:root{--paper:#f8f6ef;--white:#fffef9;--ink:#253f35;--muted:#5b6b60;--orange:#b9502b;--line:#dedfd3;--sage:#e8eddf;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--radius:12px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:35px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--orange);outline-offset:5px}button{cursor:pointer}.wrap{width:min(1200px,calc(100% - 88px));margin:auto}.skip{position:fixed;left:16px;top:-100px;background:var(--white);padding:12px;z-index:100}.skip:focus{top:12px}.masthead{border-bottom:1px solid var(--line)}.topbar{display:flex;justify-content:space-between;align-items:center;min-height:92px;gap:20px}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-size:24px;font-weight:800;letter-spacing:-1.2px}.brand svg{width:39px;height:43px;color:var(--orange)}.brand .know{font-weight:450}.tagline{font-size:12px;color:var(--muted);letter-spacing:.02em}.top-actions{display:flex;align-items:center;gap:26px}.search-trigger{display:flex;align-items:center;gap:10px;background:none;border:1px solid #d3d8ca;border-radius:7px;color:var(--ink);padding:8px 13px;font-size:13px}.search-trigger svg{width:17px}.kbd{font-family:var(--mono);font-size:10px;color:var(--muted);border:1px solid var(--line);padding:0 5px;border-radius:3px}.menu-toggle{display:none}.nav-shell{border-top:1px solid var(--line)}.nav{display:flex;justify-content:space-between;gap:20px;padding:15px 0}.nav a{text-decoration:none;color:var(--muted);font-size:13px;font-weight:550;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--orange)}.nav a.active{box-shadow:0 2px var(--orange)}.eyebrow{text-transform:uppercase;letter-spacing:1.9px;font:11px/1.5 var(--mono);color:var(--muted);display:flex;align-items:center;gap:10px}.eyebrow:before{content:"";width:7px;height:7px;background:var(--orange);border-radius:50%}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(40px,4.6vw,66px);line-height:1.08;letter-spacing:-2.8px;font-weight:650}h2{font-size:30px;line-height:1.2;letter-spacing:-1px;font-weight:600}h3{font-size:20px;line-height:1.3;letter-spacing:-.4px;font-weight:600}.hero{padding:56px 0 50px;display:grid;grid-template-columns:1fr 1fr;gap:66px;align-items:center}.hero h1{margin:22px 0 23px;max-width:580px}.hero h1 em{font-style:normal;color:var(--orange)}.hero-copy>p{font-size:17px;line-height:1.8;max-width:460px;color:var(--muted)}.hero-art{position:relative}.hero-art img{width:100%;display:block;border-radius:12px}.art-note{position:absolute;bottom:0;left:20px;transform:translateY(50%);background:var(--white);border:1px solid var(--line);border-radius:6px;padding:9px 14px;font-size:11px;font-family:var(--mono);box-shadow:0 3px 0 #dce1d2}.button{display:inline-flex;align-items:center;gap:20px;background:var(--ink);color:white;text-decoration:none;border-radius:6px;padding:12px 19px;font-size:13px;font-weight:600;border:1px solid var(--ink)}.button:hover{background:#3a5949}.button.light{background:var(--white);color:var(--ink);border-color:var(--line)}.hero-links{display:flex;gap:24px;align-items:center;margin-top:27px;flex-wrap:wrap}.text-link{font-size:13px;font-weight:600}.small-note{margin:22px 0 0;color:var(--muted);font:11px/1.5 var(--mono)}.learning-strip{margin-top:10px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:21px 0;display:flex;gap:28px;align-items:center}.strip-label{font:11px/1.5 var(--mono);color:var(--orange);min-width:140px}.strip-steps{display:flex;align-items:center;justify-content:space-between;gap:24px;flex:1}.strip-steps a{font-size:12px;text-decoration:none;display:flex;gap:12px;align-items:center}.strip-steps b{font:11px var(--mono);color:var(--muted);border:1px solid var(--line);border-radius:50%;height:26px;width:26px;display:grid;place-items:center}.section{padding:57px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:27px}.section-head