:root{--book-paper:var(--gx-reader-paper);--book-ink:var(--gx-reader-ink);--book-muted:var(--gx-reader-muted);--book-line:var(--gx-reader-line);--book-accent:var(--gx-reader-accent);--book-surface:var(--gx-reader-surface)}
.skip-link{position:fixed;top:8px;left:8px;z-index:110;padding:.75rem 1rem;border-radius:var(--gx-radius-sm);background:var(--gx-acid);color:var(--gx-black);font-weight:700;transform:translateY(calc(-100% - 16px))}.skip-link:focus{transform:none;outline:3px solid var(--gx-white);outline-offset:2px}
.book-progress{position:fixed;top:0;left:0;right:0;z-index:95;height:3px;pointer-events:none}.book-progress span{display:block;width:0;height:100%;background:var(--gx-reader-accent);transition:width .12s linear}
.book-chapter[hidden]{display:none}.book-chapter--revealed{animation:book-chapter-enter .32s var(--gx-ease) both}@keyframes book-chapter-enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.book-chapter h2:focus{outline:1px solid rgb(165 82 64/.28);outline-offset:4px}.book-chapter h2:focus-visible{outline:2px solid var(--book-accent);outline-offset:5px}
.chapter-previous{display:inline-flex;align-items:center;gap:.5rem;min-height:44px;margin-bottom:1.2rem;color:var(--book-accent);font:.82rem/1.3 var(--gx-font-body);font-weight:700}.chapter-previous:hover{text-decoration:underline}.chapter-previous:focus-visible{outline:3px solid var(--book-accent);outline-offset:3px}
.book-cover{position:relative;display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--gx-border);background:var(--gx-black)}.book-cover[hidden]{display:none}
.book-cover-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:clamp(2rem,7vw,7rem);align-items:end;padding-block:24px 48px}
.book-cover-copy{max-width:920px}.book-eyebrow{display:flex;align-items:center;gap:.85rem;color:var(--gx-muted);font:.7rem/1.3 var(--gx-font-body);font-weight:700;letter-spacing:.12em;text-transform:uppercase}.book-volume{margin:clamp(1.6rem,3vw,2.5rem) 0 0;color:var(--gx-acid);font:.72rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.16em;text-transform:uppercase}.book-cover h1{margin:.3rem 0 0;font:700 clamp(5rem,16vw,14rem)/.88 var(--gx-font-display);letter-spacing:-.085em}.book-title-period{color:var(--gx-acid)}.book-cover-dek{max-width:620px;margin:1.3rem 0 1.7rem;color:var(--gx-white);font:500 clamp(1.15rem,2vw,1.55rem)/1.48 var(--gx-font-body)}.book-start{min-height:48px}.book-start:focus-visible,.chapter-next:focus-visible,.book-sidebar a:focus-visible,.book-mobile-index a:focus-visible{outline:3px solid var(--gx-acid);outline-offset:4px}
.book-cover-side{align-self:end;border-top:1px solid var(--gx-border-strong);padding-top:1.1rem;color:var(--gx-muted)}.book-cover-side>span{font:.7rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gx-acid)}.book-cover-side ol{margin:1.1rem 0 1.8rem;padding-left:1.4rem;font:500 .88rem/1.75 var(--gx-font-body)}.book-cover-side small{color:var(--gx-muted);font-size:.75rem}.book-cover-lettering{position:absolute;right:-.02em;bottom:-.18em;z-index:0;color:rgb(189 243 208/.045);font:700 clamp(8rem,21vw,24rem)/.9 var(--gx-font-display);letter-spacing:-.075em;white-space:nowrap;pointer-events:none}
