/* Noto Sans JP — Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. SIL Open Font License 1.1 (https://openfontlicense.org). マニュアルに出る字だけに絞っている。 */
@font-face { font-family: "Noto Sans JP"; font-style: normal; font-weight: 500; font-display: swap; src: url(fonts/noto-sans-jp-500.woff2?v=1b5e3a2856) format("woff2"); }
@font-face { font-family: "Noto Sans JP"; font-style: normal; font-weight: 700; font-display: swap; src: url(fonts/noto-sans-jp-700.woff2?v=9aa7ef7c67) format("woff2"); }

/* いろか マニュアル — docs/manual/build_manual.py が書体の指定を頭に足して manual.css として出す
   見た目は宣伝画像・紹介動画に揃える（dev_safe/promo/DESIGN.md）: 薄紫の地・墨の文字・Noto Sans JP・細い罫。
   実演の台は宣伝画像の写真の台紙と同じ紙の色。差し色は使わない（色は図版の中のものだけにする）。
   明暗は OS の設定に従う（data-theme は page.html と manual.js が当てる）。2026-10-17 までは紙の地・Zen Maru Gothic。 */

:root {
  color-scheme: light;
  --bg: #e9e9fa;           /* 宣伝画像の地と同じ薄紫（OKLCH 0.94 / 0.022 / 285） */
  --panel: #f7f6f4;        /* 宣伝画像の写真の台紙と同じ紙の色 */
  --panel-2: #dadaed;
  --line: #d0cfde;
  --line-soft: #dedeec;
  --rule: #1d1d1f;
  --fg: #1d1d1f;
  --fg-mid: #45423e;
  --fg-dim: #85827c;
  --fg-faint: #b0b0b9;
  --mark: #ebe1c3;
  --shade: rgba(29, 29, 31, .06);
  --radius: 10px;
  --w-toc: 252px;
  --w-read: 44rem;
  --head: 3.6rem;
  --pad: 2.5rem;           /* 本文の左右の余白 */
  --clip-gap: 1.25rem;     /* 幅の広い動画と目次・画面の端との間 */
  --font: "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;      /* スクロールバーや入力欄も暗い側に揃える */
  --bg: #13131a;           /* 薄紫と同じ色味の暗い地 */
  --panel: #191920;
  --panel-2: #22222a;
  --line: #32323b;
  --line-soft: #202027;
  --rule: #f0efec;
  --fg: #f0efec;
  --fg-mid: #c3c0ba;
  --fg-dim: #8f8c87;
  --fg-faint: #5c5a56;
  --mark: #3d3624;
  --shade: rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--head) + 1.2rem); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: .03em;
  /* 仮名を詰める（build_fonts.py が、書体にもとからある palt を宣伝画像と同じ規則のものに置き換えている） */
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--fg-faint);
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  transition: text-decoration-color .15s;
}
a:hover { text-decoration-color: var(--fg); }

code {
  font-family: var(--mono);
  font-size: .86em;
  letter-spacing: 0;
  font-feature-settings: normal;
  background: var(--panel-2);
  border-radius: 4px;
  padding: .1em .38em;
  white-space: nowrap;
}

.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--fg); color: var(--bg); padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; }

/* ── ヘッダー ───────────────────────────────────── */
.top {
  position: sticky; top: 0; z-index: 40;
  height: var(--head);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.5rem;
  background: var(--bg);
  border-bottom: 1px solid var(--line-soft);
}

.brand { display: flex; align-items: baseline; gap: .7rem; min-width: 0; white-space: nowrap; }
.brand .name { font-weight: 700; font-size: 1.08rem; letter-spacing: .02em; }
.brand .sub { color: var(--fg-dim); font-size: .8rem; letter-spacing: .04em; }
.brand .ver { color: var(--fg-faint); font-size: .74rem; letter-spacing: .06em; font-variant-numeric: tabular-nums; }

