/* Piano Chord Library: a quiet, contemporary interface for a working music reference.
   Screen-only rules keep the established A4 and Letter layouts intact. */
.ui-icon{width:20px;height:20px;flex:none;vertical-align:middle}.mobile-menu{display:none}
@media screen{
.path-card{text-decoration:none;color:var(--ink)}.path-card:hover{border-color:#aab7ed;color:var(--ink)}.path-top{display:flex;flex-direction:column;gap:24px;margin-bottom:18px;color:var(--green)}.path-top>.ui-icon{width:30px;height:30px}.path-top>span{font-size:9px;font-weight:650;letter-spacing:.13em;color:var(--muted)}.path-link{font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;width:100%;color:var(--green)}.path-link .ui-icon{width:17px}.practice-note>div>.ui-icon{width:30px;height:30px;color:var(--green);margin-bottom:17px}
}

@media screen{
:root{--paper:#fff;--white:#fff;--ink:#20232c;--muted:#626675;--green:#334bd3;--light:#f0f3ff;--gold:#cbd5ff;--line:#e2e5ed;--serif:var(--sans)}
body{font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}a:hover{color:#2338b2}.wrap{width:min(1240px,calc(100% - 80px))}h1,h2,h3{font-family:var(--sans);font-weight:650;letter-spacing:-.045em;line-height:1.15}h1{font-size:clamp(40px,5.2vw,70px)}h2{font-size:clamp(29px,3.1vw,40px)}h3{font-size:25px}.lead{font-size:17px;line-height:1.8}.eyebrow{font-size:10px;letter-spacing:.16em;font-weight:700;margin-bottom:19px}.eyebrow:before{width:14px;height:3px}.site-header{background:#fff}.header-inner{min-height:88px}.brand{font-size:20px;font-weight:650;letter-spacing:-.04em}.brand img{height:36px;width:33px}.nav{gap:29px}.nav a{font-size:13px;font-weight:550}.nav a[aria-current]{color:var(--green)}.nav .nav-tool{display:flex;align-items:center;gap:16px;border-color:var(--line);border-radius:7px;padding:10px 15px}.nav .nav-tool:hover{background:var(--light);text-decoration:none}.nav-tool .ui-icon{width:17px}.button{border-radius:6px;font-size:13px;min-height:47px;padding:12px 20px;font-weight:600}.button:hover{background:#2338b2}.button.secondary{border-color:#d5dbea;color:var(--ink);background:#fff}.button.secondary:hover{background:#f4f6fc}.button.small{min-height:42px;font-size:12px}.text-link{display:inline-flex;gap:12px;align-items:center;font-size:13px;text-decoration:none}.text-link:hover{text-decoration:underline}.actions{gap:25px;margin:30px 0}.hero{grid-template-columns:1fr 1fr;gap:70px;padding:76px 0 62px;align-items:center}.hero h1{font-size:clamp(42px,4.7vw,64px);font-weight:650;letter-spacing:-.057em;line-height:1.08;margin-bottom:26px}.hero h1 span{color:var(--green)}.hero .lead{max-width:470px}.hero-note{display:flex;gap:20px;flex-wrap:wrap;margin-top:35px;font-size:10px}.hero-note span{display:inline-flex;align-items:center;gap:6px;margin:0}.hero-note span:before{content:none}.hero-note .ui-icon{width:15px;height:15px;color:var(--green)}
.feature-panel{padding:23px 25px 0;background:#f6f7fb;border:1px solid var(--line);color:var(--ink);border-radius:12px;box-shadow:0 16px 50px -34px #15255860;overflow:hidden}.panel-top{font-size:10px;letter-spacing:.025em;text-transform:none;color:var(--ink);margin-bottom:24px}.panel-top>span{display:flex;align-items:center;gap:8px}.panel-top a{color:var(--muted)}.live-dot{width:6px;height:6px;background:var(--green);border-radius:50%}.feature-panel .widget{background:transparent;padding:0}.feature-panel .eyebrow{display:none}.feature-panel .result-title{font-size:30px;font-weight:600}.feature-panel .note-list{font-family:var(--sans);font-size:22px;letter-spacing:.1em;color:var(--green);margin-top:8px}.feature-panel .formula,.feature-panel .fine,.feature-panel .audio-status{color:var(--muted);font-size:11px}.feature-panel .keyboard-box{background:transparent;margin:22px 0 13px}.feature-panel .controls{border-color:var(--line);gap:10px;margin-top:18px;padding-top:18px}.feature-panel .control{min-width:95px}.feature-panel label{color:var(--muted);font-size:10px}.feature-panel select{background:#fff;font-size:12px;padding:8px;min-height:40px}.feature-panel .button{background:var(--green);border-color:var(--green);color:#fff}.feature-panel .button.secondary{background:#fff;color:var(--ink);border-color:#d5dbea}.feature-panel .button:hover{background:#2338b2;color:#fff}.feature-panel .audio-status{margin-bottom:18px}.panel-caption{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding:15px 0;color:var(--muted);font-size:10px}.panel-caption span:first-child{letter-spacing:.12em;color:var(--green);font-weight:650}
.quick-find{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:23px 0 29px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.quick-find h2{font-size:15px;letter-spacing:-.015em;margin:0}.quick-find p{font-size:11px;color:var(--muted);margin:3px 0 0}.root-links{display:flex;gap:7px;flex-wrap:wrap;align-items:center}.root-links a{width:44px;height:43px;border:1px solid var(--line);border-bottom:3px solid #d8dce8;display:flex;align-items:center;justify-content:center;text-decoration:none;color:var(--ink);font-size:13px;border-radius:4px}.root-links a:hover{background:var(--light);border-color:var(--green);color:var(--green)}.root-links .all-roots{width:auto;border:0;gap:10px;padding-left:12px;font-size:11px}.section{padding:65px 0}.resources-section{border-top:0}.section-heading{margin-bottom:31px;align-items:end}.section-heading .eyebrow{margin-bottom:13px}.section-heading h2{max-width:600px;font-size:34px}.resource-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.path-card{border:1px solid var(--line);border-radius:9px;padding:28px;display:flex;flex-direction:column;align-items:start;background:#fff}.path-card>.ui-icon{width:31px;height:31px;color:var(--green);margin-bottom:30px}.path-label{font-size:9px;font-weight:600;letter-spacing:.14em;color:var(--muted);margin:0 0 12px}.path-card h3{font-size:24px;margin:0 0 14px}.path-card p:not(.path-label){font-size:13px;color:var(--muted);margin-bottom:30px}.path-card .text-link{margin-top:auto;font-size:12px}.path-print{background:var(--light);border-color:transparent}.grid{gap:20px}.resource-card{padding:25px;border-radius:8px;transition:background .18s,border-color .18s}.resource-card:hover{transform:none;background:#fafbff;border-color:#aab7ed;color:var(--ink)}.resource-card h3{font-size:26px;font-weight:600}.resource-card .tag{font-size:9px;margin-bottom:13px}.resource-card p{font-size:13px}.card-keyboard{margin:22px 0 0;padding:15px 7px 0;background:#f6f7fb;border-radius:5px}.card-keyboard .keyboard{max-height:100px}.card-keyboard .white-label,.card-keyboard .black-label{font-size:14px}.card-bottom{font-size:11px;margin-top:24px}.card-bottom .ui-icon{width:17px}.learn-section .resource-card{border-width:1px 0 0;border-radius:0;padding:26px 15px 0 0;background:#fff}.learn-section .resource-card h3{font-size:23px}.learn-section .resource-card .tag{color:var(--green)}.practice-note{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:30px;padding:38px;background:#f5f7fc;border-radius:9px;margin:5px 0 76px}.practice-note>.ui-icon{width:42px;height:42px;color:var(--green)}.practice-note .eyebrow{margin-bottom:9px}.practice-note h2{font-size:28px;margin:0 0 10px}.practice-note p:not(.eyebrow){color:var(--muted);font-size:13px;max-width:680px;margin:0}
