:root{--ink:#172631;--muted:#59707d;--blue:#245f93;--paper:#fff;--ground:#eef3f8;--line:#c5d3df}*{box-sizing:border-box}body{margin:0;background:var(--ground);font:16px/1.55 "Segoe UI",Arial,sans-serif;color:var(--ink)}a{color:#075b86}.shell{display:grid;grid-template-columns:245px minmax(0,1fr);min-height:100vh}.rail{background:linear-gradient(#174f82,#0b354f);color:#fff;padding:22px 14px}.brand{display:flex;gap:10px;align-items:center;font-weight:700;text-decoration:none;color:#fff;line-height:1.2}.brand img{width:42px;height:42px}.brand small{display:block;font-weight:400;color:#c8dfef}.rail-toggle{width:100%;margin:22px 0 12px;padding:8px;background:#245f93;border:1px solid #78a8ce;color:#fff;border-radius:4px;cursor:pointer;text-align:left}.nav a{display:block;color:#eef7ff;text-decoration:none;padding:8px 10px;border-radius:4px;margin:2px 0}.nav a:hover,.nav a[aria-current="page"]{background:#3a79ad}.page{padding:28px 32px 38px;max-width:1100px}.hero,.card{background:var(--paper);border:1px solid var(--line);border-radius:6px;box-shadow:0 1px 3px #0a3d5018}.hero{padding:30px;border-left:7px solid var(--blue);margin-bottom:16px}.hero h1{margin:.2rem 0 .5rem;font-size:clamp(1.7rem,3vw,2.5rem);line-height:1.15}.kicker{margin:0;color:var(--blue);font-weight:700;letter-spacing:.06em;font-size:.78rem}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin-top:16px}.card{padding:18px;margin:16px 0}.card h2{margin-top:0;font-size:1.22rem}.button{display:inline-block;background:var(--blue);color:#fff!important;padding:10px 14px;border-radius:4px;text-decoration:none;font-weight:700}.button.secondary{background:#e6f0f8;color:#174f82!important;border:1px solid #8db0ce}.notice{border-left:5px solid #cf8a13;background:#fff9ed;padding:12px 14px;margin:18px 0}.footer{margin-top:25px;color:var(--muted);font-size:.9rem}.small{font-size:.9rem}code{overflow-wrap:anywhere;background:#edf3f5;padding:.1rem .3rem;border-radius:3px}@media(max-width:720px){.shell{grid-template-columns:1fr}.rail{padding:14px}.nav{display:none}.rail.open .nav{display:block}.page{padding:18px}.rail-toggle{margin:12px 0 0}}@media(min-width:721px){.shell.collapsed{grid-template-columns:62px minmax(0,1fr)}.shell.collapsed .brand span,.shell.collapsed .rail-toggle span,.shell.collapsed .nav a span{display:none}.shell.collapsed .rail{padding:16px 8px}.shell.collapsed .brand{justify-content:center}.shell.collapsed .brand img{width:38px}.shell.collapsed .nav a{text-align:center;padding:9px 2px}.shell.collapsed .rail-toggle{text-align:center}}