h2{margin:9px 0 0}.section-head p{font-size:13px;color:var(--muted);margin:0;max-width:300px}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.topic-card{position:relative;display:flex;flex-direction:column;min-height:235px;padding:23px;border:1px solid var(--line);border-radius:9px;background:var(--white);text-decoration:none;transition:transform .15s,border-color .15s}.topic-card:hover{transform:translateY(-4px);border-color:#9ea995}.topic-icon{height:40px;display:flex;align-items:center;margin-bottom:20px}.topic-icon svg{width:37px;height:37px;stroke:var(--orange);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.topic-card:nth-child(3n+2) svg{stroke:#587660}.topic-card h3{font-size:18px;margin-bottom:9px}.topic-card p{font-size:12px;line-height:1.75;color:var(--muted);margin:0 0 15px}.card-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font:10px var(--mono);color:var(--muted)}.card-bottom .arrow{font-size:19px;color:var(--ink)}.build-banner{display:grid;grid-template-columns:1fr 1fr;gap:50px;background:var(--sage);border-radius:12px;padding:38px 42px;margin:3px 0 60px;align-items:center}.build-banner h2{margin:10px 0 15px}.build-banner p{font-size:14px;color:var(--muted);max-width:400px}.project-list{display:grid;gap:0}.project-list a{display:grid;grid-template-columns:38px 1fr 20px;gap:10px;align-items:center;text-decoration:none;padding:15px 0;border-bottom:1px solid #cbd4c4;font-size:14px}.project-list a:last-child{border-bottom:0}.project-list span{font:11px var(--mono);color:var(--muted)}.footer{border-top:1px solid var(--line);padding:30px 0}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px}.footer .brand{font-size:19px}.footer .brand svg{width:29px;height:33px}.footer p{margin:0;color:var(--muted);font-size:12px}.footer-links{display:flex;gap:23px;font-size:12px}.breadcrumb{display:flex;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:30px 0}.breadcrumb a{text-decoration:none}.page-header{padding:14px 0 35px;max-width:850px}.page-header h1{font-size:clamp(35px,4vw,53px);line-height:1.15;margin:16px 0 18px}.page-header .lead{font-size:18px;color:var(--muted);max-width:700px;line-height:1.7}.article-layout{display:grid;grid-template-columns:220px minmax(0,1fr) 165px;gap:42px;padding:8px 0 70px;align-items:start}.sidebar{position:sticky;top:25px;border-right:1px solid var(--line);padding-right:20px}.sidebar-label{font:10px var(--mono);letter-spacing:1.5px;color:var(--muted);text-transform:uppercase;margin-bottom:18px}.sidebar a{display:block;text-decoration:none;font-size:12px;padding:9px 10px;margin-bottom:4px;border-radius:5px;line-height:1.5;color:var(--muted)}.sidebar a.current{background:#e8eddf;color:var(--ink);font-weight:650}.sidebar a:hover{color:var(--orange)}.article{min-width:0;color:#3b4c41;font-size:15px;line-height:1.85}.article h2{font-size:25px;color:var(--ink);margin:36px 0 16px;scroll-margin-top:24px}.article>h2:first-child{margin-top:0}.article h3{font-size:19px;margin:25px 0 12px}.article p{margin-bottom:20px}.article li{margin-bottom:9px}.article a{color:#a84424}.article ul,.article ol{padding-left:23px}.article strong{font-weight:650;color:var(--ink)}.article blockquote{margin:24px 0;padding:18px 22px;background:var(--sage);border-left:3px solid #6a8268;border-radius:0 7px 7px 0}.article blockquote p:last-child{margin:0}.table-scroll{overflow:auto;margin:25px 0;border:1px solid var(--line);border-radius:8px}.article table{width:100%;border-collapse:collapse;line-height:1.6;font-size:12px;min-width:420px}.article th{text-align:left;color:var(--ink);background:var(--sage);font-weight:650}.article td,.article th{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:top}.article tr:last-child