/* Cosmic Ray Detector — manual page
   Self-contained on purpose: the tokens below mirror the "Stardust Notebook" values in
   style.css (landing page), but this page does not load style.css, so none of its
   3D / hero rules can leak in. If the landing tokens change, change them here too. */
.manual {
  --bg: #FAF6EB;
  --bg2: #F2EBD9;
  --bg3: #FFFDF7;
  --ink: #2A2730;
  --ink2: #4F4956;
  --muted: #6E6776;
  --dim: #8A8391;
  --line: rgba(42, 39, 48, 0.12);
  --line2: rgba(42, 39, 48, 0.22);
  --coral: #C8654E;
  --coral2: #A84A37;
  --mauve: #7C65A6;
  --cyan: #2E8BA0;
  --green: #3F8A5C;
  --rose: #D77A95;
  --rose2: #B4546F;
  --amber: #B7791F;
  --dash: #D8CFB6;
  --radius: 14px;
  --f-jp: "Noto Sans JP", system-ui, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --f-disp: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --f-en: "Fraunces", var(--f-jp);
  --f-mono: "JetBrains Mono", ui-monospace, Consolas, "Courier New", monospace;
  --head-h: 60px;
  color-scheme: light;
}

.manual * { box-sizing: border-box; }
html.manual-page { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 78px; }
.manual {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--f-jp); font-size: 16px; line-height: 1.9; letter-spacing: 0.02em;
  font-feature-settings: "palt"; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
.manual::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(42, 39, 48, 0.04) 31px 32px),
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(244, 196, 161, 0.2), transparent 60%),
    radial-gradient(ellipse 60% 40% at 0% 70%, rgba(220, 201, 232, 0.18), transparent 60%);
}
.manual img, .manual svg { display: block; max-width: 100%; }
.manual a { color: var(--coral2); text-underline-offset: 3px; text-decoration-color: rgba(168, 74, 55, 0.4); }
.manual a:hover { color: var(--rose2); text-decoration-color: currentColor; }
.manual button { font: inherit; color: inherit; cursor: pointer; }
.manual :focus-visible { outline: 2px solid var(--rose); outline-offset: 3px; border-radius: 6px; }
.manual ::selection { background: rgba(215, 122, 149, 0.3); }
.manual code, .manual kbd, .manual samp { font-family: var(--f-mono); font-size: 0.86em; }
.manual code { background: rgba(42, 39, 48, 0.07); padding: 1px 6px; border-radius: 5px; word-break: break-word; }
.manual kbd { background: var(--bg3); border: 1px solid var(--line2); border-bottom-width: 2px; border-radius: 5px; padding: 0 6px; }
.manual .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.manual .skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 10px; text-decoration: none; }
.manual .skip:focus { top: 10px; }

/* ------------------------------------------------------------------ model filter */
html[data-model="v1"] [data-m="v2"], html[data-model="v2"] [data-m="v1"] { display: none !important; }

/* ------------------------------------------------------------------ header */
.manual .m-head {
  position: sticky; top: 0; z-index: 50; height: calc(var(--head-h) + env(safe-area-inset-top, 0px));
  padding: env(safe-area-inset-top, 0px) clamp(14px, 3vw, 32px) 0;
  display: flex; align-items: center; gap: 14px;
  background: rgba(250, 246, 235, 0.88); backdrop-filter: blur(12px) saturate(1.2); -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px dashed var(--dash);
}
.manual .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex: none; }
.manual .brand svg { width: 30px; height: 30px; }
.manual .brand span { display: flex; flex-direction: column; line-height: 1.05; }
.manual .brand b { font: 700 15px/1 var(--f-disp); letter-spacing: 0.1em; }
.manual .brand small { font: 500 10px/1.4 var(--f-mono); color: var(--muted); letter-spacing: 0.16em; margin-top: 3px; }
.manual .m-head .grow { flex: 1; }
.manual .m-links { display: flex; gap: 2px; font-size: 13.5px; }
.manual .m-links a { color: var(--ink2); text-decoration: none; padding: 7px 12px; border-radius: 99px; }
.manual .m-links a:hover { background: #FBE8EE; color: var(--rose2); }

.manual .seg { display: inline-flex; padding: 3px; border: 1px solid var(--line2); border-radius: 99px; background: rgba(255, 253, 247, 0.7); }
.manual .seg button {
  border: 0; background: transparent; color: var(--ink2); padding: 6px 13px; border-radius: 99px;
  font: 700 12.5px/1.2 var(--f-mono); letter-spacing: 0.04em; white-space: nowrap;
}
.manual .seg button:hover { color: var(--ink); }
.manual .seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.manual .seg-label { font: 500 11px/1 var(--f-mono); letter-spacing: 0.14em; color: var(--muted); text-transform: uppercase; }

.manual .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none;
  font: 700 14px/1 var(--f-jp); letter-spacing: 0.04em; padding: 13px 20px; border-radius: 99px; border: 1.5px solid var(--ink);
  background: rgba(255, 255, 255, 0.55); color: var(--ink); transition: background 0.2s ease, box-shadow 0.2s ease;
}
.manual .btn:hover { background: #fff; color: var(--ink); }
.manual .btn svg { width: 16px; height: 16px; }
.manual .btn-primary { background: var(--rose); border-color: var(--rose); color: #fff; box-shadow: 0 1px 2px rgba(180, 84, 111, 0.2), 0 12px 24px -10px rgba(215, 122, 149, 0.55); }
.manual .btn-primary:hover { background: var(--rose2); border-color: var(--rose2); color: #fff; }
.manual .btn-sm { padding: 9px 15px; font-size: 13px; }

