/* Component CSS for ARU Academy */

/* Course Detail Page Styling */
.course-detail-section {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.course-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2.5rem;
    border-radius: 20px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.course-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    pointer-events: none;
}

.course-info {
    position: relative;
    z-index: 1;
}

.breadcrumb {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.breadcrumb a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.breadcrumb a:hover {
    opacity: 0.8;
}

.course-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.course-header p {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.meta-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.9rem;
}

.course-actions {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.course-actions .btn:not(.btn-primary):not(.btn-secondary):not(.btn-outline) {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.course-actions .btn:not(.btn-primary):not(.btn-secondary):not(.btn-outline):hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.course-progress {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.05);
}

.progress-overview h3 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 0.8s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.progress-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: #667eea;
}

.progress-details {
    color: #666;
    font-size: 0.9rem;
}

.course-content {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid rgba(0,0,0,0.05);
    overflow: hidden;
}

.content-tabs {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.tab-button {
    flex: 1;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tab-button:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.tab-button.active {
    background: white;
    color: #667eea;
    font-weight: 600;
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.tab-content {
    padding: 2rem;
    min-height: 400px;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.resource-card {
    background: white;
    border: 2px solid #f0f0f0;
    border-radius: 15px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.resource-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.15);
}

.resource-card:hover::before {
    transform: scaleX(1);
}

.resource-type-badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.resource-type-badge.pdf {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
}

.resource-type-badge.text {
    background: linear-gradient(135deg, #4ecdc4, #44a08d);
    color: white;
}

.resource-type-badge.video {
    background: linear-gradient(135deg, #ff9a9e, #fecfef);
    color: #333;
}

.resource-type-badge.document {
    background: linear-gradient(135deg, #a8edea, #fed6e3);
    color: #333;
}

.resource-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.resource-description {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.resource-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.resource-actions .btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.resource-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: #666;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

.empty-state p {
    margin-bottom: 1.5rem;
}

/* Responsive Design for Course Detail */
@media (max-width: 768px) {
    .course-header {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .course-header h1 {
        font-size: 2rem;
    }
    
    .course-meta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .course-actions .btn {
        width: 100%;
        text-align: center;
    }
    
    .resource-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .content-tabs {
        flex-direction: column;
    }
    
    .tab-button {
        text-align: center;
    }
    
    .progress-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* Modern Cards */
.modern-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    overflow: hidden;
}

.modern-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.stat-card.modern-card {
    padding: 1.5rem;
    position: relative;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.stat-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.stat-trend {
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.stat-trend.positive {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.stat-trend.neutral {
    background: rgba(107, 114, 128, 0.1);
    color: #6b7280;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    line-height: 1;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-description {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0;
}

/* Enhanced Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 2rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    color: white;
    padding: 2rem;
    margin: 0 -1rem 2rem -1rem;
}

.welcome-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
}

.welcome-section .highlight {
    color: #fbbf24;
}

.subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0;
}

.quick-actions {
    display: flex;
    gap: 1rem;
}

.quick-actions .btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    backdrop-filter: blur(10px);
}

.quick-actions .btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Card Headers */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    margin-bottom: 1rem;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: #6b7280;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

/* Enhanced Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Course Cards */
.course-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    overflow: hidden;
    position: relative;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.course-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.course-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
}

.course-content {
    padding: 1.5rem;
}

.course-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.course-description {
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0 0 1rem 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: #6b7280;
}

.course-department {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
}

.course-progress {
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.875rem;
    color: #6b7280;
    text-align: right;
}

.course-actions {
    display: flex;
    gap: 0.75rem;
}

.course-actions .btn {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
}

/* Enhanced Search and Filters */
.filters-section {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.search-box {
    position: relative;
    margin-bottom: 1rem;
}

.search-box input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-btn {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.25rem;
    color: #6b7280;
    cursor: pointer;
}

.filter-options {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-options select {
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.875rem;
    background: white;
    min-width: 150px;
    transition: all 0.3s ease;
}

.filter-options select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* Profile Page */
.profile-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    color: white;
    padding: 2rem;
    margin: 0 -1rem 2rem -1rem;
    text-align: center;
}

