/* Samurai 3 user manual — offline, no network requests. */
@font-face { font-family: "Google Sans Flex"; font-weight: 400; font-display: swap; src: url("../fonts/google-sans-flex-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Google Sans Flex"; font-weight: 500; font-display: swap; src: url("../fonts/google-sans-flex-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Google Sans Flex"; font-weight: 600; font-display: swap; src: url("../fonts/google-sans-flex-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Google Sans Flex"; font-weight: 700; font-display: swap; src: url("../fonts/google-sans-flex-latin-700-normal.woff2") format("woff2"); }

:root {
  --bg: #fbfaf7;
  --photo-bg: radial-gradient(ellipse at 50% 42%, #3a3e46 0%, #1e2025 58%, #0e0f11 100%);
  --surface: #ffffff;
  --surface-2: #f4f2ee;
  --ink: #17191e;
  --ink-2: #353a45;
  --muted: #646b78;
  --line: #e4e0d8;
  --line-2: #d4cfc5;
  --accent: #2456d3;
  --accent-ink: #1d47b0;
  --accent-soft: #e9efff;
  --marker: #ff4f2e;
  --marker-ink: #ffffff;
  --note: #2456d3;      --note-soft: #edf2ff;
  --tip: #0f8a5f;       --tip-soft: #e8f6ef;
  --caution: #b86e00;   --caution-soft: #fff5e1;
  --warning: #c62c2c;   --warning-soft: #fdecec;
  --important: #7a3fd0; --important-soft: #f3ecff;
  --code-bg: #f1eee8;
  --kbd-bg: #ffffff;
  --shadow: 0 1px 2px rgba(24, 22, 18, .06), 0 6px 22px rgba(24, 22, 18, .06);
  /* drawing palette */
  --dg-ink: #1d2129; --dg-muted: #6b7280; --dg-line: #9aa1ad; --dg-grid: #e3e0da;
  --dg-surface: #ffffff; --dg-panel: #f5f3ef;
  --dg-blue: #2563eb; --dg-blue-soft: #dbe6ff;
  --dg-green: #0f9f6e; --dg-green-soft: #d4f3e6;
  --dg-amber: #d98a00; --dg-amber-soft: #fdefcf;
  --dg-red: #dc3a3a; --dg-red-soft: #fde0e0;
  --dg-violet: #7c4ddb; --dg-violet-soft: #ece3ff;
  --dg-cyan: #0891b2; --dg-cyan-soft: #d3f1f7;
  --dg-steel: #c9ced6; --dg-steel-2: #aab1bc; --dg-steel-3: #7d8591;
  --dg-resin: #d8b37a; --dg-resin-2: #b98d4c; --dg-tissue: #8a5a2b;
  --dg-dark: #1b1e24; --dg-screen: #0d0f13;
  color-scheme: light;
  --font-latin: "Google Sans Flex", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font: var(--font-latin);
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Roboto Mono", monospace;
}
:root:lang(ja) { --font: "Google Sans Flex", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Meiryo UI", Meiryo, "Noto Sans JP", "Noto Sans CJK JP", sans-serif; }
:root:lang(zh-Hans) { --font: "Google Sans Flex", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", "Noto Sans CJK SC", "Hiragino Sans GB", "Source Han Sans SC", sans-serif; }

:root[data-theme="dark"] {
  --bg: #0f1115; --surface: #161920; --surface-2: #1b1f28;
  --ink: #e9ebf0; --ink-2: #c8ccd6; --muted: #9aa2b1; --line: #272c37; --line-2: #343a47;
  --accent: #7ea5ff; --accent-ink: #a9c2ff; --accent-soft: #1b2440;
  --note: #7ea5ff; --note-soft: #172038; --tip: #4fd1a1; --tip-soft: #10261f; --caution: #f0b24a; --caution-soft: #2a2110;
  --warning: #ff7b7b; --warning-soft: #2e1515; --important: #b894ff; --important-soft: #221a36;
  --code-bg: #1d212b; --kbd-bg: #20242e; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.35);
  --dg-ink: #e6e9ef; --dg-muted: #a1a9b7; --dg-line: #6e7686; --dg-grid: #2a2f3a; --dg-surface: #1a1e27; --dg-panel: #20252f;
  --dg-blue: #7ea5ff; --dg-blue-soft: #1d2a4d; --dg-green: #4fd1a1; --dg-green-soft: #14322a; --dg-amber: #f3b54f; --dg-amber-soft: #36290f;
  --dg-red: #ff7a7a; --dg-red-soft: #3a1b1b; --dg-violet: #b894ff; --dg-violet-soft: #2a2143; --dg-cyan: #5fd4ec; --dg-cyan-soft: #123037;
