* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: #f4f6f9;
    color: #333333;
    line-height: 1.6;
    padding: 20px;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}
header {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2rem;
}

header p {
    margin: 0.5rem 0 0;
    font-size: 0.95rem;
    opacity: 0.9;
}
.intro-box {
    background-color: #f8f9fa;
    border: 1px solid #e0e0e0;
    padding: 15px;
    border-radius: 6px;
    font-size: 15px;
    margin-bottom: 30px;
}
.intro-box p { margin-bottom: 8px; }
.intro-box p:last-child { margin-bottom: 0; }
.category-section { margin-bottom: 35px; }
.category-title {
    font-size: 19px;
    color: #111111;
    background: #eef2f7;
    padding: 10px 15px;
    border-left: 5px solid #0066cc;
    margin-bottom: 5px;
    border-radius: 0 4px 4px 0;
    font-weight: bold;
}
.category-desc {
    font-size: 14px;
    color: #666666;
    margin-bottom: 15px;
    padding-left: 5px;
}
.tag-table { width: 100%; border-collapse: collapse; margin-bottom: 10px; }
.tag-table tr { border-bottom: 1px solid #eeeeee; }
.tag-table tr:last-child { border-bottom: none; }
.tag-table td { padding: 14px 10px; vertical-align: middle; font-size: 15px; }
.tag-name-cell { width: 150px; font-weight: bold; color: #d93025; font-family: Consolas, Monaco, monospace; }
.tag-info-cell { color: #333333; }
.tag-link-cell { width: 120px; text-align: right; white-space: nowrap; }
.btn-detail {
    display: inline-block;
    background-color: #0066cc;
    color: #ffffff;
    text-decoration: none;
    padding: 6px 12px;
    font-size: 13px;
    border-radius: 4px;
    font-weight: bold;
    transition: background-color 0.2s;
}
.btn-detail:hover { background-color: #004499; }
.reference-box {
    background-color: #fff9e6;
    border: 1px solid #ffe0b2;
    padding: 15px;
    border-radius: 6px;
    font-size: 14px;
    margin-top: 40px;
    margin-bottom: 35px;
}
.reference-link { color: #0066cc; text-decoration: none; font-weight: bold; }
.reference-link:hover { text-decoration: underline; }
.nav-footer { text-align: center; border-top: 1px solid #e0e0e0; padding-top: 25px; }
.btn-back {
    display: inline-block;
    min-width: 180px;
    background-color: #5f6368;
    color: #ffffff;
    text-decoration: none;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 25px;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: background-color 0.2s, transform 0.1s;
}
.btn-back:hover { background-color: #45474a; }
.btn-back:active { transform: scale(0.98); }
html {
  scroll-behavior: smooth;
}
.pagetop {
  display: flex;
  align-items: center;
  justify-content: center;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background-color: #333;
  color: #fff;
  text-decoration: none;
  border-radius: 50%;
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  z-index: 99;
}
.pagetop.is-show {
  opacity: 1;
  visibility: visible;
}
.lemon { margin-top: 15px; }
@media screen and (min-width: 1024px) {
}
@media (min-width: 835px) and (max-width: 1023px) {
    .container { padding: 25px; }
}
@media (min-width: 744px) and (max-width: 834px) {
    body { padding: 15px; }
    .container { padding: 20px; }
    h1 { font-size: 24px; }
}
@media (min-width: 541px) and (max-width: 743px) {
    body { padding: 10px; }
    .container { padding: 15px; border-radius: 6px; }
    h1 { font-size: 22px; }
    .category-title { font-size: 18px; }
    .tag-table td { padding: 12px 8px; font-size: 14px; }
    .tag-name-cell { width: 130px; }
    .tag-link-cell { width: 100px; }
}
@media (min-width: 441px) and (max-width: 540px) {
    body { padding: 8px; }
    .container { padding: 15px 10px; }
    h1 { font-size: 20px; }
    .category-title { font-size: 17px; padding: 8px 12px; }
    .intro-box, .reference-box { padding: 12px; font-size: 14px; }
    .tag-table td { padding: 10px 6px; font-size: 13px; }
    .tag-name-cell { width: 110px; }
    .tag-link-cell { width: 90px; }
    .btn-detail { padding: 5px 10px; font-size: 12px; }
    .btn-back { min-width: 150px; padding: 10px 20px; font-size: 15px; }
}
@media (min-width: 391px) and (max-width: 440px) {
    body { padding: 5px; }
    .container { padding: 12px 8px; box-shadow: none; border-radius: 4px; }
    h1 { font-size: 19px; }
    .category-title { font-size: 16px; }
    .tag-table td { padding: 10px 4px; font-size: 13px; }
    .tag-name-cell { width: 100px; }
    .tag-link-cell { width: 85px; }
}
@media (min-width: 381px) and (max-width: 390px) {
    body { padding: 5px; }
    .container { padding: 10px 6px; border-radius: 0; }
    h1 { font-size: 18px; margin-bottom: 10px; }
    .category-title { font-size: 15px; }
    .tag-table td { padding: 8px 4px; font-size: 12.5px; }
    .tag-name-cell { width: 90px; }
    .tag-link-cell { width: 80px; }
    .btn-detail { padding: 4px 8px; font-weight: normal; }
}
@media (min-width: 375px) and (max-width: 380px) {
    body { padding: 4px; }
    .container { padding: 10px 5px; }
    h1 { font-size: 18px; }
    .category-title { font-size: 15px; }
    .tag-table td { padding: 8px 2px; font-size: 12px; }
    .tag-name-cell { width: 85px; }
    .tag-link-cell { width: 75px; }
}
@media (max-width: 374px) {
    body { padding: 0; }
    .container { padding: 10px 8px; border-radius: 0; }
    h1 { font-size: 17px; }
    .category-title { font-size: 14px; padding: 6px 10px; }
    .tag-table, .tag-table tbody, .tag-table tr, .tag-table td {
        display: block;
        width: 100% !important;
        text-align: left !important;
    }
    .tag-table tr {
        padding: 10px 0;
        border-bottom: 1px solid #eeeeee;
    }
    .tag-table td {
        padding: 2px 0;
        font-size: 13px;
    }
    .tag-name-cell { color: #d93025; font-size: 14px; }
    .tag-link-cell { margin-top: 5px; }
    .btn-detail { display: block; text-align: center; width: 100%; padding: 8px; }
    .btn-back { display: block; width: 100%; min-width: 0; }
}