.tools { margin-left: auto; display: flex; align-items: center; gap: .5rem; }

.search { position: relative; }
.search input {
  width: 13rem; max-width: 40vw;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg);
  font: inherit; font-size: .84rem; letter-spacing: .04em;
  padding: .3rem .9rem .3rem 2rem;
  outline: none;
  transition: border-color .15s, width .2s;
}
.search input::placeholder { color: var(--fg-dim); }
.search input:focus { border-color: var(--fg); width: 17rem; }
.search::before {
  content: ""; position: absolute; left: .75rem; top: 50%; width: 11px; height: 11px;
  transform: translateY(-50%);
  border: 1.5px solid var(--fg-dim); border-radius: 50%;
  box-shadow: 5.5px 5.5px 0 -4.2px var(--fg-dim);
  pointer-events: none;
}
#q-clear {
  position: absolute; right: .35rem; top: 50%; transform: translateY(-50%);
  background: none; border: 0; color: var(--fg-dim); cursor: pointer;
  font-size: 1.05rem; line-height: 1; padding: .15rem .35rem; border-radius: 50%;
}
#q-clear:hover { color: var(--fg); }

.pill {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  border-radius: 999px;
  font: inherit; font-size: .76rem; font-weight: 700; letter-spacing: .1em;
  padding: .28rem .75rem;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.pill:hover { color: var(--fg); border-color: var(--fg); }
.pill.icon { padding: 0; width: 2rem; height: 2rem; display: grid; place-items: center; }
/* 明暗の切り替え: 半分塗った丸 */
#theme::before {
  content: ""; width: 12px; height: 12px; border-radius: 50%;
  border: 1.5px solid currentColor;
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
}
/* 目次: 3 本線 */
#menu::before {
  content: ""; width: 13px; height: 1.5px; background: currentColor;
  box-shadow: 0 -4.5px 0 currentColor, 0 4.5px 0 currentColor;
}
.pill.only-narrow { display: none; }

/* ── レイアウト ─────────────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: var(--w-toc) minmax(0, 1fr);
  align-items: start;
  max-width: 112rem;
  margin: 0 auto;
}

.toc {
  position: sticky; top: var(--head);
  height: calc(100vh - var(--head));
  overflow-y: auto; overscroll-behavior: contain;
  padding: 2.2rem .8rem 3rem 1.5rem;
  font-size: .84rem;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.toc li { margin: 0; padding-left: 0; }
.toc li::before { content: none; }
.toc > ol > li { margin-bottom: .2rem; }
.toc a {
  display: block; color: var(--fg-mid); text-decoration: none;
  padding: .24rem .6rem .24rem .7rem;
  border-left: 2px solid transparent;
  line-height: 1.55;
}
.toc a:hover { color: var(--fg); }
.toc a.cur { color: var(--fg); border-left-color: var(--rule); font-weight: 700; }
.toc .subs { margin: .05rem 0 .55rem; }
.toc .subs a { font-size: .78rem; color: var(--fg-dim); padding-left: 1.55rem; }
.toc .subs a:hover { color: var(--fg); }
.toc .subs a.cur { color: var(--fg); font-weight: 700; border-left-color: var(--fg-faint); }
.toc .num {
  color: var(--fg-faint); font-variant-numeric: tabular-nums;
  margin-right: .55rem; font-size: .76em; letter-spacing: .08em; font-weight: 700;
}
.toc a.cur .num { color: var(--fg-dim); }

main {
  /* 幅の広い動画は、この箱の幅（cqw）から大きさを決める */
  container-type: inline-size;
  padding: 3rem var(--pad) 6rem;
  min-width: 0;
}
.doc { max-width: var(--w-read); margin: 0 auto; }
.doc[hidden] { display: none; }

/* ── 表紙 ───────────────────────────────────────── */
.cover { max-width: var(--w-read); margin: .5rem auto 4.5rem; }
.cover[hidden] { display: none; }
/* 宣伝画像の右上と同じ、ふつうの字間の「いろか」（字間を広く空けた小見出しはやめた。DESIGN.md） */
.eyebrow {
  margin: 0; color: var(--fg-dim);
  font-size: .9rem; font-weight: 700; letter-spacing: .02em;
}
.cover h1 {
  margin: .5rem 0 .9rem;
  font-size: 2.7rem; line-height: 1.3; font-weight: 700; letter-spacing: .04em;
}
.cover .lead { margin: 0; color: var(--fg-dim); font-size: .95rem; }