  --dg-steel: #5a616d; --dg-steel-2: #4a505b; --dg-steel-3: #8e96a3; --dg-resin: #b58c52; --dg-resin-2: #8f6a37; --dg-tissue: #d9a36a;
  --dg-dark: #0b0d10; --dg-screen: #07080a;
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115; --surface: #161920; --surface-2: #1b1f28;
    --ink: #e9ebf0; --ink-2: #c8ccd6; --muted: #9aa2b1; --line: #272c37; --line-2: #343a47;
    --accent: #7ea5ff; --accent-ink: #a9c2ff; --accent-soft: #1b2440;
    --note: #7ea5ff; --note-soft: #172038; --tip: #4fd1a1; --tip-soft: #10261f; --caution: #f0b24a; --caution-soft: #2a2110;
    --warning: #ff7b7b; --warning-soft: #2e1515; --important: #b894ff; --important-soft: #221a36;
    --code-bg: #1d212b; --kbd-bg: #20242e; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.35);
    --dg-ink: #e6e9ef; --dg-muted: #a1a9b7; --dg-line: #6e7686; --dg-grid: #2a2f3a; --dg-surface: #1a1e27; --dg-panel: #20252f;
    --dg-blue: #7ea5ff; --dg-blue-soft: #1d2a4d; --dg-green: #4fd1a1; --dg-green-soft: #14322a; --dg-amber: #f3b54f; --dg-amber-soft: #36290f;
    --dg-red: #ff7a7a; --dg-red-soft: #3a1b1b; --dg-violet: #b894ff; --dg-violet-soft: #2a2143; --dg-cyan: #5fd4ec; --dg-cyan-soft: #123037;
    --dg-steel: #5a616d; --dg-steel-2: #4a505b; --dg-steel-3: #8e96a3; --dg-resin: #b58c52; --dg-resin-2: #8f6a37; --dg-tissue: #d9a36a;
    --dg-dark: #0b0d10; --dg-screen: #07080a;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 16.5px/1.68 var(--font); font-kerning: normal; }
:lang(ja) body, :lang(zh-Hans) body { line-height: 1.85; letter-spacing: .01em; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-ink); }
img, video { max-width: 100%; height: auto; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--surface); padding: 8px 12px; border-radius: 8px; }
.skip-link:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- frame ---------- */
#sidebar { position: fixed; inset: 0 auto 0 0; width: 304px; background: var(--surface); border-right: 1px solid var(--line); display: flex; flex-direction: column; z-index: 30; }
.topbar { position: fixed; top: 0; left: 304px; right: 0; height: 56px; display: flex; align-items: center; gap: 12px; padding: 0 20px; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); z-index: 20; }
.topbar-title { flex: 1; min-width: 0; font-weight: 500; color: var(--muted); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.menu-btn { display: none; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 9px; padding: 6px 10px; font: inherit; font-size: 14px; cursor: pointer; }
.icon-btn { display: inline-grid; place-items: center; width: 36px; height: 36px; border: 1px solid transparent; background: transparent; color: var(--ink-2); border-radius: 9px; cursor: pointer; }
.icon-btn:hover { background: var(--surface-2); border-color: var(--line); }
.icon-btn .ico { width: 18px; height: 18px; }
#theme-toggle .ico[data-icon="sun"] { display: none; }
:root[data-theme="dark"] #theme-toggle .ico[data-icon="sun"] { display: block; }
:root[data-theme="dark"] #theme-toggle .ico[data-icon="moon"] { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) #theme-toggle .ico[data-icon="sun"] { display: block; } :root:not([data-theme="light"]) #theme-toggle .ico[data-icon="moon"] { display: none; } }
.lang-switch { display: flex; align-items: center; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); margin-right: 4px; }
.lang-switch > .ico { width: 16px; height: 16px; color: var(--muted); margin: 0 4px 0 5px; }
