: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,summary: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(0,1.35fr) minmax(300px,1fr);align-items:center;gap:36px;padding:0 0 36px}
.detector{min-width:0;text-align:center;display:grid;grid-template-columns:minmax(150px,1fr) minmax(220px,280px);grid-template-rows:auto 1fr auto auto 1fr;align-items:center;column-gap:6px}
.hero-copy{grid-column:1;grid-row:1;text-align:left;align-self:end;margin:0 0 24px 4px}.hero-copy h1{font-size:31px;line-height:1.12;letter-spacing:-1.2px;margin:0;color:#1d2b3f;font-weight:650}.hero-copy p{margin:8px 0 0;color:#7a8798;font-size:14px;line-height:1.5}
.readout{grid-column:1;grid-row:3;height:auto}.pitch-rail{grid-column:2;grid-row:1/6;height:min(700px,80svh);min-height:520px;width:100%;position:relative;overflow:hidden}
.pitch-strip,.note-scale{width:100%;height:100%;display:block}.note-scale{overflow:hidden}.needle{display:none!important}
.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}
.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}
.tuning-row{grid-column:1;grid-row:4;min-height:32px;color:#61748e;font-size:14px;font-variant-numeric:tabular-nums}.mic-area{grid-column:1;grid-row:5;align-self:start;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}.piano-toolbar 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:#fff}.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}

.ad-slot{grid-column:1 / -1;display:flex;justify-content:center;width:100%;min-width:0}.ad-slot-inner{width:min(100%,728px);min-height:90px;display:flex;align-items:center;justify-content:center;position:relative}.ad-label{position:absolute;top:0;font-size:10px;letter-spacing:.04em;text-transform:uppercase;color:#a0a8b4}@media(min-width:741px){.ad-slot{display:none}}

.content-area{border-top:1px solid #e7ebf1;padding:34px 0 0;margin-top:6px}.content-area h2{font-size:22px;letter-spacing:-.45px;color:#1d2b3f;margin:0 0 10px}.content-area p{color:#68768a;line-height:1.65;font-size:14px}.intro-block{max-width:650px;margin-bottom:28px}.intro-block p{margin:0}
.how-section{margin-top:12px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.step-card{border:1px solid #e2e7ef;border-radius:9px;padding:20px 20px 18px;display:flex;gap:15px;min-width:0;background:#fbfcfe}.step-number{width:38px;height:38px;border-radius:50%;background:#edf4ff;color:#2865cf;display:grid;place-items:center;flex:0 0 auto;font-size:14px;font-weight:650}.step-card h3{font-size:14px;margin:2px 0 7px;color:#26344a}.step-card p{font-size:12px;line-height:1.55;margin:0;color:#7a8798}
.faq-section{margin-top:26px}.faq-list{border:1px solid #e2e7ef;border-radius:8px;overflow:hidden;background:#fbfcfe}.faq-list details+details{border-top:1px solid #e6ebf2}.faq-list summary{list-style:none;cursor:pointer;padding:14px 16px;font-size:13px;font-weight:550;color:#2b3a50;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"⌄";position:absolute;right:16px;color:#718096}.faq-list details[open] summary:after{content:"⌃"}.faq-list details p{margin:0;padding:0 44px 15px 16px;font-size:13px;line-height:1.6}

footer{border-top:1px solid #e7ebf1;margin-top:28px;padding:18px 0 28px;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#8a95a4}footer nav{display:flex;gap:24px}footer a{color:#66758b;text-decoration:none}footer a:hover{text-decoration:underline}

.info-page{max-width:760px;margin:20px auto 80px}.info-page h1{font-size:36px;letter-spacing:-1.1px;margin:24px 0 14px;color:#1d2b3f}.info-page h2{font-size:20px;margin:30px 0 8px;color:#26344a}.info-page p{font-size:15px;line-height:1.75;color:#637188}.info-page a{color:#2865cf}.back-link{font-size:13px;color:#6d7a8c;text-decoration:none}

@media(min-width:1450px){.workspace{gap:60px}}
@media(max-width:950px) and (min-width:741px){.page{padding:0 30px}.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}.hero-copy h1{font-size:27px}.steps{gap:10px}.step-card{padding:16px}}
@media(max-width:740px){
.page{max-width:580px;padding:0 23px}header{height:76px}.brand{font-size:21px}.workspace{grid-template-columns:1fr;gap:24px;padding-top:0}.detector{grid-template-columns:minmax(130px,1fr) minmax(180px,240px);grid-template-rows:auto 1fr auto auto 1fr}.hero-copy{margin:2px 0 18px}.hero-copy h1{font-size:25px}.hero-copy p{font-size:13px}.pitch-rail{height:580px;min-height:0}.note{font-size:72px}.mic-area{margin-top:18px;gap:11px}.primary{min-width:0;padding:14px 18px;font-size:14px}.piano-panel{border-left:0;border-top:1px solid #e7ebf1;padding:24px 0 0}.keyboard{height:142px}.piano-toolbar{margin-bottom:15px}.reference-info{margin-top:12px}.ad-slot{display:flex;margin:2px 0 4px}.ad-slot-inner{min-height:100px;width:100%}.steps{grid-template-columns:1fr}.content-area{padding-top:28px}.content-area h2{font-size:20px}footer{align-items:flex-start;gap:16px;flex-direction:column}footer nav{gap:18px}.info-page{margin-top:10px}.info-page h1{font-size:30px}
}
@media(max-width:390px){.page{padding:0 14px}.detector{grid-template-columns:minmax(120px,1fr) 174px}.pitch-rail{height:530px}.note{font-size:60px}.primary{font-size:13px;padding:13px 10px}.hero-copy h1{font-size:22px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}