*{box-sizing:border-box} :root{color-scheme:dark;--paper:#eef0e9;--muted:#b8c9cc;--line:#34505b;--coral:#eda28d}body{margin:0;background:#081a23;color:var(--paper);font-family:"Yu Gothic UI","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;min-height:100svh}button{font:inherit;cursor:pointer;touch-action:manipulation;color:inherit}main{max-width:430px;margin:auto;padding:12px 14px max(12px,env(safe-area-inset-bottom))}header{display:flex;align-items:center;justify-content:space-between;gap:12px}h1{margin:0;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-weight:600;font-size:27px;letter-spacing:2px}header button,footer button{background:none;border:0;color:var(--muted);font-size:13px;min-height:44px;padding:8px 12px}nav{display:flex;gap:4px;margin:2px 0 0;border-bottom:1px solid var(--line)}nav button{flex:1;min-height:44px;background:none;border:0;border-bottom:2px solid transparent;color:var(--muted);font-size:14px}nav button.active{color:var(--paper);border-bottom-color:var(--coral)}nav button.cleared::after{content:" ✓";color:#edbfa3}.status{display:flex;justify-content:space-between;gap:8px;padding:12px 0;color:var(--muted);font-size:12px}.status b{margin-left:5px;font-size:14px;color:var(--paper);font-variant-numeric:tabular-nums;font-weight:600}.sea{position:relative;width:min(100%,calc((100svh - 254px)*.6923));min-width:min(100%,280px);margin:auto;aspect-ratio:360/520;overflow:hidden;border:1px solid #2f4953;background:#0a2530;isolation:isolate}canvas,#sockets{position:absolute;inset:0;width:100%;height:100%}#sockets{pointer-events:none}.socket{position:absolute;transform:translate(-50%,-50%);width:44px;height:44px;border:0;background:transparent;padding:0;pointer-events:auto;border-radius:50%}.socket:hover{outline:1px solid #d7e4de88}.socket[aria-disabled=true]{cursor:default}.socket:focus-visible{outline:2px solid #fff1d4;outline-offset:3px}.goal-label,.origin-label,.supply-label{position:absolute;pointer-events:none;font-size:12px;line-height:1.4;color:#e7e8df}.goal-label{left:50%;top:3.4%;transform:translateX(-50%)}.origin-label{left:50%;bottom:2.5%;transform:translateX(-50%)}.supply-label{left:5%;top:5.3%;color:#bed0d6;font-size:11px}.current{position:absolute;bottom:10px;left:10px;font-size:11px;color:#afc5ca}.current span{font-size:18px}#message{font-size:13px;line-height:1.55;min-height:40px;margin:10px 0 8px;color:#c8d5d5}.controls{display:flex;gap:9px}.controls button,#next,#understood{min-height:48px;border-radius:4px;border:1px solid #e6b49a;padding:10px 16px}#reset{flex:1;background:transparent;border-color:#58707a;color:#d5dfdf}#start{flex:1.6;background:#efbba0;color:#172a31;font-weight:600}#start[aria-disabled=true]{background:#304650;color:#bdced0;border-color:#58707a;cursor:default}footer{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}#result{display:flex;gap:10px;align-items:center;justify-content:space-between;border-top:1px solid #58707a;padding:12px 0}#result[hidden]{display:none}#result h2{margin:0 0 5px;font-size:19px;font-weight:600}#result p{font-size:13px;line-height:1.5;color:#c8d5d5;margin:0}#next{flex-shrink:0;background:#efbba0;color:#172a31}dialog{width:min(92vw,430px);background:#102b36;color:var(--paper);border:1px solid #607b86;border-radius:6px;padding:20px;max-height:90svh;overflow:auto}dialog::backdrop{background:#020b12b0}dialog h2{margin:0;font-size:20px}dialog ol{padding-left:24px}dialog li,dialog p{font-size:14px;line-height:1.8}dialog li+li{margin-top:12px}dialog .note{font-size:12px;color:#b8c9cc;border-top:1px solid #3b5864;padding-top:10px}#understood{background:#efbba0;color:#172a31;width:100%}button:focus-visible{outline:2px solid #fff1d4;outline-offset:3px}@media(max-width:340px){main{padding:8px 10px}.status{font-size:11px}.status b{font-size:13px}h1{font-size:25px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

