/* Layout: 全画面のジオラマ。左上に題、右上に切替、右に階の案内、下に視点。パネルはすりガラス */
:root{
  --bg:#dfe6ea;
  --glass:rgba(250,251,250,.74);
  --glass-line:rgba(40,52,48,.14);
  --fg:#1d2624;
  --muted:#58625f;
  --accent:#2c6a4c;
  --accent-ink:#ffffff;
  --wood:#a8733f;
  --chip:rgba(40,52,48,.07);
  --f-display:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",sans-serif;
  --f-body:"BIZ UDPGothic","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#141a1d;--glass:rgba(24,30,32,.74);--glass-line:rgba(220,235,228,.14);--fg:#e8eeeb;--muted:#a3afab;
  --accent:#7cc39c;--accent-ink:#0f1a15;--wood:#d39a62;--chip:rgba(220,235,228,.08);color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#141a1d;--glass:rgba(24,30,32,.74);--glass-line:rgba(220,235,228,.14);--fg:#e8eeeb;--muted:#a3afab;
  --accent:#7cc39c;--accent-ink:#0f1a15;--wood:#d39a62;--chip:rgba(220,235,228,.08);color-scheme:dark}
[hidden]{display:none!important}
html,body{height:100%;overflow:hidden;margin:0}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:13px;line-height:1.35;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0}
#sky{position:fixed;inset:0;background:linear-gradient(#b9d3e6,#e9eef0 60%,#eef0ec);transition:background 1.2s}
canvas#c{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}
.panel{position:fixed;z-index:3;background:var(--glass);border:1px solid var(--glass-line);border-radius:10px;
  -webkit-backdrop-filter:blur(14px) saturate(1.3);backdrop-filter:blur(14px) saturate(1.3);box-shadow:0 4px 18px rgba(0,0,0,.08)}
#title{top:calc(10px + env(safe-area-inset-top,0px));left:max(12px,env(safe-area-inset-left,0px));padding:9px 12px 8px;max-width:min(370px,calc(100vw - 24px))}
#title h1{font-family:var(--f-display);font-size:22px;line-height:1.15;margin:0;letter-spacing:.02em;text-wrap:balance}
#title .lead{font-size:13px;margin:3px 0 0;color:var(--fg)}
#title dl{display:flex;flex-wrap:wrap;gap:2px 12px;margin:6px 0 0;font-size:12px}
#title dl div{display:flex;gap:4px;align-items:baseline}
#title dt{color:var(--muted)}
#title dd{margin:0;font-weight:700;font-variant-numeric:tabular-nums}
#title .tline{display:flex;align-items:center;justify-content:space-between;gap:8px}
#titleMore{display:inline-block;font:inherit;font-size:11.5px;background:var(--chip);border:0;border-radius:5px;padding:3px 9px;color:var(--fg);cursor:pointer;white-space:nowrap}
#titleMore:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
#title[data-open="false"] #titleBody{display:none}
#title .about{display:none;margin:7px 0 0;padding-top:6px;border-top:1px dashed var(--glass-line);font-size:11px;line-height:1.45;color:var(--muted)}
#title .about b{color:var(--fg)}
#credit .short{display:none}
#ctrl{top:calc(10px + env(safe-area-inset-top,0px));right:max(12px,env(safe-area-inset-right,0px));padding:6px;display:flex;flex-direction:column;gap:5px}
.seg{display:flex;background:var(--chip);border-radius:7px;padding:2px;gap:2px}
.seg button,.chip{font:inherit;font-size:12.5px;border:0;background:transparent;color:var(--fg);padding:4px 9px;border-radius:5px;cursor:pointer;white-space:nowrap}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);font-weight:700}
.seg button:focus-visible,.chip:focus-visible,.fl:focus-visible,#floorsToggle:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
#views{bottom:calc(10px + env(safe-area-inset-bottom,0px));left:50%;transform:translateX(-50%);padding:5px;display:flex;gap:3px;max-width:calc(100vw - 24px);overflow-x:auto;scrollbar-width:none}
.chip{background:var(--chip)}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);font-weight:700}
#floors{right:max(12px,env(safe-area-inset-right,0px));top:calc(132px + env(safe-area-inset-top,0px));width:236px;padding:7px 6px 6px;max-height:calc(100% - 200px);overflow-y:auto}
#floors h2{font-family:var(--f-display);font-size:15px;margin:0 4px 4px;display:flex;justify-content:space-between;align-items:baseline}
#floors h2 small{font-family:var(--f-body);font-weight:400;font-size:11px;color:var(--muted)}
.fl{display:grid;grid-template-columns:52px 1fr;gap:6px;width:100%;text-align:left;font:inherit;font-size:12px;color:var(--fg);
