:root {
  --rs-primary: #2563eb;
  --rs-dark: #0f172a;
  --rs-surface: #f8fafc;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #334155;
  background-color: var(--rs-surface);
  overflow-x: hidden;
}

.hero-section {
  background: radial-gradient(circle at top center, rgba(37, 99, 235, 0.15) 0%, rgba(15, 23, 42, 0) 70%), #0f172a;
}

.font-mono {
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Specs Grid Cards */
.spec-card {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 0.75rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.spec-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px -5px rgba(15, 23, 42, 0.12);
}

/* Interactive Changelog Timeline */
.timeline-container {
  position: relative;
  padding-left: 2rem;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 11px;
  width: 2px;
  background-color: var(--rs-primary);
  transform-origin: top center;
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline-badge {
  position: absolute;
  left: -2rem;
  top: 0.25rem;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: #ffffff;
  border: 2px solid var(--rs-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-badge::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--rs-primary);
}

/* Tag Badges */
.tag-feature { background-color: #dbeafe; color: #1e40af; }
.tag-fix { background-color: #fef3c7; color: #92400e; }
.tag-security { background-color: #fee2e2; color: #991b1b; }
.tag-improvement { background-color: #f3e8ff; color: #6b21a8; }

/* Sticky Sidebar for Specs */
.specs-sidebar {
  position: sticky;
  top: 90px;
}