body {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    height: 100vh;
    align-content: center;
    font-family: 'Open Sans', sans-serif;
    background-image: linear-gradient( 175.9deg,  rgba(70,80,98,1) 7%, rgba(90,104,127,1) 93.8% );
}
.container {
    display: flex;
    align-content: center;
    justify-content: center;
}
table {
    margin: auto;max-width: 100%;
}
input#screen {
    font-size: 30px;
    outline: none;
    border: none;
    box-shadow: -1px 2px 15px -4px rgb(0 0 0 / 18%);
    margin-bottom: 10px;
    width: 327px;
    height: 76px;
    border-radius: 5px;
    margin-top: 10px;
    background: #a1bd66;
    padding-right: 14px;
    text-align: right;
}
button {
    width: 80px;
    height: 78px;
    font-size: 27px;
    border: none;
    margin: 2px;
    border-radius: 6px;
    background: #bcbcbc;
}
button:hover {
    background: #dadada;
    transition: background 0.2s ease-out;
}
.calculator {
    text-align: center;
    padding: 11px;
    max-width: 354px;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to bottom right, #363636, #383838);
    box-shadow: -2px 9px 15px -4px rgb(0 0 0 / 55%);
    border-top-left-radius: 22px;
    border-top-right-radius: 0px;
    border-bottom-right-radius: 22px;
    border-bottom-left-radius: 0px;
}
button:active {
    position: relative;
    top: 3px;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, .4);
}