:root{--ink:#14231f;--night:#0f1c19;--bg:#eef2f0;--surface:#fff;--tint:#e3ebe7;--muted:#4a5a55;--rule:#c9d3cf;--green:#0b6e4f;--green-dark:#08523b;--lime:#d4ec5a;--berry:#a3195b;--sans:"Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;--serif:Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;--mono:ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;--gutter:clamp(16px, 4vw, 40px);--radius:12px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--serif);margin:0;font-size:1.125rem;line-height:1.65}img{max-width:100%;height:auto;display:block}a{color:var(--green);text-underline-offset:3px;text-decoration-thickness:2px}a:hover{color:var(--green-dark)}:focus-visible{outline:3px solid var(--berry);outline-offset:3px}h1,h2,h3{font-family:var(--sans);letter-spacing:-.02em;margin:0 0 .5em;line-height:1.15}h1{font-size:clamp(2.1rem,1.4rem + 3.2vw,3.6rem);font-weight:800}h2{font-size:clamp(1.5rem,1.2rem + 1.2vw,2.1rem);font-weight:800}h3{font-size:1.25rem;font-weight:700}p{margin:0 0 1em}.wrap{max-width:1180px;padding:0 var(--gutter);margin:0 auto}.label{font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 .6em;font-size:.8rem}.skip{background:var(--lime);color:var(--ink);font-family:var(--sans);z-index:10;padding:10px 16px;font-weight:700;position:absolute;top:0;left:-9999px}.skip:focus{top:12px;left:16px}.masthead{background:var(--surface);border-bottom:1px solid var(--rule)}.masthead__row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 24px;padding-top:12px;padding-bottom:12px;display:flex}.brand{color:var(--ink);font-family:var(--sans);letter-spacing:-.01em;align-items:center;gap:10px;min-height:44px;font-size:1.15rem;text-decoration:none;display:inline-flex}.brand b{color:var(--green)}.nav{font-family:var(--sans);flex-wrap:wrap;gap:4px 6px;margin:0;padding:0;font-size:.98rem;list-style:none;display:flex}.nav a{min-height:44px;color:var(--ink);border-radius:8px;align-items:center;padding:0 10px;text-decoration:none;display:inline-flex}.nav a:hover{background:var(--tint)}.nav a[aria-current=page]{background:var(--ink);color:#fff}.hero{background:var(--night);color:#f2f6f4}.hero__grid{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);align-items:center;gap:40px;padding-top:clamp(40px,6vw,88px);padding-bottom:clamp(40px,6vw,88px);display:grid}.hero .label{color:var(--lime)}.hero h1{color:#fff}.hero h1 mark{color:var(--lime);background:0 0}.hero__lede{color:#d5e0dc;max-width:34em;font-size:1.2rem}.hero__img{border-radius:var(--radius);border:1px solid #2c3f3a}.hero figcaption{font-family:var(--sans);color:#b7c7c1;margin-top:10px;font-size:.9rem}.actions{flex-wrap:wrap;gap:12px;margin-top:24px;display:flex}.btn{min-height:48px;font-family:var(--sans);border-radius:999px;align-items:center;padding:0 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0}.section--tint{background:var(--tint)}.section__head{max-width:46rem;margin-bottom:32px}.marker{background:linear-gradient(transparent 62%, var(--lime) 62%);padding:0 2px}.track{border-top:2px solid var(--ink);margin:0;padding:0;list-style:none}.track li{border-bottom:1px solid var(--rule);grid-template-columns:5.5rem minmax(0,1fr) 200px;align-items:center;gap:24px;padding:26px 0;display:grid}.track__num{font-family:var(--mono);color:var(--berry);font-size:2.4rem;font-weight:700;line-height:1}.track h3{margin-bottom:.3em;font-size:clamp(1.2rem,1rem + .8vw,1.5rem)}.track h3 a{color:var(--ink);text-decoration:none}.track h3 a:hover{text-decoration:underline}.track p{color:var(--muted);margin:0}.track img{border:1px solid var(--rule);border-radius:10px}.split{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;display:grid}.principles{gap:14px;margin:0;padding:0;list-style:none;display:grid}.principles li{background:var(--surface);border-left:6px solid var(--green);border-radius:0 var(--radius) var(--radius) 0;padding:16px 20px}.principles strong{font-family:var(--sans);margin-bottom:4px;display:block}.panel{background:var(--ink);color:#e9f0ed;border-radius:var(--radius);padding:clamp(24px,4vw,40px)}.panel