/* Layout concept: a launch-page narrative. A dark photographic prologue, then one claim per
   chapter with one hero element, and every table behind a "Go deeper" door (drawer or appendix).
   Colour is semantic: red = the protocol and the key number; slate = what happened; three fixed
   hazard hues; owner colours for Red Cross / government / operators. */
:root {
  --bg: #ffffff;
  --paper: #f6f3ee;
  --surface: #ffffff;
  --surface-2: #f1efeb;
  --ink: #15171a;
  --ink-2: #4a4d52;
  --muted: #7b7f86;
  --line: #e3e0da;
  --accent: #d0021b;
  --accent-ink: #ffffff;
  --accent-soft: #fdecee;
  --observed: #6b7b8c;
  --rain: #2b6cb0; --glof: #0e8f8b; --mass: #b7791f;
  --own-rc: #d0021b; --own-gov: #3d5a80; --own-op: #7a5c99;
  --good: #1a8f3c; --warn: #e3a008; --serious: #e8743b; --crit: #b42318;
  --good-ink: #12722f; --bad-ink: #a3201a;
  --night: #0e1113; --night-2: #171b1e; --night-ink: #eceae6; --night-muted: #9aa1a8; --night-line: #2a3035;
  --shadow: 0 1px 2px rgba(20, 22, 26, .05), 0 10px 30px rgba(20, 22, 26, .07);
  --f-display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --f-body: "Mukta", "Noto Sans Devanagari", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --nav: 56px;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111315; --paper: #16181b; --surface: #1b1e21; --surface-2: #23272b; --ink: #ecebe8; --ink-2: #c4c6c9;
    --muted: #8d939a; --line: #2e3338; --accent: #ff4d5e; --accent-ink: #111315; --accent-soft: #3a1a1e;
    --observed: #93a3b4; --rain: #5b9be0; --glof: #2fb8b3; --mass: #d9a23f;
    --own-rc: #ff4d5e; --own-gov: #7ea2d3; --own-op: #b39ad6; --good-ink: #4cc36e; --bad-ink: #ff8a80;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111315; --paper: #16181b; --surface: #1b1e21; --surface-2: #23272b; --ink: #ecebe8; --ink-2: #c4c6c9;
  --muted: #8d939a; --line: #2e3338; --accent: #ff4d5e; --accent-ink: #111315; --accent-soft: #3a1a1e;
  --observed: #93a3b4; --rain: #5b9be0; --glof: #2fb8b3; --mass: #d9a23f;
  --own-rc: #ff4d5e; --own-gov: #7ea2d3; --own-op: #b39ad6; --good-ink: #4cc36e; --bad-ink: #ff8a80;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav) + 56px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.0625rem/1.65 var(--f-body); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--f-display); text-wrap: balance; margin: 0; }
p { margin: 0; }
button, select, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.num, .mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.note { font-size: .875rem; color: var(--muted); line-height: 1.5; max-width: 70ch; }
.body { max-width: 62ch; color: var(--ink-2); }
.body.tight { padding-left: 1.1em; display: grid; gap: 6px; margin: 0 0 18px; }
.wrap { max-width: 76rem; margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }

