/* Pitch and Tempo Changer 1.0.0 | onlinepitchchanger.com | practice-deck layout: dark waveform deck + pitch and tempo faders with a link switch + calculator.
   Brand: #0067FF primary, #22B8F0 accent (waveform), #0F172A navy. Sizes in px (themes shrink rem); text ≥ 15px, labels ≥ 13px; contrast ≥ 4.5:1. */
.opc-ptc{--a-blue:#0067ff;--a-blue2:#0052cc;--a-cyan:#22b8f0;--a-navy:#0f172a;--a-navy2:#1e293b;--a-text:#334155;--a-muted:#475569;--a-light:#f0f7ff;--a-line:#d6e4f5;--a-ok:#15803d;--a-err:#b91c1c;
	max-width:1040px;margin:0 auto 1.75em;color:var(--a-text);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;box-sizing:border-box;text-align:left}
.opc-ptc *,.opc-ptc *::before,.opc-ptc *::after{box-sizing:border-box}
.opc-ptc [hidden]{display:none!important}
.opc-ptc p,.opc-ptc dl,.opc-ptc dd,.opc-ptc h2,.opc-ptc h3{margin:0}
.opc-ptc button,.opc-ptc select,.opc-ptc input{font:inherit;letter-spacing:normal;text-transform:none;box-shadow:none;margin:0}
.opc-ptc button{cursor:pointer;line-height:1.2}
.opc-ptc button:disabled{cursor:not-allowed}
.opc-ptc :focus-visible{outline:3px solid var(--a-blue);outline-offset:2px}
.opc-ptc-head{margin:0 0 12px}
.opc-ptc-title{margin:0;font-size:24px;line-height:1.25;font-weight:800;color:var(--a-navy);letter-spacing:-.01em}
.opc-ptc-lead{margin:4px 0 0;color:var(--a-muted);font-size:16px}

/* ---------- studio deck (dark) ---------- */
.opc-ptc-deck{border-radius:18px;background:var(--a-navy);color:#fff;padding:12px;box-shadow:0 0 0 1px #1e293b inset;transition:box-shadow .15s}
.opc-ptc.is-drag .opc-ptc-deck{box-shadow:0 0 0 3px var(--a-cyan) inset}
.opc-ptc .opc-ptc-deck :focus-visible{outline-color:var(--a-cyan)}
.opc-ptc-file{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;clip:rect(0 0 0 0)}
.opc-ptc-open{display:flex;width:100%;align-items:center;gap:12px;min-height:84px;padding:10px 14px;margin:0;border-radius:12px;background:var(--a-blue);color:#fff;cursor:pointer;transition:background .15s}
.opc-ptc-open:hover{background:var(--a-blue2)}
.opc-ptc-file:focus-visible+.opc-ptc-open{outline:3px solid var(--a-cyan);outline-offset:3px}
.opc-ptc-open svg{flex:0 0 34px;width:34px;height:34px}
.opc-ptc-opentext{display:flex;flex-direction:column;gap:2px;min-width:0}
.opc-ptc-opentext strong{font-size:20px;line-height:1.25;color:#fff}
.opc-ptc-opensub{font-size:15px;line-height:1.4;color:#fff}
.opc-ptc-tbtn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:10px;border:1px solid #64748b;background:transparent;color:#f1f5f9;font-weight:700;font-size:15px}
.opc-ptc-tbtn:hover,.opc-ptc-tbtn:focus{background:var(--a-navy2);color:#fff}
.opc-ptc-tbtn[aria-pressed=true]{background:var(--a-cyan);border-color:var(--a-cyan);color:var(--a-navy)}
.opc-ptc-tbtn:disabled{color:#94a3b8;border-color:#475569;background:transparent}
.opc-ptc-private{display:flex;align-items:flex-start;gap:6px;margin-top:8px;font-size:15px;color:#cbd5e1}
.opc-ptc-private svg{width:16px;height:16px;flex:0 0 16px;margin-top:3px;color:#4ade80}
.opc-ptc-bar{height:8px;border-radius:99px;background:#dbe7f7;overflow:hidden;margin-top:8px}
