:root {
  --bg: #ffffff;
  --panel: #f7f8fa;
  --line: #e6e8ec;
  --ink: #0f1115;
  --ink-2: #5b6474;
  --ink-3: #8b93a3;
  --accent: #2563eb;
  --accent-soft: #eff5ff;
  --radius: 14px;
  --rail: 250px;
  --gap: 28px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d0f13;
    --panel: #15181e;
    --line: #262b34;
    --ink: #f2f4f7;
    --ink-2: #a3acbb;
    --ink-3: #737c8c;
    --accent: #6f9bff;
    --accent-soft: #182236;
  }
}
:root[data-theme="dark"] {
  --bg: #0d0f13;
  --panel: #15181e;
  --line: #262b34;
  --ink: #f2f4f7;
  --ink-2: #a3acbb;
  --ink-3: #737c8c;
  --accent: #6f9bff;
  --accent-soft: #182236;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  word-break: auto-phrase;
}

a { color: inherit; }

/* ---------- 3カラム ---------- */
.layout {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) var(--rail);
  gap: var(--gap);
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px;
  align-items: start;
}
.rail { display: grid; gap: 16px; position: sticky; top: 20px; }

.rail-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  background: var(--panel);
}
.rail-card h2 {
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 10px;
}
.rail-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.rail-list button {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  border-radius: 8px;
  padding: 6px 8px;
  font: inherit;
  color: var(--ink-2);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.rail-list button:hover { background: var(--bg); color: var(--ink); }
.rail-list button[aria-current="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.rail-list .count { color: var(--ink-3); font-variant-numeric: tabular-nums; }
.rail-card p { margin: 0; color: var(--ink-2); font-size: 13px; }
.rail-card p + p { margin-top: 8px; }

/* ---------- ヘッダー ---------- */
.head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.brand { font-size: 19px; font-weight: 700; letter-spacing: -.02em; text-decoration: none; }
.head nav { margin-left: auto; display: flex; gap: 20px; flex-wrap: wrap; }
.head nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; }
.head nav a:hover { color: var(--ink); }

.icon-btn, .pill-btn {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
}
.icon-btn { width: 36px; height: 36px; display: grid; place-items: center; }
.pill-btn { padding: 7px 16px; font-size: 14px; font-weight: 600; text-decoration: none; }
.icon-btn:hover, .pill-btn:hover { border-color: var(--ink-3); }

/* ---------- ヒーロー ---------- */
.eyebrow { color: var(--accent); font-size: 14px; margin: 0 0 10px; }
.eyebrow a { color: inherit; }
h1 {
  font-size: clamp(32px, 4.4vw, 54px);
  line-height: 1.15;
  letter-spacing: -.03em;
  margin: 0 0 12px;
  font-weight: 700;
}
.lede { color: var(--ink-2); font-size: 16px; margin: 0 0 28px; max-width: 38em; }

.notice {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--ink-2);
  margin-bottom: 28px;
}
.notice strong { color: var(--ink); }

/* ---------- フィルタ ---------- */
.filters {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}
.filters input[type="search"] {
  flex: 1 1 200px;
  min-width: 140px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  color: var(--ink);
  font: inherit;
  padding: 6px 2px;
}
.filters input[type="search"]:focus { outline: none; border-bottom-color: var(--accent); }
.filters select {
  border: 0;
  background: none;
  color: var(--ink-2);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  padding: 4px;
}
.view-toggle { display: flex; gap: 2px; margin-left: auto; }
.view-toggle button {
  border: 0; background: none; font: inherit; font-size: 14px;
  color: var(--ink-2); cursor: pointer; padding: 4px 8px; border-radius: 7px;
}
.view-toggle button[aria-pressed="true"] { color: var(--ink); font-weight: 600; background: var(--panel); }

/* ---------- カテゴリのピル ---------- */
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  padding: 1px 10px;
  border-radius: 7px;
  white-space: nowrap;
}
.tone-blue   { background: #e8efff; color: #1d4ed8; }
.tone-green  { background: #e4f6ea; color: #15803d; }
.tone-orange { background: #fdeee2; color: #c2410c; }
.tone-indigo { background: #ecebfe; color: #4f46e5; }
.tone-pink   { background: #fce9f1; color: #be185d; }
.tone-amber  { background: #fdf3d8; color: #a16207; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tone-blue   { background: #17243f; color: #93b4ff; }
  :root:not([data-theme="light"]) .tone-green  { background: #14291c; color: #86dfa5; }
  :root:not([data-theme="light"]) .tone-orange { background: #331e13; color: #fdba8c; }
  :root:not([data-theme="light"]) .tone-indigo { background: #1f1d3d; color: #a5a0fb; }
  :root:not([data-theme="light"]) .tone-pink   { background: #331424; color: #f8a8cd; }
  :root:not([data-theme="light"]) .tone-amber  { background: #2e2510; color: #ecc35c; }
}
:root[data-theme="dark"] .tone-blue   { background: #17243f; color: #93b4ff; }
:root[data-theme="dark"] .tone-green  { background: #14291c; color: #86dfa5; }
:root[data-theme="dark"] .tone-orange { background: #331e13; color: #fdba8c; }
:root[data-theme="dark"] .tone-indigo { background: #1f1d3d; color: #a5a0fb; }
:root[data-theme="dark"] .tone-pink   { background: #331424; color: #f8a8cd; }
:root[data-theme="dark"] .tone-amber  { background: #2e2510; color: #ecc35c; }

