/* 蔵王 樹氷の夜 (zao.computing.jp)。2026-10-31 茜 */
/* 夜の雪山。画面いっぱいの立体の上に、ガラス板の案内を少しだけ重ねる (一つの夜の世界なので暗い色だけで作る) */
:root{
  --night:#060a18; --panel:rgba(14,22,44,.62); --line:rgba(190,210,255,.22);
  --snow:#eef3ff; --muted:#a9b6d6; --accent:#9fd2ff; --pink1:rgba(255,170,198,.92); --pink2:rgba(246,120,160,.9);
  --f-display:"Kaisei Decol","Hiragino Mincho ProN","Yu Mincho",serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",system-ui,sans-serif;
  --gl:max(16px,env(safe-area-inset-left,0px)); --gr:max(16px,env(safe-area-inset-right,0px));
  --gt:calc(10px + env(safe-area-inset-top,0px)); --gb:calc(12px + env(safe-area-inset-bottom,0px));
  color-scheme:dark;
}
html,body{height:100%;margin:0;overflow:hidden;background:var(--night);color:var(--snow);font-family:var(--f-body)}
canvas#c{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none;cursor:grab}
canvas#c.drag{cursor:grabbing}
.chip{background:var(--panel);border:1px solid var(--line);border-radius:8px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
button{font-family:var(--f-body);color:var(--snow);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:5px 10px;font-size:12.5px;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
button:hover{border-color:rgba(190,210,255,.5)}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 12px rgba(159,210,255,.35)}
#hud{position:fixed;left:0;top:0;padding-top:var(--gt);padding-left:var(--gl);pointer-events:none;max-width:calc(100vw - 230px)}
#hud h1{font-family:var(--f-display);font-weight:700;font-size:clamp(19px,3vw,26px);letter-spacing:.06em;line-height:1.15;margin:0;text-wrap:balance;text-shadow:0 0 16px rgba(160,200,255,.45),0 1px 2px rgba(0,0,0,.6)}
#hud .sub{font-size:11.5px;color:var(--muted);margin-top:2px;letter-spacing:.05em;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.badge{display:inline-block;font-family:var(--f-body);font-size:11px;font-weight:700;letter-spacing:.04em;vertical-align:5px;margin-left:8px;padding:1px 7px;border-radius:4px;background:linear-gradient(var(--pink1),var(--pink2));color:#fff;border:1px solid rgba(255,214,226,.9);text-shadow:0 1px 1px rgba(150,30,70,.45);box-shadow:0 0 12px rgba(255,140,180,.35)}
.tools{position:fixed;top:var(--gt);right:var(--gr);display:flex;gap:5px;align-items:center}
#alt{padding:4px 8px;font-size:12px;font-variant-numeric:tabular-nums;white-space:nowrap}
#alt b{color:var(--accent)}
#credit{position:fixed;left:var(--gl);bottom:var(--gb);font-size:10px;color:var(--muted);line-height:1.45;max-width:min(46vw,340px);text-shadow:0 1px 2px rgba(0,0,0,.7)}
body.touch #credit{display:none}
#reticle{position:fixed;left:50%;top:50%;width:4px;height:4px;margin:-2px 0 0 -2px;border-radius:50%;background:rgba(238,243,255,.5);pointer-events:none}
/* はじめの案内 (ガラス板) */
#start{position:fixed;inset:0;display:grid;place-items:center;padding:16px var(--gr) 16px var(--gl);background:radial-gradient(ellipse at 50% 40%,rgba(6,10,24,.15),rgba(6,10,24,.55));transition:opacity .45s}
#start.out{opacity:0;pointer-events:none}
.scard{width:min(560px,100%);max-height:calc(100% - 8px);overflow:auto;padding:16px 20px;border-radius:14px;background:linear-gradient(160deg,rgba(40,56,100,.42),rgba(12,18,40,.62));border:1px solid rgba(200,220,255,.3);-webkit-backdrop-filter:blur(14px) saturate(1.2);backdrop-filter:blur(14px) saturate(1.2);box-shadow:0 20px 60px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.18)}
.shead{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.stag{font-size:10.5px;letter-spacing:.2em;color:var(--muted)}
.scard .badge{margin-left:0;vertical-align:0}
