/* This page deliberately uses its own scoped layout, alongside the game UI. */
:root{--flow-border:#765297;--flow-accent:#bdf3dc;--flow-soft:#ffffff0a;--flow-shade:#160c2bd9}
@media(prefers-color-scheme:dark){:root:not([data-theme="light"]){--flow-border:#765297;--flow-accent:#bdf3dc;--flow-soft:#ffffff0a;--flow-shade:#120821e6}}
:root[data-theme="dark"]{--flow-border:#765297;--flow-accent:#bdf3dc;--flow-soft:#ffffff0a;--flow-shade:#120821e6}
body{background:var(--g-deep)}
#app .flow-page{--flow-head:72px;--flow-stage:350px;height:100%;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;background:var(--g-night);color:var(--g-text);scrollbar-width:thin;scrollbar-color:var(--g-edge) var(--g-night);position:relative}
.flow-page *{box-sizing:border-box}
.flow-page :is(h1,h2,h3,p){margin:0;word-break:keep-all;overflow-wrap:normal;line-break:strict}
.flow-page :is(button,a,select,input){-webkit-tap-highlight-color:transparent}
.flow-page :is(button,select,summary,a):focus-visible{outline:3px solid var(--g-mint);outline-offset:4px}
.flow-header{position:sticky;top:0;z-index:40;min-height:72px;display:flex;align-items:center;gap:12px;padding:calc(10px + env(safe-area-inset-top,0px)) 16px 12px;background:var(--g-night);border-bottom:1px solid var(--flow-border)}
.flow-header>strong{font-size:14px;font-weight:900;flex:1;white-space:nowrap}
.flow-chapter-select{min-width:0}
.flow-header select{width:44px;min-height:44px;color:transparent;border:1px solid var(--g-edge);border-radius:12px;background:var(--g-panel);font-size:16px;cursor:pointer;padding:0 5px}
.flow-header option{color:var(--g-text);background:var(--g-night)}
.flow-layout{display:flex;flex-direction:column;padding:0 16px;max-width:1600px;margin:auto}
.flow-copy{min-width:0;order:2}
.flow-chapter{padding:32px 0 44px;border-bottom:1px solid var(--flow-border);min-height:calc(100dvh - var(--flow-head) - var(--flow-stage));scroll-margin-top:calc(var(--flow-head) + var(--flow-stage) + 16px)}
.flow-chapter:last-child{padding-bottom:calc(60px + env(safe-area-inset-bottom,0px));border:0}
.flow-chapter-kicker{font-size:12px;font-weight:800;color:var(--g-muted);display:flex;gap:10px;align-items:center;margin-bottom:20px}
.flow-chapter-kicker>span{color:var(--g-gold);font-size:14px;font-variant-numeric:tabular-nums}
.flow-chapter .g-ribbon{font-size:11px;padding:6px 20px;min-width:156px;margin-bottom:18px}
.flow-copy h1{font-family:var(--g-display-font);font-size:clamp(23px,6.35vw,28px);line-height:1.6;letter-spacing:-.04em;margin-bottom:18px}
.flow-copy h1>span{display:block;white-space:nowrap}
.flow-copy h2{font-family:var(--g-display-font);font-size:26px;line-height:1.65;letter-spacing:-.035em;margin-bottom:22px;text-wrap:balance}
.flow-copy p{font-size:14px;line-height:2;color:var(--g-muted);margin:16px 0}
.flow-copy .flow-lead{font-size:16px;line-height:1.95;color:var(--g-text);font-weight:700}
.flow-copy .flow-note{font-size:12px;line-height:1.95}
.flow-total{margin:28px 0 22px;display:grid;gap:4px}
.flow-total>strong{font-family:var(--g-display-font);font-size:clamp(38px,11vw,49px);line-height:1.3;letter-spacing:-.055em;color:var(--g-gold);white-space:nowrap}
.flow-total>span{font-size:12px;color:var(--g-muted)}
.flow-pop-split{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:18px 0;border-top:1px solid var(--flow-border);border-bottom:1px solid var(--flow-border);margin-bottom:24px}
.flow-pop-split>div{display:grid;gap:6px;min-width:0}
.flow-pop-split b{font-size:18px;letter-spacing:-.04em;white-space:nowrap}.flow-pop-split small{font-size:11px;margin-left:3px}.flow-pop-split span{font-size:12px;color:var(--g-muted)}
.flow-one-fact{margin:26px 0;display:grid;gap:8px}