.book-paper{background:var(--book-paper);color:var(--book-ink)}.book-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:clamp(2.5rem,7vw,7rem);align-items:start}.book-sidebar{position:sticky;top:calc(88px + 3rem);padding-block:5rem 3rem}.book-sidebar-label{display:block;margin-bottom:1.2rem;color:var(--book-accent);font:.72rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.13em;text-transform:uppercase}.book-sidebar nav{display:grid;gap:.2rem}.book-sidebar nav a{display:flex;gap:.7rem;align-items:baseline;padding:.55rem 0;border-left:2px solid transparent;color:var(--book-muted);font:.86rem/1.35 var(--gx-font-body);transition:color var(--gx-duration),border-color var(--gx-duration),padding-left var(--gx-duration)}.book-sidebar nav a b{font-size:.68rem;color:var(--book-muted)}.book-sidebar nav a:hover,.book-sidebar nav a.is-current{padding-left:.6rem;border-color:var(--book-accent);color:var(--book-ink)}.book-sidebar-home{display:inline-block;margin-top:2rem;color:var(--book-accent);font:.8rem/1.4 var(--gx-font-body);font-weight:700}.book-reader{min-width:0;max-width:820px}.book-mobile-index{display:none}.book-chapter{padding:clamp(4.5rem,8vw,7rem) 0;border-bottom:1px solid var(--book-line);scroll-margin-top:110px}.book-chapter:last-child{border:0}.chapter-kicker{margin-bottom:1.5rem;color:var(--book-accent);font:.72rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.13em;text-transform:uppercase}.book-chapter h2{max-width:14ch;margin:0 0 1.8rem;font:700 clamp(2.7rem,5.2vw,5.3rem)/1.04 var(--gx-font-display);letter-spacing:-.055em}.book-chapter>p{max-width:70ch;margin:0 0 1.3rem;color:var(--book-ink);font:400 clamp(1.05rem,1.3vw,1.18rem)/1.76 var(--gx-font-body)}.book-chapter>p strong{font-weight:700}.book-chapter .book-lede{font-size:clamp(1.25rem,2vw,1.55rem);line-height:1.58}.book-callout,.book-exercise{max-width:70ch;margin:2.5rem 0;padding:1.35rem 1.6rem;border-left:3px solid var(--book-accent);background:var(--gx-reader-surface-muted)}.book-callout span,.book-exercise span{display:block;margin-bottom:.35rem;color:var(--book-accent);font:.7rem/1.3 var(--gx-font-body);font-weight:700;letter-spacing:.11em;text-transform:uppercase}.book-callout p,.book-exercise p{margin:0;font:500 1rem/1.6 var(--gx-font-body)}.chapter-next{display:inline-flex;align-items:center;gap:1rem;min-height:44px;margin-top:2.5rem;border-bottom:1px solid var(--book-accent);color:var(--book-accent);font:.84rem/1.3 var(--gx-font-body);font-weight:700}.chapter-next i{transition:transform var(--gx-duration)}.chapter-next:hover i{transform:translate(3px,3px)}
.book-legend{display:flex;flex-wrap:wrap;gap:.7rem 1.3rem;margin:2rem 0;color:var(--book-muted);font:.77rem/1.4 var(--gx-font-body)}.book-legend span{display:inline-flex;align-items:center;gap:.4rem}.legend-dot{width:14px;height:14px;border-radius:50%;background:var(--book-ink)}.legend-root{background:var(--book-accent)}.legend-open,.legend-muted{font:700 1.25rem/1 var(--gx-font-body);color:var(--book-ink)}.book-diagram-feature{display:grid;grid-template-columns:minmax(160px,220px) 1fr;gap:2rem;align-items:center;margin:2rem 0 2.5rem;padding:clamp(1.2rem,3vw,2rem);border:1px solid var(--book-line);border-radius:var(--gx-radius-md);background:var(--book-surface)}.book-diagram-feature figcaption,.book-fretboard-figure figcaption{color:var(--book-muted);font:.9rem/1.58 var(--gx-font-body)}.book-diagram-feature figcaption strong{color:var(--book-ink)}.chord-diagram svg{display:block;width:100%;max-width:210px;margin:auto;overflow:visible}.chord-diagram svg text{font-family:var(--gx-font-body)}.chord-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(132px,1fr));gap:.8rem;margin:2.2rem 0}.chord-gallery figure{min-width:0;margin:0;padding:1rem .6rem .8rem;border:1px solid var(--book-line);border-radius:var(--gx-radius-sm);background:var(--book-surface)}.chord-gallery figcaption{margin-top:.4rem;color:var(--book-muted);font:.68rem/1.4 var(--gx-font-body);text-align:center}.chord-gallery--comparison{grid-template-columns:repeat(2,minmax(0,200px))}.chord-gallery--comparison figure{padding:1.2rem}