h2{color:#fff}.panel a,.panel .label{color:var(--lime)}.article-head{background:var(--surface);border-bottom:1px solid var(--rule)}.article-head__grid{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);align-items:center;gap:40px;padding-top:clamp(32px,5vw,64px);padding-bottom:clamp(32px,5vw,64px);display:grid}.article-head .lede{color:var(--muted);max-width:36em;font-size:1.2rem}.article-head img{border-radius:var(--radius);border:1px solid var(--rule)}.meta{font-family:var(--mono);color:var(--muted);font-size:.85rem}.article{grid-template-columns:240px minmax(0,1fr);gap:48px;padding-top:48px;padding-bottom:72px;display:grid}.toc{font-family:var(--sans);align-self:start;font-size:.95rem;position:sticky;top:16px}.toc ol{margin:0;padding-left:1.2em}.prose{max-width:42rem}.prose h2{margin-top:1.6em;font-size:clamp(1.4rem,1.2rem + .8vw,1.8rem)}.prose h2:first-child{margin-top:0}.prose ul,.prose ol{margin:0 0 1em;padding-left:1.3em}.prose li{margin-bottom:.4em}.callout{background:var(--surface);border:2px solid var(--ink);border-radius:var(--radius);box-shadow:6px 6px 0 var(--lime);margin:1.6em 0;padding:18px 22px}.callout p:last-child{margin-bottom:0}.callout .label{color:var(--berry)}.table-wrap{margin:0 0 1.4em;overflow-x:auto}table{border-collapse:collapse;width:100%;font-family:var(--sans);background:var(--surface);font-size:.95rem}th,td{text-align:left;vertical-align:top;border:1px solid var(--rule);padding:10px 12px}th{background:var(--tint)}.sources{background:var(--tint);border-radius:var(--radius);margin-top:2em;padding:18px 22px;font-size:1rem}.sources ul{margin:0;padding-left:1.2em}.next{font-family:var(--sans);margin-top:2em;font-weight:700}.cards{grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:24px;margin:0;padding:0;list-style:none;display:grid}.card{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);flex-direction:column;height:100%;display:flex;overflow:hidden}.card__body{padding:18px 20px 22px}.card h2{font-size:1.3rem}.card h2 a{color:var(--ink);text-decoration:none}.card h2 a:hover{text-decoration:underline}.card p{color:var(--muted);margin:0}.footer{background:var(--night);color:#cfdbd6;font-family:var(--sans);padding:48px 0 56px;font-size:.98rem}.footer__grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr) minmax(0,1fr);gap:32px;display:grid}.footer__name{color:#fff;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;display:flex}.footer__note{color:#9fb2ab;font-size:.92rem}.footer .label{color:var(--lime)}.footer ul{margin:0;padding:0;list-style:none}.footer li{margin-bottom:4px}.footer a{color:#e9f0ed;align-items:center;min-height:32px;display:inline-flex}.footer a:hover{color:var(--lime)}.notfound{padding:clamp(56px,10vw,120px) 0}.notfound .code{font-family:var(--mono);color:var(--berry);margin:0 0 12px;font-size:clamp(4rem,12vw,8rem);line-height:1}@media (width<=960px){.hero__grid,.article-head__grid,.split{grid-template-columns:minmax(0,1fr)}.channels ul{grid-template-columns:repeat(2,minmax(0,1fr))}.track li{grid-template-columns:4rem minmax(0,1fr)}.track img{display:none}.article{grid-template-columns:minmax(0,1fr);gap:24px}.toc{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);padding:14px 18px;position:static}.footer__grid{grid-template-columns:minmax(0,1fr)}}@media (width<=420px){body{font-size:1.0625rem}.channels ul{grid-template-columns:minmax(0,1fr)}.track li{grid-template-columns:minmax(0,1fr);gap:8px}.track__num{font-size:1.6rem}.brand{font-size:1.05rem}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.page-head{padding-top:clamp(32px,5vw,64px);padding-bottom:clamp(16px,3vw,32px)}.page-head .section__head{margin-bottom:0}.notfound li a{padding:3px 0;display:inline-block}.toc ol{padding-left:0;list-style:none}.toc li{margin-bottom:2px}.toc a{padding:4px 0;line-height:1.35;display:block}.prose .sources h2.label{font-family:var(--mono);letter-spacing:.08em;margin:0 0 .6em;font-size:.8rem}.notfound ul{line-height:1.5}