.flow-one-fact>b{font-family:var(--g-display-font);font-size:40px;line-height:1.4;letter-spacing:-.045em;color:var(--g-gold);white-space:nowrap}.flow-one-fact small{font-size:18px;margin-left:6px}.flow-one-fact>span{font-size:12px;color:var(--g-muted)}
.flow-day-path{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:24px 0}.flow-day-path>span{font-size:12px;padding:9px 12px;border:1px solid var(--g-edge);border-radius:10px;background:var(--g-panel);font-weight:800;white-space:nowrap}.flow-day-path>i,.flow-infection>i{font-style:normal;color:var(--g-gold)}
.flow-time-picks{display:flex;gap:8px;margin:26px 0 18px}.flow-time-picks button{flex:1;min-width:0;min-height:44px;border:1px solid var(--g-edge);background:var(--g-panel);border-radius:12px;color:var(--g-text);font-size:14px;font-weight:800}.flow-time-picks [aria-pressed="true"]{border:2px solid var(--g-gold);color:var(--g-gold);background:var(--g-purple)}
#app .flow-copy .button{display:inline-flex;align-items:center;justify-content:center;margin:12px 0 16px;width:100%;font-size:16px;min-height:54px;line-height:1.5;white-space:nowrap}
#app .flow-copy .primary{font-size:18px;min-height:60px}
.flow-details{margin-top:24px;border-top:1px solid var(--flow-border)}
.flow-details summary{cursor:pointer;min-height:54px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:13px;font-weight:800;list-style:none;color:var(--g-muted);padding:10px 0}.flow-details summary::-webkit-details-marker{display:none}.flow-details summary::after{content:'＋';color:var(--g-gold);font-size:20px}.flow-details[open] summary::after{content:'−'}
.flow-details>div{padding-bottom:12px}.flow-details p{font-size:13px}.flow-details a,.flow-source-list a{color:var(--g-mint);text-underline-offset:4px}
.flow-type-list{list-style:none;margin:0;padding:0}.flow-type-list li{padding:10px 0;display:grid;gap:6px;color:var(--g-muted);font-size:12px;border-bottom:1px solid var(--g-line)}.flow-type-list b{font-size:16px;color:var(--g-text)}
.flow-schedule{display:grid;gap:12px;margin:22px 0;color:var(--g-muted);font-size:12px}.flow-schedule>strong{color:var(--g-text);margin-bottom:4px}.flow-schedule>div{display:grid;grid-template-columns:1fr auto;gap:6px 16px}.flow-schedule i{grid-column:1/-1;display:block;height:5px;background:linear-gradient(to right,var(--g-gold) var(--share),var(--g-panel) var(--share));border-radius:4px}
.flow-route-picker{display:grid;grid-template-columns:minmax(0,1fr) 18px minmax(0,1fr);gap:8px;align-items:end;margin:24px 0 8px}.flow-route-picker>span{align-self:center;color:var(--g-gold);margin-top:22px}
.flow-route-picker label,.flow-origin{display:grid;gap:9px;font-size:12px;color:var(--g-muted)}
.flow-page select:not([data-chapter]){width:100%;min-width:0;min-height:48px;padding:10px 28px 10px 12px;font:700 16px var(--font);color:var(--g-text);background:var(--g-panel);border:1px solid var(--g-edge);border-radius:12px;text-overflow:ellipsis}
.flow-copy .flow-route-result{font-size:12px;color:var(--g-mint);white-space:pre-line}
.flow-infection{display:grid;grid-template-columns:1fr 16px 1.3fr 16px 1fr;gap:7px;align-items:center;margin:26px 0;text-align:center}.flow-infection>span{padding:14px 4px;background:var(--g-panel);border:1px solid var(--g-edge);border-radius:12px;font-size:13px;line-height:1.6;font-weight:800}.flow-infection>span:last-child{color:var(--g-orange);border-color:var(--g-orange)}
.flow-origin{margin-top:28px}.flow-alarm{display:grid;grid-template-columns:1fr auto;align-items:center;font-size:14px;font-weight:700;margin-top:26px}.flow-alarm>output{color:var(--g-gold)}.flow-alarm>input{grid-column:1/-1}
.flow-check{display:flex;gap:12px;align-items:center;min-height:48px;font-size:13px;color:var(--g-muted);line-height:1.7;margin:10px 0}.flow-check>input{width:22px;height:22px;flex:0 0 22px;accent-color:var(--g-gold)}
