:root {
  --paper: #f6f1e4;
  --paper-deep: #ece4d1;
  --ink: #2f2718;
  --ink-soft: #6b6152;
  --rule: #d6cbb2;
  --accent: #7a5c2e;
  --shadow: 0 1px 2px rgba(60, 44, 26, .08), 0 8px 24px rgba(60, 44, 26, .07);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, #fbf7ec 0%, transparent 60%),
    var(--paper);
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* --- 見出し --- */

.masthead {
  text-align: center;
  padding: 3.5rem 1.5rem 2rem;
  border-bottom: 1px solid var(--rule);
}

.masthead h1 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 2.9rem);
  letter-spacing: .22em;
  text-indent: .22em;
  font-weight: 600;
}

.tagline {
  margin: .6rem 0 0;
  color: var(--ink-soft);
  font-size: .93rem;
  letter-spacing: .06em;
}

/* --- 画面切り替え --- */

.tabs {
  display: flex;
  justify-content: center;
  gap: 2rem;
  border-bottom: 1px solid var(--rule);
}

.tab {
  font: inherit;
  font-size: .95rem;
  letter-spacing: .14em;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 1rem .5rem .8rem;
  margin-bottom: -1px;
}

.tab:hover { color: var(--accent); }
.tab.is-active { color: var(--ink); border-bottom-color: var(--accent); }

/* --- ランキング --- */

.ranking-wrap { max-width: 780px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }

.rank-block + .rank-block { margin-top: 3.5rem; }

.rank-block h2 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: .14em;
  font-weight: 600;
}

.rank-lead {
  margin: .6rem 0 1.75rem;
  font-size: .87rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.rank {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: rank;
}

.rank-row {
  display: flex;
  gap: .9rem;
  padding: .9rem 0;
  border-top: 1px solid var(--rule);
}

.rank-no {
  flex: 0 0 1.6rem;
  font-size: 1.05rem;
  color: var(--ink-soft);
  text-align: right;
  font-variant-numeric: tabular-nums;
  padding-top: .05rem;
}

.rank-body { flex: 1 1 auto; min-width: 0; }

.rank-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.rank-party { font-size: 1.02rem; font-weight: 600; }
.rank-count { font-size: .95rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.rank-count small { color: var(--ink-soft); font-size: .78rem; }

.rank-bar {
  height: 6px;
  margin: .45rem 0 .5rem;
  background: var(--paper-deep);
  border-radius: 999px;
  overflow: hidden;
}

.rank-bar span { display: block; height: 100%; }

.rank-words {
  margin: 0;
  font-size: .8rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* --- 絞り込み --- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  padding: 1.75rem 1rem;
}

.filter {
  font: inherit;
  font-size: .9rem;
  padding: .4rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .18s, color .18s, border-color .18s;
}

.filter:hover { border-color: var(--accent); color: var(--accent); }

.filter.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.sortbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 1.75rem;
  font-size: .82rem;
  color: var(--ink-soft);
}

.sort {
  font: inherit;
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--ink-soft);
  cursor: pointer;
  padding: .1rem .2rem;
}

.sort:hover { color: var(--accent); }
.sort.is-active { color: var(--ink); border-bottom-color: var(--accent); }

/* --- 図鑑グリッド --- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.card {
  font: inherit;
  color: inherit;
  text-align: center;
  position: relative;
  padding: 1.5rem 1rem 2.4rem;
  background: #fffdf7;
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 4px rgba(60, 44, 26, .1), 0 14px 32px rgba(60, 44, 26, .12);
}

.decade-head {
  grid-column: 1 / -1;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 2.5rem 0 .25rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--rule);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: .16em;
}

.decade-head:first-child { margin-top: 0; }
.decade-head small { font-size: .78rem; font-weight: 400; letter-spacing: .1em; color: var(--ink-soft); }

.card-figure { min-height: 140px; display: grid; place-items: center; }

/* すがたは固定サイズのSVGとして描かれるが、カードの幅に合わせて縮める。 */
.card-figure svg { width: 100%; height: auto; max-width: 140px; }
.card-name { margin: .7rem 0 .2rem; font-size: 1.22rem; letter-spacing: .08em; font-weight: 600; }
.card-meta { margin: 0; font-size: .78rem; color: var(--ink-soft); letter-spacing: .02em; }

