:root {
  --mia-blue: #1577d4;
  --mia-blue-dark: #075ba9;
  --mia-blue-soft: #edf6ff;
  --mia-ink: #20242a;
  --mia-muted: #66717d;
  --mia-line: #d9dee5;
  --mia-bg: #f3f4f6;
  --mia-panel: #fff;
  --mia-warning: #fff5d9;
  --mia-max: 1160px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  color: var(--mia-ink);
  background: var(--mia-bg);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--mia-bg); color: var(--mia-ink); line-height: 1.85; }
a { color: #0569c3; text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
img { max-width: 100%; height: auto; }
button, input { font: inherit; }

.mia-skip {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 20;
  padding: 8px 12px;
  color: #fff;
  background: #111;
}
.mia-skip:focus { top: 12px; }

.mia-header { background: var(--mia-blue); color: #fff; border-bottom: 1px solid #075ba9; }
.mia-header__inner {
  width: min(calc(100% - 28px), var(--mia-max));
  min-height: 58px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.mia-brand { color: #fff; display: flex; align-items: baseline; gap: 9px; white-space: nowrap; }
.mia-brand:hover { text-decoration: none; }
.mia-brand strong { font-size: 1.08rem; letter-spacing: .02em; }
.mia-brand small { color: #d9edff; font-size: .74rem; }
.mia-nav { margin-left: auto; display: flex; gap: 18px; font-size: .88rem; }
.mia-nav a { color: #fff; }

.mia-searchbar { background: #fff; border-bottom: 1px solid var(--mia-line); }
.mia-searchbar form {
  width: min(calc(100% - 28px), var(--mia-max));
  margin: 0 auto;
  padding: 12px 0;
  display: grid;
  grid-template-columns: 1fr auto;
}
.mia-searchbar input {
  min-width: 0;
  border: 1px solid #aeb8c3;
  border-right: 0;
  border-radius: 4px 0 0 4px;
  padding: 10px 12px;
  background: #fff;
}
.mia-searchbar button {
  border: 1px solid var(--mia-blue-dark);
  border-radius: 0 4px 4px 0;
  padding: 0 22px;
  color: #fff;
  background: var(--mia-blue);
  font-weight: 700;
  cursor: pointer;
}

.mia-shell { width: min(calc(100% - 28px), var(--mia-max)); margin: 0 auto; }
.mia-breadcrumbs { padding: 13px 0 9px; font-size: .78rem; color: var(--mia-muted); }
.mia-breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 7px; margin: 0; padding: 0; list-style: none; }
.mia-breadcrumbs li + li::before { content: "/"; margin-right: 7px; color: #9aa3ad; }

.mia-home-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 18px; align-items: start; }
.mia-panel { background: var(--mia-panel); border: 1px solid var(--mia-line); }
.mia-panel__header { padding: 13px 16px; border-bottom: 1px solid var(--mia-line); display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.mia-panel__header h2 { margin: 0; font-size: 1.05rem; }
.mia-panel__header a { font-size: .78rem; }
.mia-panel__body { padding: 16px; }

.mia-intro { margin-bottom: 18px; padding: 22px; background: #fff; border: 1px solid var(--mia-line); }
.mia-intro__label { margin: 0 0 4px; color: var(--mia-blue-dark); font-size: .76rem; font-weight: 700; }
.mia-intro h1 { margin: 0; font-size: clamp(1.55rem, 4vw, 2.2rem); line-height: 1.35; }
.mia-intro p:last-child { max-width: 760px; margin: 10px 0 0; color: #4f5862; }

.mia-feature-list { display: grid; gap: 0; }
.mia-feature {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 15px;
  padding: 15px;
  border-top: 1px solid var(--mia-line);
}
.mia-feature:first-child { border-top: 0; }
.mia-feature img { width: 150px; height: 110px; object-fit: cover; border: 1px solid #e0e4e8; background: #eef1f4; }
.mia-feature__type { margin: 0 0 2px; color: var(--mia-muted); font-size: .72rem; font-weight: 700; }
.mia-feature h3 { margin: 0; font-size: 1.04rem; line-height: 1.45; }
.mia-feature p:last-child { margin: 6px 0 0; color: #4d5661; font-size: .88rem; line-height: 1.7; }

.mia-side-stack { display: grid; gap: 18px; }
.mia-category-list, .mia-link-list { margin: 0; padding: 0; list-style: none; }
.mia-category-list li + li, .mia-link-list li + li { border-top: 1px solid #e5e8ec; }
.mia-category-list a, .mia-link-list a { display: flex; justify-content: space-between; gap: 10px; padding: 10px 0; }
.mia-category-list strong { color: var(--mia-muted); font-size: .76rem; }
.mia-note { margin: 0; color: var(--mia-muted); font-size: .82rem; }

.mia-search-results { margin: 0 0 18px; padding: 0; list-style: none; background: #fff; border: 1px solid var(--mia-line); }
.mia-search-results[hidden] { display: none; }
.mia-search-results li + li { border-top: 1px solid var(--mia-line); }
.mia-search-results a { display: block; padding: 12px 15px; }
.mia-search-results strong { display: block; }
.mia-search-results span { display: block; color: var(--mia-muted); font-size: .8rem; }
.mia-search-empty { padding: 14px 15px; color: var(--mia-muted); }

