:root{
  --bg:#0E1420; --panel:#18202F; --panel2:#1E2838;
  --gold:#FFC53D; --zone:#45D6B8; --danger:#FF5C4D;
  --ink:#E8EEF7; --dim:#8CA3C3; --line:#2A3850;
  --mono:"SF Mono","Menlo","Consolas",monospace;
  --jp:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;
  --safe-t:env(safe-area-inset-top,0px);
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{margin:0; padding:0; box-sizing:border-box;}
html,body{height:100%;}
body{
  background:var(--bg); color:var(--ink); font-family:var(--jp);
  overflow:hidden; position:fixed; width:100%;
  -webkit-user-select:none; user-select:none;
  -webkit-touch-callout:none;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation; overscroll-behavior:none;
}
#stage{position:fixed; inset:0; display:flex; align-items:center; justify-content:center;}
canvas{display:block; width:100%; height:100%;}

.overlay{
  position:fixed; inset:0; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:16px;
  padding:calc(20px + var(--safe-t)) 24px calc(20px + var(--safe-b));
  background:radial-gradient(ellipse at 50% 30%, rgba(24,32,47,.92), rgba(14,20,32,.97));
  z-index:10; text-align:center; overflow-y:auto;
}
.hidden{display:none !important;}

.logo{
  font-weight:900; font-size:clamp(52px,14vw,96px); line-height:1;
  letter-spacing:-0.02em; text-wrap:balance;
}
.logo .tsu{color:var(--gold);}
.tagline{color:var(--dim); font-size:13px; letter-spacing:.08em;}

.stats{
  display:flex; gap:0; background:var(--panel); border:1px solid var(--line);
  border-radius:14px; overflow:hidden; margin-top:4px;
}
.stat{padding:12px 16px; min-width:84px;}
.stat + .stat{border-left:1px solid var(--line);}
.stat .v{font-family:var(--mono); font-variant-numeric:tabular-nums; font-size:21px; font-weight:700;}
.stat .k{font-size:10px; color:var(--dim); letter-spacing:.12em; margin-top:2px;}
.stat .v.gold{color:var(--gold);}
.stat .v.zone{color:var(--zone);}

button{
  font-family:var(--jp); font-weight:800; border:none; cursor:pointer;
  border-radius:16px; transition:transform .08s ease, filter .15s ease;
  min-height:44px;
}
button:active{transform:scale(.96);}
button:focus-visible{outline:3px solid var(--gold); outline-offset:3px;}
.btn-primary{
  background:var(--gold); color:#211500; font-size:19px;
  padding:16px 40px; min-width:min(320px,82vw);
  box-shadow:0 6px 24px rgba(255,197,61,.25);
}
.btn-primary:hover{filter:brightness(1.08);}
.btn-primary:disabled{cursor:default;}
.btn-secondary{
  background:var(--panel2); color:var(--ink); font-size:16px;
  padding:13px 32px; min-width:min(320px,82vw); border:1px solid var(--line);
}
.btn-secondary:hover{filter:brightness(1.15);}
/* 対戦チャレンジ — 挑発的な赤みで通常モードと差別化 */
.btn-challenge{
  background:linear-gradient(135deg,#2b1622,#3a1d1d);
  color:var(--ink); font-size:16px;
  padding:13px 32px; min-width:min(320px,82vw);
  border:1px solid #6d3b52;
}
.btn-challenge:hover{filter:brightness(1.25);}
.btn-challenge .btn-sub{color:#e79ab3;}
.btn-x{
  background:#000; color:#fff; font-size:16px;
  padding:13px 32px; min-width:min(320px,82vw); border:1px solid #2b2b2b;
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
}
.btn-x:hover{filter:brightness(1.6);}
.btn-x svg{width:18px; height:18px; flex:none;}
.btn-ghost{background:transparent; color:var(--dim); font-size:13px; padding:10px 16px; font-weight:600;}
.btn-ghost:hover{color:var(--ink);}
.btn-sub{font-size:11px; font-weight:600; color:rgba(33,21,0,.65); display:block; margin-top:2px;}
.btn-secondary .btn-sub{color:var(--dim);}

