style.css

body {
    background-image: url(images/bg.jpg);
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    /* margin: 0; */
    overflow: hidden;
}

#position {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

#calci {

    margin-left: 5px;
    white-space: nowrap;
    background-color: rgb(86, 86, 86);
    padding: 5px 10px 10px 5px;
    border: solid 3px;
    border-radius: 20px;
}

input {
    height: 40px;
    width: 170px;
    vertical-align: middle;
    text-align: right;
    font-size: large;
    margin-top: 5px;
    margin-left: 5px;
    border: black solid 2px;
    border-radius: 10px;
    padding-right: 10px;
}

button {
    width: 40px;
    height: 40px;
    border-radius: 17px;
    margin-top: 5px;
    margin-left: 5px;
    background-color: rgb(182, 182, 182);
}

button:not(.num) {
    background-color: rgb(255, 160, 58);
}

button:hover {
    cursor: pointer;
    opacity: 0.6;
}

button:active {
    opacity: 0.3;
}

#credit {
    position: relative;
    bottom: 70px;
    float: inline-end;
    text-align: right;
    color: azure;
    font-family: cursive;
}