@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/46a9e2f250689b4a-s.0-dom-5bn10r2.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/76b70a1dbe058eb5-s.1y4-pdgsjb-pw.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/2fb76073e23fd9e4-s.3lvt2whj97whp.woff2)format("woff2");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/6131cbbf5549afa2-s.2uwcyprjm3xu3.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/45462fd7b7c12654-s.0k62hbripvv8p.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/ba63f6a0e436df8e-s.3-6t-g6q0vh0a.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/07c7676b89ed2778-s.p.2bn3s6zvc0dyp.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Inter Fallback;src:local(Arial);ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.0%;size-adjust:107.12%}._3qanGa_className{font-family:Inter,Inter Fallback;font-style:normal}._3qanGa_variable{--font-ui:"Inter", "Inter Fallback"}
@font-face{font-family:Fraunces;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/4f6d02175fe8de3f-s.3pdm20a023wv-.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Fraunces;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/bf89ab4b246099fe-s.16191ingcc7md.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Fraunces;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/0264c3c98799c37c-s.p.0fuf3937kiol3.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Fraunces Fallback;src:local(Times New Roman);ascent-override:84.71%;descent-override:22.09%;line-gap-override:0.0%;size-adjust:115.45%}._5EAlGq_className{font-family:Fraunces,Fraunces Fallback;font-style:normal}._5EAlGq_variable{--font-display:"Fraunces", "Fraunces Fallback"}
@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/258bd0ab5fdd762a-s.2f7nqdagzwx2-.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/99a2019bdfa8519b-s.176arc174-8zp.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/44e0cb21b0d052b7-s.0bp8oijd_gu96.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/f9cd5a77d065db98-s.1fby2rem9ngyr.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/954d21e04331b2ae-s.0vfdmo25voy_0.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C4,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:JetBrains Mono;font-style:normal;font-weight:100 800;font-display:swap;src:url(../media/53897e768d329f66-s.p.3t6q91iet4nsy.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono Fallback;src:local(Arial);ascent-override:75.79%;descent-override:22.29%;line-gap-override:0.0%;size-adjust:134.59%}.PA9cZa_className{font-family:JetBrains Mono,JetBrains Mono Fallback;font-style:normal}.PA9cZa_variable{--font-code:"JetBrains Mono", "JetBrains Mono Fallback"}
:root{--paper:#fbfaf7;--card:#fff;--ink:#1b1b2f;--muted:#6b6a80;--line:#e6e3da;--wash:#f3f1ea;--indigo:#4f46e5;--indigo-ink:#fff;--amber:#f59e0b;--teal:#14b8a6;--coral:#f43f5e;--green:#16a34a;--sky:#0ea5e9;--code-bg:#17162a;--code-bar:#201f38;--code-ink:#e8e7f6;--code-line:#34325a;--shadow:0 1px 2px #1b1b2f0f, 0 8px 24px #1b1b2f14;--shadow-lg:0 2px 4px #1b1b2f0f, 0 24px 60px #4f46e529;--font-text:var(--font-ui), system-ui, -apple-system, "Segoe UI", sans-serif;--font-head:var(--font-display), Georgia, "Times New Roman", serif;--font-mono:var(--font-code), ui-monospace, Menlo, Consolas, monospace;--header-h:62px}@media (prefers-color-scheme:dark){:root{--paper:#12111c;--card:#1c1b2b;--ink:#ecebf5;--muted:#9a99b3;--line:#2f2e45;--wash:#181727;--indigo:#8b85ff;--indigo-ink:#12111c;--code-bg:#0d0c17;--code-bar:#17162a;--code-line:#2a2850;--shadow:0 1px 2px #0006, 0 8px 24px #00000059;--shadow-lg:0 2px 4px #0006, 0 24px 60px #00000080}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);font:17px/1.65 var(--font-text);-webkit-font-smoothing:antialiased;margin:0}a{color:var(--indigo);text-underline-offset:3px}h1,h2,h3{font-family:var(--font-head);letter-spacing:-.01em;margin:0;line-height:1.15}img{max-width:100%;height:auto}::selection{background:color-mix(in