/* ------------------------------------------------------------ top navigation */
.topnav { position: fixed; z-index: 40; inset: 0 0 auto; height: var(--nav); display: flex; align-items: center; gap: 14px;
  padding: 0 max(18px, env(safe-area-inset-right, 0px)) 0 max(18px, env(safe-area-inset-left, 0px));
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent); transition: background .3s, color .3s; }
.topnav.on-dark { background: color-mix(in srgb, #0e1113 55%, transparent); color: #eceae6; border-bottom-color: transparent; }
.brand { display: grid; line-height: 1.1; text-decoration: none; }
.brand b { font: 800 .98rem var(--f-display); font-stretch: 112%; }
.brand span { font-size: .78rem; color: var(--muted); }
.topnav.on-dark .brand span { color: #9aa1a8; }
.tag { font: 600 .7rem var(--f-body); letter-spacing: .08em; text-transform: uppercase; border: 1px solid currentColor; opacity: .7; border-radius: 999px; padding: 2px 8px; white-space: nowrap; }
.ticks { flex: 1; display: flex; justify-content: center; gap: 4px; min-width: 0; overflow: hidden; }
.ticks a { display: flex; align-items: center; gap: 6px; padding: 6px 9px; border-radius: 999px; text-decoration: none; font-size: .82rem; color: inherit; opacity: .62; white-space: nowrap; }
.ticks a b { font: 700 .72rem var(--f-mono); }
.ticks a:hover, .ticks a.active { opacity: 1; background: color-mix(in srgb, currentColor 9%, transparent); }
.ticks a.active b { color: var(--accent); }
.navtools { display: flex; gap: 6px; }
.ghost { background: transparent; border: 1px solid transparent; border-radius: 999px; padding: 5px 11px; font-size: .84rem; color: inherit; }
.ghost:hover { border-color: currentColor; }
.ghost[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }
.ghost.icon { width: 34px; padding: 5px 0; }
.progress { position: absolute; inset: auto 0 -1px 0; height: 2px; }
.progress i { display: block; height: 100%; width: 0; background: var(--accent); }

/* sticky numbers */
.numbers { position: fixed; z-index: 39; top: var(--nav); inset-inline: 0; display: flex; justify-content: center; gap: clamp(14px, 3vw, 40px); flex-wrap: wrap;
  padding: 7px 16px; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); transform: translateY(-110%); transition: transform .35s ease; }
.numbers.show { transform: none; }
.numbers div { display: flex; align-items: baseline; gap: 7px; white-space: nowrap; }
.numbers b { font: 700 1rem var(--f-display); font-stretch: 108%; font-variant-numeric: tabular-nums; transition: color .3s; }
.numbers b.flash { color: var(--accent); }
.numbers span { font-size: .76rem; color: var(--muted); }

/* ------------------------------------------------------------ prologue */
.prologue { position: relative; min-height: 100svh; display: grid; align-items: end; color: #f2f0ec; background: #0e1113; overflow: hidden; }
.prologue-bg { position: absolute; inset: 0; background: url("../img/hero-langtang-lirung.webp") center 30% / cover no-repeat; transform: scale(1.04); animation: drift 30s ease-out forwards; }
.prologue-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(14,17,19,.25) 0%, rgba(14,17,19,.45) 40%, rgba(14,17,19,.94) 82%); }
@keyframes drift { to { transform: scale(1); } }
.prologue-inner { position: relative; max-width: 76rem; margin: 0 auto; width: 100%; padding: 30vh max(20px, env(safe-area-inset-right, 0px)) 9vh max(20px, env(safe-area-inset-left, 0px)); display: grid; gap: 22px; }
.kicker { font: 600 .8rem var(--f-body); letter-spacing: .12em; text-transform: uppercase; color: #c9cdd1; }
.prologue h1 { font-size: clamp(2.5rem, 1.2rem + 5.4vw, 5.8rem); font-weight: 800; font-stretch: 114%; line-height: .98; letter-spacing: -.02em; max-width: 15ch; }
.count { color: #ff4d5e; font-variant-numeric: tabular-nums; }
.prologue .lede { font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); line-height: 1.5; color: #d9dde0; max-width: 46ch; }
.fiction { font-size: .9rem; color: #a9b0b6; }
.linkish { background: none; border: 0; padding: 0; color: #f2f0ec; text-decoration: underline; text-underline-offset: 3px; font-size: inherit; }
.scrollcue { justify-self: start; text-decoration: none; font-weight: 600; padding: 10px 16px; border: 1px solid rgba(255,255,255,.35); border-radius: 999px; }
.scrollcue:hover { color: #fff; border-color: #fff; }
.credit, figcaption[data-credit] { font-size: .72rem; color: var(--muted); }
.prologue .credit { position: absolute; right: 14px; bottom: 10px; color: #8a9096; }

