/* ===== CSS Variables ===== */
:root {
  --color-primary: #00d4ff;
  --color-primary-dark: #0099cc;
  --color-secondary: #7c3aed;
  --color-accent: #f59e0b;
  --color-danger: #ef4444;
  --color-success: #10b981;
  --color-bg: #0a0e1a;
  --color-bg-secondary: #111827;
  --color-bg-card: #1a2332;
  --color-bg-card-hover: #1f2b3d;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-heading: #f8fafc;
  --color-border: #2d3748;
  --color-border-light: #374151;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
  --transition: 0.3s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;
  --max-width: 1200px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }

/* ===== Utility ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* ===== Header & Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 20px;
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-heading);
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-menu a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-secondary);
  z-index: 999;
  padding: 20px;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}
.mobile-nav.active { display: flex; }
.mobile-nav a {
  display: block;
  padding: 12px 16px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: 1rem;
}
.mobile-nav a:hover { background: var(--color-bg-card); color: var(--color-primary); }

/* ===== Hero Section ===== */
.hero {
  position: relative;
  padding: 80px 20px;
  text-align: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.3;
}
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-text-heading);
  margin-bottom: 16px;
  line-height: 1.3;
}
.hero .subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}

/* ===== Search Box ===== */
.search-box {
  max-width: 600px;
  margin: 0 auto 40px;
  position: relative;
}
.search-box input {
  width: 100%;
  padding: 16px 56px 16px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  color: var(--color-text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}
.search-box input::placeholder { color: var(--color-text-muted); }
.search-box button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  border: none;
  color: var(--color-bg);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background var(--transition);
}
.search-box button:hover { background: var(--color-primary-dark); }
.search-suggestions {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
}
.search-suggestions.active { display: block; }
.search-suggestions a {
  display: block;
  padding: 10px 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
.search-suggestions a:hover { background: var(--color-bg-card-hover); }

/* ===== Cards & Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin: 32px 0;
}
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
.card h3 {
  font-size: 1.15rem;
  color: var(--color-text-heading);
  margin-bottom: 8px;
}
.card p { font-size: 0.9rem; color: var(--color-text-muted); }
.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== Index Cards (Stats) ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin: 32px 0;
}
.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  transition: border-color var(--transition);
}
.stat-card:hover { border-color: var(--color-primary); }
.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  font-family: var(--font-mono);
}
.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}
.stat-card .stat-trend {
  font-size: 0.8rem;
  margin-top: 8px;
}
.stat-card .stat-trend.up { color: var(--color-success); }
.stat-card .stat-trend.down { color: var(--color-danger); }

/* ===== Section ===== */
.section {
  padding: 60px 20px;
}
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: 1.75rem;
  color: var(--color-text-heading);
  margin-bottom: 12px;
}
.section-header p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}
.section-alt { background: var(--color-bg-secondary); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { margin: 0 8px; }

/* ===== Page Header ===== */
.page-header {
  padding: 40px 20px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.page-header h1 {
  font-size: 2rem;
  color: var(--color-text-heading);
  margin-bottom: 12px;
}
.page-header p {
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
}
.page-hero-img {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin: 24px auto;
  max-width: 800px;
}

/* ===== Content Area ===== */
.content-area {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}
.content-area h2 {
  font-size: 1.5rem;
  color: var(--color-text-heading);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}
.content-area h3 {
  font-size: 1.2rem;
  color: var(--color-text-heading);
  margin: 24px 0 12px;
}
.content-area p { margin-bottom: 16px; }
.content-area ul, .content-area ol {
  padding-left: 24px;
  margin-bottom: 16px;
}
.content-area li {
  list-style: disc;
  margin-bottom: 8px;
  color: var(--color-text-muted);
}

/* ===== FAQ ===== */
.faq-list { margin: 24px 0; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  padding: 16px 20px;
  background: var(--color-bg-card);
  border: none;
  color: var(--color-text-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--color-bg-card-hover); }
.faq-question::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--color-primary);
  transition: transform var(--transition);
}
.faq-item.active .faq-question::after {
  content: "−";
}
.faq-answer {
  display: none;
  padding: 16px 20px;
  background: var(--color-bg-secondary);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { display: block; }

/* ===== Tabs ===== */
.tabs { margin: 24px 0; }
.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
  overflow-x: auto;
}
.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all var(--transition);
}
.tab-btn.active, .tab-btn:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Table ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}
.data-table th, .data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.data-table th {
  background: var(--color-bg-card);
  color: var(--color-text-heading);
  font-weight: 600;
}
.data-table tr:hover td { background: var(--color-bg-card); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
}
.btn-primary:hover { background: var(--color-primary-dark); color: var(--color-bg); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: var(--color-bg); }
.btn-ghost {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ===== Form ===== */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-heading);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--color-primary);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 80px;
  right: 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  color: var(--color-success);
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  transform: translateX(120%);
  transition: transform 0.4s ease;
}
.toast.show { transform: translateX(0); }

/* ===== PWA Install Banner ===== */
.pwa-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: 16px 20px;
  z-index: 9998;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.pwa-banner.show { display: flex; }
.pwa-banner p { font-size: 0.9rem; color: var(--color-text); }
.pwa-banner .btn { padding: 8px 16px; font-size: 0.85rem; }
.pwa-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.2rem;
  cursor: pointer;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-bg);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
  box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-2px); }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 48px 20px 24px;
}
.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 {
  font-size: 0.95rem;
  color: var(--color-text-heading);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  padding: 4px 0;
}
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ===== Compliance Notice ===== */
.compliance-notice {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== Risk Level Badge ===== */
.risk-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}
.risk-high { background: rgba(239,68,68,0.15); color: var(--color-danger); }
.risk-medium { background: rgba(245,158,11,0.15); color: var(--color-accent); }
.risk-low { background: rgba(16,185,129,0.15); color: var(--color-success); }

/* ===== Timeline ===== */
.timeline { margin: 24px 0; padding-left: 24px; border-left: 2px solid var(--color-border); }
.timeline-item { margin-bottom: 24px; position: relative; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
}
.timeline-date { font-size: 0.8rem; color: var(--color-primary); font-weight: 600; margin-bottom: 4px; }
.timeline-content { font-size: 0.9rem; color: var(--color-text-muted); }

/* ===== Related Links ===== */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}
.related-links a {
  padding: 8px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.related-links a:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ===== 404 Page ===== */
.error-page {
  text-align: center;
  padding: 80px 20px;
}
.error-page .error-code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.3;
  font-family: var(--font-mono);
}
.error-page h1 { font-size: 1.75rem; margin: 16px 0; }
.error-page p { color: var(--color-text-muted); margin-bottom: 32px; }

/* ===== Subscribe Box ===== */
.subscribe-box {
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-secondary));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
}
.subscribe-box h3 { color: var(--color-text-heading); margin-bottom: 12px; }
.subscribe-box p { color: var(--color-text-muted); margin-bottom: 20px; font-size: 0.9rem; }
.subscribe-form {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto;
}
.subscribe-form input {
  flex: 1;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  outline: none;
}
.subscribe-form input:focus { border-color: var(--color-primary); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-menu { display: none; }
  .mobile-toggle { display: block; }
  .hero h1 { font-size: 1.75rem; }
  .hero .subtitle { font-size: 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .subscribe-form { flex-direction: column; }
  .tab-nav { gap: 0; }
  .tab-btn { padding: 10px 12px; font-size: 0.8rem; }
  .section { padding: 40px 20px; }
  .page-header h1 { font-size: 1.5rem; }
  .header-inner { height: 56px; }
  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 8px 10px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 50px 16px; }
}