:root{
  --bg:#14121f; --bg2:#1c1a2b; --card:#232136; --line:#34314d; --fg:#f3f1ff; --muted:#a29fbd;
  --acc:#ff7a59; --acc2:#9b5cff; --ok:#3ddc97; --err:#ff5c7a;
  --loop:rgba(155,92,255,.22); --wave:#5b5780; --wave-on:#ff9a7f;
  --r:14px; --gutter:16px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light){
  :root{ --bg:#f7f6fb; --bg2:#ffffff; --card:#ffffff; --line:#e3e0ef; --fg:#1d1a2e; --muted:#6b6785;
    --wave:#c9c5dc; --wave-on:#ff7a59; --loop:rgba(155,92,255,.16); color-scheme: light; }
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--fg);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,Inter,Arial,sans-serif;
  display:flex;flex-direction:column;min-height:100vh;-webkit-tap-highlight-color:transparent;overflow-x:hidden}
svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
button{font:inherit;color:inherit}
.mono{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.muted{color:var(--muted)} .small{font-size:.85rem} .err{color:var(--err)}
[hidden]{display:none!important}
.noscript{padding:20px;text-align:center}

.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px var(--gutter);padding-top:max(12px,env(safe-area-inset-top));max-width:880px;width:100%;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:600;font-size:1.15rem;letter-spacing:-.01em}
.brand b{color:var(--acc);font-weight:800}
.logo{width:34px;height:34px;stroke:none}
.top-actions{display:flex;gap:8px}

main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:0 var(--gutter)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);background:var(--card);
  border-radius:999px;padding:10px 18px;cursor:pointer;user-select:none;transition:transform .08s,background .15s,border-color .15s;min-height:44px}
.btn:active{transform:scale(.97)}
.btn:focus-visible,input:focus-visible,canvas:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
.btn.primary{background:linear-gradient(135deg,var(--acc),var(--acc2));border:0;color:#fff;font-weight:600}
.btn.ghost{background:transparent}
.btn.small{padding:6px 12px;min-height:36px;font-size:.9rem}
.btn.tiny{padding:2px 10px;min-height:30px;font-size:.8rem}
.btn.big{padding:16px 28px;font-size:1.05rem}
.btn.wide{width:100%;padding:14px}
.btn:disabled{opacity:.45;cursor:not-allowed}

/* Dropzone */
.dropzone{display:flex;align-items:center;justify-content:center;min-height:62vh}
.drop-inner{text-align:center;max-width:560px;padding:40px 8px}
.drop-icon{width:84px;height:84px;margin:0 auto 18px;border-radius:24px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(255,122,89,.18),rgba(155,92,255,.18));color:var(--acc)}
.drop-icon svg{width:40px;height:40px}
h1{font-size:clamp(1.6rem,4.8vw,2.3rem);line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}
.pills{list-style:none;padding:0;margin:26px 0 0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.pills li{border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.85rem;color:var(--muted)}

.drag-overlay{position:fixed;inset:0;background:rgba(20,18,31,.82);display:grid;place-items:center;z-index:50;
  font-size:1.4rem;font-weight:600;color:#fff;border:3px dashed var(--acc);margin:10px;border-radius:24px;pointer-events:none}

/* Player */
.player{padding:6px 0 24px}
.track{margin:6px 0 12px;min-width:0}
.track-title{font-weight:650;font-size:1.15rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.wave-wrap{position:relative;background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
#wave{display:block;width:100%;height:120px;touch-action:none;cursor:pointer}
.loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:10px;background:var(--bg2)}
.spinner{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--acc);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.timeline{display:flex;align-items:center;gap:10px;margin:12px 0 4px}
.timeline input{flex:1;min-width:0}
input[type=range]{-webkit-appearance:none;appearance:none;height:28px;background:transparent;cursor:pointer;width:100%}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:6px;background:var(--line)}
input[type=range]::-moz-range-track{height:6px;border-radius:6px;background:var(--line)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:#fff;margin-top:-8px;border:3px solid var(--acc);box-shadow:0 1px 4px rgba(0,0,0,.3)}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--acc)}

