*,:before,:after{box-sizing:border-box;margin:0;padding:0}fieldset{border:none;min-width:0;padding:0}legend{padding:0}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}:focus-visible{outline:2px solid var(--accent-blue);outline-offset:2px}:root{--bg-primary:#0a0a0f;--bg-secondary:#12121a;--bg-card:#1a1a25;--bg-hover:#22222f;--border-color:#2a2a3a;--text-primary:#e8e8f0;--text-secondary:#8888a0;--accent-blue:#00d4ff;--color-break:#ff6b35;--color-melody:#00d4ff;--color-vocal:#a855f7;--color-loop:#22c55e;--color-error:#ef4444;--radius:10px}body{background:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}input:focus,select:focus,button:focus,textarea:focus{outline:2px solid var(--accent-blue);outline-offset:2px}input[type=range]:focus,input[type=checkbox]:focus,input[type=radio]:focus{outline-offset:3px}#root{max-width:960px;margin:0 auto;padding:2rem 1.5rem 4rem}main{display:block}button:focus,input:focus,select:focus,textarea:focus,a:focus{outline:2px solid var(--accent-blue);outline-offset:2px}button:focus:not(:focus-visible),input:focus:not(:focus-visible),select:focus:not(:focus-visible),textarea:focus:not(:focus-visible),a:focus:not(:focus-visible){outline:none}.app-header{text-align:center;margin-bottom:2.5rem}.app-header h1{background:linear-gradient(135deg, var(--accent-blue), var(--color-vocal));color:#0000;-webkit-background-clip:text;background-clip:text;margin-bottom:.3rem;font-size:2.2rem;font-weight:700}.app-header .tagline{color:var(--text-secondary);font-size:.95rem}.upload-section{margin-bottom:2rem}.drop-zone{border:2px dashed var(--border-color);border-radius:var(--radius);text-align:center;cursor:pointer;background:var(--bg-secondary);padding:2.5rem 1.5rem;transition:border-color .2s,background .2s}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent-blue);background:#00d4ff0a}.drop-zone:focus{outline:2px solid var(--accent-blue);outline-offset:2px}.drop-zone p{color:var(--text-secondary);margin-bottom:1rem;font-size:.95rem}.drop-zone .browse-btn{background:var(--accent-blue);color:var(--bg-primary);cursor:pointer;border:none;border-radius:6px;padding:.5rem 1.5rem;font-size:.9rem;font-weight:600;transition:opacity .2s;display:inline-block}.drop-zone .browse-btn:hover{opacity:.85}.url-input-row{gap:.75rem;margin-top:1rem;display:flex}.url-input-row input{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary);border-radius:6px;outline:none;flex:1;padding:.6rem 1rem;font-size:.9rem;transition:border-color .2s}.url-input-row input::placeholder{color:var(--text-secondary)}.url-input-row input:focus{border-color:var(--accent-blue)}.url-input-row button{background:var(--accent-blue);color:var(--bg-primary);cursor:pointer;white-space:nowrap;border:none;border-radius:6px;padding:.6rem 1.4rem;font-size:.9rem;font-weight:600;transition:opacity .2s}.url-input-row button:hover{opacity:.85}.info-bar{background:var(--bg-secondary);border-radius:var(--radius);flex-wrap:wrap;gap:1.5rem;margin-bottom:1.5rem;padding:.85rem 1.2rem;display:flex}.info-bar .info-item{color:var(--text-secondary);font-size:.9rem}.info-bar .info-item span{color:var(--text-primary);font-weight:600}.waveform-section{background:var(--bg-secondary);border-radius:var(--radius);margin-bottom:1.5rem;padding:1.2rem}.waveform-container{border-radius:6px;margin-bottom:.75rem;overflow:hidden}.section-timeline{border-radius:4px;height:22px;margin-bottom:.75rem;position:relative;overflow:hidden}.section-bar-item{color:#fff;text-transform:uppercase;letter-spacing:.03em;white-space:nowrap;text-overflow:ellipsis;border-radius:2px;justify-content:center;align-items:center;height:100%;font-size:.65rem;font-weight:600;display:flex;position:absolute;top:0;overflow:hidden}.waveform-controls{align-items:center;gap:1rem;display:flex}.play-btn{background:var(--accent-blue);color:var(--bg-primary);cursor:pointer;border:none;border-radius:6px;padding:.45rem 1.2rem;font-size:.85rem;font-weight:600;transition:opacity .2s}.play-btn:hover{opacity:.85}.time-display{color:var(--text-secondary);font-variant-numeric:tabular-nums;font-size:.85rem}.sample-points-section{margin-bottom:1.5rem}.sample-points-section h2{margin-bottom:.75rem;font-size:1.1rem;font-weight:600}.sample-list{flex-direction:column;gap:.6rem;max-height:400px;padding-right:.25rem;display:flex;overflow-y:auto}.sample-list::-webkit-scrollbar{width:5px}.sample-list::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.sample-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;transition:background .15s,border-color .15s;display:flex}.sample-card:hover{background:var(--bg-hover);border-color:var(--text-secondary)}.sample-card .card-main{cursor:pointer;align-items:center;gap:.75rem;padding:.85rem 1rem;display:flex}.sample-card .card-expanded{border-top:1px solid var(--border-color);padding:0 1rem .85rem}.card-describing{color:var(--text-secondary);align-items:center;gap:.5rem;padding:.6rem 0;font-size:.82rem;display:flex}.describe-spinner{border:2px solid var(--border-color);border-top-color:var(--accent-blue);border-radius:50%;flex-shrink:0;width:14px;height:14px;animation:.7s linear infinite spin}.card-description{color:var(--text-secondary);padding:.6rem 0;font-size:.82rem;line-height:1.4}.card-actions{gap:.5rem;padding-top:.4rem;display:flex}.expand-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:.2rem .4rem;font-size:.7rem;transition:color .15s}.expand-btn:hover{color:var(--text-primary)}.sample-card .card-play-btn{cursor:pointer;width:32px;height:32px;color:var(--bg-primary);border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.75rem;font-weight:700;transition:opacity .15s;display:flex}.sample-card .card-play-btn:hover{opacity:.8}.sample-card .card-body{flex:1;min-width:0}.sample-card .card-timestamp{font-variant-numeric:tabular-nums;color:var(--text-primary);font-size:.85rem;font-weight:500}.sample-card .card-bpm{color:var(--text-secondary);margin-top:.15rem;font-size:.78rem}.sample-card .card-right{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:.35rem;display:flex}.reason-badge{text-transform:uppercase;letter-spacing:.03em;border-radius:99px;padding:.15rem .6rem;font-size:.72rem;font-weight:600;display:inline-block}.reason-badge.break{color:var(--color-break);background:#ff6b3526}.reason-badge.melody{color:var(--color-melody);background:#00d4ff26}.reason-badge.vocal{color:var(--color-vocal);background:#a855f726}.reason-badge.loop{color:var(--color-loop);background:#22c55e26}.confidence-bar{background:var(--border-color);border-radius:2px;width:60px;height:4px;overflow:hidden}.confidence-bar .fill{border-radius:2px;height:100%;transition:width .3s}.describe-btn,.export-btn{border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border-radius:6px;padding:.3rem .7rem;font-size:.72rem;font-weight:600;transition:background .15s,border-color .15s,color .15s}.describe-btn:hover,.export-btn:hover:not(:disabled){background:var(--bg-hover);border-color:var(--accent-blue);color:var(--text-primary)}.export-btn:disabled{opacity:.5;cursor:not-allowed}.source-links-section{margin-bottom:1.5rem}.source-links-section h2{margin-bottom:.75rem;font-size:1.1rem;font-weight:600}.source-links-row{flex-wrap:wrap;gap:.75rem;display:flex}.source-link-btn{border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);cursor:pointer;border-radius:8px;align-items:center;gap:.5rem;padding:.65rem 1.4rem;font-size:.9rem;font-weight:500;text-decoration:none;transition:background .15s,border-color .15s;display:inline-flex}.source-link-btn:hover{background:var(--bg-hover);border-color:var(--text-secondary)}.loading-overlay{flex-direction:column;justify-content:center;align-items:center;padding:4rem 1rem;display:flex}.spinner{border:3px solid var(--border-color);border-top-color:var(--accent-blue);border-radius:50%;width:40px;height:40px;margin-bottom:1rem;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay p{color:var(--text-secondary);font-size:.95rem}.progress-bar-container{background:var(--border-color);border-radius:2px;width:200px;height:4px;margin-top:.75rem;overflow:hidden}.progress-bar-fill{background:var(--accent-color,#6366f1);border-radius:2px;height:100%;transition:width .3s}.error-box{border-radius:var(--radius);text-align:center;background:#ef444414;border:1px solid #ef444440;margin-bottom:1.5rem;padding:1.2rem}.error-box p{color:var(--color-error);margin-bottom:.75rem;font-size:.9rem}.error-box button{border:1px solid var(--color-error);color:var(--color-error);cursor:pointer;background:0 0;border-radius:6px;padding:.5rem 1.4rem;font-size:.85rem;font-weight:500;transition:background .15s}.error-box button:hover{background:#ef44441a}@media (width<=600px){#root{padding:1.2rem 1rem 3rem}.app-header h1{font-size:1.7rem}.info-bar{gap:.75rem}.url-input-row,.source-links-row{flex-direction:column}.stem-row{flex-direction:column;gap:.5rem}.stem-label{min-width:unset}.sample-card{flex-wrap:wrap;gap:.5rem}.sample-card .card-right{flex-flow:wrap;justify-content:flex-start;gap:.4rem;width:100%}.sp-filters{flex-direction:column}.sp-filters select{width:100%}}.stem-generate-section{text-align:center;margin-bottom:1.5rem}.generate-stems-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;border-radius:8px;padding:.65rem 