:root {
  --color-bg: #0a0e14;
  --color-bg-secondary: #111820;
  --color-cyan-primary: #00d4ff;
  --color-cyan-secondary: #00b8d4;
  --color-cyan-accent: #00e5ff;
  --color-cyan-dark: #008ba3;
  --color-text-primary: #ffffff;
  --color-text-secondary: #b0bec5;
  --color-text-muted: #607d8b;
  --color-glass: rgba(0, 212, 255, 0.05);
  --color-glass-border: rgba(0, 212, 255, 0.15);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-body: 'DM Serif Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  --container-max: 1400px;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --nav-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 184, 212, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(0, 229, 255, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 1;
}

a {
  color: var(--color-cyan-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.glass {
  background: var(--color-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--border-radius-md);
}

.glass-strong {
  background: rgba(17, 24, 32, 0.8);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--color-glass-border);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-cyan-primary), var(--color-cyan-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-medium);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  min-height: 48px;
  min-width: 48px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-cyan-primary), var(--color-cyan-secondary));
  color: var(--color-bg);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-cyan-primary);
  border: 2px solid var(--color-cyan-primary);
}

.btn-secondary:hover {
  background: var(--color-cyan-primary);
  color: var(--color-bg);
  transform: translateY(-2px);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.section-subtitle {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-cyan-primary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-sm);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

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

.animate-fade-in {
  animation: fadeIn 0.8s ease forwards;
}

.animate-slide-left {
  animation: slideInLeft 0.6s ease forwards;
}

.animate-slide-right {
  animation: slideInRight 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.15s; }
.delay-3 { animation-delay: 0.2s; }
.delay-4 { animation-delay: 0.25s; }
.delay-5 { animation-delay: 0.3s; }
.delay-6 { animation-delay: 0.35s; }
.delay-7 { animation-delay: 0.4s; }
.delay-8 { animation-delay: 0.45s; }

@media (max-width: 1024px) {
  :root {
    --spacing-md: 1.25rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --nav-height: 60px;
  }

  html {
    font-size: 15px;
  }

  body {
    line-height: 1.6;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    min-height: 48px;
    font-size: 0.9rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 0.875rem;
    --spacing-lg: 1.75rem;
    --spacing-xl: 2.5rem;
    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
  }

  html {
    font-size: 14px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .section-subtitle {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}