/* 紹介動画。押すまでは手元のサムネイルで、押すと YouTube の埋め込みに差し替わる（manual.js） */
.yt { margin: 2.2rem 0 0; }
.yt-stage {
  position: relative; aspect-ratio: 16 / 9;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #000;
}
.yt-stage a, .yt-stage img, .yt-stage iframe { display: block; width: 100%; height: 100%; border: 0; }
.yt-stage img { object-fit: cover; }
.yt-stage a:focus-visible { outline-offset: -4px; }
.yt-play {
  position: absolute; left: 50%; top: 50%;
  width: 4.2rem; height: 4.2rem; margin: -2.1rem 0 0 -2.1rem;
  border-radius: 50%; background: rgba(29, 29, 31, .78);
  transition: background .15s;
}
.yt-play::after {
  content: ""; position: absolute; left: 50%; top: 50%; margin: -.75rem 0 0 -.45rem;
  border-style: solid; border-width: .75rem 0 .75rem 1.3rem;
  border-color: transparent transparent transparent #f7f6f4;
}
.yt-stage a:hover .yt-play, .yt-stage a:focus-visible .yt-play { background: #1d1d1f; }

/* ── 本文 ───────────────────────────────────────── */
.sec { border-top: 2px solid var(--rule); padding-top: 1.6rem; }
.sec + .sec { margin-top: 5.5rem; }
.sec[hidden] { display: none; }

h1, h2, h3, h4 { color: var(--fg); }
h2 {
  font-size: 2rem; line-height: 1.4; letter-spacing: .04em;
  margin: 0 0 1.8rem; font-weight: 700;
}
/* 章番号（宣伝画像の小さな見出しと同じ、字間を空けた灰色の数字） */
h2[data-num]::before {
  content: attr(data-num);
  display: block; margin-bottom: .55rem;
  color: var(--fg-dim); font-size: .78rem; letter-spacing: .2em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
h3 {
  font-size: 1.24rem; line-height: 1.5; margin: 3.2rem 0 .9rem; font-weight: 700;
  letter-spacing: .04em;
}
h4 { margin: 2.1rem 0 .4rem; font-size: 1rem; font-weight: 700; letter-spacing: .04em; }
h4.qa { margin-top: 2.3rem; }

p { margin: 0 0 1.1rem; color: var(--fg-mid); }
h4.qa + p, h4.term + p { margin-top: .15rem; }
strong { color: var(--fg); font-weight: 700; }

ul, ol { margin: 0 0 1.2rem; padding-left: 1.3rem; color: var(--fg-mid); }
li { margin: .35rem 0; }
li::marker { color: var(--fg-faint); }
li > p { margin: .25rem 0 .5rem; }
li ul { margin: .35rem 0 .5rem; }
/* 手順の番号は、いろかのウィンドウの ①②③ と同じ丸囲み */
ol { counter-reset: step; list-style: none; padding-left: 0; }
ol > li {
  position: relative; padding-left: 2.3rem; margin: 1rem 0;
}
ol > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: .28em;
  width: 1.5rem; height: 1.5rem; border-radius: 50%;
  border: 1.5px solid var(--fg); color: var(--fg);
  font-size: .76rem; font-weight: 700; line-height: calc(1.5rem - 3px); text-align: center;
  letter-spacing: 0; font-variant-numeric: tabular-nums;
}
ol ul { padding-left: 1.2rem; list-style: disc; }
ol ul > li { padding-left: 0; margin: .25rem 0; }
ol ul > li::before { content: none; }

blockquote {
  margin: 1.4rem 0; padding: .1rem 0 .1rem 1.15rem;
  border-left: 2px solid var(--line);
  color: var(--fg-dim); font-size: .93rem;
}
blockquote p { color: inherit; }
blockquote p:last-child { margin-bottom: 0; }

.table-wrap { margin: 1.2rem 0 1.8rem; overflow-x: auto; }
/* 表の頭に墨の罫（宣伝画像の仕様欄と同じ） */
table {
  border-collapse: collapse; width: 100%; font-size: .9rem; line-height: 1.75;
  margin: 1.2rem 0 1.8rem; border-top: 2px solid var(--rule);
}
.table-wrap table { margin: 0; }
th, td { text-align: left; padding: .65rem .9rem .65rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  color: var(--fg-dim); font-weight: 700; white-space: nowrap;
  font-size: .76rem; letter-spacing: .14em; padding-top: .8rem;
}
td { color: var(--fg-mid); }
td:first-child { color: var(--fg); white-space: nowrap; font-weight: 700; }

/* ── 図版 ───────────────────────────────────────── */
figure { margin: 1.8rem 0 2rem; }
figcaption {
  margin-top: .7rem; font-size: .82rem; color: var(--fg-dim); line-height: 1.7;
  text-align: center; text-wrap: pretty;
}

