body{
    display: flex;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: #f0f0f0;
}

.calculator{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1{
    align-items: center;
    color: green;
    display: flex;
    margin-top: 10px;
}

.display{
    grid-column: span 4;
    height: 60px;
    width: 320px;
    text-align: right;
    padding: 0 20px;
    border: none;
    outline: none;
    font-size: 50px;
    background: rgb(96, 96, 96);
    border-radius: 10px;
}

button{
    height: 60px;
    font-size: 24px;
    border-radius: 5px;
    cursor: pointer;
    padding-top: 10px;
    width: 80px;
}

button:hover{
    background-color: #eee;
}

.number{
    flex-direction: row;
    display: flex;
    height: 40px;
    padding: 15px;
    gap: 10px;
}