.lang-link { padding: 3px 9px; border-radius: 7px; color: var(--ink-2); text-decoration: none; font-size: 13.5px; font-weight: 500; line-height: 1.5; white-space: nowrap; }
.lang-link:hover { background: var(--surface-2); color: var(--ink); }
.lang-link.current { background: var(--accent); color: #fff; }
:root[data-theme="dark"] .lang-link.current { color: #0b1020; }
.page { margin-left: 304px; padding-top: 56px; }
#content { max-width: 900px; margin: 0 auto; padding: 28px 44px 40px; }
.page-foot { max-width: 900px; margin: 0 auto; padding: 28px 44px 60px; color: var(--muted); font-size: 13.5px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- sidebar ---------- */
.brand { display: flex; align-items: center; gap: 12px; padding: 18px 20px 14px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; object-fit: contain; border-radius: 9px; background: #fff; }
:root[data-theme="dark"] .brand img { background: #fff; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 19px; letter-spacing: .12em; font-weight: 500; }
.brand-name b { font-weight: 700; }
.brand-sub { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin-top: 3px; }
:lang(ja) .brand-sub, :lang(zh-Hans) .brand-sub { letter-spacing: .08em; }
.search { position: relative; margin: 4px 16px 6px; }
.search .ico { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--muted); pointer-events: none; }
.search input { width: 100%; height: 40px; padding: 0 36px 0 34px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--bg); color: var(--ink); font: inherit; font-size: 14.5px; }
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search kbd { position: absolute; right: 9px; top: 50%; transform: translateY(-50%); }
.search-status { font-size: 12.5px; color: var(--muted); padding: 0 20px; min-height: 0; }
.search-status:not(:empty) { padding: 2px 20px 6px; }
.search-results { overflow: auto; flex: 1; padding: 0 10px 14px; }
.search-results a { display: block; padding: 8px 10px; border-radius: 9px; text-decoration: none; color: var(--ink); }
.search-results a:hover, .search-results a.active { background: var(--accent-soft); }
.search-results strong { display: block; font-weight: 600; font-size: 14px; }
.search-results .r-ch { display: block; font-size: 11.5px; color: var(--muted); }
.search-results small { display: block; color: var(--ink-2); font-size: 12.5px; line-height: 1.45; margin-top: 2px; }
.search-results mark { background: color-mix(in srgb, var(--caution) 28%, transparent); color: inherit; border-radius: 3px; padding: 0 1px; }
.toc { overflow: auto; flex: 1; padding: 6px 10px 18px; scrollbar-width: thin; }
.toc-intro { display: block; padding: 7px 10px; border-radius: 8px; text-decoration: none; color: var(--ink-2); font-size: 14px; font-weight: 500; }
.toc-intro:hover { background: var(--surface-2); }
.toc-part { margin-top: 10px; }
.toc-part-title { font-size: 11.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 10px 10px 5px; }
.toc-part-title span { color: var(--accent); margin-right: 4px; }
:lang(ja) .toc-part-title, :lang(zh-Hans) .toc-part-title { text-transform: none; letter-spacing: .02em; font-size: 12px; }
.toc-ch-link { display: flex; gap: 9px; align-items: baseline; padding: 5px 10px; border-radius: 8px; text-decoration: none; color: var(--ink-2); font-size: 14px; line-height: 1.35; }
.toc-ch-link:hover { background: var(--surface-2); color: var(--ink); }
.toc-n { min-width: 20px; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 12.5px; text-align: right; }
.toc-ch.current > .toc-ch-link { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; }
