body {
    font-family: Arial;
    background: #1e1e1e;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.calculator {
    background: #2c2c2c;
    padding: 20px;
    border-radius: 12px;
    width: 260px;
}

#display {
    width: 100%;
    height: 50px;
    font-size: 22px;
    text-align: right;
    padding: 10px;
    margin-bottom: 15px;
    border: none;
    border-radius: 8px;
    box-sizing: border-box;

    /* 🔥 FIX */
    overflow-x: auto;
    white-space: nowrap;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.buttons button {
    width: 55px;
    height: 45px;
    margin: 5px;
    font-size: 18px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #555;
    color: white;
}