:root{
  --bg:#05060f;
  --cyan:#19e6ff;
  --magenta:#ff2bd6;
  --violet:#8b5cff;
  --gold:#ffd166;
  --lime:#9dff57;
  --red:#ff4d6d;
  --text:#eef2ff;
  --muted:#8e97b8;
  --glass:rgba(10,12,30,.72);
  --font-d:'Orbitron','Noto Sans KR',sans-serif;
  --font-b:'Noto Sans KR','Orbitron',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font-b);overflow:hidden;user-select:none;-webkit-user-select:none;touch-action:manipulation}
#game{position:fixed;inset:0;width:100%;height:100%;display:block}
.hidden{display:none!important}

/* ---------- Screens ---------- */
.screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:10;animation:fadeIn .35s ease}
@keyframes fadeIn{from{opacity:0;transform:scale(.98)}to{opacity:1;transform:none}}
.panel{
  width:min(92vw,720px);max-height:92vh;overflow:auto;
  background:var(--glass);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.08);border-radius:22px;padding:28px 30px;
  box-shadow:0 30px 80px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.08);
  display:flex;flex-direction:column;gap:18px;align-items:center;text-align:center
}
.panel.small{width:min(90vw,380px)}
.panel h2{font-family:var(--font-d);font-weight:900;letter-spacing:.18em;font-size:1.3rem;background:linear-gradient(90deg,var(--cyan),var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent}
.panel-head{width:100%;display:flex;align-items:center;justify-content:space-between}
.stars-total{font-family:var(--font-d);color:var(--gold);font-weight:700}

/* ---------- Buttons ---------- */
.btn{
  font-family:var(--font-d);font-weight:700;letter-spacing:.12em;cursor:pointer;border:0;color:var(--text);
  padding:14px 34px;border-radius:999px;font-size:1rem;transition:transform .12s,box-shadow .2s,filter .2s;position:relative
}
.btn:active{transform:scale(.96)}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),var(--violet) 55%,var(--magenta));
  box-shadow:0 10px 30px rgba(139,92,255,.45),0 0 0 1px rgba(255,255,255,.12) inset;color:#fff
}
.btn-primary:hover{filter:brightness(1.12);box-shadow:0 14px 40px rgba(139,92,255,.65)}
.btn-primary.next{background:linear-gradient(135deg,var(--lime),var(--cyan))}
.btn-ghost{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn.small{padding:8px 16px;font-size:.75rem}
a.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;box-sizing:border-box}
.btn.home{color:var(--cyan);border-color:rgba(25,230,255,.35)}
.btn.home:hover{background:rgba(25,230,255,.12)}
.pulse{animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 10px 30px rgba(139,92,255,.45)}50%{box-shadow:0 10px 50px rgba(25,230,255,.75),0 0 30px rgba(255,43,214,.4)}}

/* ---------- Title ---------- */
#screen-title{background:radial-gradient(ellipse at 50% 30%,rgba(139,92,255,.18),transparent 60%)}
.title-wrap{display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center;padding:20px}
.logo{font-family:var(--font-d);font-weight:900;font-size:clamp(3rem,12vw,7.5rem);line-height:.9;letter-spacing:.06em;display:flex;flex-direction:column;align-items:center}
.logo-orbit{background:linear-gradient(180deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 24px rgba(25,230,255,.6))}
.logo-rush{background:linear-gradient(180deg,#fff,var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 24px rgba(255,43,214,.6));animation:glitch 6s infinite}
@keyframes glitch{0%,94%,100%{transform:none}95%{transform:translate(-3px,1px) skewX(-6deg)}97%{transform:translate(3px,-1px) skewX(6deg)}}
.tagline{color:var(--muted);letter-spacing:.3em;font-size:.95rem}
.title-sub{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.title-foot{color:var(--muted);font-size:.78rem;letter-spacing:.1em;margin-top:10px}

