/* ============================================
   ORAN INFRA - TECHNICAL DESIGN SYSTEM
   A science-focused, engineering-grade stylesheet
   ============================================ */

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

/* === CSS VARIABLES === */
:root {
  /* Colors - Scientific Palette */
  --bg-primary: #0a0a0f;
  --bg-secondary: rgba(18, 18, 26, 0.4);
  --bg-tertiary: rgba(26, 26, 37, 0.35);
  --bg-card: rgba(18, 18, 26, 0.3);

  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a8;
  --text-muted: #606068;

  --accent-cyan: #00d4ff;
  --accent-green: #39ff14;
  --accent-yellow: #ffcc00;
  --accent-red: #ff4444;
  --accent-purple: #a855f7;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 212, 255, 0.3);

  /* Typography */
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Grid */
  --max-width: 1200px;
  --grid-gap: 1.5rem;

  /* Effects */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* === 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(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Universe Background - Stars */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    /* Bright stars */
    radial-gradient(2px 2px at 10% 15%, rgba(255,255,255,0.9), transparent),
    radial-gradient(2px 2px at 82% 72%, rgba(180,200,255,0.8), transparent),
    radial-gradient(2px 2px at 30% 25%, rgba(255,220,180,0.8), transparent),
    radial-gradient(2px 2px at 65% 10%, rgba(255,255,255,0.85), transparent),
    radial-gradient(2px 2px at 92% 48%, rgba(200,220,255,0.8), transparent),
    /* Medium stars */
    radial-gradient(1.5px 1.5px at 40% 70%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1.5px 1.5px at 85% 40%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1.5px 1.5px at 50% 50%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1.5px 1.5px at 78% 12%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1.5px 1.5px at 18% 88%, rgba(255,240,200,0.6), transparent),
    radial-gradient(1.5px 1.5px at 55% 38%, rgba(200,220,255,0.6), transparent),
    /* Small stars */
    radial-gradient(1px 1px at 25% 35%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 55% 20%, rgba(200,220,255,0.5), transparent),
    radial-gradient(1px 1px at 70% 55%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 15% 80%, rgba(200,200,255,0.5), transparent),
    radial-gradient(1px 1px at 90% 85%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 33% 90%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 5% 50%, rgba(200,220,255,0.4), transparent),
    radial-gradient(1px 1px at 60% 5%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 95% 65%, rgba(200,200,255,0.45), transparent),
    radial-gradient(1px 1px at 45% 30%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 20% 60%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 3% 8%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 17% 45%, rgba(255,200,150,0.35), transparent),
    radial-gradient(1px 1px at 63% 82%, rgba(200,200,255,0.35), transparent),
    radial-gradient(1px 1px at 88% 30%, rgba(255,255,200,0.35), transparent),
    radial-gradient(1px 1px at 42% 12%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 72% 73%, rgba(255,255,255,0.3), transparent),
    /* Faint dust */
    radial-gradient(0.8px 0.8px at 8% 42%, rgba(255,255,255,0.2), transparent),
    radial-gradient(0.8px 0.8px at 37% 58%, rgba(255,255,255,0.2), transparent),
    radial-gradient(0.8px 0.8px at 52% 93%, rgba(255,255,255,0.2), transparent),
    radial-gradient(0.8px 0.8px at 76% 27%, rgba(255,255,255,0.2), transparent),
    radial-gradient(0.8px 0.8px at 97% 15%, rgba(255,255,255,0.2), transparent);
  pointer-events: none;
  z-index: -1;
}