.opc-ptc-deck .opc-ptc-bar{background:#334155}
.opc-ptc-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--a-blue),var(--a-cyan));transition:width .2s}
.opc-ptc-bar.is-busy span{width:35%!important;animation:opc-ptc-slide 1.2s linear infinite}
@keyframes opc-ptc-slide{from{transform:translateX(-100%)}to{transform:translateX(300%)}}
.opc-ptc-status{margin-top:6px;font-size:15px;color:#e2e8f0;min-height:2.9em}
.opc-ptc-status[data-kind=busy]{font-weight:600}
.opc-ptc-status[data-kind=ok]{color:#4ade80;font-weight:600}
.opc-ptc-status[data-kind=ok]::before{content:"✓ "}
.opc-ptc-status[data-kind=error]{color:#fecaca;font-weight:700;background:#450a0a;border-radius:10px;padding:8px 10px}
.opc-ptc-status[data-kind=error]::before{content:"⚠ "}
.opc-ptc.is-loaded .opc-ptc-open{min-height:52px;padding:6px 12px;background:transparent;border:1px solid var(--a-blue);color:#fff}
.opc-ptc.is-loaded .opc-ptc-open:hover{background:var(--a-navy2)}
.opc-ptc.is-loaded .opc-ptc-opentext strong{font-size:16px}
.opc-ptc.is-loaded .opc-ptc-opensub{display:none}
.opc-ptc.is-loaded .opc-ptc-open svg{width:24px;height:24px;flex-basis:24px;color:var(--a-cyan)}

/* file info strip (like a track header) */
.opc-ptc-info{margin:6px 0 10px;padding:8px 10px;border-radius:10px;background:var(--a-navy2);font-size:15px;font-weight:600;color:#fff;overflow-wrap:anywhere}
.opc-ptc-infolabel{color:#cbd5e1;font-weight:700}
.opc-ptc-now{min-height:1.5em;margin:0 0 8px;font-size:16px;font-weight:700;color:#fff}
.opc-ptc-now b{color:var(--a-cyan)}
.opc-ptc-now[data-which=a] b{color:#fff;text-decoration:underline;text-underline-offset:3px}
.opc-ptc-wave{position:relative;height:120px;border-radius:10px;background:#0b1224;overflow:hidden;cursor:pointer;touch-action:pan-y;box-shadow:inset 0 0 0 1px #334155}
.opc-ptc-wave canvas{display:block;width:100%;height:100%}
.opc-ptc-waveempty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#cbd5e1;font-size:15px;text-align:center;padding:0 12px}
.opc-ptc-transport{display:flex;align-items:flex-end;flex-wrap:wrap;gap:10px 14px;margin-top:10px}
.opc-ptc-play{display:inline-flex;align-items:center;gap:8px;min-height:52px;padding:0 20px 0 14px;border-radius:99px;border:0;background:var(--a-blue);color:#fff;font-weight:800;font-size:17px}
.opc-ptc-play:hover,.opc-ptc-play:focus{background:var(--a-blue2);color:#fff}
.opc-ptc-play:disabled{background:#334155;color:#cbd5e1}
.opc-ptc-play svg{width:24px;height:24px;fill:currentColor}
.opc-ptc-abwrap{display:flex;flex-direction:column;gap:2px}
.opc-ptc-ablabel{font-size:13px;font-weight:700;color:#cbd5e1}
.opc-ptc-time{margin-left:auto;font-variant-numeric:tabular-nums;color:#e2e8f0;font-size:16px;font-weight:600;padding-bottom:12px}
.opc-ptc-looprow{display:flex;flex-wrap:wrap;gap:6px 8px;margin-top:10px}

/* segmented controls */
.opc-ptc-seg{display:inline-flex;flex-wrap:wrap;border-radius:12px;padding:3px;gap:3px;background:#e8f0fb}
.opc-ptc-seg button{min-height:44px;padding:0 14px;border:0;border-radius:9px;background:transparent;color:var(--a-navy);font-weight:700;font-size:15px;white-space:nowrap}
