body{
    text-align: center;
    margin:0;
    background: #a57279;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

#calculator {
    max-width: 360px;
    background-color: #0d1b2a;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 10px 20px rgba(0, 0,0, 0.19);
}

#display {
    width: 100%;
    height: 56px;
    font-size: 20px;
    text-align: right;
    margin-bottom: 10px;
    padding: 20px;
    border-radius: 5px;
    color: #e0e1dd;
    background-color: rgba(66, 122, 182, 0.3);
    border: none;
    box-sizing: border-box;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 20px;
}

button {
    height: 50px;
    font-size: 20px;
    border: none;
    border-radius: 5px;
    background-color: rgb(13, 27, 42);
    color: #e0e1dd;
    cursor: pointer;
    box-shadow: -1px -1px 30px -5px rgba(0, 0, 0, 0.2);
}

.operator {
    color: #219ebc;
}

#ac {
    color: #bf4d5d;
}

.equal {
    grid-column: span 2;
}