[hidden]{display:none!important}.header nav a[aria-current]{color:var(--orange)}.book-page{padding-top:52px;padding-bottom:80px;min-height:75vh}.book-heading{display:flex;align-items:flex-end;justify-content:space-between;border-bottom:1px solid var(--ink);padding-bottom:32px;margin-bottom:40px;gap:24px}.book-heading .eyebrow{margin-bottom:16px}.book-heading h1{font-size:90px;line-height:1;margin:0;letter-spacing:-5px}.book-heading h1 span{color:var(--orange)}.book-heading>p{font-size:14px;line-height:1.9;margin:0}.book-heading>p span{color:var(--muted);font-size:11px}.book-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:64px}.contents{align-self:start;position:sticky;top:24px;max-height:calc(100vh - 48px);overflow:auto;padding-right:10px}.contents>.eyebrow{color:var(--muted);font-size:10px;margin-bottom:16px}.contents nav{display:grid;gap:2px}.chapter-link{display:grid;grid-template-columns:25px minmax(0,1fr);gap:9px;padding:11px 9px;font-size:12px;line-height:1.5;border-left:2px solid transparent}.chapter-link span{color:var(--muted);font-size:10px;padding-top:2px}.chapter-link:hover{background:#eae9df}.chapter-link[aria-current]{background:#eae9df;border-color:var(--orange);color:var(--orange)}.reading{min-width:0}.chapter-heading .eyebrow{color:var(--orange);margin-bottom:8px;font-size:10px}.chapter-heading h2{font-size:32px;letter-spacing:-1px;line-height:1.25;margin-bottom:28px}.exercise-picker{display:flex;gap:16px;align-items:center;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}label{font-size:12px}select{font:inherit;color:var(--ink);border:1px solid var(--line);background:#fffdf6;padding:9px;min-height:42px;max-width:100%;border-radius:0}select:focus-visible,input:focus-visible{outline:2px solid var(--orange);outline-offset:3px}.exercise-picker label{flex:none;color:var(--muted)}.exercise-picker select{flex:1;min-width:0;font-size:13px}.exercise-heading{margin:34px 0 24px}.exercise-heading .eyebrow{font-size:10px;color:var(--muted);margin-bottom:10px}.exercise-heading h3{font-size:25px;font-weight:500;letter-spacing:-.6px;line-height:1.4;margin:0;display:block}.player{background:#e8ecdf;padding:20px 22px;margin-bottom:24px}.player-top{display:flex;justify-content:space-between;gap:10px;font-size:10px;letter-spacing:1px;color:#4f594b;margin-bottom:10px}audio{display:block;width:100%;height:44px}.audio-options{display:flex;align-items:center;gap:24px;margin-top:10px;flex-wrap:wrap}.audio-options label{display:flex;align-items:center;gap:7px;font-size:11px;min-height:32px;cursor:pointer}.audio-options select{font-size:11px;min-height:32px;padding:4px;background:transparent;border-color:#bec8b3}.audio-options input{accent-color:var(--orange);width:16px;height:16px;margin:0}#audio-status{font-size:13px;color:#5d6255;margin:14px 0 4px}#examples{list-style:none;padding:0;margin:0;counter-reset:example}#examples li{counter-increment:example;display:grid;grid-template-columns:28px minmax(0,1fr);gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}#examples li:before{content:counter(example,decimal-leading-zero);font:10px 'DM Sans',sans-serif;color:#777e70;padding-top:9px}#examples p{font-family:Georgia,'Times New Roman',serif;font-size:25px;line-height:1.65;margin:0;word-break:normal;overflow-wrap:anywhere}#examples strong{font-weight:700;color:var(--orange)}#examples li.paragraph p{font-size:23px;line-height:1.9}.page-turn{display:flex;justify-content:space-between;gap:20px;margin-top:34px}.page-turn button{padding:13px 0;background:none;border:0;border-bottom:1px solid var(--ink);font-size:12px;cursor:pointer}.page-turn button:hover{color:var(--orange)}.page-turn button:disabled{color:#aaa;border-color:var(--line);cursor:default}.mobile-chapter{display:none}#load-status{padding:30px 0;color:var(--muted);font-size:14px}
@media(max-width:1050px){.book-layout{grid-template-columns:200px minmax(0,1fr);gap:32px}.chapter-heading h2{font-size:28px}}
@media(max-width:760px){.book-page{padding-top:30px;padding-bottom:50px}.book-heading{margin-bottom:26px;padding-bottom:25px;align-items:flex-start;flex-direction:column;gap:18px}.book-heading h1{font-size:67px;letter-spacing:-3px}.book-heading>p{font-size:12px}.book-heading>p br{display:none}.book-heading>p span{margin-left:10px;font-size:10px}.book-layout{display:block}.contents{display:none}.mobile-chapter{display:flex;align-items:center;gap:15px;margin-bottom:28px}.mobile-chapter label{flex:none;color:var(--muted)}.mobile-chapter select{min-width:0;width:100%;font-size:12px}.chapter-heading h2{font-size:27px;margin-bottom:22px}.exercise-heading h3{font-size:22px}.exercise-picker{gap:10px}.exercise-picker select{font-size:11px}.player{padding:16px 12px}.audio-options{gap:15px}#examples li{gap:10px;grid-template-columns:22px minmax(0,1fr);padding:18px 0}#examples p{font-size:22px}#examples li.paragraph p{font-size:21px;line-height:1.8}.exercise-heading{margin-top:27px}.header nav{justify-content:flex-start;gap:26px}}

.track-library{margin-bottom:40px}.track-library h2{font-size:22px;margin:0 0 10px}.track-library>p{font-size:13px;line-height:1.7}.track-library .audio-options{margin:14px 0}.track-library audio{max-width:720px}