.toc-ch.current > .toc-ch-link .toc-n { color: var(--accent); }
.toc-secs { display: none; margin: 2px 0 6px 29px; border-left: 1px solid var(--line); }
.toc-ch.current .toc-secs { display: block; }
.toc-secs a { display: block; padding: 3px 10px; font-size: 13px; color: var(--muted); text-decoration: none; line-height: 1.35; }
.toc-secs a:hover { color: var(--ink); }
.toc-secs a.current { color: var(--accent-ink); font-weight: 500; box-shadow: inset 2px 0 0 var(--accent); }
.toc-sn { font-variant-numeric: tabular-nums; color: var(--muted); margin-right: 3px; font-size: 12px; }
.sidebar-foot { font-size: 12px; color: var(--muted); padding: 12px 20px 16px; border-top: 1px solid var(--line); }

/* ---------- typography ---------- */
.intro-title { font-size: 44px; line-height: 1.1; letter-spacing: -.02em; margin: 26px 0 8px; font-weight: 600; }
:lang(ja) .intro-title, :lang(zh-Hans) .intro-title { letter-spacing: 0; font-size: 40px; }
.intro .lead { font-size: 19px; color: var(--ink-2); margin-top: 0; }
.part-divider { margin: 72px 0 8px; padding: 26px 28px; border-radius: 16px; background: linear-gradient(135deg, var(--accent-soft), var(--surface-2)); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; }
.part-num { font-size: 12.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.part-title { font-size: 27px; font-weight: 600; letter-spacing: -.01em; }
section.chapter { padding-top: 12px; }
h2.chapter-title { display: flex; align-items: center; gap: 16px; font-size: 32px; line-height: 1.2; letter-spacing: -.015em; margin: 56px 0 18px; padding-bottom: 16px; border-bottom: 1px solid var(--line); font-weight: 600; }
:lang(ja) h2.chapter-title, :lang(zh-Hans) h2.chapter-title { letter-spacing: 0; font-size: 29px; }
.chap-num { flex: none; display: inline-grid; place-items: center; min-width: 48px; height: 48px; padding: 0 8px; border-radius: 13px; background: var(--ink); color: var(--bg); font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
h3 { font-size: 22.5px; line-height: 1.3; margin: 44px 0 12px; font-weight: 600; letter-spacing: -.005em; }
.sec-num { color: var(--muted); font-weight: 500; margin-right: 4px; font-variant-numeric: tabular-nums; }
h4 { font-size: 18px; margin: 30px 0 8px; font-weight: 600; }
h5 { font-size: 16px; margin: 22px 0 6px; font-weight: 600; color: var(--ink-2); }
p { margin: 0 0 14px; }
ul, ol { padding-left: 1.4em; margin: 0 0 16px; }
li { margin: 4px 0; }
li > ul, li > ol { margin: 4px 0 6px; }
strong { font-weight: 600; }
hr { border: none; border-top: 1px solid var(--line); margin: 30px 0; }
code { font-family: var(--mono); font-size: .88em; background: var(--code-bg); padding: 1px 5px; border-radius: 5px; word-break: break-word; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: 10px; overflow: auto; font-size: 14px; line-height: 1.5; }
pre code { background: none; padding: 0; }
kbd { display: inline-block; min-width: 1.6em; padding: 0 .45em; font: 500 .82em/1.65 var(--mono); text-align: center; color: var(--ink); background: var(--kbd-bg); border: 1px solid var(--line-2); border-bottom-width: 2px; border-radius: 6px; white-space: nowrap; vertical-align: .08em; }
.ico { width: 1.05em; height: 1.05em; vertical-align: -.17em; stroke-width: 2; display: inline-block; }
p .ico, li .ico, td .ico { color: var(--ink-2); }
.ui-chip { display: inline-block; padding: 0 .5em; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--line); font-size: .92em; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 6px 0 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.5; }
