/* Modern Design System - White Team */
:root {
    /* Light Mode Variables */
    --bg-body: #f3f4f6;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --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);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-base: all 0.2s ease-in-out;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --bg-body: #111827;
    --bg-card: #1f2937;
    --bg-sidebar: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* Base Reset & Typography */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition-base);
}

a:hover {
    color: var(--primary-hover);
}

/* Utilities */
.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .glass-effect {
    background: rgba(31, 41, 55, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    font-size: 0.875rem;
}

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

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

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

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    filter: brightness(90%);
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    filter: brightness(90%);
}

/* Inputs */
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Layout - Login */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--bg-body) 0%, var(--border-color) 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 2.5rem;
    background-color: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* Layout - Dashboard */
.dashboard-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 50;
    transition: transform 0.3s ease;
    left: 0;
    top: 0;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    background-color: var(--bg-body);
    width: calc(100% - 280px);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 40;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
    opacity: 1;
}

/* Sidebar Menu */
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    margin: 0.25rem 1rem;
    transition: var(--transition-base);
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.nav-link i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-toggle {
    display: none;
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-base);
}

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

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-primary);
}

.table th {
    background-color: var(--bg-body);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem;
    text-align: left;
}

.table td {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.table tr:hover {
    background-color: rgba(0,0,0,0.02);
}

[data-theme="dark"] .table tr:hover {
    background-color: rgba(255,255,255,0.02);
}

/* Badges */
.badge {
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.badge-success { background-color: rgba(16, 185, 129, 0.1); color: var(--success-color); }
.badge-warning { background-color: rgba(245, 158, 11, 0.1); color: var(--warning-color); }
.badge-danger { background-color: rgba(239, 68, 68, 0.1); color: var(--danger-color); }
.badge-primary { background-color: rgba(37, 99, 235, 0.1); color: var(--primary-color); }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.2);
}

.alert-error, .alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-color: rgba(245, 158, 11, 0.2);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-dialog {
    width: 100%;
    max-width: 500px;
    margin: 1.5rem;
    transform: translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-dialog {
    transform: translateY(0);
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: var(--transition-base);
}

.btn-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Pagination */
.pagination-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.page-size-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.page-size-selector select {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.empty-state h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 1rem;
    }

    .mobile-menu-toggle {
        display: inline-flex;
        margin-right: 1rem;
    }
    
    .header h2 {
        font-size: 1.25rem;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
}