  background:transparent;border:0;border-top:1px dashed var(--glass-line);padding:3px 4px;cursor:pointer;line-height:1.25}
.fl .lv{font-family:var(--f-mono);font-size:11.5px;color:var(--muted);white-space:nowrap}
.fl b{font-weight:700}
.fl span.d{color:var(--muted);display:block;font-size:11px}
.fl:hover{background:var(--chip)}
.fl[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.fl[aria-pressed="true"] .lv,.fl[aria-pressed="true"] span.d{color:var(--accent-ink);opacity:.85}
.fl.static{cursor:default;opacity:.75}
.fl.static:hover{background:transparent}
#floors.behind{visibility:hidden}
#floorsToggle{font:inherit;font-size:11px;background:var(--chip);border:0;border-radius:5px;padding:2px 8px;margin-left:6px;color:var(--fg);cursor:pointer}
#floors[data-open="false"]{padding:6px}
#floors[data-open="false"] #flist{display:none}
#floors[data-open="false"] h2{margin:0}
#floors[data-open="false"] h2 small{display:none}
#compass{cursor:pointer}
#compass:focus-visible{outline:2px solid var(--accent);border-radius:50%}
.row2{display:flex;gap:3px}
.row2 .chip{flex:1;text-align:center;padding:4px 6px}
#settings{right:max(12px,env(safe-area-inset-right,0px));top:calc(132px + env(safe-area-inset-top,0px));width:250px;padding:8px 10px 9px;z-index:4;display:flex;flex-direction:column;gap:2px}
#settings h2{font-family:var(--f-display);font-size:15px;margin:0 0 4px;display:flex;justify-content:space-between;align-items:center}
#settings label{display:flex;justify-content:space-between;font-size:12px;margin-top:4px}
#settings output{font-family:var(--f-mono);font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
#settings input[type=range]{width:100%;accent-color:var(--accent);margin:0}
#settings button{font:inherit;font-size:11.5px;background:var(--chip);border:0;border-radius:5px;padding:3px 9px;color:var(--fg);cursor:pointer}
#setReset{margin-top:7px;align-self:flex-start}
#settings .note{margin:4px 0 0;font-size:10.5px;color:var(--muted)}
#settings h3{font-size:12.5px;margin:9px 0 0;padding-top:7px;border-top:1px dashed var(--glass-line)}
#settings .qrow{display:flex;justify-content:space-between;align-items:center;font-size:12px}
#settings .seg button{background:transparent;padding:3px 10px}
#settings .seg button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);font-weight:700}
#settings .seg button:disabled{opacity:.45;cursor:not-allowed}
#texStatus{left:50%;transform:translateX(-50%);bottom:calc(58px + env(safe-area-inset-bottom,0px));padding:4px 11px;font-size:12px;z-index:3;white-space:nowrap}
#texStatus .bar{display:block;height:3px;margin-top:3px;border-radius:2px;background:var(--chip);overflow:hidden}
#texStatus .bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .3s}
#settings button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
#foot{position:fixed;z-index:3;left:max(12px,env(safe-area-inset-left,0px));bottom:calc(10px + env(safe-area-inset-bottom,0px));display:flex;align-items:flex-end;gap:8px;pointer-events:none}
#compass{width:46px;height:46px;pointer-events:auto}
#credit{font-size:10.5px;line-height:1.3;color:var(--muted);max-width:330px;padding:5px 8px;pointer-events:auto}
#credit b{color:var(--fg)}
#credit a,#title .about a{color:var(--accent);font-weight:700;white-space:nowrap;text-decoration:underline;text-underline-offset:2px}
#credit a:focus-visible,#title .about a:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-radius:2px}
.lbl{position:fixed;z-index:1;left:0;top:0;transform:translate(-50%,-100%);font-size:11.5px;font-weight:700;white-space:nowrap;pointer-events:none;
  padding:2px 6px;border-radius:4px;background:var(--glass);border:1px solid var(--glass-line);color:var(--fg)}
.lbl.main{font-family:var(--f-display);font-size:13.5px;background:var(--accent);color:var(--accent-ink);border-color:transparent}
.lbl::after{content:"";position:absolute;left:50%;top:100%;width:1px;height:14px;background:currentColor;opacity:.45}
#hint{top:50%;left:50%;transform:translate(-50%,-50%);padding:8px 14px;font-size:13px;transition:opacity .8s;pointer-events:none}
