/* Modern CSS for PatchThisApp SPA */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ═══════════════════════════════════════════════════════
   CSS Custom Properties — Light Mode (default)
   RogoLabs Primary Blue Palette
   ═══════════════════════════════════════════════════════ */
:root {
  /* RogoLabs Primary Blue Palette (from cve.icu and cveforecast.org) */
  --primary: #2196f3;
  --primary-dark: #1e88e5;
  --primary-darker: #1976d2;
  --primary-darkest: #1e40af;
  --primary-light: #64b5f6;
  --primary-lighter: #90caf9;
  --primary-lightest: #e3f2fd;

  /* Secondary & Accent Colors */
  --secondary: #3b82f6;
  --accent: #60a5fa;
  --accent-hover: #2563eb;

  /* Background Colors */
  --neutral: #fafbfc;
  --background: #f8f9fa;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --surface-tertiary: #f1f5f9;

  /* Dark Backgrounds (for headers/footers) */
  --dark: #1f2937;
  --dark-secondary: #374151;
  --dark-tertiary: #111827;

  /* Text Colors */
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #6c757d;
  --text-gray: #475569;
  --text-gray-dark: #334155;
  --text-on-dark: #e5e7eb;

  /* Borders */
  --border: #dee2e6;
  --border-light: #e2e8f0;
  --border-lighter: #f3f4f6;

  /* Status Colors */
  --success: #81c784;
  --success-alt: #10b981;
  --success-bright: #34d399;
  --warning: #ffb74d;
  --warning-alt: #f59e0b;
  --error: #f06292;
  --info: #60a5fa;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #e3f2fd, #bbdefb);
  --gradient-secondary: linear-gradient(135deg, #bbdefb, #90caf9);
  --gradient-tertiary: linear-gradient(135deg, #90caf9, #64b5f6);
  --gradient-subtle: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --gradient-dark: linear-gradient(135deg, #1f2937 0%, #374151 50%, #111827 100%);

  /* Chart Colors (Blue to Gray Gradient) */
  --chart-1: #e3f2fd;
  --chart-2: #d6e7f5;
  --chart-3: #c8dff0;
  --chart-4: #b9d7eb;
  --chart-5: #aacfe6;
  --chart-6: #9bc7e1;
  --chart-7: #8cbfdc;
  --chart-8: #7db7d7;
  --chart-9: #6eafd2;
  --chart-10: #5fa7cd;
  --chart-11: #509fc8;
  --chart-12: #4197c3;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Border Radius */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;

  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-size-base: 1rem;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.25rem;
  --font-size-h4: 1.125rem;
  --font-size-caption: 0.875rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
}

/* ═══════════════════════════════════════════════════════
   Dark Mode Overrides
   ═══════════════════════════════════════════════════════ */
html.dark {
  --background: #0f172a;
  --surface: #1e293b;
  --surface-alt: #334155;
  --surface-tertiary: #475569;
  --neutral: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-gray: #94a3b8;
  --text-gray-dark: #cbd5e1;
  --text-on-dark: #e5e7eb;
  --border: #334155;
  --border-light: #475569;
  --border-lighter: #374151;
  --dark: #0f172a;
  --dark-secondary: #1e293b;
  --dark-tertiary: #0f172a;
  --gradient-primary: linear-gradient(135deg, #1e293b, #334155);
  --gradient-secondary: linear-gradient(135deg, #334155, #475569);
  --gradient-subtle: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.2);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.2);
  /* Primary blue stays the same */
  --primary: #2196f3;
  --primary-dark: #42a5f5;
  --primary-lightest: #1e3a5f;
}

/* ═══════════════════════════════════════════════════════
   Reset & Base
   ═══════════════════════════════════════════════════════ */
* {
  box-sizing: border-box;
}

html, body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  background: var(--background);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  line-height: var(--line-height-heading);
  letter-spacing: -0.025em;
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

h4 {
  font-size: var(--font-size-h4);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

p, ul, ol {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

ul, ol {
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ═══════════════════════════════════════════════════════
   Sticky Nav
   ═══════════════════════════════════════════════════════ */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  height: 56px;
}

