@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@500&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: Reggae One;
font-family: Noto Sans JP;
}
body
{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: black;
}
header
{
    display: block;
    text-align: center;
    justify-content: center;
    background: #f2a;
    box-shadow: 0px 1px 17px rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    height: 320px;
    width: 190px;
    color: aliceblue;
}
header h1 
{
    font-size: 22px;
    border-bottom: 1px solid purple;
    color: rgb(255, 238, 0);
    padding: 10px;
    margin-top: -5px;
}
header li
{
    display: block;
    list-style: none;
    margin-top: 15px;
    font-weight: 800;
}
header button
{
    display: block;
    width: 160px;
    height: 50px;
    border: none;
    border-radius: 15px;
    background: purple;
    color: rgb(0, 247, 255);
    font-size: 20px;
    margin-top: 50px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0px 1px 17px rgba(0, 255, 234, 0.5);
}
header p
{
    margin-top: 150px;
}
header span
{
    display: block;
    margin-top: 30px;
    color: slategrey;
}