.oqd-container {
    max-width: 900px;
    margin: 30px auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, sans-serif;
}

.oqd-subject-title {
    font-size: 28px;
    color: #333;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #0073aa;
}

.oqd-subject-count {
    font-weight: 600;
    opacity: 0.85;
}

.oqd-questions-wrapper {
    margin-bottom: 30px;
}

.oqd-question-item {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.oqd-question-number {
    font-size: 14px;
    font-weight: 600;
    color: #0073aa;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.oqd-question-text {
    font-size: 18px;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.6;
    font-weight: 500;
}

.oqd-options {
    margin: 20px 0;
}

.oqd-option {
    padding: 15px 18px;
    margin-bottom: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    background: #fafafa;
}

.oqd-option:hover {
    border-color: #0073aa;
    background: #f0f8ff;
    transform: translateX(5px);
}

.oqd-option-label {
    font-weight: 700;
    color: #0073aa;
    margin-right: 12px;
    min-width: 25px;
    font-size: 16px;
}

.oqd-option-text {
    color: #555;
    font-size: 16px;
    line-height: 1.5;
}

.oqd-option.correct {
    background: #d4edda;
    border-color: #28a745;
    color: #155724;
    pointer-events: none;
}

.oqd-option.correct .oqd-option-label {
    color: #155724;
}

.oqd-option.incorrect {
    background: #f8d7da;
    border-color: #dc3545;
    color: #721c24;
    pointer-events: none;
}

.oqd-option.incorrect .oqd-option-label {
    color: #721c24;
}

.oqd-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

.oqd-hint-button {
    background: #fff3cd;
    border: 2px solid #ffc107;
    color: #856404;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 15px;
}

.oqd-hint-button:hover {
    background: #ffc107;
    color: #fff;
}

.oqd-hint-box {
    margin-top: 15px;
    padding: 18px;
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    border-radius: 5px;
    animation: slideDown 0.3s ease;
}

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

.oqd-hint-content {
    color: #856404;
    font-size: 15px;
    line-height: 1.6;
}

.oqd-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.oqd-page-btn {
    padding: 12px 24px;
    background: #0073aa;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.oqd-page-btn:hover:not(:disabled) {
    background: #005a87;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.oqd-page-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    opacity: 0.6;
}

.oqd-page-info {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.oqd-current-page {
    color: #0073aa;
    font-size: 18px;
}