.book-fretboard-figure{margin:2rem 0 2.5rem}.book-fretboard-scroll{max-width:100%;overflow-x:auto;padding:.4rem 0 .9rem;scrollbar-color:var(--book-accent) var(--book-line)}.book-fretboard{display:grid;grid-template-columns:58px repeat(13,minmax(43px,1fr));min-width:680px;border-top:1px solid var(--book-line);border-left:1px solid var(--book-line);background:var(--book-surface)}.fret-cell{display:grid;place-items:center;min-height:42px;border-right:1px solid var(--book-line);border-bottom:1px solid var(--book-line);font:.72rem/1.2 var(--gx-font-body)}.fret-cell--head{min-height:32px;color:var(--book-muted);background:var(--gx-reader-surface-muted);font-weight:700}.fret-cell--string{color:var(--book-ink);font-weight:700}.fret-cell--root b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:var(--book-accent);color:var(--gx-white);font-size:.7rem}.book-fretboard-figure figcaption{margin-top:.65rem}
.book-original-figure{margin:2.2rem 0 2.7rem}.book-original-figure h3{margin:0 0 .9rem;color:var(--book-ink);font:700 1.15rem/1.3 var(--gx-font-display)}.book-original-scroll{max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-color:var(--book-accent) var(--book-line);-webkit-overflow-scrolling:touch}.book-original-scroll img{display:block;width:100%;min-width:620px;height:auto;background:var(--book-paper)}.book-original-figure figcaption{margin-top:.7rem;color:var(--book-muted);font:.87rem/1.55 var(--gx-font-body)}.book-original-figure--neck{text-align:center}.book-neck-stage{box-sizing:border-box;width:min(100%,520px);margin-inline:auto;padding:0 clamp(1rem,3vw,1.6rem);border-radius:var(--gx-radius-sm);background:var(--book-surface)}.book-original-figure--neck img{display:block;width:min(460px,100%);height:auto;margin-inline:auto}.book-original-figure--neck figcaption{max-width:42ch;margin-inline:auto} .book-mobile-hint{display:none} .book-original-figure--diagram .book-original-scroll{box-sizing:border-box;width:min(100%,520px);margin-inline:auto;padding:0 clamp(1rem,3vw,1.6rem);border-radius:var(--gx-radius-sm);background:var(--book-surface)}.book-original-figure--diagram .book-original-scroll img{width:min(100%,460px);min-width:0;margin-inline:auto;background:transparent}
.practice-list{list-style:none;display:grid;gap:0;max-width:70ch;margin:2rem 0 2.5rem;padding:0;border-top:1px solid var(--book-line)}.practice-list li{display:grid;grid-template-columns:78px 1fr;gap:1.4rem;padding:1.4rem 0;border-bottom:1px solid var(--book-line)}.practice-list li>span{color:var(--book-accent);font:.72rem/1.5 var(--gx-font-body);font-weight:700;letter-spacing:.08em;text-transform:uppercase}.practice-list h3{margin:0 0 .4rem;font:700 1.16rem/1.3 var(--gx-font-display)}.practice-list p{margin:0;font:400 1rem/1.58 var(--gx-font-body)}.book-endnote{margin:5rem 0 0;padding:2.5rem;border-radius:var(--gx-radius-md);background:var(--book-ink);color:var(--book-paper)}.book-endnote>span{font:.7rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--gx-acid)}.book-endnote h3{margin:1.2rem 0;font:700 clamp(1.8rem,3vw,2.8rem)/1.1 var(--gx-font-display);letter-spacing:-.04em}.book-endnote p{max-width:55ch;color:var(--gx-white);font:400 1rem/1.65 var(--gx-font-body)}.book-endnote a{display:inline-block;min-height:44px;margin-top:.5rem;padding-top:.5rem;color:var(--gx-acid);font:.82rem/1.3 var(--gx-font-body);font-weight:700}.book-footer{padding:2rem 0;background:var(--gx-black);border-top:1px solid var(--gx-border)}.book-footer .gx-container{display:flex;align-items:center;gap:2rem}.book-footer img{display:block;width:110px}.book-footer span{color:var(--gx-muted);font-size:.82rem}.book-footer a:last-child{margin-left:auto;color:var(--gx-acid);font-size:.82rem} .book-reference-list{list-style:none;display:grid;gap:0;max-width:70ch;margin:2.2rem 0 2.5rem;padding:0;border-top:1px solid var(--book-line)}.book-reference-list li{display:block;padding:1.4rem 0;border-bottom:1px solid var(--book-line)}.book-reference-list h3{margin:0 0 .4rem;font:700 1.16rem/1.3 var(--gx-font-display)}.book-reference-list p{margin:0;font:400 1rem/1.65 var(--gx-font-body)}