/* ------------------------------------------------------------------ hero */
.manual .m-hero { max-width: 1120px; margin: 0 auto; padding: clamp(36px, 7vw, 72px) clamp(16px, 4vw, 40px) 8px; }
.manual .eyebrow { font: italic 400 17px/1.4 var(--f-en); color: var(--rose); display: flex; align-items: center; gap: 10px; margin: 0 0 14px; }
.manual .eyebrow::before { content: ""; width: 30px; height: 1.5px; background: var(--rose); border-radius: 2px; flex: none; }
.manual h1, .manual h2, .manual h3, .manual h4 { font-family: var(--f-disp); font-weight: 700; color: var(--ink); margin: 0; letter-spacing: 0.01em; }
.manual h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; line-height: 1.2; }
.manual .lead { color: var(--ink2); font-size: clamp(1rem, 1.4vw, 1.12rem); margin: 20px 0 0; max-width: 40em; }
.manual .meta { margin: 18px 0 0; font: 500 12.5px/1.8 var(--f-mono); color: var(--muted); letter-spacing: 0.04em; }
.manual .meta a { color: inherit; }

.manual .pick { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 34px 0 0; }
.manual .pick-card {
  background: rgba(255, 253, 247, 0.94); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  box-shadow: 0 1px 2px rgba(42, 39, 48, 0.05), 0 18px 40px -24px rgba(42, 39, 48, 0.3); display: flex; flex-direction: column;
}
.manual .pick-card img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; background: #ECE6F2; border-bottom: 1px solid var(--line); }
.manual .pick-card .body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.manual .pick-card h2 { font-size: 1.35rem; display: flex; align-items: center; gap: 10px; }
.manual .pick-card p { margin: 0; font-size: 14.5px; line-height: 1.8; color: var(--ink2); }
.manual .pick-card ul { margin: 0; padding-left: 1.2em; font-size: 14px; line-height: 1.8; color: var(--ink2); }
.manual .pick-card .btn { margin-top: auto; align-self: flex-start; }

.manual .tag {
  display: inline-block; font: 700 11.5px/1 var(--f-mono); letter-spacing: 0.06em; padding: 4px 8px 4px; border-radius: 6px; vertical-align: 0.12em;
  background: rgba(42, 39, 48, 0.08); color: var(--ink2);
}
.manual .tag.v1 { background: rgba(124, 101, 166, 0.16); color: #5B4585; }
.manual .tag.v2 { background: rgba(46, 139, 160, 0.16); color: #1F6577; }

/* ------------------------------------------------------------------ layout */
.manual .m-layout { max-width: 1120px; margin: 0 auto; padding: 34px clamp(16px, 4vw, 40px) 80px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.manual .m-toc { position: sticky; top: calc(var(--head-h) + 24px); max-height: calc(100vh - var(--head-h) - 48px); overflow: auto; font-size: 14px; padding-right: 4px; }
.manual .m-toc .t { font: 500 11px/1 var(--f-mono); letter-spacing: 0.18em; color: var(--muted); margin: 0 0 12px; }
.manual .m-toc ol { list-style: none; margin: 0; padding: 0; border-left: 1.5px solid var(--line2); }
.manual .m-toc a { display: flex; gap: 10px; align-items: baseline; padding: 6px 10px 6px 14px; margin-left: -1.5px; border-left: 1.5px solid transparent; text-decoration: none; color: var(--ink2); line-height: 1.5; }
.manual .m-toc a i { font: 500 11px/1 var(--f-mono); color: var(--dim); font-style: normal; flex: none; width: 1.6em; }
.manual .m-toc a:hover { color: var(--ink); }
.manual .m-toc a.on { color: var(--ink); border-left-color: var(--coral); font-weight: 700; }
.manual .m-toc a.on i { color: var(--coral); }
.manual .m-toc-m { display: none; margin: 0 0 26px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.9); }
.manual .m-toc-m summary { list-style: none; cursor: pointer; padding: 12px 16px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.manual .m-toc-m summary::-webkit-details-marker { display: none; }
.manual .m-toc-m summary::after { content: "＋"; color: var(--coral); }
.manual .m-toc-m[open] summary::after { content: "－"; }
.manual .doc .m-toc-m ol { list-style: none; margin: 0; padding: 0 8px 10px; columns: 2; column-gap: 12px; }
.manual .m-toc-m a { display: block; padding: 7px 10px; text-decoration: none; color: var(--ink2); font-size: 14.5px; }

/* ------------------------------------------------------------------ document */
.manual .doc { min-width: 0; max-width: 780px; }
.manual .m-sec { padding-top: 8px; margin-bottom: 72px; }
.manual .m-sec > h2 { font-size: clamp(1.6rem, 3.2vw, 2.15rem); line-height: 1.3; display: flex; align-items: baseline; gap: 14px; padding-bottom: 14px; border-bottom: 1.5px solid var(--ink); margin-bottom: 8px; }
.manual .m-sec > h2 .n { font: italic 400 1.15rem/1 var(--f-en); color: var(--rose); letter-spacing: 0.04em; flex: none; }
.manual .m-sec > .sub { color: var(--ink2); margin: 14px 0 26px; font-size: 15.5px; }
.manual .doc h3 { font-size: 1.28rem; line-height: 1.45; margin: 44px 0 12px; padding-left: 14px; border-left: 4px solid var(--coral); }
.manual .doc h4 { font-size: 1.05rem; margin: 28px 0 8px; font-family: var(--f-jp); font-weight: 700; }
.manual .doc p { margin: 0 0 1em; }
.manual .doc ul, .manual .doc ol { margin: 0 0 1.1em; padding-left: 1.4em; }
.manual .doc li { margin: 0.25em 0; }
.manual .doc li > ul, .manual .doc li > ol { margin: 0.3em 0 0.4em; }
.manual .doc hr { border: 0; border-top: 1px dashed var(--dash); margin: 36px 0; }
.manual .doc strong { font-weight: 700; }
.manual .small { font-size: 13.5px; color: var(--muted); line-height: 1.8; }

