/* 病態図鑑 site.css. 図のSVGは currentColor で描かれているので, 地色と文字色をここで決めるだけで両テーマに乗る. */
:root {
  --bg: #f6f6f4;
  --bg-raise: #ffffff;
  --bg-sunk: #eeeeeb;
  --fg: #1c1c1e;
  --fg-2: #4d4d52;
  --fg-3: #7a7a80;
  --line: #e2e2dd;
  --line-2: #cfcfc9;
  --accent: #2b8a6e;
  --accent-ink: #1f6b55;
  --accent-soft: rgba(43, 138, 110, 0.10);
  --shadow: 0 1px 2px rgba(28, 28, 30, 0.04), 0 10px 30px rgba(28, 28, 30, 0.06);
  --r: 14px;
  --r-s: 8px;
  --wrap: 1180px;
  --font: 'Inter', 'Noto Sans JP', 'Hiragino Sans', 'BIZ UDPGothic', 'Yu Gothic UI', system-ui, sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #151517;
  --bg-raise: #1e1e21;
  --bg-sunk: #101012;
  --fg: #ececea;
  --fg-2: #b4b4b0;
  --fg-3: #85858a;
  --line: #2b2b2f;
  --line-2: #3a3a40;
  --accent: #4fb693;
  --accent-ink: #7bcbb0;
  --accent-soft: rgba(79, 182, 147, 0.14);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151517;
    --bg-raise: #1e1e21;
    --bg-sunk: #101012;
    --fg: #ececea;
    --fg-2: #b4b4b0;
    --fg-3: #85858a;
    --line: #2b2b2f;
    --line-2: #3a3a40;
    --accent: #4fb693;
    --accent-ink: #7bcbb0;
    --accent-soft: rgba(79, 182, 147, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-feature-settings: "palt";
  line-height: 1.75;
  font-size: 16px;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent-ink); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
h1, h2, h3 { line-height: 1.3; letter-spacing: -0.01em; margin: 0; font-weight: 700; }
p { margin: 0; }
svg { display: block; }
.wrap { width: min(100% - 32px, var(--wrap)); margin-inline: auto; }
main.wrap { flex: 1; padding-block: 28px 72px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 12px; border-radius: var(--r-s); z-index: 20; }
.skip:focus { left: 8px; }
.unverified { color: var(--fg-3); }

/* ============ header ============ */
.site-head { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 10; }
.head-row { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: var(--fg); font-weight: 700; font-size: 17px; flex: none; }
.brand-mark { width: 26px; height: 26px; }
.nav { display: flex; gap: 2px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { text-decoration: none; color: var(--fg-2); padding: 6px 10px; border-radius: 999px; font-size: 14px; white-space: nowrap; }
.nav a:hover { background: var(--bg-sunk); color: var(--fg); }
.nav-count { font-size: 11px; color: var(--fg-3); margin-left: 4px; }
.nav-about { color: var(--fg-3); }
.theme-btn { flex: none; width: 36px; height: 36px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg-raise); color: var(--fg-2); display: grid; place-items: center; cursor: pointer; }
.theme-btn:hover { color: var(--fg); border-color: var(--line-2); }
.theme-btn .ic-moon { display: none; }
:root[data-theme="dark"] .theme-btn .ic-moon { display: block; }
:root[data-theme="dark"] .theme-btn .ic-sun { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .ic-moon { display: block; }
  :root:not([data-theme="light"]) .theme-btn .ic-sun { display: none; }
}
@media (max-width: 720px) {
  .nav-about { display: none; }
  .nav a { padding: 6px 8px; font-size: 13px; }
}

