/* VibeCheck Design System - Generated from DESIGN.md */

:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #151520;
  --bg-tertiary: #1f1f2e;
  --bg-glass: rgba(21, 21, 32, 0.6);
  
  --neon-cyan: #00f0ff;
  --neon-magenta: #ff00ff;
  --neon-pink: #ff006e;
  --neon-purple: #a855f7;
  --neon-blue: #3b82f6;
  --neon-green: #00ff88;
  --neon-yellow: #ffea00;
  
  --gradient-primary: linear-gradient(135deg, #00f0ff 0%, #a855f7 50%, #ff006e 100%);
  --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #ff00ff 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.3), transparent 70%);
  
  --text-primary: #ffffff;
  --text-secondary: #b4b4c8;
  --text-muted: #6e6e88;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.3);
  
  /* 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;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --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: 3rem;
  
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-black: 900;
  
  --leading-tight: 1.2;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* 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 24px rgba(168, 85, 247, 0.4);
  --shadow-glow-strong: 0 0 32px rgba(0, 240, 255, 0.6);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 768px) {
  :root {
    --text-3xl: 2.5rem;
    --text-4xl: 3rem;
    --text-5xl: 4rem;
  }
}

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

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

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

::selection {
  background: var(--neon-cyan);
  color: var(--bg-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-4xl); font-weight: var(--font-black); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }

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

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

a:hover {
  color: var(--neon-magenta);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: 1;
  text-align: center;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

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

.btn-primary:hover {
  box-shadow: var(--shadow-glow-strong);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--neon-cyan);
  border: 2px solid var(--neon-cyan);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(0, 240, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-lg);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* Form Inputs */
.input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  outline: none;
  transition: all var(--transition-base);
}

.input:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
}

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

textarea.input {
  min-height: 120px;
  resize: vertical;
  line-height: var(--leading-relaxed);
}

/* Sliders */
.slider-group {
  margin-bottom: var(--space-xl);
}

.slider-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.slider-name {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.slider-value {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  min-width: 3ch;
  text-align: right;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  transition: all var(--transition-base);
}

.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  border: none;
  transition: all var(--transition-base);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-glow-strong);
}

/* Emoji Picker */
.emoji-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(3rem, 1fr));
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  max-height: 300px;
  overflow-y: auto;
}

.emoji-option {
  aspect-ratio: 1;
  font-size: var(--text-3xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.emoji-option:hover {
  background: var(--bg-primary);
  transform: scale(1.1);
}

.emoji-option.selected {
  border-color: var(--neon-cyan);
  background: var(--bg-primary);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
  transform: scale(1.15);
}

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

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

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

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

.animate-scale-in {
  animation: scaleIn 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Landing Page */
.landing-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
}

.landing-page::before,
.landing-page::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.2;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

.landing-page::before {
  width: 400px;
  height: 400px;
  background: var(--neon-purple);
  top: -100px;
  left: -100px;
}

.landing-page::after {
  width: 300px;
  height: 300px;
  background: var(--neon-cyan);
  bottom: -50px;
  right: -50px;
  animation-delay: -3s;
}

.landing-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.landing-logo {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-md);
}

.landing-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-black);
  margin-bottom: var(--space-lg);
}

.landing-subtitle {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.landing-footer {
  position: absolute;
  bottom: var(--space-xl);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

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

.hidden {
  display: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--neon-cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  font-weight: var(--font-semibold);
  z-index: 1000;
  animation: fadeInUp 0.4s ease-out;
}

.toast.success {
  border: 2px solid var(--neon-green);
}

.toast.error {
  border: 2px solid var(--neon-pink);
}

@media (max-width: 480px) {
  .landing-title {
    font-size: var(--text-3xl);
  }
  
  .landing-subtitle {
    font-size: var(--text-base);
  }
}