:root{color-scheme:dark;--ink:#eef5fb;--muted:#9eb1c3;--panel:#101b27;--line:#263b4d;--lime:#baff67;--blue:#8edcff;--night:#080d13}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 50% -10%,#173047 0,var(--night) 42%);color:var(--ink);font:16px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--lime)}
.site-header,.page,.site-footer{width:min(960px,calc(100% - 40px));margin-inline:auto}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px 0;border-bottom:1px solid var(--line)}
.brand{color:var(--ink);font-weight:850;letter-spacing:.1em;text-decoration:none}.brand span{color:var(--lime)}.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;margin-right:9px;border:1px solid var(--lime);color:var(--lime);font-size:14px}
.play-link,.primary-link{display:inline-block;border:1px solid var(--lime);background:var(--lime);color:#071009;font-weight:800;text-decoration:none;padding:9px 17px;letter-spacing:.03em}.play-link:hover,.primary-link:hover{background:transparent;color:var(--lime)}
.page{padding:30px 0 64px}
.breadcrumbs{font-size:.84rem;color:var(--muted);margin-bottom:35px}.breadcrumbs a{color:var(--muted)}
.hero{padding:12px 0 30px;border-bottom:1px solid var(--line)}
.eyebrow{margin:0 0 8px;color:var(--lime);font:700 .76rem/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.16em;text-transform:uppercase}
h1{max-width:820px;margin:.1em 0 .35em;font-size:clamp(2.25rem,7vw,4.4rem);line-height:1.02;letter-spacing:-.045em}
.dek{max-width:760px;margin:0;color:#c2d1dd;font-size:clamp(1.05rem,2.5vw,1.25rem)}
.byline{margin:17px 0 0;color:var(--muted);font-size:.88rem}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:56px;margin-top:36px}
article{min-width:0}article section{margin-bottom:34px}h2{margin:0 0 9px;font-size:clamp(1.35rem,3vw,1.75rem);line-height:1.25;letter-spacing:-.02em}p{margin:0 0 16px}ul,ol{margin:10px 0 18px;padding-left:1.35rem}li{margin:.45rem 0}strong{color:#fff}kbd,code{border:1px solid #3b5264;border-radius:3px;background:#172533;color:#fff;padding:.1em .38em;font:600 .88em ui-monospace,SFMono-Regular,Consolas,monospace}
.answer{border-left:3px solid var(--lime);padding:13px 17px;background:linear-gradient(90deg,rgba(186,255,103,.09),transparent);color:#dce8f1}
.formula{overflow-wrap:anywhere;border:1px solid var(--line);background:var(--panel);padding:18px 20px;font:700 clamp(.95rem,2.2vw,1.08rem)/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--lime)}
.sidebar{align-self:start;position:sticky;top:24px;border:1px solid var(--line);background:rgba(16,27,39,.8);padding:20px}.sidebar strong{display:block;margin-bottom:8px;font-size:.78rem;letter-spacing:.12em}.sidebar a{display:block;padding:5px 0;color:#bed0dd}.sidebar .primary-link{margin-top:15px;color:#071009;text-align:center}.sidebar .primary-link:hover{color:var(--lime)}
.next-guide{margin-top:40px;border:1px solid var(--line);padding:23px;background:linear-gradient(135deg,#112435,#101923)}.next-guide p{margin-bottom:8px}
.site-footer{display:flex;justify-content:space-between;gap:24px;padding:25px 0 40px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}.site-footer p{margin:0}.site-footer nav{display:flex;gap:18px;flex-wrap:wrap}.site-footer a{color:#c0d0dc}
@media(max-width:760px){.article-layout{grid-template-columns:1fr;gap:18px}.sidebar{position:static;order:-1}.sidebar a{display:inline-block;margin-right:14px}.site-footer{display:block}.site-footer nav{margin-top:10px}.site-header{padding:18px 0}.page{padding-top:22px}}
@media(max-width:440px){.site-header,.page,.site-footer{width:min(100% - 26px,960px)}.brand{letter-spacing:.05em}.brand-mark{display:none}.play-link{padding:8px 11px;font-size:.86rem}.breadcrumbs{margin-bottom:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}