main{max-width:1000px;margin:0 auto;padding:130px 16px 24px;display:grid;gap:16px}
.card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;padding:24px;box-shadow:var(--card-shadow);display:grid;gap:18px}
.file-header{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
h1{font-size:20px;margin:0;flex:1}h2{font-size:15px;margin:0;font-weight:500}
.mute{color:var(--text-secondary);font-size:14px}.val{color:var(--accent-color);font-weight:700;font-size:22px}
button.s{background:var(--bg-primary);color:var(--text-primary);border:2px solid var(--border-color);border-radius:12px;padding:9px 16px;font:inherit;cursor:pointer}
button.s:hover{border-color:var(--accent-color)}
.pri{background:var(--accent-color);border:0;color:var(--text-primary);font-weight:700;padding:13px 22px;border-radius:14px;font:inherit;font-weight:700;cursor:pointer;width:100%}
canvas{width:100%;display:block;border-radius:6px;background:var(--accent-light);touch-action:none}
#wave{height:150px;cursor:crosshair}#prev{height:110px}
.tr{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}
#time{font:15px ui-monospace,Menlo,monospace;color:var(--text-secondary)}
.ctl{display:flex;gap:18px;align-items:center}
.ib{background:none;border:0;color:var(--text-primary);cursor:pointer;padding:6px;display:grid}
#play{width:64px;height:64px;border-radius:50%;border:0;background:var(--accent-color);color:var(--text-primary);cursor:pointer;display:grid;place-items:center;box-shadow:var(--card-shadow)}
svg{width:24px;height:24px;fill:currentColor}
.vol{display:flex;gap:10px;align-items:center;justify-content:flex-end}.vol input{width:110px}
.line{display:flex;justify-content:space-between;align-items:center;gap:12px}
.sep{border:0;border-top:1px solid var(--border-color);margin:0}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:14px;border-radius:7px;background:linear-gradient(to right,var(--accent-color) var(--p,0%),var(--border-color) var(--p,0%));outline:0;margin:10px 0}
input[type=range]::-webkit-slider-runnable-track{height:14px;background:transparent}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;margin-top:-6px;border-radius:50%;background:var(--bg-primary);border:3px solid var(--accent-color);cursor:pointer}
input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--bg-primary);border:3px solid var(--accent-color);cursor:pointer}
.vol input,#zoom,#pan{height:10px}.vol input::-webkit-slider-thumb{width:22px;height:22px;margin-top:-6px}
input[type=number],select{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-color);border-radius:14px;padding:11px 14px;font:inherit;text-align:center;width:104px}
select{width:auto;text-align:left}
.sw{display:flex;justify-content:space-between;align-items:center;background:var(--bg-primary);border-radius:16px;padding:16px 18px;gap:10px}
.sw input{display:none}.sw i{width:50px;height:30px;border-radius:15px;background:var(--border-color);position:relative;flex:none;transition:.15s}
.sw i:after{content:"";position:absolute;left:4px;top:4px;width:22px;height:22px;border-radius:50%;background:var(--bg-primary);transition:.15s}
.sw input:checked+i{background:var(--accent-color)}.sw input:checked+i:after{left:24px;background:#fff}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media(max-width:560px){.two{grid-template-columns:1fr}.tr{grid-template-columns:1fr}.vol{justify-content:flex-start}}
.bar{height:6px;background:var(--border-color);border-radius:3px;overflow:hidden}.bar i{display:block;height:100%;width:0;background:var(--accent-color)}
#dots{display:flex;gap:5px;flex-wrap:wrap;min-height:14px}
#dots b{width:10px;height:10px;border-radius:50%;background:var(--border-color)}#dots b.d{width:14px;height:14px;margin-top:-2px;background:var(--border-color)}#dots b.on{background:var(--accent-hover)}
#pos{font:600 14px ui-monospace,Menlo,monospace}
.sm{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.sm input{width:120px;margin:0}
details summary{cursor:pointer;font-size:19px;font-weight:500}
.how{display:grid;gap:10px;margin:14px 0 0;padding-left:22px}.how b{color:var(--accent-hover);font-weight:600}
button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,.btn:focus-within{outline:2px solid var(--accent-hover);outline-offset:4px}


.file-header h2{flex:1;font-size:1.2rem;font-weight:700}
.file-header .mute{overflow-wrap:anywhere}
.btn{display:inline-flex;align-items:center;justify-content:center}
.pri:hover,#play:hover{background:var(--accent-hover)}
.sw{position:relative}.sw input{display:block;position:absolute;width:1px;height:1px;opacity:0}.sw input:focus-visible+i{outline:2px solid var(--accent-hover);outline-offset:4px}
.line{flex-wrap:wrap}.card,.tr>*{min-width:0}
@media(max-width:560px){main{padding-top:120px}.card{padding:1rem}.file-header .mute{flex-basis:100%;order:3}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

