:root{color-scheme:dark;--bg:#09131b;--panel:#10202c;--panel2:#142b39;--text:#f5f8fb;--muted:#9fb0be;--mint:#72f0bd;--amber:#ffc574;--blue:#819cff;--line:#294250;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;background:radial-gradient(circle at 50% -10%,#193f4d 0,transparent 45%),var(--bg)}
button,select,input{font:inherit}
button,select{border:1px solid var(--line);border-radius:12px;background:#172c39;color:var(--text);min-height:44px;padding:9px 14px}
button{cursor:pointer;font-weight:700;touch-action:manipulation}
button:hover:not(:disabled){background:#214152}
button:disabled{opacity:.42;cursor:default}
button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
[hidden]{display:none!important}
main{max-width:1180px;margin:auto;padding:24px 24px max(28px,env(safe-area-inset-bottom))}
header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}
.welcome-replay{min-height:36px;padding:6px 11px;background:transparent;font-size:.75rem;color:var(--muted)}
.welcome{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:18px;background:#061017e8;backdrop-filter:blur(12px)}
.welcome-card{width:min(580px,100%);max-height:calc(100dvh - 36px);overflow:auto;border:1px solid #446776;border-radius:28px;background:radial-gradient(circle at 50% 0,#1c4653 0,transparent 44%),linear-gradient(155deg,#142d3a,#091720 72%);box-shadow:0 24px 80px #0009;padding:20px clamp(20px,5vw,42px) 34px;text-align:center}
.welcome-top{display:grid;grid-template-columns:38px 1fr 70px;align-items:center;color:var(--muted);font-size:.65rem;font-weight:800;letter-spacing:.14em}
.welcome-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--mint);color:#073528;font-size:1.3rem}
.welcome-skip{border:0;background:transparent;padding:4px;min-height:36px;color:var(--muted)}
.welcome-panel{padding-top:clamp(22px,5vh,48px)}
.welcome-panel h2{font-size:clamp(1.8rem,7vw,3rem);line-height:1.04;letter-spacing:-.055em;margin:10px auto 16px;max-width:12ch}
.welcome-panel>p:not(.eyebrow):not(.welcome-status){max-width:43ch;margin:0 auto 24px;color:#bfd0da;line-height:1.6;font-size:1rem}
.welcome-panel>.primary{width:min(320px,100%);margin-top:22px}
.welcome-panel small{display:block;margin-top:12px;color:var(--muted);font-size:.72rem}
.welcome-visual{height:88px;display:flex;align-items:center;justify-content:center;gap:16px;color:var(--mint)}
.welcome-visual i{height:2px;width:75px;background:linear-gradient(90deg,transparent,var(--mint))}.welcome-visual i:last-child{transform:scaleX(-1)}.welcome-visual b{font-size:3.2rem;text-shadow:0 0 28px #72f0bd88}
.welcome-pulse{display:grid;place-items:center;width:120px;height:120px;margin:28px auto;border-radius:50%;background:#72f0bd15;border:2px solid #72f0bd55;color:var(--mint);font-size:4rem;animation:welcome-breathe 1.8s ease-in-out infinite alternate}
.welcome-status{min-height:48px;color:var(--mint);font-weight:750;line-height:1.45}
.welcome-note-control{display:flex;align-items:center;justify-content:center;gap:22px;margin:26px auto}.welcome-note-control strong{font-size:3.6rem;min-width:120px}.welcome-note-control button{font-size:1.6rem;width:52px}
.welcome-meter{position:relative;height:72px;margin:36px auto 16px;border-radius:18px;background:#09151d;border:1px solid var(--line);display:flex;align-items:flex-end;justify-content:space-between;padding:12px;color:var(--muted);font-size:.6rem;letter-spacing:.12em}
.welcome-meter i{position:absolute;left:50%;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--mint);box-shadow:0 0 18px #72f0bd88}.welcome-meter b{position:absolute;top:17px;width:34px;height:34px;border-radius:50%;background:#fff;transform:translateX(-50%);box-shadow:0 0 18px #fff8;transition:left .1s}
.welcome-actions{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}.welcome-actions .primary{margin:0}.welcome-celebrate{font-size:3.5rem;color:var(--mint);text-shadow:0 0 32px #72f0bd;animation:perfect-note .8s ease-in-out infinite alternate}
@keyframes welcome-breathe{to{transform:scale(1.08);box-shadow:0 0 36px #72f0bd33}}
.brand{display:flex;gap:11px;align-items:center}
h1{font-size:1.3rem;letter-spacing:-.03em;margin:0}
.sub-brand{font-size:.62rem;letter-spacing:.19em;color:var(--muted)}
.privacy{font-size:.78rem;color:var(--muted)}
.setup{display:flex;gap:18px;align-items:stretch;margin-bottom:18px}
.mode-switch{display:flex;align-items:center;gap:5px;padding:5px;background:#0d1b25;border:1px solid var(--line);border-radius:15px;min-width:max-content}
.mode-switch button{border:0;background:transparent}
.mode-switch button[aria-pressed=true]{background:#284454}
.mode-switch span{font-size:.56rem;color:var(--mint);margin-left:6px}
.quick-choice{display:flex;flex:1;gap:18px;align-items:center;padding:10px 16px;border:1px solid var(--line);border-radius:16px;background:#0e1d27}
.eyebrow{font-size:.68rem;font-weight:750;letter-spacing:.13em;color:var(--muted)}
.target-card{display:flex;align-items:center;gap:12px}
.target-card>select{width:76px}
.note-controls{display:flex;align-items:center;gap:9px;text-align:center}
.target-note{font-size:1.55rem;line-height:1;font-weight:750;letter-spacing:-.04em}
.step{font-size:1.25rem;width:38px;padding:2px}
.helper{color:var(--muted);font-size:.7rem;line-height:1.4;margin:5px 0 0}
.exercise-choice{min-width:210px}
.exercise-choice select{width:100%;margin-top:5px}
.headphone-quick{margin-left:auto;max-width:250px}
.headphone-option{display:flex;gap:9px;align-items:center;font-weight:700}
.headphone-option input{width:20px;height:20px;accent-color:var(--mint)}