.figure { margin-left: auto; margin-right: auto; }
.figure .shot {
  display: block; width: 100%; padding: 0; border: 1px solid var(--line);
  background: var(--panel); border-radius: 8px; overflow: hidden;
  cursor: zoom-in;
}
.figure img { display: block; width: 100%; height: auto; }
.figure.wide { max-width: min(var(--w-read), 100%) !important; }

/* ── 実演デモ ───────────────────────────────────── */
.demo {
  margin: 1.8rem 0 2.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.1rem 1.1rem 1rem;
}
.demo-head { display: flex; align-items: center; gap: .75rem; margin: 0 0 .9rem; padding: 0 .1rem; text-align: left; }
.demo-title { font-size: .78rem; font-weight: 700; color: var(--fg-dim); letter-spacing: .14em; }

.viewtog { margin-left: auto; display: flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.viewtog button {
  background: none; border: 0; color: var(--fg-dim); font: inherit; font-size: .74rem;
  padding: .18rem .7rem; cursor: pointer;
}
.viewtog button.on { background: var(--fg); color: var(--bg); font-weight: 700; }

.stage {
  position: relative; aspect-ratio: 1 / 1; width: 100%;
  max-width: 23rem; margin: 0 auto;
  border-radius: 6px; overflow: hidden; background: #fff;
}
:root[data-theme="dark"] .stage { background: #f2f2f4; }
.stage .fr {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}

.slider { display: flex; align-items: center; gap: .85rem; margin-top: 1rem; padding: 0 .1rem; }
.slider .lab { font-size: .78rem; color: var(--fg-dim); white-space: nowrap; letter-spacing: .06em; }
.slider output {
  font-variant-numeric: tabular-nums; font-size: .86rem; font-weight: 700;
  color: var(--fg); min-width: 2.6rem; text-align: right;
}
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  flex: 1; height: 22px; background: none; cursor: pointer; margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 2px; border-radius: 1px; background: var(--line);
}
input[type="range"]::-moz-range-track { height: 2px; border-radius: 1px; background: var(--line); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; margin-top: -7px; border-radius: 50%;
  background: var(--fg); border: 3px solid var(--panel);
  box-shadow: 0 0 0 1px var(--fg);
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--fg); border: 3px solid var(--panel); box-shadow: 0 0 0 1px var(--fg);
}
input[type="range"]:focus-visible { outline: 2px solid var(--fg); outline-offset: 4px; border-radius: 4px; }

.swatches { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; padding: 0 .1rem; justify-content: center; }
.sw {
  display: inline-flex; align-items: center; gap: .4rem;
  background: transparent; border: 1px solid var(--line); border-radius: 999px;
  color: var(--fg-dim); font: inherit; font-size: .76rem; letter-spacing: .04em;
  padding: .18rem .75rem .18rem .32rem; cursor: pointer;
  transition: color .15s, border-color .15s;
}
.sw::before {
  content: ""; width: 14px; height: 14px; border-radius: 50%;
  background: var(--sw); box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .15);
}
.sw:hover { color: var(--fg); }
.sw.on { color: var(--fg); border-color: var(--fg); font-weight: 700; }

.demo-note { margin: .8rem .1rem 0; font-size: .8rem; color: var(--fg-dim); line-height: 1.7; }
.frame-tag { display: inline; }
.frame-tag .tag { display: none; }
.frame-tag .tag.on {
  display: inline-block; margin-right: .6rem;
  color: var(--fg); font-weight: 700;
}