srgb, var(--indigo) 30%, transparent)}:focus-visible{outline:3px solid var(--indigo);outline-offset:2px;border-radius:6px}main{min-height:60vh}.container{max-width:760px;margin:0 auto;padding:40px 18px 72px}.container h1{margin-bottom:10px;font-size:2.2rem}.muted{color:var(--muted)}.small{color:var(--muted);font-size:.9rem}.eyebrow{font:700 .76rem/1 var(--font-text);letter-spacing:.14em;text-transform:uppercase;color:var(--indigo);margin:0 0 12px}.site-header{z-index:40;height:var(--header-h);background:color-mix(in srgb, var(--paper) 82%, transparent);-webkit-backdrop-filter:saturate(1.6)blur(14px);backdrop-filter:saturate(1.6)blur(14px);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:14px;padding:0 22px;display:flex;position:sticky;top:0}.brand{color:var(--ink);letter-spacing:-.01em;align-items:center;gap:10px;font-weight:700;text-decoration:none;display:flex}.brand i{color:var(--muted);font-style:normal;font-weight:500}.logo{color:#fff;width:34px;height:34px;font:700 .85rem var(--font-mono);background:linear-gradient(135deg, var(--indigo), var(--sky) 60%, var(--teal));box-shadow:0 4px 14px color-mix(in srgb, var(--indigo) 45%, transparent);border-radius:10px;place-items:center;display:grid}.site-header nav{align-items:center;gap:6px;display:flex}.site-header nav a,.linklike{color:var(--ink);cursor:pointer;background:0 0;border:0;border-radius:999px;padding:7px 12px;font-family:inherit;font-size:.95rem;font-weight:500;text-decoration:none}.site-header nav a:hover,.linklike:hover{background:var(--wash)}.site-header nav form{margin:0}@media (max-width:640px){.brand i{display:none}.site-header{gap:8px;padding:0 12px}.brand{min-width:0;font-size:.95rem}.site-header nav{flex-shrink:0;gap:0}.site-header nav a,.linklike{white-space:nowrap;padding:6px 8px;font-size:.85rem}.site-header nav a.btn{padding:6px 12px}}@media (max-width:520px){.brand span:last-child{display:none}.brand .logo{display:inline-flex}}.btn{background:var(--indigo);font:600 1rem var(--font-text);cursor:pointer;box-shadow:0 6px 18px color-mix(in srgb, var(--indigo) 38%, transparent);border:0;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:11px 22px;text-decoration:none;transition:transform .15s,box-shadow .15s;display:inline-flex;color:var(--indigo-ink)!important}.btn:hover{box-shadow:0 10px 26px color-mix(in srgb, var(--indigo) 46%, transparent);transform:translateY(-2px)}.btn:disabled{opacity:.6;cursor:wait;transform:none}.btn.big{padding:15px 30px;font-size:1.08rem}.btn.ghost{border:2px solid var(--line);box-shadow:none;background:0 0;color:var(--ink)!important}.btn.ghost:hover{border-color:var(--indigo);box-shadow:none}.btn.danger{background:var(--coral);box-shadow:none;color:#fff!important}.small-btn{box-shadow:none;padding:7px 16px;font-size:.92rem}.card{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;margin:18px 0;padding:22px 24px}.form{gap:16px;display:grid}.form label{gap:5px;font-weight:600;display:grid}.form small{color:var(--muted);font-size:.9rem;font-weight:400}.form input[type=text],.form input[type=email],.form select{font:inherit;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;padding:11px 13px}.form input:focus,.form select:focus{border-color:var(--indigo);box-shadow:0 0 0 4px color-mix(in srgb, var(--indigo) 18%, transparent);outline:none}.form .check{align-items:flex-start;gap:11px;font-weight:400;display:flex}.form .check input{width:18px;height:18px;accent-color:var(--indigo);margin-top:6px}.req,.opt{color:var(--muted);font-size:.85rem;font-weight:400}.error{color:var(--coral);margin:0;font-weight:600}.note{background:color-mix(in srgb, var(--amber) 16%, var(--card));border-radius:14px;margin:0;padding:12px 16px}.draft-banner{background:color-mix(in