*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #faf8f5;--bg-secondary: #f0ede8;--text: #2d2d2d;--text-muted: #6b6b6b;--accent: #8b6914;--border: #ddd8d0;--link: #5a6f8a;--shadow: rgba(0, 0, 0, .08);--code-bg: #f0ede8;--font-body: "Literata", Georgia, "Times New Roman", serif;--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--content-width: 38em;--line-height: 1.75}[data-theme=dark]{--bg: #1a1a1a;--bg-secondary: #242424;--text: #e0dcd5;--text-muted: #8a8680;--accent: #c9a84c;--border: #3a3632;--link: #8aa5c5;--shadow: rgba(0, 0, 0, .3);--code-bg: #2a2826}html{font-size:18px}body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:var(--line-height);transition:background .3s ease,color .3s ease;min-height:100vh}.hidden{display:none!important}.landing{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:2rem}.landing-inner{max-width:540px;width:100%;text-align:center}.landing-title{font-family:var(--font-body);font-size:2.4rem;font-weight:700;margin-bottom:.3rem;color:var(--text)}.landing-subtitle{font-family:var(--font-ui);font-size:.9rem;color:var(--text-muted);margin-bottom:2rem}.repo-form{display:flex;flex-direction:column;gap:.75rem}.repo-input{font-family:var(--font-ui);font-size:.85rem;padding:.75rem 1rem;border:1px solid var(--border);border-radius:6px;background:var(--bg-secondary);color:var(--text);outline:none;transition:border-color .2s}.repo-input:focus{border-color:var(--accent)}.repo-submit{font-family:var(--font-ui);font-size:.85rem;font-weight:600;padding:.75rem 1.5rem;background:var(--accent);color:var(--bg);border:none;border-radius:6px;cursor:pointer;transition:opacity .2s}.repo-submit:hover{opacity:.85}.repo-submit:disabled{opacity:.5;cursor:not-allowed}.token-details{margin-top:1.5rem;text-align:left}.token-details summary{font-family:var(--font-ui);font-size:.8rem;color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none}.token-inner{margin-top:.75rem;display:flex;flex-direction:column;gap:.4rem}.token-inner label{font-family:var(--font-ui);font-size:.75rem;font-weight:600;color:var(--text-muted)}.token-input{font-family:var(--font-ui);font-size:.85rem;padding:.6rem .8rem;border:1px solid var(--border);border-radius:6px;background:var(--bg-secondary);color:var(--text);outline:none;transition:border-color .2s}.token-input:focus{border-color:var(--accent)}.token-hint{font-family:var(--font-ui);font-size:.7rem;color:var(--text-muted);line-height:1.4}.token-hint code{background:var(--code-bg);padding:.1em .3em;border-radius:3px;font-size:.9em}.landing-error{font-family:var(--font-ui);font-size:.8rem;color:#c44;margin-top:1rem;padding:.6rem 1rem;background:#cc444414;border-radius:6px;text-align:left}[data-theme=dark] .landing-error{color:#f88;background:#ff64641a}.reader{display:flex;flex-direction:column;min-height:100vh}.reader-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:.5rem;padding:.6rem 1rem;background:var(--bg);border-bottom:1px solid var(--border);font-family:var(--font-ui)}.header-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:6px;background:transparent;color:var(--text-muted);cursor:pointer;transition:background .15s,color .15s}.header-btn:hover{background:var(--bg-secondary);color:var(--text)}.book-title{flex:1;font-size:.85rem;font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-right{display:flex;gap:.25rem}.toc-overlay{position:fixed;inset:0;background:#0000004d;z-index:199}.toc-panel{position:fixed;top:0;left:0;bottom:0;width:300px;max-width:85vw;background:var(--bg);border-right:1px solid var(--border);z-index:200;display:flex;flex-direction:column;box-shadow:4px 0 20px var(--shadow);overflow:hidden}.toc-header{display:flex;align-items:center;justify-content:space-between;padding:.8rem 1rem;border-bottom:1px solid var(--border);font-family:var(--font-ui);font-size:.85rem;font-weight:600}.toc-list{flex:1;overflow-y:auto;padding:.5rem 0;list-style:none;counter-reset:none}.toc-item{font-family:var(--font-ui);font-size:.8rem;line-height:1.4}.toc-item a{display:block;padding:.5rem 1.25rem;color:var(--text-muted);text-decoration:none;transition:background .1s,color .1s}.toc-item a:hover{background:var(--bg-secondary);color:var(--text)}.toc-item.active a{color:var(--accent);font-weight:600}.chapter-content{flex:1;max-width:var(--content-width);width:100%;margin:0 auto;padding:2.5rem 1.5rem 3rem}.chapter-loading{font-family:var(--font-ui);font-size:.85rem;color:var(--text-muted);text-align:center;padding:4rem 0}.chapter-error{font-family:var(--font-ui);font-size:.85rem;color:#c44;text-align:center;padding:4rem 0}.chapter-error button{margin-top:1rem;font-family:var(--font-ui);font-size:.8rem;padding:.5rem 1rem;border:1px solid var(--border);border-radius:6px;background:transparent;color:var(--text);cursor:pointer}.chapter-content h1{font-size:1.8rem;font-weight:700;margin-bottom:1.5rem;line-height:1.2}.chapter-content h2{font-size:1.3rem;font-weight:700;margin-top:2.5rem;margin-bottom:.8rem;line-height:1.3}.chapter-content h3{font-size:1.05rem;font-weight:700;margin-top:2rem;margin-bottom:.6rem}.chapter-content p{margin-bottom:1.1em}.chapter-content em{font-style:italic}.chapter-content strong{font-weight:700}.chapter-content blockquote{margin:1.5em 0;padding:.5em 1.2em;border-left:3px solid var(--accent);color:var(--text-muted);font-style:italic}.chapter-content hr{border:none;border-top:1px solid var(--border);margin:2.5em 0}.chapter-content ul,.chapter-content ol{margin:1em 0;padding-left:1.5em}.chapter-content li{margin-bottom:.3em}.chapter-content code{font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.85em;background:var(--code-bg);padding:.15em .35em;border-radius:3px}.chapter-content pre{margin:1.5em 0;padding:1em;background:var(--code-bg);border-radius:6px;overflow-x:auto}.chapter-content pre code{background:none;padding:0}.chapter-content a{color:var(--link);text-decoration:underline;text-underline-offset:2px}.chapter-content p:has(>br:only-child),.chapter-content p:only-child:empty{margin:2em 0}.reader-footer{position:sticky;bottom:0;display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem;background:var(--bg);border-top:1px solid var(--border);font-family:var(--font-ui)}.nav-btn{font-family:var(--font-ui);font-size:.8rem;padding:.5rem 1rem;border:1px solid var(--border);border-radius:6px;background:transparent;color:var(--text);cursor:pointer;transition:background .15s,border-color .15s;min-width:100px}.nav-btn:hover:not(:disabled){background:var(--bg-secondary);border-color:var(--text-muted)}.nav-btn:disabled{opacity:.35;cursor:not-allowed}.chapter-progress{font-size:.75rem;color:var(--text-muted)}@media(max-width:640px){html{font-size:16px}.chapter-content{padding:1.5rem 1rem 2rem}.landing-title{font-size:1.8rem}.nav-btn{min-width:80px;padding:.5rem .6rem;font-size:.75rem}}