/* callouts */
.manual .callout { margin: 20px 0 24px; padding: 14px 18px 14px 18px; border-radius: 12px; border: 1px solid var(--line); border-left: 5px solid var(--cyan); background: rgba(255, 253, 247, 0.95); font-size: 15px; line-height: 1.85; }
.manual .callout > :last-child { margin-bottom: 0; }
.manual .callout::before { display: block; font: 700 11.5px/1 var(--f-mono); letter-spacing: 0.16em; margin: 0 0 8px; color: var(--cyan); }
.manual .callout.note::before { content: "NOTE"; }
.manual .callout.tip { border-left-color: var(--green); }
.manual .callout.tip::before { content: "TIP"; color: var(--green); }
.manual .callout.warn { border-left-color: var(--coral); background: #FFF6F1; }
.manual .callout.warn::before { content: "CAUTION"; color: var(--coral2); }
.manual .callout.src { border-left-color: var(--mauve); }
.manual .callout.src::before { content: "確認のしかた"; color: var(--mauve); letter-spacing: 0.08em; }
.manual .callout p { margin: 0 0 0.6em; }

/* steps */
.manual .steps { list-style: none; counter-reset: s; margin: 22px 0 28px; padding: 0 !important; }
.manual .steps > li { counter-increment: s; position: relative; padding: 0 0 26px 58px; margin: 0; }
.manual .steps > li::before {
  content: counter(s); position: absolute; left: 0; top: -2px; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; font: italic 600 1.15rem/1 var(--f-en); color: #fff; background: var(--coral);
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 5px var(--dash);
}
.manual .steps > li::after { content: ""; position: absolute; left: 19.5px; top: 44px; bottom: 6px; border-left: 1.5px dashed var(--dash); }
.manual .steps > li:last-child::after { display: none; }
.manual .steps > li > h3, .manual .steps > li > h4 { margin: 0 0 6px; padding: 0; border: 0; font-size: 1.12rem; font-family: var(--f-jp); }
.manual .steps > li > :last-child { margin-bottom: 0; }

/* tables */
.manual .tbl { overflow-x: auto; margin: 18px 0 26px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); -webkit-overflow-scrolling: touch; }
.manual .tbl table { border-collapse: collapse; width: 100%; font-size: 14.5px; line-height: 1.7; min-width: 520px; }
.manual .tbl caption { text-align: left; padding: 10px 14px 0; font: 700 12px/1.4 var(--f-mono); letter-spacing: 0.08em; color: var(--muted); }
.manual .tbl th, .manual .tbl td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.manual .tbl thead th { background: var(--bg2); font-weight: 700; white-space: nowrap; border-bottom: 1.5px solid var(--line2); }
.manual .tbl tbody th { font-weight: 700; white-space: nowrap; background: rgba(242, 235, 217, 0.45); }
.manual .tbl tr:last-child > * { border-bottom: 0; }
.manual .tbl td code { white-space: nowrap; }
.manual .tbl.wide table { min-width: 600px; }

/* code */
.manual pre { position: relative; margin: 14px 0 22px; padding: 14px 16px; background: #26233A; color: #E9E6F0; border-radius: 12px; overflow-x: auto; font: 400 13.5px/1.7 var(--f-mono); letter-spacing: 0; tab-size: 4; }
.manual pre code { background: none; padding: 0; color: inherit; font-size: inherit; word-break: normal; white-space: pre; }
.manual pre .c { color: #A9A3BC; }
.manual .copy { position: absolute; top: 8px; right: 8px; border: 1px solid rgba(233, 230, 240, 0.3); background: rgba(255, 255, 255, 0.08); color: #E9E6F0; border-radius: 8px; padding: 4px 10px; font: 500 11.5px/1.3 var(--f-mono); }
.manual .copy:hover { background: rgba(255, 255, 255, 0.18); }
.manual pre.has-copy { padding-right: 76px; }

