:root{--paper:#f5f3eb;--ink:#243a31;--muted:#68766d;--line:#d6d9cc;--green:#234d40;--orange:#bb623e;--white:#fffef9;color:var(--ink);background:var(--paper);font-synthesis:none;font-family:Yu Gothic,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;font-size:15px;line-height:1.8}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}::selection{background:#dfc5a4}svg{max-width:100%;height:auto}h1,h2,h3,h4,p,figure{margin:0}h1,h2,h3,h4{letter-spacing:-.035em;font-weight:700;line-height:1.55}p{line-height:1.95}.wrap{max-width:1220px;margin-inline:auto;padding-inline:48px}.skip-link{background:var(--green);color:#fff;z-index:100;padding:10px 20px;position:absolute;top:-80px;left:16px}.skip-link:focus{top:10px}.site-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;min-height:105px;display:flex}.brand{white-space:nowrap;align-items:center;gap:13px;font-size:13px;font-weight:700;display:flex}.brand b{letter-spacing:-.06em;margin-left:5px;font-size:18px}.brand-symbol{align-items:center;gap:4px;width:29px;height:35px;display:flex}.brand-symbol i{background:var(--green);border-radius:4px;width:4px;height:15px}.brand-symbol i:nth-child(2){height:27px}.brand-symbol i:nth-child(3){height:35px}.brand-symbol i:nth-child(4){height:22px}.site-header nav{align-items:center;gap:29px;font-size:11px;font-weight:700;display:flex}.site-header nav a{border-bottom:1px solid #0000;padding:9px 0}.site-header nav a:hover,.site-header nav a[aria-current=page]{border-bottom-color:var(--green)}.eyebrow{letter-spacing:.13em;color:var(--muted);font-size:10px;font-weight:700;line-height:1.7}.small-dot,.score-dot{background:var(--orange);border-radius:50%;width:6px;height:6px;margin-right:7px;display:inline-block}.hero{grid-template-columns:1fr 1fr;align-items:center;gap:48px;padding-top:77px;padding-bottom:74px;display:grid}.hero h1{letter-spacing:-.065em;margin:26px 0 23px;font-size:clamp(44px,5.3vw,70px);line-height:1.45}.hero h1 span{color:var(--orange)}.hero-description{color:#5a685f;font-size:13px;line-height:2.25}.hero-actions{flex-wrap:wrap;align-items:center;gap:25px;margin-top:29px;display:flex}.button{background:var(--green);border:1px solid var(--green);color:#fffdf5;border-radius:3px;justify-content:space-between;align-items:center;gap:22px;min-height:52px;padding:12px 23px;font-size:12px;font-weight:700;line-height:1.8;display:inline-flex}.button:hover{background:#386350}.button span{font-size:18px;font-weight:400}.text-link{border-bottom:1px solid #a8b3a5;padding-bottom:3px;font-size:12px;font-weight:700}.text-link:hover{color:var(--orange);border-color:var(--orange)}.hero-footnote{color:var(--muted);margin-top:17px;font-size:10px}.score{background:#e4e9dd;border:1px solid #d1d9c9;border-radius:4px;padding:24px 21px 21px;position:relative;transform:rotate(-2deg)}.score:after{content:"";background:#e8dec5bd;width:64px;height:24px;display:block;position:absolute;top:-11px;right:19px;transform:rotate(24deg)}.score-label{color:#4e6756;letter-spacing:.08em;justify-content:space-between;padding:0 8px 17px;font-size:9px;display:flex}.score svg{width:100%;display:block}.score-axis{fill:#5e7764;font-size:10px}.score-chord{fill:#294c3a;font-size:20px;font-weight:700}.score figcaption{color:#5a715e;text-align:center;margin-top:20px;font-size:9px}.score-dot{background:#3c6b4b;width:5px;height:5px}.principles{border-top:1px solid var(--line);border-bottom:1px solid var(--line);justify-content:space-between;padding-block:23px;font-size:11px;display:flex}.principles b{color:#a69a7c;margin-right:14px;font-family:Georgia,serif;font-size:18px;font-weight:400}.curriculum{padding-top:86px;padding-bottom:80px}.section-heading{justify-content:space-between;align-items:end;gap:40px;margin-bottom:43px;display:flex}.section-heading