/**
 * Custom CSS E-Learning Kopdit Mekar Sai
 * Author: GitHub Copilot
 * Created: 19 September 2025
 */

:root {
    --primary-color: #0066cc;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

/* General Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
}

.main-content {
    min-height: calc(100vh - 200px);
}

/* Navigation Styles */
.navbar-brand {
    font-size: 1.4rem;
}

.user-info {
    text-align: left;
    line-height: 1.2;
}

.user-avatar {
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Card Styles */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(45deg, var(--primary-color), #0052a3);
    color: white;
    border-radius: 10px 10px 0 0 !important;
    border: none;
}

/* Button Styles */
.btn {
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #0052a3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #0052a3, var(--primary-color));
    transform: translateY(-1px);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* Dashboard Stats Cards */
.stats-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.stats-card.success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stats-card.warning {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.stats-card.danger {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: #333;
}

.stats-icon {
    font-size: 2.5rem;
    opacity: 0.8;
}

/* Table Styles */
.table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    border: none;
    font-weight: 600;
}

.table tbody tr:hover {
    background-color: rgba(0, 102, 204, 0.05);
}

/* Form Styles */
.form-control, .form-select {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    transition: border-color 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

.form-label {
    font-weight: 600;
    color: #333;
}

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Dashboard Styles */
.dashboard-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0052a3 100%);
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-radius: 0 0 20px 20px;
}

.welcome-text {
    font-size: 1.5rem;
    font-weight: 300;
}

.user-role {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-block;
    margin-top: 0.5rem;
}

/* Material Card Styles */
.material-card {
    border: none;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.material-thumbnail {
    height: 200px;
    background: linear-gradient(45deg, #f093fb 0%, #f5576c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.material-type {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 15px;
    font-size: 0.75rem;
}

/* Progress Bar Styles */
.progress {
    height: 8px;
    border-radius: 10px;
    background-color: #e9ecef;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), #00c6ff);
    border-radius: 10px;
}

/* Badge Styles */
.badge {
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
}

/* Modal Styles */
.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background: linear-gradient(45deg, var(--primary-color), #0052a3);
    color: white;
    border-radius: 15px 15px 0 0;
}

/* File Upload Styles */
.file-upload-area {
    border: 2px dashed #ddd;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.3s ease;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 102, 204, 0.05);
}

.file-upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(0, 102, 204, 0.1);
}

/* Breadcrumb Styles */
.breadcrumb {
    background: white;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Alert Styles */
.alert {
    border-radius: 10px;
    border: none;
    font-weight: 500;
}

/* Sidebar Styles (untuk admin/tutor) */
.sidebar {
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    min-height: 100vh;
    color: white;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 0.25rem;
    transition: all 0.3s ease;
}

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

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

/* Quiz Styles */
.quiz-question {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.quiz-option {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quiz-option:hover {
    border-color: var(--primary-color);
    background-color: rgba(0, 102, 204, 0.05);
}

.quiz-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(0, 102, 204, 0.1);
}

/* Certificate Styles */
.certificate-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .dashboard-header {
        padding: 1rem 0;
    }
    
    .welcome-text {
        font-size: 1.25rem;
    }
    
    .stats-card {
        margin-bottom: 1rem;
    }
    
    .material-thumbnail {
        height: 150px;
        font-size: 2rem;
    }
}

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

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

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

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

::-webkit-scrollbar-thumb:hover {
    background: #0052a3;
}