:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#e8eef8;background:#0c1321;font-synthesis:none}*{box-sizing:border-box}body{margin:0}header{height:74px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #263348;padding:0 max(24px,calc((100vw - 1240px)/2));background:#111b2c}header a{color:#a9bde3;text-decoration:none;font-size:14px}.brand{display:flex;gap:12px;align-items:center}.brand strong,.brand small{display:block}.brand small{font-size:12px;color:#8192b0;margin-top:2px}.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:#6c7fff;color:white;font-weight:900;font-size:22px}main{max-width:1240px;padding:40px 24px 50px;margin:auto}.intro{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:30px}.intro h1{font-size:clamp(27px,4vw,42px);letter-spacing:-1.4px;margin:7px 0 8px}.intro p:not(.eyebrow){color:#a2b1c8;margin:0;max-width:640px;line-height:1.6}.eyebrow{color:#8b9bff;font-weight:750;letter-spacing:2px;font-size:11px}.intro-note{border:1px solid #30435d;color:#9cb1cc;border-radius:100px;padding:9px 14px;white-space:nowrap;font-size:12px}.workspace{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:18px}.panel{border:1px solid #2a3950;border-radius:16px;background:#131f30;overflow:hidden;min-width:0}.panel-top,.panel-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px}.panel-top{border-bottom:1px solid #2a3950}.panel-bottom{border-top:1px solid #2a3950}.muted,#save-status{color:#8599b5;font-size:12px}.actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.actions label{font-size:12px;color:#9eafc9}select,button{font:inherit;border-radius:8px;border:1px solid #354761;padding:9px 12px;background:#1c2b40;color:#e8eef8}button{cursor:pointer;font-size:13px;font-weight:650}button:hover{filter:brightness(1.15)}button:disabled{opacity:.6;cursor:wait}.primary{background:#7283ff;border-color:#7283ff;color:#fff}#code{width:100%;min-height:440px;resize:vertical;border:0;outline:0;background:#101a2a;color:#e3ebff;padding:22px;font:14px/1.75 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;tab-size:2}#output{min-height:228px;max-height:380px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:22px;color:#b9f5d1;font:14px/1.8 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.error{color:#ffb0b0!important}#status{color:#8da2c0;font-size:12px}.help{border-top:1px solid #2a3950;padding:20px;color:#9badc8;font-size:13px}.help strong{color:#e8eef8}.help p{margin:10px 0}.help code{background:#22344c;color:#d6e1ff;border-radius:4px;padding:2px 5px}.footer-note{font-size:12px;color:#879ab7;margin-top:22px;line-height:1.6}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(max-width:850px){.workspace{grid-template-columns:1fr}.intro{align-items:start;flex-direction:column}.intro-note{white-space:normal}main{padding:26px 14px}.panel-top,.panel-bottom{padding:13px}.panel-bottom{align-items:start;flex-direction:column}#code{min-height:310px}}

[hidden]{display:none!important}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;border-bottom:1px solid #2a3950;padding-bottom:12px}
.tab{background:transparent;border:1px solid transparent;color:#a9bde3;padding:10px 18px}
.tab.active{background:#26365c;color:#fff;border-color:#5266ad}
.learning-view{min-height:550px}
.section-heading{margin-bottom:26px}
.section-heading h1{font-size:clamp(28px,4vw,42px);margin:8px 0}
.section-heading p:not(.eyebrow){color:#a2b1c8;line-height:1.6}
.learn-layout{display:grid;grid-template-columns:minmax(230px,.34fr) minmax(0,.66fr);gap:18px}
.lesson-list{padding:10px;display:grid;gap:5px}
.lesson-link{width:100%;text-align:left;background:transparent;border-color:transparent;padding:13px}
.lesson-link.selected{background:#26365c;border-color:#5266ad}
.lesson-content{padding:24px;line-height:1.7}
.lesson-content h2,.doc-card h2{font-size:17px;margin:22px 0 10px}
.code-example{background:#0e1929;border:1px solid #30425b;border-radius:10px;padding:16px;color:#d6e1ff;white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
#docs-search{width:100%;max-width:560px;padding:13px 16px;background:#15243a;border:1px solid #354761;color:#e8eef8;border-radius:10px;margin-bottom:22px;font:inherit}
.docs-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:22px}
.doc-card{padding:20px}
.doc-card h2{margin-top:0}
.doc-card p{color:#a2b1c8;font-size:14px;line-height:1.6}
@media(max-width:850px){.learn-layout,.docs-grid{grid-template-columns:1fr}.lesson-content{padding:16px}.tabs{gap:4px}.tab{padding:9px 12px}}