/* Scale Changer 1.0.0 | onlinepitchchanger.com | brand: #0067FF primary, #22B8F0 accent, #0F172A navy.
   Harmonium-style scale picker: black keys (Kali 1–5) on the top row, white keys (Safed 1–7) below, each key names its scale.
   Readability: sizes in px (themes such as Astra shrink rem), help text ≥ 15px, labels ≥ 13px; all text ≥ 4.5:1 contrast. */
.opc-scl{--s-blue:#0067ff;--s-blue2:#0052cc;--s-cyan:#22b8f0;--s-navy:#0f172a;--s-navy2:#1e293b;--s-text:#334155;--s-muted:#475569;--s-light:#f0f7ff;--s-line:#d6e4f5;--s-ok:#15803d;--s-err:#b91c1c;
	max-width:1040px;margin:0 auto 1.75em;color:var(--s-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-scl *,.opc-scl *::before,.opc-scl *::after{box-sizing:border-box}
.opc-scl [hidden]{display:none!important}
.opc-scl p,.opc-scl h2,.opc-scl h3{margin:0}
.opc-scl button,.opc-scl select,.opc-scl input{font:inherit;letter-spacing:normal;text-transform:none;box-shadow:none;margin:0}
.opc-scl button{cursor:pointer;line-height:1.2}
.opc-scl button:disabled{cursor:not-allowed}
.opc-scl :focus-visible{outline:3px solid var(--s-blue);outline-offset:2px}
.opc-scl-head{margin:0 0 12px}
.opc-scl-title{margin:0;font-size:24px;line-height:1.25;font-weight:800;color:var(--s-navy);letter-spacing:-.01em}
.opc-scl-lead{margin:4px 0 0;color:var(--s-muted);font-size:16px}
.opc-scl-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}
.opc-scl-label{display:block;font-size:15px;font-weight:700;color:var(--s-navy);margin:0 0 4px}
.opc-scl-unit{font-weight:600;color:var(--s-muted)}
.opc-scl-hint{display:block;margin:6px 0 0;font-size:15px;line-height:1.45;color:var(--s-muted)}
.opc-scl-stepno{display:inline-block;margin-right:6px;padding:2px 8px;border-radius:99px;background:var(--s-navy);color:#fff;font-size:13px;font-weight:800;vertical-align:2px}

/* Step 1: drop zone */
.opc-scl-drop{position:relative;border:2px dashed #9cc3f5;border-radius:16px;background:var(--s-light);padding:12px}
.opc-scl.is-drag .opc-scl-drop{border-color:var(--s-blue);background:#e3efff}
.opc-scl-file{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;clip:rect(0 0 0 0)}
.opc-scl-droplabel{display:flex;align-items:center;gap:14px;min-height:92px;padding:12px 14px;border-radius:12px;background:var(--s-blue);color:#fff;cursor:pointer;margin:0}
.opc-scl-droplabel:hover{background:var(--s-blue2)}
.opc-scl-file:focus-visible+.opc-scl-droplabel{outline:3px solid var(--s-navy);outline-offset:3px}
.opc-scl-dropicon{flex:0 0 40px;width:40px;height:40px;color:#fff}
.opc-scl-droptext{display:flex;flex-direction:column;align-items:flex-start;gap:2px;min-width:0}
.opc-scl-droplabel .opc-scl-stepno{background:#fff;color:var(--s-blue2)}
.opc-scl-droptext strong{font-size:20px;line-height:1.25;color:#fff}
.opc-scl-dropsub{font-size:15px;color:#fff;line-height:1.4}
.opc-scl-droprow{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 12px;margin-top:8px}
.opc-scl-private{display:inline-flex;align-items:flex-start;gap:6px;font-size:15px;color:var(--s-muted)}
.opc-scl-private svg{width:16px;height:16px;color:var(--s-ok);flex:0 0 16px;margin-top:3px}
.opc-scl-linkbtn{min-height:44px;padding:0 4px;border:0;background:none;color:var(--s-blue2);font-weight:700;font-size:16px;text-decoration:underline;text-underline-offset:3px;text-align:left}
.opc-scl-linkbtn:hover,.opc-scl-linkbtn:focus{background:none;color:var(--s-navy)}
.opc-scl-bar{height:8px;border-radius:99px;background:#dbe7f7;overflow:hidden;margin-top:8px}
.opc-scl-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--s-blue),var(--s-cyan));transition:width .2s}
.opc-scl-bar.is-busy span{width:35%!important;animation:opc-scl-slide 1.2s linear infinite}
@keyframes opc-scl-slide{from{transform:translateX(-100%)}to{transform:translateX(300%)}}
.opc-scl-status{margin-top:6px;font-size:15px;color:var(--s-navy);min-height:2.9em}
.opc-scl-status[data-kind=busy]{font-weight:600}
.opc-scl-status[data-kind=ok]{color:var(--s-ok);font-weight:600}
.opc-scl-status[data-kind=ok]::before{content:"✓ "}
.opc-scl-status[data-kind=error]{color:var(--s-err);font-weight:700}
.opc-scl-status[data-kind=error]::before{content:"⚠ "}
.opc-scl.is-loaded .opc-scl-droplabel{min-height:60px;padding:8px 12px;background:#fff;color:var(--s-blue2);border:1px solid #9cc3f5}
.opc-scl.is-loaded .opc-scl-droplabel:hover{background:#e3efff}
.opc-scl.is-loaded .opc-scl-droptext strong{color:var(--s-navy);font-size:17px}
.opc-scl.is-loaded .opc-scl-dropsub,.opc-scl.is-loaded .opc-scl-droplabel .opc-scl-stepno{display:none}
.opc-scl.is-loaded .opc-scl-dropicon{width:28px;height:28px;flex-basis:28px;color:var(--s-blue)}

