/* ============================================
   CODALYX - Premium Design System
   ============================================ */

/* === CSS Variables === */
:root {
  /* Colors - Dark Premium Palette */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a26;
  --color-bg-glass: rgba(26, 26, 38, 0.6);
  
  --color-accent-primary: #00d4ff;
  --color-accent-secondary: #0099ff;
  --color-accent-gold: #ffd700;
  --color-accent-purple: #a855f7;
  
  --color-text-primary: #ffffff;
  --color-text-secondary: #b4b4c8;
  --color-text-muted: #6b6b7f;
  
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-bright: rgba(0, 212, 255, 0.3);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.2);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* === Reset & Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
}

p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* === Layout === */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem var(--spacing-md);
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-purple));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-primary);
  transition: var(--transition-fast);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--color-accent-primary);
}

.nav-links a.active::after {
  width: 100%;
}

.nav-links .btn {
  margin-left: var(--spacing-sm);
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
}

.nav-links .btn::after {
  display: none;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  font-family: var(--font-primary);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, rgba(240, 244, 245, 1) 45%, rgba(13, 83, 130, 1) 100%);
  color: var(--color-bg-primary);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.4);
}

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

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

/* === Cards === */
.card {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

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

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

/* === Grid System === */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

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

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes glow {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

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

/* === Responsive === */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  p {
    font-size: 1rem;
  }
}

/* === Utility Classes === */
.text-center {
  text-align: center;
}

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

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

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }