.quiz-card {
    animation: slideUp 0.5s ease-out;
}

.quiz-option {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.quiz-option::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-blue) 0%, var(--color-primary-orange) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quiz-option:hover::before {
    opacity: 1;
}

.quiz-option:hover {
    transform: translateX(4px);
}

.progress-bar {
    transition: width 0.5s ease-out;
}

.quiz-question {
    animation: fadeIn 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

input[type="checkbox"] {
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 0.25rem;
    border: 2px solid var(--color-primary-blue);
    appearance: none;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

input[type="checkbox"]:checked {
    background-color: var(--color-primary-blue);
}

input[type="checkbox"]:checked::after {
    content: '✓';
    color: white;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.8rem;
}

.gradient-border {
    position: relative;
    background: white;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    bottom: -2px;
    left: -2px;
    background: linear-gradient(135deg, var(--color-primary-blue) 0%, var(--color-primary-orange) 100%);
    border-radius: 1rem;
    z-index: -1;
    opacity: 0.1;
}