:root {
  --bg-canvas: #0d1117;
  --bg-subtle: #161b22;
  --bg-elevated: #21262d;
  --border: #30363d;
  --border-muted: #21262d;
  --fg-default: #c9d1d9;
  --fg-muted: #8b949e;
  --accent: #58a6ff;
  --accent-emphasis: #1f6feb;
  --warm: #f78166;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="light"] {
  --bg-canvas: #ffffff;
  --bg-subtle: #f6f8fa;
  --bg-elevated: #ffffff;
  --border: #d0d7de;
  --border-muted: #d8dee4;
  --fg-default: #1f2328;
  --fg-muted: #656d76;
  --accent: #0969da;
  --accent-emphasis: #0969da;
  --warm: #cf4d35;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--bg-canvas); color: var(--fg-default); font: 16px/1.6 var(--font-ui); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.gh-header { display: flex; align-items: center; gap: 12px; max-width: 1176px; margin: 0 auto; padding: 14px 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg-default); font-weight: 600; font-size: 20px; }
.brand:hover { text-decoration: none; }
.owner { color: var(--fg-muted); font-weight: 400; }
.site-logo { width: 34px; height: 34px; flex: 0 0 auto; }
.logo-circle { fill: var(--fg-default); }
.logo-mark { fill: var(--bg-canvas); }
.gh-visibility { border: 1px solid var(--border); border-radius: 999px; color: var(--fg-muted); font-size: 12px; line-height: 22px; padding: 0 8px; }
.theme-switch-wrap { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.theme-icon { width: 16px; height: 16px; color: var(--fg-default); flex: 0 0 auto; }
.theme-icon.moon-icon { display: none; }
:root[data-theme="dark"] .theme-icon.sun-icon { display: none; }
:root[data-theme="dark"] .theme-icon.moon-icon { display: block; }
.theme-switch { position: relative; width: 40px; height: 22px; padding: 0; cursor: pointer; border: 1px solid var(--border); border-radius: 999px; background: var(--bg-subtle); }
.theme-switch-knob { position: absolute; inset: 2px auto 2px 2px; width: 16px; border-radius: 50%; background: var(--fg-muted); transition: transform .18s ease, background .18s ease; }
:root[data-theme="light"] .theme-switch { background: var(--accent); border-color: var(--accent); }
:root[data-theme="light"] .theme-switch-knob { transform: translateX(17px); background: white; }

.gh-tabs { display: flex; align-items: center; gap: 4px; padding: 0 max(24px, calc((100vw - 1176px) / 2 + 24px)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.gh-tabs a { color: var(--fg-muted); padding: 11px 10px 9px; border-bottom: 2px solid transparent; font-size: 14px; }
.gh-tabs a.active { color: var(--fg-default); font-weight: 600; border-color: var(--warm); }
.gh-tabs .feed-link { margin-left: auto; }

.gh-container { width: min(1128px, calc(100% - 48px)); margin: 0 auto; padding: 48px 0 24px; }
.narrow { width: min(780px, calc(100% - 48px)); }
.hero { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(220px, .8fr); gap: 24px; align-items: stretch; margin-bottom: 64px; }
.featured-post, .hero-note { border: 1px solid var(--border); border-radius: 9px; background: var(--bg-subtle); padding: clamp(24px, 5vw, 44px); }
.featured-post { background: linear-gradient(135deg, var(--bg-subtle), var(--bg-canvas)); }
.hero-note { display: flex; flex-direction: column; justify-content: center; color: var(--fg-muted); }
.hero-note p:first-child { margin-top: 0; font-size: 18px; }
.hero-note p:last-child { margin-bottom: 0; }
.eyebrow { margin: 0 0 9px; color: var(--fg-muted); font: 600 12px/1.3 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.featured-post h1, .page-intro h1, .post-header h1, .prose h1 { margin: 0 0 14px; font-size: clamp(30px, 5vw, 48px); line-height: 1.12; letter-spacing: -.025em; }
.featured-post h1 a { color: var(--fg-default); }
.featured-post > p:not(.eyebrow) { max-width: 64ch; color: var(--fg-muted); font-size: 17px; }
.button { display: inline-flex; align-items: center; gap: 7px; margin-top: 8px; padding: 8px 13px; border: 1px solid var(--border); border-radius: 6px; background: var(--accent-emphasis); color: #fff; font-weight: 600; }
.button:hover { text-decoration: none; filter: brightness(1.08); }

.browse-heading { display: flex; justify-content: space-between; align-items: end; margin-bottom: 16px; }
.browse-heading h2 { margin: 0; font-size: 25px; }
.browse-heading > p { color: var(--fg-muted); margin: 0; }
.search-wrap { display: grid; grid-template-columns: 1fr minmax(190px, 320px); align-items: center; gap: 16px; margin: 16px 0; }
.search-wrap label { color: var(--fg-muted); font-size: 14px; }
.search-wrap input { width: 100%; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-canvas); color: var(--fg-default); padding: 9px 11px; font: inherit; }
.post-list { border-top: 1px solid var(--border); }
.post-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--border-muted); }
.post-card h2 { margin: 0 0 5px; font-size: 19px; line-height: 1.3; }
.post-card h2 a { color: var(--fg-default); }
.post-card p { max-width: 68ch; margin: 0; color: var(--fg-muted); font-size: 14px; }
.post-card-meta { display: flex; justify-content: flex-end; align-items: flex-start; gap: 9px; flex-wrap: wrap; max-width: 320px; color: var(--fg-muted); font-size: 12px; text-align: right; }
.post-card-meta time { white-space: nowrap; }
.tag-list { display: inline-flex; gap: 5px; flex-wrap: wrap; }
.post-tag { display: inline-flex; align-items: center; border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px; color: var(--accent); font-size: 12px; line-height: 1.4; }
.tag-section { margin-top: 48px; }
.tag-folders { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-folder { border: 1px solid var(--border); border-radius: 6px; padding: 7px 10px; background: var(--bg-subtle); color: var(--fg-default); font-size: 14px; }
.tag-folder::before { content: "⌁ "; color: var(--accent); }
.tag-folder:hover { border-color: var(--accent); text-decoration: none; }

