@charset "utf-8";
/* Reset & Box Sizing */
*, *::before, *::after {
    box-sizing: border-box;
}
body {
    font-family: 'Roboto', 'Noto Sans JP', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: #333;
    margin: 0;
}
a:link, a:visited, a:active {
    color: #3e8acc;
}
h1 {
    text-align: center;
    margin-bottom: 20px;
    padding-top: 20px;
    font-size: 28px;
}
h2 {
    font-size: 20px;
    margin-bottom: 15px;
}
p {
    margin-top: 0;
    margin-bottom: 1em;
}
/* Utilities */
.inline-block {
    display: inline-block;
}
.line-through {
    text-decoration: line-through;
}
.c-red {
    color: #D2321E;
    font-weight: bold;
}
.note {
    font-size: 0.9em;
    color: #666;
    margin-top: 15px;
}
/* Layout Units */
.contents {
    margin-top: 10px;
    margin-bottom: 30px;
}
.pd {
    padding-right: 20px;
    padding-left: 20px;
}
.header_container {
    background: #111111;
}
.header {
    padding-top: 15px;
    padding-bottom: 15px;
}
/* Flexbox Grid Layout for Images */
.media-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.block {
    flex: 1 1 calc(50% - 20px);
    max-width: 500px;
}
.responsive-img {
    display: block;
    width: 100%;
    height: auto;
}
/* Table Design */
.table-detail {
    width: 100%;
    border-collapse: collapse;
}
.table-detail th, .table-detail td {
    border: none;
    padding: 8px 0;
}
.table-detail th {
    font-weight: normal;
    text-align: left;
    width: 120px;
    vertical-align: top;
}
/* Responsive Media Queries */
@media screen and (max-width: 920px) {
    body {
        font-size: 14px;
        line-height: 1.7;
    }
}
@media screen and (max-width: 480px) {
    h1 {
        font-size: 22px;
    }
    .pd {
        padding-right: 15px;
        padding-left: 15px;
    }
    .block {
        flex: 1 1 100%;
    }
    .table-detail th {
        width: 90px;
    }
}