:root{--primary:#1976D2;--surface:#FAFAFA;--surface-container:#F1F2F4;--surface-container-high:#E9EBEE;--outline-variant:#C4C6CF;--on-surface:#1A1C1E;--on-surface-variant:#43474E;--canvas:#EEF0F2;}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:'Roboto',system-ui,sans-serif;background:var(--surface);color:var(--on-surface);-webkit-font-smoothing:antialiased;line-height:1.6}
a{color:var(--primary);text-decoration:none}a:hover{color:#155fa8;text-decoration:underline}
header{position:sticky;top:0;z-index:10;background:rgba(250,250,250,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--outline-variant)}
.nav{max-width:840px;margin:0 auto;height:64px;display:flex;align-items:center;gap:12px;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--on-surface)}
.brand-mark{width:34px;height:34px;border-radius:10px;overflow:hidden;display:flex;align-items:center;justify-content:center;flex-shrink:0}.brand-mark img{width:100%;height:100%;object-fit:cover}
.back{margin-left:auto;font-size:14px;font-weight:500;color:var(--on-surface-variant);display:inline-flex;align-items:center;gap:6px}
.back:hover{color:var(--on-surface);text-decoration:none}
main{max-width:840px;margin:0 auto;padding:48px 24px 96px}
h1{font-size:clamp(28px,4vw,38px);line-height:1.15;letter-spacing:-.6px;margin:0 0 8px}
h2{font-size:22px;letter-spacing:-.3px;margin:44px 0 12px;padding-top:8px}
h3{font-size:17px;margin:28px 0 8px}
h4{font-size:15px;margin:22px 0 6px}
p{margin:12px 0}
ul,ol{margin:12px 0;padding-left:22px}li{margin:6px 0}
hr{border:0;border-top:1px solid var(--outline-variant);margin:36px 0}
strong{font-weight:700}
code{font-family:'Roboto Mono',monospace;font-size:.88em;background:var(--surface-container-high);padding:2px 6px;border-radius:6px;word-break:break-all}
table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px}
th,td{text-align:left;padding:11px 14px;border:1px solid var(--outline-variant);vertical-align:top}
th{background:var(--surface-container);font-weight:600}
tr:nth-child(even) td{background:color-mix(in srgb,var(--surface-container) 45%,transparent)}
footer{border-top:1px solid var(--outline-variant);background:var(--surface-container)}
.foot{max-width:840px;margin:0 auto;padding:28px 24px;font-size:13.5px;color:var(--on-surface-variant);display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
.foot-links{display:flex;gap:16px;flex-wrap:wrap}
.foot-links a{color:var(--on-surface-variant);font-weight:500}.foot-links a:hover{color:var(--on-surface);text-decoration:none}