/* ── 変更前 / 変更後 ────────────────────────────── */
.ba { margin: 1.8rem 0 2.2rem; }
.ba-stage {
  position: relative; aspect-ratio: 1 / 1; width: 100%;
  max-width: 26rem; margin: 0 auto;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: #fff; touch-action: none; user-select: none;
  --p: 50%;
}
.ba-stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
/* 変更前を左側だけ残す。幅を変えず切り抜くので、左右で被写体の位置がずれない。 */
.ba-before { clip-path: inset(0 calc(100% - var(--p)) 0 0); }
.ba-handle {
  position: absolute; top: 0; bottom: 0; left: var(--p); width: 2px;
  background: rgba(255, 255, 255, .95); transform: translateX(-1px); cursor: ew-resize;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .14);
}
.ba-handle span {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 32px; height: 32px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 6px rgba(0, 0, 0, .22);
}
.ba-handle span::before, .ba-handle span::after {
  content: ""; position: absolute; top: 50%; width: 0; height: 0;
  border: 4.5px solid transparent;
}
.ba-handle span::before { left: 4px; border-right-color: #1d1d1f; transform: translateY(-50%); }
.ba-handle span::after { right: 4px; border-left-color: #1d1d1f; transform: translateY(-50%); }
.ba-handle:focus-visible { outline: 2px solid var(--fg); }
.ba-tag {
  position: absolute; top: .55rem; font-size: .7rem; font-weight: 700; letter-spacing: .1em;
  background: rgba(29, 29, 31, .7); color: #fff; padding: .1rem .55rem; border-radius: 999px;
  pointer-events: none;
}
.ba-tag.left { left: .6rem; }
.ba-tag.right { right: .6rem; }

/* ── 検索 ───────────────────────────────────────── */
mark { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 .1em; }
.no-hit {
  max-width: var(--w-read); margin: 2rem auto; padding: 1.5rem;
  border: 1px dashed var(--line); border-radius: var(--radius);
  color: var(--fg-dim); text-align: center; font-size: .9rem;
}

/* ── 画像ズーム ─────────────────────────────────── */
.zoom {
  position: fixed; inset: 0; z-index: 60; display: grid; place-items: center;
  background: rgba(17, 17, 20, .86);
  padding: 2rem; cursor: zoom-out;
}
.zoom[hidden] { display: none; }
.zoom img { max-width: 100%; max-height: 100%; border-radius: 8px; }

/* ── フッター ───────────────────────────────────── */
.foot {
  max-width: var(--w-read); margin: 6rem auto 0; padding-top: 1.6rem;
  border-top: 1px solid var(--line); color: var(--fg-dim); font-size: .8rem;
}
.foot p { color: inherit; margin-bottom: .6rem; }
.foot-links { display: flex; gap: 1.4rem; }
.foot-links a { color: var(--fg-mid); }
.foot-font { color: var(--fg-faint) !important; font-size: .74rem; }

/* ── 動画 ───────────────────────────────────────── */
.clip { margin: 1.8rem auto 2.1rem; }
/* 操作の動画は UI の文字が小さいので、本文の幅を越えて元の大きさまで広げる。
   広げる先は本文の箱（main）の中だけ。画面の幅（100vw）から決めると、広い画面で本文の列が
   中央に寄ったときに左の目次へかぶる。 */
.clip.wide {
  width: min(var(--clip-w), 100%);
  width: min(var(--clip-w), calc(100cqw + 2 * var(--pad) - 2 * var(--clip-gap)));
  position: relative; left: 50%; transform: translateX(-50%);
  margin-left: 0; margin-right: 0;
}
.clip.wide figcaption { max-width: var(--w-read); margin-left: auto; margin-right: auto; }
.clip-stage {
  width: 100%; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; background: #000;
}
.clip video { display: block; width: 100%; height: 100%; object-fit: contain; background: #000; }

/* ── 狭い画面 ───────────────────────────────────── */
@media (max-width: 900px) {
  :root { --w-toc: 0px; --pad: 1.2rem; --clip-gap: .6rem; }
  .pill.only-narrow { display: grid; }
  .layout { grid-template-columns: minmax(0, 1fr); }
  .toc {
    position: fixed; top: var(--head); bottom: 0; width: min(19rem, 84vw);
    left: calc(-1 * min(19rem, 84vw) - 8px);
    background: var(--bg); border-right: 1px solid var(--line);
    transition: left .22s ease;
    z-index: 45; padding: 1.4rem 1rem 3rem; height: auto;
  }
  .toc.open { left: 0; box-shadow: 8px 0 24px var(--shade); }
  main { padding-top: 2rem; padding-bottom: 5rem; }
  .figure.wide { margin-left: 0; margin-right: 0; }
  .search input { width: 8.5rem; }
  .search input:focus { width: 11rem; }
  .brand .sub, .brand .ver { display: none; }
  .cover h1 { font-size: 2.2rem; }
  h2 { font-size: 1.6rem; }
}

@media (max-width: 520px) {
  body { font-size: 15.5px; }
  .top { padding: 0 1rem; }
  .demo { padding: .8rem; }
  td:first-child { white-space: normal; }
  code { white-space: normal; overflow-wrap: anywhere; }
}