.opc-ptc-seg button:hover,.opc-ptc-seg button:focus{background:#d7e6fb;color:var(--a-navy)}
.opc-ptc-seg button[aria-checked=true]{background:var(--a-blue);color:#fff}
.opc-ptc-seg button[aria-checked=true]::before{content:"● ";font-size:.8em}
.opc-ptc-ab{background:var(--a-navy2)}
.opc-ptc-ab button{color:#e2e8f0}
.opc-ptc-ab button:hover,.opc-ptc-ab button:focus{background:#334155;color:#fff}
.opc-ptc-ab button[aria-checked=true]{background:var(--a-cyan);color:var(--a-navy)}
.opc-ptc-ab button[data-pt-ab=a][aria-checked=true]{background:#fff;color:var(--a-navy)}

/* ---------- panels ---------- */
.opc-ptc-mixer{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;margin-top:12px}
.opc-ptc-card{border:1px solid var(--a-line);border-radius:16px;background:#fff;padding:14px}
.opc-ptc-h3{margin:0 0 6px;font-size:17px;line-height:1.3;font-weight:800;color:var(--a-navy)}
.opc-ptc-label{display:block;font-size:15px;font-weight:700;color:var(--a-navy);margin:12px 0 4px}
.opc-ptc-unit{font-weight:600;color:var(--a-muted)}
.opc-ptc-hint{display:block;margin:4px 0 0;font-size:15px;line-height:1.45;color:var(--a-muted)}
.opc-ptc-readout{margin:0 0 4px;padding:10px 12px;border-radius:12px;background:var(--a-light);font-size:15px;color:var(--a-text)}
.opc-ptc-readout strong{display:block;font-size:26px;line-height:1.2;color:var(--a-navy);font-variant-numeric:tabular-nums}
.opc-ptc-readout strong[data-kind=same]{font-size:19px;color:var(--a-muted)}
.opc-ptc-readout span{display:block;margin-top:2px}
.opc-ptc-presets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-top:10px}
.opc-ptc-pre{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:48px;padding:4px 2px;border-radius:10px;border:1px solid #94a3b8;background:#fff;color:var(--a-navy);font-size:17px}
.opc-ptc-pre span{font-size:13px;font-weight:700;color:var(--a-muted);line-height:1.15}
.opc-ptc-pre b{font-weight:800}
.opc-ptc-pre:hover,.opc-ptc-pre:focus{background:var(--a-light);color:var(--a-navy)}
.opc-ptc-pre[aria-pressed=true]{background:var(--a-blue);border-color:var(--a-blue2);color:#fff}
.opc-ptc-pre[aria-pressed=true] span{color:#fff}
.opc-ptc-stepper{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.opc-ptc-step{display:inline-grid;place-items:center;min-width:52px;height:48px;padding:0 10px;border-radius:12px;border:1px solid #94a3b8;background:#fff;color:var(--a-navy);font-size:18px;font-weight:800}
.opc-ptc-step:hover,.opc-ptc-step:focus{background:var(--a-light);color:var(--a-navy)}
.opc-ptc .opc-ptc-num{width:78px;max-width:78px;flex:0 0 78px;height:48px;min-height:48px;margin:0;border:1px solid #94a3b8;border-radius:12px;text-align:center;font-size:21px;font-weight:800;color:var(--a-navy);background:#fff;padding:0 4px;-moz-appearance:textfield}
.opc-ptc .opc-ptc-range input{display:block;width:100%;height:44px;min-height:44px;accent-color:var(--a-blue);margin:4px 0 0;padding:0;border:0;background:transparent}
.opc-ptc-range{display:block;margin:0}
.opc-ptc-range output{font-weight:800;color:var(--a-blue2)}
.opc-ptc-keep{margin-top:12px;font-size:15px;color:var(--a-ok);font-weight:700}