h2{margin-top:12px;font-size:30px}.section-heading>p{color:var(--muted);font-size:11px}.chapter{border-top:1px solid var(--line);grid-template-columns:245px 1fr;gap:45px;padding:32px 0 35px;display:grid}.chapter:last-child{border-bottom:1px solid var(--line)}.chapter-intro{padding-top:12px}.chapter-number{color:#a69a7c;font-family:Georgia,serif;font-size:36px;line-height:1}.chapter-intro h3{margin:15px 0 12px;font-size:23px}.chapter-intro p{color:var(--muted);max-width:200px;font-size:11px}.chapter-range{color:#8b917f;letter-spacing:.1em;margin-top:24px;font-size:9px;display:block}.lesson-row{border-bottom:1px solid var(--line);align-items:center;gap:20px;padding:21px 0;transition:color .15s;display:flex}.lesson-row:last-child{border:0}.lesson-row:hover{color:var(--orange)}.lesson-number{color:#8c9787;align-self:flex-start;min-width:28px;font-family:Georgia,serif;font-size:18px}.lesson-row h4,.lesson-row h2{letter-spacing:-.02em;font-size:14px;line-height:1.7}.lesson-row p{color:var(--muted);margin-top:4px;font-size:10px}.row-arrow{color:#899681;margin-left:auto;padding-left:10px;font-size:19px}.lab-invitation{background:var(--green);color:#f8f5e9;border-radius:4px;grid-template-columns:1fr 1fr;gap:80px;padding-block:55px;display:grid}.lab-invitation .eyebrow{color:#bcb}.lab-invitation h2{margin:17px 0;font-size:34px}.lab-invitation p{color:#cbd8ca;font-size:12px}.button-light{color:var(--green);background:#f0ecd9;border-color:#f0ecd9;margin-top:28px}.button-light:hover{background:#e5dcbf}.chord-art{align-self:center}.chord-art-label{letter-spacing:.2em;color:#bcb;font-size:10px}.chord-art>div{flex-direction:column;gap:15px;max-width:330px;margin-top:27px;display:flex}.chord-art i{color:#294e3b;background:#b8cdb0;border-radius:4px;justify-content:space-between;align-items:center;padding:7px 20px;font-size:16px;font-style:normal;line-height:1.5;display:flex}.chord-art i:nth-child(2){background:#d3bb86}.chord-art i:nth-child(3){background:#db986d}.chord-art i span{font-family:Georgia,serif;font-size:20px}.chord-art p{margin-top:23px;font-size:10px}.closing{text-align:center;padding-top:95px;padding-bottom:97px}.closing h2{margin:17px 0 22px;font-size:28px}.closing>p:not(.eyebrow){color:var(--muted);margin-bottom:25px;font-size:12px}.site-footer{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:40px;padding-top:43px;display:grid}.footer-brand{font-size:15px;font-weight:700}.site-footer p{color:var(--muted);margin-top:13px;font-size:10px}.footer-links{grid-template-columns:1fr 1fr;align-content:start;gap:12px;font-size:10px;display:grid}.footer-links a:hover{text-decoration:underline}.footer-bottom{border-top:1px solid var(--line);color:#7b8578;grid-column:1/-1;justify-content:space-between;gap:20px;padding:20px 0;font-size:9px;display:flex}.page-heading{padding-top:65px;padding-bottom:55px}.page-heading h1{margin:18px 0 23px;font-size:43px}.page-heading>p:not(.eyebrow){color:var(--muted);font-size:12px}.all-lessons{padding-bottom:75px}.all-lessons .lesson-row{gap:27px;padding:26px 0}.all-lessons .lesson-row h2{margin:6px 0;font-size:20px}.all-lessons .lesson-row p{font-size:12px}.all-lessons .lesson-number{font-size:28px}.lesson-layout{grid-template-columns:230px minmax(0,1fr);gap:57px;padding-top:45px;padding-bottom:65px;display:grid}.lesson-sidebar{font-size:11px}.lesson-sidebar>a{margin:10px 0 28px;display:block}.lesson-sidebar ol{margin:0;padding:0;list-style:none}.lesson-sidebar li{border-bottom:1px solid var(--line)}.lesson-sidebar li a{color:#6e7e70;gap:12px;padding:13px 8px;line-height:1.7;display:flex}.lesson-sidebar li span{letter-spacing:.06em;color:#8a927e;font-family:Georgia,serif}.lesson-sidebar li a[aria-current=page]{color:var(--green);border-left:2px