/* AH Private Batch LMS - Theme System */
/* Dark Mode: Dark Blue Theme | Light Mode: Beautiful Colors */
/* Mobile-First Responsive Design */

/* ===== LIGHT THEME (DEFAULT) ===== */
:root {
  /* AH Private Batch Light Theme Colors */
  --primary-color: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  
  --secondary-color: #059669;
  --secondary-light: #10b981;
  --secondary-dark: #047857;
  --secondary-50: #ecfdf5;
  --secondary-100: #d1fae5;
  --secondary-200: #a7f3d0;
  
  --accent-color: #dc2626;
  --accent-light: #ef4444;
  --accent-dark: #b91c1c;
  --accent-50: #fef2f2;
  --accent-100: #fee2e2;
  --accent-200: #fecaca;
  
  --gold-color: #f59e0b;
  --gold-light: #fbbf24;
  --gold-dark: #d97706;
  --gold-50: #fffbeb;
  --gold-100: #fef3c7;
  --gold-200: #fde68a;
  
  /* Light Theme Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #f8fafc;
  --bg-active: #e2e8f0;
  --bg-overlay: rgba(15, 23, 42, 0.5);
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Light Theme Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-inverse: #ffffff;
  --text-on-primary: #ffffff;
  --text-on-secondary: #ffffff;
  
  /* Light Theme Borders */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #cbd5e1;
  --border-focus: var(--primary-color);
  
  /* Light Theme Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  
  /* Glass Effects */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --hover-bg: rgba(0, 0, 0, 0.05);
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  --gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Navigation */
  --nav-height: 60px;
  
  /* Theme identifier */
  --theme-mode: 'light';
}

/* ===== DARK THEME (Dark Blue) ===== */
[data-theme="dark"] {
  /* AH Private Batch Dark Blue Theme */
  --primary-color: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #2563eb;
  --primary-50: #1e3a8a;
  --primary-100: #1e40af;
  --primary-200: #1d4ed8;
  
  --secondary-color: #10b981;
  --secondary-light: #34d399;
  --secondary-dark: #059669;
  --secondary-50: #064e3b;
  --secondary-100: #065f46;
  --secondary-200: #047857;
  
  --accent-color: #f87171;
  --accent-light: #fca5a5;
  --accent-dark: #ef4444;
  --accent-50: #7f1d1d;
  --accent-100: #991b1b;
  --accent-200: #b91c1c;
  
  --gold-color: #fbbf24;
  --gold-light: #fcd34d;
  --gold-dark: #f59e0b;
  --gold-50: #78350f;
  --gold-100: #92400e;
  --gold-200: #b45309;
  
  /* Dark Blue Theme Backgrounds */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --bg-active: #475569;
  --bg-overlay: rgba(0, 0, 0, 0.7);
  --bg-gradient: linear-gradient(135deg, #1e3a8a 0%, #1e293b 100%);
  
  /* Dark Theme Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --text-inverse: #0f172a;
  --text-on-primary: #ffffff;
  --text-on-secondary: #ffffff;
  
  /* Dark Theme Borders */
  --border-color: #475569;
  --border-light: #334155;
  --border-dark: #64748b;
  --border-focus: var(--primary-color);
  
  /* Dark Theme Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  
  /* Glass Effects */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --hover-bg: rgba(255, 255, 255, 0.1);
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  --gradient-bg: linear-gradient(135deg, #1e3a8a 0%, #1e293b 100%);
  
  /* Navigation */
  --nav-height: 60px;
  
  /* Theme identifier */
  --theme-mode: 'dark';
}

/* ===== AUTO THEME (System Preference) ===== */
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    /* Inherit dark theme variables */
    --primary-color: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --primary-50: #1e3a8a;
    --primary-100: #1e40af;
    --primary-200: #1d4ed8;
    
    --secondary-color: #10b981;
    --secondary-light: #34d399;
    --secondary-dark: #059669;
    --secondary-50: #064e3b;
    --secondary-100: #065f46;
    --secondary-200: #047857;
    
    --accent-color: #f87171;
    --accent-light: #fca5a5;
    --accent-dark: #ef4444;
    --accent-50: #7f1d1d;
    --accent-100: #991b1b;
    --accent-200: #b91c1c;
    
    --gold-color: #fbbf24;
    --gold-light: #fcd34d;
    --gold-dark: #f59e0b;
    --gold-50: #78350f;
    --gold-100: #92400e;
    --gold-200: #b45309;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --bg-active: #475569;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    --bg-gradient: linear-gradient(135deg, #1e3a8a 0%, #1e293b 100%);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    --text-inverse: #0f172a;
    --text-on-primary: #ffffff;
    --text-on-secondary: #ffffff;
    
    --border-color: #475569;
    --border-light: #334155;
    --border-dark: #64748b;
    --border-focus: var(--primary-color);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    
    --theme-mode: 'auto-dark';
  }
}

/* ===== THEME TRANSITION ===== */
* {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ===== THEME COMPONENTS ===== */

/* Theme Toggle Button */
.theme-toggle {
  position: relative;
  width: 60px;
  height: 32px;
  background: var(--border-color);
  border-radius: 16px;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px;
}

.theme-toggle:hover {
  background: var(--border-dark);
}

.theme-toggle-slider {
  position: absolute;
  width: 24px;
  height: 24px;
  background: var(--bg-primary);
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

[data-theme="dark"] .theme-toggle-slider {
  transform: translateX(28px);
}

.theme-toggle-icon {
  font-size: 14px;
  color: var(--text-muted);
}

/* Cards with theme support */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Buttons with theme support */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  font-family: var(--font-family-bengali);
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--text-on-primary);
}

/* Form elements with theme support */
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--text-base);
  font-family: var(--font-family-bengali);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* Navigation with theme support */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
}

/* ===== MOBILE RESPONSIVE THEME ===== */
@media (max-width: 768px) {
  .theme-toggle {
    width: 50px;
    height: 28px;
    border-radius: 14px;
  }
  
  .theme-toggle-slider {
    width: 20px;
    height: 20px;
  }
  
  [data-theme="dark"] .theme-toggle-slider {
    transform: translateX(22px);
  }
  
  .card {
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: var(--text-sm);
  }
  
  .form-input {
    padding: 0.625rem 0.875rem;
    font-size: var(--text-sm);
  }
}

/* ===== THEME UTILITIES ===== */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-card { background-color: var(--bg-card); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

.border-color { border-color: var(--border-color); }
.border-light { border-color: var(--border-light); }
.border-dark { border-color: var(--border-dark); }

/* Theme-aware scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-dark);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Theme-aware selection */
::selection {
  background: var(--primary-200);
  color: var(--text-primary);
}

[data-theme="dark"] ::selection {
  background: var(--primary-100);
  color: var(--text-primary);
}

/* Print styles for both themes */
@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
  }
}

/* 🌙☀️ Theme system loaded with Dark Blue & Beautiful Light themes */