.stage{position:relative;overflow:hidden;padding:24px clamp(16px,3vw,38px) 28px;border:1px solid #315361;border-radius:24px;background:linear-gradient(150deg,#142c39,#0b1822 65%);text-align:center;transition:border-color .25s,box-shadow .25s}
.stage-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.tempo-label{font-size:.7rem;color:var(--muted)}
.note-orbit{position:relative;width:135px;height:110px;margin:10px auto 0;display:grid;place-items:center}
.singing-note{font-size:82px;line-height:1;color:var(--muted);position:relative;z-index:1;transition:color .2s,transform .2s}
.halo{position:absolute;width:96px;height:96px;border-radius:50%;border:2px solid transparent}
.spark{position:absolute;color:var(--mint);opacity:0;font-size:22px}
.s1{left:0;top:12px}
.s2{right:0;bottom:8px}
.s3{right:6px;top:0}
.s4{left:8px;bottom:0}
.perfect-badge{font-size:.72rem;font-weight:850;letter-spacing:.2em;color:var(--mint);height:18px;opacity:0}
.heard-note{font-size:4.1rem;font-weight:600;letter-spacing:-.07em;line-height:1.1;font-variant-numeric:tabular-nums}
.meter{height:50px;position:relative;margin:14px auto 0;max-width:720px}
.track{position:absolute;left:0;right:0;top:22px;height:7px;background:#294555;border-radius:10px}
.good-zone{position:absolute;left:50%;transform:translateX(-50%);width:20%;height:26px;top:-9px;border-radius:8px;background:#72f0bd24;border:1px solid #72f0bd55}
.needle{position:absolute;top:5px;height:40px;width:5px;background:var(--mint);border-radius:5px;transform:translateX(-50%);transition:left .09s}
.meter-labels{display:flex;justify-content:space-between;margin:auto;max-width:720px;color:var(--muted);font-size:.6rem;letter-spacing:.13em}
.instruction{font-size:1.45rem;font-weight:760;margin:19px 0 5px;letter-spacing:-.025em}
.detail{font-size:.86rem;color:var(--muted);margin:0;min-height:21px;font-variant-numeric:tabular-nums}
.hint{font-size:.78rem;color:var(--muted);line-height:1.45;margin:8px auto 14px;max-width:48ch}
.beats{display:flex;justify-content:center;gap:8px;margin:14px auto 0}
.beats span{display:grid;place-items:center;border:1px solid var(--line);width:27px;height:27px;border-radius:50%;font-size:.72rem;color:var(--muted)}
.beats .active{background:var(--mint);color:#082f25;border-color:var(--mint)}
.transport{display:flex;justify-content:center;gap:9px;flex-wrap:wrap}
.primary{background:var(--mint);border-color:var(--mint);color:#073528;padding:12px 24px}
.primary:hover:not(:disabled){background:#b0ffdd}
.quiet{background:transparent}
.tone{border:2px solid var(--line)}
.tone[aria-pressed=true]{border-color:var(--mint);color:var(--mint)}
#headphone-controls{margin-top:8px;color:var(--muted);font-size:.7rem}

