:root{
  --bg0:#06070b;
  --bg1:#0b1020;
  --txt:#e9ecff;
  --mut:#a8b0d6;
  --line:rgba(255,255,255,.10);
  --neon:rgba(120,160,255,.9);
  --neon2:rgba(255,120,200,.65);
  --good:rgba(120,255,190,.85);
  --bad:rgba(255,120,120,.85);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", sans-serif;
  color:var(--txt);
  background:
    radial-gradient(1200px 600px at 70% 20%, rgba(120,160,255,.18), transparent 60%),
    radial-gradient(900px 500px at 20% 80%, rgba(255,120,200,.12), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

.app{
  max-width: 980px;
  margin: 0 auto;
  padding: 16px;
}

.top{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  padding: 10px 6px 16px 6px;
  border-bottom:1px solid var(--line);
}

.brand{
  display:flex;
  gap:12px;
  align-items:center;
}
.logo-dot{
  width:14px;height:14px;border-radius:50%;
  background: radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,.2) 35%, rgba(120,160,255,.9));
  box-shadow: 0 0 20px rgba(120,160,255,.6);
}
.title{font-weight:700; letter-spacing:.2px}
.sub{color:var(--mut); font-size:12px; margin-top:2px}

.track{
  text-align:right;
}
.track-name{font-weight:700}
.track-meta{color:var(--mut); font-size:12px; margin-top:2px}

.stage{padding:18px 6px 10px}

.hud{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:10px;
}
.hud-item{
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:14px;
  background: rgba(255,255,255,.03);
}
.hud-item span{font-weight:700; margin-left:6px}

.lane-wrap{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  padding: 12px;
  border:1px solid var(--line);
  border-radius:20px;
  background: rgba(0,0,0,.18);
  min-height: 520px;
  overflow:hidden;
}

.lane{
  position:relative;
  border:1px solid var(--line);
  border-radius:18px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  overflow:hidden;
  touch-action:manipulation;
}
.lane-label{
  position:absolute;
  top:12px; left:14px;
  font-size:12px;
  color:var(--mut);
  letter-spacing:.4px;
}

.judge-line{
  position:absolute;
  left:0; right:0;
  bottom:90px;
  height:2px;
  background: linear-gradient(90deg, transparent, rgba(120,160,255,.8), transparent);
  box-shadow: 0 0 18px rgba(120,160,255,.35);
}

.note{
  position:absolute;
  left:50%;
  width: 70%;
  height: 14px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(255,255,255,.25), rgba(120,160,255,.9), rgba(255,120,200,.55));
  box-shadow: 0 0 16px rgba(120,160,255,.25);
  opacity:.95;
}

.judge-text{
  position:absolute;
  left:50%;
  bottom: 26px;
  transform:translateX(-50%);
  font-weight:800;
  letter-spacing:.6px;
  padding: 10px 14px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.35);
  backdrop-filter: blur(8px);
}

.controls{
  display:flex;
  gap:10px;
  margin-top:12px;
  flex-wrap:wrap;
}
.btn{
  padding: 10px 14px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--txt);
  font-weight:700;
}
.btn.primary{
  border-color: rgba(120,160,255,.45);
  box-shadow: 0 0 24px rgba(120,160,255,.18);
}

.hint{margin-top:10px; color:var(--mut)}
.small{font-size:12px; color:var(--mut)}
.foot{margin-top:14px; padding-top:10px; border-top:1px solid var(--line)}
code{color:#dbe0ff}

.btn.danger{
  border-color: rgba(255,120,120,.45);
  box-shadow: 0 0 24px rgba(255,120,120,.12);
}