:root{--ink:#48416A;--accent:#8D8AE8;--mint:#C0F0DE;--line:#DCCEF4;--pale:#F6F0FF;--coral:#E07A5F;--body:#37333e}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--body);font:17px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}h1,h2,h3,h4{color:var(--ink);line-height:1.17;letter-spacing:-.025em}h1{font-size:clamp(34px,3.7vw,52px);margin:14px 0 22px;max-width:850px}h2{font-size:32px;margin:0 0 18px}h3{font-size:23px;margin:24px 0 12px}h4{font-size:19px;margin:8px 0}p{margin:13px 0 20px}a{color:var(--ink);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,select{font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid var(--ink);outline-offset:4px}.wrap{max-width:1240px;margin:auto;padding:0 32px}.sitehead{border-bottom:1px solid var(--line)}.headinner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:18px;padding-bottom:18px}.brand{font-size:22px;font-weight:750;text-decoration:none}.headnav{display:flex;gap:22px;font-size:14px;font-weight:650;flex-wrap:wrap}.reviewbar{background:var(--pale);font-size:13px;padding:8px 0}.reviewbar .wrap{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}.eyebrow{font-size:12px;font-weight:750;letter-spacing:.09em;text-transform:uppercase;color:var(--ink)}.hero{padding:44px 0 32px}.crumb{font-size:14px;margin-bottom:24px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:44px;align-items:start}.lede{font-size:20px;max-width:760px}.purpose{background:var(--pale);border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:12px;padding:24px}.purpose h2{font-size:23px}.purpose p{font-size:15px;margin:14px 0}.purpose b{color:var(--ink)}.purpose hr{border:0;border-top:1px solid var(--line)}.btn{display:inline-block;background:var(--ink);color:white;border:1px solid var(--ink);padding:12px 20px;border-radius:6px;text-decoration:none;font-size:15px;font-weight:650}.btn.secondary{background:white;color:var(--ink)}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:23px}.flow{margin:20px 0 45px;border:1px solid var(--line);border-radius:12px;overflow:hidden}.flow-intro{padding:25px 28px 17px}.flow-intro h2{font-size:27px;margin:6px 0 10px}.flow-intro p{font-size:15px;max-width:850px}.tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-block:1px solid var(--line)}.tabs button{cursor:pointer;padding:17px 12px;background:#fff;border:0;border-right:1px solid var(--line);color:var(--ink);font-size:14px;font-weight:700;line-height:1.4}.tabs button:last-child{border-right:0}.tabs button[aria-selected=true]{background:var(--pale);box-shadow:inset 0 -3px var(--ink)}.tabs small{display:block;font-size:11px;font-weight:500;margin-top:7px}.panel{padding:28px;display:grid;grid-template-columns:1fr 1.1fr;gap:28px;align-items:start}.panel[hidden]{display:none}.panel h3{margin-top:0}.panel p{font-size:16px}.artifact{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}.artifact-title{background:var(--pale);padding:12px 18px;font-size:14px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}.artifact dl{margin:0;padding:5px 18px}.artifact dl div{display:grid;grid-template-columns:130px 1fr;gap:15px;border-bottom:1px solid var(--line);padding:12px 0;font-size:14px}.artifact dl div:last-child{border:0}.artifact dt{font-weight:700;color:var(--ink)}.artifact dd{margin:0}.article-layout{display:grid;grid-template-columns:235px minmax(0,820px);justify-content:space-between;gap:50px;align-items:start}.rail{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;border:1px solid var(--line);border-radius:10px;padding:19px;font-size:14px}.rail h2{font-size:19px}.rail a{display:block;padding:10px 0;text-decoration:none;border-bottom:1px solid var(--line);line-height:1.45}.rail a:hover{text-decoration:underline}.rail small{font-size:12px;color:#665e72}.rail details{margin-top:16px}.rail summary{cursor:pointer;font-weight:650;color:var(--ink)}.rail .chapter-ref{padding:7px 0;font-size:12px}.rail select{font-size:13px;width:100%;padding:10px;border:1px solid var(--line);background:white;color:var(--ink);border-radius:5px;margin-top:16px}.article section{padding:34px 0;border-bottom:1px solid var(--line);scroll-margin-top:18px}.article section:first-child{padding-top:0}.article .answer{font-size:19px;line-height:1.8}.article ol{padding-left:25px}.article li{margin:12px 0}.example{border-left:4px solid var(--accent);padding:20px 