:root{--orange:#ff4d00;--glow:#fcddcc;--ink:#262626;--muted:#727272;--line:#e5e7eb;--vellum:#f9f9f9;--white:#fff;--max:1200px;--sans:Inter,"Segoe UI",Arial,sans-serif;--mono:"Cascadia Mono",Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:var(--sans);font-size:15px;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.wrap{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.site-header{height:66px;position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);backdrop-filter:blur(14px)}.header-inner{height:100%;display:flex;align-items:center;gap:34px}.brand{display:inline-flex;align-items:center;gap:11px;font-size:18px;font-weight:700;letter-spacing:-.03em}.brand>span:last-child>span{color:var(--orange)}.brand-mark{width:29px;height:29px;position:relative;display:grid;place-items:center}.brand-mark i{position:absolute;width:22px;height:4px;border-radius:9px;background:var(--orange);transform-origin:center}.brand-mark i:first-child{transform:rotate(0)}.brand-mark i:nth-child(2){transform:rotate(60deg)}.brand-mark i:nth-child(3){transform:rotate(-60deg)}.desktop-nav{display:flex;align-items:center;gap:28px;margin:auto;font-size:14px;font-weight:500}.desktop-nav a,.footer-links a{transition:color .2s}.desktop-nav a:hover,.footer-links a:hover{color:var(--orange)}.header-search{display:flex;align-items:center;gap:14px;padding:9px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;font-weight:600}.header-search span{color:var(--orange);font-size:18px}.menu-button,.mobile-nav{display:none}.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}.hero-grid{position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:42px 42px;opacity:.42;mask-image:linear-gradient(to bottom,#000,transparent 82%)}.hero-inner{position:relative;z-index:1;padding:105px 0 92px;text-align:center}.eyebrow{display:flex;align-items:center;justify-content:center;gap:9px;margin-bottom:26px;color:var(--muted);font:12px var(--mono);text-transform:uppercase;letter-spacing:.08em}.eyebrow span{width:6px;height:6px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px var(--glow)}h1{max-width:940px;margin:0 auto;font-size:clamp(46px,6vw,76px);line-height:.99;letter-spacing:-.055em;font-weight:600}h1 em{color:var(--orange);font-style:normal}.hero-copy{max-width:660px;margin:28px auto 36px;color:var(--muted);font-size:17px;line-height:1.65}.search{position:relative;max-width:760px;margin:0 auto;text-align:left}.search input{width:100%;height:64px;padding:0 92px 0 56px;border:1px solid #d9d9d9;border-radius:999px;background:#fff;box-shadow:0 0 0 7px rgba(249,249,249,.9),0 18px 50px rgba(0,0,0,.05);font:15px var(--sans);outline:none}.search input:focus{border-color:var(--orange);box-shadow:0 0 0 7px var(--glow),0 18px 50px rgba(0,0,0,.06)}.search-symbol{position:absolute;z-index:2;left:21px;top:16px;color:var(--orange);font-size:27px}.search-hint{position:absolute;right:17px;top:19px;padding:5px 9px;border:1px solid var(--line);border-radius:7px;background:var(--vellum);color:#949494;font:11px var(--mono)}.search-results{display:none;position:absolute;z-index:20;top:75px;left:0;right:0;max-height:360px;overflow:auto;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 24px 60px rgba(0,0,0,.1)}.search-results.open{display:block}.search-item{display:block;padding:15px 20px;border-bottom:1px solid var(--line)}.search-item:last-child{border:0}.search-item:hover,.search-item.active{background:var(--vellum)}.search-item strong{display:block;margin-bottom:4px}.search-item span{color:var(--muted);font-size:12px}.search-empty{padding:24px;text-align:center;color:var(--muted)}.quick-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 16px;margin-top:27px;color:var(--muted);font-size:13px}.quick-links a{font-family:var(--mono);color:var(--ink);border-bottom:1px solid #ccc}.quick-links a:hover{color:var(--orange);border-color:var(--orange)}.topic-section,.principles{padding-top:96px;padding-bottom:100px}.section-heading{margin-bottom:34px}.section-heading>div:first-child,.section-heading>div>div:first-child{margin-bottom:14px;color:var(--muted);font:12px