/* ============ intro ============ */
.intro { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 20px 48px; padding: 36px 0 44px; border-bottom: 1px solid var(--line); margin-bottom: 36px; align-items: start; }
.intro-title { font-size: clamp(40px, 6vw, 60px); letter-spacing: -0.03em; line-height: 1.05; grid-column: 1; }
.intro-lead { grid-column: 1; font-size: 18px; line-height: 1.8; max-width: 34em; color: var(--fg); }
.intro-lead strong { color: var(--accent-ink); font-weight: 700; }
.intro-sub { grid-column: 1; color: var(--fg-2); font-size: 14.5px; max-width: 36em; }
.stats { grid-column: 2; grid-row: 1 / span 2; margin: 8px 0 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; align-self: start; }
.stats div { background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; }
.stats dt { font-size: 12px; color: var(--fg-3); letter-spacing: 0.02em; }
.stats dd { margin: 2px 0 0; font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.search { grid-column: 2; grid-row: 3; position: relative; }
.search-label { display: block; font-size: 12px; color: var(--fg-3); margin-bottom: 6px; }
.search input { width: 100%; font: inherit; font-size: 15px; padding: 11px 14px; border-radius: var(--r-s); border: 1px solid var(--line-2); background: var(--bg-raise); color: var(--fg); }
.search input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.search input::placeholder { color: var(--fg-3); }
.search-hint { font-size: 13px; color: var(--fg-3); margin-top: 8px; }
@media (max-width: 860px) {
  .intro { grid-template-columns: 1fr; padding-top: 22px; }
  .intro-title, .intro-lead, .intro-sub, .stats, .search { grid-column: 1; grid-row: auto; }
  .stats { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .stats div { padding: 10px 12px; }
  .stats dd { font-size: 18px; }
}
@media (max-width: 480px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* ============ domain sections & cards ============ */
.domain { margin-bottom: 48px; }
.domain[hidden] { display: none; }
.domain-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.domain-head h1, .domain-head h2 { font-size: 24px; }
.domain-head h2 a { color: inherit; text-decoration: none; }
.domain-head h2 a:hover { color: var(--accent-ink); }
.domain-n { font-size: 13px; color: var(--fg-3); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.card { display: flex; flex-direction: column; background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; text-decoration: none; color: inherit; transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s, border-color 0.25s; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--line-2); }
.card:active { transform: translateY(0); }
.card[hidden] { display: none; }
.card::before { content: ""; height: 4px; background: var(--tint); opacity: 0.85; }
.thumb { background: var(--bg-raise); padding: 8px 8px 0; overflow: hidden; border-bottom: 1px solid var(--line); }
.thumb svg { width: 100%; height: 100%; }
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 4px; }
.card-domain { font-size: 12px; color: var(--fg-3); }
.card-title { font-size: 18px; }
.card-sub { font-size: 13.5px; color: var(--fg-2); line-height: 1.6; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag { font-size: 11.5px; color: var(--fg-2); background: var(--bg-sunk); border-radius: 999px; padding: 2px 9px; text-decoration: none; white-space: nowrap; }
a.tag:hover { background: var(--accent-soft); color: var(--accent-ink); }
@media (prefers-reduced-motion: reduce) { .card { transition: none; } .card:hover { transform: none; } }

/* ============ crumbs ============ */
.crumbs { display: flex; gap: 8px; font-size: 13px; color: var(--fg-3); margin-bottom: 18px; }
.crumbs a { color: var(--fg-2); text-decoration: none; }
.crumbs a:hover { color: var(--accent-ink); }

/* ============ figure page ============ */
.fig { max-width: 980px; }
.fig-head { margin-bottom: 20px; }
.fig-title { font-size: clamp(26px, 4vw, 36px); letter-spacing: -0.02em; }
.fig-sub { font-size: 17px; color: var(--fg-2); margin-top: 6px; line-height: 1.6; }
.fig-body { margin: 0; }
.fig-svg { background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--r); padding: 10px; box-shadow: var(--shadow); cursor: zoom-in; }
.fig-svg svg { width: 100%; height: auto; }
.fig-cap { margin-top: 18px; font-size: 15.5px; line-height: 1.85; color: var(--fg); max-width: 62em; }
.fig-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 18px 0 36px; }
.fig-dates { font-size: 13px; color: var(--fg-3); margin-left: auto; font-variant-numeric: tabular-nums; }
.btn { display: inline-flex; align-items: center; gap: 6px; font: inherit; font-size: 14px; font-weight: 600; padding: 8px 14px; border-radius: 999px; background: var(--accent); color: #fff; border: 1px solid transparent; text-decoration: none; cursor: pointer; white-space: nowrap; }
.btn:hover { background: var(--accent-ink); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: var(--bg-raise); color: var(--fg); border-color: var(--line-2); }
.btn-ghost:hover { background: var(--bg-sunk); color: var(--fg); }
:root[data-theme="dark"] .btn { color: #0f1a16; }
:root[data-theme="dark"] .btn-ghost { color: var(--fg); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn { color: #0f1a16; }
  :root:not([data-theme="light"]) .btn-ghost { color: var(--fg); }
}