/* ------------------------------------------------------------ chapters */
.chapter { padding-block: clamp(72px, 10vw, 140px); border-top: 1px solid var(--line); }
.chapter.paper { background: var(--paper); }
.chapter.dark { background: var(--night); color: var(--night-ink); border-top: 0; --line: var(--night-line); --muted: var(--night-muted); --ink-2: #c5cacf; --surface: var(--night-2); --surface-2: #20262b; }
.chapter > .wrap { display: grid; gap: clamp(28px, 4vw, 48px); }
.chead { display: grid; gap: 14px; max-width: 58rem; }
.chead.split-head { max-width: none; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: end; gap: 32px; }
.cnum { font: 600 .8rem var(--f-body); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.chapter h2 { font-size: clamp(2rem, 1.1rem + 3.2vw, 3.6rem); font-weight: 760; font-stretch: 108%; line-height: 1.04; letter-spacing: -.015em; }
.chead .lede { font-size: clamp(1.08rem, 1rem + .4vw, 1.3rem); color: var(--ink-2); max-width: 56ch; line-height: 1.5; }
.sub { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.hero-num { display: grid; gap: 6px; border-left: 3px solid var(--accent); padding-left: 18px; }
.hero-num b { font: 800 clamp(2.6rem, 2rem + 3vw, 4.8rem)/1 var(--f-display); font-stretch: 110%; letter-spacing: -.02em; }
.hero-num span { color: var(--ink-2); font-size: .98rem; line-height: 1.45; max-width: 34ch; }

/* summary */
.story { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px 48px; counter-reset: s; }
.story li { display: grid; gap: 4px; padding-top: 14px; border-top: 1px solid var(--line); }
.story li b { font: 700 1.02rem var(--f-display); }
.story li span { color: var(--ink-2); }
.glance-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.gstep { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; display: grid; gap: 10px; align-content: start; position: relative; overflow: hidden; }
.gstep::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: var(--c); }
.gstep .gn { display: flex; justify-content: space-between; align-items: baseline; }
.gstep .gn b { font: 800 1.5rem var(--f-display); font-stretch: 112%; }
.gstep .gn span { font: 600 .74rem var(--f-mono); color: var(--muted); }
.gstep dl { margin: 0; display: grid; gap: 6px; font-size: .9rem; }
.gstep dt { font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.gstep dd { margin: 0; color: var(--ink-2); line-height: 1.4; }
.cannot { border: 1px solid var(--line); border-left: 4px solid var(--ink); border-radius: 0 var(--radius) var(--radius) 0; padding: 20px 24px; background: var(--surface); display: grid; gap: 10px; }
.cannot h3 { font-size: 1.1rem; }
.cannot ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; color: var(--ink-2); }
.paths { font-size: .92rem; color: var(--muted); }

/* replay */
.replay { position: relative; margin-top: 8px; }
.map-xl { height: min(82vh, 760px); min-height: 440px; }
.map-sm { height: 300px; border-radius: 12px; overflow: hidden; }
.replay-hud { position: absolute; top: 16px; right: max(16px, env(safe-area-inset-right, 0px)); width: min(340px, calc(100% - 32px)); display: grid; gap: 12px; padding: 16px; border-radius: 14px;
  background: rgba(14,17,19,.74); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); color: #eceae6; border: 1px solid rgba(255,255,255,.08); }
.replay-hud .seg button { color: #eceae6; }
.clock { display: grid; }
.clock span { font: 700 3.2rem/1 var(--f-mono); letter-spacing: -.02em; }
.clock small { color: #aab1b7; font-size: .9rem; }
.hud-stats { display: grid; gap: 10px; }
.hud-stats div { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: baseline; }
.hud-stats b { font: 700 1.25rem var(--f-display); font-variant-numeric: tabular-nums; min-width: 4.5ch; text-align: right; }
.hud-stats span { font-size: .82rem; color: #b9c0c6; line-height: 1.3; }
.scrubber { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: center; }
.play { width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--accent); color: var(--accent-ink); font-size: 1rem; }
.scrub-track { position: relative; padding-bottom: 26px; }
.scrub-track input { width: 100%; accent-color: var(--accent); }
.scrub-ticks { position: absolute; inset: auto 0 0; height: 24px; font: .7rem var(--f-mono); color: var(--muted); }
.scrub-ticks span { position: absolute; transform: translateX(-50%); white-space: nowrap; }
.scrub-ticks span::before { content: ""; position: absolute; left: 50%; top: -10px; width: 1px; height: 8px; background: currentColor; }
.chain figcaption, .fig figcaption { font-size: .85rem; color: var(--muted); }
.split-photo { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 28px; align-items: center; }
.photo { margin: 0; display: grid; gap: 6px; }
.photo img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 12px; display: block; }
.facts { display: grid; gap: 18px; }
.facts div { display: grid; gap: 2px; }
.facts b { font: 800 2.4rem/1 var(--f-display); font-stretch: 110%; }
.facts span { color: var(--ink-2); font-size: .95rem; }