#stagePicker{flex:1;display:flex;gap:10px;justify-content:center;align-items:center;color:var(--paper)}#chapterTitle{font-size:12px;color:var(--muted)}#prevLevel,#nextLevel{flex:0 0 44px;font-size:24px}nav button[aria-disabled=true]{color:#8ba0a6}#legend{display:flex;flex-wrap:wrap;gap:4px 12px;margin-top:7px;font-size:11px;color:#d4deda;min-height:0}#legend:empty{display:none}.feature.boost{color:#ead19c}.feature.deposit{color:#b8d7c8}.feature.mud{color:#d4bba1}.feature.gate{color:#b9d5ea}.feature.checkpoint{color:#edc4b1}.sea{width:min(100%,calc((100svh - 280px)*.6923))}#levelDialog{width:min(94vw,430px)}#levelList section{margin:16px 0}#levelList h3{font-size:14px;color:var(--muted);margin:0 0 8px}.level-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.level-grid button{min-height:46px;padding:8px 2px;border:1px solid #58707a;background:#153340;border-radius:3px;font-size:14px}.level-grid button[aria-current=step]{border-color:#efbba0;color:#f4ceb8}dialog h3{font-size:16px;margin-top:24px}dialog dt{font-size:14px;margin-top:12px;font-weight:600}dialog dd{margin:4px 0 10px;font-size:13px;line-height:1.7;color:#c6d5d7}footer{gap:4px;flex-wrap:wrap}#cleared{font-size:11px}button[hidden]{display:none}

#currentRule,#routeSummary{font-size:12px;line-height:1.6;margin:7px 0;color:#d7dfda}#currentRule{color:#b8cbd1}#gateStatus{display:grid;gap:4px;font-size:12px;line-height:1.6}.gate-open{color:#c8e4b9}.gate-closed{color:#edd6b6}#routeDetails{font-size:12px;margin:7px 0;border-bottom:1px solid #34505b;padding-bottom:7px}#routeDetails summary{cursor:pointer;min-height:44px;display:flex;align-items:center;color:#edc3ab}#routeDetails ol{padding-left:22px;line-height:1.8;margin-top:0}#routeDetails li+li{margin-top:6px}.cost-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.7}.cost-table th,.cost-table td{text-align:left;border-bottom:1px solid #34505b;padding:8px 4px}.cost-table th{color:#c6d6d4}.sea{width:min(100%,calc((100svh - 360px)*.6923))}

#routeDetails summary::before{content:'▸';margin-right:7px}#routeDetails[open] summary::before{content:'▾'}

.header-actions{display:flex;align-items:center;gap:0}.header-actions button{padding:8px;font-size:12px}.sound-controls{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:10px 0 2px;color:#b8c9cc;font-size:11px}.sound-controls button{min-height:44px;border:1px solid #3e5962;background:transparent;border-radius:3px;padding:6px 10px;font-size:11px}.sound-controls button[aria-pressed=true]{border-color:#84998a;color:#d9e4cb}.sound-controls label{display:flex;align-items:center;gap:5px;margin-left:auto}.sound-controls input{width:72px;height:44px;accent-color:#eab69d}#rewardText{color:#f1d49a;font-size:12px;margin:0 0 5px}#rewardText:empty{display:none}#result.won{border-color:#e1bc83;background:linear-gradient(90deg,#d9a17619,transparent);padding:14px 8px;margin-top:8px;border-bottom:1px solid #a18153}#result.won h2{color:#ffe4c0}#levelDialog{width:min(94vw,900px);padding:16px 20px}#levelDialog>header{position:sticky;top:-16px;background:#102b36;padding:10px 0;z-index:2}#completionBar{width:100%;height:8px;accent-color:#efba9a;margin-bottom:14px}.stage-filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}.stage-filters button,.stage-filters select{min-height:44px;padding:8px 10px;border:1px solid #486570;border-radius:3px;background:#13313b;color:#cadbdc;font:inherit;font-size:12px}.stage-filters button[aria-pressed=true]{border-color:#edb99e;color:#f5d5bf}.stage-filters label{display:flex;align-items:center;gap:6px;font-size:12px;margin-left:auto}.level-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.level-grid .stage-tile{display:flex;flex-direction:column;align-items:center;gap:5px;padding:10px 6px;min-width:0;text-align:center;border:1px solid #3c5c65;background:#102e38;position:relative}.stage-tile canvas{position:static;inset:auto;display:block;width:83px;height:120px;border:1px solid #37545d;pointer-events:none}.stage-tile strong{font-size:15px;color:#e2e8dd}.stage-tile .tile-record{font-size:11px;color:#b7c9cc}.stage-tile .tile-meta{font-size:10px;color:#a5bac1}.stage-tile .tile-traits{font-size:10px;line-height:1.6;color:#c5bcab;overflow-wrap:anywhere}.level-grid .stage-tile.completed{border-color:#698579;background:#16373c}.stage-tile.completed strong{color:#f1d3a6}#levelList h3{border-bottom:1px solid #34505b;padding-bottom:8px}#emptyStages{color:#bdccd0}@media(max-width:650px){.level-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}#levelDialog{padding:12px}}@media(max-width:420px){.level-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stage-filters label{width:100%;margin-left:0}.header-actions button{padding:8px 6px}.sound-controls label{margin-left:0}}
[hidden]{display:none!important}.title-screen{position:relative;isolation:isolate;width:min(100%,520px);min-height:max(640px,100svh);margin:auto;padding:48px 28px 24px;display:flex;flex-direction:column;align-items:center;overflow:hidden}.title-screen>canvas{z-index:-1}.title-copy{text-align:center}.title-reading{font-family:serif;font-size:12px;letter-spacing:5px;margin:0 0 9px;color:#c8cfc4}.title-copy h1{font-size:49px;letter-spacing:7px;color:#f0e1c8}.title-tagline{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:15px;line-height:2;letter-spacing:.7px;color:#d3d9cc;margin-top:20px}.title-menu{width:min(100%,300px);margin-top:auto;padding-top:280px;display:flex;flex-direction:column;gap:8px}.title-menu button{min-height:46px;background:#0a242de6;border:1px solid #52717a;color:#dbe4de;border-radius:3px;font-size:14px}.title-menu .title-primary{background:#e9b99b;color:#152c34;border-color:#e9b99b;font-weight:600}.title-menu p{font-size:11px;text-align:center;margin:6px 0;color:#b4c6c9}.title-menu #titleProgress:empty{display:none}.title-menu .title-subject{margin-top:3px;color:#95b1ba}.header-actions{gap:0}.header-actions button{padding:8px 5px;font-size:11px}#storyDialog{width:min(92vw,470px);background:#102c37;padding:22px 25px}.story-copy{padding:18px 0 25px;min-height:250px}.story-copy h2{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:24px;font-weight:500;color:#ebd6b6;margin:0 0 24px}.story-copy p{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:15px;line-height:2.1;margin:0 0 16px;color:#d9e1d6}#storyCounter{font-size:12px;color:#a9bec6;margin:0}.story-actions{display:flex;justify-content:space-between;gap:8px}.story-actions button,.ending-button{min-height:46px;padding:9px 18px;border:1px solid #53717c;background:transparent;color:#dbe3db;border-radius:3px}#storyNext{margin-left:auto;background:#e9b99b;color:#19303a;border-color:#e9b99b}.ending-button{width:100%;margin:12px 0;font-size:13px}@media(max-height:720px){.title-screen{padding-top:30px}.title-menu{padding-top:245px}.title-tagline{font-size:14px;margin-top:12px}.title-copy h1{font-size:43px}}@media(max-width:340px){.header-actions button{font-size:10px;padding:8px 3px}.title-screen{padding-left:20px;padding-right:20px}}

