:root {
  --bg: #0b0d12;
  --bg-elev: #121625;
  --text: #e7eaf1;
  --muted: #aab3c5;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #8ab4ff;
  --danger: #ff6b6b;
  --shadow: rgba(0, 0, 0, 0.35);

  --content-max: 72ch;
  --sidebar: 280px;
  --radius: 12px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

html[data-theme="light"] {
  --bg: #fafbff;
  --bg-elev: #ffffff;
  --text: #0b0d12;
  --muted: #4a5568;
  --border: rgba(0, 0, 0, 0.12);
  --accent: #1a56db;
  --shadow: rgba(16, 24, 40, 0.12);
}

@media (prefers-color-scheme: light) {
  html[data-theme="auto"] {
    --bg: #fafbff;
    --bg-elev: #ffffff;
    --text: #0b0d12;
    --muted: #4a5568;
    --border: rgba(0, 0, 0, 0.12);
    --accent: #1a56db;
    --shadow: rgba(16, 24, 40, 0.12);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: var(--mono);
}

pre {
  overflow-x: auto;
  background: color-mix(in srgb, var(--bg-elev), transparent 15%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: 0 1px 0 var(--shadow);
}

code {
  font-size: 0.95em;
  background: color-mix(in srgb, var(--bg-elev), transparent 20%);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.15em 0.35em;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--bg), transparent 10%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--text);
  text-decoration: none;
}

.brand-title {
  font-weight: 650;
  letter-spacing: 0.2px;
}

.brand-subtitle {
  font-size: 0.9rem;
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-button {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  box-shadow: 0 1px 0 var(--shadow);
}

.icon-button:hover {
  border-color: color-mix(in srgb, var(--border), var(--accent) 40%);
}

.search {
  width: min(420px, 44vw);
  padding: 9px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  outline: none;
}

.search:focus {
  border-color: color-mix(in srgb, var(--border), var(--accent) 65%);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent), transparent 80%);
}

.index-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 22px 16px 64px;
}

.index-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.counts {
  font-size: 0.95rem;
  color: var(--muted);
}

.hint {
  font-size: 0.9rem;
  color: var(--muted);
}

.hint code {
  font-size: 0.9em;
}

.post-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 12px;
}

.post-item {
  display: block;
  padding: 14px 14px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: 0 1px 0 var(--shadow);
  text-decoration: none;
  color: var(--text);
}

.post-item:hover {
  border-color: color-mix(in srgb, var(--border), var(--accent) 40%);
  text-decoration: none;
}

.post-item-title {
  font-weight: 620;
  margin-bottom: 8px;
}

.post-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elev), transparent 10%);
  font-size: 0.85rem;
  color: var(--muted);
}

.badge.danger {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger), transparent 65%);
}

.post-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 16px 64px;
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  gap: 18px;
}

.sidebar {
  position: sticky;
  top: 76px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toc {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 10px 12px;
  box-shadow: 0 1px 0 var(--shadow);
}

.toc summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
}

.toc summary::-webkit-details-marker {
  display: none;
}

#TOC ul {
  padding-left: 18px;
  margin: 10px 0 0;
}

#TOC li {
  margin: 6px 0;
}

#TOC a {
  color: var(--muted);
}

#TOC a:hover {
  color: var(--accent);
}

.post-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  box-shadow: 0 1px 0 var(--shadow);
  text-decoration: none;
}

.nav-link:hover {
  border-color: color-mix(in srgb, var(--border), var(--accent) 40%);
  text-decoration: none;
}

.content {
  min-width: 0;
}

.post-header {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 18px 18px 14px;
  box-shadow: 0 1px 0 var(--shadow);
  margin-bottom: 14px;
}

.post-title {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  line-height: 1.2;
  margin: 0 0 10px;
}

.post-disclaimer {
  margin: -2px 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-body {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  padding: 18px;
  box-shadow: 0 1px 0 var(--shadow);
}

.post-body > :first-child {
  margin-top: 0;
}

.post-body img,
.post-body svg,
.post-body video {
  max-width: 100%;
  height: auto;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  overflow: auto;
  display: block;
}

.post-body th,
.post-body td {
  border-bottom: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.post-body blockquote {
  margin: 14px 0;
  padding: 12px 14px;
  border-left: 4px solid color-mix(in srgb, var(--accent), transparent 40%);
  background: color-mix(in srgb, var(--bg-elev), transparent 15%);
  border-radius: 10px;
}

.post-footer {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}

.post-footer-nav,
.post-footer-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

@media (max-width: 920px) {
  .post-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    top: auto;
  }
}