/* deeper strip */
.deeper { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding-top: 18px; border-top: 1px solid var(--line); }
.deeper > span { font: 600 .74rem var(--f-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-right: 6px; }
.deeper button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .88rem; }
.deeper button::after { content: " →"; color: var(--muted); }
.deeper button:hover { border-color: var(--accent); color: var(--accent); }

/* hazard */
.hazards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.hz { background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); display: grid; grid-template-rows: auto 1fr; }
.hz img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; }
.hz .hz-b { padding: 18px; display: grid; gap: 10px; align-content: start; }
.hz h3 { font-size: 1.15rem; }
.hz p { color: var(--ink-2); font-size: .95rem; line-height: 1.5; }
.warnbar { display: grid; gap: 4px; }
.warnbar .track { height: 6px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.warnbar .track i { display: block; height: 100%; border-radius: 999px; }
.warnbar span { font: 600 .78rem var(--f-mono); color: var(--ink-2); }
.hz small { color: var(--muted); font-size: .78rem; }
.fig { margin: 0; display: grid; gap: 10px; }
.fighead { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; }
.fighead b { color: var(--ink); font-size: .98rem; }
.legend { display: inline-flex; flex-wrap: wrap; gap: 4px 14px; font-size: .8rem; color: var(--ink-2); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; vertical-align: -1px; }
.own.rc { background: var(--own-rc); } .own.gov { background: var(--own-gov); } .own.op { background: var(--own-op); }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(20px, 3vw, 44px); align-items: start; }
.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; display: grid; gap: 12px; align-content: start; }
.card h3 { font-size: 1.05rem; line-height: 1.25; }
.hbar { display: grid; grid-template-columns: 9.5rem 1fr 4.5rem; gap: 10px; align-items: center; font-size: .9rem; padding: 4px 0; cursor: default; }
.hbar .t { height: 10px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.hbar .t i { display: block; height: 100%; border-radius: 999px; background: var(--rain); transition: width .5s; }
.hbar b { font: 600 .85rem var(--f-mono); text-align: right; }
.hbar:hover { color: var(--accent); }
.lake-row { display: grid; grid-template-columns: 1.5rem 1fr auto; gap: 10px; font-size: .9rem; padding: 6px 0; border-bottom: 1px solid var(--line); }
.lake-row b { font: 600 .85rem var(--f-mono); }

/* protocol */
.steps { display: grid; gap: 12px; }
.step { display: grid; grid-template-columns: 6.5rem minmax(0, 2fr) minmax(0, 1.3fr); gap: 24px; background: var(--surface); border-radius: var(--radius); padding: 22px 24px; box-shadow: var(--shadow); align-items: start; border-left: 5px solid var(--c); }
.step .sn { display: grid; gap: 6px; }
.step .sn b { font: 800 2.6rem/1 var(--f-display); color: var(--c); }
.step .sn span { font: 600 .74rem var(--f-mono); color: var(--muted); }
.step h3 { font-size: 1.35rem; margin-bottom: 6px; }
.step p { color: var(--ink-2); line-height: 1.5; }
.step dl { margin: 0; display: grid; gap: 8px; font-size: .9rem; }
.step dt { font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.step dd { margin: 0; color: var(--ink-2); }
.rules { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.rule { display: grid; gap: 6px; padding-top: 14px; border-top: 2px solid var(--ink); }
.rule b { font: 700 1.05rem var(--f-display); }
.rule span { color: var(--ink-2); font-size: .95rem; }