.nav-link {
  padding: 0.5rem 1rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--border-radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-lightest);
  text-decoration: none;
}

.nav-spacer {
  flex: 1;
}

/* ═══════════════════════════════════════════════════════
   Dark Mode Toggle Button
   ═══════════════════════════════════════════════════════ */
.dark-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--border-radius-sm);
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.2s;
  font-family: var(--font-family-base);
}

.dark-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ═══════════════════════════════════════════════════════
   Main Content Container
   ═══════════════════════════════════════════════════════ */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ═══════════════════════════════════════════════════════
   Hero Section
   ═══════════════════════════════════════════════════════ */
.hero-section {
  text-align: center;
  padding: 4rem 2rem 3rem;
  margin: 2rem auto 0;
}

.hero-section.card {
  background: var(--surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  width: 100%;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 1rem 0;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--primary);
  font-weight: 600;
  margin: 0 0 1.5rem 0;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 2.5rem 0;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* ═══════════════════════════════════════════════════════
   Buttons
   ═══════════════════════════════════════════════════════ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1.125rem;
  box-shadow: var(--shadow-lg);
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-family: var(--font-family-base);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  color: white;
  text-decoration: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: var(--surface);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1.125rem;
  border: 2px solid var(--border);
  transition: all 0.2s;
  cursor: pointer;
  font-family: var(--font-family-base);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  text-decoration: none;
}

/* ═══════════════════════════════════════════════════════
   Trust Indicators (Hero)
   ═══════════════════════════════════════════════════════ */
.trust-indicators {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  padding: 2rem 0 0 0;
  border-top: 1px solid var(--border-light);
}

.trust-item {
  text-align: center;
}

.trust-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.trust-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════
   Section Containers (SPA sections)
   ═══════════════════════════════════════════════════════ */
.spa-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin: 0 0 0.5rem 0;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin: 0 0 2.5rem 0;
}

/* ═══════════════════════════════════════════════════════
   Loading & Error States
   ═══════════════════════════════════════════════════════ */
.app-loading {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.app-error {
  background: #fff5f5;
  border: 1px solid var(--error);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin: 2rem auto;
  max-width: 600px;
  color: #c53030;
  text-align: center;
}

html.dark .app-error {
  background: #450a0a;
  color: #fca5a5;
  border-color: #7f1d1d;
}

.app-error button {
  margin-top: 1rem;
  padding: 0.5rem 1.5rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-family-base);
}

/* Data-loaded visibility */
.data-section {
  display: none;
}

.data-section.loaded {
  display: block;
}

/* ═══════════════════════════════════════════════════════
   Dashboard: Stats Cards
   ═══════════════════════════════════════════════════════ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
  text-align: center;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'SF Mono', Monaco, monospace;
}

.stat-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* ═══════════════════════════════════════════════════════
   Dashboard: Charts Grid
   ═══════════════════════════════════════════════════════ */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.chart-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.chart-card.full-width {
  grid-column: 1 / -1;
}

.chart-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.chart-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  text-align: center;
}

.chart-container {
  position: relative;
  height: 300px;
}

.chart-container.tall {
  height: 400px;
}

/* ═══════════════════════════════════════════════════════
   Explorer: Search & Header
   ═══════════════════════════════════════════════════════ */
.explorer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.search-box {
  padding: 0.625rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  background: var(--surface);
  color: var(--text-primary);
  min-width: 280px;
  font-family: var(--font-family-base);
}

.search-box:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.15);
}

html.dark .search-box:focus {
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.25);
}

/* ═══════════════════════════════════════════════════════
   Explorer: Data Table
   ═══════════════════════════════════════════════════════ */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th {
  background: var(--surface-alt);
  padding: 1rem 0.75rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-light);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease;
  white-space: nowrap;
}

