:root{
  --bg:#f6f5f1;--card:#ffffff;--ink:#1c1c1e;--sub:#5f5e5a;--muted:#9a988f;--line:rgba(0,0,0,.09);--line2:rgba(0,0,0,.16);
  --me:#185FA5;--me-bg:#e6f1fb;--op:#993C1D;--op-bg:#faece7;--accent:#1c1c1e;--on-accent:#fff;--danger:#A32D2D;
  --r:14px;--sh:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#18181a;--card:#222225;--ink:#f1f0ec;--sub:#b4b2a9;--muted:#7d7b74;--line:rgba(255,255,255,.09);--line2:rgba(255,255,255,.18);
  --me:#85B7EB;--me-bg:#0c2c4a;--op:#F0997B;--op-bg:#4a1b0c;--accent:#f1f0ec;--on-accent:#18181a;--danger:#F09595;
}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Yu Gothic UI",sans-serif;min-height:100vh;display:flex;flex-direction:column}
button,input{font:inherit;color:inherit}
a{color:inherit}
.hd{display:flex;align-items:center;justify-content:space-between;padding:14px max(16px,env(safe-area-inset-left));max-width:880px;width:100%;margin:0 auto}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:19px;text-decoration:none;letter-spacing:.02em}
/* ロゴ：走る人と、その後ろの色のドット。「画像の色がランナーになる」を表す。小さくても形が読めるよう、人は1色 */
.mark{width:39px;height:30px;display:block;color:var(--ink)}
.logo{font-size:20px;letter-spacing:.06em}
.hd-link{font-size:14px;color:var(--sub);text-decoration:none;padding:6px 10px;border-radius:999px}
.hd-link:hover{background:var(--line)}
.wrap{max-width:880px;width:100%;margin:0 auto;padding:0 16px 32px;flex:1}

.hero{text-align:center;margin:6px 0 18px;word-break:auto-phrase;text-wrap:balance}
.hero h1{font-size:clamp(24px,5.4vw,34px);line-height:1.3;margin:0;font-weight:800;letter-spacing:.02em}
.hero p{margin:6px 0 0;color:var(--sub);font-size:15px}
.hero .safe{display:inline-flex;align-items:center;gap:5px;margin-top:10px;font-size:12px;color:var(--sub);background:var(--card);border:1px solid var(--line);border-radius:999px;padding:3px 10px 3px 8px}
.safe svg{width:13px;height:13px}
.setup{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:stretch}
.team-card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);padding:14px;border-top:3px solid var(--me);display:flex;flex-direction:column;align-items:center;gap:10px;min-width:0}
.tc-label{font-size:13px;font-weight:700;letter-spacing:.04em;padding:2px 10px;border-radius:999px}
.op.team-card{border-top-color:var(--op)}
.me .tc-label{color:var(--me);background:var(--me-bg)}.op .tc-label{color:var(--op);background:var(--op-bg)}
.drop{position:relative;width:100%;max-width:220px;aspect-ratio:1;border-radius:12px;border:1.5px dashed var(--line2);background:repeating-conic-gradient(var(--line) 0 25%,transparent 0 50%) 0 0/24px 24px;display:flex;align-items:center;justify-content:center;cursor:pointer;overflow:hidden;transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--me);background:var(--me-bg)}
.op .drop:hover,.op .drop.over{border-color:var(--op);background:var(--op-bg)}
.drop.filled{border:0;background:none}
.drop.filled:hover .mosaic{filter:brightness(1.06)}
.drop.static{cursor:default}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer;z-index:2}
.drop-empty{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--sub);pointer-events:none;background:var(--card);padding:10px 14px;border-radius:10px}
.drop-empty svg{width:36px;height:36px;color:var(--muted)}
.mosaic{width:100%;height:100%;image-rendering:pixelated;display:block;border-radius:12px}
/* 元の画像の小さな見本。ドットになっても「自分が選んだ画像」だと分かるように */
.thumb{position:absolute;right:8px;bottom:8px;width:24%;aspect-ratio:1;object-fit:cover;border-radius:50%;border:2px solid #fff;box-shadow:0 1px 6px rgba(0,0,0,.3);pointer-events:none}
.tc-note{margin:0;font-size:12px;color:var(--muted);text-align:center}
.vs{align-self:center;font-weight:800;color:var(--muted);font-size:15px}
.rivals{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}
.rivals button{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--line2);background:transparent;border-radius:999px;padding:4px 10px 4px 5px;font-size:12px;cursor:pointer}
.rivals .sw{width:14px;height:14px;border-radius:4px;display:block;border:1px solid var(--line)}
.rivals .dice .sw{background:conic-gradient(#E24B4A 0 25%,#E8C22A 0 50%,#2BB3C9 0 75%,#7F77DD 0)}
.rivals button[aria-checked="true"]{background:var(--op-bg);border-color:var(--op);color:var(--op);font-weight:700}

