* {
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
body {
    font-family: "Roboto Mono", monospace;
    background-color: #efefef;
    color: #101010;
}
.nav_top{
    position: fixed;
    z-index: 1;
    display: block;
    top: 0;
    width: 100%;
    height: 50px;
    background-color: black;
    box-shadow: 0px 4px 8px grey;
}
.nav_top_title{
    float: left;
    margin: 10px 20px 10px 20px;
    line-height: 30px;
    color: white;
    text-decoration: none;
    font-size: 20px;
}
.nav_top_item{
    float: right;
    margin: 10px;
    line-height: 30px;
    color: whitesmoke;
    text-decoration: none;
    font-size: 14px;
}
.nav_search{
    float: right;
    margin: 10px;
    padding: 7px 10px 7px 0;
    height: 30px;
}
.nav_search_icon{ width: 16px; height: 16px; }
.banner_top{ width: 100%; height: 40dvh; object-fit: fill; padding-top: 50px; }
main{
    min-height: calc(60dvh - 158px);
    width: 100%;
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0px 4px 8px grey;
}
.page_title { line-height: 28px; font-size: 20px; font-weight: bold; }
hr { margin: 20px 0 40px 0; border-top: 1px solid #cccccc; }
h1 { margin: 10px 0; line-height: 42px; font-size: 28px;}
h2 { margin: 10px 0; line-height: 36px; font-size: 24px; border-left: 4px solid #cccccc; margin: 5px 0; padding-left: 10px; }
h3 { margin: 10px 0; line-height: 30px; font-size: 20px; text-decoration: underline solid #cccccc 3px; }
h4 { margin: 10px 0; line-height: 24px; font-size: 16px; }
.div_content{ margin-top: 20px; }
main > a { padding-left: 10px; line-height: 24px; font-size: 16px; }
main > p { padding-left: 10px; line-height: 24px; font-size: 16px; }
main > img { display: inline-block; vertical-align: top; width: 100%; }
.table_container { width: 100%; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { min-width: 50%; border-collapse: collapse; }
table > thead > tr { background-color: #1a1a1a; }
table > thead > tr > th { color: #efefef; }
a { max-width: 100%; overflow-wrap: break-word; word-break: break-all; }
th, td { border: 1px solid #cccccc; text-align: center; vertical-align: middle; padding: 10px; white-space: nowrap; }
.bg_f5f5f5 { background-color: #f5f5f5; }
.img15{ width: 15%; }
.img20{ width: 20%; }
.img25{ width: 25%; }
.img30{ width: 30%; }
.img35{ width: 35%; }
.img40{ width: 40%; }
.img45{ width: 45%; }
.image_modal {
    position: fixed;
    z-index: 87;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
}
.image_modal_content {
    max-width: 90%;
    max-height: 90dvh;
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    object-fit: contain;
}
.image_modal_close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #ffffff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    transition: color 0.2s ease;
}
.image_modal_close:hover { color: red; }
footer{
    width: 100%;
    height: 128px;
    padding: 10px 0;
    background-color: lightgrey;
}
footer > p{ line-height: 18px; text-align: center; font-size: 12px; }
.blank_100{ height: 100px; }
.blank_50{ height: 50px; }
@media screen and (min-width: 769px) {
    .nav_bottom_item{ display: none; }
    .nav_bottom_item_select{ display: none; }
}
@media screen and (max-width: 768px) {
    .nav_top_item{ display: none; }
    .nav_bottom{
        position: fixed;
        z-index: 1;
        display: flex;
        bottom: 0;
        width: 100%;
        height: 60px;
        background-color: black;
        box-shadow: 0px 4px 8px grey;
    }
    .nav_bottom_item{
        float: left;
        padding: 10px 0px 20px 0px;
        flex: 1;
        line-height: 30px;
        color: grey;
        text-decoration: none;
        text-align: center;
        font-size: 14px;
    }
    .nav_bottom_item_select{
        float: left;
        padding: 10px 0px 20px 0px;
        flex: 1;
        line-height: 30px;
        color: whitesmoke;
        text-decoration: none;
        text-align: center;
        font-size: 14px;
        background-color: #303030;
    }
    .banner_top{ height: 30dvh; }
    main{ min-height: calc(70dvh - 158px); width: 95%; }
    table { min-width: 100%; }
    footer{ margin-bottom: 60px; }
    .img15{ width: 30%; }
    .img20{ width: 40%; }
    .img25{ width: 50%; }
    .img30{ width: 60%; }
    .img35{ width: 70%; }
    .img40{ width: 80%; }
    .img45{ width: 90%; }
}
@media screen and (max-width: 950px) {
    main{ width: 95%; }
}