/* cards */
.opc-scl-card{border:1px solid var(--s-line);border-radius:16px;background:#fff;padding:14px}
.opc-scl-h3{margin:0 0 6px;font-size:17px;line-height:1.3;font-weight:800;color:var(--s-navy)}
.opc-scl-big{font-size:30px;line-height:1.15;font-weight:800;color:var(--s-navy)}
.opc-scl-big output{display:inline}
.opc-scl-big .opc-scl-bigh{color:var(--s-blue2)}
.opc-scl-big[data-kind=empty]{font-size:20px;color:var(--s-muted)}
.opc-scl-meta{margin:6px 0 10px;font-size:15px;color:var(--s-text);min-height:2.9em}
.opc-scl-meta b{color:var(--s-navy)}
.opc-scl-field{display:flex;flex-direction:column;gap:4px;margin:0;font-size:15px;color:var(--s-navy);font-weight:700}
.opc-scl .opc-scl-field select{min-height:44px;height:auto;width:100%;max-width:100%;border:1px solid #94a3b8;border-radius:10px;background:#fff;color:var(--s-navy);padding:0 10px;font-size:16px;font-weight:600}

/* Step 2: harmonium-style scale keys (grid of 14 half-columns: white keys span 2, black keys sit between them on the row above) */
.opc-scl-change{margin:2px 0 10px;font-size:16px;color:var(--s-text)}
.opc-scl-change strong{display:block;font-size:23px;line-height:1.2;color:var(--s-navy)}
.opc-scl-change strong[data-kind=same]{font-size:19px;color:var(--s-muted)}
.opc-scl-harm{display:grid;grid-template-columns:repeat(14,minmax(0,1fr));grid-template-rows:auto auto;gap:6px 0;padding:10px 8px 12px;border-radius:14px;background:var(--s-navy);user-select:none;-webkit-user-select:none}
.opc-scl-k{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:2px;min-width:0;min-height:96px;margin:0 2px;padding:6px 1px 8px;border:0;border-radius:4px 4px 10px 10px;font-weight:800;text-align:center}
.opc-scl-k.is-safed{grid-row:2;grid-column:span 2;background:#fff;color:var(--s-navy);min-height:104px}
.opc-scl-k.is-kali{grid-row:1;background:#334155;color:#fff;box-shadow:inset 0 0 0 1px #64748b}
.opc-scl-k[data-scl-pc="0"]{grid-column:1/3}
.opc-scl-k[data-scl-pc="1"]{grid-column:2/4}
.opc-scl-k[data-scl-pc="3"]{grid-column:4/6}
.opc-scl-k[data-scl-pc="6"]{grid-column:8/10}
.opc-scl-k[data-scl-pc="8"]{grid-column:10/12}
.opc-scl-k[data-scl-pc="10"]{grid-column:12/14}
.opc-scl-kh{font-size:13px;line-height:1.15;white-space:normal;overflow-wrap:anywhere}
.opc-scl-kn{font-size:18px;line-height:1.1}
.opc-scl-ks{font-size:14px;line-height:1.1;min-height:1.1em;color:var(--s-muted)}
.opc-scl-k.is-kali .opc-scl-ks{color:#e2e8f0}
@media (hover:hover){.opc-scl-k:hover{filter:brightness(.94)}.opc-scl-k.is-kali:hover{background:#475569;filter:none}.opc-scl-k[aria-checked=true]:hover{background:var(--s-blue2);filter:none}}
.opc-scl-k[aria-checked=true]{background:var(--s-blue);color:#fff;box-shadow:inset 0 0 0 2px #fff}
.opc-scl-k[aria-checked=true] .opc-scl-ks{color:#fff}