/* --- 分類タグ --- */

.tag {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .12em;
  padding: .16rem .7rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  background: #fffdf7;
  /* 「絶滅危惧」がカード幅に負けて2行になるのを防ぐ。 */
  white-space: nowrap;
}

.card .tag { position: absolute; left: 50%; bottom: -.75rem; transform: translateX(-50%); }

.tag-絶滅     { color: #8a8175; }
.tag-絶滅危惧 { color: #9a6b30; }
.tag-衰退     { color: #a8794a; }
.tag-大繁殖   { color: #37704e; }
.tag-新種     { color: #2f6280; }
.tag-ぬし     { color: #6a4a86; }
.tag-常在     { color: var(--ink-soft); }

/* --- 詳細シート --- */

.back {
  display: block;
  margin: 1.5rem auto 0;
  font: inherit;
  font-size: .9rem;
  background: none;
  border: none;
  color: var(--ink-soft);
  cursor: pointer;
  padding: .4rem;
}

.back:hover { color: var(--accent); }
.back small { font-size: .74rem; opacity: .7; margin-left: .4rem; }

@media (hover: hover) { .back small { display: none; } }

.sheet {
  max-width: 720px;
  margin: 1rem auto 4rem;
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem);
  background: #fffdf7;
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: var(--shadow);
}

.sheet-head {
  display: flex;
  gap: 1.75rem;
  align-items: center;
  flex-wrap: wrap;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule);
}

.sheet-figure { flex: 0 0 auto; }
.sheet-head h2 { margin: .5rem 0 .4rem; font-size: 2rem; letter-spacing: .12em; font-weight: 600; }
.sheet-note { margin: 0; color: var(--ink-soft); font-size: .92rem; }

/* 語釈。図鑑の他の項目が会議録由来の事実なのに対し、ここだけは書き手の記述。
   紙の色を変えて出所の違いが分かるようにしている。 */
.gloss {
  margin: 1.75rem 0 0;
  padding: 1.1rem 1.35rem;
  background: var(--paper-deep);
  border-radius: 3px;
  position: relative;
}

.gloss p { margin: 0; font-size: .97rem; }

.gloss::after {
  content: "編集による説明";
  position: absolute;
  right: 1rem;
  bottom: -.6rem;
  font-size: .66rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
  background: #fffdf7;
  padding: 0 .5rem;
}

.correction {
  margin: 1.1rem 0 0;
  padding: .7rem 1rem;
  border-left: 3px solid #9a6b30;
  background: rgba(154, 107, 48, .07);
  font-size: .84rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.correction strong {
  display: block;
  color: #9a6b30;
  font-size: .74rem;
  letter-spacing: .1em;
  font-weight: 600;
}

.facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .55rem 1.5rem;
  margin: 1.75rem 0 0;
  font-size: .93rem;
}

.facts dt { color: var(--ink-soft); letter-spacing: .08em; white-space: nowrap; }
.facts dd { margin: 0; }

.sheet h3 {
  font-size: .85rem;
  letter-spacing: .18em;
  color: var(--ink-soft);
  font-weight: 600;
  margin: 2.5rem 0 .9rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--rule);
}

/* --- 会派 --- */

.party-bar {
  display: flex;
  height: 7px;
  margin: .9rem 0 0;
  border-radius: 999px;
  overflow: hidden;
  background: var(--paper-deep);
}

.party-bar span { display: block; height: 100%; }

.sheet .party-bar { height: 14px; margin-bottom: 1.2rem; }

.party-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: .25rem 1.5rem;
  font-size: .87rem;
}

.party-legend li { display: flex; align-items: center; gap: .55rem; }

.swatch {
  width: .72rem;
  height: .72rem;
  border-radius: 2px;
  flex: 0 0 auto;
}

.party-name { flex: 1 1 auto; }
.party-share { color: var(--ink-soft); font-variant-numeric: tabular-nums; font-size: .82rem; }

