/* ---------- トークン ---------- */
:root {
  color-scheme: light;
  --bg: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --strong: #2a78d6;
  --weak: #eb6834;
  --weak-2: #f6b797;
  --seq-1: #1c5cab;
  --seq-2: #3987e5;
  --seq-3: #86b6ef;
  --seq-4: #cde2fb;
  --informed: #6250d6;
  --cut: #e34948;
  --good: #006300;
  --node-fill: #ffffff;
  --node-stroke: #52514e;
  --hull: #eeede8;
  --hull-line: #e1e0d9;
  --focus: #2a78d6;
  --font: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #262624;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --strong: #3987e5;
    --weak: #d95926;
    --weak-2: #f3a98a;
    --seq-1: #2a78d6;
    --seq-2: #5598e7;
    --seq-3: #86b6ef;
    --seq-4: #b7d3f6;
    --informed: #9085e9;
    --cut: #e66767;
    --good: #0ca30c;
    --node-fill: #2a2a28;
    --node-stroke: #c3c2b7;
    --hull: #222221;
    --hull-line: #2c2c2a;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #262624;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --strong: #3987e5;
  --weak: #d95926;
  --weak-2: #f3a98a;
  --seq-1: #2a78d6;
  --seq-2: #5598e7;
  --seq-3: #86b6ef;
  --seq-4: #b7d3f6;
  --informed: #9085e9;
  --cut: #e66767;
  --good: #0ca30c;
  --node-fill: #2a2a28;
  --node-stroke: #c3c2b7;
  --hull: #222221;
  --hull-line: #2c2c2a;
}

/* ---------- ベース ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  font-feature-settings: "palt";
}
h1, h2, h3 { line-height: 1.35; margin: 0 0 0.5em; letter-spacing: 0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; }
h2 { font-size: 1.45rem; font-weight: 700; }
h3 { font-size: 1.05rem; font-weight: 700; margin-top: 1.2em; }
p { margin: 0 0 1em; }
a { color: var(--strong); }
em { font-style: normal; font-weight: 600; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* ---------- ヘッダー ---------- */
.site-header { padding: 48px 0 28px; border-bottom: 1px solid var(--grid); background: var(--surface); }
.header-inner { display: flex; gap: 24px; align-items: flex-start; justify-content: space-between; }
.eyebrow { color: var(--muted); font-size: 0.85rem; letter-spacing: 0.08em; margin-bottom: 0.4em; }
.lead { color: var(--ink-2); font-size: 1.05rem; max-width: 46em; margin-bottom: 0; }

/* ---------- 目次 ---------- */
.toc { display: flex; flex-wrap: wrap; gap: 6px 10px; margin: 20px 0 0; padding: 0; list-style: none; font-size: 0.88rem; }
.toc a { display: inline-block; padding: 5px 11px; border: 1px solid var(--grid); border-radius: 999px; color: var(--ink-2); text-decoration: none; background: var(--surface); }
.toc a:hover { border-color: var(--axis); color: var(--ink); }
.toc .toc-num { color: var(--weak); font-weight: 700; margin-right: 4px; }
.toc .toc-video { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.toc .toc-video:hover { color: var(--surface); opacity: 0.88; }

/* ---------- 論文の要点 ---------- */
.paper-meta { color: var(--ink-2); font-size: 0.95rem; }
.outline { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 6px; font-size: 0.93rem; }
.outline li { display: grid; grid-template-columns: 9em 1fr; gap: 12px; padding: 8px 0; border-top: 1px solid var(--grid); color: var(--ink-2); }
.outline li b { color: var(--ink); font-weight: 600; }
.outline .pg { display: block; color: var(--muted); font-size: 0.82rem; }
.chain { counter-reset: step; list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 8px; }
.chain li { position: relative; padding: 10px 12px 10px 44px; background: var(--surface-2); border-radius: 10px; font-size: 0.93rem; color: var(--ink-2); }
.chain li::before { counter-increment: step; content: counter(step); position: absolute; left: 12px; top: 10px; width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: var(--surface); font-size: 0.8rem; font-weight: 700; display: grid; place-items: center; }
.chain li b { color: var(--ink); }
.chain li a { color: var(--strong); font-size: 0.85rem; white-space: nowrap; margin-left: 6px; }
.quote { margin: 12px 0; padding: 12px 16px; border-left: 3px solid var(--weak); background: var(--surface-2); border-radius: 0 10px 10px 0; color: var(--ink-2); font-size: 0.93rem; }
.quote p { margin: 0 0 0.4em; }
.quote cite { display: block; font-style: normal; color: var(--muted); font-size: 0.82rem; }
.evidence { margin-top: 20px; padding: 16px 18px; border: 1px dashed var(--axis); border-radius: 12px; }
.evidence h3 { margin-top: 0; font-size: 0.98rem; }
.evidence ul { margin: 0; padding-left: 1.2em; font-size: 0.92rem; color: var(--ink-2); }
.evidence li { margin-bottom: 0.4em; }
.grid-2-even { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; margin-top: 16px; }
.card .pg { color: var(--muted); font-size: 0.8rem; }