/* ブラウザ配布前の読みやすさと小画面対応 */
.header-actions{flex-wrap:wrap;justify-content:flex-end}.header-actions button{font-size:14px;padding:8px 5px}.status{font-size:14px}.status b{margin-left:3px}.sound-controls,.sound-controls button,.stage-filters button,.stage-filters select,.stage-filters label,footer,#cleared,#chapterTitle,#legend,#currentRule,#routeSummary,#gateStatus,#routeDetails,#message,.cost-table,dialog dd{font-size:14px}.stage-tile .tile-record,.stage-tile .tile-meta,.stage-tile .tile-traits{font-size:12px}.title-menu p{font-size:14px}.title-menu .title-subject{font-size:12px}.title-screen{padding-top:max(30px,env(safe-area-inset-top));padding-bottom:max(24px,env(safe-area-inset-bottom));min-height:max(700px,100svh)}.title-menu{padding-top:245px}.load-error{position:relative;z-index:10;max-width:430px;margin:16px auto;padding:16px;background:#263943;color:#fff1d4;line-height:1.8}#aboutDialog a{color:#efc8aa;overflow-wrap:anywhere}#analyticsChoices button{min-height:44px;padding:10px 12px;margin:4px 6px 4px 0;border:1px solid #79929b;background:#153640;border-radius:3px}#aboutDialog h3{margin-top:20px}.sound-controls label{flex-wrap:wrap}.stage-filters select{max-width:100%}@media(max-width:340px){header{gap:6px}header h1{font-size:23px}.header-actions button{font-size:14px;padding:8px 3px}.status{font-size:14px;flex-wrap:wrap}.status b{font-size:14px}}@media(max-height:500px) and (min-width:600px){.title-screen{min-height:700px}}

/* Safariのフローティングバーから操作を離す。短い画面ではスクロールを許す。 */
.play-actions{margin:12px 0 10px}.play-actions #result{margin:0 0 10px}.play-actions #result:not([hidden])+.controls #reset{flex:1}.play-actions #result:not([hidden])+.controls #start[hidden]{display:none}
@media(max-width:600px){
 html{scroll-padding-top:calc(16px + env(safe-area-inset-top,0px));scroll-padding-bottom:calc(120px + env(safe-area-inset-bottom,0px))}
 main{padding-top:calc(12px + env(safe-area-inset-top,0px));padding-bottom:calc(140px + env(safe-area-inset-bottom,0px))}
 .title-screen{padding-bottom:calc(100px + env(safe-area-inset-bottom,0px))}
 .play-actions #result{flex-wrap:wrap}.play-actions #next{min-height:48px}
 dialog{max-height:calc(100svh - 140px);margin-top:calc(24px + env(safe-area-inset-top,0px));margin-bottom:120px}
}