/**
 * Shared CSS styles for Karaoke Party App
 * This file contains common styles used across all pages
 */

/* Import design tokens first */
@import url('./tokens.css');

/* Import animations */
@import url('./animations.css');

/* CSS Variables for consistent theming */
:root {
  /* Colors */
  --primary-color: #ff4757;
  --primary-hover: #ff3838;
  --secondary-color: #4CAF50;
  --secondary-hover: #45a049;
  --danger-color: #f44336;
  --danger-hover: #da190b;
  --warning-color: #ffa726;
  --info-color: #2196f3;
  
  /* Text Colors */
  --text-primary: #333;
  --text-secondary: #666;
  --text-light: #fff;
  
  /* Background Colors */
  --bg-primary: #f5f7fa;
  --bg-secondary: #fff;
  --bg-dark: #2c3e50;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  
  /* Borders */
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

/* Base Typography */
body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-top: 0;
}

/* Common Button Styles */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-light);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--text-light);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--secondary-hover);
}

.btn-danger {
  background-color: var(--danger-color);
  color: var(--text-light);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

/* Common Card Styles */
.card {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

/* Common Form Styles */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm);
  font-size: var(--font-size-base);
  border: 1px solid #ddd;
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Loading States */
.loading {
  display: inline-block;
  text-align: center;
  color: var(--text-secondary);
  padding: var(--spacing-lg);
}

.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0,0,0,0.1);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s linear infinite;
}

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

/* Notifications */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  color: var(--text-light);
  z-index: 1000;
  animation: slideIn 0.3s ease;
}

.notification.success {
  background-color: var(--secondary-color);
}

.notification.error {
  background-color: var(--danger-color);
}

.notification.warning {
  background-color: var(--warning-color);
}

.notification.info {
  background-color: var(--info-color);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }

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

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

/* Connection Indicator */
.connection-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.1);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.connection-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transition: all var(--transition-base);
}

.connection-dot.connected {
  background-color: #4CAF50;
  box-shadow: 0 0 4px #4CAF50;
  animation: pulse 2s infinite;
}

.connection-dot.disconnected {
  background-color: #f44336;
  box-shadow: 0 0 4px #f44336;
  animation: pulse-error 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes pulse-error {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

.connection-text {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.9);
}

/* Offline Notification */
.offline-notification {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: var(--warning-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: transform var(--transition-base);
}

.offline-notification.show {
  transform: translateX(-50%) translateY(0);
}

.offline-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.offline-icon {
  font-size: 20px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  :root {
    --font-size-base: 14px;
    --spacing-md: 12px;
    --spacing-lg: 20px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .notification {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  .connection-indicator {
    font-size: 11px;
    padding: 2px 6px;
  }
  
  .connection-text {
    display: none;
  }
  
  .offline-notification {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    transform: translateX(0) translateY(-100px);
  }
  
  .offline-notification.show {
    transform: translateX(0) translateY(0);
  }
}