*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:#fff;color:#1a1a1a;font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:#1a1a1a}
.topbar{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid #f0f0f0;z-index:10}
.topbar-inner{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.brand{font-size:1.05rem;font-weight:700;letter-spacing:-0.02em;color:#1a1a1a;text-decoration:none}
.topnav{display:flex;gap:18px;align-items:center}
.navlink{color:#6b6b6b;font-size:.875rem;font-weight:500;text-decoration:none}
.navlink:hover{color:#1a1a1a}
.navlink.active{color:#1a1a1a;font-weight:600}
.layout{max-width:1080px;margin:0 auto;padding:40px 20px 72px;display:grid;grid-template-columns:220px 1fr;gap:48px}
aside{position:sticky;top:76px;align-self:start;max-height:calc(100vh - 96px);overflow:auto}
aside h3{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:#9a9a9a;margin:0 0 10px;font-weight:600}
.sidenav a{display:block;color:#6b6b6b;text-decoration:none;font-size:.875rem;padding:5px 0;line-height:1.4}
.sidenav a:hover{color:#1a1a1a}
.sidenav a.active{color:#1a1a1a;font-weight:600}
.sidenav .group{margin-bottom:18px}
article{min-width:0}
h1{font-size:2.2rem;font-weight:700;letter-spacing:-0.03em;line-height:1.15;margin:0 0 10px;color:#1a1a1a}
.lede{color:#6b6b6b;font-size:1.08rem;margin:0 0 32px;max-width:640px}
h2{font-size:1.35rem;font-weight:700;letter-spacing:-0.02em;line-height:1.3;margin:2.4em 0 .7em;color:#1a1a1a}
h3{font-size:1.05rem;font-weight:700;line-height:1.35;margin:1.8em 0 .5em;color:#1a1a1a}
p{margin:0 0 1.1em;color:#374151}
ul,ol{margin:0 0 1.15em;padding-left:1.3em;color:#374151}
li{margin-bottom:.45em}
li>ul,li>ol{margin:.45em 0 .6em}
strong{color:#1a1a1a}
em{color:#1a1a1a}
code{background:#f4f4f5;border:1px solid #ececec;border-radius:5px;padding:.1em .35em;font-size:.86em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#1a1a1a}
pre{background:#16161a;color:#e8e8ea;border-radius:10px;padding:18px 20px;margin:0 0 1.2em;overflow-x:auto;font-size:.85rem;line-height:1.6}
pre code{background:none;border:none;padding:0;color:inherit;font-size:inherit}
table{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:.9rem}
th{text-align:left;font-weight:600;color:#1a1a1a;padding:10px 12px;border-bottom:2px solid #e6e6e6;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}
td{padding:10px 12px;border-bottom:1px solid #f0f0f0;color:#374151;vertical-align:top}
tr:last-child td{border-bottom:none}
blockquote{margin:0 0 1.2em;padding:14px 18px;border-left:3px solid #1a1a1a;background:#fafafa;color:#374151}
blockquote p{margin:0}
.card{border:1px solid #e6e6e6;border-radius:10px;padding:18px 20px;margin-bottom:12px}
.card h3{margin:0 0 6px}
.card p{margin:0;color:#6b6b6b;font-size:.92rem}
.toc{border:1px solid #e6e6e6;border-radius:10px;padding:14px 18px;margin:0 0 28px;font-size:.9rem;background:#fafafa}
.toc strong{display:block;margin-bottom:6px;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:#9a9a9a}
.toc a{display:inline-block;color:#6b6b6b;text-decoration:none;margin-right:16px}
.toc a:hover{color:#1a1a1a}
.callout{margin:0 0 1.2em;padding:14px 18px;border-radius:8px;font-size:.92rem}
.callout-note{background:#f5f8ff;border:1px solid #dbe6ff;color:#2b3a63}
.callout-warn{background:#fff8f0;border:1px solid #ffe4c7;color:#6b4a24}
.callout-tip{background:#f2faf5;border:1px solid #d3ecd9;color:#215a34}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:0 0 24px}
.cta-card{display:block;border:1px solid #e6e6e6;border-radius:10px;padding:18px 20px;text-decoration:none;transition:border-color .15s;background:#fff}
.cta-card:hover{border-color:#1a1a1a}
.cta-card h3{margin:0 0 6px;font-size:1.02rem}
.cta-card p{margin:0;color:#6b6b6b;font-size:.9rem}
.post{display:block;padding:20px 22px;margin-bottom:14px;border:1px solid #e6e6e6;border-radius:10px;background:#fff;text-decoration:none;transition:border-color .15s}
.post:hover{border-color:#1a1a1a}
.post h3{margin:0 0 6px;font-size:1.08rem}
.post p{color:#6b6b6b;margin:0 0 8px;font-size:.92rem}
.post .date{margin:0;color:#9a9a9a;font-size:.82rem}
footer{border-top:1px solid #f0f0f0}
.footer-inner{max-width:1080px;margin:0 auto;padding:28px 20px;color:#6b6b6b;font-size:.875rem}
.footer-inner p{margin:0 0 8px}
.footer-inner .tagline{color:#1a1a1a;font-weight:600}
.footer-links a{color:#6b6b6b;text-decoration:none}
.footer-links a:hover{color:#1a1a1a}
.footer-links a+a{margin-left:1.25em}
@media (max-width:860px){
.layout{grid-template-columns:1fr;gap:0;padding:28px 16px 56px}
aside{position:static;max-height:none;margin-bottom:28px;border-bottom:1px solid #f0f0f0;padding-bottom:20px}
.cta-grid{grid-template-columns:1fr}
h1{font-size:1.85rem}
}