srgb, var(--coral) 12%, var(--card));border:2px dashed var(--coral);border-radius:14px;margin-bottom:22px;padding:12px 16px}.ok{background:color-mix(in srgb, var(--green) 16%, var(--card));color:var(--ink);border-radius:14px;padding:10px 16px}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);padding:8px 10px}.bar{background:var(--indigo);border-radius:6px;min-width:2px;height:12px}.stats{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;display:grid}.stat b{font:700 2rem var(--font-head);display:block}.site-footer{background:var(--code-bg);color:var(--code-ink);margin-top:40px;padding:56px 24px 28px}.foot-grid{grid-template-columns:2fr 1fr 1fr;gap:36px;max-width:1100px;margin:0 auto;display:grid}.foot-grid b{font-family:var(--font-head);font-size:1.15rem}.foot-grid p{color:#aeadc9;margin:8px 0 16px}.foot-grid ul{margin:10px 0 0;padding:0;list-style:none}.foot-grid li{padding:3px 0}.site-footer a{color:#cfcdf5;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer .btn{color:#fff!important}.copy{color:#8b8aa8;border-top:1px solid #2f2e55;max-width:1100px;margin:36px auto 0;padding-top:18px;font-size:.9rem}@media (max-width:700px){.foot-grid{grid-template-columns:1fr}}.landing{background:radial-gradient(1200px 500px at 70% -10%, color-mix(in srgb, var(--indigo) 14%, transparent), transparent), var(--paper);padding:84px 22px 96px;position:relative;overflow:hidden}.blob{filter:blur(60px);opacity:.55;pointer-events:none;border-radius:50%;animation:14s ease-in-out infinite float;position:absolute}.b1{background:color-mix(in srgb, var(--indigo) 55%, transparent);width:420px;height:420px;top:-60px;left:-120px}.b2{background:color-mix(in srgb, var(--teal) 50%, transparent);width:360px;height:360px;animation-delay:-5s;bottom:-120px;right:6%}.b3{background:color-mix(in srgb, var(--amber) 55%, transparent);width:280px;height:280px;animation-delay:-9s;top:-90px;right:34%}@keyframes float{0%,to{transform:translate(0)scale(1)}50%{transform:translate(34px,26px)scale(1.08)}}.landing-inner{grid-template-columns:1.15fr 1fr;align-items:center;gap:48px;max-width:1140px;margin:0 auto;display:grid;position:relative}.landing h1{font-size:clamp(2.5rem,5.4vw,4.4rem);font-weight:700}.swash{background:linear-gradient(100deg, var(--indigo), var(--sky) 55%, var(--teal));color:#0000;-webkit-background-clip:text;background-clip:text;font-style:italic}.lead{color:var(--muted);max-width:34em;font-size:1.25rem}.cta{flex-wrap:wrap;gap:14px;margin:28px 0 0;display:flex}.facts{color:var(--muted);gap:28px;margin:34px 0 0;padding:0;list-style:none;display:flex}.facts b{font:700 1.8rem var(--font-head);color:var(--ink);display:block}.landing-art{place-items:center;display:grid}.mock{background:var(--code-bg);width:min(420px,100%);color:var(--code-ink);box-shadow:var(--shadow-lg);border-radius:22px;animation:6s ease-in-out infinite bob;overflow:hidden;transform:rotate(2deg)}@keyframes bob{0%,to{transform:rotate(2deg)translateY(0)}50%{transform:rotate(1deg)translateY(-12px)}}.mock-bar{background:var(--code-bar);font:600 .8rem var(--font-mono);color:#9b9ac4;align-items:center;gap:7px;padding:12px 16px;display:flex}.mock-bar i{background:#f43f5e;border-radius:50%;width:11px;height:11px}.mock-bar i:nth-child(2){background:#f59e0b}.mock-bar i:nth-child(3){background:#22c55e}.mock-bar span{margin-left:8px}.mock pre{font:15px/1.9 var(--font-mono);margin:0;padding:16px 0}.mock .l{white-space:pre;padding:0 18px 0 0;display:block}.mock .l b{text-align:right;color:#5f5e8a;width:40px;padding-right:14px;font-weight:400;display:inline-block}.mock .l.hot{background:color-mix(in srgb, var(--amber) 22%, transparent);box-shadow:inset 4px 0 var(--amber);animation:2.4s ease-in-out infinite pulse}@keyframes pulse{50%{background:color-mix(in srgb, var(--amber) 8%, transparent)}}.mock em{font-style:normal}.mock .k{color:#e19cff;font-weight:600}.mock .f{color:#7cc4ff}.mock .n{color:#ffb066}.mock-mem{border-top:1px solid var(--code-line);background:#100f20;gap:16px;padding:18px 20px 22px;display:flex}.tag{font:600 .78rem var(--font-mono);color:#9b9ac4;justify-items:center;gap:6px;display:grid}.chip{min-width:56px;font:700 1.3rem var(--font-mono);text-align:center;color:#fff;border-radius:12px;padding:8px 14px}.chip.int{background:linear-gradient(135deg,#4f46e5,#6d66ff)}.c1{animation:4.8s infinite tick1}.c2{animation:4.8s infinite tick2}@keyframes tick1{0%,to{transform:scale(1)}20%{background:#14b8a6;transform:scale(1.18)}40%{transform:scale(1)}}@keyframes tick2{0%,50%{transform:scale(1)}65%{background:#f59e0b;transform:scale(1.18)}85%,to{transform:scale(1)}}@media (max-width:900px){.landing-inner{grid-template-columns:1fr}.landing-art{order:-1}.landing{padding-top:48px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.band{padding:72px 22px}.band.alt{background:var(--wash);border-block:1px solid var(--line)}.band-inner{max-width:1140px;margin:0 auto}.band-inner.center{text-align:center;max-width:720px}.section-title{margin-bottom:26px;font-size:clamp(1.8rem,3vw,2.5rem)}.features{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:22px;display:grid}.feature{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:26px;transition:transform .2s}.feature:hover{transform:translateY(-5px)}.feature .fi{background:color-mix(in srgb, var(--indigo) 12%, var(--card));border-radius:16px;place-items:center;width:52px;height:52px;margin-bottom:14px;font-size:1.6rem;display:grid}.feature h3{margin-bottom:6px;font-size:1.25rem}.feature p{color:var(--muted);margin:0;font-size:.98rem}.parts-grid{grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:18px;display:grid}.part-card{background:var(--card);border:1px solid var(--line);border-top:5px solid var(--c);box-shadow:var(--shadow);border-radius:18px;padding:20px 22px}.part-card h3{color:var(--c);margin-bottom:10px;font-size:1.1rem}ul.plain{margin:0;padding:0;list-style:none}ul.plain li{padding:3px 0}.part-card li a{color:var(--ink);border-radius:8px;gap:10px;padding:4px 6px;font-size:.96rem;text-decoration:none;display:flex}.part-card li a:hover{background:var(--wash)}.part-card li span{min-width:22px;color:var(--c);font-variant-numeric:tabular-nums;font-weight:700}.cta-band{color:#fff;background:linear-gradient(135deg,#312e81,#4f46e5 55%,#0ea5e9)}.cta-band h2{margin-bottom:10px;font-size:clamp(1.9rem,3.4vw,2.8rem)}.cta-band p{color:#e0e7ff;font-size:1.1rem}.cta-band .cta{justify-content:center}.cta-band .btn{background:#fff;color:#312e81!important}.cta-band .btn.ghost{background:0 0;border-color:#ffffff80;color:#fff!important}.progress{top:var(--header-h);z-index:35;background:0 0;height:3px;position:fixed;left:0;right:0}.progress>div{transform-origin:0;background:linear-gradient(90deg, var(--indigo), var(--sky), var(--teal));height:100%}.read-shell{grid-template-columns:300px minmax(0,1fr);align-items:start;display:grid}.toc{top:var(--header-h);height:calc(100vh - var(--header-h));border-right:1px solid var(--line);background:var(--card);scrollbar-width:thin;padding:14px 10px 48px;font-size:.92rem;position:sticky;overflow-y:auto}.toc-toggle{display:none}.toc-home{background:color-mix(in srgb, var(--indigo) 10%, var(--card));border-radius:10px;padding:9px 12px;font-weight:600;text-decoration:none;display:block}.toc-part{margin-top:18px}.toc-part-title{font:700 .7rem/1 var(--font-text);letter-spacing:.12em;text-transform:uppercase;color:var(--indigo);padding:0 12px}.toc-part-sub{font:600 .95rem var(--font-head);color:var(--ink);padding:3px 12px 6px}.toc ul{margin:0;padding:0;list-style:none}.toc-ch{align-items:flex-start;display:flex}.toc-ch a{color:var(--ink);border-radius:8px;flex:1;padding:6px 8px 6px 2px;line-height:1.3;text-decoration:none}.toc-ch a:hover,.toc-secs