test.css

* {
    margin: 0;
    padding: 0;
}

body {
    font-family: ;
    font-size: 28px;
    color: #000;
    text-align: center;
}

li {
    list-style: none;
}

header {
    height: 60px;
    width: 100%;
    font-size: 30px;
    color: #ffffff;
    background: #2653d0;
    padding: 20px 40px;
    float: left;
    text-align: left;
}

p {
    font-size: 28px;
    color: #000;
}

.self-intro {
    font-size: 28px;
    color: #000;
}

.ushitapu {
    font-size: 36px;
    color: #f00;
}

.table {
    margin:0 auto;
    width:50%;
}

.table th {
    background: #cfcfcf
}

.table span {
    color:#f00
}

.yabasite {
    background: #ff0000;
    width: 200px;
    font-size: 36px;
    color: #f00;
    margin: 0 auto;
}

footer {
    height: 60px;
    width: 100%;
    font-size: 30px;
    color: #fff;
    background: #333;
    padding: 20px 40px;
}