@media(max-width:1000px){.book-layout{grid-template-columns:175px minmax(0,1fr);gap:2.5rem}.book-cover-inner{grid-template-columns:minmax(0,1fr) 220px}}
@media(min-width:761px){.book-chapter:not(.book-intro){padding-top:5.25rem}}
@media(max-width:760px){.book-chapter:not(.book-intro){padding-top:1.5rem}}
@media(max-width:760px){.book-cover{min-height:620px}.book-cover-inner{grid-template-columns:1fr;padding-block:5rem 5.5rem}.book-cover-side{display:none}.book-cover h1{font-size:clamp(5rem,19vw,9rem)}.book-cover-dek{max-width:520px}.book-layout{display:block}.book-sidebar{display:none}.book-mobile-index{display:block;position:sticky;top:72px;z-index:5;margin-inline:-13px;border-bottom:1px solid var(--book-line);background:color-mix(in srgb,var(--gx-reader-surface-muted) 78%,var(--gx-reader-paper));box-shadow:0 4px 14px rgb(25 49 58/.05);backdrop-filter:blur(14px)}.book-mobile-index summary{display:flex;justify-content:space-between;align-items:center;min-height:50px;padding:0 13px;list-style:none;cursor:pointer;color:var(--book-ink);font:.78rem/1.2 var(--gx-font-body);font-weight:700;letter-spacing:.07em;text-transform:uppercase}.book-mobile-index summary::-webkit-details-marker{display:none}.book-mobile-index[open] summary i{transform:rotate(180deg)}.book-mobile-index nav{display:grid;padding:0 13px 1rem}.book-mobile-index nav a{padding:.65rem 0;border-top:1px solid var(--book-line);font:.9rem/1.3 var(--gx-font-body)}.book-chapter{scroll-margin-top:138px}}
@media(max-width:560px){.book-cover{min-height:calc(100svh - 72px)}.book-volume{margin-top:4rem}.book-cover h1{font-size:clamp(4.6rem,20vw,7rem)}.book-cover-dek{font-size:1.16rem}.book-cover-lettering{font-size:9rem;bottom:-.1em}.book-chapter{padding-block:4.4rem}.book-chapter h2{font-size:clamp(2.5rem,10vw,3.8rem)}.book-diagram-feature{grid-template-columns:1fr;gap:1rem}.book-diagram-feature .chord-diagram svg{max-width:180px}.chord-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.chord-gallery--comparison{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-list li{grid-template-columns:1fr;gap:.3rem}.book-endnote{margin-inline:-13px;padding:2rem 1.4rem;border-radius:0}.book-footer .gx-container{flex-wrap:wrap}.book-footer a:last-child{margin-left:0}}
@media(prefers-reduced-motion:reduce){.book-progress span,.chapter-next i,.book-start{transition:none}.book-chapter--revealed{animation:none}.book-start:hover,.chapter-next:hover i{transform:none}}
@media(max-width:760px){.book-mobile-index summary:focus-visible{outline:3px solid var(--book-accent);outline-offset:-3px}.book-index-chevron{display:grid;place-items:center;flex:none;width:24px;height:24px;color:inherit;transition:transform var(--gx-duration)}.book-index-chevron::before{content:"";display:block;width:7px;height:7px;margin-top:-3px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg)}.book-mobile-index[open] .book-index-chevron{transform:rotate(180deg)}}
@media(prefers-reduced-motion:reduce){.book-index-chevron{transition:none}}