/* ---------- カード ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 32px 0; }
.card { background: var(--surface); border: 1px solid var(--grid); border-radius: 12px; padding: 20px 20px 8px; }
.card h2 { font-size: 1.1rem; margin-top: 8px; }
.card p { color: var(--ink-2); font-size: 0.95rem; }
.mini { width: 100%; height: 90px; display: block; }
.mini .e-strong, .mini .e-strong line { stroke: var(--strong); stroke-width: 3.5; stroke-linecap: round; }
.mini .e-weak { stroke: var(--weak); stroke-width: 1.8; stroke-linecap: round; }
.mini .e-missing { stroke: var(--axis); stroke-width: 1.5; stroke-dasharray: 4 5; }
.mini .nd, .mini .nd-group circle { fill: var(--node-fill); stroke: var(--node-stroke); stroke-width: 1.5; }
.mini-label { fill: var(--ink-2); font-size: 12px; text-anchor: middle; font-weight: 600; }

/* ---------- パネル ---------- */
.panel { background: var(--surface); border: 1px solid var(--grid); border-radius: 14px; padding: 28px 24px; margin: 0 0 28px; }
.panel-head { max-width: 52em; margin-bottom: 20px; }
.panel-head p:last-child { color: var(--ink-2); margin-bottom: 0; }
.step { color: var(--weak); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.1em; margin-bottom: 0.2em; }
.grid-2 { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 24px; align-items: start; margin-top: 16px; }
.grid-2-rev { grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); margin-top: 28px; }
.prose-sm p { color: var(--ink-2); font-size: 0.95rem; }
.prose-sm h3:first-child { margin-top: 0; }

/* ---------- コントロール ---------- */
.controls { display: flex; flex-direction: column; gap: 12px; }
.ctl { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; font-size: 0.9rem; color: var(--ink-2); }
.ctl > span { grid-column: 1 / -1; }
.ctl input[type=range] { width: 100%; accent-color: var(--strong); margin: 0; }
.ctl-full input { grid-column: 1 / -1; }
.ctl output { min-width: 3.5em; text-align: right; color: var(--ink); font-variant-numeric: tabular-nums; }
.ctl-seed input, .ctl-select select {
  grid-column: 1 / -1; font: inherit; padding: 6px 10px; border: 1px solid var(--axis); border-radius: 8px;
  background: var(--surface); color: var(--ink);
}
.more { border-top: 1px solid var(--grid); padding-top: 8px; }
.more summary { cursor: pointer; color: var(--ink-2); font-size: 0.9rem; }
.more[open] summary { margin-bottom: 10px; }
.more .ctl { margin-bottom: 10px; }
.hint, .status { color: var(--muted); font-size: 0.85rem; margin: 0; }
.status { min-height: 1.5em; color: var(--ink-2); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  font: inherit; font-size: 0.9rem; padding: 8px 14px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--axis); background: var(--surface); color: var(--ink);
}
.btn:hover { background: var(--surface-2); }
.btn:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.btn-primary { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.btn-primary:hover { opacity: 0.88; background: var(--ink); }
.btn-ghost { white-space: nowrap; }
.opts, .opt-line { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.9rem; color: var(--ink-2); }
.opts label, .opt-line { display: inline-flex; align-items: center; gap: 6px; }
input[type=checkbox], input[type=radio] { accent-color: var(--strong); width: 16px; height: 16px; margin: 0; }
.radios { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; color: var(--ink-2); }
.radios legend { font-weight: 600; color: var(--ink); padding: 0; margin-bottom: 4px; }
.radios label { display: inline-flex; align-items: center; gap: 8px; }
.readout { margin: 4px 0 0; display: grid; gap: 6px; font-size: 0.9rem; }
.readout div { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid var(--grid); padding-top: 6px; }
.readout dt { color: var(--ink-2); }
.readout dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- ネットワーク描画 ---------- */
.net-wrap { position: relative; background: var(--surface); border: 1px solid var(--grid); border-radius: 12px; overflow: hidden; min-width: 0; }
.net-wrap canvas { display: block; width: 100%; touch-action: pan-y pinch-zoom; }
.net-tip, .chart-tip {
  position: absolute; z-index: 5; pointer-events: none;
  background: var(--surface); color: var(--ink); border: 1px solid var(--axis); border-radius: 8px;
  padding: 8px 10px; font-size: 0.82rem; line-height: 1.5; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12); max-width: 260px;
}
.legend-net, .chart-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.85rem; color: var(--ink-2); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.swatch { display: inline-block; width: 16px; height: 3px; border-radius: 2px; vertical-align: middle; }
.swatch-block { width: 12px; height: 12px; border-radius: 3px; }
.sw-strong { background: var(--strong); height: 3px; }
.sw-weak { background: var(--weak); height: 2px; }