#info{left:50%;transform:translateX(-50%);bottom:calc(58px + env(safe-area-inset-bottom,0px));padding:6px 12px;font-size:12.5px;max-width:calc(100vw - 24px);text-align:center}
#info b{font-family:var(--f-display);font-size:14px;margin-right:6px}
#loading{inset:0;display:grid;place-items:center;font-size:14px;color:var(--muted);background:var(--bg);z-index:5;transition:opacity .6s}

.chip.tourchip{background:var(--accent);color:var(--accent-ink);font-weight:700}
.chip.tourchip[aria-pressed="true"]{outline:2px solid var(--accent);outline-offset:1px}
#tour{left:50%;transform:translateX(-50%);bottom:calc(58px + env(safe-area-inset-bottom,0px));width:min(600px,calc(100vw - 24px));padding:8px 12px 8px;z-index:4}
#tour .thead{display:flex;align-items:baseline;gap:8px}
#tourNo{font-family:var(--f-mono);font-size:11.5px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
#tourTitle{font-family:var(--f-display);font-size:18px;line-height:1.25;margin:0;text-wrap:balance}
#tourText{margin:4px 0 6px;font-size:14px;line-height:1.55}
#tour .tctl{display:flex;flex-wrap:wrap;gap:4px}
#tour .tctl button{font:inherit;font-size:12.5px;background:var(--chip);border:0;border-radius:5px;padding:4px 11px;color:var(--fg);cursor:pointer}
#tour .tctl button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
#tour #tourPause{background:var(--accent);color:var(--accent-ink);font-weight:700}
#tour #tourEnd{margin-left:auto}
body.touring #info,body.touring #hint{display:none!important}

/* ---- はじめの画面 (ガラスのカード。SoraTwin の起動画面と同じ作り) ---- */
#start{position:fixed;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;padding:16px max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px));background:radial-gradient(ellipse at center,rgba(2,10,18,.18),rgba(2,10,18,.5));transition:opacity .45s}
#start.out{opacity:0;pointer-events:none}
.scard{position:relative;width:min(760px,100%);max-height:calc(100% - 8px);overflow:auto;color:#f2fbff;border-radius:20px;padding:16px 22px 14px;
  background:linear-gradient(135deg,rgba(16,34,50,.66),rgba(12,28,42,.5) 45%,rgba(24,80,110,.52));border:1px solid rgba(255,255,255,.38);
  -webkit-backdrop-filter:blur(22px) saturate(160%);backdrop-filter:blur(22px) saturate(160%);
  box-shadow:0 30px 80px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.55),inset 0 0 40px rgba(0,200,255,.14);text-shadow:0 1px 2px rgba(0,0,0,.55)}
.scard::before{content:"";position:absolute;inset:-40% -10% auto -10%;height:60%;pointer-events:none;background:linear-gradient(170deg,rgba(255,255,255,.2),rgba(255,255,255,0) 60%);transform:rotate(-4deg)}
.shead{display:flex;align-items:center;gap:10px}
.stag{font-family:var(--f-mono);font-size:11px;letter-spacing:.35em;color:#8fe9ff}
.sbadge{font-size:11px;font-weight:700;padding:1px 7px;border-radius:4px;background:rgba(255,255,255,.18);color:#e8f8ff;letter-spacing:.06em}
#startTitle{font-family:var(--f-display);font-size:clamp(30px,6vw,46px);line-height:1.1;margin:4px 0 2px;letter-spacing:.06em;text-shadow:0 1px 2px rgba(0,0,0,.6),0 0 22px rgba(0,200,255,.35)}
.slead{margin:0;font-size:clamp(14px,2.2vw,17px);color:#e8f8ff}
.sfacts{display:flex;flex-wrap:wrap;gap:4px 14px;margin:8px 0 12px;font-size:13px;color:#cfefff;font-variant-numeric:tabular-nums}
.schoice{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.sbtn{font:inherit;text-align:left;cursor:pointer;border-radius:12px;padding:12px 14px;color:#f2fbff;display:flex;flex-direction:column;gap:3px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.35);box-shadow:inset 0 1px 0 rgba(255,255,255,.35);text-shadow:inherit;transition:transform .15s,box-shadow .15s}
.sbtn b{font-family:var(--f-display);font-size:20px;letter-spacing:.06em}
.sbtn small{font-size:12.5px;color:#d9f3ff}
.sbtn.primary{color:#062a1c;text-shadow:0 1px 0 rgba(255,255,255,.5);background:linear-gradient(rgba(226,255,240,.96),rgba(150,228,190,.88));border-color:rgba(255,255,255,.9);
  box-shadow:0 0 32px rgba(130,235,180,.55),0 4px 0 rgba(50,130,90,.45),0 10px 24px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.95)}