.book-paper[hidden]{display:none}.book-cover{display:grid;grid-template-columns:minmax(0,47%) minmax(0,53%);align-items:stretch;min-height:100svh;overflow:visible;border:0}.book-cover-art{position:sticky;top:0;align-self:start;box-sizing:border-box;display:flex;align-items:center;min-height:100svh;padding:24px clamp(2rem,5vw,5rem) 48px;overflow:hidden;background:var(--gx-black)}.book-cover-art h1{font-size:clamp(4.4rem,8.5vw,9rem)}.book-cover-art .book-cover-dek{max-width:28ch}
.book-cover-opening{box-sizing:border-box;display:flex;flex-direction:column;justify-content:space-between;gap:clamp(3rem,6vw,6rem);min-height:100svh;padding:clamp(3rem,6vw,6rem);background:var(--book-paper);color:var(--book-ink)}.book-opening-copy{max-width:620px}.book-opening-copy h2{max-width:14ch;margin:1.8rem 0 1.5rem;font:700 clamp(2.4rem,4vw,4.6rem)/1.07 var(--gx-font-display);letter-spacing:-.055em}.book-opening-copy p{max-width:60ch;margin:0 0 1.15rem;font:400 clamp(1rem,1.3vw,1.17rem)/1.68 var(--gx-font-body)}.book-opening-copy .book-start{margin-top:1.2rem}.book-opening-meta{display:block;margin-top:1rem;color:var(--book-muted);font:.75rem/1.4 var(--gx-font-body)}.book-opening-index{display:grid;max-width:620px}.book-opening-index .book-sidebar-label{margin-bottom:.5rem}.book-opening-index a{display:flex;gap:1rem;align-items:baseline;min-height:44px;padding:.7rem 0;border-top:1px solid var(--book-line);color:var(--book-ink);font:600 .9rem/1.35 var(--gx-font-body);text-decoration:none;transition:padding-left var(--gx-duration),color var(--gx-duration)}.book-opening-index a b{min-width:2ch;color:var(--book-accent);font-size:.72rem}.book-opening-index a:hover{padding-left:.5rem;color:var(--book-accent)}.book-opening-index a:focus-visible{outline:3px solid var(--book-accent);outline-offset:2px}
.book-sidebar{top:3rem}.book-chapter{scroll-margin-top:36px}.book-float-toggle{position:fixed;right:max(20px,env(safe-area-inset-right));bottom:max(20px,env(safe-area-inset-bottom));z-index:81;display:grid;place-items:center;width:52px;height:52px;padding:0;border:1px solid var(--gx-border-strong);border-radius:50%;background:var(--gx-black);color:var(--gx-white);box-shadow:0 8px 28px rgb(0 0 0/.28);font-size:1.3rem;cursor:pointer;transition:color var(--gx-duration),border-color var(--gx-duration),background var(--gx-duration)}.book-float-toggle:hover,.book-float-toggle:focus-visible{border-color:var(--gx-acid);color:var(--gx-acid);outline:2px solid var(--gx-acid);outline-offset:3px}.book-float-menu{position:fixed;right:max(20px,env(safe-area-inset-right));bottom:calc(max(20px,env(safe-area-inset-bottom)) + 64px);z-index:80;box-sizing:border-box;display:grid;width:min(330px,calc(100vw - 40px));max-height:calc(100svh - 110px);overflow-y:auto;padding:1.25rem;border:1px solid var(--gx-border);border-radius:var(--gx-radius-md);background:var(--gx-surface-1);color:var(--gx-white);box-shadow:0 16px 42px rgb(0 0 0/.28)}.book-float-menu[hidden]{display:none}.book-float-brand{display:block;padding:.3rem 0 1.1rem;border-bottom:1px solid var(--gx-border)}.book-float-brand img{display:block;width:130px;height:auto}.book-float-item{display:flex;align-items:center;gap:.4rem;min-height:44px;border-bottom:1px solid var(--gx-border);color:var(--gx-white);font:600 .9rem/1.3 var(--gx-font-body);text-decoration:none}.book-float-item .ph{color:var(--gx-amber);font-size:1.05em}.book-float-item--disabled{color:var(--gx-muted);opacity:.6;cursor:not-allowed}.book-float-item .gx-nav-badge{margin-left:.15rem}.book-float-item[href]:hover,.book-float-item[href]:focus-visible{color:var(--gx-acid);outline:none}.book-float-back{display:flex;align-items:center;justify-content:space-between;min-height:44px;margin-top:.65rem;color:var(--gx-acid);font:700 .78rem/1.3 var(--gx-font-body);text-decoration:none}.book-float-back:hover,.book-float-back:focus-visible{text-decoration:underline;outline:2px solid var(--gx-acid);outline-offset:2px}
