:root{
  --bg:#08090a;
  --fg:#f2f3f5;
  --dim:#4a4d55;
  --mute:#8a8f98;
  --line:#1c1e22;
  --key:#0d0e10;
  --accent:#fff;
  --err:#ff5c5c;
  --ok:#f2f3f5;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --sans:Inter,system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0}
html,body{height:100%}
body{
  background:
    radial-gradient(1200px 520px at 50% -10%,#1b1d22 0%,transparent 70%),
    var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
.brand{position:fixed;top:16px;left:18px;display:flex;gap:10px;align-items:center;font-size:8px;letter-spacing:.14em;color:var(--mute);line-height:1.4}
.logo{width:16px;height:16px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#6b6f78 70%)}

#stage{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:28px;padding:40px 20px 70px}
#title{font-weight:500;font-size:clamp(26px,3.6vw,40px);letter-spacing:-.02em}

#play,#result{width:min(820px,100%);text-align:center;min-height:132px}
#text{
  font-family:var(--mono);font-size:clamp(18px,2.1vw,24px);line-height:1.8;
  color:var(--dim);outline:none;text-align:left;
  white-space:pre-wrap;word-break:break-word;
  max-height:5.4em;overflow:hidden;
}
#text span{position:relative;transition:color .08s}
#text span.ok{color:var(--ok)}
#text span.bad{color:var(--err);background:rgba(255,92,92,.12);border-radius:3px}
#text span.cur::before{
  content:"";position:absolute;left:-1px;top:.15em;bottom:.15em;width:2px;background:var(--accent);
  animation:blink 1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}
#hint,.again{margin-top:18px;font-size:12px;color:var(--mute)}
kbd{
  font-family:var(--sans);font-size:11px;color:var(--mute);
  border:1px solid var(--line);border-radius:5px;padding:1px 6px;background:#0e0f11;
}

#result{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:56px}
#result[hidden]{display:none}
.stat{display:flex;flex-direction:column;gap:6px}
.stat span{font-size:44px;font-weight:500;letter-spacing:-.03em}
.stat label{font-size:12px;color:var(--mute);letter-spacing:.08em}
.again{width:100%}

/* keyboard */
#keyboard{display:flex;flex-direction:column;gap:6px;transition:opacity .25s,transform .25s;user-select:none}
#keyboard.off{opacity:0;transform:translateY(12px);pointer-events:none}
.row{display:flex;gap:6px;justify-content:center}
.k{
  --w:1;
  width:calc(var(--w)*clamp(30px,3.9vw,50px) + (var(--w) - 1)*6px);
  height:clamp(30px,3.9vw,50px);
  border:1px solid var(--line);border-radius:8px;background:var(--key);
  color:#2e3138;font-size:clamp(10px,1.1vw,13px);
  display:flex;align-items:center;justify-content:center;
  transition:color .12s,border-color .12s,background .12s,box-shadow .12s;
}
.k.sm{font-size:9px}
.k.next{color:var(--fg);border-color:#3a3d44;background:#15171a;box-shadow:0 0 18px rgba(255,255,255,.07)}
.k.press{color:#000;background:#fff;border-color:#fff;box-shadow:0 0 22px rgba(255,255,255,.35)}
.k.wrong{color:#fff;background:#4a1515;border-color:var(--err)}

/* bottom bar */
.bar{
  position:fixed;bottom:0;left:0;right:0;height:46px;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:11px;color:var(--mute);
}
.modes{display:flex;gap:4px;overflow-x:auto}
.tab{
  background:none;border:0;color:var(--mute);font:inherit;cursor:pointer;
  padding:6px 10px;border-radius:7px;display:flex;gap:8px;align-items:center;white-space:nowrap;
  transition:color .15s,background .15s;
}
.tab:hover{color:var(--fg)}
.tab.active{color:var(--fg);background:#14161a}
.tab.active kbd{color:var(--fg)}

@media(max-width:700px){
  #keyboard{display:none}
  .brand-text{display:none}
  #toggle{display:none}
  .bar{justify-content:center;padding:0 8px}
  .tab kbd{display:none}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}