.scard h2{font-family:var(--f-display);font-size:clamp(28px,6vw,40px);line-height:1.1;margin:6px 0 4px;letter-spacing:.06em;text-wrap:balance;text-shadow:0 0 22px rgba(160,200,255,.5)}
.scard h2 small{display:block;font-size:.42em;letter-spacing:.2em;color:var(--accent);margin-bottom:4px}
.slead{font-size:15px;line-height:1.55;margin:0 0 8px}
.sfacts{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:12px;color:var(--muted);margin:0 0 10px;padding:0}
.schoice{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:10px}
.sbtn{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:9px 12px;text-align:left;border-radius:10px}
.sbtn b{font-size:17px;font-family:var(--f-display);letter-spacing:.05em}
.sbtn small{font-size:11.5px;color:var(--muted)}
.sbtn.primary{background:linear-gradient(160deg,rgba(120,170,255,.35),rgba(60,90,170,.4));border-color:rgba(170,205,255,.6)}
.sops{display:grid;grid-template-columns:1fr 1fr;gap:6px 14px;font-size:12px}
.sops h3{font-size:12px;margin:0 0 3px;color:var(--accent);letter-spacing:.06em}
.orow{display:flex;gap:6px;align-items:baseline;line-height:1.5}
.orow kbd{font-family:var(--f-body);font-size:11px;padding:0 5px;border:1px solid var(--line);border-radius:4px;white-space:nowrap;background:rgba(255,255,255,.06)}
.snote{font-size:11px;color:var(--muted);margin:8px 0 0;line-height:1.5}
@media (pointer:coarse){.sops .op-mouse{display:none}.sops{grid-template-columns:1fr}}
@media (max-width:560px){.schoice{grid-template-columns:1fr}.scard{padding:12px 14px}#hud .sub{display:none}#hud h1{font-size:17px}}
@media (max-width:440px){#hud{max-width:calc(100vw - 190px)}#alt{position:absolute;right:0;top:calc(100% + 5px)}}
/* スマホのスティック */
#joy{display:none;position:fixed;left:calc(var(--gl) + 8px);bottom:calc(var(--gb) + 8px);width:104px;height:104px;border-radius:50%;border:1px solid var(--line);background:rgba(14,22,44,.3);touch-action:none}
#joy.on{background:rgba(14,22,44,.45)}
#knob{position:absolute;left:50%;top:50%;width:44px;height:44px;margin:-22px 0 0 -22px;border-radius:50%;background:rgba(238,243,255,.28);border:1px solid rgba(238,243,255,.5)}
body.touch #joy{display:block}
#err{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);padding:14px 16px;width:min(420px,calc(100vw - 32px))}
#err p{margin:0 0 8px;line-height:1.5}
@media (prefers-reduced-motion:reduce){#start{transition:none}}
/* シリーズ共通の見た目 (AquaMomoStyle に揃えたもの) */
/* シリーズ共通の見た目 (AquaMomoStyle に揃えたもの) */
/* 蔵王 樹氷の夜 — シリーズ共通の UI (AquaMomoStyle の site.css と同じ組み立て・寸法・ぼかし・枠・影・区切り幅)
   色だけを冬の夜へ: 水色のガラス → 群青・藍のガラス、水族館のシアン → 淡い氷の青。桃色の札はシリーズと同じ。 */
:root{
  --deep:#060a18; --ink:#eef3ff; --muted:#a9b6d6; --panel:rgba(10,16,38,.74);
  --line:rgba(180,200,245,.26); --focus:#b9dcff; --danger:#ffb4a8;
  --momo:#ffb3c7;
  /* 最初の版の名前でも引けるように (zao.html の残りの規則 #credit・#joy などが使っている) */
  --night:var(--deep); --snow:var(--ink); --accent:var(--focus);
  --f-display:'Kaisei Decol','Hiragino Mincho ProN','Yu Mincho',serif;
  --f-body:'Zen Kaku Gothic New','Hiragino Sans','Yu Gothic',system-ui,sans-serif;
  --gl:max(16px,env(safe-area-inset-left,0px)); --gr:max(16px,env(safe-area-inset-right,0px));
  --gt:calc(10px + env(safe-area-inset-top,0px)); --gb:calc(12px + env(safe-area-inset-bottom,0px));
  color-scheme:dark;
}
/* 文字の基準 (ガラス板の中の文字やボタンはこの 13px/1.4 を受け継いで寸法が決まる) */
body{font:13px/1.4 var(--f-body);color:var(--ink)}
[hidden]{display:none!important}

/* 道具の札とボタン */
.chip{background:var(--panel);border:1px solid var(--line);border-radius:8px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
button{touch-action:manipulation}
button{font:inherit;font-size:12.5px;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:7px;padding:4px 10px;cursor:pointer;line-height:1.3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