.page-intro { margin-bottom: 32px; }
.page-intro > p:last-child { color: var(--fg-muted); }
.gh-readme, .post-article { border: 1px solid var(--border); border-radius: 9px; background: var(--bg-elevated); }
.prose { padding: clamp(24px, 5vw, 52px); }
.prose > :first-child { margin-top: 0; }
.prose h2 { margin: 42px 0 14px; padding-bottom: 7px; border-bottom: 1px solid var(--border-muted); font-size: 23px; }
.prose li { margin: 6px 0; }
.archive-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--border); }
.archive-list li { display: grid; grid-template-columns: 120px 1fr auto; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--border-muted); }
.archive-list time, .archive-list span { color: var(--fg-muted); font-size: 13px; }
.not-found { padding: 64px 0; }

.reading-layout { display: grid; grid-template-columns: minmax(0, 780px) 220px; gap: 40px; align-items: start; }
.post-article { padding: clamp(24px, 6vw, 56px); }
.back-link { display: inline-block; margin-bottom: 32px; font-size: 14px; }
.post-header { margin-bottom: 40px; }
.post-dek { max-width: 62ch; color: var(--fg-muted); font-size: 18px; }
.post-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--fg-muted); font-size: 13px; }
.copy-link { cursor: pointer; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-subtle); color: var(--fg-default); padding: 4px 8px; font: inherit; font-size: 12px; }
.copy-link:hover { border-color: var(--accent); }
.markdown-body { font-size: 17px; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body h2, .markdown-body h3, .markdown-body h4 { margin: 42px 0 15px; line-height: 1.25; }
.markdown-body h2 { padding-bottom: 8px; border-bottom: 1px solid var(--border-muted); font-size: 1.5em; }
.markdown-body h3 { font-size: 1.22em; }
.markdown-body p { margin: 0 0 21px; }
.markdown-body ul, .markdown-body ol { margin: 0 0 21px; padding-left: 1.5em; }
.markdown-body li { margin-bottom: 6px; }
.markdown-body blockquote { margin: 0 0 24px; padding: 2px 0 2px 20px; border-left: 3px solid var(--border); color: var(--fg-muted); }
.markdown-body blockquote p:last-child { margin-bottom: 0; }
.markdown-body code { border-radius: 5px; background: var(--bg-subtle); padding: .14em .36em; font: .85em var(--font-mono); }
.markdown-body pre { margin: 0 0 22px; overflow-x: auto; border: 1px solid var(--border); border-radius: 7px; background: var(--bg-subtle); padding: 16px; }
.markdown-body pre code { padding: 0; background: transparent; }
.markdown-body img { display: block; max-width: 100%; height: auto; margin: 24px auto; border-radius: 7px; }
.markdown-body hr { border: 0; border-top: 1px solid var(--border-muted); margin: 32px 0; }
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border-muted); }
.post-nav a { min-height: 72px; border: 1px solid var(--border); border-radius: 7px; padding: 12px; color: var(--fg-default); font-size: 14px; }
.post-nav a.older { text-align: right; }
.post-nav a span { display: block; margin-bottom: 3px; color: var(--fg-muted); font-size: 12px; }
.post-nav a:hover { border-color: var(--accent); text-decoration: none; }
.toc { position: sticky; top: 22px; padding-top: 8px; color: var(--fg-muted); font-size: 13px; }
.toc ol { margin: 0; padding-left: 17px; }
.toc li { margin: 8px 0; }
.toc a { color: inherit; }

.gh-footer { width: min(1128px, calc(100% - 48px)); margin: 64px auto 24px; padding: 18px 0; border-top: 1px solid var(--border); color: var(--fg-muted); font-size: 13px; }

@media (max-width: 840px) {
  .hero { grid-template-columns: 1fr; margin-bottom: 44px; }
  .reading-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .gh-header { padding: 12px 16px; }
  .brand { font-size: 17px; }
  .site-logo { width: 30px; height: 30px; }
  .gh-visibility { display: none; }
  .gh-tabs { overflow-x: auto; padding: 0 16px; }
  .gh-tabs a { white-space: nowrap; }
  .gh-container, .narrow { width: min(100% - 32px, 780px); padding-top: 30px; }
  .featured-post, .hero-note, .post-article, .prose { padding: 24px; }
  .search-wrap { grid-template-columns: 1fr; gap: 7px; }
  .post-card { grid-template-columns: 1fr; gap: 9px; }
  .post-card-meta { justify-content: flex-start; max-width: none; text-align: left; }
  .archive-list li { grid-template-columns: 1fr; gap: 4px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav a.older { text-align: left; }
  .markdown-body { font-size: 16px; }
  .post-dek { font-size: 16px; }
  .gh-footer { width: min(100% - 32px, 1128px); margin-top: 42px; }
}

[hidden] { display: none !important; }