.start{display:block;width:100%;max-width:420px;margin:16px auto 0;border:0;border-radius:999px;padding:15px 20px;font-size:17px;font-weight:700;background:var(--accent);color:var(--on-accent);cursor:pointer;transition:transform .1s,opacity .15s}
.start:active{transform:scale(.98)}.start:disabled{opacity:.35;cursor:default}
.err{color:var(--danger);font-size:14px;text-align:center;min-height:0;margin:8px 0 0}
.err:empty{display:none}
.start-hint{text-align:center;font-size:13px;color:var(--muted);margin:8px 0 0}

.stage{margin-top:18px}
.cv-wrap{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
#cv{display:block;width:100%;touch-action:manipulation}
.stage-bar{display:flex;gap:8px;margin-top:10px;justify-content:space-between;align-items:center;flex-wrap:wrap}
.after{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end;margin-left:auto}
@media (max-width:560px){.after{width:100%;margin-left:0}.after button{flex:1}.after .primary{flex-basis:100%;order:-1}}
button.ghost{border:1px solid var(--line2);background:var(--card);border-radius:999px;padding:8px 14px;font-size:14px;cursor:pointer}
button.primary{border:0;background:var(--accent);color:var(--on-accent);border-radius:999px;padding:12px 22px;font-size:16px;font-weight:700;cursor:pointer}
.hint{background:var(--card);border-radius:var(--r);padding:12px 14px;margin-top:10px;box-shadow:var(--sh)}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{width:30px;height:30px;border-radius:50%;border:1px solid var(--line2);cursor:pointer;padding:0}
.chip[aria-pressed="true"]{outline:2px solid var(--ink);outline-offset:2px}
.tip{margin:8px 0 0;font-size:14px;color:var(--sub);min-height:22px}

.copied{font-size:13px;color:var(--sub);margin:8px 0 0;text-align:right}

/* 広告枠：あらかじめ高さを確保して、広告が出ても画面がずれないようにする。ボタンからは十分に離す */
.ad{display:none;margin:20px auto;width:100%;text-align:center;overflow:hidden}
body.ads-on .ad,body.ads-preview .ad{display:block}
.ad::before{content:"広告";display:block;font-size:11px;color:var(--muted);margin-bottom:4px}
.ad-top{min-height:118px;margin-top:4px}
.ad-race{min-height:274px;margin-top:36px}
body.ads-preview .ad::after{content:attr(data-slot) " の広告枠";display:flex;align-items:center;justify-content:center;height:calc(100% - 20px);min-height:inherit;border:1.5px dashed var(--line2);border-radius:10px;color:var(--muted);font-size:13px}
@media (min-width:768px){.ad-top{min-height:110px}}

.ft{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;padding:20px 16px calc(24px + env(safe-area-inset-bottom));font-size:13px;color:var(--muted)}
.ft a{color:var(--muted)}

@media (max-width:560px){
  .setup{grid-template-columns:1fr 1fr;gap:10px}
  .vs{display:none}
  .team-card{padding:12px 10px}
  .drop{max-width:none}
  .rivals button{font-size:11px;padding:3px 8px 3px 4px}
  .hd{padding:12px 16px}
}

/* 遊び方・ポリシーのページ */
.doc{max-width:720px;margin:0 auto;padding:0 16px 40px}
.doc h1{font-size:24px;margin:8px 0 16px}.doc h2{font-size:18px;margin:28px 0 8px}
.doc p,.doc li{color:var(--sub)}
.doc table{border-collapse:collapse;width:100%;font-size:14px}.doc td,.doc th{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
.sw{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:6px;border:1px solid var(--line2)}

/* ステージングの印（本番には出ない） */
.env-badge{position:fixed;left:8px;bottom:8px;z-index:50;background:#E8C22A;color:#1c1c1e;font-size:12px;font-weight:800;padding:3px 10px;border-radius:999px;box-shadow:0 2px 8px rgba(0,0,0,.2);pointer-events:none}