.chip {
  display: inline-block;
  font-size: 12px;
  color: var(--ink-2);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 7px;
  margin: 2px 4px 2px 0;
  white-space: nowrap;
}

/* ---------- テーブル ---------- */
.table-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
table { width: 100%; border-collapse: separate; border-spacing: 0; }
thead th {
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  background: var(--panel);
  padding: 11px 16px;
  border-bottom: 1px solid var(--line);
}
tbody td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr { cursor: pointer; }
tbody tr:hover td { background: var(--panel); }
.bot-name { font-weight: 600; }
.col-use { color: var(--ink-2); font-size: 14px; }
.table-label { display: none; }

/* ---------- カード ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background: var(--bg);
  cursor: pointer;
  display: grid;
  gap: 8px;
  align-content: start;
  text-align: left;
  font: inherit;
  color: inherit;
}
.card:hover { border-color: var(--ink-3); }
.card h3 { margin: 0; font-size: 16px; }
.card p { margin: 0; color: var(--ink-2); font-size: 14px; }

.empty { padding: 48px 0; text-align: center; color: var(--ink-3); }
.result-count { color: var(--ink-3); font-size: 13px; margin: 18px 0 0; }

/* ---------- 詳細ダイアログ ---------- */
dialog {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  padding: 0;
  width: min(680px, calc(100vw - 32px));
  max-height: 85vh;
}
dialog::backdrop { background: rgba(10, 12, 16, .5); }
.dlg-head { padding: 22px 24px 14px; border-bottom: 1px solid var(--line); }
.dlg-head h2 { margin: 0 0 8px; font-size: 21px; letter-spacing: -.02em; }
.dlg-body { padding: 20px 24px 24px; }
.dlg-body h3 { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 8px; }
.prompt-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.85;
  margin: 0 0 14px;
  max-height: 40vh;
  overflow: auto;
}
.dlg-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.btn {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 16px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn:hover { border-color: var(--ink-3); }
.btn--primary:hover { filter: brightness(1.06); border-color: var(--accent); }
.copied { color: var(--ink-3); font-size: 13px; }

/* ---------- フッター ---------- */
footer {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding: 28px 0 12px;
  color: var(--ink-3);
  font-size: 13px;
}
footer nav { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 12px; }
footer a { color: var(--ink-2); text-decoration: none; }
footer a:hover { color: var(--ink); }
footer p { margin: 0 0 6px; max-width: 60em; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 1180px) {
  .layout { grid-template-columns: var(--rail) minmax(0, 1fr); }
  .rail--right { display: none; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); padding: 16px; }
  .rail { position: static; order: 2; }
  main { order: 1; }
  .head { margin-bottom: 32px; }
  .head nav { order: 3; width: 100%; margin-left: 0; }

  thead { display: none; }
  table, tbody, tr, td { display: block; }
  .table-wrap { border: 0; border-radius: 0; }
  tbody tr {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-bottom: 12px;
    padding: 6px 0;
  }
  tbody td { border-bottom: 0; padding: 5px 16px; display: flex; gap: 10px; }
  .table-label { display: inline; color: var(--ink-3); font-size: 13px; min-width: 5em; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---------- 記事セクション ---------- */
main section { margin-top: 56px; max-width: 46em; }
main section h2 {
  font-size: 22px;
  letter-spacing: -.02em;
  margin: 0 0 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
main section p { color: var(--ink-2); margin: 0 0 12px; }
main section ul, main section ol { color: var(--ink-2); margin: 0 0 12px; padding-left: 1.4em; }
main section li { margin-bottom: 6px; }
main section strong { color: var(--ink); }
main section a { color: var(--accent); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

#d-meta { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }

/* ---------- 指示文の言語タブ ---------- */
.lang-tabs { display: flex; gap: 4px; margin: 0 0 10px; }
.lang-tabs button {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-2);
  border-radius: 8px;
  padding: 4px 14px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.lang-tabs button[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.lang-note { margin: -6px 0 12px; font-size: 12px; color: var(--ink-3); }
.lang-note:empty { display: none; }

/* ---------- レールのカードに淡い色味を持たせる ---------- */
.rail-card:nth-child(3n+1) { background: color-mix(in srgb, var(--accent) 5%, var(--panel)); }
.rail-card:nth-child(3n+2) { background: color-mix(in srgb, #7c5cff 5%, var(--panel)); }
.rail-card:nth-child(3n+3) { background: color-mix(in srgb, #12a150 5%, var(--panel)); }