/* tools */
.tool { background: var(--surface); border-radius: 18px; box-shadow: var(--shadow); padding: clamp(18px, 2.4vw, 30px); display: grid; gap: 18px; }
.tool-q { font-size: 1.02rem; color: var(--ink-2); }
.tool-q b { color: var(--ink); }
.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.presets button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .88rem; }
.presets button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.presets button .rec { color: var(--accent); font-weight: 700; }
.presets button[aria-pressed="true"] .rec { color: inherit; }
.dial { position: relative; padding-bottom: 24px; }
.dial input { width: 100%; accent-color: var(--accent); }
.dial-scale { display: flex; justify-content: space-between; font-size: .75rem; color: var(--muted); }
.dial-scale #dial-limit-label { position: absolute; transform: translateX(-50%); bottom: 0; color: var(--accent); font-weight: 600; }
.dial-limit { position: absolute; top: 2px; width: 2px; height: 22px; background: var(--accent); }
.dial-out { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.dial-out div { display: grid; gap: 2px; }
.dial-out b { font: 800 2.2rem/1 var(--f-display); font-stretch: 108%; font-variant-numeric: tabular-nums; }
.dial-out span { font-size: .85rem; color: var(--ink-2); line-height: 1.35; }
.dots { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 10px; }
.dot { display: grid; justify-items: center; gap: 4px; font-size: .72rem; color: var(--muted); text-align: center; line-height: 1.2; }
.dot i { width: var(--s, 22px); height: var(--s, 22px); border-radius: 50%; border: 2px solid var(--observed); transition: background .35s, border-color .35s, transform .35s; }
.dot.hit i { background: var(--accent); border-color: var(--accent); transform: scale(1.08); }
.dot.hit { color: var(--ink); }
.formula { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; font-size: 1.05rem; padding: 14px 18px; background: var(--surface); border-radius: 12px; box-shadow: var(--shadow); width: fit-content; max-width: 100%; }
.formula span { display: grid; }
.formula small { font-size: .74rem; color: var(--muted); }
.lt-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 24px; }
.lt-side { display: grid; gap: 16px; align-content: start; }
.big-out { display: grid; gap: 4px; }
.big-out b { font: 800 3rem/1 var(--f-display); font-stretch: 110%; font-variant-numeric: tabular-nums; }
.big-out span { color: var(--ink-2); font-size: .92rem; }
.stopwatch { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-top: 10px; }
.stopwatch label, .sliders label, .custom-row label, .controls label { display: grid; gap: 4px; font-size: .78rem; color: var(--muted); }
.stopwatch output, .sliders output, .custom-row output, .controls output { font: 600 .9rem var(--f-mono); color: var(--ink); }
input[type=range] { accent-color: var(--accent); width: 220px; max-width: 100%; }
.scrub-track input[type=range], .dial input[type=range] { width: 100%; max-width: none; }
.nowrap { white-space: nowrap; }
#scrub-ticks span.nolab { width: 2px; }
.scrub-ticks span.r { transform: translateX(-100%); } .scrub-ticks span.r::before { left: auto; right: 0; }
.scrub-ticks span.l { transform: none; } .scrub-ticks span.l::before { left: 0; }
@media (max-width: 1350px) { #ticks a span { display: none; } }
.custom { margin-top: 12px; font-size: .88rem; }
.custom summary { cursor: pointer; color: var(--muted); }
.custom-row { display: flex; flex-wrap: wrap; gap: 14px 24px; margin-top: 10px; }
select { border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: 5px 8px; }
.left-list { display: grid; gap: 4px; font-size: .88rem; }
.left-list div { display: flex; justify-content: space-between; gap: 10px; border-bottom: 1px solid var(--line); padding: 4px 0; }
.left-list b { font: 600 .82rem var(--f-mono); }
.status-list { display: grid; gap: 8px; }
.status-list div { display: grid; grid-template-columns: 14px 1fr; gap: 10px; align-items: start; font-size: .94rem; }
.status-list i { width: 12px; height: 12px; border-radius: 50%; margin-top: 6px; }
.status-list small { display: block; color: var(--muted); font-size: .8rem; }