/* ---------- Level grid ---------- */
.level-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;width:100%}
.level-card{
  position:relative;border-radius:16px;padding:16px 14px;text-align:left;cursor:pointer;border:1px solid rgba(255,255,255,.08);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));transition:transform .15s,box-shadow .2s;overflow:hidden
}
.level-card::before{content:"";position:absolute;inset:0;background:var(--lc);opacity:.18;transition:opacity .2s}
.level-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(0,0,0,.5)}
.level-card:hover::before{opacity:.35}
.level-card.locked{opacity:.4;cursor:not-allowed;filter:grayscale(.6)}
.level-card .n{font-family:var(--font-d);font-size:1.6rem;font-weight:900;position:relative}
.level-card .t{font-weight:700;font-size:.95rem;position:relative;margin-top:2px}
.level-card .bpm{color:var(--muted);font-size:.75rem;letter-spacing:.1em;position:relative;margin-top:6px}
.level-card .stars{position:relative;margin-top:6px;color:var(--gold);font-size:.9rem;letter-spacing:.1em}
.level-card .best{position:relative;color:var(--muted);font-size:.7rem;margin-top:2px}
.mode-row{display:flex;gap:12px;width:100%}
.btn-mode{flex:1;border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:4px;align-items:flex-start;text-align:left;letter-spacing:.05em}
.btn-mode b{font-size:1.1rem;letter-spacing:.15em}
.btn-mode span{font-family:var(--font-b);font-weight:400;font-size:.8rem;color:var(--muted)}
.btn-mode.endless{background:linear-gradient(135deg,rgba(255,77,109,.35),rgba(255,43,214,.25));border:1px solid rgba(255,77,109,.4)}
.btn-mode.daily{background:linear-gradient(135deg,rgba(255,209,102,.3),rgba(157,255,87,.2));border:1px solid rgba(255,209,102,.4)}

/* ---------- HUD ---------- */
#hud{pointer-events:none;z-index:5;align-items:stretch;justify-content:flex-start;flex-direction:column}
.hud-top{display:flex;justify-content:space-between;padding:18px 24px 30px;font-family:var(--font-d);background:linear-gradient(180deg,rgba(5,6,15,.85),rgba(5,6,15,0))}
.hud-label{font-size:.65rem;letter-spacing:.3em;color:var(--muted)}
.hud-score{font-size:2rem;font-weight:900;text-shadow:0 0 18px rgba(25,230,255,.6)}
.hud-center{flex:1;max-width:360px;margin:0 20px;text-align:center}
.hud-level{font-size:.8rem;letter-spacing:.3em;color:var(--muted);margin-bottom:8px}
.hud-progress{height:6px;background:rgba(255,255,255,.08);border-radius:3px;overflow:hidden}
#hud-progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--magenta));box-shadow:0 0 12px var(--cyan);transition:width .2s linear}
.hud-right{text-align:right}
.hud-lives{font-size:1.3rem;letter-spacing:.1em;color:var(--red);filter:drop-shadow(0 0 8px rgba(255,77,109,.7))}
.hud-acc{font-size:1rem;color:var(--muted);margin-top:4px}
.hud-combo{
  position:absolute;left:50%;top:22%;transform:translate(-50%,-50%);text-align:center;font-family:var(--font-d);
  opacity:0;transition:opacity .2s
}
.hud-combo.show{opacity:1}
.hud-combo span{display:block;font-size:4rem;font-weight:900;line-height:1;background:linear-gradient(180deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 16px rgba(25,230,255,.6))}
.hud-combo.fever span{background:linear-gradient(180deg,#fff,var(--gold),var(--magenta));-webkit-background-clip:text;background-clip:text}
.hud-combo small{letter-spacing:.4em;color:var(--muted);font-size:.7rem}
.hud-combo.pop span{animation:pop .18s ease-out}
@keyframes pop{0%{transform:scale(1.35)}100%{transform:scale(1)}}
.hud-fever{position:absolute;left:50%;top:32%;transform:translateX(-50%);font-family:var(--font-d);font-weight:900;letter-spacing:.4em;font-size:1.1rem;color:var(--gold);text-shadow:0 0 20px var(--gold);animation:feverBlink .5s steps(2) infinite}
@keyframes feverBlink{50%{opacity:.4}}
.hud-countdown{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--font-d);font-size:7rem;font-weight:900;color:#fff;text-shadow:0 0 40px var(--cyan)}
.hud-hint{position:absolute;bottom:40px;left:0;right:0;text-align:center;color:var(--muted);letter-spacing:.15em;font-size:.85rem;animation:hintFade 4s forwards}
@keyframes hintFade{0%,70%{opacity:1}100%{opacity:0}}

