body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #f2f2f2;
}

.screen {
    text-align: center;
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.hide {
    display: none;
}

button {
    padding: 12px;
    background: black;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 6px;
    font-size: 16px;
}

button:hover {
    opacity: 0.8;
}

#optioncontainer {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.optionbtn {
    padding: 12px;
    background: white;
    border: 2px solid black;
    cursor: pointer;
    border-radius: 6px;
    color: black;      
    font-weight: bold;
    font-size: 15px;
}

.correct {
    background: lightgreen !important;
}

.wrong {
    background: salmon !important;
}

#feedback {
    font-size: 18px;
    font-weight: bold;
}

.hidden {
    display: none;
}