/* people */
.journey { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.journey > div { padding: 20px; display: grid; gap: 8px; align-content: start; border-right: 1px solid var(--line); position: relative; }
.journey > div:last-child { border-right: 0; }
.journey b { font: 800 1.35rem var(--f-display); }
.journey .when { font: 600 .74rem var(--f-mono); color: var(--muted); }
.journey p { color: var(--ink-2); font-size: .92rem; line-height: 1.45; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chip { font-size: .72rem; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-2); white-space: nowrap; }
.chip.rc { border-color: var(--own-rc); color: var(--own-rc); } .chip.gov { border-color: var(--own-gov); color: var(--own-gov); } .chip.op { border-color: var(--own-op); color: var(--own-op); }
.filter { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.filter button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 4px 12px; font-size: .84rem; }
.filter button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.actlist { display: grid; gap: 14px; }
.actgroup h4 { font: 600 .74rem var(--f-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.act { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .94rem; cursor: pointer; background: none; border-top: 0; border-left: 0; border-right: 0; text-align: left; width: 100%; color: inherit; }
.act:hover span:first-child { color: var(--accent); }

/* cost */
.cost-bar { position: relative; padding-top: 22px; }
.bar { display: flex; height: 44px; border-radius: 10px; overflow: hidden; gap: 2px; background: var(--surface-2); }
.bar > span { display: block; height: 100%; transition: flex-grow .5s ease; position: relative; }
.bar > span.ghost-seg { background: repeating-linear-gradient(135deg, var(--surface-2) 0 6px, color-mix(in srgb, var(--ink) 12%, transparent) 6px 7px); }
.ceiling { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); transition: left .5s; }
.ceiling span { position: absolute; top: -2px; transform: translateX(-50%); font: 600 .72rem var(--f-mono); white-space: nowrap; background: var(--surface); padding: 0 4px; }
.pips { display: flex; flex-wrap: wrap; gap: 10px 22px; font-size: .9rem; }
.pips span { display: inline-flex; align-items: center; gap: 6px; }
.pips i { width: 18px; height: 18px; border-radius: 50%; display: inline-grid; place-items: center; color: #fff; font-style: normal; font-size: .72rem; font-weight: 700; }
.sliders { display: flex; flex-wrap: wrap; gap: 16px 36px; }

/* decisions */
.stepper { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.dec { background: var(--surface); border-radius: 18px; box-shadow: var(--shadow); padding: clamp(18px, 2.4vw, 30px); display: grid; gap: 16px; }
.dec-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.dec-nav button { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); font: 600 .8rem var(--f-mono); }
.dec-nav button.done { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.dec-nav button.cur { outline: 2px solid var(--accent); outline-offset: 2px; }
.dec h3 { font-size: 1.5rem; }
.dec .why { color: var(--ink-2); }
.opts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.opt { text-align: left; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); padding: 14px; display: grid; gap: 6px; align-content: start; }
.opt:hover { border-color: var(--ink-2); }
.opt[aria-pressed="true"] { border: 2px solid var(--accent); padding: 13px; background: var(--accent-soft); }
.opt b { font: 700 1rem var(--f-display); }
.opt small { color: var(--ink-2); font-size: .86rem; line-height: 1.4; }
.opt .rec { font: 600 .68rem var(--f-body); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.dec-foot { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.btn { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 8px 16px; font-size: .92rem; }
.btn.primary, button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.conseq { position: sticky; top: calc(var(--nav) + 64px); background: var(--surface); border-radius: 18px; box-shadow: var(--shadow); padding: 22px; display: grid; gap: 14px; }
.conseq h4 { font: 600 .74rem var(--f-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.conseq div { display: grid; gap: 2px; }
.conseq b { font: 800 1.8rem/1 var(--f-display); font-variant-numeric: tabular-nums; }
.conseq span { font-size: .84rem; color: var(--ink-2); }

