/* Filter Styles */

.filter-container {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid #dee2e6;
}

[data-theme="dark"] .filter-container {
    background: linear-gradient(135deg, #343a40, #495057);
    border-color: #6c757d;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.filter-title {
    color: #495057;
    font-weight: 600;
    margin-bottom: 1rem;
}

[data-theme="dark"] .filter-title {
    color: #ffffff;
}

/* Filter Groups */
.filter-group {
    margin-bottom: 1rem;
}

.filter-group-label {
    display: block;
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

[data-theme="dark"] .filter-group-label {
    color: #adb5bd;
}

/* Filter Buttons */
.filter-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: #ffffff;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    color: #6c757d;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    user-select: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.filter-btn:hover {
    border-color: #007bff;
    color: #007bff;
    background: #f8f9ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.15);
}

.filter-btn.active {
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-color: #007bff;
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.filter-btn.active:hover {
    background: linear-gradient(135deg, #0056b3, #004085);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.filter-btn i {
    font-size: 0.9rem;
}

/* Dark theme filter buttons */
[data-theme="dark"] .filter-btn {
    background: #343a40;
    border-color: #495057;
    color: #adb5bd;
}

[data-theme="dark"] .filter-btn:hover {
    border-color: #007bff;
    color: #66b3ff;
    background: #1a2332;
}

[data-theme="dark"] .filter-btn.active {
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-color: #007bff;
    color: white;
}

/* Filter container animations */
.filter-container {
    animation: slideDown 0.3s ease-out;
    overflow: hidden;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        max-height: 500px;
        transform: translateY(0);
    }
}

/* Filter header */
.filter-header {
    border-bottom: 1px solid #dee2e6;
    padding-bottom: 0.75rem;
}

[data-theme="dark"] .filter-header {
    border-bottom-color: #495057;
}

.filter-title {
    color: #495057;
    font-weight: 600;
    font-size: 1.1rem;
}

[data-theme="dark"] .filter-title {
    color: #ffffff;
}

/* Filter actions */
.filter-actions {
    border-top: 1px solid #dee2e6;
    padding-top: 1rem;
}

[data-theme="dark"] .filter-actions {
    border-top-color: #495057;
}

.filter-count {
    font-size: 0.9rem;
}

/* Toggle button animations */
.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Active filter indicator */
.filter-btn.active {
    position: relative;
}

.filter-btn.active::before {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 12px;
    height: 12px;
    background: #28a745;
    border-radius: 50%;
    border: 2px solid #ffffff;
    animation: pulse 2s infinite;
}

[data-theme="dark"] .filter-btn.active::before {
    border-color: #343a40;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.filter-container .form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

[data-theme="dark"] .filter-container .form-label {
    color: #ffffff;
}

.filter-container .form-select {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background-color: #ffffff;
    color: #495057;
}

.filter-container .form-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.filter-container .form-select:hover {
    border-color: #007bff;
}

[data-theme="dark"] .filter-container .form-select {
    background-color: #343a40;
    border-color: #6c757d;
    color: #ffffff;
}

[data-theme="dark"] .filter-container .form-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

[data-theme="dark"] .filter-container .form-select option {
    background-color: #343a40;
    color: #ffffff;
}

/* Responsive design for filters */
@media (max-width: 768px) {
    .filter-container {
        padding: 1rem;
    }
    
    .filter-container .form-select {
        font-size: 0.9rem;
        padding: 0.6rem 0.8rem;
    }
}

@media (max-width: 576px) {
    .filter-container {
        padding: 0.75rem;
    }
    
    .filter-container .row > div {
        margin-bottom: 1rem;
    }
    
    .filter-container .row > div:last-child {
        margin-bottom: 0;
    }
}

/* Show answers mode styling */
.show-answers-mode .answer-option.correct-answer {
    border-color: #28a745 !important;
    background-color: #d4edda !important;
    color: #155724 !important;
}

.show-answers-mode .answer-option.correct-answer .answer-key {
    background: linear-gradient(135deg, #28a745, #1e7e34) !important;
    color: white !important;
}

[data-theme="dark"] .show-answers-mode .answer-option.correct-answer {
    border-color: #28a745 !important;
    background-color: #1e3a25 !important;
    color: #75d487 !important;
}

/* Filter status indicator */
.filter-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 123, 255, 0.1);
    color: #007bff;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

[data-theme="dark"] .filter-status {
    background: rgba(0, 123, 255, 0.2);
    color: #66b3ff;
}

.filter-status-icon {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
}