/* figures */
.manual .fig { margin: 22px 0 28px; }
.manual .fig img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.manual .fig figcaption { margin-top: 8px; font-size: 13px; color: var(--muted); line-height: 1.7; }
.manual .fig figcaption b { color: var(--ink2); margin-right: 0.5em; }
.manual .fig-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 22px 0 28px; }
.manual .fig-row .fig { margin: 0; }
.manual .diagram { margin: 22px 0 28px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255, 253, 247, 0.95); }
.manual .diagram svg { width: 100%; height: auto; margin: 0 auto; max-width: 560px; }
.manual .diagram figcaption { margin-top: 8px; font-size: 13px; color: var(--muted); text-align: center; }
.manual .d-ink { fill: none; stroke: var(--ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.manual .d-thin { fill: none; stroke: var(--ink2); stroke-width: 1.2; stroke-linecap: round; }
.manual .d-box { fill: #fff; stroke: var(--ink); stroke-width: 1.8; }
.manual .d-fill1 { fill: rgba(124, 101, 166, 0.16); stroke: var(--mauve); stroke-width: 1.6; }
.manual .d-fill2 { fill: rgba(46, 139, 160, 0.16); stroke: var(--cyan); stroke-width: 1.6; }
.manual .d-fill3 { fill: rgba(200, 101, 78, 0.16); stroke: var(--coral); stroke-width: 1.6; }
.manual .d-tape { fill: none; stroke: #26233A; stroke-width: 7; stroke-linejoin: round; }
.manual .d-foil { fill: none; stroke: #9AA0A6; stroke-width: 3; stroke-linejoin: round; }
.manual .d-t { font: 500 13px/1.3 var(--f-jp); fill: var(--ink); letter-spacing: 0; }
.manual .d-t.s, .manual .d-t .s { font-size: 11.5px; fill: var(--ink2); }
.manual .d-t.m { font: 700 12px/1.3 var(--f-mono); }
.manual .d-t.c { text-anchor: middle; }
.manual .d-arrow { fill: var(--coral); }
.manual .d-sig { fill: none; stroke: var(--coral); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

/* flow chain */
.manual .chain { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(118px, 1fr)); gap: 10px 22px; padding: 0 !important; margin: 20px 0 26px; counter-reset: c; }
.manual .chain li { position: relative; margin: 0; padding: 12px 12px 12px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); font-size: 13.5px; line-height: 1.6; text-align: center; }
.manual .chain li b { display: block; font-size: 14.5px; margin-bottom: 2px; }
.manual .chain li span { color: var(--muted); font-size: 12.5px; }
.manual .chain li:not(:last-child)::after { content: "→"; position: absolute; right: -19px; top: 50%; transform: translateY(-50%); color: var(--coral); font-weight: 700; }

/* FAQ / details */
.manual .qa { margin: 12px 0; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); }
.manual .qa summary { list-style: none; cursor: pointer; padding: 13px 48px 13px 50px; position: relative; font-weight: 700; line-height: 1.6; }
.manual .qa summary::-webkit-details-marker { display: none; }
.manual .qa summary::before { content: "Q"; position: absolute; left: 14px; top: 11px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font: italic 600 14px/1 var(--f-en); background: var(--coral); color: #fff; }
.manual .qa summary::after { content: "＋"; position: absolute; right: 16px; top: 12px; color: var(--coral); font-weight: 400; }
.manual .qa[open] summary::after { content: "－"; }
.manual .qa[open] summary { border-bottom: 1px dashed var(--dash); }
.manual .qa .a { padding: 14px 18px 8px 50px; font-size: 15px; }
.manual .qa .a > :last-child { margin-bottom: 8px; }
.manual .qa-group { font: 700 12px/1 var(--f-mono); letter-spacing: 0.16em; color: var(--muted); margin: 34px 0 6px; }

.manual .panel { margin: 18px 0 24px; border: 1px solid var(--line2); border-radius: var(--radius); background: rgba(255, 253, 247, 0.95); }
.manual .panel > summary { list-style: none; cursor: pointer; padding: 14px 20px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.manual .panel > summary::-webkit-details-marker { display: none; }
.manual .panel > summary::after { content: "＋"; margin-left: auto; color: var(--coral); font-weight: 400; }
.manual .panel[open] > summary::after { content: "－"; }
.manual .panel[open] > summary { border-bottom: 1px dashed var(--dash); }
.manual .panel > .in { padding: 16px 20px 6px; }
.manual .panel .in > :last-child { margin-bottom: 10px; }

.manual .links-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; list-style: none; padding: 0 !important; margin: 16px 0 22px; }
.manual .links-grid a { display: block; height: 100%; padding: 14px 16px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); text-decoration: none; color: var(--ink); line-height: 1.6; font-weight: 700; }
.manual .links-grid a small { display: block; font-weight: 400; color: var(--muted); font-size: 13px; margin-top: 2px; }
.manual .links-grid a:hover { border-color: var(--coral); background: #fff; }
.manual .links-grid a::after { content: " ↗"; color: var(--coral); font-weight: 400; }

/* ------------------------------------------------------------------ footer */
.manual .m-foot { background: var(--bg2); border-top: 1px dashed var(--dash); padding: 30px clamp(16px, 4vw, 40px); }
.manual .m-foot-in { max-width: 1120px; margin: 0 auto; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px 24px; }
.manual .m-foot p { margin: 0; font-size: 12.5px; color: var(--muted); line-height: 1.8; }
.manual .m-foot a { color: var(--ink2); }
.manual .to-top { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 40; width: 44px; height: 44px; border-radius: 50%; border: 1.5px solid var(--ink); background: rgba(255, 253, 247, 0.95); display: grid; place-items: center; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; text-decoration: none; color: var(--ink); }
.manual .to-top.show { opacity: 1; pointer-events: auto; }
.manual .to-top svg { width: 18px; height: 18px; }