/* Universe Background - Galaxy & Nebula */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    /* === GALAXY — upper right === */
    /* Bright galactic core */
    radial-gradient(ellipse 80px 80px at 78% 25%, rgba(255, 240, 200, 0.25), transparent),
    /* Core warm glow */
    radial-gradient(ellipse 180px 150px at 78% 25%, rgba(255, 200, 120, 0.15), transparent),
    /* Core outer glow */
    radial-gradient(ellipse 300px 250px at 78% 25%, rgba(200, 160, 100, 0.1), transparent),
    /* Spiral arm 1 — elongated */
    radial-gradient(ellipse 600px 60px at 78% 25%, rgba(150, 130, 220, 0.12), transparent),
    /* Spiral arm 2 — perpendicular */
    radial-gradient(ellipse 60px 500px at 78% 25%, rgba(120, 150, 240, 0.1), transparent),
    /* Spiral arm extensions */
    radial-gradient(ellipse 400px 40px at 65% 20%, rgba(100, 120, 200, 0.08), transparent),
    radial-gradient(ellipse 40px 350px at 83% 35%, rgba(130, 100, 180, 0.07), transparent),
    /* Galaxy halo */
    radial-gradient(ellipse 700px 500px at 78% 25%, rgba(60, 40, 120, 0.1), transparent),
    /* Dust lane across core */
    radial-gradient(ellipse 400px 30px at 76% 26%, rgba(5, 2, 15, 0.2), transparent),

    /* === NEBULA 1 — lower left, pink/magenta emission nebula === */
    /* Nebula bright core */
    radial-gradient(ellipse 200px 180px at 18% 75%, rgba(200, 50, 120, 0.2), transparent),
    /* Nebula mid glow */
    radial-gradient(ellipse 350px 300px at 18% 75%, rgba(180, 40, 100, 0.12), transparent),
    /* Nebula outer shell — pink */
    radial-gradient(ellipse 500px 420px at 20% 72%, rgba(150, 30, 80, 0.08), transparent),
    /* Nebula wisp — hot blue region */
    radial-gradient(ellipse 150px 100px at 12% 70%, rgba(60, 120, 255, 0.12), transparent),
    /* Nebula wisp — warm edge */
    radial-gradient(ellipse 120px 180px at 25% 80%, rgba(220, 80, 140, 0.1), transparent),
    /* Internal bright knot */
    radial-gradient(ellipse 60px 50px at 16% 73%, rgba(255, 150, 200, 0.15), transparent),

    /* === NEBULA 2 — center-right, blue reflection nebula === */
    /* Core glow */
    radial-gradient(ellipse 180px 160px at 65% 60%, rgba(40, 80, 200, 0.15), transparent),
    /* Mid region */
    radial-gradient(ellipse 320px 280px at 65% 60%, rgba(30, 60, 160, 0.1), transparent),
    /* Outer extent */
    radial-gradient(ellipse 480px 400px at 63% 58%, rgba(20, 40, 120, 0.07), transparent),
    /* Purple tint edge */
    radial-gradient(ellipse 200px 150px at 70% 55%, rgba(100, 50, 180, 0.1), transparent),
    /* Bright embedded star */
    radial-gradient(3px 3px at 65% 60%, rgba(200, 220, 255, 0.6), transparent),
    radial-gradient(ellipse 30px 30px at 65% 60%, rgba(150, 180, 255, 0.2), transparent),

    /* === Small distant nebula — upper left === */
    radial-gradient(ellipse 120px 90px at 8% 20%, rgba(80, 40, 120, 0.1), transparent),
    radial-gradient(ellipse 60px 50px at 10% 18%, rgba(140, 60, 160, 0.08), transparent),

    /* === Milky Way band — faint diagonal wash === */
    radial-gradient(ellipse 150% 8% at 50% 45%, rgba(60, 50, 100, 0.08), transparent),
    radial-gradient(ellipse 120% 5% at 45% 48%, rgba(40, 35, 80, 0.06), transparent),

    /* === Deep space ambient wash === */
    radial-gradient(ellipse 100% 100% at 50% 50%, rgba(6, 4, 18, 0.4), transparent);
  pointer-events: none;
  z-index: -1;
  transform: rotate(-12deg) scale(1.4);
}

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Monospace / Technical Text */
.mono {
  font-family: var(--font-mono);
}

.tech-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
}

.spec-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}



.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.6);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-cyan);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-cyan);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  padding-top: 8px;
  padding-bottom: 0;
  list-style: none;
  min-width: 140px;
  z-index: 1001;
}

