* {
    box-sizing: border-box;
}
body {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    min-height: 100vh;
    background-color: #161622;
}
button {
    background-color:#808080;
    color: white;
    font-size: 19px;
    padding: 1rem;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    transition: .5s;
}
button:hover{
    background: white;
    color: #161622;
}
#container {
    position: fixed;
    bottom: 10px;
    right: 10px;
}
.test {
    background-color: #F20A15;
    border-radius: 5px;
    color: white;
    padding: 15px;
    margin: 10px;
    width: 100px;
}