/* ------------------------------------------------------------------ responsive */
@media (max-width: 960px) {
  .manual .m-layout { grid-template-columns: minmax(0, 1fr); }
  .manual .m-toc { display: none; }
  .manual .m-toc-m { display: block; }
  .manual .m-links { display: none; }
}
@media (max-width: 680px) {
  html.manual-page { scroll-padding-top: 74px; }
  .manual { --head-h: 56px; }
  .manual { font-size: 15.5px; }
  .manual .brand small { display: none; }
  .manual .m-head { gap: 8px; }
  .manual .seg-label { display: none; }
  .manual .seg button { padding: 6px 10px; }
  .manual .pick { grid-template-columns: minmax(0, 1fr); }
  .manual .fig-row { grid-template-columns: minmax(0, 1fr); }
  .manual .links-grid { grid-template-columns: minmax(0, 1fr); }
  .manual .doc .m-toc-m ol { columns: 1; }
  .manual .steps > li { padding-left: 50px; }
  .manual .steps > li::before { width: 34px; height: 34px; font-size: 1rem; }
  .manual .steps > li::after { left: 16.5px; top: 38px; }
  .manual .chain { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 20px; }
  .manual .chain li:nth-child(2n)::after { display: none; }
  .manual .qa summary { padding-left: 46px; padding-right: 40px; }
  .manual .qa .a { padding-left: 18px; padding-right: 16px; }
  .manual .doc h3 { margin-top: 36px; }

  /* long 3-column tables read as one card per row instead of scrolling sideways */
  .manual .tbl.stack { border: 0; background: none; overflow: visible; }
  .manual .tbl.stack table, .manual .tbl.stack.wide table { display: block; min-width: 0; }
  .manual .tbl.stack thead { display: none; }
  .manual .tbl.stack tbody, .manual .tbl.stack tr { display: block; }
  .manual .tbl.stack caption { display: block; padding: 0 2px 8px; }
  .manual .tbl.stack tr { margin: 0 0 12px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); overflow: hidden; }
  .manual .tbl.stack td, .manual .tbl.stack th { display: block; border: 0; padding: 9px 14px; }
  .manual .tbl.stack td + td { border-top: 1px dashed var(--dash); }
  .manual .tbl.stack td[data-label]::before { content: attr(data-label); display: block; font: 700 11px/1.2 var(--f-mono); letter-spacing: 0.1em; color: var(--muted); margin-bottom: 3px; }
  .manual .tbl.stack td code { white-space: normal; word-break: break-word; }
  .manual .tbl.stack.plain td::before { display: none; }
  .manual .tbl.stack tbody th { background: rgba(242, 235, 217, 0.55); white-space: normal; }
}

@media print {
  .manual::before, .manual .m-head, .manual .m-toc, .manual .m-toc-m, .manual .to-top, .manual .copy, .manual .seg { display: none !important; }
  .manual { background: #fff; font-size: 11pt; }
  .manual .m-layout { display: block; padding: 0; }
  .manual .m-sec { margin-bottom: 28pt; break-inside: auto; }
  .manual .tbl, .manual .callout, .manual .qa, .manual .panel, .manual pre, .manual .fig, .manual .diagram { break-inside: avoid; }
  .manual pre { background: #f4f2f8; color: #222; border: 1px solid #ccc; }
  .manual a { color: inherit; text-decoration: none; }
  .manual .m-foot { background: none; }
}
@media (prefers-reduced-motion: reduce) { html.manual-page { scroll-behavior: auto; } }

/* ================================================================== diagrams (added) */
/* flow strip with icons */
.manual .flow { list-style: none; display: grid; grid-template-columns: repeat(var(--n, 6), minmax(0, 1fr)); gap: 14px 18px; padding: 0 !important; margin: 24px 0 32px; counter-reset: f; }
.manual .flow li { position: relative; margin: 0; padding: 16px 5px 12px; text-align: center; border: 1px solid var(--line2); border-radius: 14px; background: rgba(255, 253, 247, 0.95); font-size: 13px; line-height: 1.55; counter-increment: f; }
.manual .flow li::before { content: counter(f); position: absolute; left: 9px; top: 6px; font: italic 600 14px/1 var(--f-en); color: var(--coral); }
.manual .flow li svg { width: 34px; height: 34px; margin: 0 auto 6px; color: var(--ink); }
.manual .flow li b { display: block; font-size: 13px; margin-bottom: 2px; }
.manual .flow li span { color: var(--muted); font-size: 12px; display: block; }
.manual .flow li:not(:last-child)::after { content: "→"; position: absolute; right: -16px; top: 50%; transform: translateY(-50%); color: var(--coral); font-weight: 700; }
.manual .flow.plain li { padding-top: 22px; }

/* photo / screenshot with numbered markers */
.manual .annot { position: relative; margin: 0; }
.manual .annot > img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.manual .annot .mk { position: absolute; width: 26px; height: 26px; margin: -13px 0 0 -13px; border-radius: 50%; background: var(--coral); color: #fff; font: 700 13px/26px var(--f-mono); text-align: center; box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.92), 0 2px 8px rgba(0, 0, 0, 0.4); pointer-events: none; }
.manual .annot .mk.k { background: var(--cyan); }
.manual .legend-list { columns: 2; column-gap: 28px; margin: 14px 0 0 !important; padding: 0 !important; list-style: none; counter-reset: l; font-size: 14px; }
.manual .legend-list li { counter-increment: l; break-inside: avoid; padding-left: 32px; position: relative; margin: 0 0 8px; line-height: 1.65; }
.manual .legend-list li::before { content: counter(l); position: absolute; left: 0; top: 2px; width: 22px; height: 22px; border-radius: 50%; background: var(--coral); color: #fff; font: 700 12px/22px var(--f-mono); text-align: center; }
.manual .legend-list li b { font-weight: 700; }
.manual .legend-list.one { columns: 1; }
.manual .fig-block { margin: 26px 0 32px; }
.manual .fig-block > h4 { margin: 0 0 10px; }
.manual .fig-block > .cap { margin: 10px 0 0; font-size: 13px; color: var(--muted); line-height: 1.7; }