.profile-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
}

.profile-header p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0;
}

.profile-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    align-items: start;
}

.profile-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    padding: 2rem;
    text-align: center;
    position: sticky;
    top: 2rem;
}

.profile-avatar {
    margin-bottom: 1.5rem;
}

.avatar-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    margin: 0 auto;
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.3);
}

.profile-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
}

.profile-email {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0 0 0.5rem 0;
}

.profile-role {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.875rem;
    display: inline-block;
    margin: 0 0 0.5rem 0;
}

.profile-department {
    color: #6b7280;
    font-size: 0.875rem;
    margin: 0 0 1.5rem 0;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    border-top: 1px solid #e5e7eb;
    padding-top: 1.5rem;
}

.profile-stats .stat-item {
    text-align: center;
}

.profile-stats .stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    display: block;
    margin-bottom: 0.25rem;
}

.profile-stats .stat-label {
    font-size: 0.75rem;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Profile Navigation */
.profile-nav {
    display: flex;
    background: white;
    border-radius: 12px;
    padding: 0.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: #6b7280;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.nav-btn:hover:not(.active) {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

/* Profile Tabs */
.profile-tab {
    display: none;
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.profile-tab.active {
    display: block;
}

.tab-header {
    margin-bottom: 2rem;
}

.tab-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
}

.tab-header p {
    color: #6b7280;
    margin: 0;
}

/* Form Groups */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Activity Items */
.activity-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    background: #f9fafb;
    transition: all 0.3s ease;
}

.activity-item:hover {
    background: #f3f4f6;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-right: 1rem;
    font-size: 1.25rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 500;
    color: #1f2937;
    margin: 0 0 0.25rem 0;
}

.activity-time {
    font-size: 0.875rem;
    color: #6b7280;
    margin: 0;
}

/* AI Tutor Chat Interface */
.ai-tutor-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    color: white;
    padding: 2rem;
    margin: 0 -1rem 2rem -1rem;
    text-align: center;
}

.ai-tutor-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
}

.ai-tutor-header p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0;
}

.ai-tutor-nav {
    display: flex;
    background: white;
    border-radius: 12px;
    padding: 0.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-btn {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.nav-btn:hover {
    background: #f8fafc;
    color: #374151;
    transform: translateY(-1px);
}

.nav-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

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

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

.ai-chat-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
    height: 600px;
    display: flex;
    flex-direction: column;
}

.chat-header {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.chat-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
}

.chat-header p {
    color: #6b7280;
    margin: 0;
    font-size: 0.875rem;
}

.chat-messages {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    gap: 0.75rem;
    max-width: 80%;
}

.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.ai-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.user-message .message-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.ai-message .message-avatar {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.message-content {
    background: #f9fafb;
    padding: 1rem 1.25rem;
    border-radius: 18px;
    position: relative;
}

.user-message .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.ai-message .message-content {
    background: #f9fafb;
    color: #1f2937;
}

.message-content p {
    margin: 0;
    line-height: 1.5;
}

.message-time {
    font-size: 0.75rem;
    color: #9ca3af;
    margin-top: 0.5rem;
    text-align: right;
}

.user-message .message-time {
    color: rgba(255, 255, 255, 0.7);
}

.chat-input-container {
    padding: 1.5rem;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
}

.chat-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.input-group input {
    flex: 1;
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 25px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-group button {
    padding: 1rem 1.5rem;
    border-radius: 25px;
    font-weight: 500;
    min-width: 100px;
}

.input-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #667eea;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    font-style: italic;
}

.typing-dots {
    display: flex;
    gap: 0.25rem;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #6b7280;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Quick Questions */
.quick-questions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.quick-question {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    color: #6b7280;
}

.quick-question:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
    color: #667eea;
    transform: translateY(-2px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #666;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.link {
    color: #667eea;
    text-decoration: underline;
}

.link:hover {
    color: #5a6fd8;
}

/* Authentication */
.auth-section {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.auth-container {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    color: #333;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: #666;
    font-size: 1.1rem;
}

