:root{
  --ink:#0b3a5c;
  --glass:rgba(255,255,255,.28);
  --glass-edge:rgba(255,255,255,.75);
  --aqua:#27b7f0;
  --lime:#8fdc2c;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:#9ad8ff;font-family:"Open Sans","Noto Sans JP",system-ui,sans-serif;color:var(--ink);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}
#c{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}

/* ---------- Aero glass ---------- */
.panel,.pill,.glass-btn{
  position:relative;
  background:linear-gradient(180deg,rgba(255,255,255,.55) 0%,rgba(255,255,255,.18) 48%,rgba(190,235,255,.12) 52%,rgba(255,255,255,.30) 100%);
  border:1px solid var(--glass-edge);
  box-shadow:0 10px 40px rgba(0,60,120,.25),inset 0 1px 0 rgba(255,255,255,.95),inset 0 -12px 24px rgba(120,210,255,.25);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);backdrop-filter:blur(14px) saturate(1.4);
}

#start{position:fixed;inset:0;display:grid;place-items:center;padding:16px;z-index:10;
  background:radial-gradient(120% 80% at 50% 30%,rgba(255,255,255,.25),rgba(0,90,160,.18));transition:opacity .6s}
#start.out{opacity:0;pointer-events:none}
.panel{width:min(420px,100%);border-radius:28px;padding:40px 36px 30px;text-align:center;overflow:hidden}
.panel-sheen{position:absolute;left:-20%;right:-20%;top:-60%;height:105%;border-radius:0 0 50% 50%;
  background:linear-gradient(180deg,rgba(255,255,255,.65),rgba(255,255,255,.05));pointer-events:none}
.panel h1{position:relative;font-weight:600;font-size:40px;letter-spacing:-.01em;
  background:linear-gradient(180deg,#0d7fd0,#0a4f8a);-webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 1px 0 rgba(255,255,255,.6)}
.keys{position:relative;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;margin:24px 0 28px;font-size:13px;text-align:left}
.keys li{display:flex;align-items:center;gap:8px;white-space:nowrap}
kbd{font:600 11px "Open Sans",sans-serif;padding:4px 8px;border-radius:8px;color:#0a4f8a;
  background:linear-gradient(180deg,#fff,#dff3ff);border:1px solid #a9dcf7;box-shadow:0 2px 0 #9dd2f0}
.aero-btn{position:relative;border:0;cursor:pointer;font:700 17px "Noto Sans JP",sans-serif;color:#fff;letter-spacing:.08em;
  padding:16px 56px;border-radius:999px;overflow:hidden;
  background:linear-gradient(180deg,#7fe05a 0%,#3dbb24 50%,#22a313 51%,#5fd63a 100%);
  box-shadow:0 6px 18px rgba(30,140,20,.45),inset 0 -3px 8px rgba(255,255,160,.5),inset 0 0 0 1px rgba(255,255,255,.55);
  text-shadow:0 1px 2px rgba(0,80,0,.45);transition:transform .15s,filter .15s}
.aero-btn::before{content:"";position:absolute;left:6%;right:6%;top:3px;height:48%;border-radius:999px 999px 40% 40%;
  background:linear-gradient(180deg,rgba(255,255,255,.9),rgba(255,255,255,.15))}
.aero-btn span{position:relative}
.aero-btn:hover{filter:brightness(1.08) saturate(1.1)}
.aero-btn:active{transform:scale(.97)}
.aero-btn[disabled]{filter:grayscale(.6) opacity(.7);cursor:default}
.loading{position:relative;margin-top:14px;font-size:12px;opacity:.7;min-height:1.2em}

/* ---------- HUD ---------- */
#hud{position:fixed;inset:0;pointer-events:none;z-index:5}
#hud[hidden]{display:none}
.pill{position:absolute;left:max(16px,env(safe-area-inset-left));top:max(16px,env(safe-area-inset-top));
  display:flex;align-items:center;gap:8px;padding:8px 18px 8px 10px;border-radius:999px;font-weight:700;font-size:18px}
.pill .of{font-weight:400;font-size:13px;opacity:.7}
.orb-icon{width:26px;height:26px;border-radius:50%;
  background:radial-gradient(circle at 35% 28%,#fff 0 10%,rgba(255,255,255,0) 32%),radial-gradient(circle at 50% 70%,#9ff 0,#1aa7e8 55%,#0b5fa8 100%);
  box-shadow:0 2px 6px rgba(0,80,160,.4),inset 0 -3px 6px rgba(160,255,255,.6)}
.pill.bump{animation:bump .5s}
@keyframes bump{30%{transform:scale(1.15)}}
.glass-btn{position:absolute;right:max(16px,env(safe-area-inset-right));top:max(16px,env(safe-area-inset-top));
  pointer-events:auto;border-radius:999px;padding:8px 16px;font:600 13px "Noto Sans JP",sans-serif;color:var(--ink);cursor:pointer}

/* ---------- touch ---------- */
#touch{position:fixed;inset:0;pointer-events:none;z-index:6}
#touch[hidden]{display:none}
#stick{position:absolute;left:28px;bottom:calc(28px + env(safe-area-inset-bottom));width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.15),rgba(255,255,255,.35));border:1px solid rgba(255,255,255,.7);opacity:.85}
#knob{position:absolute;left:50%;top:50%;width:54px;height:54px;margin:-27px 0 0 -27px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,#fff,#bfeaff 45%,#58c0f0);box-shadow:0 4px 12px rgba(0,80,160,.35)}
#jumpBtn{position:absolute;right:28px;bottom:calc(36px + env(safe-area-inset-bottom));width:88px;height:88px;border-radius:50%;border:0;pointer-events:auto;
  background:radial-gradient(circle at 50% 28%,rgba(255,255,255,.95) 0 18%,rgba(255,255,255,0) 45%),radial-gradient(circle,#8ef05e,#2fae1c);
  box-shadow:0 6px 18px rgba(30,140,20,.4),inset 0 0 0 2px rgba(255,255,255,.6)}
#jumpBtn:active{transform:scale(.94)}