td{border-bottom:0}.toc{position:sticky;top:25px;border-left:1px solid var(--line);padding-left:18px}.toc a{font-size:11px;line-height:1.6;color:var(--muted);display:block;margin:13px 0;text-decoration:none}.toc a:hover{color:var(--orange)}.article-tail{border-top:1px solid var(--line);margin-top:35px;padding-top:23px;font:11px/1.7 var(--mono);color:var(--muted)}.section-intro{background:var(--sage);padding:25px;border-radius:8px;margin-bottom:24px}.section-intro .eyebrow{margin-bottom:10px}.search-dialog{border:1px solid var(--line);border-radius:13px;background:var(--paper);color:var(--ink);padding:0;width:min(650px,calc(100% - 32px));max-height:80vh;box-shadow:0 30px 100px #14251a40}.search-dialog::backdrop{background:#14251a80;backdrop-filter:blur(3px)}.search-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line)}.search-head input{min-width:0;flex:1;border:0;background:transparent;color:var(--ink);padding:8px;outline-offset:1px}.close-search{border:1px solid var(--line);background:var(--white);border-radius:4px;padding:4px 9px;color:var(--ink);font-size:12px}.results{padding:10px 20px 20px;overflow:auto;max-height:55vh}.results a{display:block;padding:13px 5px;border-bottom:1px solid var(--line);text-decoration:none}.results strong{display:block;font-size:15px}.results span{font-size:12px;color:var(--muted)}.results p{font-size:13px;color:var(--muted);margin:15px 0}.result-count{padding:0 20px 18px;font:10px var(--mono);color:var(--muted)}[hidden]{display:none!important}@media(min-width:1500px){.hero{padding-top:75px;padding-bottom:70px}}@media(max-width:1100px){.tagline{display:none}.article-layout{grid-template-columns:190px minmax(0,1fr);gap:30px}.toc{display:none}.hero{gap:30px}.topic-grid{grid-template-columns:repeat(4,1fr)}.topic-card{padding:18px}.strip-steps{gap:15px}.nav{gap:13px}.nav a{font-size:12px}}@media(max-width:800px){.wrap{width:calc(100% - 40px)}.topbar{min-height:76px}.brand{font-size:22px}.top-actions{gap:10px}.kbd,.search-label{display:none}.search-trigger{padding:9px}.menu-toggle{display:block;border:1px solid var(--line);border-radius:6px;padding:6px 11px;background:transparent;font-size:12px;color:var(--ink)}.nav{display:none;grid-template-columns:1fr 1fr;gap:0;padding:10px 0}.nav.is-open{display:grid}.nav a{padding:11px;font-size:14px}.nav a.active{box-shadow:none;background:var(--sage);border-radius:5px}.hero{grid-template-columns:1fr;padding-top:35px;gap:35px}.hero h1{font-size:52px;max-width:550px}.hero-art{max-width:560px}.hero-copy>p{max-width:550px}.learning-strip{align-items:start;gap:18px;flex-direction:column}.strip-steps{width:100%;flex-wrap:wrap;gap:18px}.topic-grid{grid-template-columns:repeat(2,1fr)}.section-head{align-items:start;flex-direction:column}.section-head p{max-width:500px}.build-banner{padding:28px;grid-template-columns:1fr;gap:15px}.footer-inner{align-items:start;flex-direction:column;gap:14px}.article-layout{grid-template-columns:1fr}.sidebar{position:static;border-right:0;border-bottom:1px solid var(--line);padding:0 0 18px;display:flex;flex-wrap:wrap;gap:4px}.sidebar-label{width:100%;margin-bottom:7px}.sidebar a{margin:0;font-size:11px;padding:6px 9px}.article{font-size:15px}.page-header h1{letter-spacing:-1.6px}.page-header{padding-bottom:23px}.breadcrumb{margin-top:22px}.section{padding:40px 0}}@media(max-width:400px){.hero h1{font-size:44px}.topic-grid{gap:10px}.topic-card{padding:15px}.topic-card h3{font-size:16px}.brand{font-size:20px}.brand svg{width:30px}.hero-links{gap:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{header,.sidebar,.toc,.footer,.search-dialog{display:none}.wrap{width:100%}.article-layout{display:block}.page-header h1{font-size:30px}}

