/* Static subject-page stylesheet. Deliberately standalone (not the app bundle,
   which is hashed per build and not a stable link target from a static file).
   Palette matches src/index.css / src/lib/syllabusRegistry.ts SUBJECT_COLOURS. */

:root {
  --blue: #0078D4;
  --blue-dark: #005A9E;
  --ink: #0F172A;
  --text-muted: #475569;
  --text-dim: #64748B;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --bg: #F8FAFC;
  --green: #107C10;
  --amber: #986F0B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: #FFFFFF;
  line-height: 1.6;
}

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

.site-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.site-header img { width: 28px; height: 28px; border-radius: 4px; object-fit: cover; }
.site-header span { font-weight: 800; font-size: 15px; }

.breadcrumb-nav {
  padding: 12px 24px;
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.breadcrumb-nav a { color: var(--text-dim); }
.breadcrumb-nav .sep { margin: 0 6px; color: var(--border-strong); }
.breadcrumb-nav .current { color: var(--ink); font-weight: 600; }

.wrap { max-width: 860px; margin: 0 auto; padding: 36px 24px 60px; }

h1 { font-size: 30px; font-weight: 900; letter-spacing: -0.5px; margin: 0 0 10px; }
.subject-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-dim); font-family: 'JetBrains Mono', monospace; margin-bottom: 18px; }
.subject-meta span { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; padding: 3px 9px; }

.intro { font-size: 15px; color: var(--text-muted); max-width: 700px; margin: 0 0 32px; }

h2 { font-size: 20px; font-weight: 800; margin: 40px 0 6px; }
.topic-card { border: 1px solid var(--border); border-radius: 8px; padding: 20px 22px; margin-bottom: 20px; background: #FFFFFF; }
.topic-card h3 { font-size: 17px; font-weight: 800; margin: 0 0 8px; }
.topic-card p { font-size: 13.5px; color: var(--text-muted); margin: 0 0 12px; }

.citation-list { list-style: none; padding: 0; margin: 0 0 12px; }
.citation-list li { font-size: 12.5px; padding: 8px 10px; background: var(--bg); border-radius: 6px; margin-bottom: 6px; }
.citation-badge { display: inline-block; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px; padding: 1px 6px; border-radius: 3px; margin-left: 6px; }
.citation-badge.verified { background: #DCFCE7; color: #166534; }
.citation-badge.needs-review { background: #FEF3C7; color: #92400E; }
.citation-evidence { display: block; margin-top: 4px; font-style: italic; color: var(--text-dim); }

.traps-heading { font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--amber); margin: 12px 0 6px; }
.traps-list { margin: 0; padding-left: 18px; font-size: 13px; color: var(--text-muted); }
.traps-list li { margin-bottom: 5px; }

.also-covered { font-size: 13.5px; color: var(--text-muted); }
.also-covered li { margin-bottom: 10px; }
.also-covered .needs-review-tag { font-size: 10px; color: var(--amber); font-weight: 700; text-transform: uppercase; }

/* Guide pages: numbered procedure list (HowTo steps). */
.guide-steps { margin: 8px 0 0; padding-left: 22px; font-size: 14px; color: var(--text-muted); }
.guide-steps li { margin-bottom: 10px; }
.guide-steps li strong { color: var(--ink); }

.cta-panel {
  margin-top: 40px;
  padding: 26px 28px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  text-align: center;
}
.cta-panel a.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 22px;
  background: var(--blue);
  color: #FFFFFF;
  border-radius: 4px;
  font-weight: 700;
  font-size: 13.5px;
}
.cta-panel a.btn:hover { background: var(--blue-dark); text-decoration: none; }

.site-footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--text-dim);
  text-align: center;
}

/* Citation & Social Sharing Box */
.cite-box {
  margin-top: 36px;
  padding: 20px 22px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.cite-box-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}
.cite-box-sub {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.cite-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.cite-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s ease;
}
.cite-btn:hover {
  background: #F1F5F9;
  border-color: var(--blue);
  color: var(--blue);
}
.cite-snippet {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: #334155;
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}
.site-footer a { color: var(--text-dim); margin: 0 8px; }