/**
 * Unified Theme System for AdaptiveLearn
 * This file provides a consistent theming system across the entire application
 * using CSS custom properties (variables) for easy theme switching
 */

/* Base Theme Variables - Default to Modern Glass */
:root,
body,
body.style-modern-glass {
    /* Primary Colors */
    --primary-gradient-start: #4facfe;
    --primary-gradient-end: #00f2fe;
    --primary-gradient: linear-gradient(135deg, var(--primary-gradient-start) 0%, var(--primary-gradient-end) 100%);
    --primary-color: #4facfe;
    --primary-hover: #00d4ff;
    
    /* Secondary Colors */
    --secondary-gradient-start: #667eea;
    --secondary-gradient-end: #764ba2;
    --secondary-gradient: linear-gradient(135deg, var(--secondary-gradient-start) 0%, var(--secondary-gradient-end) 100%);
    
    /* Background Colors */
    --bg-primary: #030303;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111827;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-hover: rgba(255, 255, 255, 0.05);
    
    /* Text Colors */
    --text-primary: #f3f4f6;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --text-muted: #6b7280;
    --text-inverse: #1e293b;
    
    /* Border Colors */
    --border-primary: #1f2937;
    --border-secondary: rgba(255, 255, 255, 0.1);
    --border-hover: #667eea;
    
    /* Status Colors */
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --warning: #fb923c;
    --warning-bg: rgba(251, 146, 60, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --info: #6366f1;
    --info-bg: rgba(99, 102, 241, 0.1);
    
    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: 15px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.25);
    
    /* Layout Variables */
    --sidebar-width: 280px;
    --ai-sidebar-width: 320px;
    --header-height: 60px;
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-xxl: 20px;
    
    /* Animation */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
}

/* Theme: Classic Clean */
body.style-classic-clean {
    --primary-gradient-start: #2563eb;
    --primary-gradient-end: #3b82f6;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-hover: #f8fafc;
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --border-hover: #3b82f6;
    
    --glass-bg: #ffffff;
    --glass-border: #e2e8f0;
    --glass-blur: 0px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* Theme: Vibrant Energy */
body.style-vibrant-energy {
    --primary-gradient-start: #f72585;
    --primary-gradient-end: #b5179e;
    --primary-color: #f72585;
    --primary-hover: #e00d74;
    
    --secondary-gradient-start: #7209b7;
    --secondary-gradient-end: #560bad;
    
    --bg-primary: #0a0114;
    --bg-secondary: #190233;
    --bg-tertiary: #240046;
    --bg-card: rgba(114, 9, 183, 0.1);
    --bg-hover: rgba(114, 9, 183, 0.2);
    
    --glass-bg: rgba(247, 37, 133, 0.1);
    --glass-border: rgba(247, 37, 133, 0.3);
    --glass-blur: 20px;
}

/* Theme: Minimal Focus */
body.style-minimal-focus {
    --primary-gradient-start: #000000;
    --primary-gradient-end: #434343;
    --primary-gradient: linear-gradient(135deg, #000000 0%, #434343 100%);
    --primary-color: #1a1a1a;
    --primary-hover: #2a2a2a;
    
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #1a1a1a;
    --bg-card: #0f0f0f;
    --bg-hover: #1f1f1f;
    
    --border-primary: #2a2a2a;
    --border-secondary: #3a3a3a;
    --border-hover: #ffffff;
    
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-blur: 10px;
}

/* Base Styles Using CSS Variables */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Ensure dashboard layouts use theme colors */
.dashboard-layout,
.command-center {
    background: var(--bg-primary) !important;
}

.left-sidebar,
.ai-sidebar {
    background: var(--bg-secondary) !important;
    border-color: var(--border-primary) !important;
}

.section,
.stat-card,
.activity-item,
.chart-container {
    background: var(--bg-tertiary) !important;
    border-color: var(--border-primary) !important;
}

/* Glass Effect Mixin */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}

/* Card Component */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-base);
}

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

/* Button Component */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
    font-size: var(--text-sm);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
}

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

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

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

/* Section Component */
.section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* Dashboard Layout */
.dashboard-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--ai-sidebar-width);
    height: 100vh;
    gap: 0;
    background: var(--bg-primary);
}

/* Sidebar Styles */
.left-sidebar,
.ai-sidebar {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
    padding: 2rem 1.5rem;
    overflow-y: auto;
}

.left-sidebar {
    border-right: 1px solid var(--border-primary);
}

.ai-sidebar {
    border-left: 1px solid var(--border-primary);
}

/* Navigation Items */
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary-gradient);
    color: white;
}

/* Stat Cards */
.stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-md);
    padding: 1.25rem;
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Form Elements */
input,
textarea,
select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    font-size: var(--text-sm);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--border-hover);
    box-shadow: 0 0 0 3px var(--info-bg);
}

/* Status Colors */
.status-success {
    color: var(--success);
    background: var(--success-bg);
}

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

.status-error {
    color: var(--error);
    background: var(--error-bg);
}

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

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-secondary);
}

/* Utility Classes */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted { color: var(--text-muted); }

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-tertiary { background: var(--bg-tertiary); }

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

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Responsive Design */
@media (max-width: 1024px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }
    
    .left-sidebar,
    .ai-sidebar {
        display: none;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn var(--transition-slow) ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-in-right {
    animation: slideInRight var(--transition-slow) ease-out;
}

@keyframes slideInRight {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

/* Override inline styles for consistency */
.style-modern-glass .glass-effect,
.style-vibrant-energy .glass-effect {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(var(--glass-blur)) !important;
    -webkit-backdrop-filter: blur(var(--glass-blur)) !important;
    border: 1px solid var(--glass-border) !important;
}

.style-classic-clean .glass-effect,
.style-minimal-focus .glass-effect {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}