button:hover{border-color:var(--focus)}
button:focus-visible{outline:2px solid var(--focus);outline-offset:1px}
button[aria-expanded="true"],button[aria-pressed="true"]{background:rgba(185,220,255,.2);border-color:var(--focus)}
body.touch .tools button{padding:7px 12px;font-size:13px}
body.touch #alt{padding:7px 9px}

/* 左上の題 (ほかのサイトと同じく、題の横に「非公式」の札) */
#hud{position:fixed;left:0;top:0;padding-top:var(--gt);padding-left:var(--gl);padding-right:var(--gr);pointer-events:none;max-width:calc(100vw - 250px)}
#hud h1{font-family:var(--f-display);font-weight:700;font-size:clamp(19px,3vw,26px);letter-spacing:.05em;line-height:1.15;margin:0;text-wrap:balance;text-shadow:0 0 16px rgba(160,195,255,.4),0 1px 2px rgba(0,0,0,.6)}
#hud .sub{font-size:11.5px;color:var(--muted);margin-top:2px;letter-spacing:.05em;text-shadow:0 1px 2px rgba(0,0,0,.6)}
.unofficial{display:inline-block;font-family:var(--f-body);font-size:11px;font-weight:700;letter-spacing:.04em;vertical-align:5px;margin-left:8px;padding:1px 7px;border-radius:4px;background:linear-gradient(rgba(255,170,198,.92),rgba(246,120,160,.9));color:#fff;border:1px solid rgba(255,214,226,.9);text-shadow:0 1px 1px rgba(150,30,70,.45);box-shadow:0 0 12px rgba(255,140,180,.35)}

.tools{position:fixed;top:var(--gt);right:var(--gr);display:flex;gap:5px;align-items:center}
#alt{padding:4px 8px;font-size:12px;font-variant-numeric:tabular-nums;white-space:nowrap}
#alt b{font-weight:700;color:var(--focus)}

/* はじめの案内: 樹氷原の上に置いた藍色のガラス板 (定禅寺・多賀城・新本庁舎・AquaMomo の案内と同じ組み立て) */
#start{position:fixed;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;padding-block:16px;padding-left:var(--gl);padding-right:var(--gr);background:radial-gradient(ellipse at center,rgba(0,0,0,.08),rgba(4,6,20,.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:#f2f5ff;border-radius:20px;padding:16px 22px 14px;
  background:linear-gradient(135deg,rgba(30,40,88,.6),rgba(10,14,36,.5) 45%,rgba(40,52,108,.5));border:1px solid rgba(205,222,255,.42);
  -webkit-backdrop-filter:blur(22px) saturate(150%);backdrop-filter:blur(22px) saturate(150%);
  box-shadow:0 30px 80px rgba(0,0,0,.55),inset 0 1px 0 rgba(230,238,255,.55),inset 0 0 40px rgba(130,160,240,.12);text-shadow:0 1px 2px rgba(0,0,0,.6)}
.scard::before{content:"";position:absolute;inset:-40% -10% auto -10%;height:60%;pointer-events:none;background:linear-gradient(170deg,rgba(230,238,255,.16),rgba(230,238,255,0) 60%);transform:rotate(-4deg)}
.shead{display:flex;align-items:center;gap:10px}
.stag{font-size:11px;letter-spacing:.3em;color:#b4d6ff;font-weight:700;min-width:0}
.sbadge{font-size:11px;font-weight:700;white-space:nowrap;flex:none;padding:1px 8px;border-radius:4px;background:linear-gradient(rgba(255,170,198,.95),rgba(246,120,160,.92));border:1px solid rgba(255,214,226,.9);color:#fff;letter-spacing:.06em;text-shadow:0 1px 1px rgba(150,30,70,.45);box-shadow:0 0 14px rgba(255,140,180,.4)}
#startTitle{font-family:var(--f-display);font-weight:700;font-size:clamp(30px,6vw,46px);line-height:1.12;margin:4px 0 2px;letter-spacing:.06em;text-wrap:balance;text-shadow:0 1px 2px rgba(0,0,0,.6),0 0 24px rgba(150,190,255,.45)}
#startTitle small{display:block;font-family:var(--f-body);font-size:clamp(13px,1.8vw,15px);font-weight:500;letter-spacing:.12em;color:#c6d4f2;margin-bottom:2px}
.slead{margin:0;font-size:clamp(14px,2.2vw,17px);color:#e8eeff}
.sfacts{display:flex;flex-wrap:wrap;gap:4px 14px;margin:8px 0 12px;font-size:13px;color:#c6d4f2;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:#f2f5ff;display:flex;flex-direction:column;gap:3px;