.howto{color:var(--dim); font-size:12px; max-width:34ch; line-height:1.7;}

/* HUD */
#hud{
  position:fixed; top:0; left:0; right:0; z-index:5;
  display:flex; align-items:flex-start; justify-content:space-between;
  padding:calc(14px + var(--safe-t)) 20px 0; pointer-events:none;
}
#hudScore{font-family:var(--mono); font-variant-numeric:tabular-nums; font-size:32px; font-weight:700; line-height:1;}
#hudScoreLabel{font-size:10px; color:var(--dim); letter-spacing:.18em; margin-bottom:4px;}
#hudRight{display:flex; flex-direction:column; align-items:flex-end; gap:8px;}
.chip{
  background:var(--panel); border:1px solid var(--line); color:var(--dim);
  font-size:11px; padding:5px 12px; border-radius:99px; letter-spacing:.06em;
}
#feverChip{
  background:linear-gradient(90deg,#FF5C4D,#FFC53D); color:#211500;
  border:none; font-weight:800; animation:pulse .5s ease infinite alternate;
}
@keyframes pulse{from{transform:scale(1);}to{transform:scale(1.08);}}
#hint{
  position:fixed; bottom:calc(7vh + var(--safe-b)); left:0; right:0; text-align:center;
  color:var(--dim); font-size:14px; letter-spacing:.1em; z-index:5;
  pointer-events:none; transition:opacity .6s ease;
}
#btnMute{
  position:fixed; left:calc(14px + env(safe-area-inset-left,0px));
  bottom:calc(14px + var(--safe-b)); z-index:20;
  width:44px; height:44px; min-height:44px; border-radius:50%;
  background:var(--panel); border:1px solid var(--line); color:var(--ink);
  font-size:18px; line-height:1; opacity:.7; padding:0;
  display:flex; align-items:center; justify-content:center;
}
#btnMute:hover{opacity:1;}

/* Result */
.verdict{font-size:14px; letter-spacing:.3em; color:var(--dim);}
.bigscore{
  font-family:var(--mono); font-variant-numeric:tabular-nums;
  font-size:clamp(60px,17vw,110px); font-weight:700; line-height:1;
}
.newbest{
  background:var(--gold); color:#211500; font-weight:900; font-size:13px;
  padding:6px 16px; border-radius:99px; letter-spacing:.1em;
}
.ch-verdict{font-weight:900; font-size:19px; letter-spacing:.03em; text-wrap:balance;}
.ch-verdict.win{color:var(--zone);}
.ch-verdict.lose{color:var(--danger);}
.nearmiss{color:var(--danger); font-size:16px; font-weight:700;}
.nearmiss small{display:block; color:var(--dim); font-weight:400; font-size:12px; margin-top:4px;}
.gradestrip{font-size:15px; letter-spacing:2px; word-break:break-all; max-width:82vw;}
.resultstats{display:flex; gap:22px; color:var(--dim); font-size:13px;}
.resultstats b{font-family:var(--mono); color:var(--ink); font-size:18px; font-variant-numeric:tabular-nums;}
#shareDone{
  color:var(--zone); font-size:13px; min-height:18px;
  -webkit-user-select:text; user-select:text;
  white-space:pre-line; max-width:82vw; word-break:break-all;
}

.title-rank{color:var(--gold); font-weight:800;}
#dailyState{font-size:12px; color:var(--dim);}
.kbd-hint{display:none;}
@media (hover:hover) and (pointer:fine){ .kbd-hint{display:inline;} }

/* 挑戦受諾画面 */
.ch-fire{font-size:clamp(56px,16vw,96px); line-height:1;}
.ch-target{color:var(--gold); font-weight:900;}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important; transition:none !important;}
}