th, td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; background: var(--surface-2); font-size: 13.5px; color: var(--ink-2); }
tr:last-child td { border-bottom: none; }
td:first-child { font-weight: 500; }

/* ---------- lists: steps and legends ---------- */
ol.steps { list-style: none; counter-reset: step; padding-left: 0; }
ol.steps > li { counter-increment: step; position: relative; padding-left: 44px; margin: 10px 0 12px; }
ol.steps > li::before { content: counter(step); position: absolute; left: 0; top: .05em; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-soft); color: var(--accent-ink); font-weight: 700; font-size: 14px; display: grid; place-items: center; }
ol.legend { list-style: none; counter-reset: lg; padding-left: 0; margin-top: -4px; display: grid; gap: 4px 22px; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); }
ol.legend > li { counter-increment: lg; position: relative; padding-left: 36px; margin: 3px 0; font-size: 15px; line-height: 1.5; }
ol.legend > li::before { content: counter(lg); position: absolute; left: 0; top: .05em; width: 24px; height: 24px; border-radius: 50%; background: var(--marker); color: var(--marker-ink); font-weight: 700; font-size: 12.5px; display: grid; place-items: center; box-shadow: 0 0 0 2px var(--bg); }

/* ---------- callouts ---------- */
.callout { margin: 20px 0; padding: 14px 18px 4px; border-radius: 12px; border: 1px solid color-mix(in srgb, var(--c) 30%, var(--line)); background: var(--cs); }
.callout-title { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; letter-spacing: .02em; color: var(--c); margin-bottom: 6px; }
.callout-title .ico { width: 18px; height: 18px; color: var(--c); }
.callout p:last-child, .callout ul:last-child, .callout ol:last-child { margin-bottom: 10px; }
.callout-note { --c: var(--note); --cs: var(--note-soft); }
.callout-tip { --c: var(--tip); --cs: var(--tip-soft); }
.callout-caution { --c: var(--caution); --cs: var(--caution-soft); }
.callout-warning { --c: var(--warning); --cs: var(--warning-soft); }
.callout-important { --c: var(--important); --cs: var(--important-soft); }

/* ---------- figures ---------- */
figure.fig { position: relative; margin: 26px 0 28px; }
figure.fig > img, .shot-frame, figure.fig > video, .dg-wrap, .gal { border-radius: 12px; }
figure.fig > img { display: block; margin: 0 auto; border: 1px solid var(--line); background: #000; }
figure.fig-photo > img { background: var(--photo-bg); }
.shot-frame { position: relative; line-height: 0; border: 1px solid var(--line-2); overflow: hidden; box-shadow: var(--shadow); background: #000; margin-left: auto; margin-right: auto; }
figure.fig-shot figcaption { text-align: center; }
.shot-frame img { display: block; width: 100%; }
.shot-marker { position: absolute; transform: translate(-50%, -50%); width: 26px; height: 26px; border-radius: 50%; background: var(--marker); color: var(--marker-ink); font: 700 13px/26px var(--font-latin); text-align: center; box-shadow: 0 0 0 2px #fff, 0 2px 8px rgba(0,0,0,.45); pointer-events: none; }
.shot-box { position: absolute; border: 2.5px solid var(--marker); border-radius: 8px; box-shadow: 0 0 0 1px rgba(255,255,255,.5), 0 0 0 9999px rgba(0,0,0,.0); pointer-events: none; }
.shot-box.dim { box-shadow: 0 0 0 9999px rgba(0,0,0,.35); }
.shot-box.soft { border-style: dashed; }
.dg-wrap { background: var(--dg-surface); border: 1px solid var(--line); padding: 10px; line-height: 0; }
svg.dg { width: 100%; height: auto; display: block; font-family: var(--font); }
