body {
    width: 100%;
    height: 100vh;
    scrollbar-width: none;
    font-family: Arial, sans-serif;
    background-image: linear-gradient(#571ffff5, #05337d);
    background-repeat: no-repeat;
}

h1 {
    text-align: center;
    margin-top: 30px;
    color: chartreuse;
}

h2 {
    text-align: center;
    margin-top: 10px;
    color: aquamarine;
}

.calculadora {
    width: 315px;
    margin: 0 auto;
    background-color: #161616fc;
    padding: 50px;
    border-radius: 50px;
    box-shadow: 0 2px 5px rgba(#320aacf5);
}

#pantalla {
    width: 90%;
    padding: 10px;
    font-size: 20px;
    margin-bottom: 10px;
    text-align: right;
    background-color: #cbc9c9;
}

input[type="button"] {
    width: 70px;
    height: 40px;
    margin-right: 5px;
    margin-bottom: 5px;
    font-size: 16px;
    background-color: #eeeeeede;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

input[type="button"]:hover {
    background-color: #bdffd8c5;
}

input[type="button"]:last-child {
    margin-right: 0;
}