.data-table th:hover {
  background: var(--border-light);
}

.data-table th .sort-icon {
  display: inline-block;
  margin-left: 0.4rem;
  opacity: 0.3;
  transition: opacity 0.2s, transform 0.2s;
  vertical-align: middle;
}

.data-table th[aria-sort="ascending"] .sort-icon,
.data-table th[aria-sort="descending"] .sort-icon {
  opacity: 1;
}

.data-table th[aria-sort="descending"] .sort-icon {
  transform: rotate(180deg);
}

.data-table td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
}

.data-table tbody tr:hover {
  background: var(--primary-lightest);
}

/* Table Cell Variants */
.cve-cell {
  font-family: 'SF Mono', Monaco, 'Menlo', monospace;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

.score-cell {
  font-weight: 600;
  text-align: center;
  white-space: nowrap;
}

.severity-critical { color: #d32f2f; }
.severity-high { color: var(--error); }
.severity-medium { color: var(--warning-alt); }
.severity-low { color: var(--success-alt); }

html.dark .severity-critical { color: #ef5350; }
html.dark .severity-high { color: #f06292; }
html.dark .severity-medium { color: #ffb74d; }
html.dark .severity-low { color: #81c784; }

.severity-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-left: 0.35rem;
}

.epss-cell {
  text-align: center;
  font-family: 'SF Mono', Monaco, 'Menlo', monospace;
}

.date-cell {
  font-family: 'SF Mono', Monaco, 'Menlo', monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.source-badge {
  font-size: 0.75rem;
  background: var(--border-light);
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius-sm);
  display: inline-block;
  margin: 0.1rem;
  color: var(--text-secondary);
}

/* ═══════════════════════════════════════════════════════
   Pagination
   ═══════════════════════════════════════════════════════ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.pagination button {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s;
  font-family: var(--font-family-base);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-lightest);
}

.pagination button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.pagination button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-info {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0.5rem;
}

/* ═══════════════════════════════════════════════════════
   Overview Statistics Panel
   ═══════════════════════════════════════════════════════ */
.overview-stats {
  margin-top: 2.5rem;
}

.overview-stats-header {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: white;
  padding: 1.5rem 2rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.overview-stats-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.overview-stats-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.25rem 0;
  position: relative;
  z-index: 1;
}

.overview-stats-subtitle-text {
  font-size: 0.9rem;
  opacity: 0.8;
  font-weight: 400;
  position: relative;
  z-index: 1;
}

.overview-stats-body {
  background: var(--gradient-subtle);
  border: 1px solid var(--border-light);
  border-top: none;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  padding: 2rem;
}

.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.overview-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
}

.overview-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.overview-card.full-span {
  grid-column: 1 / -1;
  flex-direction: column;
  align-items: flex-start;
}

.overview-icon {
  font-size: 2rem;
}

.overview-info {
  flex: 1;
}

.overview-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.overview-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: 'SF Mono', Monaco, monospace;
  line-height: 1;
}

.overview-value.small {
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.4;
  background: var(--surface-tertiary);
  padding: 0.75rem;
  border-radius: 6px;
  margin-top: 0.25rem;
  font-family: 'SF Mono', Monaco, monospace;
  word-break: break-all;
}

.overview-header-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
}

/* CPE List in Overview */
.cpe-list {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}

.cpe-list li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 0.75rem 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-lighter);
  gap: 1rem;
  margin-bottom: 0;
}

.cpe-list li:last-child {
  border-bottom: none;
}

.cpe-list li:hover {
  background: var(--surface-alt);
  margin: 0 -0.5rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  border-radius: 6px;
}

.cpe-list .cpe-name {
  flex: 1;
  word-break: break-word;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.8rem;
}

