/* Modern Dark Theme CSS Framework for Bill Bear */

/* CSS Custom Properties */
:root {
  /* Colors */
  --bg-primary: #0A0A0A;
  --bg-secondary: #121212;
  --bg-tertiary: #1E1E1E;
  --bg-card: rgba(30, 30, 30, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.05);
  
  --accent-blue: #00D4FF;
  --accent-green: #00FF88;
  --accent-purple: #8B5CF6;
  --accent-pink: #FF006E;
  --accent-orange: #FF8500;
  
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-accent: var(--accent-blue);
  
  --border-primary: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(0, 212, 255, 0.3);
  
  /* Shadows & Glows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
  
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
  --glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
  --glow-purple: 0 0 20px rgba(139, 92, 246, 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;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Typography */
  --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
  --font-size-base: clamp(1rem, 3vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
  --font-size-3xl: clamp(2rem, 6vw, 2.5rem);
  --font-size-4xl: clamp(2.5rem, 7vw, 3rem);
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
  animation: backgroundShift 20s ease-in-out infinite alternate;
  z-index: -1;
}

@keyframes backgroundShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-20px, -20px) rotate(1deg); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

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

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

a:hover {
  color: var(--accent-blue);
  text-shadow: var(--glow-blue);
}

/* Glass Morphism Components */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-primary);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-accent);
}

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

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: 1280px; }

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

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

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

/* Spacing Utilities */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }

/* Modern Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  min-height: 44px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}

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

.btn-success {
  background: linear-gradient(135deg, var(--accent-green) 0%, #00CC77 100%);
  color: var(--bg-primary);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--glow-green);
}

.btn-danger {
  background: linear-gradient(135deg, #FF4757 0%, #FF3838 100%);
  color: white;
}

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

.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  min-height: 36px;
}

/* Modern Form Elements */
.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  transition: all var(--transition-fast);
}

.form-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  min-height: 48px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-base);
  transition: all var(--transition-normal);
  appearance: none;
}

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

.form-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1), var(--glow-blue);
  transform: translateY(-1px);
}

.form-input:invalid {
  border-color: #FF4757;
}

/* Floating Labels */
.floating-label {
  position: relative;
}

.floating-label .form-input {
  padding-top: var(--space-lg);
}

.floating-label .form-label {
  position: absolute;
  top: 50%;
  left: var(--space-lg);
  transform: translateY(-50%);
  transition: all var(--transition-normal);
  pointer-events: none;
  background: var(--bg-tertiary);
  padding: 0 var(--space-xs);
}

.floating-label .form-input:focus + .form-label,
.floating-label .form-input:not(:placeholder-shown) + .form-label {
  top: 0;
  font-size: var(--font-size-xs);
  color: var(--accent-blue);
  transform: translateY(-50%);
}

/* File Upload */
.file-upload {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  border: 2px dashed var(--border-primary);
  border-radius: var(--radius-lg);
  background: var(--bg-tertiary);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.file-upload:hover {
  border-color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.05);
}

.file-upload.dragover {
  border-color: var(--accent-green);
  background: rgba(0, 255, 136, 0.05);
  transform: scale(1.02);
}

.file-upload-input {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-upload-content {
  text-align: center;
  padding: var(--space-lg);
}

.file-upload-icon {
  font-size: var(--font-size-4xl);
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

/* Progress Bar */
.progress {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.2) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}

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

/* Loading States */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-top: 2px solid var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-card) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Toast Notifications */
.toast {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  min-width: 300px;
  box-shadow: var(--shadow-xl);
  z-index: var(--z-toast);
  transform: translateX(400px);
  animation: slideIn var(--transition-normal) forwards;
}

.toast.success {
  border-color: var(--accent-green);
  box-shadow: var(--shadow-xl), var(--glow-green);
}

.toast.error {
  border-color: #FF4757;
  box-shadow: var(--shadow-xl), 0 0 20px rgba(255, 71, 87, 0.3);
}

@keyframes slideIn {
  to { transform: translateX(0); }
}

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

.ripple::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.ripple:active::before {
  width: 300px;
  height: 300px;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 30px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translate3d(0, -30px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes bounceIn {
  0%, 20%, 40%, 60%, 80%, 100% {
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  }
  0% {
    opacity: 0;
    transform: scale3d(0.3, 0.3, 0.3);
  }
  20% {
    transform: scale3d(1.1, 1.1, 1.1);
  }
  40% {
    transform: scale3d(0.9, 0.9, 0.9);
  }
  60% {
    opacity: 1;
    transform: scale3d(1.03, 1.03, 1.03);
  }
  80% {
    transform: scale3d(0.97, 0.97, 0.97);
  }
  100% {
    opacity: 1;
    transform: scale3d(1, 1, 1);
  }
}

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

.animate-fadeInDown {
  animation: fadeInDown 0.6s ease-out;
}

.animate-bounceIn {
  animation: bounceIn 0.8s;
}

/* Stagger Animation */
.stagger > * {
  opacity: 0;
  animation: fadeInUp 0.6s ease-out forwards;
}

.stagger > *:nth-child(1) { animation-delay: 0.1s; }
.stagger > *:nth-child(2) { animation-delay: 0.2s; }
.stagger > *:nth-child(3) { animation-delay: 0.3s; }
.stagger > *:nth-child(4) { animation-delay: 0.4s; }
.stagger > *:nth-child(5) { animation-delay: 0.5s; }

/* Responsive Design */
@media (max-width: 480px) {
  :root {
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.25rem;
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .btn {
    width: 100%;
    min-height: 48px;
  }
  
  .toast {
    left: var(--space-sm);
    right: var(--space-sm);
    min-width: auto;
  }
}

@media (min-width: 768px) {
  .grid-md-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-md-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-md-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .grid-lg-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-lg-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-lg-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus States */
.focus-visible:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* High Contrast Support */
@media (prefers-contrast: high) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #111111;
    --bg-tertiary: #222222;
    --text-primary: #FFFFFF;
    --border-primary: rgba(255, 255, 255, 0.3);
  }
}

/* Print Styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
  }
}