a:hover{background:var(--wash)}.toc .num{min-width:1.4em;color:var(--muted);font-variant-numeric:tabular-nums;display:inline-block}.chev{color:var(--muted);cursor:pointer;background:0 0;border:0;width:26px;padding:6px 0;font-size:.9rem}li.active>.toc-ch a{color:var(--indigo);background:color-mix(in srgb, var(--indigo) 9%, transparent);font-weight:700}.toc-secs{border-left:2px solid var(--line);margin:0 0 8px 24px}.toc-secs a{color:var(--muted);border-radius:0 8px 8px 0;padding:4px 12px;font-size:.88rem;line-height:1.3;text-decoration:none;display:block}.toc-secs li.active a{color:var(--indigo);font-weight:600}.read-main{min-width:0;padding-bottom:80px}.chapter-hero{color:#fff;background:linear-gradient(130deg, hsl(var(--hue) 70% 30%), hsl(calc(var(--hue) + 40) 80% 45%) 60%, hsl(calc(var(--hue) + 80) 85% 55%));padding:56px clamp(18px,5vw,64px) 46px;position:relative;overflow:hidden}.hero-glow{aspect-ratio:1;background:radial-gradient(closest-side,#fff5,#0000);border-radius:50%;width:60%;position:absolute;inset:auto -10% -60% auto}.chapter-hero .eyebrow{color:#fffc}.hero-row{align-items:center;gap:clamp(16px,3vw,40px);max-width:1040px;margin:0 auto;display:flex;position:relative}.big-num{font:700 clamp(4rem, 12vw, 9rem)/.85 var(--font-head);opacity:.9;text-shadow:0 8px 30px #0003;text-align:center;min-width:.7em}.chapter-hero h1{text-wrap:balance;font-size:clamp(1.9rem,4.4vw,3.2rem);font-weight:700}.kicker{letter-spacing:.08em;text-transform:uppercase;opacity:.85;margin:0 0 4px;font-size:.85rem;font-weight:700}.meta{opacity:.8;margin:10px 0 0;font-size:.95rem}.chapter-hero>.eyebrow{max-width:1040px;margin:0 auto 14px}.hero-title{max-width:1040px;margin:0 auto;font-size:clamp(2rem,4.6vw,3.4rem)}.lead-on-hero{opacity:.92;max-width:1040px;margin:14px auto 0;font-size:1.2rem}.chapter{padding:8px clamp(14px,3vw,40px) 0}.prose-col{max-width:1040px;margin:0 auto}.prose{max-width:700px;margin:1.05em auto;font-size:1.12rem;line-height:1.78}.prose-col>.prose:first-child:first-letter{font:700 3.6em/.8 var(--font-head);float:left;color:var(--indigo);padding:.06em .1em 0 0}.prose code,.callout code,td code,th code,.answer-box code,.ex-body code{font:.88em var(--font-mono);background:var(--wash);border:1px solid var(--line);overflow-wrap:anywhere;border-radius:6px;padding:.08em .38em}.prose.list ul,.prose.list ol,.callout ul,.callout ol{margin:0;padding-left:1.4em}.prose.list li,.callout li{margin:.35em 0;padding-left:.2em}.prose.list ul li::marker{color:var(--indigo)}.callout ul li::marker{color:var(--indigo)}.h-section{max-width:700px;scroll-margin-top:calc(var(--header-h) + 14px);border-top:1px solid var(--line);margin:2.8em auto .7em;padding-top:1.1em;font-size:clamp(1.7rem,3vw,2.3rem);position:relative}.h-section:before{content:"";background:linear-gradient(90deg, var(--indigo), var(--teal));border-radius:4px;width:64px;height:4px;position:absolute;top:-1px;left:0}.anchor{font:600 1rem var(--font-text);color:var(--muted);opacity:0;text-decoration:none;transition:opacity .15s;position:absolute;top:1.15em;left:-1.1em}.h-section:hover .anchor{opacity:1}.h-sub{max-width:700px;font:700 1.25rem var(--font-head);color:var(--indigo);scroll-margin-top:calc(var(--header-h) + 14px);margin:2em auto .4em}.pull{border-left:5px solid var(--amber);max-width:700px;font:italic 600 1.3rem/1.5 var(--font-head);color:var(--ink);margin:1.6em auto;padding:6px 0 6px 22px}.callout{--c:var(--indigo);background:color-mix(in srgb, var(--c) 9%, var(--card));border:1px solid color-mix(in srgb, var(--c) 28%, var(--line));border-left:6px solid var(--c);max-width:700px;box-shadow:var(--shadow);border-radius:16px;gap:14px;margin:1.6em auto;padding:16px 