:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #656d76;
  --accent: #2f6feb;
  --border: #e3e6ea;
  --code-bg: #f6f8fa;
  --max: 760px;
}

/* 宽屏利用率：阅读宽度随视口渐进放宽，正文不过长、图表/表格吃满可用空间 */
@media (min-width: 1024px) { :root { --max: 920px; } }
@media (min-width: 1440px) { :root { --max: 1080px; } }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --accent: #4f8cff;
    --border: #21262d;
    --code-bg: #161b22;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(6px);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand { font-weight: 700; font-size: 18px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.site-nav a { margin-left: 18px; color: var(--muted); font-size: 15px; }
.site-nav a:hover { color: var(--accent); text-decoration: none; }

main.container { padding-top: 32px; padding-bottom: 48px; min-height: 60vh; }

.intro { color: var(--muted); margin-bottom: 28px; }

.section-title {
  font-size: 20px;
  margin: 28px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.post-list { list-style: none; padding: 0; margin: 0; }
.post-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.post-title { font-size: 17px; font-weight: 600; color: var(--fg); }
.post-title:hover { color: var(--accent); text-decoration: none; }
.post-date { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }
.post-summary { color: var(--muted); font-size: 14px; margin: 6px 0 0; }

/* 内联 SVG 图表（用主题 CSS 变量，自动跟随明暗模式） */
.post-content svg { margin: 22px 0; max-width: 100%; height: auto; }

/* 列表页空态 */
.page-title { font-size: 26px; margin: 0 0 18px; }
.empty-note { color: var(--muted); font-size: 15px; margin: 8px 0 0; }

.post-header { margin-bottom: 24px; }
.post-header h1 { font-size: 28px; line-height: 1.3; margin: 0 0 10px; }
.post-meta { color: var(--muted); font-size: 14px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.tags { display: inline-flex; gap: 6px; flex-wrap: wrap; }
.tag { background: var(--code-bg); border: 1px solid var(--border); border-radius: 999px; padding: 1px 10px; font-size: 12px; color: var(--muted); }

.post-content { font-size: 16px; }
.post-content h2 { font-size: 22px; margin: 32px 0 12px; }
.post-content h3 { font-size: 18px; margin: 24px 0 10px; }
.post-content p { margin: 14px 0; }
.post-content img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); }
.post-content .fig { margin: 18px 0; }
.post-content blockquote {
  margin: 16px 0;
  padding: 8px 16px;
  border-left: 4px solid var(--accent);
  background: var(--code-bg);
  color: var(--muted);
  border-radius: 0 8px 8px 0;
}
.post-content ul, .post-content ol { padding-left: 24px; }
.post-content li { margin: 6px 0; }

.post-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
}
.post-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.post-content pre code { background: none; padding: 0; }
.post-content .highlight pre { background: var(--code-bg); }

/* ── Chroma 代码高亮（Hugo noClasses=false，亮/暗双主题） ── */
.c, .c1, .ch, .cm, .cs, .cd, .ge, .gl { color: #6a737d; font-style: italic; }
.k, .kc, .kd, .kn, .kp, .kr, .kt, .o, .ow, .err { color: #d73a49; }
.s, .s1, .s2, .sa, .sb, .sc, .sd, .se, .sh, .si, .sx, .sr, .ss, .dl { color: #032f62; }
.m, .mb, .mf, .mh, .mi, .mo, .il { color: #005cc5; }
.nv, .na, .nb, .no, .nx, .vg, .vi, .vc, .bp { color: #e36209; }
.nf, .fm { color: #6f42c1; }
.gp { color: #6a737d; font-weight: 600; }
.l, .ld { color: #1f2328; }

@media (prefers-color-scheme: dark) {
  .c, .c1, .ch, .cm, .cs, .cd, .ge, .gl, .gp { color: #8b949e; }
  .k, .kc, .kd, .kn, .kp, .kr, .kt, .o, .ow, .err { color: #ff7b72; }
  .s, .s1, .s2, .sa, .sb, .sc, .sd, .se, .sh, .si, .sx, .sr, .ss, .dl { color: #a5d6ff; }
  .m, .mb, .mf, .mh, .mi, .mo, .il { color: #79c0ff; }
  .nv, .na, .nb, .no, .nx, .vg, .vi, .vc, .bp { color: #ffa657; }
  .nf, .fm { color: #d2a8ff; }
  .l, .ld { color: #e6edf3; }
}

.post-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 14px;
}
.post-content th, .post-content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.post-content th { background: var(--code-bg); }

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  padding: 20px 0;
}