.opc-scl-k.is-orig{box-shadow:inset 0 -7px 0 var(--s-cyan)}
.opc-scl-k.is-orig[aria-checked=true]{box-shadow:inset 0 0 0 2px #fff,inset 0 -7px 0 var(--s-cyan)}
.opc-scl-k:focus-visible{outline:3px solid var(--s-cyan);outline-offset:1px}
.opc-scl-harm.is-off .opc-scl-ks{visibility:hidden}
.opc-scl-dirrow{margin:12px 0}
.opc-scl-seg{display:inline-flex;flex-wrap:wrap;border-radius:12px;padding:3px;gap:3px;background:#e8f0fb}
.opc-scl-seg button{min-height:44px;padding:0 14px;border:0;border-radius:9px;background:transparent;color:var(--s-navy);font-weight:700;font-size:15px;white-space:nowrap}
.opc-scl-seg button:hover,.opc-scl-seg button:focus{background:#d7e6fb;color:var(--s-navy)}
.opc-scl-seg button[aria-checked=true]{background:var(--s-blue);color:#fff}
.opc-scl-seg button[aria-checked=true]::before{content:"● ";font-size:.8em}
.opc-scl-tempo{font-size:15px;color:var(--s-ok);font-weight:700}
.opc-scl-tempo::before{content:"✓ "}

/* player */
.opc-scl-player{border-radius:16px;background:var(--s-navy);padding:12px;color:#fff}
.opc-scl-now{min-height:1.5em;margin:0 0 8px;font-size:16px;font-weight:700;color:#fff}
.opc-scl-now b{color:var(--s-cyan)}
.opc-scl-now[data-which=a] b{color:#fff;text-decoration:underline;text-underline-offset:3px}
.opc-scl-wave{position:relative;height:96px;border-radius:10px;background:#0b1224;overflow:hidden;cursor:pointer;touch-action:pan-y;box-shadow:inset 0 0 0 1px #334155}
.opc-scl-wave canvas{display:block;width:100%;height:100%}
.opc-scl-wave:focus-visible{outline:3px solid var(--s-cyan);outline-offset:2px}
.opc-scl-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-scl-transport{display:flex;align-items:flex-end;flex-wrap:wrap;gap:10px 14px;margin-top:10px}
.opc-scl-play{display:inline-flex;align-items:center;gap:8px;min-height:52px;padding:0 20px 0 14px;border-radius:99px;border:0;background:var(--s-blue);color:#fff;font-weight:800;font-size:17px}
.opc-scl-play:hover,.opc-scl-play:focus{background:var(--s-blue2);color:#fff}
.opc-scl-play:disabled{background:#334155;color:#cbd5e1}
.opc-scl-play svg{width:24px;height:24px;fill:currentColor}
.opc-scl-play:focus-visible{outline-color:var(--s-cyan)}
.opc-scl-abwrap{display:flex;flex-direction:column;gap:2px}
.opc-scl-ablabel{font-size:13px;font-weight:700;color:#cbd5e1}
.opc-scl-ab{background:#1e293b}
.opc-scl-ab button{color:#e2e8f0}
.opc-scl-ab button:hover,.opc-scl-ab button:focus{background:#334155;color:#fff}
.opc-scl-ab button[aria-checked=true]{background:var(--s-cyan);color:var(--s-navy)}
.opc-scl-ab button[data-scl-ab=a][aria-checked=true]{background:#fff;color:var(--s-navy)}
.opc-scl-ab button:focus-visible{outline-color:var(--s-cyan)}
.opc-scl-time{margin-left:auto;font-variant-numeric:tabular-nums;color:#e2e8f0;font-size:16px;font-weight:600;padding-bottom:12px}