solid var(--green);background:#e6eadf;font-weight:700}.lesson-heading h1{margin:13px 0 18px;font-size:34px;line-height:1.65}.lesson-heading>p:not(.eyebrow){color:var(--muted);font-size:13px}.lesson-meta{color:#77816f;flex-wrap:wrap;gap:13px;margin-top:24px;font-size:9px;display:flex}.lesson-meta span+span{border-left:1px solid #c4cbbc;padding-left:13px}.studio-callout{background:#e9ecdf;border-left:3px solid #8da280;justify-content:space-between;align-items:center;gap:20px;margin-top:29px;padding:19px 22px;display:flex}.studio-callout p{font-size:11px;line-height:1.8}.button-small{white-space:nowrap;min-height:40px;padding:9px 16px;font-size:10px}.contents{border-bottom:1px solid var(--line);padding:18px 0;font-size:11px}.contents summary{cursor:pointer;font-weight:700}.contents a{border-bottom:1px solid #c2cabb}.contents ol{line-height:2.2}.lesson-diagram{background:#eceee3;border:1px solid #d7dfcc;border-radius:4px;margin:30px 0;padding:22px 25px}.lesson-diagram .eyebrow{font-size:9px}.lesson-diagram figcaption{color:#6b7d66;margin-top:18px;font-size:10px}.beat-diagram{gap:9px;margin-top:25px;display:grid}.beat-row{grid-template-columns:55px repeat(16,minmax(0,1fr));align-items:center;gap:4px;display:grid}.beat-row b{font-size:9px;font-weight:400}.beat-row i{aspect-ratio:1;background:#dce2d4;border:1px solid #d2d9c7;border-radius:2px;max-height:22px;display:block}.beat-row i.downbeat{border-left:2px solid #96a98c}.beat-row i.on{background:#d29862;border-color:#c89366}.beat-row:nth-child(2) i.on{background:#8da99b}.beat-row:nth-child(3) i.on{background:#b6b892}.note-diagram{margin:25px 0 15px}.note-diagram>div{border-bottom:1px solid #c9d4c1;align-items:center;gap:20px;padding:7px 0;display:flex;position:relative}.note-diagram span{color:#65785f;width:55px;font-size:11px}.note-diagram i{background:var(--note-color);width:30%;height:23px;margin-left:var(--note-offset);border-radius:3px;display:block}.wave-diagram{background:repeating-linear-gradient(90deg,#0000,#0000 calc(25% - 1px),#c1ccba calc(25% - 1px) 25%);justify-content:space-between;align-items:center;gap:3px;height:94px;margin-top:25px;display:flex}.wave-diagram i{height:var(--wave-height);background:#73917c;border-radius:1px;flex:1;min-width:0}.wave-label{color:#6b7d66;justify-content:space-between;margin-top:10px;font-size:9px;display:flex}.prose{overflow-wrap:anywhere;font-size:13px;line-height:2.05}.prose h1{font-size:42px;line-height:1.6}.prose h2{margin:43px 0 20px;padding-top:10px;scroll-margin-top:20px;font-size:24px}.prose h3{margin:28px 0 12px;font-size:18px}.prose p{margin:16px 0}.prose li{margin:10px 0}.prose ol,.prose ul{padding-left:24px}.prose a{text-underline-offset:3px;color:#315f48;text-decoration:underline}.prose a.button{color:#fff;text-decoration:none}.prose strong{font-weight:700}.prose blockquote{color:#556c50;background:#e9ecdf;border-left:3px solid #b89560;margin:25px 0;padding:9px 22px}.prose table{border-collapse:collapse;width:100%;margin:22px 0;font-size:11px;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);text-align:left;min-width:70px;padding:11px 15px}.prose th{background:#e6eadd}.prose pre{background:#e7ecdf;border-radius:3px;padding:18px;font-size:11px;line-height:1.9;overflow-x:auto}.prose code{background:#e9ecdf;padding:2px 5px;font-size:.9em}.prose pre code{padding:0}.prose hr{border:0;border-top:1px solid var(--line);margin:35px 0}.lesson-footnote{color:#63765d;background:#e9ecdf;margin:37px 0;padding:20px;font-size:10px;line-height:1.9}.lesson-footnote p{margin-top:8px}.lesson-footnote a{text-decoration:underline}.lesson-pagination{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:20px;padding-top:28px;display:grid}.lesson-pagination a{border:1px