:root {
  --bg-primary: #0a0f1d;
  --bg-secondary: #111827;
  --bg-card: #1e293b;
  --bg-card-hover: #26354a;
  --border-color: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --docker-blue: #0ea5e9;
  --docker-blue-glow: rgba(14, 165, 233, 0.2);
  --podman-purple: #a855f7;
  --podman-purple-glow: rgba(168, 85, 247, 0.2);
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(10, 15, 29, 0.85);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.badge-vs {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--docker-blue), var(--podman-purple));
  color: white;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 350px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, rgba(14, 165, 233, 0.15) 50%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  line-height: 1.15;
}

.gradient-docker {
  color: var(--docker-blue);
}

.gradient-podman {
  color: var(--podman-purple);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 36px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 48px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: left;
  transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Sections */
.section {
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--docker-blue);
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 700px;
}

/* Comparison Cards Grid */
.dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.engine-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.engine-card.docker {
  border-top: 4px solid var(--docker-blue);
}

.engine-card.podman {
  border-top: 4px solid var(--podman-purple);
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.engine-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.25rem;
}

.docker .engine-icon {
  background: var(--docker-blue-glow);
  color: var(--docker-blue);
}

.podman .engine-icon {
  background: var(--podman-purple-glow);
  color: var(--podman-purple);
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.feature-bullet {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-top: 8px;
  flex-shrink: 0;
}

.docker .feature-bullet { background: var(--docker-blue); }
.podman .feature-bullet { background: var(--podman-purple); }

/* Interactive Comparison Table */
.table-wrapper {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow-x: auto;
  margin-top: 24px;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th {
  background: var(--bg-card);
  padding: 16px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 16px 20px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge.podman-win {
  background: var(--podman-purple-glow);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.badge.docker-win {
  background: var(--docker-blue-glow);
  color: #38bdf8;
  border: 1px solid rgba(14, 165, 233, 0.4);
}

.badge.tie {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.4);
}

/* Code Snippet Blocks */
.code-box {
  background: #0d1117;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: 16px 0;
  overflow: hidden;
  font-family: var(--font-mono);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #161b22;
  padding: 10px 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

pre {
  padding: 16px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #e6edf3;
}

/* Registry Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.registry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.registry-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.2);
}

.registry-card h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.registry-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--docker-blue);
  background: rgba(14, 165, 233, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Footer */
footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .dual-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}