/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: #1a1a2e;
  background: #f8f9fc;
}
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #f1f5f9;
  padding: 56px 0 48px;
  text-align: center;
}
.hero-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
}
.hero-logo {
  width: 140px;
  height: 140px;
  object-fit: contain;
  border-radius: 16px;
  flex-shrink: 0;
}
.hero-text { text-align: left; }
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.hero .subtitle {
  font-size: 1.15rem;
  color: #94a3b8;
  max-width: 640px;
  margin: 0;
}
.hero-description {
  max-width: 860px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: #cbd5e1;
  text-align: left;
}
.hero-description strong {
  color: #f1f5f9;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 2.4rem;
  font-weight: 700;
  color: #60a5fa;
}
.stat-label {
  font-size: 0.85rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== Sections ===== */
.section { padding: 48px 0; }
.section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: #0f172a;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 8px;
}

/* ===== Cross Table ===== */
.table-wrap { overflow-x: auto; margin-bottom: 32px; }
.cross-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.cross-table th, .cross-table td {
  padding: 8px 12px;
  text-align: center;
  border: 1px solid #e2e8f0;
}
.cross-table th {
  background: #f1f5f9;
  font-weight: 600;
  color: #334155;
}
.cross-table td.num { font-weight: 600; font-variant-numeric: tabular-nums; }
.cross-table td.num-zero { color: #cbd5e1; }
.cross-table tr:last-child td { font-weight: 700; background: #f8fafc; }
.cross-table td:first-child,
.cross-table th:first-child { text-align: left; }

/* ===== Bar Charts ===== */
.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.chart-box {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 20px;
}
.chart-box h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: #334155;
}
.bar-row {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.85rem;
}
.bar-label {
  width: 150px;
  flex-shrink: 0;
  text-align: right;
  padding-right: 10px;
  color: #475569;
  font-weight: 500;
  white-space: nowrap;
}
.bar-track {
  flex: 1;
  background: #f1f5f9;
  border-radius: 4px;
  height: 22px;
  position: relative;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
  min-width: 2px;
}
.bar-value {
  width: 36px;
  text-align: right;
  padding-left: 8px;
  font-weight: 600;
  color: #334155;
  font-variant-numeric: tabular-nums;
}

/* ===== Pattern Colors ===== */
.pattern-PA1, .badge-PA1 { --pattern-color: #dc2626; }
.pattern-PA2, .badge-PA2 { --pattern-color: #ea580c; }
.pattern-PA3, .badge-PA3 { --pattern-color: #d97706; }
.pattern-PB1, .badge-PB1 { --pattern-color: #2563eb; }
.pattern-PB2, .badge-PB2 { --pattern-color: #1d4ed8; }
.pattern-PB3, .badge-PB3 { --pattern-color: #7c3aed; }
.pattern-PC1, .badge-PC1 { --pattern-color: #059669; }
.pattern-others, .badge-others { --pattern-color: #64748b; }

.bar-fill { background: var(--pattern-color, #64748b); }
.bar-fill.vendor { background: #3b82f6; }
.bar-fill.protocol { background: #6366f1; }

/* ===== Filter Bar ===== */
.filter-section {
  background: #fff;
  border-top: 1px solid #e2e8f0;
  border-bottom: 1px solid #e2e8f0;
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.filter-bar {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.filter-group { display: flex; flex-direction: column; gap: 4px; }
.filter-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
}
.filter-group select, .filter-group input {
  padding: 6px 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 0.9rem;
  background: #fff;
  color: #1a1a2e;
}
.filter-search { flex: 1; min-width: 200px; }
.filter-search input { width: 100%; }
.btn-reset {
  padding: 6px 16px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: #f8fafc;
  color: #475569;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn-reset:hover { background: #e2e8f0; }
.filter-info {
  margin-top: 10px;
  font-size: 0.85rem;
  color: #64748b;
}