.game-heading{display:flex;justify-content:space-between;gap:12px;text-align:left;align-items:center;margin:14px 0 10px}
.game-heading h2{font-size:1.5rem;letter-spacing:-.04em;margin:0}
.game-heading p{color:var(--muted);font-size:.75rem;margin:4px 0}
.score{text-align:right}
.score strong{font-size:1.7rem;display:block}
.score span{font-size:.55rem;letter-spacing:.15em;color:var(--muted)}
.sequence{display:flex;gap:6px;margin-bottom:10px}
.sequence span{flex:1;border:1px solid var(--line);border-radius:8px;padding:6px 4px;font-size:.76rem;color:var(--muted)}
.sequence span.current{color:var(--mint);border-color:var(--mint);background:#72f0bd18}
.sequence span.completed{background:#254334;color:var(--mint)}
.pitch-lane{height:clamp(300px,42vh,460px);position:relative;overflow:hidden;border-radius:17px;border:1px solid #36596c;background:linear-gradient(#102c38,#0d1926)}
.lane-row{position:absolute;width:100%;height:1px;background:#45607455;text-align:left}
.lane-row span{position:absolute;left:10px;top:-8px;color:#8da5b5;font-size:.62rem;background:#102531;padding-right:5px}
.sing-line{position:absolute;left:23%;top:0;bottom:0;width:3px;background:#fff8;box-shadow:0 0 22px #fff3}
.sing-label{position:absolute;bottom:9px;left:23%;transform:translateX(-50%);font-size:.55rem;letter-spacing:.12em;color:var(--muted);white-space:nowrap}
.note-block{position:absolute;height:29px;border-radius:9px;background:#627be0cc;border:1px solid #b4c1ff;color:white;font-size:.75rem;font-weight:700;text-align:left;padding:5px 12px;transform:translateY(-50%);white-space:nowrap;box-shadow:0 3px 15px #0004}
.note-block.active{background:#7d90ed;border-color:#e2e6ff}
.note-block.hit{background:#43cda1;border-color:#c9ffeb;color:#082e23;box-shadow:0 0 24px #72f0bd77}
.voice-marker{position:absolute;left:23%;width:34px;height:34px;border-radius:50%;background:white;color:#15342b;font-size:24px;transform:translate(-50%,-50%);z-index:3;box-shadow:0 0 21px #fff8;transition:top .07s linear}
.range-cue{position:absolute;left:calc(23% + 22px);z-index:4;color:var(--amber);font-size:.7rem;font-weight:750;background:#2a2016dd;padding:4px 7px;border-radius:7px}
.range-cue.low{bottom:7px}
.range-cue.high{top:7px}
.lane-prompt{position:absolute;top:43%;left:25%;right:8%;padding:14px;background:#0b1b27e8;border:1px solid #37546a;border-radius:11px;font-size:1.05rem;font-weight:750;z-index:4}
.game-meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:.7rem;margin-top:7px}
progress{width:100%;height:5px;appearance:none;border:0;border-radius:5px;margin-top:10px;overflow:hidden;background:#243f4d}
progress::-webkit-progress-bar{background:#243f4d}
progress::-webkit-progress-value{background:var(--mint)}
progress::-moz-progress-bar{background:var(--mint)}
.results{padding:20px 14px;margin-top:16px;border:1px solid #72f0bd55;border-radius:16px;background:#142e2b}
.stars{font-size:1.8rem;color:#ffd885}
.results h3{font-size:1.4rem;margin:6px 0}
.results p{color:var(--muted);font-size:.85rem}
.note-results{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:14px 0}
.note-results span{font-size:.76rem}

