:root {
  --article-bg: #08050b;
  --article-bg-soft: #110a16;
  --article-panel: rgba(18, 10, 22, 0.88);
  --article-ink: #f3e9e0;
  --article-muted: #b7a49b;
  --article-faint: #7d6c66;
  --article-gold: #d9a05b;
  --article-crimson: #e5435f;
  --article-line: rgba(217, 160, 91, 0.25);
  --article-max: 920px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-width: 0;
  margin: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(139, 49, 62, 0.22), transparent 35rem),
    linear-gradient(145deg, var(--article-bg) 0%, var(--article-bg-soft) 52%, #09060d 100%);
  color: var(--article-ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  line-height: 1.95;
}

a {
  color: var(--article-gold);
  text-decoration-color: rgba(217, 160, 91, 0.55);
  text-underline-offset: 0.22em;
}

a:hover,
a:focus-visible {
  color: #f1c884;
}

img {
  display: block;
  max-width: 100%;
}

.article-shell {
  width: min(100% - 2rem, var(--article-max));
  margin: 0 auto;
  padding: 1.75rem 0 5rem;
}

.article-topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--article-line);
}

.site-mark {
  color: var(--article-ink);
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.site-mark span {
  color: var(--article-gold);
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  margin-left: 0.55rem;
}

.topbar-link {
  color: var(--article-muted);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

.breadcrumb {
  color: var(--article-muted);
  font-size: 0.78rem;
  line-height: 1.7;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.7rem;
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  margin-left: 0.7rem;
  color: var(--article-faint);
  content: "/";
}

.article-frame {
  min-width: 0;
  overflow: hidden;
  padding: clamp(1.25rem, 4vw, 3.25rem);
  border: 1px solid var(--article-line);
  background: linear-gradient(180deg, rgba(20, 11, 25, 0.9), var(--article-panel));
  box-shadow: 0 1.5rem 5rem rgba(0, 0, 0, 0.22);
}

.article-kicker {
  margin: 0 0 0.8rem;
  color: var(--article-gold);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--article-ink);
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-weight: 700;
  line-height: 1.45;
}

h1 {
  max-width: 18ch;
  font-size: clamp(2rem, 5vw, 3.7rem);
  letter-spacing: 0.04em;
}

h2 {
  margin-top: 3.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--article-line);
  font-size: clamp(1.35rem, 3vw, 2rem);
}

h3 {
  margin-top: 2rem;
  color: #ecd1aa;
  font-size: 1.15rem;
}

p,
ul,
ol,
dl,
table {
  margin-top: 1rem;
}

p,
li,
dd,
dt,
td,
th {
  font-size: 0.98rem;
}

.article-lede {
  max-width: 44rem;
  margin: 1.5rem 0 0;
  color: #e7d9d0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.9;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.2rem;
  margin: 1.5rem 0 0;
  color: var(--article-muted);
  font-size: 0.78rem;
}

.article-figure {
  margin: 2.5rem 0 0;
}

.article-figure img {
  width: 100%;
  max-height: 27rem;
  object-fit: cover;
  border: 1px solid var(--article-line);
}

.article-figure figcaption {
  margin-top: 0.7rem;
  color: var(--article-faint);
  font-size: 0.76rem;
}

.answer-box {
  margin: 2.5rem 0 0;
  padding: 1.25rem 1.35rem;
  border-left: 2px solid var(--article-crimson);
  background: rgba(94, 22, 39, 0.2);
}

.answer-box h2 {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 1.25rem;
}

.answer-box p {
  margin-bottom: 0;
}

.note {
  color: var(--article-muted);
  font-size: 0.88rem;
}

.concept-map,
.source-list,
.related-list {
  padding-left: 1.25rem;
}

.concept-map li,
.source-list li,
.related-list li {
  margin: 0.55rem 0;
}

.comparison-wrap {
  overflow-x: auto;
  margin-top: 1.25rem;
  border: 1px solid var(--article-line);
}

table {
  width: 100%;
  min-width: 620px;
  margin: 0;
  border-collapse: collapse;
}

th,
td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(217, 160, 91, 0.14);
  text-align: left;
  vertical-align: top;
}

th {
  color: #ecd1aa;
  background: rgba(217, 160, 91, 0.08);
  font-weight: 700;
}

tr:last-child td {
  border-bottom: 0;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.guide-card {
  display: block;
  min-width: 0;
  height: 100%;
  padding: 1.35rem;
  border: 1px solid var(--article-line);
  background: rgba(12, 7, 16, 0.58);
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease;
}

.guide-card:hover,
.guide-card:focus-visible {
  border-color: rgba(229, 67, 95, 0.62);
  background: rgba(86, 20, 35, 0.24);
}

.guide-card small {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--article-gold);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
}

.guide-card strong {
  display: block;
  color: var(--article-ink);
  font-family: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: 1.2rem;
  line-height: 1.5;
}

.guide-card p {
  margin-bottom: 0;
  color: var(--article-muted);
  font-size: 0.86rem;
  line-height: 1.75;
}

.article-footer {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--article-line);
  color: var(--article-muted);
  font-size: 0.82rem;
}

.article-footer p {
  font-size: inherit;
}

@media (max-width: 720px) {
  .article-shell {
    width: min(100% - 1rem, var(--article-max));
    padding-top: 1rem;
  }

  .article-topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.75rem;
  }

  .article-frame {
    padding: 1.15rem;
  }

  h1 {
    max-width: none;
    font-size: clamp(1.8rem, 10vw, 2.75rem);
  }

  h2 {
    margin-top: 2.4rem;
  }

  p,
  li,
  dd,
  dt,
  td,
  th {
    font-size: 0.94rem;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }
}