { margin-left: 0; width: 100%; } h1 { font-size: 26px; } }