html{scroll-behavior:smooth;overflow-x:clip}body{overflow-x:clip}.book-page{--reader-font-size:1.05rem;padding-bottom:70px}
.book-topbar{position:sticky;top:0;z-index:10;backdrop-filter:blur(12px)}
.book-intro{padding:46px 0 30px;max-width:800px}.book-intro h1{font-size:clamp(2.35rem,5vw,4.5rem);line-height:1.08;letter-spacing:-.035em;margin:.7rem 0 1rem}.book-intro>p:last-child{font-size:1.15rem;color:var(--muted);max-width:720px}
.book-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 20px;background:var(--panel2);border:1px solid var(--line);border-radius:14px 14px 0 0}.book-toolbar>div:first-child{display:flex;align-items:baseline;flex-wrap:wrap;gap:10px}.book-toolbar strong{color:var(--accent)}#chapter-name{color:var(--muted)}.type-tools{display:flex;align-items:center;gap:8px;white-space:nowrap}.type-tools span{font-size:.82rem;color:var(--muted);margin-right:4px}.type-tools button{border:1px solid #4a6974;border-radius:8px;background:#132631;color:var(--ink);padding:5px 10px;font:700 1rem system-ui;cursor:pointer}.type-tools button:hover,.type-tools button:focus-visible{background:#254351;outline:2px solid var(--accent);outline-offset:2px}
.book-progress{height:5px;background:#203440;overflow:hidden}.book-progress span{display:block;width:11.11%;height:100%;background:var(--accent);transition:width .25s}
.book-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:25px;align-items:start;padding-top:25px}.book-sidebar{position:sticky;top:92px;background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:16px;max-height:calc(100vh - 110px);overflow:auto}.book-sidebar summary{cursor:pointer;font-weight:750;color:var(--ink);padding:5px 0 12px}.book-sidebar nav{display:grid;gap:4px}.book-sidebar nav a{display:flex;gap:9px;padding:9px;border-radius:9px;color:var(--muted);text-decoration:none;line-height:1.3;font-size:.91rem}.book-sidebar nav a:hover,.book-sidebar nav a[aria-current=page]{background:#203944;color:#f4fbfb}.book-sidebar nav a[aria-current=page]{box-shadow:inset 3px 0 var(--accent)}.toc-number{font-weight:800;color:var(--accent);min-width:22px}.book-side-note{font-size:.78rem;line-height:1.45;color:var(--muted);border-top:1px solid var(--line);padding-top:12px;margin:16px 0 0}
.book-reading{min-width:0}.book-chapter{scroll-margin-top:95px}.js-reader .book-chapter[hidden]{display:none!important}.chapter-kicker{font-size:.8rem;font-weight:800;letter-spacing:.12em;color:var(--accent);padding:0 0 12px}.book-chapter .article{font-size:var(--reader-font-size);line-height:1.78;max-width:880px;margin:0;overflow-wrap:anywhere}.book-chapter .article .table-wrap{max-width:100%;overflow-x:auto}.book-chapter .article h2:first-of-type{font-size:clamp(1.8rem,3.4vw,2.8rem);line-height:1.17;letter-spacing:-.02em;margin:.2rem 0 1.5rem}.book-chapter .article h3{font-size:1.43rem;line-height:1.3;margin:2.2rem 0 .7rem}.book-chapter .article h4{font-size:1.15rem;margin:1.6rem 0 .5rem}.book-chapter .article p,.book-chapter .article li{line-height:1.8}.book-chapter .article a:focus-visible,.book-sidebar a:focus-visible,.book-nav-button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.book-chapter .demo{margin-top:42px}.book-chapter .demo h3{margin:0 0 9px}.transcript{margin:36px 0;border:1px solid var(--line);border-radius:12px;background:#101d27}.transcript summary{cursor:pointer;padding:14px 18px;font-weight:700}.transcript-body{padding:0 18px 18px;border-top:1px solid var(--line)}.book-chapter-nav{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:22px;margin-top:34px}.book-nav-button{display:inline-flex;align-items:center;min-height:46px;padding:10px 15px;border:1px solid #4b6571;border-radius:10px;text-decoration:none;font-weight:700}.book-nav-button.primary{background:var(--accent);color:#092225;border-color:var(--accent)}.book-nav-button:hover{filter:brightness(1.12)}
@media(max-width:860px){.book-layout{grid-template-columns:1fr}.book-sidebar{position:static;max-height:none}.book-sidebar nav{grid-template-columns:repeat(2,minmax(0,1fr))}.book-side-note{display:none}.book-chapter .article{max-width:none}}
@media(max-width:580px){.book-intro{padding:28px 0 18px}.book-intro h1{font-size:2.2rem}.book-toolbar{align-items:flex-start;flex-direction:column;padding:12px}.book-sidebar nav{grid-template-columns:1fr}.book-layout{gap:14px;padding-top:14px}.book-sidebar{padding:12px}.book-chapter .article{padding:20px 16px}.book-chapter-nav{flex-wrap:wrap}.book-nav-button{font-size:.88rem}.book-topbar{position:static}}
@media print{.book-topbar,.book-toolbar,.book-progress,.book-sidebar,.book-chapter-nav,.footer{display:none!important}.book-layout{display:block}.book-chapter[hidden]{display:block!important}.book-chapter{break-before:page}.book-chapter .article{border:0;padding:0;background:#fff;color:#111}.book-chapter .article p,.book-chapter .article li{color:#111}.demo iframe{display:none}}