figure.fig figcaption { font-size: 14.5px; line-height: 1.55; color: var(--muted); margin-top: 10px; padding: 0 2px; }
.fig-num { font-weight: 700; color: var(--ink-2); margin-right: 3px; }
figure.size-wide { margin-left: -60px; margin-right: -60px; }
figure.size-half { max-width: 460px; }
figure.size-narrow { max-width: 360px; }
figure.size-half, figure.size-narrow { margin-left: auto; margin-right: auto; }
figure.size-half figcaption, figure.size-narrow figcaption { text-align: center; }
.fig-zoom { position: absolute; inset: 0 0 auto 0; height: calc(100% - 40px); z-index: 2; background: transparent; border: 0; cursor: zoom-in; }
figure.fig-video .fig-zoom { display: none; }
figure.fig > video { display: block; width: 100%; border: 1px solid var(--line); background: #000; }
.gal { display: grid; grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr)); gap: 12px; }
.gal-cell { position: relative; line-height: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); background: var(--photo-bg); }
.gal-cell img { width: 100%; height: 100%; object-fit: contain; display: block; aspect-ratio: var(--ar, 4 / 3); }
.gal-label { position: absolute; left: 8px; bottom: 8px; line-height: 1.35; font-size: 13px; font-weight: 600; background: rgba(12, 14, 18, .78); color: #fff; padding: 3px 9px; border-radius: 7px; }
.missing { padding: 20px; border: 2px dashed var(--warning); color: var(--warning); border-radius: 10px; }

/* ---------- lightbox ---------- */
#lightbox { width: min(96vw, 1800px); max-height: 94vh; padding: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); color: var(--ink); box-shadow: 0 24px 80px rgba(0,0,0,.45); }
#lightbox::backdrop { background: rgba(8, 10, 14, .72); }
.lb-bar { display: flex; gap: 14px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 14px; }
#lb-caption { flex: 1; color: var(--muted); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#lb-close { font: inherit; border: 1px solid var(--line); background: var(--surface-2); color: var(--ink); border-radius: 8px; padding: 5px 12px; cursor: pointer; }
.lb-body { overflow: auto; max-height: calc(94vh - 56px); padding: 14px; display: grid; place-items: center; }
.lb-body img, .lb-body .shot-frame { max-width: 100%; max-height: calc(94vh - 90px); width: auto; }
.lb-body .shot-frame img { max-height: calc(94vh - 90px); width: auto; }
.lb-body svg.dg { width: min(100%, 1500px); max-height: calc(94vh - 90px); }
.lb-body .gal { width: 100%; }

/* ---------- misc blocks ---------- */
.columns { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 99px; background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2); vertical-align: .1em; }
.route-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; margin: 14px 0 24px; }
.route-grid a { display: block; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; color: var(--ink); box-shadow: var(--shadow); }
.route-grid a:hover { border-color: var(--accent); }
.route-grid b { display: block; font-size: 15.5px; margin-bottom: 3px; }
.route-grid span { display: block; font-size: 13.5px; color: var(--muted); line-height: 1.45; }
section.chapter.fallback::before { content: "EN"; float: right; font-size: 11px; font-weight: 700; color: var(--caution); border: 1px solid var(--caution); border-radius: 6px; padding: 0 6px; margin-top: 70px; }
a.xref.broken { color: var(--warning); text-decoration: wavy underline; }

/* ---------- widgets ---------- */
.widget { margin: 24px 0; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); overflow: hidden; }