.sbtn.primary small{color:#14432f}
.sbtn:hover{transform:translateY(-2px)}
.sbtn:focus-visible{outline:3px solid #9ff0ff;outline-offset:2px}
.sops{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.sops section{padding:8px 10px;border-radius:12px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18)}
.sops h3{margin:0 0 4px;font-size:13px;color:#bfefff;letter-spacing:.06em}
.orow{display:flex;align-items:center;gap:8px;margin:3px 0;font-size:13.5px}
.orow kbd{display:inline-block;min-width:6.4em;text-align:center;padding:2px 8px;border-radius:6px;font:inherit;font-size:12px;font-weight:700;color:#063042;text-shadow:none;
  background:linear-gradient(rgba(255,255,255,.94),rgba(225,240,250,.8));border:1px solid rgba(255,255,255,.9);box-shadow:0 3px 8px rgba(0,0,0,.3)}
.snote{margin:4px 0 0;font-size:11px;line-height:1.5;color:#d4f0ff;opacity:.92}
.sfoot{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:2px 14px;margin:10px 0 0;padding-top:8px;border-top:1px solid rgba(255,255,255,.18)}
.sfoot p{margin:0;font-size:12.5px;line-height:1.45;color:#eaf8ff;text-wrap:pretty}
.sorg{white-space:nowrap}
.sofficial .narrow{display:none}
@media (max-width:720px){.sofficial .wide{display:none}.sofficial .narrow{display:inline}}
.sfoot b{color:#fff}
.sorg a{color:#9fe3ff;font-weight:700;text-decoration:underline;text-underline-offset:3px;padding:3px 0}
.sorg a:hover{color:#d6f4ff}
.sorg a:focus-visible{outline:2px solid #9fe3ff;outline-offset:2px;border-radius:3px}
body.starting #title,body.starting #ctrl,body.starting #floors,body.starting #views,body.starting #foot,body.starting #labels{display:none}
body.touring #floors{display:none}
@media (pointer:coarse){.sops .op-mouse{display:none}.sops{grid-template-columns:1fr}}
@media (max-width:560px){.schoice{grid-template-columns:1fr}.sops{grid-template-columns:1fr}.scard{padding:12px 14px 12px}.sbtn b{font-size:18px}}
@media (max-width:720px){
  /* スマホ: 題は一行だけにして、詳しいことは「詳しく」で開く (画面を 3D に使うため) */
  #title{padding:6px 8px 6px 10px;right:max(12px,env(safe-area-inset-right,0px));max-width:none}
  #title h1{font-size:18px}
  #titleMore{display:inline-block}
  #title[data-open="false"] #titleBody{display:none}
  #title[data-open="true"]{z-index:6}
  #title .about{display:block}
  #title .lead{font-size:12.5px}
  #title dl{font-size:11.5px;gap:1px 10px}
  #ctrl{top:calc(56px + env(safe-area-inset-top,0px));left:max(12px,env(safe-area-inset-left,0px));right:auto;flex-direction:row;flex-wrap:wrap;max-width:calc(100vw - 150px);padding:4px}
  #floors{top:calc(56px + env(safe-area-inset-top,0px));width:auto;max-width:min(270px,calc(100vw - 24px));max-height:calc(100% - 230px);z-index:2}
  #settings{top:auto;bottom:calc(56px + env(safe-area-inset-bottom,0px));left:max(12px,env(safe-area-inset-left,0px));right:max(12px,env(safe-area-inset-right,0px));width:auto}
  #floors h2 small{display:none}
  #foot{bottom:calc(54px + env(safe-area-inset-bottom,0px));right:max(12px,env(safe-area-inset-right,0px))}
  #compass{width:38px;height:38px;flex:none}
  #credit{min-width:0;font-size:10px;padding:3px 8px}
  #credit .full{display:none}
  #credit .short{display:block}
  #credit .short .l{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.45}
  #credit .short a{padding:3px 0}
  #info{bottom:calc(100px + env(safe-area-inset-bottom,0px))}
  .seg button,.chip{padding:4px 8px}
  #tour{bottom:calc(54px + env(safe-area-inset-bottom,0px));padding:6px 10px}
  #tourTitle{font-size:16px}
  #tourText{font-size:13px;margin:3px 0 5px}
  body.touring #foot{display:none}
}
@media (prefers-reduced-motion:reduce){#hint,#sky,#loading{transition:none}}

#compass text{font-family:var(--f-mono)}
#credit{position:static}
#loading{position:fixed;border-radius:0}
#loading.err{color:var(--fg);padding:0 24px;text-align:center;line-height:1.6}
.unofficial{display:inline-block;font-family:var(--f-body);font-size:11px;font-weight:700;letter-spacing:.04em;vertical-align:4px;margin-left:6px;padding:1px 6px;border-radius:4px;background:var(--chip);color:var(--muted)}