:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-elev: #1c232c;
  --fg: #e6edf3;
  --fg-muted: #9aa6b2;
  --accent: #ff8a3d;
  --accent-soft: #ffb98a;
  --border: #2a323d;
  --code-bg: #0a0f15;
  --link: #7aa7ff;
  --warn: #f0b400;
  --good: #5fdb9a;
  --bad: #ff6b6b;
  --font-sans:
    "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:
    "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;
  --radius: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  --bg: #fafafa;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --fg: #181e25;
  --fg-muted: #5b6573;
  --accent: #d96a1f;
  --accent-soft: #b94b00;
  --border: #e4e7ec;
  --code-bg: #f3f5f7;
  --link: #1f5dde;
  --shadow: 0 4px 16px rgba(20, 20, 30, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

/* ----------------------------- topbar ----------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-soft), var(--bg));
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand .logo {
  font-size: 36px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  text-shadow: 0 0 24px rgba(255, 138, 61, 0.35);
}

.brand h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 2px 0 0;
  color: var(--fg-muted);
  font-size: 13px;
}

.searchbox input {
  background: var(--bg-elev);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  width: 280px;
  font: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.searchbox input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.18);
}

/* ----------------------------- layout ----------------------------- */

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 70px);
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 18px 16px;
  position: sticky;
  top: 70px;
  height: calc(100vh - 70px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar section {
  margin-bottom: 22px;
}

.sidebar h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
  margin: 0 0 8px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  margin: 2px 0;
}

.sidebar a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--fg);
  font-size: 14px;
  transition: background 0.1s, color 0.1s;
}

.sidebar a:hover {
  background: var(--bg-elev);
  text-decoration: none;
}

.sidebar a.active {
  background: var(--accent);
  color: #1c1208;
  font-weight: 600;
}

.sidebar a.hidden-by-filter {
  display: none;
}

.sidebar-foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 12px;
}

.muted {
  color: var(--fg-muted);
}

.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.badge-pending {
  background: rgba(240, 180, 0, 0.18);
  color: var(--warn);
}
.badge-ready {
  background: rgba(95, 219, 154, 0.18);
  color: var(--good);
}

/* ----------------------------- content ----------------------------- */

.content {
  padding: 26px 38px 60px;
  max-width: 980px;
}

.content-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.crumb {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.content-head h2 {
  margin: 4px 0 0;
  font-size: 26px;
  letter-spacing: -0.01em;
}

.toolbar {
  display: flex;
  gap: 6px;
}

.toolbar button {
  background: var(--bg-elev);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}
.toolbar button:hover {
  border-color: var(--accent);
}

/* ----------------------------- prose ----------------------------- */

.prose {
  max-width: 78ch;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  letter-spacing: -0.01em;
  margin-top: 1.8em;
  margin-bottom: 0.5em;
  line-height: 1.25;
}

.prose h1 {
  font-size: 1.9em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.prose h2 {
  font-size: 1.45em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}
.prose h3 {
  font-size: 1.18em;
}
.prose h4 {
  font-size: 1em;
  color: var(--accent-soft);
}

.prose p,
.prose ul,
.prose ol {
  margin: 0.6em 0;
}

.prose ul,
.prose ol {
  padding-left: 1.6em;
}

.prose blockquote {
  margin: 1em 0;
  padding: 6px 14px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  color: var(--fg-muted);
  border-radius: 0 6px 6px 0;
}

.prose code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.prose pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 0.86em;
}
.prose pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.92em;
}
.prose th,
.prose td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.prose th {
  background: var(--bg-soft);
  font-weight: 600;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

/* ----------------------------- hero ----------------------------- */

.hero h1 {
  margin-top: 0;
}

.card-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.card {
  display: block;
  padding: 16px 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  transition:
    transform 0.12s,
    border-color 0.12s,
    box-shadow 0.12s;
}
.card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--accent);
}
.card p {
  margin: 0;
  font-size: 13px;
  color: var(--fg-muted);
}

/* status tags inside markdown */
.tag {
  display: inline-block;
  padding: 0 6px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 600;
  margin-right: 4px;
  vertical-align: middle;
  font-family: var(--font-mono);
}
.tag-fact {
  background: rgba(95, 219, 154, 0.18);
  color: var(--good);
}
.tag-inference {
  background: rgba(122, 167, 255, 0.18);
  color: var(--link);
}
.tag-open {
  background: rgba(240, 180, 0, 0.18);
  color: var(--warn);
}
.tag-risk {
  background: rgba(255, 107, 107, 0.18);
  color: var(--bad);
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    height: auto;
    top: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .searchbox input {
    width: 180px;
  }
}