html {
    margin: 0;
    padding: 0;
}
body {
    margin: 0;
    padding: 0;
    font-family: "ヒラギノ角ゴ Pro","游ゴシック Medium","游ゴシック体","Helvetica Neue",Arial,sans-serif;
    color: #333;
    box-sizing: border-box;
    background: linear-gradient(210deg, rgba(255, 255, 255, 1.0), rgba(255, 255, 255, 0.75)),url("../image/1img_1400.jpg");
    background-size: cover;
}
header {
    height: 5vh;
    border-bottom: 1px solid #666;
}
main {
    min-height: 85vh;
}
footer {
    height: 5vh;
    border-top: 1px solid #666;
    text-align: center;
}
a {
    color: #333;
    text-decoration: none;
}
a:hover {
    color: orange;
}
h1 {
    font-size: 40px;
    text-align: center;
    padding-top: 40px;
    padding-bottom: 0;
    margin: 0;
}
h2 {
    font-size: 18px;
    text-align: center;
    padding: 0;
    padding-top: 6px;
    margin: 0;
}
h3 {
    font-size: 10px;
    text-align: center;
    padding: 0;
    margin: 0;
}
ul {
    list-style: none;
    font-size: 20px;
    margin: 0 auto;
    margin-top: 40px;
    padding: 0;
    text-align: center;
}
li {
    padding: 10px;
}
@media screen and (min-width: 800px) {
    div#logo {
        width: 800px;
        margin: 0 auto;
    }
    main {
        width: 800px;
        margin: 0 auto;
    }
    div#logo {
        width: 800px;
        margin: 0 auto;
    }
}