/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   THEME SYSTEM - CSS Variables Based
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

:root {
    /* Dark Mode Colors (Default) */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-overlay: rgba(15, 23, 42, 0.95);
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --text-inverse: #0f172a;
    
    --accent-primary: #3b82f6;
    --accent-primary-hover: #2563eb;
    --accent-secondary: #8b5cf6;
    --accent-secondary-hover: #7c3aed;
    
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    
    --border-color: #334155;
    --border-light: #475569;
    --border-focus: #3b82f6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #06b6d4;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Light Mode Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --bg-overlay: rgba(248, 250, 252, 0.95);
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;
    
    --accent-primary: #2563eb;
    --accent-primary-hover: #1d4ed8;
    --accent-secondary: #7c3aed;
    --accent-secondary-hover: #6d28d9;
    
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    --gradient-secondary: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
    --gradient-accent: linear-gradient(135deg, #0891b2 0%, #2563eb 100%);
    
    --border-color: #e2e8f0;
    --border-light: #cbd5e1;
    --border-focus: #2563eb;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Theme Transition */
* {
    transition: background-color var(--transition-base), 
                color var(--transition-base), 
                border-color var(--transition-base),
                box-shadow var(--transition-base);
}

/* Respect User Preferences */
@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bg-primary: #f8fafc;
        --bg-secondary: #ffffff;
        --bg-tertiary: #e2e8f0;
        --bg-overlay: rgba(248, 250, 252, 0.95);
        
        --text-primary: #0f172a;
        --text-secondary: #334155;
        --text-tertiary: #64748b;
        --text-inverse: #ffffff;
        
        --accent-primary: #2563eb;
        --accent-primary-hover: #1d4ed8;
        --accent-secondary: #7c3aed;
        --accent-secondary-hover: #6d28d9;
        
        --gradient-primary: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
        --gradient-secondary: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
        --gradient-accent: linear-gradient(135deg, #0891b2 0%, #2563eb 100%);
        
        --border-color: #e2e8f0;
        --border-light: #cbd5e1;
        --border-focus: #2563eb;
        
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    }
}

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

/* Theme Toggle Button Styles */
.theme-toggle {
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    padding: 0 4px;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.theme-toggle-slider {
    width: 22px;
    height: 22px;
    background: var(--gradient-primary);
    border-radius: 50%;
    transition: transform var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    box-shadow: var(--shadow-md);
}

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

/* Print Styles */
@media print {
    .theme-toggle,
    .cookie-banner,
    .modal {
        display: none !important;
    }
}