body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    padding: 10px;
    box-sizing: border-box;
    text-align: center;
}

h1 {
    margin-bottom: 20px;
    font-size: 1.5em;
}

div {
    margin-bottom: 10px;
}

#bit-buttons,
#quiz {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
}

.bit-button,
.answer-button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    flex: 1 1 calc(50% - 20px);
    max-width: 200px;
}

.bit-button.selected,
.answer-button.selected {
    background-color: #4CAF50;
    color: white;
}

#result {
    margin-top: 20px;
    font-weight: bold;
}

@media (max-width: 600px) {

    .bit-button,
    .answer-button {
        font-size: 14px;
        padding: 8px 16px;
    }

    h1 {
        font-size: 1.2em;
    }
}