:root {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-card: #1c212b;
  --bg-card-hover: #222836;
  --border: #2a3140;
  --text: #e8eaed;
  --text-dim: #9aa3b2;
  --text-mute: #6b7380;
  --accent: #7dd3fc;
  --link: #7dd3fc;
  --link-hover: #bae6fd;
  --tag-fact: #22c55e;
  --tag-opinion: #f59e0b;
  --radius: 10px;
  --font: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --max: 920px;
  --pad: 1rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa;
    --bg-elev: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f0f2f5;
    --border: #e2e5eb;
    --text: #1a1d24;
    --text-dim: #4b5563;
    --text-mute: #8b93a1;
    --accent: #0369a1;
    --link: #0369a1;
    --link-hover: #0c4a6e;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad) 3rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.75rem var(--pad);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover {
  text-decoration: none;
  color: var(--accent);
}
.brand span {
  color: var(--text-mute);
  font-weight: 450;
  font-size: 0.85rem;
  margin-left: 0.4rem;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  font-size: 0.875rem;
}
.nav a {
  color: var(--text-dim);
}
.nav a:hover,
.nav a.active {
  color: var(--text);
}

.search-box {
  position: relative;
  flex: 1 1 180px;
  max-width: 280px;
  min-width: 140px;
}
.search-box input {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.45rem 0.7rem;
  font: inherit;
  font-size: 0.875rem;
}
.search-box input::placeholder {
  color: var(--text-mute);
}
.search-box input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 50%, transparent);
  border-color: var(--accent);
}
#search-results {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 320px;
  overflow: auto;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  z-index: 50;
}
#search-results.open {
  display: block;
}
#search-results a {
  display: block;
  padding: 0.55rem 0.75rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  text-decoration: none;
}
#search-results a:last-child {
  border-bottom: none;
}
#search-results a:hover {
  background: var(--bg-card-hover);
}
#search-results .meta {
  color: var(--text-mute);
  font-size: 0.75rem;
}
#search-results .empty {
  padding: 0.75rem;
  color: var(--text-mute);
  font-size: 0.85rem;
}

/* Page chrome */
.page-head {
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}
.page-head h1 {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.page-head .sub {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-mute);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  white-space: nowrap;
}
.badge.source {
  border-color: color-mix(in srgb, var(--src-color, var(--accent)) 55%, var(--border));
  color: var(--src-color, var(--accent));
  background: color-mix(in srgb, var(--src-color, var(--accent)) 12%, transparent);
}
.badge.fact {
  color: var(--tag-fact);
  border-color: color-mix(in srgb, var(--tag-fact) 40%, var(--border));
}
.badge.opinion {
  color: var(--tag-opinion);
  border-color: color-mix(in srgb, var(--tag-opinion) 40%, var(--border));
}

/* Cards */
.card-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.95rem 1.05rem;
  transition: background 0.12s, border-color 0.12s;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.card-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.65rem;
  margin-bottom: 0.45rem;
}
.card h2 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  flex: 1 1 auto;
}
.card h2 a {
  color: var(--text);
  text-decoration: none;
}
.card h2 a:hover {
  color: var(--accent);
}
.card .date {
  font-size: 0.78rem;
  color: var(--text-mute);
  font-variant-numeric: tabular-nums;
}
.card .summary {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.card .summary ul {
  margin: 0.25rem 0 0;
  padding-left: 1.15rem;
}
.card .summary li {
  margin: 0.15rem 0;
}
.card .summary p {
  margin: 0.2rem 0 0;
}
.card-foot {
  margin-top: 0.65rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}
.card-foot .more {
  font-size: 0.82rem;
  font-weight: 550;
}

.section-label {
  margin: 1.5rem 0 0.65rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-mute);
}

/* Source chips on home */
.source-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1.25rem;
}
.source-bar a {
  font-size: 0.8rem;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  text-decoration: none;
  background: var(--bg-elev);
}
.source-bar a:hover {
  color: var(--text);
  border-color: var(--text-mute);
}

/* Article */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-mute);
}
.prose {
  font-size: 0.95rem;
  line-height: 1.65;
}
.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  letter-spacing: -0.015em;
  line-height: 1.3;
  margin: 1.4em 0 0.5em;
}
.prose h1 {
  font-size: 1.35rem;
}
.prose h2 {
  font-size: 1.15rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3rem;
}
.prose h3 {
  font-size: 1.02rem;
}
.prose p {
  margin: 0.55em 0;
}
.prose ul,
.prose ol {
  margin: 0.4em 0;
  padding-left: 1.25rem;
}
.prose li {
  margin: 0.25em 0;
}
.prose li::marker {
  color: var(--text-mute);
}
.prose strong {
  font-weight: 650;
}
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.3em;
}
.prose pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
}
.prose pre code {
  border: none;
  background: none;
  padding: 0;
}
.prose blockquote {
  margin: 0.8em 0;
  padding: 0.35em 0 0.35em 0.9em;
  border-left: 3px solid var(--accent);
  color: var(--text-dim);
}
.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 0.8em 0;
}
.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.55rem;
  text-align: left;
}
.prose th {
  background: var(--bg-elev);
}

/* Highlight opinion/fact markers in body */
.prose .tag-opinion,
.prose .tag-fact {
  font-size: 0.72em;
  font-weight: 650;
  vertical-align: 0.05em;
  padding: 0.05em 0.35em;
  border-radius: 4px;
  margin: 0 0.15em;
}
.prose .tag-opinion {
  color: var(--tag-opinion);
  background: color-mix(in srgb, var(--tag-opinion) 14%, transparent);
}
.prose .tag-fact {
  color: var(--tag-fact);
  background: color-mix(in srgb, var(--tag-fact) 14%, transparent);
}

.back {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Archive list */
.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.archive-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  align-items: baseline;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.archive-list .date {
  font-variant-numeric: tabular-nums;
  color: var(--text-mute);
  font-size: 0.82rem;
  min-width: 5.5rem;
}
.archive-list a {
  color: var(--text);
  font-weight: 550;
}
.archive-day {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 650;
}

.site-footer {
  max-width: var(--max);
  margin: 2rem auto 0;
  padding: 1.25rem var(--pad) 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-mute);
}

.empty-state {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-mute);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

@media (max-width: 600px) {
  .page-head h1 {
    font-size: 1.25rem;
  }
  .card {
    padding: 0.85rem;
  }
  .prose {
    font-size: 0.92rem;
  }
}