@media(max-width:1000px){.book-cover{grid-template-columns:1fr}.book-cover-art{position:relative;align-items:flex-start;min-height:380px;padding:2rem clamp(1.5rem,6vw,4rem) 3rem}.book-cover-art h1{font-size:clamp(5rem,15vw,9rem)}.book-cover-opening{min-height:0;padding:clamp(2.5rem,6vw,4rem) clamp(1.5rem,6vw,4rem) 6rem}.book-opening-copy h2{font-size:clamp(2.5rem,7vw,4rem)}}
@media(max-width:760px){.book-cover{min-height:0}.book-cover-art{min-height:340px;padding:24px 24px 40px}.book-cover-art h1{font-size:clamp(4.6rem,18vw,7rem)}.book-cover-art .book-cover-dek{margin-bottom:0}.book-cover-opening{gap:3rem;padding:2.7rem 24px 6rem}.book-opening-copy h2{font-size:clamp(2.4rem,9vw,3.8rem)}.book-mobile-index{top:0}.book-chapter{scroll-margin-top:64px}.book-mobile-hint{display:inline}.book-float-toggle{right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom))}.book-float-menu{right:max(16px,env(safe-area-inset-right));bottom:calc(max(16px,env(safe-area-inset-bottom)) + 64px)}}
@media(max-width:560px){.book-cover{min-height:0}.book-cover-art{min-height:300px}.book-volume{margin-top:1.7rem}}
@media(prefers-reduced-motion:reduce){.book-float-toggle,.book-opening-index a{transition:none}}
@media(max-width:560px){.book-endnote{box-sizing:border-box;margin-inline:0;padding:2rem 1.4rem;border-radius:var(--gx-radius-md)}}
.book-chord-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.55rem;margin:1rem 0}.book-chord-grid figure{box-sizing:border-box;display:grid;place-items:center;min-width:0;margin:0;padding:.4rem .35rem .5rem;border:0;border-radius:var(--gx-radius-sm);background:var(--book-surface)}.book-chord-grid figure figcaption{display:none}.book-chord-grid img{display:block;width:min(100%,130px);height:auto}.book-original-figure--chords>figcaption{max-width:65ch}
.book-chord-grid--labeled figure{grid-template-rows:1fr auto;align-items:end;padding-bottom:.7rem}.book-chord-grid--labeled figure figcaption{display:grid;gap:.08rem;align-self:start;margin:.45rem 0 0;color:var(--book-muted);font:600 .75rem/1.35 var(--gx-font-body);letter-spacing:.01em;text-align:center;text-wrap:balance}
@media(max-width:760px){.book-chord-grid{box-sizing:border-box;grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:clamp(150px,44%,190px);width:calc(100% + 48px);max-width:none;margin-inline:-24px;padding:0 24px .9rem;overflow-x:auto;overscroll-behavior-inline:contain;scroll-snap-type:x mandatory;scroll-padding-inline:24px;scrollbar-color:var(--book-accent) var(--book-line);-webkit-overflow-scrolling:touch}.book-chord-grid figure{scroll-snap-align:start}.book-chord-grid:focus-visible{outline:3px solid var(--book-accent);outline-offset:-3px}}
@media(max-width:640px){.book-chord-grid{width:calc(100% + 26px);margin-inline:-13px;padding-inline:13px;scroll-padding-inline:13px}}
@media(max-width:560px){.book-chord-grid{gap:.55rem}}.book-float-guides{border-bottom:1px solid var(--gx-border)}.book-float-guides summary{list-style:none;cursor:pointer;border-bottom:0}.book-float-guides summary::-webkit-details-marker{display:none}.book-float-guides summary .ph{margin-left:auto;color:currentColor;transition:transform var(--gx-duration)}.book-float-guides[open] summary .ph{transform:rotate(180deg)}.book-float-guide-link{display:block;padding:.7rem 0 1rem 1rem;color:var(--gx-muted);font:600 .82rem/1.3 var(--gx-font-body);text-decoration:none}.book-float-guide-link:hover,.book-float-guide-link:focus-visible{color:var(--gx-acid);outline:none}