.cpe-list .cpe-count {
  font-weight: 700;
  color: #f59e0b;
  background: #fef3c7;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  min-width: 2rem;
  text-align: center;
}

html.dark .cpe-list .cpe-count {
  color: #fde047;
  background: #422006;
}

/* ═══════════════════════════════════════════════════════
   Sources Section
   ═══════════════════════════════════════════════════════ */
.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.source-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}

.source-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--primary);
}

.source-icon {
  font-size: 2.5rem;
}

.source-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
}

.source-card h3 a {
  color: var(--primary);
  text-decoration: none;
}

.source-card h3 a:hover {
  text-decoration: underline;
}

.source-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.5;
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════════════ */
.site-footer {
  background: var(--dark);
  color: var(--text-on-dark);
  padding: 2rem;
  text-align: center;
  margin-top: 3rem;
}

.site-footer a {
  color: var(--primary-light);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ═══════════════════════════════════════════════════════
   Severity Badges
   ═══════════════════════════════════════════════════════ */
.badge {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
}

.badge-critical {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.badge-high {
  background: #fff7ed;
  color: #ea580c;
  border: 1px solid #fed7aa;
}

.badge-medium {
  background: #fefce8;
  color: #ca8a04;
  border: 1px solid #fef08a;
}

.badge-low {
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

html.dark .badge-critical {
  background: #450a0a;
  color: #fca5a5;
  border-color: #7f1d1d;
}

html.dark .badge-high {
  background: #431407;
  color: #fdba74;
  border-color: #7c2d12;
}

html.dark .badge-medium {
  background: #422006;
  color: #fde047;
  border-color: #713f12;
}

html.dark .badge-low {
  background: #052e16;
  color: #86efac;
  border-color: #14532d;
}

/* ═══════════════════════════════════════════════════════
   Skeleton Loading Animation
   ═══════════════════════════════════════════════════════ */
@keyframes skeleton {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.skeleton {
  animation: skeleton 1.5s ease-in-out infinite;
  background: var(--border-light);
  border-radius: var(--border-radius-sm);
}

/* ═══════════════════════════════════════════════════════
   Responsive: Tablet (768px)
   ═══════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .hero-section {
    padding: 3rem 1.5rem 2rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .trust-indicators {
    gap: 1.5rem;
  }

  .charts-grid {
    grid-template-columns: 1fr;
  }

  .stat-value {
    font-size: 2rem;
  }

  .spa-section {
    padding: 2rem 1rem;
  }

  .overview-grid {
    grid-template-columns: 1fr;
  }

  /* Nav stacks on mobile */
  .nav-container {
    padding: 0 1rem;
    gap: 0;
    flex-wrap: wrap;
    height: auto;
    min-height: 56px;
  }

  .nav-link {
    padding: 0.5rem 0.6rem;
    font-size: 0.8rem;
  }

  .search-box {
    min-width: 100%;
  }

  .explorer-header {
    flex-direction: column;
    align-items: stretch;
  }

  .sources-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  main {
    padding: 0 1rem;
  }
}

/* ═══════════════════════════════════════════════════════
   Responsive: Small Mobile (480px)
   ═══════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-section {
    padding: 2rem 1rem 1.5rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .stat-value {
    font-size: 1.75rem;
  }

  .overview-value {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .source-card {
    padding: 1rem;
    flex-direction: column;
  }

  .trust-indicators {
    gap: 1rem;
    flex-direction: column;
  }

  .nav-container {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem;
  }

  .nav-link {
    text-align: center;
    padding: 0.5rem;
  }

  .nav-spacer {
    display: none;
  }

  .dark-toggle {
    align-self: center;
    margin-top: 0.25rem;
    margin-bottom: 0.25rem;
  }

  .pagination {
    gap: 0.25rem;
    padding: 0.75rem;
  }

  .pagination button {
    padding: 0.35rem 0.6rem;
    font-size: 0.75rem;
  }
}