/**
 * Topic MCQ practice – question cards, options, test navigation bar, pagination, empty state
 */
/* ==================== QUESTION CARDS ==================== */
.question-card {
    background: var(--color-white);
    border-radius: 10px;
    padding: var(--space-6);
    margin-bottom: var(--space-5);
    border: 1px solid var(--color-neutral-border-light);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-smooth);
}

.question-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card-hover);
}

.question-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.question-number {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

.question-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-neutral-text);
    line-height: 1.6;
    flex: 1;
}

.question-meta {
    display: flex;
    align-items: center;
    gap: var(--space-7);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.difficulty-badge {
    padding: var(--space-1) var(--space-7);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.difficulty-badge.easy {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

.difficulty-badge.medium {
    background: rgba(255, 193, 7, 0.1);
    color: #ffc107;
}

.difficulty-badge.hard {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.marks-badge {
    background: var(--color-neutral-bg-light);
    color: var(--color-neutral-muted);
    padding: var(--space-1) var(--space-7);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.marks-badge i {
    color: var(--color-primary);
    font-size: 10px;
}

.hint-btn {
    background: transparent;
    border: 1px solid #ffc107;
    color: #ffc107;
    padding: var(--space-1) var(--space-7);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.hint-btn:hover {
    background: #ffc107;
    color: var(--color-white);
}

.hint-section {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    border-radius: 5px;
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    display: none;
}

.hint-section.show {
    display: block;
}

.hint-section i {
    color: #ffc107;
    margin-right: var(--space-2);
}

.hint-section p {
    color: #856404;
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Options */
.options-container {
    margin: var(--space-4) 0;
}

.option-item {
    display: flex;
    align-items: center;
    padding: var(--space-7) var(--space-4);
    border: 1px solid var(--color-neutral-border);
    border-radius: 8px;
    margin-bottom: var(--space-2);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.option-item:hover {
    background: var(--color-neutral-bg-light);
    border-color: var(--color-primary);
}

.option-item.selected {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.option-letter {
    width: 28px;
    height: 28px;
    background: var(--color-neutral-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    margin-right: var(--space-7);
    color: var(--color-neutral-text);
    flex-shrink: 0;
}

.option-item.selected .option-letter {
    background: var(--color-primary);
    color: var(--color-white);
}

.option-text {
    font-size: var(--font-size-base);
    color: var(--color-neutral-text);
    flex: 1;
}

/* ==================== TEST NAVIGATION ==================== */
.test-navigation {
    background: var(--color-white);
    border-radius: 10px;
    padding: var(--space-5);
    margin-top: var(--space-5);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-neutral-border-light);
    position: static;
    bottom: 20px;
    z-index: 100;
}

.progress-indicator {
    height: 6px;
    background: var(--color-neutral-bg-light);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 3px;
    transition: width var(--transition-smooth);
}

.navigation-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    color: var(--color-neutral-muted);
    font-size: var(--font-size-sm);
}

.navigation-info strong {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.clear-btn {
    background: transparent;
    border: 1px solid var(--color-neutral-border);
    color: var(--color-neutral-muted);
    padding: var(--space-2) var(--space-4);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.clear-btn:hover {
    background: var(--color-neutral-bg-light);
    border-color: var(--color-neutral-muted);
    color: var(--color-neutral-text);
}

.pagination-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-7);
    margin-bottom: var(--space-4);
}

.pagination-buttons .btn {
    padding: var(--space-2) var(--space-5);
    border-radius: 8px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.pagination-buttons .btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    border: none;
}

.pagination-buttons .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-buttons .btn-outline-secondary {
    background: transparent;
    border: 1px solid var(--color-neutral-border);
    color: var(--color-neutral-muted);
}

.pagination-buttons .btn-outline-secondary:hover {
    background: var(--color-neutral-bg-light);
    border-color: var(--color-neutral-border);
    color: var(--color-neutral-text);
}

.pagination-buttons .btn-success {
    background: #28a745;
    color: var(--color-white);
    border: none;
}

.pagination-buttons .btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==================== PAGINATION ==================== */
.pagination-wrapper {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-neutral-border-light);
}

.pagination {
    margin: 0;
    justify-content: center;
}

.pagination .page-link {
    border: 1px solid var(--color-neutral-border);
    color: var(--color-neutral-muted);
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-7);
    transition: all var(--transition-fast);
}

.pagination .page-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

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

/* ==================== EMPTY STATES ==================== */
.empty-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.empty-state i {
    font-size: var(--font-size-4xl);
    color: var(--color-neutral-muted-light);
    margin-bottom: var(--space-4);
}

.empty-state h5 {
    color: var(--color-neutral-muted);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-2);
}

.empty-state p {
    color: var(--color-neutral-muted-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}