1.8rem;font-size:.9rem;font-weight:500;transition:background .15s,border-color .15s}.generate-stems-btn:hover:not(:disabled){background:var(--bg-hover);border-color:var(--accent-blue)}.generate-stems-btn:disabled{opacity:.6;cursor:not-allowed}.stem-waveforms-section{margin-bottom:1.5rem}.stem-section-toggle{cursor:pointer;background:0 0;border:none;align-items:center;gap:.5rem;width:100%;margin-bottom:.75rem;padding:0;display:flex}.stem-section-toggle h2{color:var(--text-primary);margin:0;font-size:1.1rem;font-weight:600}.toggle-arrow{color:var(--text-secondary);font-size:.9rem}.stem-waveforms-list{flex-direction:column;gap:.5rem;display:flex}.stem-row{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;align-items:center;gap:.75rem;padding:.6rem .8rem;display:flex}.stem-label{align-items:center;gap:.35rem;min-width:80px;font-size:.82rem;font-weight:600;display:flex}.stem-emoji{font-size:1rem}.stem-name{white-space:nowrap}.stem-waveform-wrap{border-radius:4px;flex:1;min-width:0;overflow:hidden}.stem-controls{flex-shrink:0;gap:.35rem;display:flex}.stem-toggle{cursor:pointer;background:0 0;border:1px solid;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;padding:0;font-size:.7rem;transition:background .15s,opacity .15s;display:flex}.stem-toggle:hover{background:#ffffff0d}.stem-toggle.muted{opacity:.5}.pref-section-label{color:var(--text-primary);margin-bottom:.5rem;font-size:.9rem;font-weight:600;display:block}.app-header-title-row{justify-content:center;align-items:center;gap:.6rem;margin-bottom:.3rem;display:inline-flex}.app-header-title-row h1{margin-bottom:0}.pro-badge{background:linear-gradient(135deg, var(--accent-blue), var(--color-vocal));color:var(--bg-primary);letter-spacing:.08em;text-transform:uppercase;vertical-align:middle;border-radius:6px;flex-shrink:0;padding:.15rem .55rem;font-size:.65rem;font-weight:800;line-height:1.6;display:inline-block}.free-plan-label{border:1px solid var(--border-color);color:var(--text-secondary);letter-spacing:.05em;cursor:pointer;vertical-align:middle;background:0 0;border-radius:6px;flex-shrink:0;padding:.15rem .55rem;font-size:.65rem;font-weight:600;line-height:1.6;transition:border-color .15s,color .15s;display:inline-block}.free-plan-label:hover{border-color:var(--accent-blue);color:var(--accent-blue)}.upgrade-modal-overlay{-webkit-backdrop-filter:blur(4px);z-index:1000;background:#000000b3;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.upgrade-modal{background:var(--bg-card);border:1px solid var(--border-color);text-align:center;border-radius:16px;width:100%;max-width:400px;padding:2.5rem 2rem 2rem;position:relative;box-shadow:0 24px 60px #0009}.upgrade-modal-close{border:1px solid var(--border-color);width:28px;height:28px;color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:.75rem;transition:border-color .15s,color .15s;display:flex;position:absolute;top:1rem;right:1rem}.upgrade-modal-close:hover{border-color:var(--text-secondary);color:var(--text-primary)}.upgrade-modal-heading{background:linear-gradient(135deg, var(--accent-blue), var(--color-vocal));color:#0000;-webkit-background-clip:text;background-clip:text;margin-bottom:.4rem;font-size:1.6rem;font-weight:700}.upgrade-modal-subtext{color:var(--text-secondary);margin-bottom:1.5rem;font-size:.9rem}.upgrade-feature-list{text-align:left;background:var(--bg-secondary);border-radius:10px;flex-direction:column;gap:.6rem;margin-bottom:1.75rem;padding:1rem 1.2rem;list-style:none;display:flex}.upgrade-feature-list li{color:var(--text-primary);align-items:center;gap:.65rem;font-size:.9rem;display:flex}.upgrade-feature-icon{flex-shrink:0;font-size:1rem}.upgrade-price{margin-bottom:1.5rem;line-height:1}.upgrade-price-amount{color:var(--text-primary);font-size:2.6rem;font-weight:800}.upgrade-price-period{color:var(--text-secondary);margin-left:.2rem;font-size:1rem}.upgrade-modal-actions{flex-direction:column;gap:.65rem;display:flex}.btn-upgrade{background:var(--accent-blue);width:100%;color:var(--bg-primary);cursor:pointer;border:none;border-radius:8px;padding:.8rem 1.5rem;font-size:1rem;font-weight:700;transition:opacity .2s,transform .1s}.btn-upgrade:hover{opacity:.9;transform:translateY(-1px)}.btn-upgrade:active{transform:translateY(0)}.btn-upgrade-ghost{width:100%;color:var(--text-secondary);border:1px solid var(--border-color);cursor:pointer;background:0 0;border-radius:8px;padding:.7rem 1.5rem;font-size:.9rem;font-weight:500;transition:border-color .15s,color .15s}.btn-upgrade-ghost:hover{border-color:var(--text-secondary);color:var(--text-primary)}@media (width<=600px){.upgrade-modal{padding:2rem 1.25rem 1.5rem}.upgrade-price-amount{font-size:2rem}}