.flow-comparison{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:20px 0;border-block:1px solid var(--flow-border);margin:24px 0}.flow-comparison>div{display:grid;gap:7px;min-width:0}.flow-comparison span{font-size:12px;color:var(--g-muted)}.flow-comparison b{font-size:20px;white-space:nowrap;letter-spacing:-.06em}.flow-comparison>div:nth-child(2) b{color:var(--g-mint)}.flow-comparison small{font-size:11px;color:var(--g-muted)}.flow-comparison>p{grid-column:1/-1;font-size:11px;margin:0}
.flow-source-list{list-style:none;padding:0;margin:26px 0}.flow-source-list li{display:grid;gap:6px;border-top:1px solid var(--flow-border);padding:18px 0;font-size:13px;line-height:1.8;word-break:keep-all}.flow-source-list li>span{font-size:11px;color:var(--g-muted)}.flow-source-list a{min-height:28px;width:fit-content}
.flow-next{width:100%;min-height:48px;padding:10px 0;margin-top:24px;display:flex;align-items:center;justify-content:space-between;border:0;border-top:1px solid var(--g-line);background:transparent;color:var(--g-gold);font-size:13px;font-weight:800}
.flow-next>span{font-size:20px}.flow-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.flow-stage{order:1;position:sticky;top:var(--flow-head);z-index:20;display:flex;flex-direction:column;min-width:0;background:var(--g-deep);border:1px solid var(--flow-border);border-radius:0 0 20px 20px;box-shadow:0 10px 25px var(--g-shadow);overflow:hidden;margin:0 -1px}
.flow-stage-top{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:40px;padding:9px 12px;background:var(--g-panel);font-size:11px;line-height:1.5}.flow-stage-top>div{display:flex;gap:7px;align-items:center;min-width:0}.flow-stage-top strong{font-size:12px;white-space:nowrap}.flow-stage-top>span{color:var(--g-gold);white-space:nowrap;font-weight:800;font-variant-numeric:tabular-nums}.flow-live-dot{display:block;width:6px;height:6px;border-radius:50%;background:var(--g-mint);box-shadow:0 0 9px var(--g-mint)}
.flow-map-wrap{position:relative;height:clamp(284px,38dvh,360px);min-height:284px;isolation:isolate;overflow:hidden;background:var(--map-night)}
.flow-map{position:absolute;inset:0}.flow-map canvas{display:block;width:100%;height:100%;touch-action:none}
.flow-map-stat{position:absolute;top:8px;left:8px;pointer-events:none;background:linear-gradient(to right,var(--flow-shade),transparent);padding:4px 8px;border-radius:10px;width:fit-content;max-width:calc(100% - 16px)}.flow-map-stat>span{font-size:9px;line-height:1.4;color:var(--g-muted);display:block}.flow-map-stat>strong{display:flex;align-items:baseline;gap:5px;line-height:1.25}.flow-map-stat b{font-size:20px;font-family:var(--g-display-font);line-height:1.25;letter-spacing:-.045em;color:var(--g-gold);font-variant-numeric:tabular-nums;white-space:nowrap}.flow-map-stat small{font-size:10px}
.flow-map-tools{position:absolute;right:8px;bottom:8px;display:flex;gap:6px}#app .flow-map-tools .g-tool{width:44px;height:44px;min-height:44px;padding:0 3px;font-size:24px;line-height:1.2;border-radius:13px}#app .flow-map-tools [data-fit]{font-size:10px}
.flow-map-legend{position:absolute;left:8px;bottom:8px;right:164px;pointer-events:none;font-size:9px;line-height:1.6;text-align:left;color:var(--g-muted);text-shadow:0 1px 3px var(--g-deep);background:var(--flow-shade);border-radius:8px;padding:3px 6px}
.flow-stage-controls{padding:8px 12px 10px;display:grid;gap:5px;background:var(--g-deep)}
.flow-timeline{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;align-items:center;gap:12px}.flow-timeline>div{min-width:0}.flow-timeline label{font-size:10px;color:var(--g-muted);display:flex;align-items:center;justify-content:space-between;gap:8px}.flow-timeline output{font-size:12px;font-weight:800;color:var(--g-gold);white-space:nowrap}#app .flow-timeline .g-tool{font-size:18px;border-radius:12px}
