:root {
  --bg: #0f1115;
  --fg: #e6e8ee;
  --muted: #9aa0ad;
  --accent: #6c8cff;
  --accent-2: #ffd866;
  --card: #181b22;
  --border: #262b35;
  --code-bg: #10131a;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; background: rgba(15,17,21,0.85);
  z-index: 10;
}
nav.site {
  display: flex; align-items: center; gap: 24px;
  padding: 16px 0;
}
nav.site .brand { font-weight: 700; font-size: 1.1rem; color: var(--fg); letter-spacing: .3px; }
nav.site .brand::before { content: "◆"; color: var(--accent-2); margin-right: 8px; }
nav.site .links { margin-left: auto; display: flex; gap: 20px; }
nav.site a { color: var(--muted); font-size: .95rem; }
nav.site a:hover { color: var(--fg); text-decoration: none; }
nav.site a.active { color: var(--fg); font-weight: 600; }

main { flex: 1; padding: 48px 0 72px; }

.hero { padding-top: 8px; }
.hero h1 { font-size: 2.3rem; line-height: 1.25; letter-spacing: -.5px; }
.hero p.sub { color: var(--muted); margin-top: 12px; font-size: 1.05rem; max-width: 60ch; }
.hero .tagline { color: var(--accent-2); margin-top: 8px; font-size: .95rem; }

.section-title {
  font-size: 1.05rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--muted); margin: 48px 0 20px;
}
.section-title::after { content: ""; display: block; width: 40px; height: 2px; background: var(--accent); margin-top: 8px; }

/* post lists */
ul.post-list { list-style: none; }
ul.post-list li {
  padding: 18px 0; border-bottom: 1px solid var(--border);
  display: flex; align-items: baseline; gap: 16px;
}
ul.post-list li:first-child { border-top: 1px solid var(--border); }
ul.post-list .date { color: var(--muted); font-size: .85rem; white-space: nowrap; font-variant-numeric: tabular-nums; }
ul.post-list a { color: var(--fg); font-weight: 600; font-size: 1.05rem; }
ul.post-list a:hover { color: var(--accent); text-decoration: none; }

/* article */
article.post h1 { font-size: 2rem; line-height: 1.3; letter-spacing: -.5px; }
article.post .meta { color: var(--muted); font-size: .9rem; margin: 10px 0 28px; }
article.post h2 { font-size: 1.4rem; margin: 32px 0 12px; color: var(--fg); }
article.post h3 { font-size: 1.15rem; margin: 26px 0 10px; color: var(--fg); }
article.post p { margin: 14px 0; }
article.post ul, article.post ol { margin: 14px 0 14px 24px; }
article.post li { margin: 6px 0; }
article.post code {
  background: var(--code-bg); border: 1px solid var(--border);
  padding: 2px 6px; border-radius: 4px; font-size: .88em;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}
article.post pre {
  background: var(--code-bg); border: 1px solid var(--border);
  padding: 16px; border-radius: 8px; overflow-x: auto; margin: 16px 0;
}
article.post pre code { background: none; border: none; padding: 0; }
article.post blockquote {
  border-left: 3px solid var(--accent); padding-left: 16px;
  color: var(--muted); margin: 16px 0; font-style: italic;
}
article.post img { max-width: 100%; border-radius: 8px; }
article.post hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px; margin: 18px 0;
}
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); margin: 0; }

/* projects */
ul.projects { list-style: none; }
ul.projects li { padding: 18px 0; border-bottom: 1px solid var(--border); }
ul.projects li:first-child { border-top: 1px solid var(--border); }
ul.projects .name { font-weight: 700; font-size: 1.1rem; color: var(--fg); }
ul.projects .desc { color: var(--muted); font-size: .95rem; margin-top: 4px; }
ul.projects .tag {
  display: inline-block; font-size: .75rem; color: var(--accent-2);
  border: 1px solid var(--border); padding: 1px 8px; border-radius: 999px;
  margin: 6px 4px 0 0;
}

/* footer */
footer.site {
  border-top: 1px solid var(--border); padding: 28px 0;
  color: var(--muted); font-size: .9rem;
}
footer.site .inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* utility */
.muted { color: var(--muted); }
@media (max-width: 560px) {
  .hero h1 { font-size: 1.8rem; }
  nav.site { flex-wrap: wrap; gap: 12px; }
  nav.site .links { margin-left: 0; width: 100%; }
}