/*
 * FlowLab Design System - Cosmic Flow Edition
 * 미래지향적 디자인 시스템
 * ========================================
 */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ========================================
   CSS Custom Properties (Cosmic Theme)
   ======================================== */
:root {
  /* Cosmic Background Colors */
  --cosmic-black: #0a0a0f;
  --cosmic-dark: #12121a;
  --cosmic-deep: #1a1a2e;
  --cosmic-surface: #16213e;

  /* Neon Accent Colors */
  --neon-cyan: #00f5d4;
  --neon-cyan-dim: rgba(0, 245, 212, 0.5);
  --neon-purple: #7b2cbf;
  --neon-purple-light: #c77dff;
  --neon-magenta: #ff006e;
  --neon-magenta-dim: rgba(255, 0, 110, 0.5);
  --neon-blue: #4361ee;
  --neon-blue-light: #4cc9f0;

  /* Gradient Presets */
  --gradient-cosmic: linear-gradient(135deg, var(--cosmic-black) 0%, var(--cosmic-deep) 50%, var(--cosmic-surface) 100%);
  --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(123, 44, 191, 0.3) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(0, 245, 212, 0.15) 0%, transparent 40%),
    radial-gradient(ellipse at 20% 60%, rgba(255, 0, 110, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, var(--cosmic-black) 0%, var(--cosmic-dark) 100%);
  --gradient-neon: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple-light) 50%, var(--neon-magenta) 100%);
  --gradient-glow: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-blue-light) 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(0, 245, 212, 0.3);
  --glass-blur: blur(20px);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;
  --text-7xl: 6rem;

  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);
  --text-muted: rgba(255, 255, 255, 0.3);

  /* Background Colors */
  --bg-primary: var(--cosmic-black);
  --bg-secondary: var(--cosmic-dark);
  --bg-tertiary: var(--cosmic-deep);

  /* Border Colors */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-glow: var(--neon-cyan);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Shadows & Glows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
  --glow-cyan: 0 0 30px rgba(0, 245, 212, 0.4), 0 0 60px rgba(0, 245, 212, 0.2);
  --glow-purple: 0 0 30px rgba(123, 44, 191, 0.4), 0 0 60px rgba(123, 44, 191, 0.2);
  --glow-magenta: 0 0 30px rgba(255, 0, 110, 0.4);
  --glow-text: 0 0 40px rgba(0, 245, 212, 0.5);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 500;
  --z-tooltip: 700;

  /* Container */
  --container-max: 1400px;
  --container-padding: var(--space-6);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  background: var(--neon-cyan);
  color: var(--cosmic-black);
}

/* ========================================
   Typography Utilities
   ======================================== */
.text-gradient {
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-glow {
  text-shadow: var(--glow-text);
}

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

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

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%, rgba(0, 245, 212, 0.1) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

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

/* ========================================
   Component: Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--gradient-glow);
  color: var(--cosmic-black);
  box-shadow: var(--glow-cyan);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 40px rgba(0, 245, 212, 0.6), 0 0 80px rgba(0, 245, 212, 0.3);
}

.btn-primary:hover::before {
  transform: translateX(100%);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  backdrop-filter: var(--glass-blur);
}

.btn-secondary:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  box-shadow: inset 0 0 20px rgba(0, 245, 212, 0.1), var(--glow-cyan);
}

.btn-lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

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

@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

@keyframes pulse-glow {

  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) rotate(45deg);
  }

  100% {
    transform: translateX(100%) rotate(45deg);
  }
}

@keyframes rotate-slow {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes morph {

  0%,
  100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }

  50% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* ========================================
   Responsive Breakpoints
   ======================================== */
@media (max-width: 1024px) {
  :root {
    --text-5xl: 3rem;
    --text-6xl: 3.5rem;
    --text-7xl: 4.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --text-4xl: 2rem;
    --text-5xl: 2.5rem;
    --text-6xl: 3rem;
    --container-padding: var(--space-4);
  }
}

@media (max-width: 480px) {
  :root {
    --text-3xl: 1.75rem;
    --text-4xl: 1.875rem;
    --text-5xl: 2rem;
    --text-6xl: 2.5rem;
  }
}