#container {
    background: linear-gradient(orange, red);
    width: 500px;
    height: 400px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%) translateY(-50%);
    box-shadow: 5px 5px 4px rgb(83, 83, 83);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

#container input {
    border-radius: 5px;
    background-color: bisque;
    border: none;
    padding: 10px;
    box-shadow: inset 4px 4px rgb(78, 78, 78);
}

#result {
    position: absolute;
    bottom: 80px;
}