20px;display:flex}.callout.tip{--c:var(--green)}.callout.warning{--c:var(--coral)}.callout.story{--c:var(--amber)}.callout.stuck{--c:var(--sky)}.callout.reminder{--c:var(--teal)}.callout.job{--c:#8b5cf6}.callout.try{--c:var(--teal)}.callout-icon{font-size:1.6rem;line-height:1.3}.callout-body{flex:1;min-width:0}.callout-body .prose,.callout-body .list{max-width:none;margin:.5em 0;font-size:1.04rem;line-height:1.65}.callout-title{font:700 1.05rem var(--font-head);color:var(--c);margin-bottom:2px}.table-wrap{border:1px solid var(--line);background:var(--card);max-width:700px;box-shadow:var(--shadow);border-radius:14px;margin:1.6em auto;overflow-x:auto}.table-wrap table{font-size:.98rem}.table-wrap th{background:var(--wash);letter-spacing:.02em;font-size:.85rem;font-weight:700}.table-wrap tr:last-child td{border-bottom:0}.figure{text-align:center;max-width:640px;margin:2em auto}.figure.raster{max-width:520px}.figure img{border:1px solid var(--line);width:100%;max-width:100%;height:auto;box-shadow:var(--shadow);background:#fff;border-radius:14px}.figure figcaption,.codecard figcaption{color:var(--muted);margin-top:10px;font-size:.92rem}.codecard{background:var(--code-bg);max-width:700px;color:var(--code-ink);box-shadow:var(--shadow-lg);border:1px solid var(--code-line);border-radius:16px;margin:1.6em auto;overflow:hidden}.codecard.wide,.codecard.open{max-width:1040px}.codecard-bar{background:var(--code-bar);border-bottom:1px solid var(--code-line);font:600 .8rem var(--font-mono);color:#9b9ac4;align-items:center;gap:12px;padding:9px 14px;display:flex}.dots{gap:6px;display:flex}.dots i{background:#f43f5e;border-radius:50%;width:11px;height:11px}.dots i:nth-child(2){background:#f59e0b}.dots i:nth-child(3){background:#22c55e}.codecard-title{letter-spacing:.04em;text-transform:uppercase;flex:1;font-size:.72rem}.codecard-actions{gap:8px;display:flex}.pill{font:600 .78rem var(--font-text);color:#e8e7f6;cursor:pointer;background:#ffffff14;border:1px solid #ffffff2a;border-radius:999px;padding:6px 13px;transition:background .15s,transform .15s}.pill:hover{background:#ffffff26}.pill.go{color:#fff;background:linear-gradient(135deg,#4f46e5,#0ea5e9);border-color:#0000;box-shadow:0 4px 14px #4f46e566}.pill.go:hover{background:linear-gradient(135deg,#5b53ff,#22b4f5);transform:translateY(-1px)}.codebody{font:14.5px/1.7 var(--font-mono);tab-size:4;margin:0;padding:14px 0;overflow-x:auto}.codebody .cl{white-space:pre;padding-right:18px;display:block}.codebody .ln{text-align:right;color:#5f5e8a;-webkit-user-select:none;user-select:none;width:46px;padding-right:16px;font-size:.85em;font-style:normal;display:inline-block}.codecard.output{background:#0a0a12;max-width:700px}.codecard.output .codebody{color:#b8f3c9;padding:12px 18px}.codecard.output .codebody .cl{padding-right:0}.codecard.shell .codebody{color:#f5d68a;padding:12px 18px}.codecard.shell .codebody .cl{padding-right:0}.codecard figcaption{color:#9b9ac4;padding:8px 16px 12px}.tk-k{color:#e19cff;font-weight:600}.tk-s{color:#8fe3b0}.tk-c{color:#7b7aa6;font-style:italic}.tk-n{color:#ffb066}.tk-f,.tk-b{color:#7cc4ff}.viewer-frame{background:var(--paper);border:0;width:100%;height:680px;display:block}.exercise{background:var(--card);border:1px solid var(--line);max-width:760px;box-shadow:var(--shadow);border-radius:18px;gap:16px;margin:1.6em auto;padding:20px;display:flex}.ex-num{min-width:52px;height:52px;font:700 1.05rem var(--font-head);color:#fff;background:linear-gradient(135deg, var(--indigo), var(--teal));border-radius:16px;flex:none;place-items:center;padding:0 8px;display:grid}.ex-body{flex:1;min-width:0}.ex-body>p{margin:0 0 8px}.ex-label{color:var(--indigo)}.ex-body .codecard{max-width:none;margin:12px 0}.reveal{font:600 .95rem var(--font-text);border:2px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer;border-radius:999px;margin-top:8px;padding:8px 18px;transition:all .15s}.reveal:hover,.reveal.on{border-color:var(--indigo);color:var(--indigo)}.answer-box{background:color-mix(in