body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
}

.cbt-container {
    max-width: 1200px;
    margin: 20px auto;
    background: #fff;
    border: 1px solid #ddd;
}

.cbt-header {
    background: #1e293b;
    color: #fff;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cbt-body {
    display: flex;
}

.question-area {
    width: 70%;
    padding: 25px;
    border-right: 1px solid #ddd;
}

.question-area h4 {
    margin-bottom: 10px;
}

.option {
    display: block;
    padding: 10px;
    margin-bottom: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
}

.option:hover {
    background: #f1f5f9;
}

.actions {
    margin-top: 20px;
}

.actions button {
    padding: 8px 15px;
    margin-right: 10px;
    background: #2563eb;
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 4px;
}

.palette {
    width: 30%;
    padding: 20px;
    background: #f8fafc;
}

.palette h4 {
    margin-bottom: 10px;
}

.palette-btn {
    width: 40px;
    height: 40px;
    margin: 5px;
    border: 1px solid #555;
    background: #fff;
    cursor: pointer;
}

.palette-btn.answered {
    background: #22c55e;
    color: #fff;
}

.submit-btn {
    margin-top: 15px;
    width: 100%;
    padding: 10px;
    background: #dc2626;
    color: #fff;
    border: none;
    cursor: pointer;
}