/* Modern Dark/Light Theme CSS */

:root {
    /* Light Theme Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    /* Light Theme Variables */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --card-bg: #ffffff;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    
    /* Spacing & Sizing */
    --border-radius: 15px;
    --border-radius-lg: 20px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --card-bg: #1e293b;
    --navbar-bg: rgba(15, 23, 42, 0.95);
}

/* Base Styles */
body {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    transition: all var(--transition-normal);
    line-height: 1.6;
}

/* Modern Cards */
.modern-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.modern-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px var(--shadow-color);
}

/* Gradient Headers */
.gradient-header {
    background: var(--primary-gradient);
    border: none;
    color: white;
    padding: var(--spacing-md);
}

/* Modern Inputs */
.modern-input {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    transition: all var(--transition-normal);
    font-size: 1rem;
}

.modern-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Gradient Buttons */
.btn-gradient {
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-gradient:hover::before {
    left: 100%;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

/* Modern Alerts */
.modern-alert {
    border: none;
    border-radius: var(--border-radius);
    border-left: 4px solid;
    background: var(--card-bg);
    color: var(--text-primary);
    padding: var(--spacing-md);
    box-shadow: 0 2px 10px var(--shadow-color);
}

/* Navigation */
.navbar {
    background: var(--navbar-bg) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.navbar-brand {
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    color: var(--text-primary) !important;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    margin: 0 0.25rem;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

/* Dashboard Cards */
.dashboard-card {
    border: none;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.dashboard-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.dashboard-card:hover::before {
    opacity: 1;
}

.dashboard-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

/* Product Cards */
.product-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-normal);
    overflow: hidden;
    position: relative;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 1;
}

.product-card:hover::before {
    opacity: 0.05;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-color);
    border-color: transparent;
}

.product-card .card-body {
    position: relative;
    z-index: 2;
}

/* Price Tags */
.price-tag {
    background: var(--primary-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    display: inline-block;
}

/* Status Badges */
.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Form Enhancements */
.form-floating > label {
    color: var(--text-muted);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    color: #667eea;
}

/* Tables */
.table {
    background: var(--card-bg);
    color: var(--text-primary);
}

.table th {
    border-color: var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table td {
    border-color: var(--border-color);
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background: var(--bg-tertiary);
}

/* Modals */
.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--shadow-color);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* Pagination */
.pagination .page-link {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--border-radius);
    margin: 0 0.25rem;
    transition: all var(--transition-normal);
}

.pagination .page-link:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.pagination .page-item.active .page-link {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
}

/* Dropdowns */
.dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.dropdown-item {
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

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

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a67d8, #667eea);
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--primary-gradient);
    color: white;
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* Loading States */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .modern-card {
        margin-bottom: var(--spacing-md);
    }
    
    .dashboard-card:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .product-card:hover {
        transform: translateY(-5px);
    }
    
    .btn-gradient {
        padding: 0.625rem 1.25rem;
    }
}

/* Dark Mode Specific Adjustments */
[data-theme="dark"] .table-hover tbody tr:hover {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .navbar-toggler {
    border-color: var(--border-color);
}

[data-theme="dark"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28241, 245, 249, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Utility Classes */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .glass-effect {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-5px);
}

/* Enhanced Focus States */
.modern-input:focus,
.form-control:focus,
.form-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

/* Custom Checkbox and Radio */
.form-check-input:checked {
    background-color: #667eea;
    border-color: #667eea;
}

.form-check-input:focus {
    border-color: #667eea;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}
</style>