.flow-page input[type="range"]{appearance:none;-webkit-appearance:none;background:transparent;min-height:36px;width:100%;padding:0;margin:0;accent-color:var(--g-gold);cursor:ew-resize}
.flow-page input[type="range"]::-webkit-slider-runnable-track{height:6px;border-radius:5px;background:var(--g-purple-light)}.flow-page input[type="range"]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:24px;height:24px;margin-top:-9px;border-radius:50%;background:var(--g-gold);border:3px solid var(--g-text);box-shadow:0 2px 0 var(--g-orange-low)}.flow-page input[type="range"]::-moz-range-track{height:6px;border-radius:5px;background:var(--g-purple-light)}.flow-page input[type="range"]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--g-gold);border:3px solid var(--g-text)}
.flow-stage-controls .flow-demo-caption{font-size:9px;line-height:1.6;color:var(--g-muted);text-align:center;min-height:15px}.flow-compute-status{display:flex;justify-content:center;align-items:center;gap:8px;min-height:16px}.flow-compute-status>p{font-size:9px;color:var(--g-muted);line-height:1.5}.flow-compute-status>button{font-size:11px;min-height:44px;border:1px solid var(--g-edge);background:var(--g-panel);border-radius:10px;color:var(--g-text);padding:4px 9px;white-space:nowrap}
.flow-result-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 6px}.flow-result-tabs button{min-height:44px;background:var(--g-panel);color:var(--g-muted);border:1px solid var(--g-edge);border-radius:10px;font-size:12px;font-weight:800}.flow-result-tabs [aria-pressed="true"]{color:var(--g-mint);border:2px solid var(--g-mint);background:var(--g-purple)}
.flow-page [hidden]{display:none!important}
@media(max-width:899px) and (max-height:740px){.flow-stage-top{min-height:34px}.flow-stage-controls{padding-top:6px;padding-bottom:7px}.flow-stage-controls .flow-demo-caption{display:none}.flow-header{min-height:64px;padding-top:8px;padding-bottom:10px}.flow-compute-status{min-height:12px}.flow-chapter{padding-top:26px}}
@media(min-width:900px){
 .flow-header{height:80px;padding:14px 32px;gap:16px}.flow-header>strong{font-size:18px}.flow-header select{width:auto;min-width:208px;color:var(--g-text);padding:8px 14px;font-size:13px;font-weight:800}
 .flow-layout{display:grid;grid-template-columns:minmax(320px,.82fr) minmax(0,1.35fr);gap:clamp(32px,4vw,80px);padding:32px clamp(32px,4.5vw,88px) 0;align-items:start}
 .flow-copy{order:0}.flow-chapter{padding:20px 0 72px;min-height:calc(100dvh - 112px);scroll-margin-top:112px;margin-bottom:24px}.flow-chapter-kicker{margin-bottom:28px}.flow-chapter .g-ribbon{margin-bottom:24px}
 .flow-copy h1{font-size:clamp(25px,2.5vw,39px);line-height:1.65;margin-bottom:24px}.flow-copy h2{font-size:clamp(27px,2.4vw,36px);line-height:1.7}.flow-copy p{font-size:15px;line-height:2.1;margin:20px 0}.flow-copy .flow-lead{font-size:17px;line-height:2}.flow-copy .flow-note{font-size:12px}.flow-total{margin-top:36px}.flow-total>strong{font-size:clamp(43px,4.8vw,66px)}.flow-pop-split b{font-size:clamp(17px,1.55vw,23px)}.flow-one-fact>b{font-size:48px}.flow-comparison b{font-size:clamp(20px,2vw,29px)}
 .flow-stage{order:0;top:112px;height:calc(100dvh - 144px);max-height:900px;min-height:470px;border-radius:24px;margin:0;align-self:start}.flow-stage-top{padding:16px 20px;min-height:62px;font-size:14px}.flow-stage-top strong{font-size:15px}.flow-map-wrap{height:auto;flex:1;min-height:240px}.flow-map-stat{top:20px;left:20px;padding:8px 12px}.flow-map-stat>span{font-size:12px}.flow-map-stat b{font-size:clamp(32px,3.5vw,52px)}.flow-map-stat small{font-size:16px}.flow-map-tools{bottom:14px;right:18px;gap:12px}.flow-map-legend{font-size:11px;bottom:14px;left:16px;right:196px;padding:5px}