/* ---------- Result ---------- */
.result-title{font-family:var(--font-d);font-size:2rem;font-weight:900;letter-spacing:.3em}
.result-title.fail{color:var(--red);text-shadow:0 0 20px var(--red)}
.result-rank{font-family:var(--font-d);font-size:7rem;font-weight:900;line-height:1;animation:rankIn .6s cubic-bezier(.2,1.6,.4,1)}
@keyframes rankIn{from{transform:scale(3);opacity:0}to{transform:none;opacity:1}}
.rank-S{background:linear-gradient(180deg,#fff,var(--gold),#ff8c42);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 30px var(--gold))}
.rank-A{color:var(--cyan);text-shadow:0 0 30px var(--cyan)}
.rank-B{color:var(--lime);text-shadow:0 0 30px var(--lime)}
.rank-C{color:var(--violet);text-shadow:0 0 30px var(--violet)}
.rank-F{color:var(--red);text-shadow:0 0 30px var(--red)}
.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;width:100%}
.result-grid div{background:rgba(255,255,255,.05);border-radius:12px;padding:12px 6px}
.result-grid label{display:block;font-size:.6rem;letter-spacing:.3em;color:var(--muted);font-family:var(--font-d)}
.result-grid b{font-family:var(--font-d);font-size:1.3rem}
.judge-row{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;font-family:var(--font-d);font-size:.8rem;letter-spacing:.1em}
.judge-row b{margin-left:4px}
.j-perfect{color:var(--gold)}.j-great{color:var(--cyan)}.j-good{color:var(--lime)}.j-miss{color:var(--red)}
.fever-txt{color:var(--gold)}
.newbest{font-family:var(--font-d);color:var(--gold);letter-spacing:.3em;font-weight:900;animation:feverBlink .6s steps(2) infinite}
.result-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}

/* ---------- How to / Settings ---------- */
.howto{text-align:left;line-height:1.7;padding-left:22px;display:flex;flex-direction:column;gap:6px;max-width:560px}
.setting{width:100%;max-width:460px;text-align:left;display:flex;flex-direction:column;gap:6px}
.setting label{font-weight:700;font-size:.9rem}
.setting small{color:var(--muted);font-size:.75rem}
.setting.row{flex-direction:row;gap:24px;justify-content:center}
.setting input[type=range]{width:100%;accent-color:var(--cyan)}
.calib-msg{color:var(--cyan);font-family:var(--font-d);font-size:.85rem;min-height:1.2em}

/* ---------- FX ---------- */
#flash{position:fixed;inset:0;pointer-events:none;z-index:4;background:#fff;opacity:0}
#toast{position:fixed;top:16px;left:50%;transform:translateX(-50%);z-index:30;background:var(--glass);border:1px solid rgba(255,255,255,.15);padding:10px 20px;border-radius:999px;font-family:var(--font-d);font-size:.8rem;letter-spacing:.15em}
body.shake #game{animation:shake .25s}
@keyframes shake{0%,100%{transform:none}25%{transform:translate(-8px,4px)}50%{transform:translate(7px,-5px)}75%{transform:translate(-4px,3px)}}


/* ---------- v3: wide panel, preview, my music, speed, mods ---------- */
.panel.wide{width:min(94vw,900px)}
.level-card{position:relative}
.level-card .t small{color:var(--muted);font-weight:400}
.level-card .prev{position:absolute;right:10px;top:10px;width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.2);background:rgba(0,0,0,.35);color:#fff;font-size:.9rem;cursor:pointer;transition:transform .15s,background .2s}
.level-card .prev:hover{background:var(--cyan);color:#000;transform:scale(1.1)}
.mymusic{width:100%;display:flex;flex-direction:column;gap:10px;align-items:stretch}
.btn-file{width:100%;border-radius:16px;padding:16px;background:linear-gradient(135deg,rgba(25,230,255,.25),rgba(139,92,255,.3));border:1px dashed rgba(25,230,255,.5);display:flex;flex-direction:column;gap:4px;align-items:center}
.btn-file small{font-family:var(--font-b);font-weight:400;color:var(--muted);letter-spacing:.05em;font-size:.75rem}
.file-info{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column;gap:8px;text-align:left}
.file-name{font-weight:700;font-size:.9rem;word-break:break-all}
.file-fields{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.file-fields label{font-size:.8rem;color:var(--muted);display:flex;gap:6px;align-items:center}
.file-fields input{width:84px;padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,.15);background:rgba(0,0,0,.4);color:#fff;font-family:var(--font-d);font-size:.9rem}
.file-conf{font-size:.75rem;color:var(--cyan)}
.options-row{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.opt-speed,.opt-mods{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:12px 14px;display:flex;flex-direction:column;gap:8px;text-align:left}
.opt-speed label{font-family:var(--font-d);font-size:.75rem;letter-spacing:.2em;color:var(--muted)}
.opt-speed label b{color:var(--gold);font-size:1rem;margin-left:6px}
.opt-speed input[type=range]{width:100%;accent-color:var(--gold)}
.speed-presets{display:flex;gap:6px}
.speed-presets button{flex:1;padding:8px 0;border-radius:8px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);color:var(--text);font-family:var(--font-d);font-size:.8rem;cursor:pointer}
.speed-presets button.on{background:var(--gold);color:#000;font-weight:900}
.opt-mods{gap:6px}
.mod{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);color:var(--text);font-family:var(--font-d);font-weight:700;letter-spacing:.15em;font-size:.8rem;cursor:pointer;text-align:left;position:relative}
.mod small{font-family:var(--font-b);font-weight:400;letter-spacing:0;color:var(--muted);font-size:.72rem}
.mod::after{content:"OFF";position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:.65rem;color:var(--muted)}
.mod.on{background:linear-gradient(135deg,rgba(25,230,255,.3),rgba(255,43,214,.25));border-color:var(--cyan)}
.mod.on::after{content:"ON";color:var(--cyan)}
.timing-row{font-size:.82rem;color:var(--muted)}
.timing-row b{color:var(--cyan);font-family:var(--font-d)}
.n-grav{color:#aa6eff;font-weight:700}.n-split{color:#fff;font-weight:700}.n-hole{color:#ff9a3c;font-weight:700}