  background:rgba(225,235,255,.1);border:1px solid rgba(200,218,255,.36);box-shadow:inset 0 1px 0 rgba(230,238,255,.35);text-shadow:inherit;transition:transform .15s,box-shadow .15s}
.sbtn b{font-family:var(--f-display);font-weight:700;font-size:20px;letter-spacing:.06em}
.sbtn small{font-size:12.5px;color:#d2dcf5}
.sbtn.primary{color:#0b1838;text-shadow:0 1px 0 rgba(255,255,255,.45);background:linear-gradient(rgba(236,243,255,.97),rgba(160,196,250,.9));border-color:rgba(244,248,255,.9);
  box-shadow:0 0 32px rgba(160,195,255,.45),0 4px 0 rgba(36,56,120,.45),0 10px 24px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.95)}
.sbtn.primary small{color:#1c2c58}
.sbtn:hover{transform:translateY(-2px)}
.sbtn:focus-visible{outline:3px solid var(--focus);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(225,235,255,.07);border:1px solid rgba(200,218,255,.18)}
.sops h3{margin:0 0 4px;font-size:13px;font-weight:500;color:#bfdcff;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:500;color:#0b1838;text-shadow:none;
  background:linear-gradient(rgba(246,249,255,.95),rgba(206,220,248,.82));border:1px solid rgba(244,248,255,.9);box-shadow:0 3px 8px rgba(0,0,0,.3)}
.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(200,218,255,.2)}
.sfoot p{margin:0;font-size:12.5px;line-height:1.45;color:#e8eeff;text-wrap:pretty}
.sfoot b{color:#fff;font-weight:500}
.sorg{white-space:nowrap}
.sorg a{color:#cfe2ff;text-decoration:underline;text-underline-offset:3px;padding:3px 0}
.sorg a:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:3px}
.snote{margin:4px 0 0;font-size:11px;line-height:1.5;color:#c6d4f2;opacity:.92}
@media (pointer:coarse){.sops .op-mouse{display:none}.sops{grid-template-columns:1fr}}
@media (max-width:560px){.schoice{grid-template-columns:1fr}.scard{padding:12px 14px}.sbtn b{font-size:18px}.stag{font-size:10px;letter-spacing:.14em}
  #hud .sub{display:none}#hud h1{font-size:17px}#alt{font-size:11px}}
/* 幅の狭いスマホ (〜440px): 題名と右上のボタンが重なるので、標高は二つのボタンの下へ回す */
@media (max-width:440px){#hud{max-width:calc(100vw - 190px)}#alt{position:absolute;right:0;top:calc(100% + 5px)}}
@media (prefers-reduced-motion:reduce){.sbtn,#start{transition:none}}


/* 見方の切り替え (歩く / ゴンドラ / 空から)。右下にまとめ、スマホのスティック (左下) とぶつからないようにする */
#views{position:fixed;right:var(--gr);bottom:var(--gb);display:flex;gap:4px;z-index:5}
#views button{padding:6px 10px;font-size:12.5px}
body.touch #views button{padding:8px 11px;font-size:13px}
#zoom{position:fixed;right:var(--gr);bottom:calc(var(--gb) + 42px);display:flex;flex-direction:column;gap:4px;z-index:5}
#zoom button{width:40px;height:36px;padding:0;font-size:18px;line-height:1}
#modeHint{position:fixed;left:50%;transform:translateX(-50%);top:calc(var(--gt) + 52px);padding:5px 12px;font-size:12.5px;max-width:calc(100vw - 32px);text-align:center;pointer-events:none}
@media (max-width:440px){#modeHint{top:calc(var(--gt) + 84px)}}

/* 古いブラウザ (Internet Explorer など) への案内 (2026-11-05)。
   @supports を知らないブラウザでだけ表に出る。新しいブラウザでは下の @supports で消える */
.oldbrowser{position:fixed;top:0;right:0;bottom:0;left:0;z-index:2147483647;overflow:auto;box-sizing:border-box;padding:56px 20px;background:#ffffff;color:#111111;font-family:"Yu Gothic","Meiryo",sans-serif;font-size:18px;line-height:1.8;text-align:center}
.oldbrowser .ob-box{max-width:640px;margin:0 auto}
.oldbrowser p{margin:0 0 12px}
.oldbrowser .ob-t{font-size:26px;font-weight:bold;margin:0 0 20px}
.oldbrowser .ob-u{display:inline-block;margin-top:8px;padding:8px 14px;border:1px solid #9aa3b5;background:#f1f3f7;font-family:Consolas,"MS Gothic",monospace;font-size:20px}
@supports (display:grid){.oldbrowser{display:none !important}}