 .flow-stage-controls{padding:16px 20px 18px;gap:10px}.flow-timeline{gap:16px}.flow-timeline label{font-size:12px}.flow-timeline output{font-size:14px}.flow-page input[type="range"]{min-height:44px}.flow-stage-controls .flow-demo-caption{font-size:11px}.flow-compute-status>p{font-size:11px}.flow-result-tabs{margin:0 0 6px}.flow-result-tabs button{font-size:13px}
}
@media(prefers-reduced-motion:reduce){.flow-page{scroll-behavior:auto}.flow-page *{transition:none!important}}
/* The mobile contents control keeps its name visible with the native picker. */
@media(max-width:899px){.flow-chapter-select{position:relative;width:44px;height:44px;flex:0 0 44px}.flow-chapter-select::after{content:'目次';position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;color:var(--g-text);font-size:11px;font-weight:900}}
.flow-page input[type="range"]{min-height:44px}
.flow-source-list a{display:inline-flex;align-items:center;min-height:44px}
/* Population-model download: one short description for every archive file. */
.flow-download{margin:32px 0 40px;padding:26px 0 30px;border-block:2px solid var(--g-edge)}
.flow-copy .flow-download h3{font-family:var(--g-display-font);font-size:22px;line-height:1.65;letter-spacing:-.04em;color:var(--g-text);text-wrap:balance}
.flow-download .g-ribbon{margin-bottom:16px}
.flow-copy .flow-download-caution{font-size:13px;color:var(--g-text);line-height:1.95;padding-left:14px;border-left:3px solid var(--g-gold)}
#app .flow-copy .flow-download-button{gap:16px;font-size:18px;white-space:nowrap;margin-bottom:12px}
.flow-copy .flow-download-size{margin:0 0 24px;font-size:11px;line-height:1.8;color:var(--g-muted);font-variant-numeric:tabular-nums}
.flow-download-files{list-style:none;padding:0;margin:0}
.flow-download-files li{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.2fr);align-items:baseline;gap:10px;padding:12px 0;border-top:1px solid var(--g-line);font-size:11px;line-height:1.8;word-break:keep-all;overflow-wrap:normal}
.flow-download-files code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px;color:var(--g-mint);letter-spacing:-.04em;white-space:nowrap}
.flow-download-files li>span{color:var(--g-muted)}
.flow-download-sources{list-style:none;padding:0;margin:18px 0}
.flow-download-sources li{display:grid;gap:8px;padding:12px 0;border-bottom:1px solid var(--g-line);font-size:12px;line-height:1.95;word-break:keep-all}
.flow-download-sources a{display:inline-flex;align-items:center;min-height:44px}
.flow-download-sources li>span{font-size:11px;color:var(--g-muted)}
.flow-download-credit{margin:18px 0;padding:0 0 0 14px;border-left:2px solid var(--g-edge);user-select:text;-webkit-user-select:text}
.flow-download-credit p{overflow-wrap:anywhere;word-break:keep-all}
@media(min-width:900px){.flow-download{margin:40px 0 48px;padding:32px 0}.flow-copy .flow-download h3{font-size:25px}.flow-download-files li{font-size:12px;gap:16px}.flow-download-files code{font-size:11px}}
.flow-download-date{white-space:nowrap}
.flow-download .flow-details a{display:inline-flex;align-items:center;min-height:44px}
/* 2026-10-30 スマホではデモを小さくして、解説に画面の半分以上を残す */
@media(max-width:899px){
.flow-map-wrap{height:clamp(164px,25dvh,216px);min-height:164px}
.flow-stage-top{min-height:30px;padding:4px 12px}
.flow-stage-controls{padding:3px 10px 5px;gap:0}
.flow-stage-controls .flow-demo-caption{display:none}
.flow-timeline{grid-template-columns:40px minmax(0,1fr) 40px;gap:8px}
.flow-timeline label{line-height:1.3}
#app .flow-timeline .g-tool{width:40px;height:40px;min-height:40px}
.flow-page input[type="range"]{min-height:24px}
.flow-map-stat{top:4px;left:4px;padding:2px 6px}.flow-map-stat b{font-size:17px}
#app .flow-map-tools .g-tool{width:38px;height:38px;min-height:38px;font-size:20px}#app .flow-map-tools [data-fit]{font-size:10px}
.flow-map-tools{right:6px;bottom:6px;gap:4px}.flow-map-legend{left:6px;bottom:6px;right:136px}
.flow-compute-status{min-height:0}
.flow-copy p,.flow-copy .flow-lead{text-wrap:balance}
}