.opc-ptc-keep::before{content:"✓ "}

/* more options (collapsed) */
.opc-ptc-more{margin-top:12px;border:1px solid var(--a-line);border-radius:16px;background:#fff}
.opc-ptc-more summary{display:flex;align-items:center;flex-wrap:wrap;gap:2px 10px;min-height:52px;padding:8px 16px;cursor:pointer;font-size:17px;font-weight:800;color:var(--a-navy);list-style:none}
.opc-ptc-more summary::-webkit-details-marker{display:none}
.opc-ptc-more summary::before{content:"+";display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--a-light);color:var(--a-blue2);font-weight:800}
.opc-ptc-more[open] summary::before{content:"−"}
.opc-ptc-more summary span{font-size:15px;font-weight:600;color:var(--a-muted)}
.opc-ptc-more summary:hover{background:var(--a-light);border-radius:16px}
.opc-ptc-moregrid{display:grid;grid-template-columns:minmax(0,1fr);gap:4px 20px;padding:0 16px 16px}
.opc-ptc-moregrid .opc-ptc-label{margin-top:10px}
.opc-ptc-more .opc-ptc-tbtn{color:var(--a-navy);border-color:#94a3b8}
.opc-ptc-more .opc-ptc-tbtn:hover,.opc-ptc-more .opc-ptc-tbtn:focus{background:var(--a-light);color:var(--a-navy)}
.opc-ptc-more .opc-ptc-tbtn[aria-pressed=true]{background:var(--a-cyan);border-color:var(--a-cyan);color:var(--a-navy)}
.opc-ptc-more .opc-ptc-tbtn:disabled{color:#64748b;border-color:#cbd5e1;background:#fff}

/* export */
.opc-ptc-field{display:flex;flex-direction:column;gap:4px;margin:12px 0 0;font-size:15px;color:var(--a-navy);font-weight:700}
.opc-ptc .opc-ptc-field select{min-height:44px;height:auto;width:100%;max-width:100%;border:1px solid #94a3b8;border-radius:10px;background:#fff;color:var(--a-navy);padding:0 10px;font-size:16px;font-weight:600}
.opc-ptc-dl{margin-top:4px;display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:52px;padding:0 18px;border:0;border-radius:12px;background:var(--a-blue);color:#fff;font-weight:800;font-size:17.5px}
.opc-ptc-dl:hover,.opc-ptc-dl:focus{background:var(--a-blue2);color:#fff}
.opc-ptc-dl:disabled{background:#cbd5e1;color:#334155}
.opc-ptc-dl svg{width:22px;height:22px}
.opc-ptc-dlinfo{margin-top:8px;font-size:15px;color:var(--a-text);overflow-wrap:anywhere;min-height:2.9em}
.opc-ptc-dlinfo b{color:var(--a-navy)}
.opc-ptc-savewrap{margin-top:8px}
.opc-ptc-save{display:inline-flex;align-items:center;min-height:44px;font-weight:700;color:var(--a-blue2);overflow-wrap:anywhere}

/* ---------- pitch + tempo mixer (two faders and the link switch) ---------- */
.opc-ptc-h3{display:flex;align-items:center;gap:8px}
.opc-ptc-dot{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--a-navy);color:var(--a-cyan);font-size:16px}
.opc-ptc-speed .opc-ptc-dot{background:var(--a-blue);color:#fff}
.opc-ptc .opc-ptc-slider{display:block;width:100%;height:44px;min-height:44px;margin:6px 0 0;padding:0;border:0;background:transparent;accent-color:var(--a-blue)}
.opc-ptc-scale{display:flex;justify-content:space-between;font-size:13px;font-weight:700;color:var(--a-muted);margin-top:-4px}
.opc-ptc .opc-ptc-wide{width:96px;max-width:96px;flex:0 0 96px;font-size:20px}
.opc-ptc-pct{font-size:18px;font-weight:800;color:var(--a-navy);margin-left:-4px}