.pri:hover,#play:hover{color:#fff}

/* One compact file action, with the filename beside it after loading. */
.upload-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.upload-copy{flex:1;min-width:0;overflow-wrap:anywhere}
.upload-row .btn{min-height:44px}
@media(max-width:560px){.upload-row{gap:.5rem}.upload-copy{flex-basis:100%}}

[hidden]{display:none!important}
#editor{display:grid;gap:16px}
.intro h2{font-size:1.3rem;font-weight:700}
.intro .how{margin:0;padding-left:1.4rem;color:var(--text-secondary)}
#uploadSection{display:grid;gap:24px}
.upload-tabs{display:flex;border:1px solid var(--border-color);border-radius:16px;padding:6px;background:var(--bg-secondary)}
.upload-tabs button{flex:1;min-height:48px;border:0;border-radius:12px;background:transparent;color:var(--text-secondary);font:inherit;cursor:pointer}
.upload-tabs button[aria-pressed="true"]{background:var(--accent-light);color:var(--text-primary);font-weight:700}
.upload-drop{width:100%;min-height:340px;padding:40px 16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;border:2px dashed var(--accent-color);border-radius:20px;background:var(--bg-secondary);color:var(--text-secondary);font:inherit;cursor:pointer}
.upload-drop:hover,.upload-drop.is-dragging{background:var(--accent-light);border-color:var(--accent-hover)}
.upload-drop strong{font-size:1.5rem;color:var(--text-primary)}
.upload-icon{display:grid;place-items:center;width:64px;height:64px;border-radius:50%;background:var(--accent-light);color:var(--accent-hover);font-size:40px}
.formats{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.formats span{background:var(--accent-light);padding:4px 12px;border-radius:20px;font-size:.85rem}
.upload-drop small{font-size:.85rem}
#uploadStatus:empty{display:none}
.url-panel{gap:12px}.url-row{display:flex;gap:12px;flex-wrap:wrap}
#audioUrl{flex:1;min-width:0;width:100%;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-primary);color:var(--text-primary);font:inherit;padding:12px}
button:disabled{opacity:.6;cursor:wait}
@media(max-width:560px){.upload-drop{min-height:300px}.upload-drop strong{font-size:1.2rem}.url-row .btn{width:100%}}

/* Keep the source waveform and its selection controls in one compact card. */
.fixed-header{position:relative}
main{padding-top:24px}
.track-editor{gap:12px;padding:20px}
.track-editor #wave{height:clamp(80px,18vh,140px)}
.loop-points{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.loop-points label{font-weight:700;font-size:.95rem}
.loop-points .val{font-size:1rem;color:var(--accent-hover);font-variant-numeric:tabular-nums}
.loop-points input[type=range]{margin:12px 0 6px;height:8px}
.waveform-tools{gap:10px;font-size:.8rem}
.waveform-tools span{flex:1}
.waveform-tools input{width:90px}
.track-editor #play{width:48px;height:48px}
.track-editor .ib{min-width:36px;min-height:36px;place-items:center}
.track-editor .ctl{gap:10px}
.track-editor .file-header .btn{padding:.6rem 1rem;min-height:44px}
.track-editor #name{flex:1;text-align:right;font-size:.8rem}
@media(max-width:560px){
 main{padding-top:16px}
 .track-editor{padding:14px;gap:10px}
 .track-editor .file-header{gap:8px}
 .track-editor .file-header .mute{flex-basis:auto;order:0;text-align:left}
 .track-editor .file-header h2{flex-basis:100%;font-size:1rem}
 .track-editor .tr{grid-template-columns:1fr auto;gap:8px}
 .track-editor .vol{grid-column:1/-1}
 .track-editor .vol input{flex:1;max-width:160px}
 .loop-points{gap:12px}
 .waveform-tools span{flex-basis:100%}
 .waveform-tools input{width:70px;flex:1;min-width:0}
}

.fade-controls label{display:flex;justify-content:space-between;gap:12px;font-weight:700;font-size:.9rem}
.fade-controls output{font-weight:400;color:var(--text-secondary)}
.export-plan{display:grid;gap:12px;padding:16px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-primary);min-width:0}
.export-plan h2{font-size:1rem;font-weight:700}.export-plan h3{font-size:.9rem}
.export-plan svg{width:100%;height:auto;fill:none;overflow:visible}
.export-plan text{font:12px Inter,system-ui,sans-serif;fill:var(--text-primary)}
.export-plan .mute{font-size:.8rem}