/* OLED screen mock-ups */
.manual .screens { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin: 18px 0 8px; }
.manual .screens.one { grid-template-columns: minmax(0, 360px); }
.manual .oled { margin: 0; }
.manual .oled .scr { background: #0B1020; color: #D3E9FF; border: 7px solid #1D2540; border-radius: 12px; padding: 12px 12px 12px; font: 500 14px/1.7 var(--f-mono); letter-spacing: 0; box-shadow: inset 0 0 28px rgba(120, 200, 255, 0.1), 0 10px 24px -14px rgba(42, 39, 48, 0.5); overflow-x: auto; }
.manual .oled .scr div { white-space: pre; }
.manual .oled figcaption { margin-top: 8px; font-size: 13px; color: var(--muted); }
.manual .n { display: inline-grid; place-items: center; width: 19px; height: 19px; margin: 0 2px 0 4px; border-radius: 50%; background: var(--coral); color: #fff; font: 700 11px/1 var(--f-mono); vertical-align: 1px; letter-spacing: 0; white-space: normal; }
.manual .tbl th .n, .manual .tbl td .n { margin: 0 8px 0 0; }

/* data-row anatomy */
.manual .rowx { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; padding: 0; list-style: none; }
.manual .rowx li { flex: 1 1 96px; max-width: 150px; margin: 0; border: 1.5px solid var(--g, var(--line2)); border-radius: 10px; background: #fff; overflow: hidden; text-align: center; }
.manual .rowx .h { display: block; background: var(--g); color: #fff; font: 700 11px/1.3 var(--f-mono); padding: 4px 6px; letter-spacing: 0; word-break: break-all; }
.manual .rowx .v { display: block; padding: 7px 6px 3px; font: 500 15px/1.3 var(--f-mono); letter-spacing: 0; }
.manual .rowx .m { display: block; padding: 0 6px 8px; font: 400 12px/1.5 var(--f-jp); color: var(--ink2); }
.manual .g-id { --g: #4F4956; } .manual .g-sig { --g: var(--coral); } .manual .g-time { --g: var(--mauve); } .manual .g-env { --g: var(--green); } .manual .g-ext { --g: var(--cyan); }
.manual .keys { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 6px 0 18px; padding: 0; list-style: none; font-size: 12.5px; color: var(--ink2); }
.manual .keys li { margin: 0; display: flex; align-items: center; gap: 6px; }
.manual .keys i { width: 12px; height: 12px; border-radius: 3px; background: var(--g); display: inline-block; }

/* step ladder (check in order) */
.manual .ladder { list-style: none; margin: 22px 0 30px; padding: 0 !important; counter-reset: r; }
.manual .ladder > li { counter-increment: r; position: relative; margin: 0 0 32px; padding: 13px 16px 13px 58px; border: 1px solid var(--line2); border-radius: 12px; background: rgba(255, 253, 247, 0.95); line-height: 1.75; }
.manual .ladder > li::before { content: counter(r); position: absolute; left: 15px; top: 13px; width: 30px; height: 30px; border-radius: 50%; background: var(--ink); color: #fff; font: 700 14px/30px var(--f-mono); text-align: center; }
.manual .ladder > li:not(:last-child)::after { content: "だめなら ↓"; position: absolute; left: 58px; bottom: -25px; font: 700 12px/1 var(--f-mono); color: var(--coral); }
.manual .ladder > li.end { background: #FFF6F1; border-color: var(--coral); }
.manual .ladder > li.end::before { background: var(--coral); content: "→"; }
.manual .ladder b { display: block; }

/* symptom cards */
.manual .triage { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; list-style: none; padding: 0 !important; margin: 18px 0 26px; }
.manual .triage > li { margin: 0; border: 1px solid var(--line2); border-top: 5px solid var(--t, var(--coral)); border-radius: 12px; background: rgba(255, 253, 247, 0.95); padding: 12px 15px 10px; font-size: 14.5px; line-height: 1.7; }
.manual .triage .sym { display: block; font-weight: 700; font-size: 15.5px; line-height: 1.5; }
.manual .triage .arrow { display: block; margin: 8px 0 2px; font: 700 11.5px/1.2 var(--f-mono); letter-spacing: 0.1em; color: var(--coral2); }
.manual .triage .t-mauve { --t: var(--mauve); } .manual .triage .t-cyan { --t: var(--cyan); } .manual .triage .t-green { --t: var(--green); }

.manual .simlink { display: flex; gap: 10px 14px; align-items: center; flex-wrap: wrap; margin: -10px 0 26px; padding: 11px 16px; border: 1px dashed var(--coral); border-radius: 12px; background: #FFF9F4; font-size: 14px; }
.manual .simlink b { color: var(--coral2); font: 700 11.5px/1 var(--f-mono); letter-spacing: 0.14em; }

