@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400..900&display=swap');
html {
    background-color: #000;
    color: #fff;
    font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Osaka, "ＭＳ Ｐゴシック", tahoma, verdana, sans-serif;
    font-size: 15px;
    background-image: url(./img/back.png);
}
body {
    max-width: 700px;
    margin: auto;
}
nav {
    display: flex;
    margin: auto;
    width: 100%;
    justify-content: space-evenly;
    flex-grow: 0;
    background-color: #000;
    align-items: center;
}
nav a {
    display: block;
    padding: 10px 40px;
}
main {
    background-color: #fff;
    color: #000;
    overflow: auto;
    padding-bottom: 50px;
    flex-grow: 1;
}
article {
    max-width: 700px;
    padding: 20px;
    padding-bottom: 0;
    margin-bottom: 0;
}
section {
    margin: 20px auto;
    max-width: 550px;
    padding: 10px;
    border: 1px dashed #999;
    background-color: #f0f0f0;
}
footer {
    text-align: center;
    padding: 10px;
    background-color: #000;
    color: #fff;
}
header {
    max-height: 350px;
    aspect-ratio: 2 / 1;
    background-image: url(./img/banner.png);
    flex-grow: 0;
}
h1 {
    color: #fff;
    text-align: right;
    margin: 0;
    padding: 5px;
    font-size: 3em;
    -webkit-text-stroke: 2px #000;
}
h2 {
    border: solid #666;
    border-width: 0px 0px 2px 15px;
    padding-left: 3px;
    margin: 0;
    background-color: #fff;
}
h1, h2 {
  font-family: "Orbitron";
  font-optical-sizing: auto;
  font-weight: 600;
  font-style: normal;
}
strong, b, em, i, u, del, s, small, h2 { color: #39c; }
h3, a:hover { color: #3c6; }
a { color: #093; }
h3 {
    border-bottom: 1px solid;
    text-align: right;
    font-size: 1.5em;
    padding: 0; margin: 0;
    margin-bottom: 10px;
}
ul {
    margin: 0; padding: 0;
    list-style: none;
    text-align: center;
}
li {
    margin: 5px;
}

.right {
    float: right;
    margin-right: 1px;
    margin-left: 10px;
    margin-bottom: 0;
    padding: 2px;
    border: 1px solid #000;
    background-color: #fff;
}
.left {
    float: left;
    margin-left: 1px;
    margin-right: 10px;
    margin-bottom: 0;
    padding: 2px;
    border: 1px solid #000;
    background-color: #fff;
}
.left:has(a), .right:has(a) {
    padding: 5px;
}
.clearfix {
    clear: both;
}