/* ---------- 統計タイル ---------- */
.stats, .tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-top: 20px; }
.tiles { margin-top: 12px; }
.tile { background: var(--surface-2); border-radius: 10px; padding: 12px 14px; border-top: 3px solid transparent; }
.tile-label { color: var(--ink-2); font-size: 0.8rem; line-height: 1.4; }
.tile-value { font-size: 1.45rem; font-weight: 600; line-height: 1.3; margin-top: 4px; }
.tile-sub { color: var(--muted); font-size: 0.78rem; line-height: 1.4; margin-top: 2px; }
.tile-good .tile-value { color: var(--good); }
.tile-all { border-top-color: var(--ink-2); }
.tile-strong { border-top-color: var(--strong); }
.tile-weak { border-top-color: var(--weak); }
.claim { margin: 14px 0 0; padding: 10px 14px; background: var(--surface-2); border-radius: 10px; font-size: 0.95rem; min-height: 1.5em; }
.claim:empty { display: none; }

/* ---------- チャート ---------- */
.chart { position: relative; min-width: 0; }
.chart-plot svg { display: block; width: 100%; height: auto; font-family: var(--font); }
.chart .grid { stroke: var(--grid); stroke-width: 1; }
.chart .ax { stroke: var(--axis); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart .axis-title { fill: var(--muted); font-size: 11px; }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .dot { stroke: var(--surface); stroke-width: 2; }
.chart .dot-soft { fill-opacity: 0.75; }
.chart .end-label { fill: var(--ink-2); font-size: 12px; font-weight: 600; }
.chart .leader { stroke: var(--axis); stroke-width: 1; }
.chart .crosshair { stroke: var(--axis); stroke-width: 1; }
.chart .marker { stroke: var(--axis); stroke-width: 1; stroke-dasharray: 2 3; }
.chart .marker-label { paint-order: stroke; stroke: var(--surface); stroke-width: 3px; stroke-linejoin: round; }
.chart-legend { margin-top: 6px; }
.chart-tip .tip-head { font-weight: 600; margin-bottom: 4px; }
.chart-tip .tip-row { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.chart-tip .tip-row b { margin-left: auto; padding-left: 10px; font-variant-numeric: tabular-nums; }
.chart-table { margin-top: 8px; font-size: 0.85rem; }
.chart-table summary { cursor: pointer; color: var(--ink-2); }

/* ---------- 分割バー ---------- */
.bars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 24px; }
.bar-block h3 { font-size: 0.95rem; margin: 0 0 8px; }
.segbar-wrap { display: flex; flex-direction: column; gap: 8px; }
.segbar { display: flex; height: 28px; gap: 2px; width: 100%; }
.seg { display: flex; align-items: center; padding-left: 8px; border-radius: 4px; min-width: 2px; color: #fff; font-size: 0.82rem; font-weight: 600; overflow: visible; }
.seg-dark { color: #0b0b0b; }
.seg-label { white-space: nowrap; }
.seg-empty { color: var(--muted); font-size: 0.85rem; align-self: center; }

/* ---------- 表 ---------- */
table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--grid); vertical-align: top; }
th { color: var(--ink-2); font-weight: 600; white-space: nowrap; }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td .swatch { margin-right: 6px; width: 12px; height: 12px; border-radius: 3px; }
.table-wrap { overflow-x: auto; }

/* ---------- 解説 ---------- */
.prose li { margin-bottom: 0.4em; }
.prose p, .prose li { color: var(--ink-2); }
.prose strong { color: var(--ink); }
.refs { font-size: 0.9rem; }

.site-footer { padding: 24px 0 40px; color: var(--muted); font-size: 0.85rem; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .grid-2, .grid-2-rev, .grid-2-even { grid-template-columns: 1fr; }
  .outline li { grid-template-columns: 1fr; gap: 2px; }
  .bars { grid-template-columns: 1fr; }
  .panel { padding: 22px 16px; }
  .header-inner { flex-direction: column-reverse; align-items: flex-start; }
  .site-header { padding-top: 24px; }
}
@media (max-width: 600px) {
  .net-wrap { overflow-x: auto; }
  .net-wrap canvas { min-width: 560px; }
  .net-wrap { -webkit-overflow-scrolling: touch; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}