.footer{background:#fafbfe;margin-top:60px;padding:52px 0 22px}.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}.footer .brand{font-size:19px}.footer-intro p{font-size:20px;line-height:1.5;letter-spacing:-.035em;margin:24px 0 13px;font-weight:500}.footer-intro>span{font-size:11px;color:var(--muted)}.footer-group{display:flex;flex-direction:column;gap:10px}.footer-group h2{font-family:var(--sans);font-size:10px;letter-spacing:.09em;text-transform:uppercase;margin:10px 0 12px;font-weight:650;color:var(--muted)}.footer-group a{font-size:12px;text-decoration:none;color:var(--ink)}.footer-group a:hover{text-decoration:underline}.footer-bottom{margin-top:42px;padding-top:22px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:25px}.footer-bottom p{font-size:10px;color:var(--muted);margin:0}.footer-links{font-size:11px;gap:20px}.footer-links .download{font-size:11px;color:var(--muted)}
.crumbs{padding-top:32px}.page-header{padding:16px 0 30px;max-width:870px}.page-header h1{font-size:clamp(36px,4.2vw,56px);font-weight:650}.page-header .lead{font-size:17px}.layout{grid-template-columns:minmax(0,1fr) 260px;gap:42px}.widget{border-radius:10px;padding:30px;background:#fff;box-shadow:0 8px 28px -25px #17213b50}.widget h2{font-size:33px;font-weight:600}.note-list{font-family:var(--sans);font-size:29px;letter-spacing:.09em}.keyboard-box{background:#f6f7fb;border-radius:7px}.white-key{fill:#fff;stroke:#9a9da9}.black-key{fill:#252934;stroke:#151721}.white-key.selected{fill:#dfe5ff;stroke:#334bd3}.black-key.selected{fill:#334bd3;stroke:#c8d3ff}.white-label{fill:#636775}.white-key.selected+circle+.white-label{fill:#243bb7}.key-dot{fill:#334bd3}select{border-color:#cdd3e1;border-radius:5px;font-size:13px}label{font-size:11px}.sidebar{background:#f6f7fb;border:0;border-radius:8px;padding:25px}.sidebar h2{font-size:11px}.sidebar ul{list-style:none;padding:0}.sidebar li{padding:11px 0;border-bottom:1px solid var(--line);margin:0;font-size:12px}.sidebar a{text-decoration:none}.sidebar p{font-size:11px;margin-top:20px}.article h2{font-size:29px;line-height:1.2}.article h3{font-size:22px}.note-box{border-left-width:2px;background:var(--light);border-radius:0 7px 7px 0}.practice{border:1px solid var(--line);background:#fafbfe;border-radius:7px}.practice h3{font-size:23px}.chart-table td:first-child{font-family:var(--sans)}.inversion-card{border-radius:7px}.inversion-card h3{font-size:12px}.contact-form input,.contact-form textarea{border-color:#cdd3e1}.consent-panel{border-color:var(--line);border-radius:10px;box-shadow:0 10px 50px #18233d20}.consent-panel strong{font-size:14px}.consent-panel p{font-size:12px}a:focus-visible,button:focus-visible,select:focus-visible,summary:focus-visible,.contact-form input:focus-visible,.contact-form textarea:focus-visible{outline:3px solid #647ced;outline-offset:4px}
@media(min-width:761px) and (max-width:1100px){.wrap{width:calc(100% - 48px)}.hero{gap:32px}.hero h1{font-size:46px}.nav{gap:18px}.hero-note{gap:11px}.feature-panel{padding:20px 20px 0}.root-links a{width:37px}.quick-find{gap:20px}.path-card{padding:23px}.layout{gap:26px;grid-template-columns:minmax(0,1fr) 230px}}
@media(max-width:900px){.nav{display:none}.header-inner{min-height:78px;display:flex;padding:0;position:relative}.mobile-menu{display:block;margin-left:auto}.mobile-menu summary{list-style:none;display:flex;align-items:center;gap:8px;cursor:pointer;font-size:12px;padding:9px 0 9px 12px}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu nav{position:absolute;top:70px;right:0;width:240px;z-index:20;padding:14px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 14px 32px #20232c14;display:flex;flex-direction:column}.mobile-menu nav a{padding:10px 12px;font-size:13px;text-decoration:none;color:var(--ink)}.mobile-menu nav .nav-tool{display:flex;align-items:center;justify-content:space-between;color:var(--green);border-top:1px solid var(--line);margin-top:5px}.quick-find{align-items:start;flex-direction:column;gap:18px}.practice-note{grid-template-columns:auto 1fr}.practice-note>.text-link{grid-column:2}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.hero{grid-template-columns:1fr;padding:47px 