body {
    background-color: #f5f5f5;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.container {
    max-width: 800px;
}

h1 {
    color: #333;
    font-weight: 600;
}

.card {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: none;
    border-radius: 8px;
}

.insignia-img {
    max-width: 300px;
    max-height: 200px;
    object-fit: contain;
    border: 1px solid #dee2e6;
    padding: 15px;
    background-color: white;
    border-radius: 4px;
}

.answer-btn {
    padding: 15px;
    font-size: 1.1rem;
    text-align: left;
}

.answer-btn:disabled {
    cursor: not-allowed;
}

.btn-correct {
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    color: white !important;
}

.btn-incorrect {
    background-color: #dc3545 !important;
    border-color: #dc3545 !important;
    color: white !important;
}

.feedback {
    animation: slideIn 0.3s ease-out;
}

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

.error-item {
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 15px;
    background-color: #fff;
}

.error-insignia {
    max-width: 150px;
    max-height: 100px;
    object-fit: contain;
    border: 1px solid #dee2e6;
    padding: 10px;
    background-color: #f8f9fa;
    border-radius: 4px;
}

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

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

.form-check-input:checked {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.form-check-label {
    font-size: 1.1rem;
    cursor: pointer;
}

#score-percentage {
    font-size: 1.2rem;
}

.alert {
    border-radius: 4px;
}

footer .card {
    background-color: #f8f9fa;
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

footer h6 {
    color: #495057;
    font-weight: 600;
}

footer p {
    font-size: 0.9rem;
    line-height: 1.6;
}

footer a {
    color: #0d6efd;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}