var(--mono);text-transform:uppercase;letter-spacing:.06em}.index{color:var(--orange)}.section-heading h2{margin:0 0 10px;font-size:clamp(34px,4vw,52px);font-weight:600;letter-spacing:-.045em}.section-heading>p{margin:0;color:var(--muted);line-height:1.6}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.topic{position:relative;min-height:190px;padding:25px;display:flex;flex-direction:column;justify-content:space-between;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .2s}.topic:hover{background:var(--vellum)}.topic-wide{grid-column:span 2}.topic-code{display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--orange);font:600 11px var(--mono)}.topic h3{margin:25px 0 7px;font-size:17px}.topic p{margin:0;max-width:290px;color:var(--muted);font-size:13px;line-height:1.45}.topic b{position:absolute;right:23px;top:25px;font-size:20px;font-weight:400;transition:transform .2s}.topic:hover b{transform:translate(3px,-3px);color:var(--orange)}.popular-section{padding:96px 0;background:var(--vellum);border-block:1px solid var(--line)}.heading-row{display:flex;align-items:end;justify-content:space-between}.refresh{padding:10px 15px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font:600 12px var(--mono);cursor:pointer}.refresh:hover{border-color:var(--orange);color:var(--orange)}.article-list{border-top:1px solid var(--line)}.article-row{display:grid;grid-template-columns:70px 1fr 40px;align-items:center;min-height:145px;padding:22px 0;border-bottom:1px solid var(--line)}.article-row:hover h3{color:var(--orange)}.article-number{color:#b5b5b5;font:12px var(--mono)}.article-tag{font:11px var(--mono);color:var(--orange);text-transform:uppercase;letter-spacing:.06em}.article-row h3{margin:8px 0 6px;font-size:21px;font-weight:600;letter-spacing:-.02em;transition:color .2s}.article-row p{margin:0;color:var(--muted);line-height:1.5}.row-arrow{font-size:22px;justify-self:end}.all-link{display:flex;align-items:center;justify-content:space-between;margin-top:26px;padding:20px 24px;border-radius:12px;background:var(--orange);color:#fff;font-weight:600;box-shadow:0 0 0 6px var(--glow)}.principles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.principles-grid article{padding:28px;border:1px solid var(--line);border-radius:16px;background:#fff}.principles-grid article>span{display:block;color:var(--orange);font:12px var(--mono)}.principles-grid h3{margin:38px 0 10px;font-size:19px}.principles-grid p{margin:0;color:var(--muted);line-height:1.6}footer{border-top:1px solid var(--line);background:var(--vellum)}.footer-main{display:flex;justify-content:space-between;gap:40px;padding-top:58px;padding-bottom:55px}.footer-brand{margin-bottom:13px}.footer-main p{margin:0;color:var(--muted)}.footer-links{display:grid;grid-template-columns:repeat(2,auto);gap:14px 42px;font-size:14px}.footer-bottom{display:flex;justify-content:space-between;padding-top:20px;padding-bottom:24px;border-top:1px solid var(--line);color:var(--muted);font:11px var(--mono)}@media(max-width:900px){.desktop-nav,.header-search{display:none}.menu-button{display:block;margin-left:auto;border:0;background:none;font-weight:600}.mobile-nav.open{display:grid;padding:16px 20px;gap:14px;border-top:1px solid var(--line);background:#fff}.hero-inner{padding:82px 0 72px}.topic-grid{grid-template-columns:repeat(2,1fr)}.topic-wide{grid-column:span 2}.principles-grid{grid-template-columns:1fr}.heading-row{align-items:flex-start;gap:20px}}@media(max-width:600px){.wrap{width:min(calc(100% - 28px),var(--max))}.hero-inner{padding:66px 0 58px}h1{font-size:42px}.hero-copy{font-size:15px}.search input{height:58px;padding-right:20px}.search-hint{display:none}.quick-links span{width:100%}.topic-section,.principles,.popular-section{padding-top:68px;padding-bottom:70px}.topic-grid{grid-template-columns:1fr}.topic-wide{grid-column:auto}.topic{min-height:165px}.heading-row{display:block}.refresh{margin-top:18px}.article-row{grid-template-columns:38px 1fr 24px;min-height:138px}.article-row h3{font-size:17px}.article-row p{font-size:13px}.footer-main{display:block}.footer-links{margin-top:34px;grid-template-columns:1fr 1fr}.footer-bottom{font-size:10px}}