.auth-form {
    margin-bottom: 2rem;
}

.auth-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid #e1e5e9;
}

.auth-footer p {
    color: #666;
    margin: 0;
}

.btn-full {
    width: 100%;
    margin-top: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input.error {
    border-color: #e74c3c;
}

.form-error {
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.form-select:focus {
    outline: none;
    border-color: #667eea;
}

.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    min-height: 120px;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.form-textarea:focus {
    outline: none;
    border-color: #667eea;
}

/* Cards */
.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e1e5e9;
    background: #f8f9fa;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e1e5e9;
    background: #f8f9fa;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left-color: #28a745;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left-color: #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-left-color: #ffc107;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left-color: #17a2b8;
}

/* Popup Alert Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { 
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: #667eea;
    color: white;
}

.badge-success {
    background: #28a745;
    color: white;
}

.badge-warning {
    background: #ffc107;
    color: #212529;
}

.badge-danger {
    background: #dc3545;
    color: white;
}

.badge-info {
    background: #17a2b8;
    color: white;
}

/* Progress Bars */
.progress {
    width: 100%;
    height: 8px;
    background: #e1e5e9;
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e1e5e9;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

.table tr:hover {
    background: #f8f9fa;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin: 2rem 0;
}

.pagination-item {
    padding: 0.5rem 1rem;
    border: 1px solid #e1e5e9;
    border-radius: 6px;
    color: #667eea;
    text-decoration: none;
    transition: all 0.3s ease;
}

.pagination-item:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination-item.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.spinner-large {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

/* Modal */
.modal, .modal-overlay {
    visibility: hidden;
    opacity: 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.active, .modal.show {
    visibility: visible;
    opacity: 1;
}

.modal-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e1e5e9;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: #333;
}

.modal-body {
    margin-bottom: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e1e5e9;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-text {
    font-size: 0.875rem;
    color: #666;
    margin-top: 0.25rem;
}

/* Tooltips */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: white;
    text-align: center;
    border-radius: 6px;
    padding: 0.5rem;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.875rem;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* Responsive Components */
@media (max-width: 768px) {
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .btn-large {
        padding: 0.8rem 1.6rem;
        font-size: 1rem;
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .table {
        font-size: 0.9rem;
    }
    
    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .modal-content {
        padding: 1rem;
        margin: 0.5rem;
    }
    
    .auth-container {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }
    
    .auth-section {
        padding: 100px 0 60px;
    }
}

/* About Page Styles */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    text-align: left;
    line-height: 1.8;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: #555;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
    font-size: 1.1rem;
}

.contact-item i {
    color: #667eea;
    font-size: 1.2rem;
}

/* Navigation Active State */
.nav-list li a.active,
.nav-link.active {
    color: #ffd700;
    font-weight: 600;
}

/* Responsive About Page */
@media (max-width: 768px) {
    .contact-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    .about-text {
        text-align: center;
    }
}

/* Quiz Generator Styles */
.quiz-generator-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.generator-header {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 2rem;
    border-bottom: 1px solid #e5e7eb;
    text-align: center;
}

.generator-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
}

.generator-header p {
    color: #6b7280;
    margin: 0;
    font-size: 1rem;
}

.generator-form {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.generator-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.generator-form label {
    font-weight: 500;
    color: #374151;
    font-size: 0.95rem;
}

.generator-form input,
.generator-form select {
    padding: 1rem 1.25rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.generator-form input:focus,
.generator-form select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-full {
    width: 100%;
    padding: 1.25rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.btn-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.generated-quiz {
    background: #f8fafc;
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
    border: 2px solid #e5e7eb;
}

.generated-quiz h4 {
    color: #1f2937;
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quiz-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.quiz-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* Question History Styles */
.history-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.history-header {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0;
}

.history-filters {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.history-filters select {
    padding: 0.5rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 0.9rem;
    background: white;
}

.history-list {
    padding: 2rem;
    max-height: 500px;
    overflow-y: auto;
}

.history-item {
    background: #f9fafb;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.history-item:hover {
    background: #f3f4f6;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.history-question {
    font-weight: 500;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
    line-height: 1.5;
}

.history-answer {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0 0 1rem 0;
}

.history-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #9ca3af;
}

.history-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: #6b7280;
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h4 {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0 0 0.5rem 0;
    color: #374151;
}