/* appendix */
.appendix { background: var(--paper); }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.tabs button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: .88rem; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.ap { display: grid; gap: 34px; }
.ap[hidden] { display: none !important; }
.panel-block { display: grid; gap: 12px; }
.panel-block h3 { font-size: 1.25rem; }
.tbl-wrap { overflow-x: auto; max-height: 560px; overflow-y: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .86rem; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font: 600 .7rem var(--f-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); background: var(--surface-2); position: sticky; top: 0; z-index: 1; }
td.num, th.num { text-align: right; font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.heat { font-size: .78rem; }
.heat td, .heat th { text-align: center; padding: 6px 4px; }
.heat td:first-child, .heat th:first-child { text-align: left; }
.tbl-wrap:has(.heat) { max-height: none; }
.methods { margin: 0; display: grid; gap: 14px; max-width: 74ch; }
.methods dt { font-weight: 700; font-family: var(--f-display); }
.methods dd { margin: 0; color: var(--ink-2); }
.gloss { margin: 0; display: grid; grid-template-columns: 12rem 1fr; gap: 8px 20px; }
.gloss dt { font-weight: 700; }
.gloss dd { margin: 0; color: var(--ink-2); }
.refs { font-size: .85rem; display: grid; gap: 6px; padding-left: 1.4em; color: var(--ink-2); }
.controls { display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: end; }
.kpi-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.kpi-row > div { background: var(--surface); padding: 12px 14px; display: grid; gap: 2px; }
.kpi-row b { font: 700 1.35rem var(--f-display); font-variant-numeric: tabular-nums; }
.kpi-row span { font-size: .78rem; color: var(--muted); line-height: 1.35; }
.statement { font-size: 1rem; color: var(--ink-2); max-width: 74ch; }
.matrix { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; }
.mcol { display: grid; gap: 6px; align-content: start; font-size: .84rem; }
.mcol header { font: 600 .7rem var(--f-body); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); border-bottom: 2px solid var(--accent); padding-bottom: 4px; }
.mcard { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 8px; display: grid; gap: 4px; }
.msgs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.msg { border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 0 10px 10px 0; padding: 12px; display: grid; gap: 6px; background: var(--surface); font-size: .9rem; }
.msg .lang { font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.check-flag { font-size: .7rem; color: var(--muted); border: 1px dashed var(--muted); border-radius: 4px; padding: 0 4px; white-space: nowrap; }
.inline { display: inline-flex; gap: 6px; align-items: center; font-size: .88rem; }
.seg { display: inline-flex; border: 1px solid color-mix(in srgb, currentColor 25%, transparent); border-radius: 999px; overflow: hidden; width: fit-content; }
.seg button { border: 0; background: transparent; padding: 6px 12px; font-size: .84rem; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }

