@import url('https://fonts.googleapis.com/css?family=Noto+Sans+JP');

body {
    font-family: "Noto Sans JP", sans-serif;
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    background-color: rgba(40, 40, 40, 1);
    color: white;
}

main {
    margin-left: 10px;
    padding-left: 10px;
    border-left: dashed 1px red;
}

div {
    margin-top: 1px;
    margin-bottom: 5px;
    margin-left: 10px;
}

a {
    color: aqua;
    display: block;
    transition: all 0.5s 0s ease;
}

a:hover {
    color: red;
}

table {
    border-collapse: collapse;
}

th {
    border: solid 1px white;
    background-color: gray;
    font-weight: normal;
}

td {
    border: solid 1px white;
}

ul {
    margin-top: 1px;
    margin-bottom: 1px;
}

li {
    margin-top: 1px;
    margin-bottom: 1px;
}

h1 {
    margin-top: 10px;
    margin-bottom: 1px;
    padding-left: 10px;
    border: solid 2px red;
    border-top: solid 5px red;
    border-left: solid 10px red;
    font-weight: bold;
    color: red;
}

h2 {
    margin-top: 10px;
    margin-bottom: 1px;
    padding-left: 5px;
    border: solid 1px red;
    border-left: solid 5px red;
    font-weight: bold;
    color: red;
}

h3 {
    margin-top: 10px;
    margin-bottom: 1px;
    padding-left: 5px;
    border: solid 1px red;
    font-weight: bold;
    color: red;
}

h4 {
    margin-top: 0px;
    margin-bottom: 0px;
    font-weight: bold;
    color: white;
}

h5,
h6 {
    margin-top: 0px;
    margin-bottom: 0px;
    font-weight: normal;
    color: white;
}

.header {
    display: flex;
    top: 0;
}

.navigation {
    display: flex;
    justify-content: start;
    background-color: red;
    padding-top: 5px;
    padding-bottom: 5px;
    padding-left: 5px;
    padding-right: 5px;
}

.navigation-button {
    width: auto;
    height: 30px;
    background-color: black;
    margin-right: 5px;
    padding-right: 5px;
    padding-left: 5px;
    text-align: center;
    font-size: 20px;
    transition: all 0.5s 0s ease;
}

.navigation-button:hover {
    background-color: white;
}

.modified-datetime {
    text-align: right;
    font-size: small;
}

.footer {
    bottom: 0;
    margin-top: 1px;
    border-top: solid 10px red;
}

.copyright {
    text-align: right;
    font-size: xx-small;
}