.opc-ptc-pre{min-height:44px;font-size:16px;font-weight:800}
.opc-ptc-bpm{display:flex;align-items:flex-end;gap:8px;margin-top:12px}
.opc-ptc-bpm .opc-ptc-field{flex:1 1 0;min-width:0;margin:0}
.opc-ptc .opc-ptc-field input{min-height:44px;height:44px;width:100%;border:1px solid #94a3b8;border-radius:10px;background:#fff;color:var(--a-navy);padding:0 10px;font-size:18px;font-weight:700;margin:0}
.opc-ptc-arrow{padding-bottom:10px;font-size:20px;font-weight:800;color:var(--a-blue2)}
.opc-ptc-link{display:flex;flex-direction:column;align-items:stretch;gap:6px}
.opc-ptc-linkbtn{display:flex;align-items:center;gap:10px;width:100%;min-height:56px;padding:8px 14px;border-radius:14px;border:2px dashed #94a3b8;background:#fff;color:var(--a-navy);text-align:left}
.opc-ptc-linkbtn svg{flex:0 0 28px;width:28px;height:28px;color:var(--a-muted)}
.opc-ptc-linkbtn>span{display:flex;flex-direction:column;font-size:16px;line-height:1.25}
.opc-ptc-linkstate{font-size:15px;font-weight:700;color:var(--a-muted)}
.opc-ptc-linkbtn:hover,.opc-ptc-linkbtn:focus{background:var(--a-light);color:var(--a-navy)}
.opc-ptc-linkbtn[aria-checked=true]{border-style:solid;border-color:var(--a-blue2);background:var(--a-blue);color:#fff}
.opc-ptc-linkbtn[aria-checked=true] svg,.opc-ptc-linkbtn[aria-checked=true] .opc-ptc-linkstate{color:#fff}
.opc-ptc-link .opc-ptc-hint{margin:0}
.opc-ptc.is-linked .opc-ptc-card.opc-ptc-pitch,.opc-ptc.is-linked .opc-ptc-card.opc-ptc-speed{border-color:var(--a-blue);box-shadow:0 0 0 1px var(--a-blue) inset}
.opc-ptc-export{margin-top:12px}
.opc-ptc-exrow{display:flex;flex-direction:column;gap:8px}
.opc-ptc-exinfo{min-width:0;flex:1 1 auto}
.opc-ptc-exinfo .opc-ptc-dlinfo{margin-top:0}
.opc-ptc-reset{margin-top:8px;min-height:44px;padding:0 14px;border-radius:10px;border:1px solid #94a3b8;background:#fff;color:var(--a-navy);font-weight:700;font-size:15px}
.opc-ptc-reset:hover,.opc-ptc-reset:focus{background:var(--a-light);color:var(--a-navy)}
.opc-ptc-detect{margin-top:-4px}

/* ---------- calculator ---------- */
.opc-ptc-calc{max-width:1040px;margin:0 auto 1.75em;padding:16px;border:1px solid var(--a-line);border-radius:18px;background:var(--a-light);color:var(--a-text);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;box-sizing:border-box;text-align:left;
	--a-blue:#0067ff;--a-blue2:#0052cc;--a-cyan:#22b8f0;--a-navy:#0f172a;--a-text:#334155;--a-muted:#475569;--a-light:#f0f7ff;--a-line:#d6e4f5}
.opc-ptc-calc *{box-sizing:border-box}
.opc-ptc-calc h2,.opc-ptc-calc p{margin:0}
.opc-ptc-calc .opc-ptc-title{margin:0;font-size:22px;line-height:1.25;font-weight:800;color:var(--a-navy)}
.opc-ptc-calc .opc-ptc-lead{margin:4px 0 12px;color:var(--a-muted);font-size:16px}
.opc-ptc-calcgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.opc-ptc-calc .opc-ptc-field{display:flex;flex-direction:column;gap:4px;margin:0;font-size:15px;font-weight:700;color:var(--a-navy)}
.opc-ptc-calc .opc-ptc-field input{min-height:48px;height:48px;width:100%;border:1px solid #94a3b8;border-radius:10px;background:#fff;color:var(--a-navy);padding:0 10px;font:700 19px/1 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;margin:0}