solid var(--line);background:#f8f7ef;padding:17px 19px}.lesson-pagination a:hover{border-color:var(--green)}.lesson-pagination small{color:#77816f;margin-bottom:8px;font-size:9px;display:block}.lesson-pagination span{font-size:11px;font-weight:700;line-height:1.8;display:block}.document-page{max-width:850px;padding-top:65px;padding-bottom:90px}.document-page h1{margin-top:16px;font-size:39px}.document-page .lead{color:var(--muted);margin:28px 0 45px;font-size:16px}.lab-page{max-width:1050px;padding-top:58px;padding-bottom:70px}.lab-page>h1{margin:15px 0;font-size:38px}.lab-page>.intro{color:var(--muted);max-width:650px;font-size:13px}.lab-page .chord-lab{margin-top:35px}.verification-note{background:#efe8d8;border-left:3px solid #bd7d50;margin:24px 0;padding:13px 18px;font-size:11px}.verification-note a{text-decoration:underline}@media (width>=1500px){.hero{padding-top:95px;padding-bottom:95px}}@media (width<=1000px){.wrap{padding-inline:30px}.site-header{gap:15px}.brand{gap:8px;font-size:11px}.brand b{font-size:15px}.site-header nav{gap:17px;font-size:10px}.hero{gap:25px}.hero h1{font-size:51px}.hero-description{font-size:12px}.hero-actions{gap:18px}.hero-actions .button{padding-inline:18px;font-size:11px}.chapter{grid-template-columns:200px 1fr;gap:20px}.lesson-layout{grid-template-columns:190px minmax(0,1fr);gap:30px}.lab-invitation{gap:35px}.lesson-heading h1{font-size:29px}.studio-callout{gap:12px;padding:15px}}@media (width<=720px){:root{font-size:14px}.wrap{padding-inline:22px}.site-header{flex-wrap:wrap;gap:0;min-height:100px;padding-block:18px}.brand{font-size:11px}.brand b{font-size:16px}.brand-symbol{height:28px}.site-header nav{gap:25px;width:100%;margin-top:15px;font-size:10px}.hero{grid-template-columns:1fr;gap:43px;padding-top:43px;padding-bottom:40px}.hero h1{margin:21px 0;font-size:53px}.hero-description{font-size:12px}.hero-actions{gap:23px}.hero-actions .button{padding-inline:21px;font-size:11px}.hero-footnote{font-size:9px}.score{max-width:520px;margin:0 3px 9px;padding:18px 15px;transform:rotate(-1deg)}.score-label{font-size:8px}.score figcaption{margin-top:10px;font-size:8px}.principles{gap:10px;padding-block:17px;font-size:9px}.principles b{margin:0 0 3px;font-size:17px;display:block}.curriculum{padding-top:51px;padding-bottom:45px}.section-heading{margin-bottom:24px;display:block}.section-heading h2{font-size:25px}.section-heading>p{margin-top:18px;font-size:10px}.chapter{padding-top:23px;padding-bottom:15px;display:block}.chapter-intro{grid-template-columns:44px 1fr;column-gap:10px;padding-top:0;display:grid;position:relative}.chapter-number{grid-row:1/3;align-self:start;padding-top:5px;font-size:27px}.chapter-intro h3{margin:0;font-size:20px}.chapter-intro p{grid-column:2;max-width:none;margin:6px 0 15px;font-size:10px}.chapter-range{display:none}.lesson-row{gap:12px;padding:18px 0}.lesson-row h4{font-size:13px}.lesson-row p{font-size:10px;line-height:1.8}.lesson-number{min-width:23px;font-size:16px}.lab-invitation{margin-inline:15px;padding:33px 24px;display:block}.lab-invitation h2{font-size:29px}.lab-invitation p{font-size:11px}.chord-art{max-width:340px;margin-top:40px}.chord-art>div{gap:10px;margin-top:16px}.chord-art i{padding:5px 18px;font-size:14px}.chord-art i span{font-size:17px}.closing{padding-block:55px}.closing h2{font-size:22px}.closing>p:not(.eyebrow){font-size:11px}.site-footer{grid-template-columns:1fr;gap:27px;padding-top:30px}.footer-brand{font-size:14px}.footer-links{gap:13px;font-size:10px}.footer-bottom{flex-direction:column;gap:7px;padding-top:17px;font-size:8px}.page-heading{padding-block:40px}.page-heading h1{font-size:34px}.page-heading>p:not(.eyebrow){font-size:11px}.all-lessons .lesson-row{gap:16px;padding:23px 0}.all-lessons .lesson-row h2{font-size:17px}.all-lessons .lesson-row p{font-size:11px}.all-lessons .lesson-number{font-size:23px}.lesson-layout{padding-top:22px;padding-bottom:40px;display:block}.lesson-sidebar{margin-bottom:25px}.lesson-sidebar ol{display:none}.lesson-sidebar>a{margin:0;font-size:10px;display:inline-block}.lesson-heading h1{margin-top:12px;font-size:27px}.lesson-heading>p:not(.eyebrow){font-size:12px}.lesson-meta{gap:10px;margin-top:20px;font-size:8px}.studio-callout{padding:17px;display:block}.studio-callout p{margin-bottom:13px;font-size:11px}.prose{font-size:13px}.prose h2{margin-top:32px;font-size:22px}.prose h3{font-size:17px}.prose table{font-size:10px}.prose td,.prose th{padding:8px 10px}.lesson-diagram{padding:18px 14px}.beat-row{grid-template-columns:42px repeat(16,minmax(0,1fr));gap:2px}.beat-row b{font-size:8px}.lesson-diagram figcaption{font-size:9px}.wave-label{font-size:8px}.lesson-pagination{gap:10px;padding-top:21px}.lesson-pagination a{padding:13px}.lesson-pagination span{font-size:10px}.document-page{padding-top:40px;padding-bottom:55px}.document-page h1{font-size:31px}.document-page .lead{margin-bottom:30px;font-size:14px}.lab-page{padding-top:35px;padding-bottom:45px}.lab-page>h1{font-size:30px}.lab-page>.intro{font-size:12px}.verification-note{font-size:10px}.contents{font-size:11px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.quick-task{margin:24px 0}.quick-task h2,.short-mission h2{margin-bottom:10px;font-size:16px}.quick-task ol{margin:0;padding-left:24px;font-size:12px;line-height:1.9}.quick-task li{margin:7px 0}.legacy-widget{margin:28px 0}.widget-caption{justify-content:space-between;align-items:center;gap:15px;display:flex}.widget-caption h2{letter-spacing:0;font-size:18px}.widget-caption a{font-size:10px;text-decoration:underline}.legacy-widget>p{color:var(--muted);margin:8px 0 14px;font-size:12px}.widget-scroll{overscroll-behavior-x:contain;border:1px solid var(--line);background:#fff;border-radius:6px;max-width:100%;overflow-x:auto}.lesson-widget{border:0;width:100%;min-height:220px;display:block}.track-widget{min-width:720px}.short-mission{background:#e9ecdf;border-left:3px solid #8da280;margin:24px 0;padding:18px 22px}.short-mission p{font-size:13px}.lesson-deep{border-top:1px solid var(--line);padding:17px 0;font-size:12px}.lesson-deep>summary{cursor:pointer;font-weight:700}.lesson-deep[open]>summary{margin-bottom:20px}.lesson-deep p{margin-top:12px}.verification-details{color:var(--muted);font-size:10px}.widget-links{flex-wrap:wrap;gap:12px;margin:20px 0 28px;display:flex}.widget-links a{border:1px solid var(--line);background:var(--white);border-radius:4px;padding:10px 15px;font-size:12px}.widget-links a:hover{border-color:var(--green)}.curriculum .lesson-row p{display:none}.hero-description{max-width:360px}.closing{padding-block:40px}.hero{padding-top:45px;padding-bottom:45px}.curriculum{padding-top:45px}.lab-invitation{display:none}.picture-guide{margin-top:32px}.picture-step{margin:35px 0}.picture-step header{align-items:center;gap:14px;display:flex}.picture-step header>span{background:var(--green);color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;font-size:12px;display:inline-grid}.picture-step h2{font-size:18px}.picture-step p{margin:14px 0;font-size:12px;line-height:1.9}.step-image{border:1px solid var(--line);background:#1b2326;border-radius:5px;display:block;overflow:hidden}.step-image img{width:100%;height:auto;display:block}.step-image.dashboard img{object-fit:cover;object-position:top;height:280px}.step-image.welcome{max-width:440px}.step-image.instrument img{object-fit:contain;max-height:580px}.image-expand{color:var(--muted);margin-top:7px;font-size:10px;text-decoration:underline;display:inline-block}