.fig-sources { border-top: 1px solid var(--line); padding-top: 24px; margin-bottom: 28px; }
.fig-sources h2, .related h2 { font-size: 18px; margin-bottom: 10px; }
.src-lead { font-size: 13.5px; color: var(--fg-2); margin-bottom: 14px; max-width: 60em; }
.src-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.src { display: grid; grid-template-columns: 92px 1fr; gap: 12px; background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--r-s); padding: 12px 14px; }
.src-kind { font-size: 12px; color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 2px 8px; height: fit-content; text-align: center; margin-top: 2px; }
.src-name { font-weight: 600; font-size: 15px; line-height: 1.5; }
.src-meta { font-size: 13px; color: var(--fg-2); margin-top: 2px; }
.src-where { font-size: 13px; color: var(--fg-2); margin-top: 4px; line-height: 1.6; }
.src-links { font-size: 13px; margin-top: 6px; display: flex; gap: 12px; }
.src-foot { font-size: 12.5px; color: var(--fg-3); margin-top: 12px; }
@media (max-width: 520px) { .src { grid-template-columns: 1fr; gap: 6px; } .src-kind { width: fit-content; } }

.fig-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 30px; }
.tags-label { font-size: 12px; color: var(--fg-3); margin-right: 4px; }
.related { border-top: 1px solid var(--line); padding-top: 22px; margin-bottom: 30px; }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.related a { display: flex; gap: 10px; align-items: baseline; text-decoration: none; color: var(--fg); padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--r-s); background: var(--bg-raise); }
.related a:hover { border-color: var(--accent); color: var(--accent-ink); }
.rel-domain { font-size: 12px; color: var(--fg-3); flex: none; }
.pn { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; border-top: 1px solid var(--line); padding-top: 18px; }
.pn a { text-decoration: none; color: var(--fg); font-size: 14px; line-height: 1.5; }
.pn a span { display: block; font-size: 12px; color: var(--fg-3); }
.pn a:hover { color: var(--accent-ink); }
.pn-next { text-align: right; }

/* ============ zoom overlay ============ */
.zoom { position: fixed; inset: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 96%, transparent); overflow: auto; padding: 24px; }
.zoom[hidden] { display: none; }
.zoom-inner { min-width: 900px; max-width: 1600px; margin: 24px auto; background: var(--bg-raise); border-radius: var(--r); padding: 16px; box-shadow: var(--shadow); }
.zoom-inner svg { width: 100%; height: auto; }
.zoom-close { position: fixed; top: 14px; right: 14px; width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--bg-raise); color: var(--fg); font-size: 22px; line-height: 1; cursor: pointer; z-index: 31; }
body.zoom-open { overflow: hidden; }

/* ============ prose (about / 404) ============ */
.prose { max-width: 720px; }
.prose h1 { font-size: 32px; margin-bottom: 18px; letter-spacing: -0.02em; }
.prose h2 { font-size: 20px; margin: 34px 0 10px; }
.prose p, .prose li { font-size: 15.5px; line-height: 1.9; }
.prose p + p { margin-top: 10px; }
.prose ul { padding-left: 1.3em; margin: 0; }
.prose li + li { margin-top: 6px; }
.contact { background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--r-s); padding: 12px 14px; margin-top: 12px; }
.mail { font-variant-numeric: tabular-nums; cursor: pointer; color: var(--accent-ink); }
.about-meta { color: var(--fg-3); font-size: 13px; margin-top: 36px; }
.notfound { padding-top: 40px; }
.notfound p + p { margin-top: 18px; }

/* ============ footer ============ */
.site-foot { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--fg-2); font-size: 13.5px; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 12px 40px; }
.foot-brand { font-weight: 700; color: var(--fg); font-size: 15px; margin-bottom: 6px; }
.foot-note { max-width: 60em; line-height: 1.7; }
.foot-links { display: flex; flex-direction: column; gap: 4px; }
.foot-links a { color: var(--fg-2); text-decoration: none; }
.foot-links a:hover { color: var(--accent-ink); }
.foot-meta { grid-column: 1 / -1; color: var(--fg-3); font-size: 12.5px; margin-top: 8px; }
@media (max-width: 720px) { .foot-grid { grid-template-columns: 1fr; } }