.opc-ptc-calc :focus-visible{outline:3px solid var(--a-blue);outline-offset:2px}
.opc-ptc-calcout{margin-top:12px!important;padding:10px 12px;border-radius:12px;background:#fff;border:1px solid var(--a-line);font-size:16px;color:var(--a-text)}
.opc-ptc-calcout strong{display:block;font-size:20px;line-height:1.3;color:var(--a-navy)}
.opc-ptc-formula{margin-top:8px!important;font-size:15px;color:var(--a-muted)}
.opc-ptc-calcbtns{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.opc-ptc-apply{min-height:48px;padding:0 16px;border-radius:12px;border:0;background:var(--a-blue);color:#fff;font:800 16px/1.2 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;cursor:pointer}
.opc-ptc-apply:hover,.opc-ptc-apply:focus{background:var(--a-blue2);color:#fff}
.opc-ptc-apply2{background:#fff;color:var(--a-blue2);border:2px solid var(--a-blue)}
.opc-ptc-apply2:hover,.opc-ptc-apply2:focus{background:#e3efff;color:var(--a-blue2)}
.opc-ptc-apply:disabled{background:#cbd5e1;color:#334155;border-color:#cbd5e1;cursor:not-allowed}
.opc-ptc-calc .opc-ptc-hint{display:block;margin:6px 0 0;font-size:15px;color:var(--a-muted)}
.opc-ptc-tablewrap{overflow-x:auto;margin-top:14px;-webkit-overflow-scrolling:touch}
.opc-ptc-table{width:100%;min-width:420px;border-collapse:collapse;background:#fff;font-size:15px;line-height:1.35;font-variant-numeric:tabular-nums;margin:0}
.opc-ptc-table caption{caption-side:top;text-align:left;font-weight:800;color:var(--a-navy);padding:0 0 6px;font-size:16px}
.opc-ptc-table th,.opc-ptc-table td{padding:6px 10px;border:1px solid var(--a-line);text-align:right}
.opc-ptc-table thead th{background:var(--a-navy);color:#fff;text-align:right}
.opc-ptc-table tbody th{color:var(--a-navy);background:#f7fafd}
.opc-ptc-table tr.is-zero td,.opc-ptc-table tr.is-zero th{background:#e3efff;font-weight:700}
.opc-ptc-table tr.is-hit td,.opc-ptc-table tr.is-hit th{background:#fff3c4}

@media (min-width:600px){
	.opc-ptc-presets{grid-template-columns:repeat(6,minmax(0,1fr))}
	.opc-ptc-moregrid{grid-template-columns:repeat(2,minmax(0,1fr))}
	.opc-ptc-exrow{flex-direction:row;align-items:flex-start;gap:14px}
	.opc-ptc-exrow .opc-ptc-dl{width:auto;flex:0 0 auto;min-width:240px}
	.opc-ptc-calcgrid{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (min-width:880px){
	.opc-ptc-title{font-size:28px}
	.opc-ptc-deck{padding:16px}
	.opc-ptc-wave{height:150px}
	.opc-ptc-mixer{grid-template-columns:minmax(0,1fr) 150px minmax(0,1fr);gap:14px;align-items:stretch}
	.opc-ptc-presets{grid-template-columns:repeat(3,minmax(0,1fr))}
	.opc-ptc-link{justify-content:center;text-align:center}
	.opc-ptc-linkbtn{flex-direction:column;text-align:center;padding:14px 8px}
	.opc-ptc-linkbtn>span{align-items:center}
	.opc-ptc-card{padding:18px}
	.opc-ptc-moregrid{grid-template-columns:repeat(3,minmax(0,1fr))}
	.opc-ptc-calc{padding:20px}
	.opc-ptc-calc .opc-ptc-title{font-size:26px}
}
@media (prefers-reduced-motion:reduce){.opc-ptc *{transition:none!important;animation:none!important}}