.transport{display:flex;justify-content:center;align-items:center;gap:18px;margin:6px 0 10px}
.btn.round{width:52px;height:52px;padding:0;border-radius:50%}
.btn.round.play{width:70px;height:70px;background:linear-gradient(135deg,var(--acc),var(--acc2));border:0;color:#fff}
.btn.round.play svg{width:28px;height:28px}
.play .i-pause{display:none} .play.playing .i-play{display:none} .play.playing .i-pause{display:block}

.loop-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin:4px 0 18px}
.btn.toggle[aria-pressed=true]{background:var(--acc2);border-color:var(--acc2);color:#fff}
#loopLabel{min-width:150px;text-align:center}

.controls{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ctrl{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 14px 12px;min-width:0}
.ctrl-head{display:flex;justify-content:space-between;align-items:baseline;font-weight:600}
.val{font-size:1.5rem;font-weight:700;color:var(--acc)}
.ctrl-row{display:flex;align-items:center;gap:8px;margin:6px 0}
.btn.step{width:40px;height:40px;min-height:40px;padding:0;border-radius:12px;font-size:1.3rem;flex:none}
.presets{display:flex;flex-wrap:wrap;gap:6px}
.presets button{border:1px solid var(--line);background:transparent;border-radius:8px;padding:4px 8px;font-size:.8rem;cursor:pointer;min-height:32px}
.presets button.on{background:var(--acc);border-color:var(--acc);color:#fff}
.fine{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.reset{grid-column:1/-1;justify-self:center}

.export-bar{position:sticky;bottom:0;padding:16px 0 max(12px,env(safe-area-inset-bottom));background:linear-gradient(to top,var(--bg) 70%,transparent);margin-top:8px}

.foot{text-align:center;padding:14px var(--gutter) 22px;display:flex;flex-direction:column;gap:4px}
@media (hover:none){.kbd-hint{display:none}}

/* Dialogs */
.dlg{border:1px solid var(--line);background:var(--bg2);color:var(--fg);border-radius:18px;padding:0;width:min(460px,calc(100vw - 32px))}
.dlg::backdrop{background:rgba(0,0,0,.55)}
.dlg form{padding:20px}
.dlg h2{margin:0 0 14px;font-size:1.2rem}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px;font-size:.9rem;color:var(--muted)}
.field input{background:var(--card);border:1px solid var(--line);color:var(--fg);border-radius:10px;padding:10px 12px;font-size:1rem;min-width:0;width:100%}
.field-row{display:flex;gap:8px;align-items:center}
.field-row input{flex:1}
.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{flex:1;border:0;background:transparent;padding:10px 0;cursor:pointer;color:var(--fg);min-height:42px}
.seg button+button{border-left:1px solid var(--line)}
.seg button.on{background:var(--acc);color:#fff;font-weight:600}
.check{display:flex;gap:8px;align-items:center;margin-bottom:10px;font-size:.9rem}
.dlg-actions{display:flex;gap:8px;align-items:center;margin-top:12px}
.spacer{flex:1}
.progress{margin:6px 0}
.progress .bar{height:8px;background:var(--line);border-radius:8px;overflow:hidden;margin-bottom:6px}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--acc),var(--acc2));transition:width .15s}

.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:12px;z-index:60;max-width:calc(100vw - 32px);font-size:.9rem;box-shadow:0 6px 24px rgba(0,0,0,.3)}

@media (max-width:640px){
  .controls{grid-template-columns:1fr}
  #wave{height:96px}
  .btn.round{width:48px;height:48px}
  .btn.round.play{width:64px;height:64px}
  #loopLabel{min-width:0;order:5;flex-basis:100%}
}