.widget-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.widget-head h5 { margin: 0; font-size: 15px; color: var(--ink); }
.widget-head span { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.widget-body { padding: 14px 16px 16px; }
.widget-controls { display: flex; flex-wrap: wrap; gap: 12px 22px; align-items: center; font-size: 14px; margin-top: 10px; }
.widget-controls label { display: flex; align-items: center; gap: 8px; }
.widget-controls input[type="range"] { accent-color: var(--accent); width: 150px; }
.widget-controls select { font: inherit; padding: 4px 8px; border-radius: 8px; border: 1px solid var(--line-2); background: var(--bg); color: var(--ink); }
.widget-controls input[type="number"] { width: 90px; font: inherit; padding: 4px 8px; border-radius: 8px; border: 1px solid var(--line-2); background: var(--bg); color: var(--ink); }
.widget-controls output { font-variant-numeric: tabular-nums; font-weight: 600; min-width: 64px; }
.widget-controls button { font: inherit; font-size: 13.5px; border: 1px solid var(--line-2); background: var(--surface); color: var(--ink); border-radius: 8px; padding: 5px 12px; cursor: pointer; }
.widget-controls button[aria-pressed="true"], .widget-controls button.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.widget-readout { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; margin-top: 12px; }
.widget-readout div { background: var(--surface-2); border-radius: 10px; padding: 8px 10px; font-size: 12.5px; color: var(--muted); }
.widget-readout b { display: block; font-size: 17px; color: var(--ink); font-variant-numeric: tabular-nums; }
.widget svg { width: 100%; height: auto; display: block; }

/* ---------- drawing classes (inline SVG) ---------- */
.dg text { fill: var(--dg-ink); font-family: var(--font); }
.dg .t-muted { fill: var(--dg-muted); }
.dg .t-blue { fill: var(--dg-blue); } .dg .t-green { fill: var(--dg-green); } .dg .t-amber { fill: var(--dg-amber); } .dg .t-red { fill: var(--dg-red); } .dg .t-violet { fill: var(--dg-violet); } .dg .t-cyan { fill: var(--dg-cyan); } .dg .t-white { fill: #fff; }
.dg .t-title { font-weight: 700; } .dg .t-bold { font-weight: 600; } .dg .t-mono { font-family: var(--mono); }
.dg .ln { stroke: var(--dg-line); fill: none; } .dg .ln-ink { stroke: var(--dg-ink); fill: none; } .dg .ln-muted { stroke: var(--dg-muted); fill: none; } .dg .ln-grid { stroke: var(--dg-grid); fill: none; }
.dg .ln-blue { stroke: var(--dg-blue); fill: none; } .dg .ln-green { stroke: var(--dg-green); fill: none; } .dg .ln-amber { stroke: var(--dg-amber); fill: none; } .dg .ln-red { stroke: var(--dg-red); fill: none; } .dg .ln-violet { stroke: var(--dg-violet); fill: none; } .dg .ln-cyan { stroke: var(--dg-cyan); fill: none; }
.dg .f-surface { fill: var(--dg-surface); } .dg .f-panel { fill: var(--dg-panel); } .dg .f-ink { fill: var(--dg-ink); } .dg .f-muted { fill: var(--dg-muted); } .dg .f-line { fill: var(--dg-line); } .dg .f-grid { fill: var(--dg-grid); }
.dg .f-blue { fill: var(--dg-blue); } .dg .f-blue-soft { fill: var(--dg-blue-soft); } .dg .f-green { fill: var(--dg-green); } .dg .f-green-soft { fill: var(--dg-green-soft); } .dg .f-amber { fill: var(--dg-amber); } .dg .f-amber-soft { fill: var(--dg-amber-soft); }
.dg .f-red { fill: var(--dg-red); } .dg .f-red-soft { fill: var(--dg-red-soft); } .dg .f-violet { fill: var(--dg-violet); } .dg .f-violet-soft { fill: var(--dg-violet-soft); } .dg .f-cyan { fill: var(--dg-cyan); } .dg .f-cyan-soft { fill: var(--dg-cyan-soft); }
