/* Light Theme (Default) */
.light-theme {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --primary-color-20: rgba(59, 130, 246, 0.2);
    
    --secondary-color: #f8fafc;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --info-color: #3b82f6;
    
    --bg-color: #ffffff;
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    
    --header-bg: #ffffff;
    --header-text: #1f2937;
    --nav-bg: #f8fafc;
    
    --card-bg: #ffffff;
    --modal-bg: #ffffff;
    --input-bg: #ffffff;
    --button-bg: #ffffff;
    
    --border-color: #e5e7eb;
    --hover-bg: #f3f4f6;
    
    --comment-bg: #f9fafb;
    --upload-bg: #f0f9ff;
    --file-bg: #ffffff;
    --activity-bg: #f0f9ff;
    
    --table-header-bg: #f9fafb;
    
    --info-bg: #dbeafe;
    --info-text: #1e40af;
    --info-border: #93c5fd;
    
    --success-bg: #d1fae5;
    --success-text: #065f46;
    --success-border: #6ee7b7;
    
    --warning-bg: #fef3c7;
    --warning-text: #92400e;
    --warning-border: #fcd34d;
    
    --danger-bg: #fee2e2;
    --danger-text: #991b1b;
    --danger-border: #fca5a5;
    
    --priority-low-bg: #e3f2fd;
    --priority-low-text: #1976d2;
    --priority-medium-bg: #fff3e0;
    --priority-medium-text: #f57c00;
    --priority-high-bg: #fce4ec;
    --priority-high-text: #c2185b;
    --priority-urgent-bg: #ffebee;
    --priority-urgent-text: #d32f2f;
    
    --status-new-bg: #f3e5f5;
    --status-new-text: #7b1fa2;
    --status-progress-bg: #e8f5e8;
    --status-progress-text: #2e7d32;
    --status-completed-bg: #e3f2fd;
    --status-completed-text: #1976d2;
    --status-overdue-bg: #ffebee;
    --status-overdue-text: #d32f2f;
    
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-heavy: rgba(0, 0, 0, 0.25);
}

/* Dark Theme */
.dark-theme {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-color-20: rgba(96, 165, 250, 0.2);
    
    --secondary-color: #374151;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --danger-hover: #ef4444;
    --info-color: #60a5fa;
    
    --bg-color: #111827;
    --text-color: #f9fafb;
    --text-secondary: #9ca3af;
    
    --header-bg: #1f2937;
    --header-text: #f9fafb;
    --nav-bg: #1f2937;
    
    --card-bg: #1f2937;
    --modal-bg: #1f2937;
    --input-bg: #374151;
    --button-bg: #374151;
    
    --border-color: #374151;
    --hover-bg: #374151;
    
    --comment-bg: #374151;
    --upload-bg: #1e3a8a;
    --file-bg: #1f2937;
    --activity-bg: #1e3a8a;
    
    --table-header-bg: #374151;
    
    --info-bg: #1e3a8a;
    --info-text: #93c5fd;
    --info-border: #3b82f6;
    
    --success-bg: #064e3b;
    --success-text: #6ee7b7;
    --success-border: #10b981;
    
    --warning-bg: #78350f;
    --warning-text: #fcd34d;
    --warning-border: #f59e0b;
    
    --danger-bg: #7f1d1d;
    --danger-text: #fca5a5;
    --danger-border: #ef4444;
    
    --priority-low-bg: rgba(59, 130, 246, 0.2);
    --priority-low-text: #93c5fd;
    --priority-medium-bg: rgba(245, 124, 0, 0.2);
    --priority-medium-text: #fbbf24;
    --priority-high-bg: rgba(194, 24, 91, 0.2);
    --priority-high-text: #f472b6;
    --priority-urgent-bg: rgba(211, 47, 47, 0.2);
    --priority-urgent-text: #f87171;
    
    --status-new-bg: rgba(123, 31, 162, 0.2);
    --status-new-text: #c084fc;
    --status-progress-bg: rgba(46, 125, 50, 0.2);
    --status-progress-text: #4ade80;
    --status-completed-bg: rgba(25, 118, 210, 0.2);
    --status-completed-text: #60a5fa;
    --status-overdue-bg: rgba(211, 47, 47, 0.2);
    --status-overdue-text: #f87171;
    
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-heavy: rgba(0, 0, 0, 0.6);
}

/* Theme Transition */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Scrollbar styling */
.dark-theme ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.dark-theme ::-webkit-scrollbar-track {
    background: var(--bg-color);
}

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

.dark-theme ::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Light theme scrollbar */
.light-theme ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.light-theme ::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.light-theme ::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.light-theme ::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Selection colors */
.dark-theme ::selection {
    background: var(--primary-color);
    color: white;
}

.light-theme ::selection {
    background: var(--primary-color);
    color: white;
}

/* Animation improvements for theme switching */
@media (prefers-reduced-motion: no-preference) {
    .theme-toggle {
        transition: transform 0.3s ease, background-color 0.3s ease;
    }
    
    .theme-toggle:hover {
        transform: rotate(15deg);
    }
    
    .dark-theme .theme-toggle:hover {
        transform: rotate(-15deg);
    }
}

/* High contrast improvements */
@media (prefers-contrast: high) {
    .dark-theme {
        --border-color: #ffffff;
        --text-color: #ffffff;
        --bg-color: #000000;
        --card-bg: #000000;
    }
    
    .light-theme {
        --border-color: #000000;
        --text-color: #000000;
        --bg-color: #ffffff;
        --card-bg: #ffffff;
    }
}

/* Theme-specific print styles */
@media print {
    .dark-theme {
        --bg-color: #ffffff;
        --text-color: #000000;
        --card-bg: #ffffff;
        --border-color: #000000;
    }
    
    .theme-toggle,
    .logout-btn,
    .modal {
        display: none !important;
    }
}