/* ---------- Mobile: bigger everything ---------- */
@media (max-width:640px){
  .hud-top{padding:12px 14px 26px}
  .hud-label{font-size:.6rem}
  .hud-score{font-size:1.7rem}
  .hud-level{font-size:.62rem;letter-spacing:.15em}
  .hud-lives{font-size:1.7rem}
  .hud-acc{font-size:.95rem}
  .hud-combo span{font-size:3.6rem}
  .hud-hint{font-size:.95rem;bottom:28px;padding:0 16px}
  .hud-countdown{font-size:5.5rem}
  .result-rank{font-size:5rem}
  .result-grid{grid-template-columns:repeat(2,1fr)}
  .panel{padding:18px 14px;gap:14px;border-radius:18px}
  .panel.wide{width:96vw}
  .btn{padding:16px 28px;font-size:1.05rem;min-height:52px}
  .btn.small{padding:12px 16px;font-size:.85rem;min-height:44px}
  .level-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .level-card{padding:14px 12px}
  .level-card .n{font-size:1.5rem}
  .level-card .prev{width:44px;height:44px;font-size:1.1rem}
  .mode-row{flex-direction:column}
  .options-row{grid-template-columns:1fr}
  .speed-presets button{padding:12px 0;font-size:.95rem}
  .mod{padding:14px 12px;font-size:.9rem}
  .file-fields input{width:96px;font-size:1rem;padding:10px}
  .logo{font-size:clamp(3.2rem,16vw,6rem)}
  .howto{font-size:.95rem}
}

/* ---------- v3.1: version / install / share ---------- */
.version-tag{display:flex;gap:12px;align-items:center;justify-content:center;margin-top:4px}
.version-tag span{font-family:var(--font-d);font-size:.7rem;letter-spacing:.25em;color:var(--muted);opacity:.8}
.version-info{font-size:.75rem;color:var(--muted);letter-spacing:.05em}
.version-info b{color:var(--cyan);font-family:var(--font-d)}

/* ---------- v3.2: hit error bar, histogram, challenge, gamepad ---------- */
.hud-err{position:absolute;left:50%;bottom:86px;transform:translateX(-50%);width:min(360px,80vw);opacity:.9}
.hud-err canvas{width:100%;height:28px;display:block;border-radius:6px}
.hud-err-labels{display:flex;justify-content:space-between;font-family:var(--font-d);font-size:.6rem;letter-spacing:.2em;color:var(--muted);margin-top:3px}
.r-hist{width:min(480px,86vw);height:90px;border-radius:10px;background:rgba(255,255,255,.04)}
.challenge-banner{background:linear-gradient(135deg,rgba(255,209,102,.25),rgba(255,43,214,.2));border:1px solid rgba(255,209,102,.5);border-radius:14px;padding:12px 18px;font-size:.9rem;max-width:min(92vw,520px)}
.challenge-banner b{color:var(--gold);font-family:var(--font-d)}
.gp-status{color:var(--cyan);font-weight:400}
body.reduced .pulse{animation:none}
body.reduced .logo-rush{animation:none}
body.reduced.shake #game{animation:none}
@media (max-width:640px){ .hud-err{bottom:70px} .hud-hint{bottom:18px} }