.party-chip {
  display: inline-block;
  font-size: .72rem;
  letter-spacing: .04em;
  padding: .05rem .5rem;
  border: 1px solid;
  border-radius: 999px;
  vertical-align: .1em;
  margin-left: .3rem;
}

.party-chip.is-plain { border-color: var(--rule); color: var(--ink-soft); }

.method {
  margin: 1.1rem 0 0;
  font-size: .76rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* --- 生息数グラフ --- */

.chart { display: block; color: var(--ink-soft); overflow: visible; }
.chart-area { fill: rgba(122, 92, 46, .16); }
.chart-line { stroke: var(--accent); stroke-width: 1.8; stroke-linejoin: round; }
.tick { font-size: 11px; fill: var(--ink-soft); font-family: system-ui, sans-serif; }

/* --- 引用 --- */

blockquote {
  margin: 0;
  padding: 1.1rem 1.4rem;
  background: var(--paper-deep);
  border-left: 3px solid var(--accent);
  font-size: 1rem;
}

.source { margin: .7rem 0 0; font-size: .8rem; color: var(--ink-soft); }
.source a { color: var(--accent); }

/* --- 補足 --- */

.empty, .error {
  text-align: center;
  color: var(--ink-soft);
  padding: 3rem 1.5rem;
  grid-column: 1 / -1;
}

.error code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--paper-deep);
  padding: .1rem .4rem;
  border-radius: 3px;
}

.colophon {
  border-top: 1px solid var(--rule);
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  font-size: .78rem;
  color: var(--ink-soft);
}

.colophon p { margin: .35rem 0; }
.colophon a { color: var(--accent); }
.caveat { max-width: 620px; margin: .6rem auto 0; line-height: 1.7; }

/* スマホ。1列だと1画面に1語しか入らず図鑑として見渡せないので、
   カードを詰めて3列にする。すがたと文字もそれに合わせて縮める。 */
@media (max-width: 600px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .55rem;
    padding: 0 .7rem 3rem;
  }

  .card { padding: .75rem .35rem 1.55rem; }
  .card-figure { min-height: 0; }
  .card-figure svg { max-width: 86px; }
  .card-name { margin: .45rem 0 .15rem; font-size: .88rem; letter-spacing: .02em; line-height: 1.35; }
  .card-meta { font-size: .62rem; line-height: 1.5; }
  /* 3列だとカードが106px程度になる。「絶滅危惧」4文字が収まる字送りまで詰める。 */
  .card .tag { font-size: .58rem; padding: .1rem .4rem; bottom: -.6rem; letter-spacing: .02em; }
  .card .party-bar { height: 5px; margin-top: .5rem; }

  .decade-head { margin: 1.75rem 0 .1rem; font-size: 1rem; gap: .6rem; }
  .decade-head small { font-size: .68rem; }

  .tabs { gap: 1.25rem; }
  .tab { font-size: .88rem; padding: .85rem .5rem .7rem; }

  .ranking-wrap { padding: 1.75rem .9rem 3rem; }
  .rank-block h2 { font-size: 1.1rem; }
  .rank-lead { font-size: .8rem; margin-bottom: 1.25rem; }
  .rank-row { gap: .6rem; padding: .75rem 0; }
  .rank-no { flex-basis: 1.25rem; font-size: .95rem; }
  .rank-party { font-size: .93rem; }
  .rank-count { font-size: .85rem; }
  .rank-words { font-size: .74rem; }

  .filters { padding: 1.25rem .7rem; gap: .35rem; }
  .filter { font-size: .78rem; padding: .3rem .8rem; }
  .sortbar { padding: 0 .7rem 1.25rem; font-size: .76rem; }
}

/* 極端に狭い端末では3列だと文字が潰れるので2列に落とす。 */
@media (max-width: 340px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-figure svg { max-width: 100px; }
}

@media (max-width: 480px) {
  .sheet-head { justify-content: center; text-align: center; }
  .facts { grid-template-columns: 1fr; gap: .1rem 0; }
  .facts dt { margin-top: .6rem; }
}