.dg .f-steel { fill: var(--dg-steel); } .dg .f-steel2 { fill: var(--dg-steel-2); } .dg .f-steel3 { fill: var(--dg-steel-3); } .dg .f-resin { fill: var(--dg-resin); } .dg .f-resin2 { fill: var(--dg-resin-2); } .dg .f-tissue { fill: var(--dg-tissue); } .dg .f-dark { fill: var(--dg-dark); } .dg .f-screen { fill: var(--dg-screen); } .dg .f-white { fill: #fff; } .dg .f-none { fill: none; }
.dg .s-surface { stroke: var(--dg-surface); } .dg .s-line { stroke: var(--dg-line); } .dg .s-ink { stroke: var(--dg-ink); } .dg .s-blue { stroke: var(--dg-blue); } .dg .s-green { stroke: var(--dg-green); } .dg .s-amber { stroke: var(--dg-amber); } .dg .s-red { stroke: var(--dg-red); } .dg .s-violet { stroke: var(--dg-violet); } .dg .s-cyan { stroke: var(--dg-cyan); } .dg .s-muted { stroke: var(--dg-muted); } .dg .s-steel3 { stroke: var(--dg-steel-3); } .dg .s-white { stroke: #fff; }
.dg .mk-ink { fill: var(--dg-ink); } .dg .mk-blue { fill: var(--dg-blue); } .dg .mk-red { fill: var(--dg-red); } .dg .mk-green { fill: var(--dg-green); } .dg .mk-amber { fill: var(--dg-amber); } .dg .mk-violet { fill: var(--dg-violet); } .dg .mk-muted { fill: var(--dg-muted); } .dg .mk-line { fill: var(--dg-line); } .dg .mk-cyan { fill: var(--dg-cyan); }
.dg .dash { stroke-dasharray: 6 5; } .dg .dot { stroke-dasharray: 2 4; stroke-linecap: round; }
.dg .anim-pulse { animation: dg-pulse 2.4s ease-in-out infinite; }
@keyframes dg-pulse { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .dg .anim-pulse { animation: none; } }

/* ---------- responsive ---------- */
@media (max-width: 1320px) { figure.size-wide { margin-left: 0; margin-right: 0; } }
@media (max-width: 1060px) {
  #sidebar { transform: translateX(-100%); transition: transform .2s ease; box-shadow: var(--shadow); width: min(88vw, 330px); }
  body.menu-open #sidebar { transform: none; }
  .topbar { left: 0; }
  .menu-btn { display: inline-flex; }
  .page { margin-left: 0; }
  #content, .page-foot { padding-left: 22px; padding-right: 22px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .topbar { padding: 0 10px; gap: 8px; }
  .topbar-title { display: none; }
  .lang-switch > .ico { display: none; }
  .lang-link { padding: 3px 5px; font-size: 12px; }
  .intro-title { font-size: 34px; }
  h2.chapter-title { font-size: 25px; gap: 12px; }
  .chap-num { min-width: 40px; height: 40px; font-size: 18px; }
  h3 { font-size: 20px; }
  .columns { grid-template-columns: 1fr; }
  .gal { grid-template-columns: repeat(min(var(--cols, 3), 2), minmax(0, 1fr)); }
  ol.legend { grid-template-columns: 1fr; }
  .shot-marker { width: 20px; height: 20px; font-size: 11px; line-height: 20px; }
  .part-divider { padding: 18px 18px; }
  .part-title { font-size: 22px; }
}
@media (max-width: 400px) {
  .menu-btn > span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}

/* ---------- print ---------- */
@media print {
  :root { --bg: #fff; --surface: #fff; }
  body { font-size: 11pt; background: #fff; color: #000; }
  #sidebar, .topbar, .skip-link, .fig-zoom, #lightbox, .widget-controls { display: none !important; }
  .page { margin: 0; padding: 0; }
  #content { max-width: none; padding: 0; }
  .part-divider { break-before: page; background: none; border: 2px solid #000; }
  section.chapter { break-before: page; }
  .part-divider + section.chapter { break-before: avoid; }
  figure, .callout, table, .widget { break-inside: avoid; }
  h2, h3, h4 { break-after: avoid; }
  a { color: #000; text-decoration: none; }
  figure.size-wide { margin-left: 0; margin-right: 0; }
  .shot-frame { box-shadow: none; }
}