/* ============================================================
   CORE DESIGN SYSTEM
   Variables, Reset, Typography, Animations
   ============================================================ */

:root {
  /* Colors - Liquid Glass Palette */
  --bg-primary: #050711;
  --bg-secondary: #0C1024;
  --bg-glass: rgba(12, 16, 36, 0.6);
  --bg-card: rgba(9, 13, 32, 0.7);
  
  --accent: #4F8CFF;
  --accent-success: #32D489;
  --accent-danger: #FF4F6A;
  --accent-warning: #FFA94D;
  
  --text-main: #E5E5EA;
  --text-soft: #8896C4;
  --text-muted: #6B7A9E;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  
  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(79, 140, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   RESET & BASE STYLES
   ============================================================ */

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

html, body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
}

/* Cosmic Background Animation */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 20% 30%, rgba(79, 140, 255, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 70%, rgba(50, 212, 137, 0.1) 0%, transparent 50%);
  animation: cosmicPulse 8s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes cosmicPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  background: linear-gradient(135deg, #fff, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

h3 {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-soft);
}

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

a:hover {
  color: #fff;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

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

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 10px rgba(79, 140, 255, 0.3); }
  50% { box-shadow: 0 0 20px rgba(79, 140, 255, 0.6); }
}

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

/* ============================================================
   UTILITY CLASSES
   ============================================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-soft { color: var(--text-soft); }
.text-accent { color: var(--accent); }

.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); }

.hidden { display: none !important; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  :root {
    --space-lg: 16px;
    --space-xl: 24px;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
}