.error{padding:14px;border:1px solid #b47a40;border-radius:12px;color:#ffe0b9;background:#372616;margin-top:14px}
.settings,.practice-help{border:1px solid var(--line);border-radius:15px;margin-top:14px;background:#0d1b25;color:var(--muted);font-size:.82rem;line-height:1.6}
.settings summary,.practice-help summary{color:var(--text);cursor:pointer;min-height:48px;padding:12px 16px}
.settings summary span{font-weight:750}
.settings summary small{margin-left:10px;color:var(--muted)}
.settings-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:4px 16px 18px;border-top:1px solid var(--line)}
.setting,fieldset{padding-top:14px}
.setting label{display:flex;justify-content:space-between;font-weight:650}
.setting select{width:100%;margin-top:7px}
.setting output{color:var(--mint);font-size:.75rem}
input[type=range]{width:100%;height:28px;accent-color:var(--mint);margin:7px 0 0}
fieldset{border:0;margin:0;min-width:0}
legend{font-size:.85rem;font-weight:650;margin-bottom:7px}
.segmented{display:flex;background:#172b39;border-radius:10px;padding:3px}
.segmented label{flex:1;position:relative}
.segmented input{position:absolute;opacity:0}
.segmented span{display:block;padding:9px 2px;text-align:center;border-radius:8px;font-size:.66rem}
.segmented input:checked+span{background:#345165}
.segmented input:focus-visible+span{outline:2px solid var(--mint)}
.practice-help p{max-width:82ch;margin:0 16px 12px}

body[data-pitch=on] .singing-note,body[data-pitch=on] .heard-note{color:var(--mint)}
body[data-pitch=on] .singing-note{animation:float-note 1.3s ease-in-out infinite alternate}
body[data-pitch=low] .singing-note,body[data-pitch=high] .singing-note,body[data-pitch=low] .heard-note,body[data-pitch=high] .heard-note{color:var(--amber)}
body[data-pitch=low] .needle,body[data-pitch=high] .needle{background:var(--amber)}
body[data-perfect=true] .stage{border-color:var(--mint);box-shadow:0 0 45px #72f0bd2b,inset 0 0 60px #72f0bd0d}
body[data-perfect=true] .singing-note{color:#c6ffe5;text-shadow:0 0 22px #72f0bd,0 0 60px #72f0bd88;animation:perfect-note .8s ease-in-out infinite alternate}
body[data-perfect=true] .perfect-badge{opacity:1}
body[data-perfect=true] .halo{border-color:#72f0bd99;box-shadow:0 0 25px #72f0bd44;animation:halo 1.5s ease-out infinite}
body[data-perfect=true] .spark{opacity:1;animation:spark 1.3s ease-in-out infinite alternate}
body[data-perfect=true] .voice-marker{background:var(--mint);box-shadow:0 0 30px var(--mint);border:3px solid #e0fff0}
body[data-perfect=true] .instruction{color:var(--mint)}

@keyframes float-note{to{transform:translateY(-5px)}
}

@keyframes perfect-note{to{transform:scale(1.16) rotate(-8deg)}
}

@keyframes halo{from{transform:scale(.85);opacity:.9}
to{transform:scale(1.6);opacity:0}
}

@keyframes spark{to{transform:translateY(-8px) scale(1.35)}
}


@media(max-width:820px){main{padding:18px 14px max(22px,env(safe-area-inset-bottom))}
.setup{display:block}
.mode-switch{width:100%;margin-bottom:10px}
.mode-switch button{flex:1}
.quick-choice{flex-wrap:wrap}
.headphone-quick{margin-left:0}
.settings-grid{grid-template-columns:1fr 1fr}
.stage{padding:18px 14px 22px}
.pitch-lane{height:clamp(290px,42vh,390px)}
}

@media(max-width:500px){.privacy{display:none}
.welcome{padding:0}.welcome-card{min-height:100dvh;max-height:100dvh;border-radius:0;padding-top:max(16px,env(safe-area-inset-top));padding-bottom:max(24px,env(safe-area-inset-bottom))}.welcome-panel{padding-top:26px}.welcome-panel h2{font-size:2rem}.welcome-note-control strong{font-size:3rem}
.quick-choice{gap:12px}
.target-card{width:100%;justify-content:space-between}
.exercise-choice,.headphone-quick{max-width:none;width:100%}
.target-card>select{width:68px}
.stage-top{gap:5px}
.game-heading h2{font-size:1.25rem}
.score strong{font-size:1.4rem}
.instruction{font-size:1.2rem}
.settings-grid{grid-template-columns:1fr}
.transport button{font-size:.82rem;padding:10px 12px}
.pitch-lane{height:300px}
.sequence{gap:4px}
.sequence span{font-size:.68rem}
.note-block{font-size:.65rem}
.settings summary small{display:block;margin:0}
.headphone-option{font-size:.88rem}
}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}
.halo{display:none}
body[data-perfect=true] .spark{opacity:1}
}