body {
    display: flex;
    background-color: black;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.calculator {
    position: relative;
    background-color: #000235;
    padding: 25px;
    border-radius: 10px;
    z-index: 4;
}

.screen {
    position: relative;
    width: 306px;
    height: 94px;
    background-color: royalblue;
    font-size: 30px;
    text-align: end;
    padding: 4px;
    margin-left: 152px;
    margin-bottom: 6px;
    border-radius: 4px;
    z-index: 4;
    box-shadow: 0 0 20px rgba(74, 28, 0.15);
    text-align: right;
}

#clear {
    position: relative;
    top: 100px;
    left: 35px;
    background-color: slategray;
}

#clear:active {
    background-color: red;
}

.buttons {
    width: 500px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
}

button {
    background-color: rgba(255, 255, 255);
    border: none;
    font-size: 50px;
    height: 100px;
    width: 100px;
    margin: 4px;
    top: auto;
    border-radius: 10px;
}

button:hover {
    background-color: deepskyblue;
}

button:active {
    background-color: white;
}

#equals {
    background-color: slategray;
}

#equals:active {
    background-color: red;
}

#content {
    position: relative;
    text-align: center;
    left: 0;
    right: 0;
    top: 35px;
    bottom: 0;
    margin: auto;
    color: red;
}