/* drawer, popover, tip, review */
.scrim { position: fixed; inset: 0; z-index: 59; background: rgba(10, 12, 14, .35); }
.drawer { position: fixed; z-index: 60; top: 0; right: 0; bottom: 0; width: min(760px, 100vw); background: var(--bg); box-shadow: -20px 0 50px rgba(0,0,0,.18); transform: translateX(105%); transition: transform .35s cubic-bezier(.2,.8,.2,1); display: grid; grid-template-rows: auto 1fr; }
.drawer.open { transform: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.drawer-head b { font: 700 1.05rem var(--f-display); }
.drawer-body { overflow-y: auto; padding: 20px; padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px)); display: grid; gap: 18px; align-content: start; }
.drawer-body .tbl-wrap { max-height: none; }
.drawer.review { width: min(560px, 100vw); }
.review-tools { display: flex; flex-wrap: wrap; gap: 6px; }
.review-tools input { flex: 1; min-width: 160px; border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; background: var(--surface); }
.review-tools button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 5px 12px; font-size: .86rem; }
.crit { display: grid; gap: 6px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.crit b { font-size: .95rem; }
.crit small { color: var(--muted); }
.verdict { display: flex; gap: 4px; flex-wrap: wrap; }
.verdict button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 2px 10px; font-size: .78rem; }
.verdict button[aria-pressed="true"][data-v=ok] { background: var(--good); color: #fff; border-color: var(--good); }
.verdict button[aria-pressed="true"][data-v=q] { background: var(--warn); color: #141414; border-color: var(--warn); }
.verdict button[aria-pressed="true"][data-v=no] { background: var(--crit); color: #fff; border-color: var(--crit); }
.verdict button[aria-pressed="true"][data-v=na] { background: var(--ink-2); color: var(--bg); }
.crit textarea { width: 100%; min-height: 2.2em; border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; background: var(--surface); font-size: .86rem; resize: vertical; }
.review-fab { position: fixed; z-index: 45; right: max(18px, env(safe-area-inset-right, 0px)); bottom: max(18px, env(safe-area-inset-bottom, 0px)); border: 0; border-radius: 999px; padding: 12px 18px; background: var(--ink); color: var(--bg); font-weight: 600; box-shadow: var(--shadow); }
.crit-chip { display: none; }
body.review .crit-chip { display: inline-flex; font-size: .78rem; border: 1px dashed var(--accent); color: var(--accent); border-radius: 999px; padding: 3px 10px; background: transparent; }
.pop { position: fixed; z-index: 70; max-width: 320px; background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 12px 14px; font-size: .88rem; line-height: 1.45; }
.pop b { display: block; font-family: var(--f-display); margin-bottom: 4px; }
.tip { position: fixed; z-index: 71; pointer-events: none; background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); padding: 8px 10px; font-size: .82rem; line-height: 1.4; max-width: 280px; }
.g { text-decoration: underline dotted color-mix(in srgb, currentColor 55%, transparent); text-underline-offset: 3px; cursor: help; }
.x { width: 18px; height: 18px; border-radius: 50%; border: 1px solid currentColor; background: transparent; font: 600 .66rem var(--f-body); line-height: 1; padding: 0; vertical-align: 2px; opacity: .6; }
.x:hover { opacity: 1; color: var(--accent); }

/* charts */
.chart { width: 100%; display: block; overflow: visible; }
.chart text { fill: var(--muted); font: 11px var(--f-body); }
.chart .lbl { fill: var(--ink-2); font-weight: 600; }
.chart .grid line { stroke: var(--line); }
.chart .axis path, .chart .axis line { stroke: var(--line); }
.chapter.dark .chart text { fill: #9aa1a8; }
.chapter.dark .chart .lbl { fill: #dde1e4; }
.sensor-handle { cursor: ew-resize; }
.maplibregl-popup-content { background: var(--surface) !important; color: var(--ink); border-radius: 8px !important; font: .85rem/1.4 var(--f-body); }
.maplibregl-ctrl-attrib { font-size: 10px; }
.map-off { display: grid; place-items: center; text-align: center; color: var(--muted); background: var(--surface-2); font-size: .9rem; padding: 20px; }

.foot { padding-block: 40px; border-top: 1px solid var(--line); font-size: .8rem; color: var(--muted); }

@media (max-width: 1100px) {
  .ticks a span { display: none; }
  .glance-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step { grid-template-columns: 4.5rem minmax(0, 1fr); }
  .step dl { grid-column: 2; }
  .lt-grid, .stepper { grid-template-columns: minmax(0, 1fr); }
  .conseq { position: static; }
  .matrix { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dial-out { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .ticks, .tag { display: none; }
  .navtools .ghost:not(.icon) { padding: 5px 8px; font-size: .78rem; }
  .story, .two, .three, .hazards, .rules, .split-photo, .opts, .msgs, .journey, .chead.split-head { grid-template-columns: minmax(0, 1fr); }
  .journey > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .glance-steps { grid-template-columns: minmax(0, 1fr); }
  .dots { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .hbar { grid-template-columns: 7rem 1fr 3.5rem; }
  .gloss { grid-template-columns: minmax(0, 1fr); }
  .numbers { gap: 10px; font-size: .9em; }
  .numbers div:nth-child(n+4) { display: none; }
  .replay-hud { position: static; width: auto; margin: 12px 20px 0; }
  .matrix { grid-template-columns: minmax(0, 1fr); }
}