/* ==========================================================================
   CARBONLIGHT — LUXURY AFTERMARKET & TRACK KINEMATICS DESIGN SYSTEM
   Aesthetic: Obsidian Dark (#0a0a0a), Card Surface (#171717), Anodized Red (#dc2626),
              Machined Billet Silver (#a3a3a3)
   ========================================================================== */

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

:root {
  --bg-obsidian: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #171717;
  --bg-card-hover: #1f1f1f;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(255, 255, 255, 0.18);
  --anodized-red: #dc2626;
  --anodized-red-glow: rgba(220, 38, 38, 0.35);
  --billet-silver: #a3a3a3;
  --billet-bright: #e5e5e5;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-obsidian);
  color: #f5f5f5;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  background-color: var(--bg-obsidian);
  color: #f5f5f5;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  selection-background-color: #dc2626;
}

::selection {
  background: rgba(220, 38, 38, 0.85);
  color: #ffffff;
}

/* Typography Utilities */
.font-display {
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: -0.03em;
}

.font-mono-tech {
  font-family: 'JetBrains Mono', monospace;
}

/* --------------------------------------------------------------------------
   2x2 Twill Carbon Fiber Texture & CAD Grid Overlays
   -------------------------------------------------------------------------- */
.bg-carbon-weave {
  background-color: #0a0a0a;
  background-image: 
    linear-gradient(45deg, rgba(255,255,255,0.025) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.025) 75%, rgba(255,255,255,0.025)),
    linear-gradient(45deg, rgba(255,255,255,0.025) 25%, #0c0c0c 25%, #0c0c0c 75%, rgba(255,255,255,0.025) 75%, rgba(255,255,255,0.025));
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
}

.bg-carbon-card {
  background-color: #171717;
  background-image: 
    linear-gradient(45deg, rgba(255,255,255,0.018) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.018) 75%, rgba(255,255,255,0.018)),
    linear-gradient(45deg, rgba(255,255,255,0.018) 25%, #151515 25%, #151515 75%, rgba(255,255,255,0.018) 75%, rgba(255,255,255,0.018));
  background-size: 6px 6px;
  background-position: 0 0, 3px 3px;
}

.bg-cad-grid {
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
}

.bg-cad-grid-fine {
  background-size: 16px 16px;
  background-image: 
    linear-gradient(to right, rgba(220, 38, 38, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(220, 38, 38, 0.06) 1px, transparent 1px);
}

/* --------------------------------------------------------------------------
   Glassmorphism & Surface Effects
   -------------------------------------------------------------------------- */
.glass-navbar {
  background: rgba(10, 10, 10, 0.78);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.glass-navbar.scrolled {
  background: rgba(8, 8, 8, 0.92);
  box-shadow: 0 12px 40px -10px rgba(0, 0, 0, 0.85);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.glass-panel {
  background: rgba(23, 23, 23, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* --------------------------------------------------------------------------
   Buttons & Interactive Elements
   -------------------------------------------------------------------------- */
.btn-anodized {
  background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 20px -2px rgba(220, 38, 38, 0.4);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-anodized:hover {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 8px 28px -2px rgba(220, 38, 38, 0.65);
  transform: translateY(-1px);
}

.btn-anodized:active {
  transform: translateY(0);
}

.btn-billet {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  color: #e5e5e5;
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-billet:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.32);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Product Card & Interactive Elevations */
.card-luxury {
  background-color: #171717;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-luxury:hover {
  transform: translateY(-6px);
  border-color: rgba(220, 38, 38, 0.45);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.85),
              0 0 25px -5px rgba(220, 38, 38, 0.15);
}

/* Metal Serialized Authenticity Card Effect */
.metal-card-surface {
  background: linear-gradient(135deg, #262626 0%, #141414 45%, #0d0d0d 55%, #1f1f1f 100%);
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.9),
    inset 0 1px 1px rgba(255, 255, 255, 0.25);
  position: relative;
  overflow: hidden;
}

.metal-card-surface::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.015) 0px,
    rgba(255, 255, 255, 0.015) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Animations & Keyframes
   -------------------------------------------------------------------------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseSlow {
  0%, 100% {
    opacity: 0.4;
  }
  50% {
    opacity: 0.85;
  }
}

@keyframes scanline {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(1000%);
  }
}

.animate-fade-up {
  animation: fadeUp 0.65s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }

/* Custom Select Inputs */
select.garage-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a3a3a3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
}

select.garage-select:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #0a0a0a;
}

::-webkit-scrollbar-thumb {
  background: #262626;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #dc2626;
}

/* Cockpit Upsell & Complimentary Gift Frosted Glass Cards */
.cockpit-upsell-card {
  background: rgba(18, 18, 18, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: border-color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.cockpit-upsell-card:hover {
  border-color: #dc2626;
  box-shadow: 0 10px 28px -10px rgba(220, 38, 38, 0.35);
}