.empty-state p {
    margin: 0;
    font-size: 0.9rem;
}

/* Loading States */
.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: #6b7280;
    font-size: 0.9rem;
}

.loading-spinner::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid #e5e7eb;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

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

/* Interactive Quiz Styles */
.quiz-instructions {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.quiz-instructions h4 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.quiz-instructions p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    opacity: 0.9;
}

.quiz-timer {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
    color: #495057;
}

.quiz-question {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.quiz-question:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.quiz-question.answered {
    border-color: #667eea;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.quiz-question h5 {
    color: #495057;
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.quiz-question p {
    color: #6c757d;
    margin: 0 0 1.5rem 0;
    line-height: 1.6;
}

.question-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.option-label {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.option-label:hover {
    background: #e9ecef;
    border-color: #dee2e6;
}

.option-label input[type="radio"] {
    margin-right: 0.75rem;
    transform: scale(1.2);
    accent-color: #667eea;
}

.option-label input[type="radio"]:checked + .option-text {
    font-weight: 600;
    color: #667eea;
}

.option-label:has(input[type="radio"]:checked) {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-color: #667eea;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.option-text {
    flex: 1;
    color: #495057;
    transition: all 0.3s ease;
}

.question-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    background: #f8f9fa;
    border-left: 4px solid #6c757d;
}

.feedback-correct {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #28a745;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feedback-incorrect {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #dc3545;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feedback-icon {
    font-size: 1.2rem;
}

.explanation-text {
    color: #6c757d;
    font-size: 0.9rem;
    line-height: 1.5;
}

.quiz-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 2rem 0;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 12px;
}

.quiz-actions .btn {
    min-width: 120px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
}

.quiz-results {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 16px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.results-header h4 {
    text-align: center;
    color: #495057;
    margin: 0 0 2rem 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.results-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.score-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.score-circle {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    font-size: 3rem;
    font-weight: 700;
    color: #667eea;
}

.score-number {
    font-size: 4rem;
}

.score-total {
    font-size: 2rem;
    color: #6c757d;
}

.score-percentage {
    font-size: 1.5rem;
    font-weight: 600;
    color: #28a745;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-radius: 20px;
}

.score-breakdown {
    display: flex;
    gap: 2rem;
    text-align: center;
}

.correct-answers,
.incorrect-answers {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
}

.correct-answers {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
}

.incorrect-answers {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    color: #721c24;
}

.correct-count,
.incorrect-count {
    font-size: 1.5rem;
    font-weight: 700;
}

.performance-message {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: #495057;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

/* Short Answer Question Styles */
.short-answer-container {
    margin: 1rem 0;
}

.short-answer-input {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.5;
    resize: vertical;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.short-answer-input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.short-answer-input:disabled {
    background: #e9ecef;
    color: #6c757d;
    cursor: not-allowed;
}

.answer-hint {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: #6c757d;
    font-style: italic;
}

.feedback-suggestions {
    margin-top: 0.75rem;
}

.suggestions-text {
    color: #495057;
    font-size: 0.9rem;
    line-height: 1.5;
    padding: 0.75rem;
    background: #e3f2fd;
    border-radius: 6px;
    border-left: 3px solid #2196f3;
}

/* Enhanced feedback styles for short answers */
.question-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    background: #f8f9fa;
    border-left: 4px solid #6c757d;
}

.feedback-correct .feedback-text {
    color: #28a745;
    font-weight: 600;
}

.feedback-incorrect .feedback-text {
    color: #dc3545;
    font-weight: 600;
}

/* Loading state for evaluation */
.evaluating {
    opacity: 0.7;
    pointer-events: none;
}

.evaluating::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Responsive Design for Quiz */
@media (max-width: 768px) {
    .quiz-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .score-breakdown {
        flex-direction: column;
        gap: 1rem;
    }
    
    .score-circle {
        font-size: 2.5rem;
    }
    
    .score-number {
        font-size: 3rem;
    }
    
    .score-total {
        font-size: 1.5rem;
    }
    
    .short-answer-input {
        min-height: 100px;
        font-size: 0.9rem;
    }
}