/* Step 3: export */
.opc-scl-dl{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(--s-blue);color:#fff;font-weight:800;font-size:17.5px}
.opc-scl-dl:hover,.opc-scl-dl:focus{background:var(--s-blue2);color:#fff}
.opc-scl-dl:disabled{background:#cbd5e1;color:#334155}
.opc-scl-dl svg{width:22px;height:22px}
.opc-scl-dlinfo{margin-top:8px;font-size:15px;color:var(--s-text);overflow-wrap:anywhere;min-height:2.9em}
.opc-scl-dlinfo b{color:var(--s-navy)}
.opc-scl-savewrap{margin-top:8px}
.opc-scl-save{display:inline-flex;align-items:center;min-height:44px;font-weight:700;color:var(--s-blue2);overflow-wrap:anywhere}

/* More options */
.opc-scl-more{border:1px solid var(--s-line);border-radius:16px;background:#fff}
.opc-scl-more summary{display:flex;align-items:center;flex-wrap:wrap;gap:0 6px;min-height:52px;padding:0 14px;cursor:pointer;font-weight:800;font-size:16px;color:var(--s-navy)}
.opc-scl-more summary .opc-scl-unit{font-size:15px}
.opc-scl-moreb{padding:0 14px 14px}
.opc-scl-range{display:block;margin:0 0 10px}
.opc-scl-range output{font-weight:800;color:var(--s-blue2)}
.opc-scl .opc-scl-range input{display:block;width:100%;height:44px;min-height:44px;accent-color:var(--s-blue);margin:0;padding:0;border:0;background:transparent}
.opc-scl-tune{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;padding:8px 10px;border-radius:12px;background:#fff7ed;color:#7c2d12;font-size:15px;margin-bottom:10px}
.opc-scl-sbtn{min-height:44px;padding:0 12px;border-radius:10px;border:1px solid #c2410c;background:transparent;color:#7c2d12;font-weight:700;font-size:15px}
.opc-scl-sbtn:hover,.opc-scl-sbtn:focus{background:#ffedd5;color:#7c2d12}
.opc-scl-check{display:flex;align-items:flex-start;gap:10px;min-height:44px;margin:0 0 12px;font-size:15px;color:var(--s-text);cursor:pointer}
.opc-scl-check b{color:var(--s-navy)}
.opc-scl .opc-scl-check input{flex:0 0 22px;width:22px;height:22px;margin:1px 0 0;accent-color:var(--s-blue)}

@media (min-width:600px){
	.opc-scl-k{min-height:100px}
	.opc-scl-k.is-safed{min-height:112px}
	.opc-scl-kh{font-size:14px}
	.opc-scl-kn{font-size:20px}
}
@media (min-width:880px){
	.opc-scl-title{font-size:28px}
	.opc-scl-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);grid-template-areas:"drop pick" "song pick" "player player" "export more";gap:14px}
	.opc-scl-drop{grid-area:drop}
	.opc-scl-song{grid-area:song}
	.opc-scl-pick{grid-area:pick}
	.opc-scl-player{grid-area:player}
	.opc-scl-export{grid-area:export;align-self:start}
	.opc-scl-more{grid-area:more;align-self:start}
	.opc-scl-wave{height:120px}
	.opc-scl-card{padding:18px}
	.opc-scl-big{font-size:34px}
}
@media (prefers-reduced-motion:reduce){.opc-scl *{transition:none!important;animation:none!important}}
/* narrow phones: the keyboard uses the full card width so every key stays ≥ 44 px wide */
@media (max-width:420px){
	.opc-scl-pick{padding-left:10px;padding-right:10px}
	.opc-scl-harm{margin:0 -8px;padding:8px 1px 10px}
	.opc-scl-k{margin:0 .5px}
}