:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#222a38;background:#fafbfc;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #3973df;outline-offset:5px}button:disabled{opacity:.3;cursor:not-allowed}
.page{max-width:1250px;margin:auto;padding:0 52px}header{height:100px;display:flex;align-items:center;justify-content:space-between}.brand{color:inherit;text-decoration:none;font-size:23px;font-weight:650;letter-spacing:-.9px}.brand span{color:#3973df}.calibration{font-size:13px;color:#7c8593}
.workspace{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);align-items:center;gap:62px;min-height:calc(100svh - 180px);padding:30px 0 80px}
.detector{min-width:0;text-align:center}.readout{height:148px}.note{font-size:94px;font-weight:500;line-height:1.15;letter-spacing:-5px;color:#2865cf;font-variant-numeric:tabular-nums}.note sub{font-size:32px;letter-spacing:0;vertical-align:baseline;margin-left:5px;color:#7288ab}.note.empty{color:#c9d2df}.frequency{font-size:14px;color:#7f8a9a;margin-top:8px;font-variant-numeric:tabular-nums}
/* Open, fixed musical ruler on the page itself. */
.detector{display:grid;grid-template-columns:minmax(140px,1fr) minmax(160px,220px);grid-template-rows:1fr auto auto 1fr;align-items:center;column-gap:10px}
.readout{grid-column:1;grid-row:2;height:auto}.pitch-rail{grid-column:2;grid-row:1/5;height:min(720px,78svh);min-height:520px;width:100%;position:relative}
.pitch-strip,.note-scale{width:100%;height:100%;display:block}.note-scale{overflow:visible}.scale-label{fill:#778598;font-size:15px;font-weight:450;font-family:inherit}.scale-label.active{fill:#2865cf;font-weight:750}.needle{display:none!important}.tuning-row{grid-column:1;grid-row:3;min-height:32px;color:#61748e;font-size:14px;font-variant-numeric:tabular-nums}.mic-area{grid-column:1;grid-row:4;align-self:start}
.mic-area{margin-top:30px;display:flex;flex-direction:column;align-items:center;gap:14px}.primary{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;background:#2865cf;color:#fff;padding:15px 26px;border-radius:30px;min-width:182px;font-weight:550;font-size:15px}.primary:hover{background:#1e55b9}.status{font-size:12px;color:#8b95a4;min-height:16px}.status.on{color:#4f75b6}#message{font-size:13px;line-height:1.5;color:#8a5860;max-width:380px;margin:0}#message:empty{display:none}
.piano-panel{min-width:0;border-left:1px solid #e7ebf1;padding-left:36px}.piano-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:8px}h2{font-weight:500;font-size:16px;margin:0}.octave-controls{display:flex;align-items:center;gap:9px;font-size:12px;color:#7c8796}.octave-controls button{border:1px solid #e2e7ef;border-radius:50%;height:29px;width:29px;background:transparent;color:#536177;font-size:19px}
.keyboard{height:164px;position:relative;display:flex;background:#26313f;border:1px solid #d4dce7;border-top:5px solid #303b4a;border-radius:6px 6px 8px 8px;overflow:hidden;isolation:isolate;touch-action:none}
.key{padding:0 0 12px;position:relative;border:0;border-right:1px solid #d4dce7;flex:1;border-radius:0 0 4px 4px;background:linear-gradient(#fff 85%,#f2f4f7);color:#8c96a4;display:flex;align-items:flex-end;justify-content:center;font-size:10px;user-select:none;touch-action:none}.key:last-child{border-right:0}.key.black{position:absolute;top:0;width:4.3%;height:61%;z-index:2;background:linear-gradient(#303a48,#19212d);box-shadow:0 3px 2px #0003;border:1px solid #111c2b;border-radius:0 0 4px 4px;color:transparent;padding-bottom:8px}.key.active{background:#d1e2ff;color:#245ebf}.key.black.active{background:#3470d5;color:white}.key:focus-visible{outline:2px solid #3973da;outline-offset:-3px;z-index:3}
.reference-info{margin-top:18px;display:flex;gap:12px;align-items:baseline;min-height:28px;color:#8b95a4;font-size:12px}.reference-info strong{font-size:19px;font-weight:500;color:#56729f}
@media(min-width:1450px){.workspace{gap:85px}}
@media(max-width:950px){.page{padding:0 30px}.workspace{gap:28px;grid-template-columns:minmax(0,1.3fr) minmax(280px,1fr)}.piano-panel{padding-left:24px}}
@media(max-width:740px){.page{max-width:580px;padding:0 23px}header{height:76px}.brand{font-size:21px}.workspace{grid-template-columns:1fr;gap:36px;padding:24px 0 36px;min-height:0}.readout{height:123px}.note{font-size:78px}.pitch-rail{height:126px;margin-top:2px}.rail-note{font-size:25px}.mic-area{margin-top:21px;gap:11px}.piano-panel{border-left:0;border-top:1px solid #e7ebf1;padding:26px 0 0}.keyboard{height:142px}.piano-toolbar{margin-bottom:15px}.reference-info{margin-top:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.workspace{padding:0 0 36px;gap:36px;grid-template-columns:minmax(0,1.35fr) minmax(300px,1fr)}
@media(max-width:740px){.workspace{grid-template-columns:1fr;gap:24px;padding-top:0}.detector{grid-template-columns:1fr minmax(160px,210px)}.pitch-rail{height:640px;min-height:560px;margin:0}.readout{height:auto}.note{font-size:70px}.mic-area{margin-top:18px}.primary{min-width:0;padding:14px 18px;font-size:14px}.piano-panel{padding-top:24px}.scale-label{font-size:14px}}
@media(max-width:390px){.page{padding:0 14px}.detector{grid-template-columns:1fr 150px}.note{font-size:60px}.primary{padding:13px 12px;gap:6px}.pitch-rail{height:600px}}
/* Zoomed scrolling ruler: about 19 semitones, with a stationary pitch marker. */
.detector{grid-template-columns:minmax(150px,1fr) minmax(220px,280px);column-gap:6px}
.pitch-rail{height:min(700px,80svh);min-height:520px;overflow:hidden}
.note-scale{overflow:hidden}
.scale-label{fill:#233653;font-size:25px;font-weight:550;font-family:inherit}
.scale-label.accidental{fill:#63738c;font-size:19px;font-weight:450}
.scale-label.active{fill:#2865cf;font-size:29px;font-weight:750}
@media(max-width:950px) and (min-width:741px){.workspace{grid-template-columns:minmax(0,1.5fr) minmax(250px,1fr);gap:20px}.piano-panel{padding-left:18px}.detector{grid-template-columns:minmax(140px,1fr) 210px}.primary{min-width:0;padding:14px 18px}}
@media(max-width:740px){.detector{grid-template-columns:minmax(130px,1fr) minmax(180px,240px)}.pitch-rail{height:580px;min-height:0}.note{font-size:72px}.scale-label{font-size:25px}}
@media(max-width:390px){.detector{grid-template-columns:minmax(120px,1fr) 174px}.pitch-rail{height:530px}.note{font-size:60px}.primary{font-size:13px;padding:13px 10px}}