@media (max-width: 680px) {
  .manual .flow { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px 20px; }
  .manual .flow li:nth-child(3n)::after { display: none; }
  .manual .flow li { font-size: 12.5px; padding-left: 4px; padding-right: 4px; }
  .manual .legend-list { columns: 1; }
  .manual .screens { grid-template-columns: minmax(0, 1fr); }
  .manual .triage { grid-template-columns: minmax(0, 1fr); }
  .manual .annot .mk { width: 22px; height: 22px; margin: -11px 0 0 -11px; font-size: 11.5px; line-height: 22px; }
  .manual .rowx li { flex-basis: 30%; max-width: none; }
}
@media print { .manual .simlink { display: none; } }

.manual .flow li span span, .manual .chain li span span { display: inline; }
.manual .fig.narrow img { max-width: 600px; }

.manual .scroll-hint { display: none; margin: 0 0 6px; font: 500 11.5px/1.4 var(--f-mono); color: var(--muted); }
@media (max-width: 680px) {
  .manual .annot-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 12px; }
  .manual .annot-scroll .annot { min-width: 760px; }
  .manual .scroll-hint { display: block; }
}

@media (max-width: 680px) {
  .manual .diagram { padding: 12px 8px; }
}

/* photos from the original Google Doc */
.manual .fig.nat img { width: 100%; height: auto; }
.manual .doc li > figure.fig, .manual .doc .in > figure.fig { margin: 12px 0 8px; max-width: 560px; }
.manual .doc li > .fig-row { margin: 12px 0 8px; }
.manual .doc li .fig-row .fig { max-width: none; }
.manual .fig-trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 14px 0 22px; }
.manual .fig-trio .fig { margin: 0; }
.manual .fig-trio .fig figcaption { font-size: 12.5px; }
@media (max-width: 680px) { .manual .fig-trio { grid-template-columns: minmax(0, 1fr); } }

/* language switch (same look as the landing page) */
.manual .lang-sw { flex: none; display: inline-flex; padding: 3px; border: 1px solid var(--line2); border-radius: 99px; font: 600 12px/1 var(--f-mono); letter-spacing: 0.06em; background: rgba(255, 253, 247, 0.7); }
.manual .lang-sw a, .manual .lang-sw span { padding: 6px 11px; border-radius: 99px; text-decoration: none; color: var(--ink2); }
.manual .lang-sw a:hover { color: var(--ink); background: rgba(42, 39, 48, 0.06); }
.manual .lang-sw .on { background: var(--ink); color: var(--bg); }
@media (max-width: 480px) {
  .manual .brand span { display: none; }
  .manual .lang-sw a, .manual .lang-sw span { padding: 6px 9px; }
}

/* English page: tighter leading, Latin-friendly headings */
html:lang(en) .manual { line-height: 1.75; letter-spacing: 0.004em; }
html:lang(en) .manual h1, html:lang(en) .manual h2, html:lang(en) .manual h3 { font-family: var(--f-en), var(--f-disp); font-weight: 600; letter-spacing: -0.005em; }
html:lang(en) .manual h1 { line-height: 1.12; }
html:lang(en) .manual .m-sec > h2 { font-size: clamp(1.55rem, 3vw, 2.05rem); }
html:lang(en) .manual .doc h3 { font-size: 1.22rem; }
html:lang(en) .manual .ladder > li:not(:last-child)::after { content: "If not \2193"; }

/* review round 3: touch targets, contrast, new components */
.manual .m-links a { padding: 11px 13px; }
.manual .seg button { min-height: 40px; padding: 8px 14px; }
.manual .lang-sw a, .manual .lang-sw span { display: inline-flex; align-items: center; min-height: 40px; padding: 0 13px; }
@media (max-width: 480px) {
  .manual .lang-sw a, .manual .lang-sw span { padding: 0 11px; }
  .manual .seg button { padding: 8px 11px; }
}
.manual .copy { min-height: 40px; min-width: 56px; }
.manual .m-toc a { padding-top: 10px; padding-bottom: 10px; }
.manual .m-toc a i { color: var(--muted); }
.manual .eyebrow { color: #A8445F; }
.manual .help-jump { margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 8px 10px; font-size: 14px; }
.manual .help-jump a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 16px; border-radius: 99px; border: 1.5px solid var(--line2); background: rgba(255, 253, 247, 0.8); color: var(--ink); text-decoration: none; font-weight: 700; }
.manual .help-jump a:hover { background: #fff; border-color: var(--ink); color: var(--ink); }
.manual .callout.prep { border-left-color: var(--green); }
.manual .callout.prep::before { content: "用意するもの"; color: var(--green); letter-spacing: 0.08em; }
.manual .callout.help { border-left-color: var(--mauve); }
.manual .callout.help::before { content: "相談するときは"; color: var(--mauve); letter-spacing: 0.08em; }
.manual .callout.safe { border-left-color: var(--coral); background: #FFF6F1; }
.manual .callout.safe::before { content: "安全のために"; color: var(--coral2); letter-spacing: 0.08em; }
.manual .callout ul, .manual .callout ol { margin: 0 0 0.6em; padding-left: 1.3em; }
.manual .callout li { margin: 0 0 3px; }
.manual .shot-side { display: grid; grid-template-columns: minmax(0, var(--w, 320px)) minmax(0, 1fr); gap: 8px 26px; align-items: start; margin: 18px 0 30px; }
.manual .shot-side > .annot { max-width: var(--w, 320px); }
.manual .shot-side .legend-list { columns: 1; margin: 0 !important; }
.manual .shot-side > .cap { grid-column: 1 / -1; margin: 0; font-size: 13px; color: var(--muted); }
@media (max-width: 760px) {
  .manual .shot-side { grid-template-columns: minmax(0, 1fr); }
  .manual .shot-side > .annot { max-width: min(100%, var(--w, 320px)); margin: 0 auto; }
}
.manual dl.gloss { display: grid; grid-template-columns: max-content minmax(0, 1fr); margin: 14px 0; border-top: 1px solid var(--line); }
.manual dl.gloss dt { font-weight: 700; padding: 10px 20px 10px 4px; border-bottom: 1px solid var(--line); }
.manual dl.gloss dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
@media (max-width: 680px) {
  .manual dl.gloss { grid-template-columns: minmax(0, 1fr); }
  .manual dl.gloss dt { padding-bottom: 0; border-bottom: 0; }
}
.manual ul.hist { margin: 8px 0 0; padding-left: 1.2em; font-size: 14px; color: var(--ink2); }
.manual .fig-trio img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.manual .hist-box { flex: 1 1 100%; font-size: 13px; color: var(--muted); }
.manual .hist-box summary { cursor: pointer; min-height: 40px; display: flex; align-items: center; font-weight: 700; color: var(--ink2); }
.manual .hist-box ul.hist { margin-top: 4px; }
.manual .btn-sm { min-height: 40px; }
.manual .brand { min-width: 40px; min-height: 40px; }
.manual .m-links a { display: inline-flex; align-items: center; min-height: 40px; }
.manual .seg button, .manual .lang-sw a, .manual .lang-sw span { min-width: 40px; justify-content: center; }
.manual .doc .m-toc-m li a { display: block; padding: 10px 10px; }
html:lang(en) .manual .callout.prep::before { content: "WHAT YOU NEED"; letter-spacing: 0.16em; }
html:lang(en) .manual .callout.help::before { content: "WHEN YOU ASK FOR HELP"; letter-spacing: 0.16em; }
html:lang(en) .manual .callout.safe::before { content: "FOR YOUR SAFETY"; letter-spacing: 0.16em; }

