/**
 * XJJ Video Platform - Neumorphic Design System
 * Modern UI with soft shadows, gradients, and 3D effects
 */

:root {
  /* Color Palette - Light Mode */
  --bg-primary: #e0e5ec;
  --bg-secondary: #f0f0f3;
  --bg-card: #ffffff;
  --text-primary: #1c1c1e;
  --text-secondary: #6e6e73;
  --text-tertiary: #8e8e93;
  
  /* Accent Colors */
  --color-primary: #007aff;
  --color-primary-dark: #005ecb;
  --color-primary-light: #3395ff;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-error: #ff3b30;
  --color-info: #5ac8fa;
  
  /* Neumorphic Shadows */
  --shadow-light: -6px -6px 14px rgba(255, 255, 255, .7);
  --shadow-dark: 6px 6px 14px rgba(0, 0, 0, .1);
  --shadow-inset-light: inset -4px -4px 8px rgba(255, 255, 255, .5);
  --shadow-inset-dark: inset 4px 4px 8px rgba(0, 0, 0, .1);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;
}

/* Dark Mode Colors */
[data-theme="dark"] {
  --bg-primary: #1c1c1e;
  --bg-secondary: #2c2c2e;
  --bg-card: #3a3a3c;
  --text-primary: #ffffff;
  --text-secondary: #aeaeb2;
  --text-tertiary: #8e8e93;
  
  --shadow-light: -6px -6px 14px rgba(255, 255, 255, .05);
  --shadow-dark: 6px 6px 14px rgba(0, 0, 0, .4);
  --shadow-inset-light: inset -4px -4px 8px rgba(255, 255, 255, .03);
  --shadow-inset-dark: inset 4px 4px 8px rgba(0, 0, 0, .3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  transition: background var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Neumorphic Elements */
.neu-flat {
  background: var(--bg-secondary);
  box-shadow: var(--shadow-light), var(--shadow-dark);
  transition: all var(--transition-normal);
}

.neu-pressed {
  background: var(--bg-primary);
  box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

.neu-float {
  background: var(--bg-card);
  box-shadow: -8px -8px 16px rgba(255, 255, 255, .7),
              8px 8px 16px rgba(0, 0, 0, .15);
}

.neu-convex {
  background: linear-gradient(145deg, #f0f0f3, #cacaca);
  box-shadow: var(--shadow-light), var(--shadow-dark);
}

.neu-concave {
  background: linear-gradient(145deg, #cacaca, #f0f0f3);
  box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

/* Buttons */
.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 6px 16px rgba(0, 122, 255, 0.4);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

.btn-neu {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-light), var(--shadow-dark);
}

.btn-neu:hover {
  box-shadow: -8px -8px 16px rgba(255, 255, 255, .8),
              8px 8px 16px rgba(0, 0, 0, .15);
}

.btn-neu:active {
  box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

/* Ripple Effect */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-ripple:active::after {
  width: 300px;
  height: 300px;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-light), var(--shadow-dark);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: -10px -10px 20px rgba(255, 255, 255, .8),
              10px 10px 20px rgba(0, 0, 0, .2);
  transform: translateY(-4px);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:active {
  transform: translateY(0);
  box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
}

/* Input Fields */
.input {
  width: 100%;
  padding: var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  box-shadow: var(--shadow-inset-light), var(--shadow-inset-dark);
  transition: all var(--transition-normal);
}

.input:focus {
  outline: none;
  box-shadow: inset -2px -2px 6px rgba(255, 255, 255, .7),
              inset 2px 2px 6px rgba(0, 0, 0, .15),
              0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { justify-content: center; align-items: center; }
.flex-between { justify-content: space-between; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

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

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

.fade-in {
  animation: fadeIn 0.5s ease;
}

.slide-in {
  animation: slideIn 0.3s ease;
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Loading Skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 0%,
    var(--bg-card) 50%,
    var(--bg-secondary) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
  border-radius: var(--radius-md);
}

/* Responsive */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: var(--spacing-md);
  }
}

/* Dark Mode Toggle */
.theme-toggle {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-light), var(--shadow-dark);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
}

.theme-toggle:hover {
  transform: rotate(180deg) scale(1.1);
}

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

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

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

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); }
.shadow-lg { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2); }