srgb, var(--green) 11%, var(--card));border:1px solid color-mix(in srgb, var(--green) 30%, var(--line));border-radius:12px;margin-top:12px;padding:12px 16px}.pager{grid-template-columns:1fr 1fr;gap:18px;max-width:1040px;margin:64px auto 0;display:grid}.pager-card{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);color:var(--ink);border-radius:18px;gap:2px;padding:20px 24px;text-decoration:none;transition:transform .2s,border-color .2s;display:grid}.pager-card:hover{border-color:var(--indigo);transform:translateY(-4px)}.pager-card span{color:var(--muted);font-size:.85rem;font-weight:600}.pager-card b{color:var(--indigo)}.pager-card em{font:italic 600 1.1rem var(--font-head)}.pager-card.next{text-align:right}.howto{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:30px 0 10px;display:grid}.howto>div{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:20px}.howto span{background:var(--indigo);width:34px;height:34px;color:var(--indigo-ink);border-radius:50%;place-items:center;margin-bottom:10px;font-weight:700;display:grid}.howto p{color:var(--muted);margin:6px 0 0;font-size:.96rem}.part-block{margin-top:38px}.part-title{color:var(--indigo);margin-bottom:14px;font-size:1.5rem}.chapter-list{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}.chapter-list a{background:var(--card);border:1px solid var(--line);color:var(--ink);border-radius:16px;align-items:center;gap:14px;padding:14px 16px;text-decoration:none;transition:transform .15s,border-color .15s;display:flex}.chapter-list a:hover{border-color:var(--indigo);transform:translateY(-3px)}.chapter-list .cn{background:color-mix(in srgb, var(--indigo) 12%, var(--card));width:44px;height:44px;color:var(--indigo);font:700 1.1rem var(--font-head);border-radius:13px;flex:none;place-items:center;display:grid}.chapter-list .ct{display:grid}.chapter-list em{color:var(--muted);font-size:.85rem;font-style:normal}@media (max-width:860px){.read-shell{grid-template-columns:minmax(0,1fr)}.toc{border-right:0;border-bottom:1px solid var(--line);height:auto;padding:8px 12px;position:static}.toc-toggle{display:inline-flex}.toc-nav{max-height:70vh;margin-top:8px;display:none;overflow:auto}.toc-nav.show{display:block}.hero-row{flex-direction:column;align-items:flex-start}.big-num{text-align:left}.pager{grid-template-columns:1fr}.pager-card.next{text-align:left}.exercise{flex-direction:column}.viewer-frame{height:1180px}.anchor{display:none}}@media (max-width:560px){body{font-size:16px}.prose{font-size:1.04rem}.viewer-frame{height:1260px}}.callout-icon img{width:28px;height:28px;display:block}.h-icon{vertical-align:-6px;margin-right:10px}.site-header nav a.btn{background:var(--indigo);padding:8px 18px;color:var(--indigo-ink)!important}.site-header nav a.btn:hover{background:var(--indigo)}.callout-icon{font-size:1.55rem}.landing-inner.solo{text-align:center;max-width:820px;display:block}.landing-inner.solo .lead{margin-left:auto;margin-right:auto}.landing-inner.solo .facts{justify-content:center}.landing{padding:30px 22px 56px}.obook{--w:min(400px, max(340px, calc((100svh - 300px) / 1.511)), 44vw);--h:calc(var(--w) * 1.5111);--dur:1.6s;text-align:center;max-width:1140px;margin:14px auto 0;position:relative}.obook-stage{width:calc(var(--w) * 2);height:calc(var(--h) + 24px);cursor:pointer;margin:0 auto;padding-top:12px;position:relative}.obook-shift{perspective:2600px;transition:transform var(--dur) cubic-bezier(.45, .05, .25, 1);position:absolute;inset:12px 0;transform:translate(-25%)}.obook[data-open=true] .obook-shift{transform:none}.obook-book{width:var(--w);height:var(--h);transform-style:preserve-3d;transition:transform var(--dur) cubic-bezier(.45, .05, .25, 1);position:absolute;top:0;left:50%;transform:rotateY(20deg)rotateX(4deg)}.obook[data-open=true] .obook-book{transform:none}.obook-spine{height:100%;width:calc(var(--w) * .169);transform-origin:0;border-radius:2px;transition:opacity .5s;position:absolute;top:0;left:0;overflow:hidden;transform:rotateY(90deg)}.obook[data-open=true] .obook-spine{opacity:0}.obook-spine img{width:100%;max-width:none;height:100%;display:block}.obook-cover{transform-origin:0;transform-style:preserve-3d;transition:transform var(--dur) cubic-bezier(.55, .02, .2, 1);position:absolute;inset:0;transform:translateZ(1px)}.obook[data-open=true] .obook-cover{transform:translateZ(1px)rotateY(-180deg)}.obook-face{backface-visibility:hidden;position:absolute;inset:0}.obook-front{border-radius:2px 8px 8px 2px;overflow:hidden;box-shadow:0 34px 50px -22px #0000008c,0 10px 18px -8px #00000059}.obook-front img{width:100%;max-width:none;height:100%;display:block}.obook-front:after{content:"";pointer-events:none;background:linear-gradient(90deg,#00000059,#ffffff24 2.5%,#0000 6% 92%,#0000002e);position:absolute;inset:0}.obook-back{transform:rotateY(180deg)}.obook-page{color:#26233a;padding:calc(var(--w) * .1) calc(var(--w) * .095);text-align:left;font-family:var(--font-text);background:#fbf7ec;overflow:hidden}.obook-right{background:linear-gradient(90deg,#3c280a38,#3c280a0f 4%,#0000 11%),linear-gradient(#0000 94%,#00000008),#fbf7ec;border-radius:0 6px 6px 0;position:absolute;inset:0;box-shadow:1px 1px #e7dfca,2px 2px #fbf7ec,3px 3px #ddd4bd,4px 4px #fbf7ec,5px 5px #d3c9b0,0 34px 50px -22px #00000080}.obook-left{background:linear-gradient(270deg,#3c280a3d,#3c280a0f 5%,#0000 13%),linear-gradient(#0000 94%,#00000008),#f6f0df;border-radius:6px 0 0 6px;flex-direction:column;justify-content:center;display:flex;box-shadow:-1px 1px #e7dfca,-3px 3px #ddd4bd,-5px 5px #d3c9b0,0 34px 50px -22px #00000080}.obook-right h2{color:#1d1b33;margin:0 0 14px;font-size:1.55rem}.obook-right ul{gap:11px;margin:0;padding:0;list-style:none;display:grid}.obook-right li{padding-left:20px;font-size:14.5px;line-height:1.42;position:relative}.obook-right li:before{content:"›";font:700 17px/1.2 var(--font-mono);color:#c98a05;position:absolute;top:-1px;left:2px}.obook-folio{color:#6b6780;margin:16px 0 0;font-size:14px;font-style:italic}.obook-intro-m{display:none}.obook-kicker{font:700 .74rem/1 var(--font-text);letter-spacing:.16em;text-transform:uppercase;color:#c98a05;margin:0 0 12px}.obook-welcome{font:600 1.55rem/1.2 var(--font-head);color:#1d1b33;margin:0}.obook-left hr{border:0;border-top:2px solid #f2c230;width:44px;margin:22px 0 18px}.obook-title{font:700 1.15rem/1.25 var(--font-head);color:#1d1b33;margin:0}.obook-sub{color:#55516b;margin:4px 0 18px;font-size:14.5px;line-height:1.4}.obook-by{color:#26233a;gap:2px;margin:0;font-size:14.5px;font-weight:600;display:grid}.obook-controls{justify-content:center;align-items:center;margin-top:30px}.obook-replay{color:var(--muted);font:600 .95rem var(--font-text);cursor:pointer;text-underline-offset:3px;background:0 0;border:0;padding:10px 12px;text-decoration:underline}.obook-replay:hover{color:var(--ink)}.obook .facts{justify-content:center}.landing .landing-copy h1{font-size:clamp(2.1rem,4.4vw,3.4rem)}@media (max-width:799px){.obook{--w:min(420px, 90vw)}.obook-stage{width:var(--w)}.obook-shift{transform:none}.obook-book{left:0;transform:rotateY(14deg)rotateX(3deg)}.obook[data-open=true] .obook-cover{opacity:0;visibility:hidden;transition:transform var(--dur) cubic-bezier(.55, .02, .2, 1), opacity .5s ease calc(var(--dur) - .7s), visibility 0s linear var(--dur);transform:translateZ(1px)rotateY(-165deg)}.obook-right{padding:6.5% 7% 4% 9%}.obook-right h2{margin-bottom:10px;font-size:1.35rem}.obook-right ul{gap:9px}.obook-intro-m{font:600 1.05rem/1.25 var(--font-head);color:#1d1b33;margin:0 0 12px;display:block}.obook-folio{margin-top:12px}}@media (prefers-reduced-motion:reduce){.obook{--dur:10ms}.obook-shift,.obook-book,.obook-cover,.obook-spine{transition:none!important}}