/* ------------------------------------------------------------------ names + stickers (OWAN v1 / OHASHI v2)
   Sticker colours carry the model: 若草 = OWAN (v1), 生成り = OHASHI (v2); the drawing is 墨, initials and seal are 朱. */
.manual { --sumi: #2B2824; --shu: #AB3425; --kraft: #D3B184; --wakakusa: #BCB98C; }
.manual .tag.v1 { background: var(--wakakusa); color: var(--sumi); }
.manual .tag.v2 { background: var(--kraft); color: var(--sumi); }
.manual .seg button .nm { display: none; margin-left: 5px; font-weight: 500; letter-spacing: 0.02em; }
@media (min-width: 760px) { .manual .seg button .nm { display: inline; } }

.manual .pick-card .id { display: flex; gap: 16px; align-items: flex-start; }
.manual .pick-card .id > div { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.manual .pick-card .stk, .manual .stk-card .stk { flex: none; height: auto; aspect-ratio: 50.32 / 68;
  filter: drop-shadow(0 1px 1px rgba(42, 39, 48, 0.3)) drop-shadow(0 10px 12px rgba(42, 39, 48, 0.24)); }
.manual .pick-card .stk { width: 92px; transform: rotate(-3deg); margin: 2px 4px 0 2px; background: none; border: 0; object-fit: contain; }
.manual .pick-card h2 small { font: 500 0.62em/1.2 var(--f-jp); color: var(--muted); letter-spacing: 0.04em; }

.manual .stk-pair { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; margin: 18px 0 14px; }
.manual .stk-card { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: clamp(18px, 3vw, 32px); align-items: center; padding: 20px;
  border: 1px solid var(--line2); border-radius: 16px; background: #fff; box-shadow: 0 1px 2px rgba(42, 39, 48, 0.05), 0 16px 34px -24px rgba(42, 39, 48, 0.3); }
.manual .stk-card.k-ohashi { background: linear-gradient(135deg, #fff 45%, rgba(211, 177, 132, 0.3)); }
.manual .stk-card.k-owan { background: linear-gradient(135deg, #fff 45%, rgba(188, 185, 140, 0.34)); }
.manual .stk-card .stk { width: 100%; transform: rotate(-2deg); }
.manual .stk-card.k-owan .stk { transform: rotate(1.6deg); }
.manual .stk-card h4 { font: 600 clamp(1.7rem, 3vw, 2.2rem)/1.1 var(--f-en); letter-spacing: 0.02em; color: var(--sumi); margin: 4px 0 0; }
.manual .stk-card h4 small { white-space: nowrap; margin-left: 8px; font: 700 0.42em/1 var(--f-disp); letter-spacing: 0.1em; color: var(--shu); }
.manual .stk-card p { margin: 8px 0 0; font-size: 14px; line-height: 1.8; color: var(--ink2); }
.manual .stk-card p.acr { font: 500 13.5px/1.7 var(--f-en); color: var(--ink); letter-spacing: 0; }
.manual .stk-card p.acr i { font-style: normal; font-weight: 700; font-size: 1.28em; color: var(--shu); }
@media (max-width: 560px) { .manual .stk-card { grid-template-columns: minmax(0, 1fr); justify-items: center; } .manual .stk-card .stk { max-width: 190px; } .manual .stk-card > div { width: 100%; } }

/* two crests (OWAN, OHASHI) as the brand mark */
.manual .m-head .brand svg { width: 62px; height: 30px; color: var(--sumi); }
.manual .m-foot .brand svg { width: 62px; height: 30px; color: var(--sumi); }