.nav-dropdown-menu::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
}

.nav-dropdown-menu li {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(16px);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
}

.nav-dropdown-menu li:first-child {
  border-top: 1px solid var(--border-color);
  border-radius: 4px 4px 0 0;
}

.nav-dropdown-menu li:last-child {
  border-bottom: 1px solid var(--border-color);
  border-radius: 0 0 4px 4px;
}

.nav-dropdown:hover .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-dropdown-menu a:hover {
  color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.05);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-base);
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-md);
}

.hero h1 {
  margin-bottom: var(--space-lg);
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* Animated Wave Canvas */
.wave-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.3;
  z-index: 0;
}

/* === CARDS === */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.card-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Product Card */
.product-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.product-image {
  width: 100%;
  height: 200px;
  object-fit: contain;
  background: var(--bg-tertiary);
  border-radius: 4px;
  padding: var(--space-md);
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.spec-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 4px;
  color: var(--accent-cyan);
}

/* === SPEC TABLE === */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.spec-table th,
.spec-table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.spec-table th {
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.spec-table td {
  color: var(--text-primary);
}

.spec-table tr:hover {
  background: rgba(0, 212, 255, 0.05);
}

/* === EQUATION BLOCK === */
.equation-block {
  background: rgba(18, 18, 26, 0.2);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-cyan);
  padding: var(--space-xl);
  margin: var(--space-lg) 0;
  border-radius: 0 8px 8px 0;
  overflow-x: auto;
}

.equation-block .katex {
  font-size: 1.2rem;
}

.equation-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

/* === TIMELINE === */
.timeline {
  position: relative;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) - 5px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline-item.current::before {
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    box-shadow: 0 0 10px var(--accent-cyan);
  }

  50% {
    box-shadow: 0 0 20px var(--accent-cyan), 0 0 30px var(--accent-cyan);
  }
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-cyan);
  margin-bottom: var(--space-xs);
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.timeline-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* === CERTIFICATION BADGES === */
.cert-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.cert-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(57, 255, 20, 0.05);
  border: 1px solid rgba(57, 255, 20, 0.2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-green);
}

.cert-badge::before {
  content: none;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 4px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

/* === DIVIDER === */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: var(--space-2xl) 0;
}

/* === PAGE HEADER === */
.page-header {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-2xl);
  text-align: center;
  position: relative;
}

.page-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

/* === CONTENT SECTION === */
.content-section {
  padding: var(--space-2xl) 0;
}

.content-section h2 {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-color);
}

/* === FOOTER === */
.footer {
  background: rgba(18, 18, 26, 0.4);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-logo {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-copy {
  width: 100%;
  text-align: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* === UTILITY CLASSES === */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-cyan {
  color: var(--accent-cyan);
}

.text-green {
  color: var(--accent-green);
}

.text-yellow {
  color: var(--accent-yellow);
}

.text-muted {
  color: var(--text-muted);
}

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

.mb-sm {
  margin-bottom: var(--space-sm);
}

.mb-md {
  margin-bottom: var(--space-md);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-lg);
    gap: var(--space-md);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: 80vh;
    padding-top: calc(80px + var(--space-xl));
  }

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

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .card {
    padding: var(--space-lg);
  }
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes glow {

  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 1;
  }
}

.animate-glow {
  animation: glow 2s ease-in-out infinite;
}

/* === PRINT STYLES === */

/* Cyberpunk Image Tuning */
.product-img-tuned {
  filter: contrast(1.1) brightness(0.9) sepia(0.2) hue-rotate(190deg) saturate(1.1);
  transition: filter 0.3s ease;
}

.product-img-tuned:hover {
  filter: contrast(1.0) brightness(1.0) sepia(0) hue-rotate(0deg) saturate(1.0);
}

@media print {
  .product-img-tuned {
    filter: none;
  }

  body::before {
    display: none;
  }

  .nav,
  .footer {
    display: none;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}