.sr-label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.contact-section{border-top:1px solid var(--line);padding-top:38px;margin-bottom:20px}.contact-section h2{margin:10px 0 15px}.contact-section p{color:var(--muted);max-width:560px;font-size:14px}.contact-email{display:inline-block;font-size:clamp(16px,3vw,22px);overflow-wrap:anywhere}

/* Method animation previews and accessible playback dialog. */
.video-preview{display:block;position:relative;width:100px;max-width:100%;margin-top:10px;border:1px solid var(--line);border-radius:10px;overflow:hidden;text-decoration:none;background:var(--ink)}.video-preview img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}.video-play{position:absolute;left:50%;top:42%;transform:translate(-50%,-50%);display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--ink);color:var(--white);box-shadow:0 2px 16px #0003;font-size:12px;padding-left:2px;transition:background .15s}.video-preview:hover .video-play,.video-preview:focus-visible .video-play{background:var(--orange)}.video-preview-caption{display:flex;justify-content:space-between;gap:12px;padding:7px 8px;color:var(--white);font-size:10px;line-height:1.4}.video-preview-caption span{white-space:nowrap}.video-pending{font-size:13px;color:var(--muted)}.method-video-dialog{position:fixed;inset:0;box-sizing:border-box;width:100vw;max-width:none;height:100dvh;max-height:none;margin:0;padding:0;border:0;border-radius:0;background:#101813;color:var(--white);overflow:hidden}.method-video-dialog[open]{display:grid;grid-template-rows:auto minmax(0,1fr) auto}.method-video-dialog::backdrop{background:#101813}.method-video-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px}.method-video-header h2{margin:0;font-size:20px;color:var(--white)}.close-video{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;border:1px solid #ffffff60;border-radius:50%;padding:0;background:#ffffff12;color:var(--white);font-size:32px;line-height:1}.close-video:hover{background:#ffffff30}.method-video-dialog video{display:block;width:100%;height:100%;min-height:0;object-fit:contain;background:#101813}.method-video-dialog>p{display:none}.method-video-dialog:not([open]){display:none}@media(max-width:600px){.video-preview-caption{font-size:11px;padding:8px;flex-wrap:wrap;gap:4px}.video-play{width:28px;height:28px;font-size:15px}.method-video-header{padding:12px}.method-video-header h2{font-size:16px}}

.video-preview .video-preview-caption{justify-content:center;padding:5px;font-size:10px}.video-preview .video-preview-caption>span{display:none}.video-preview .video-play{width:28px;height:28px;font-size:12px}

.method-video-stage{position:relative;min-width:0;min-height:0;overflow:hidden}.method-video-stage video{width:100%;height:100%;object-fit:contain}.method-video-start{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);min-height:48px;padding:12px 20px;border:1px solid #ffffff80;border-radius:28px;background:#253f35ee;color:#fffef9;font-size:17px;white-space:nowrap}.method-video-start[hidden]{display:none}.method-video-footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 20px;padding:8px 20px max(10px,env(safe-area-inset-bottom));font-size:13px;color:#fffef9}.method-video-status{margin:0;color:#fffef9;font-size:13px}.method-video-status:empty{display:none}.method-video-direct{color:#fffef9}.method-video-header{padding-top:max(16px,env(safe-area-inset-top));padding-right:max(20px,env(safe-area-inset-right))}
@media(max-width:360px){.topbar{gap:8px}.brand{font-size:18px;gap:8px}.brand svg{width:26px}.top-actions{gap:6px}}

.privacy-article{max-width:820px;margin:0 auto;padding-bottom:70px}.privacy-article h2{margin-top:32px}.footer-links{flex-wrap:wrap}
.hero-art picture{display:block}.hero-art img{height:auto}
@media(max-width:600px){.hero-art .art-note{position:static;display:table;margin:12px auto 0;transform:none}}