*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(#252930 50%, #5372f0 50%);
}

::selection{
    color: #fff;
    background: #5372f0;
}

button{
    border: none;
    outline: none;
    font-size: 50px;
    padding: 23px 44px;
    border-radius: 10px;
    cursor: pointer;
    background: #fff;
    box-shadow: 0 0 20px 0 rgba(0 ,0 ,0 ,0.1);
}