@font-face{font-family:Rubik;font-style:normal;font-weight:300 900;font-display:swap;src:url(/fonts/Rubik-Variable.woff2) format("woff2")}@font-face{font-family:Sys;font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/Sys-Bold.woff2) format("woff2")}:root{--sentry-bg: #1f1633;--sentry-bg-deep: #150f23;--sentry-border: #362d59;--sentry-border-2: #584674;--sentry-purple: #6a5fc1;--sentry-muted-purple: #79628c;--sentry-violet: #422082;--sentry-lime: #c2ef4e;--sentry-blue: #2b5cff;--sentry-coral: #ffb287;--sentry-pink: #fa7faa;--bg: var(--sentry-bg);--fg: #ffffff;--muted: #b3abce;--rule: var(--sentry-border);--link: var(--sentry-purple);--surface: #251b40;--surface-2: var(--sentry-bg-deep);--accent: var(--sentry-lime);--accent-warm: var(--sentry-coral);--chip: #2b2148;--btn-bg: var(--sentry-muted-purple);--btn-border: var(--sentry-border-2);--btn-fg: #ffffff;--radius-sm: 6px;--radius: 8px;--radius-lg: 12px;--radius-btn: 13px;--radius-pill: 18px;--shadow-inset: rgba(0, 0, 0, .1) 0 1px 3px 0 inset;--shadow-1: rgba(0, 0, 0, .08) 0 2px 8px;--shadow-2: rgba(0, 0, 0, .1) 0 10px 15px -3px;--shadow-3: rgba(0, 0, 0, .18) 0 .5rem 1.5rem;--shadow-ambient: rgba(22, 15, 36, .9) 0 4px 4px 9px;--font-ui: "Rubik", -apple-system, system-ui, "Segoe UI", Helvetica, Arial, sans-serif;--font-display: -apple-system, system-ui, "Segoe UI", Helvetica, Arial, sans-serif;--font-mono: "Monaco", "Menlo", "Ubuntu Mono", monospace;--font-serif: Georgia, "Iowan Old Style", serif;--font-wordmark: "Sys", var(--font-display);--reader-font-scale: 1;--measure: 68ch;color-scheme:dark;--pagefind-ui-primary: var(--sentry-purple);--pagefind-ui-text: var(--fg);--pagefind-ui-background: var(--surface);--pagefind-ui-border: var(--rule);--pagefind-ui-tag: var(--surface-2);--pagefind-ui-border-radius: var(--radius);--pagefind-ui-font: var(--font-ui)}[data-theme=light]{color-scheme:light;--bg: #fbfaf7;--fg: #1a1a1a;--muted: #666;--rule: #e4e0d8;--link: #6a5fc1;--surface: #ffffff;--surface-2: #f4f2ee;--chip: #efece6;--btn-bg: #ffffff;--btn-border: #cfcfdb;--btn-fg: #1f1633;--accent: #422082;--pagefind-ui-background: #ffffff}[data-theme=sepia]{color-scheme:light;--bg: #f4ecd8;--fg: #4b3a26;--muted: #7a6a54;--rule: #e0d3b8;--link: #8a4b1a;--surface: #efe6cf;--surface-2: #e9dfc4;--chip: #e6dcc2;--btn-bg: #efe6cf;--btn-border: #d8c9a6;--btn-fg: #4b3a26;--accent: #8a4b1a;--pagefind-ui-background: #efe6cf}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--fg);font:400 calc(1.125rem * var(--reader-font-scale))/1.7 var(--font-serif);-webkit-font-smoothing:antialiased}a{color:var(--link)}h1,h2,h3{font-family:var(--font-display);letter-spacing:-.01em}h1{font-weight:800}article h1,article h2,article h3,article h4{font-family:var(--font-serif);font-weight:700;letter-spacing:normal}.topbar{position:sticky;top:0;z-index:10;display:flex;gap:1rem;align-items:center;justify-content:space-between;padding:.6rem 1rem;background:color-mix(in srgb,var(--surface-2) 88%,transparent);backdrop-filter:blur(18px) saturate(180%);border-bottom:1px solid var(--rule);font-family:var(--font-ui);font-size:.9rem}.topbar .book-id{font-weight:600;letter-spacing:.01em}.brand{display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;color:inherit;font-weight:700;letter-spacing:-.01em}.brand img{display:block;height:30px;width:auto}.brand span{font-family:var(--font-wordmark);font-weight:700;font-size:1.2rem;letter-spacing:.01em}.brand:hover span{color:var(--sentry-purple)}.brand-mark{gap:0}.reader-grid{display:grid;grid-template-columns:300px minmax(0,1fr);gap:2rem;max-width:1200px;margin:0 auto;padding:1.5rem 1rem}.toc{position:sticky;top:4rem;align-self:start;max-height:calc(100vh - 5rem);overflow:auto;font-family:var(--font-ui);font-size:.85rem;line-height:1.4}.toc ul{list-style:none;margin:0;padding-left:.75rem}.toc a{display:block;padding:.15rem 0;color:var(--muted);text-decoration:none}.toc a:hover{color:var(--fg)}.toc .toc-current{color:var(--fg);font-weight:600}main{min-width:0}article{max-width:var(--measure)}article img,article svg{max-width:100%;height:auto}article math{font-size:1.05em}.math-block,article [display=block]{overflow-x:auto}article a{text-decoration-color:color-mix(in srgb,var(--link) 45%,transparent);text-underline-offset:2px}article a:hover{text-decoration-color:var(--link)}article blockquote{border-left:3px solid var(--link);padding-left:1rem;margin:1.5rem 0;font-style:italic;color:color-mix(in srgb,var(--fg) 88%,var(--muted))}.chapter-nav{display:flex;justify-content:space-between;max-width:var(--measure);margin:3rem 0 1rem;padding-top:1rem;border-top:1px solid var(--rule);font-family:var(--font-ui)}.controls button,.drawer-toggle{font:600 .82rem/1 var(--font-ui);background:var(--btn-bg);color:var(--btn-fg);border:1px solid var(--btn-border);border-radius:var(--radius-btn);padding:.3rem .6rem;cursor:pointer;box-shadow:var(--shadow-inset);transition:box-shadow .15s ease,transform .05s ease}.controls button:hover,.drawer-toggle:hover{box-shadow:var(--shadow-3)}.controls button:active,.drawer-toggle:active{transform:translateY(1px)}.controls{display:flex;gap:.4rem}.drawer-toggle{display:none}@media(max-width:860px){.reader-grid{grid-template-columns:1fr}.toc{position:fixed;inset:3.2rem 0 0;background:var(--bg);padding:1rem;max-height:none;transform:translate(-100%);transition:transform .2s;z-index:20}.toc.open{transform:translate(0)}.drawer-toggle{display:inline-block}}.purple-number{font:600 .7em/1 var(--font-ui);color:#c99bdb;text-decoration:none;vertical-align:super;margin-right:.35em;user-select:none}.purple-number:hover{text-decoration:underline}[data-theme=light] .purple-number,[data-theme=sepia] .purple-number{color:#8a4b9e}@media(min-width:1200px){article p,article blockquote{position:relative}.purple-number{position:absolute;left:100%;top:.2em;margin:0 0 0 1rem;width:3.25rem;text-align:left;vertical-align:baseline;font-size:.72em;line-height:1.7}}.site-nav{display:flex;gap:1.1rem;align-items:center;font-family:var(--font-ui);font-size:.8rem}.site-nav a{text-decoration:none;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:500;padding-bottom:3px;border-bottom:2px solid transparent;transition:color .15s ease}.site-nav a:hover{color:var(--fg)}.site-nav a.active{color:var(--fg);font-weight:600;border-bottom-color:var(--accent)}.book-card{display:block;text-decoration:none;color:inherit;transition:transform .12s ease}.book-card .cover{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);box-shadow:var(--shadow-2);overflow:hidden;transition:box-shadow .15s ease,border-color .15s ease}.book-card:hover{transform:translateY(-3px)}.book-card:hover .cover{box-shadow:var(--shadow-3);border-color:var(--sentry-purple)}.explore-card{display:block;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);padding:1.1rem 1.2rem;transition:box-shadow .15s ease,border-color .15s ease,transform .12s ease}.explore-card:hover{box-shadow:var(--shadow-2);border-color:var(--sentry-purple);transform:translateY(-2px)}.explore-card .explore-title{font-weight:600;font-family:var(--font-ui)}.explore-card .explore-desc{color:var(--muted);font-size:.9rem;margin-top:.3rem;font-family:var(--font-ui)}.kicker{display:inline-block;font-family:var(--font-ui);font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.12em;color:var(--accent)}