#prev{cursor:crosshair;touch-action:none}.preview-hint{font-size:.8rem}

.tempo-options{display:flex;gap:12px;flex-wrap:wrap;align-items:end}.tempo-options label{display:grid;gap:6px;font-size:.85rem;font-weight:700}.tempo-options select{max-width:100%;font-size:.85rem;padding:9px 12px}.tempo-options button{min-height:42px}

.control-section{display:grid;gap:14px;min-width:0;border:1px solid var(--border-color);border-radius:12px;padding:16px;background:var(--bg-secondary)}
.control-title{display:flex;gap:9px;align-items:center;min-width:0}
.info-button{display:inline-grid;place-items:center;flex:none;width:25px;height:25px;border:1px solid var(--accent-hover);border-radius:50%;background:transparent;color:var(--accent-hover);font:700 .85rem Georgia,serif;cursor:pointer;padding:0}
.info-button:hover,.info-button[aria-expanded="true"]{background:var(--accent-light)}
.control-help{padding:12px;border-left:3px solid var(--accent-color);border-radius:6px;background:var(--accent-light);color:var(--text-primary);font-size:.85rem;line-height:1.6}
@media(max-width:560px){.control-section{padding:12px}.info-button{width:30px;height:30px}}

.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.section-heading h2{font-size:19px}.sw.section-toggle{padding:0;background:none;border-radius:0;flex:none}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}input:disabled{opacity:.5;cursor:not-allowed}
.user-guide summary{font-weight:700}.guide-intro{padding-top:12px}.guide-intro h2{font-size:1.15rem;font-weight:700;margin-bottom:6px}.guide-intro p{color:var(--text-secondary);font-size:.9rem}.guide-steps{counter-reset:guide;list-style:none;display:grid;grid-template-columns:1fr;gap:14px;margin:18px 0;padding:0}.guide-steps li{counter-increment:guide;position:relative;border:1px solid var(--border-color);border-radius:12px;padding:16px 16px 16px 52px}.guide-steps li::before{content:counter(guide,decimal-leading-zero);position:absolute;left:14px;top:16px;color:var(--accent-hover);font-size:.85rem;font-weight:700}.guide-steps h3{font-size:.95rem;margin:0 0 7px}.guide-steps p,.guide-note p{font-size:.85rem;line-height:1.65;color:var(--text-secondary)}.guide-note{border-left:3px solid var(--accent-color);padding:12px 16px;background:var(--accent-light);border-radius:6px}.guide-note strong{font-size:.85rem}.guide-note p{margin-top:5px}@media(max-width:560px){.guide-steps{grid-template-columns:1fr}}

.sw.section-toggle input{inset:0;width:100%;height:100%;margin:0;z-index:1;cursor:pointer}.sw.section-toggle i{pointer-events:none}

/* Keep track identity readable; move actions rather than squeezing the name. */
.track-editor .file-header{display:grid;grid-template-columns:max-content minmax(0,1fr) auto;align-items:center;gap:12px}
.track-editor .file-header h2{white-space:nowrap;margin:0}
.track-editor #name{min-width:0;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;overflow-wrap:normal;order:0;text-align:left}
.file-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
#muteAudio{min-width:36px;min-height:36px;place-items:center;border-radius:8px}#muteAudio[aria-pressed="true"]{background:var(--accent-light);color:var(--accent-hover)}
@media(max-width:900px){.track-editor .file-header{grid-template-columns:max-content minmax(0,1fr)}.file-actions{grid-column:1/-1}}
@media(max-width:560px){.track-editor .file-header{grid-template-columns:minmax(0,1fr)}.track-editor #name{grid-column:1;order:0}.file-actions{justify-content:flex-start}.track-editor .file-actions .btn{padding:.6rem .8rem;font-size:.8rem}}

/* Inactive sections keep their heading, switch and optional help only. */
.control-section:has(#loopCountEnabled:not(:checked)) > :not(.section-heading):not(.control-help),
.control-section:has(#crossfadeEnabled:not(:checked)) > :not(.section-heading):not(.control-help),
.control-section:has(#mf:not(:checked)) > .fade-controls,
.control-section:has(#mf:not(:checked)) .sw .mute{display:none}

.bpm-controls{display:grid;gap:14px}.fade-controls{padding:16px;background:var(--bg-primary);border-radius:12px;border:1px solid var(--border-color)}