/* CourseCorrect Admin Dashboard Styles */

:root {
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 70px;
    --primary-color: #2563eb;
    --secondary-color: #1d4ed8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --light-color: #f8fafc;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f8fafc;
    margin: 0;
    padding: 0;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: linear-gradient(135deg, var(--dark-color), #111827);
    color: white;
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.sidebar.collapsed .sidebar-header h4 {
    display: none;
}

.sidebar.collapsed .sidebar-header small {
    display: none;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.sidebar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.75rem 1.5rem;
    border-radius: 0;
    transition: var(--transition);
    display: flex;
    align-items: center;
    font-weight: 500;
}

.sidebar-nav .nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.sidebar-nav .nav-link.active {
    color: white;
    background: var(--primary-color);
    border-left: 4px solid var(--accent-color);
}

.sidebar-nav .nav-link i {
    width: 20px;
    margin-right: 0.75rem;
    text-align: center;
}

.sidebar.collapsed .sidebar-nav .nav-link {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .sidebar-nav .nav-link span {
    display: none;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar.collapsed .sidebar-footer .btn {
    padding: 0.5rem;
    font-size: 0.8rem;
}

.sidebar.collapsed .sidebar-footer .btn span {
    display: none;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    min-height: 100vh;
}

.sidebar.collapsed + .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* Top Bar */
.navbar {
    background: white !important;
    border-bottom: 1px solid #e5e7eb;
    padding: 1rem;
}

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.content-section.active {
    display: block;
}

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

/* Stats Cards */
.stats-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.stats-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.stats-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-right: 1rem;
}

.stats-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    color: var(--dark-color);
}

.stats-content p {
    margin: 0;
    color: #6b7280;
    font-weight: 500;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: white;
    border-bottom: 1px solid #e5e7eb;
    padding: 1rem 1.5rem;
    font-weight: 600;
}

/* Tables */
.table {
    margin: 0;
}

.table th {
    background: var(--light-color);
    border: none;
    font-weight: 600;
    color: var(--dark-color);
    padding: 1rem;
}

.table td {
    padding: 1rem;
    border-color: #e5e7eb;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background: rgba(37, 99, 235, 0.05);
}

/* Status Badges */
.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.status-active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-inactive {
    background: rgba(107, 114, 128, 0.1);
    color: #6b7280;
}

.status-pending {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.status-completed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-failed {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: var(--transition);
    border: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #2563eb);
    color: white;
}

.btn-outline-secondary {
    border: 2px solid #e5e7eb;
    color: #6b7280;
}

.btn-outline-secondary:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
    color: var(--dark-color);
}

/* Forms */
.form-control,
.form-select {
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: calc(var(--border-radius) * 1.5);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.modal-header {
    background: var(--primary-color);
    color: white;
    border-bottom: none;
    border-radius: calc(var(--border-radius) * 1.5) calc(var(--border-radius) * 1.5) 0 0;
}

.modal-title {
    font-weight: 600;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    border-top: 1px solid #e5e7eb;
    padding: 1rem 2rem;
}

/* Charts */
canvas {
    max-width: 100%;
    height: auto;
}

/* Loading States */
.spinner-border {
    width: 2rem;
    height: 2rem;
    border-width: 0.25em;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 1rem 1.5rem;
}

.alert-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.alert-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
}

.alert-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: white;
}

.alert-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        width: var(--sidebar-collapsed-width);
    }
    
    .sidebar-header h4,
    .sidebar-header small {
        display: none;
    }
    
    .sidebar-nav .nav-link {
        justify-content: center;
        padding: 0.75rem;
    }
    
    .sidebar-nav .nav-link span {
        display: none;
    }
    
    .main-content {
        margin-left: var(--sidebar-collapsed-width);
    }
    
    .stats-card {
        flex-direction: column;
        text-align: center;
    }
    
    .stats-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    .modal-footer {
        padding: 0.75rem 1.5rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding: 0.75rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .modal-dialog {
        margin: 0.5rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .table {
        font-size: 0.8rem;
    }
    
    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .form-control,
    .form-select {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --dark-color: #f9fafb;
        --light-color: #1f2937;
    }
    
    body {
        background: #111827;
        color: #f9fafb;
    }
    
    .card {
        background: #1f2937;
        color: #f9fafb;
    }
    
    .table th {
        background: #374151;
        color: #f9fafb;
    }
    
    .form-control,
    .form-select {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
    
    .form-control:focus,
    .form-select:focus {
        background: #374151;
        border-color: var(--primary-color);
    }
}

/* Animation utilities */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

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

/* Utility classes */
.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important; }
.bg-success { background: linear-gradient(135deg, var(--success-color), #059669) !important; }
.bg-warning { background: linear-gradient(135deg, var(--warning-color), #d97706) !important; }
.bg-danger { background: linear-gradient(135deg, var(--danger-color), #dc2626) !important; }
.bg-info { background: linear-gradient(135deg, var(--info-color), #2563eb) !important; }

.border-primary { border-color: var(--primary-color) !important; }
.border-success { border-color: var(--success-color) !important; }
.border-warning { border-color: var(--warning-color) !important; }
.border-danger { border-color: var(--danger-color) !important; }
.border-info { border-color: var(--info-color) !important; }

.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05) !important; }
.shadow { box-shadow: var(--box-shadow) !important; }
.shadow-lg { box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15) !important; }

.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: calc(var(--border-radius) * 1.5) !important; }

.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }

.lh-sm { line-height: 1.25 !important; }
.lh-base { line-height: 1.5 !important; }
.lh-lg { line-height: 1.75 !important; }