.mia-article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 20px; align-items: start; }
.mia-article { min-width: 0; background: #fff; border: 1px solid var(--mia-line); }
.mia-article__header { padding: 24px 25px 18px; border-bottom: 1px solid var(--mia-line); }
.mia-article__kind { margin: 0 0 4px; color: var(--mia-blue-dark); font-size: .74rem; font-weight: 700; }
.mia-article h1 { margin: 0; font-size: clamp(1.7rem, 4vw, 2.45rem); line-height: 1.3; }
.mia-article__reading { margin: 4px 0 0; color: var(--mia-muted); font-size: .8rem; }
.mia-article__lead { margin: 14px 0 0; font-size: 1rem; }
.mia-spoiler { margin: 14px 0 0; padding: 9px 12px; background: var(--mia-warning); border-left: 4px solid #e0ab28; font-size: .82rem; }

.mia-hero-figure { margin: 0; border-bottom: 1px solid var(--mia-line); background: #eef1f4; }
.mia-hero-figure img { display: block; width: 100%; max-height: 600px; object-fit: contain; }
.mia-hero-figure figcaption, .mia-gallery figcaption { padding: 9px 12px; background: #fafafa; color: var(--mia-muted); font-size: .75rem; line-height: 1.55; }

.mia-article__body { padding: 22px 25px 30px; }
.mia-article__body h2 { margin: 2.2em 0 .75em; padding-bottom: .35em; border-bottom: 2px solid var(--mia-blue); font-size: 1.36rem; line-height: 1.45; }
.mia-article__body h2:first-child { margin-top: 0; }
.mia-article__body p { margin: 0 0 1.15em; text-align: justify; }
.mia-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 24px 0; }
.mia-gallery figure { margin: 0; border: 1px solid var(--mia-line); background: #f2f4f6; }
.mia-gallery img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; }

.mia-infobox { background: #fff; border: 1px solid var(--mia-line); }
.mia-infobox h2 { margin: 0; padding: 11px 13px; color: #fff; background: var(--mia-blue); font-size: .95rem; }
.mia-infobox dl { margin: 0; }
.mia-infobox dl > div { display: grid; grid-template-columns: 88px 1fr; border-top: 1px solid #e4e7eb; font-size: .8rem; }
.mia-infobox dt { padding: 8px 9px; background: #f3f6f9; font-weight: 700; }
.mia-infobox dd { margin: 0; padding: 8px 9px; }
.mia-toc { margin-top: 16px; padding: 13px; background: #fff; border: 1px solid var(--mia-line); }
.mia-toc h2 { margin: 0 0 8px; font-size: .92rem; }
.mia-toc ol { margin: 0; padding-left: 1.4em; font-size: .78rem; line-height: 1.65; }
.mia-toc li + li { margin-top: 5px; }

.mia-related { margin-top: 22px; border-top: 1px solid var(--mia-line); padding-top: 18px; }
.mia-related h2, .mia-sources h2 { font-size: 1.05rem; }
.mia-related ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; padding: 0; list-style: none; }
.mia-related a { display: block; height: 100%; padding: 10px; border: 1px solid var(--mia-line); background: var(--mia-blue-soft); }
.mia-related strong { display: block; }
.mia-related span { color: var(--mia-muted); font-size: .72rem; }
.mia-sources { margin-top: 25px; padding-top: 18px; border-top: 1px solid var(--mia-line); }
.mia-sources ul { padding-left: 1.3em; font-size: .8rem; word-break: break-all; }

.mia-index-catalog { margin-top: 2rem; border-top: 1px solid var(--mia-line); padding-top: 1rem; }
.mia-index-group + .mia-index-group { margin-top: 1.25rem; }
.mia-index-group h3 { margin: 0 0 .55rem; font-size: 1rem; }
.mia-index-group ul { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: .35rem .9rem; margin: 0; padding: 0; list-style: none; }
.mia-index-group li { min-width: 0; border-bottom: 1px dotted var(--mia-line); padding: .3rem 0; }
.mia-index-group a, .mia-index-group span { display: block; overflow-wrap: anywhere; }

.mia-footer { margin-top: 35px; border-top: 1px solid var(--mia-line); background: #fff; }
.mia-footer__inner { width: min(calc(100% - 28px), var(--mia-max)); margin: 0 auto; padding: 20px 0 28px; display: flex; justify-content: space-between; gap: 20px; color: var(--mia-muted); font-size: .78rem; }
.mia-footer p { margin: 0; }

@media (max-width: 860px) {
  .mia-home-grid, .mia-article-layout { grid-template-columns: 1fr; }
  .mia-article-layout > aside { order: -1; }
  .mia-toc { margin-top: 10px; }
  .mia-infobox dl { display: grid; grid-template-columns: 1fr 1fr; }
  .mia-infobox dl > div { grid-template-columns: 92px 1fr; }
}

@media (max-width: 600px) {
  body { line-height: 1.75; }
  .mia-header__inner { min-height: 52px; gap: 10px; }
  .mia-brand small { display: none; }
  .mia-nav { gap: 10px; font-size: .78rem; }
  .mia-feature { grid-template-columns: 92px minmax(0, 1fr); gap: 11px; padding: 12px; }
  .mia-feature img { width: 92px; height: 82px; }
  .mia-feature p:last-child { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
  .mia-article__header, .mia-article__body { padding-left: 16px; padding-right: 16px; }
  .mia-infobox dl { grid-template-columns: 1fr; }
  .mia-gallery { grid-template-columns: 1fr; }
  .mia-related ul { grid-template-columns: 1fr; }
  .mia-footer__inner { display: block; }
  .mia-footer p + p { margin-top: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}