body {
    background: rgb(255, 255, 255);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: Arial;
}

.calculadora {
    width: 220px;
}

#display {
    width: 100%;
    height: 50px;
    margin-bottom: 10px;
    font-size: 20px;
    text-align: right;
    padding: 5px;
}

.botoes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

button {
    height: 40px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.igual {
    grid-column: span 2;
    background: rgb(68, 68, 68);
}