/* ===== Main Layout (TOC + List) ===== */
.main-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding-right: 8px;
}
.toc h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
  margin-bottom: 12px;
}
.toc ul { list-style: none; }
.toc li { margin-bottom: 2px; }
.toc a {
  display: block;
  padding: 3px 8px;
  font-size: 0.82rem;
  color: #475569;
  border-radius: 4px;
  border-left: 2px solid transparent;
}
.toc a:hover { background: #f1f5f9; text-decoration: none; }
.toc a.toc-vendor {
  font-weight: 700;
  color: #1e293b;
  font-size: 0.88rem;
  margin-top: 8px;
}
.toc a.toc-protocol {
  padding-left: 16px;
  font-weight: 500;
  color: #334155;
}
.toc a.toc-count {
  float: right;
  color: #94a3b8;
  font-size: 0.75rem;
}

/* ===== Vendor Group ===== */
.vendor-group { margin-bottom: 40px; }
.vendor-heading {
  font-size: 1.4rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 4px;
  padding-top: 16px;
}
.protocol-heading {
  font-size: 1.1rem;
  font-weight: 600;
  color: #334155;
  margin: 20px 0 12px;
  padding-bottom: 4px;
  border-bottom: 1px solid #e2e8f0;
}

/* ===== Vuln Card ===== */
.vuln-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 16px;
  border-left: 4px solid var(--pattern-color, #64748b);
  transition: box-shadow 0.2s;
}
.vuln-card:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.06); }
.vuln-card:target { box-shadow: 0 0 0 2px #3b82f6; }

.vuln-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.vuln-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #0f172a;
  flex: 1;
  min-width: 200px;
}
.vuln-title a { color: inherit; }
.vuln-title a:hover { color: #2563eb; }

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-pattern {
  background: var(--pattern-color);
  color: #fff;
}
.badge-crash {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}
.badge-cwe {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

.vuln-meta {
  font-size: 0.85rem;
  color: #64748b;
  margin-bottom: 10px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.vuln-meta a { color: #2563eb; }

.vuln-description {
  font-size: 0.92rem;
  color: #334155;
  margin-bottom: 12px;
  line-height: 1.65;
}

/* Root cause */
.vuln-root-cause { margin-bottom: 14px; }
.vuln-root-cause-heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.vuln-root-cause .root-cause-body {
  font-size: 0.88rem;
  color: #475569;
  line-height: 1.6;
  padding-left: 12px;
  border-left: 2px solid #e2e8f0;
}

/* Code blocks */
.vuln-code { margin-bottom: 8px; }
.vuln-code-heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.vuln-code pre {
  margin-top: 6px;
  border-radius: 6px;
  font-size: 0.82rem;
  line-height: 1.5;
  overflow-x: auto;
}
.vuln-code pre code {
  display: block;
  padding: 16px;
}

/* Highlight vulnerability annotation lines (// ^) */
.vuln-line {
  display: inline-block;
  width: 100%;
  background: rgba(220, 38, 38, 0.15);
  margin: 0 -16px;
  padding: 0 16px;
}

/* ===== Footer ===== */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 32px 0;
  text-align: center;
  font-size: 0.9rem;
}
.footer a { color: #60a5fa; }
.footer-note {
  margin-top: 8px;
  font-size: 0.8rem;
  color: #64748b;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  .toc {
    position: static;
    max-height: none;
    display: none;
  }
  .hero-top { flex-direction: column; gap: 16px; }
  .hero-logo { width: 100px; height: 100px; }
  .hero-text { text-align: center; }
  .hero h1 { font-size: 2rem; }
  .hero-description { text-align: center; font-size: 0.95rem; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 1.8rem; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-group { width: 100%; }
  .vuln-header { flex-direction: column; gap: 6px; }
}

/* ===== Scrollbar (TOC) ===== */
.toc::-webkit-scrollbar { width: 4px; }
.toc::-webkit-scrollbar-track { background: transparent; }
.toc::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }

/* ===== No results ===== */
.no-results {
  text-align: center;
  padding: 48px 0;
  color: #94a3b8;
  font-size: 1.1rem;
}