0 38px;gap:33px}.hero h1{font-size:clamp(39px,8vw,58px);max-width:610px}.hero .lead{font-size:15px;max-width:580px}.hero .actions{margin:24px 0;gap:22px}.hero-note{margin-top:24px;gap:18px;font-size:10px}.feature-panel{padding:21px 22px 0;box-shadow:none}.feature-panel .keyboard{max-height:210px}.feature-panel .control{min-width:0}.feature-panel .controls{flex-wrap:nowrap}.section{padding:42px 0}.section-heading{display:block;margin-bottom:23px}.section-heading h2{font-size:29px}.section-heading>.text-link{margin-top:20px}.resource-paths{grid-template-columns:1fr;gap:14px}.path-card{padding:24px;display:grid;grid-template-columns:40px 1fr;column-gap:15px}.path-card>.ui-icon{grid-column:1;grid-row:1/4;margin:0}.path-card>p,.path-card>h3,.path-card>.text-link{grid-column:2}.path-card h3{font-size:23px}.path-card p:not(.path-label){margin-bottom:20px}.path-label{font-size:9px;margin-bottom:9px}.resource-card{padding:22px}.resource-card h3{font-size:25px}.grid{grid-template-columns:1fr;gap:16px}.card-keyboard .keyboard{max-height:125px}.learn-section .grid{gap:25px}.practice-note{padding:25px;gap:20px;margin-bottom:45px}.practice-note>.ui-icon{width:27px;height:27px;align-self:start;margin-top:6px}.practice-note h2{font-size:25px}.footer{margin-top:30px;padding-top:35px}.footer-top{grid-template-columns:1fr 1fr;gap:32px}.footer-intro{grid-column:1/-1}.footer-intro p{font-size:22px;margin-top:20px}.footer-bottom{align-items:start;flex-direction:column;gap:16px}.footer-links{margin:0}.layout{grid-template-columns:1fr;gap:24px}.page-header{padding:6px 0 23px}.page-header h1{font-size:36px}.page-header .lead{font-size:15px}.widget{padding:23px}.sidebar{margin-top:0}.article h2{font-size:27px}.article h3{font-size:22px}.inversion-grid{grid-template-columns:1fr}.consent-actions .button{font-size:12px}}
@media(max-width:380px){.wrap{width:calc(100% - 32px)}.brand{font-size:18px}.brand img{width:28px;height:32px}.hero h1{font-size:37px}.hero-note{gap:10px;font-size:9px}.hero-note .ui-icon{width:13px}.feature-panel{padding:18px 16px 0}.feature-panel select{font-size:11px;padding:7px 3px}.panel-caption{font-size:9px}.root-links{gap:6px}.root-links a{width:38px}.root-links .all-roots{padding-left:6px}.practice-note{grid-template-columns:1fr}.practice-note>.ui-icon{display:none}.practice-note>.text-link{grid-column:1}.button{padding:11px 16px}.hero .actions{gap:17px}}
}
@media screen{.page-home #main>.ed-breadcrumbs{display:none}}
@media screen and (min-width:761px){
 .page-home .hero{padding:38px 0 45px;gap:55px}.page-home .feature-panel{padding:20px 24px 0}.page-home .panel-top{margin-bottom:16px}.page-home .feature-panel .keyboard{max-height:150px}.page-home .feature-panel .keyboard-box{margin:15px 0 12px}.page-home .feature-panel .widget>.fine{display:none}.page-home .feature-panel .controls{margin-top:15px;padding-top:14px}.page-home .feature-panel .audio-status{margin-bottom:12px}.page-home .panel-caption{padding:12px 0}.page-home .hero-note{margin-top:25px}
}
@media screen and (max-width:760px){
 .resource-paths .path-card{display:flex;flex-direction:column;align-items:stretch;padding:25px}.path-top{flex-direction:row;align-items:center;gap:13px;margin-bottom:20px}.path-top>.ui-icon{width:26px;height:26px}.resource-paths .path-card h3{font-size:24px}.path-link{margin-top:3px}.practice-note{display:flex;flex-direction:column;align-items:start;gap:22px}.practice-note>div>.ui-icon{margin-bottom:16px}.practice-note>p{max-width:none!important}.practice-note>.text-link{font-size:12px}.practice-note h2{max-width:320px}
}
@media screen and (max-width:420px){.header-inner{gap:12px}.header-inner .brand{font-size:17px;gap:9px}.header-inner .brand img{width:28px;height:32px}.mobile-menu summary{font-size:11px}}