.progress-bar {
    transition: width 0.3s ease;
}

.quiz-card {
    transition: all 0.3s ease;
}

.radio-button {
    position: relative;
    padding-left: 35px;
    cursor: pointer;
    user-select: none;
}

.radio-button input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 24px;
    width: 24px;
    border: 2px solid #cbd5e1;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.radio-button:hover input~.checkmark {
    border-color: #94a3b8;
}

.radio-button input:checked~.checkmark {
    background-color: white;
    border-color: #2563eb;
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.radio-button input:checked~.checkmark:after {
    display: block;
}

.radio-button .checkmark:after {
    top: 4px;
    left: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #2563eb;
}

.result-bar {
    transition: width 1s ease;
}