24px;background:var(--pale);border-radius:0 9px 9px 0;margin:26px 0}.example p{margin-bottom:0}.exercise{padding:20px 24px;border:1px solid var(--line);border-radius:9px;margin:24px 0}.exercise p{margin:8px 0}.check{background:var(--mint);padding:17px 21px;border-radius:8px;margin:20px 0;font-size:16px}.chapterlist{margin:22px 0;padding:0;list-style:none}.chapterlist li{border:1px solid var(--line);padding:15px 18px;border-radius:7px;margin:10px 0}.chapterlist a{display:block;font-weight:650;font-size:15px}.chapterlist small{font-size:12px;display:block;color:#625b6e;margin-top:5px}.tag{font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink)}.muted{font-size:14px;color:#625b6e}.video-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:25px 0}.video-copy{padding:20px}.video-copy h3{margin:5px 0 10px}.video-copy p{font-size:15px}.video-frame{aspect-ratio:16/9;background:var(--pale)}.video-frame iframe{width:100%;height:100%;border:0}.video-trigger{width:100%;height:100%;border:0;color:white;cursor:pointer;background:linear-gradient(0deg,rgba(30,25,45,.87),rgba(30,25,45,.25)),var(--thumb) center/cover;display:flex;align-items:center;justify-content:center;gap:12px;font-weight:700;font-size:20px}.video-trigger span{background:white;color:var(--ink);border-radius:50%;width:55px;height:55px;display:grid;place-items:center}.video-links{padding:10px 20px;font-size:13px}.next-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:25px 0}.next-card{border:1px solid var(--line);border-radius:10px;padding:22px}.next-card h3{font-size:21px;margin-top:9px}.next-card p{font-size:15px}.footer-cta{border:1px solid var(--line);background:var(--pale);border-radius:12px;padding:30px;margin:40px 0}.footer-cta h2{font-size:28px}.footer-cta p{max-width:760px}.sitefoot{border-top:1px solid var(--line);padding:25px 0;font-size:14px}.skip{position:absolute;left:-9999px}.skip:focus{left:15px;top:10px;background:white;z-index:9;padding:12px}.course-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:28px 0 45px}.course-card{padding:28px;border:1px solid var(--line);border-radius:12px}.course-card h2{font-size:26px;margin:12px 0}.course-card p{font-size:16px}.course-card .btn{margin-top:10px}.route-intro{max-width:850px}.overview-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:30px 0}.overview-steps a{padding:18px;border:1px solid var(--line);border-top:3px solid var(--accent);border-radius:7px;text-decoration:none;font-size:14px;font-weight:700}.faq details{border:1px solid var(--line);padding:18px 20px;border-radius:8px;margin:12px 0}.faq summary{font-weight:650;cursor:pointer;color:var(--ink)}.faq p{font-size:16px;margin-bottom:0}@media(max-width:1000px){.article-layout{grid-template-columns:210px minmax(0,1fr);gap:30px}.hero-grid{gap:25px;grid-template-columns:1.4fr 1fr}.tabs small{display:none}.wrap{padding:0 24px}}@media(max-width:760px){.hero-grid,.article-layout,.panel,.next-grid,.course-cards{grid-template-columns:1fr}.hero{padding-top:26px}.purpose{margin-top:12px}.rail{position:static;max-height:none}.rail>a,.rail>small{display:none}.rail h2{font-size:20px}.rail details{margin-top:5px}.tabs{display:flex;overflow-x:auto}.tabs button{flex:0 0 154px;min-height:65px}.flow-intro,.panel{padding:20px}.overview-steps{grid-template-columns:1fr 1fr}.headinner{align-items:flex-start}.headnav{gap:10px 16px;font-size:13px}.wrap{padding-left:20px;padding-right:20px}.lede{font-size:18px}h2{font-size:28px}.article .answer{font-size:18px}.artifact dl div{grid-template-columns:100px 1fr;gap:12px}.course-card{padding:23px}.flow{margin-bottom:28px}.footer-cta{padding:23px}.article section{padding:28px 0}}@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

.pattern-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}.pattern-card{border:1px solid var(--line);border-radius:10px;padding:22px}.pattern-card h3{margin-top:8px}.pattern-card p{font-size:15px}.pattern-card a{font-size:14px}.pattern-mini{padding:16px;background:var(--pale);border:1px solid var(--line);border-radius:7px;color:var(--ink);font-size:15px;line-height:1.8}.pattern-chain{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.pattern-chain span{border:1px solid var(--line);border-radius:6px;padding:10px 15px;background:white;color:var(--ink);font-size:14px}@media(max-width:760px){.pattern-grid{grid-template-columns:1fr}}