:root{--sb-blue:#2563eb;--sb-blue-dark:#1d4ed8;--sb-blue-50:#eff6ff;--sb-yellow:#facc15;--sb-yellow-dark:#ca8a04;--sb-yellow-50:#fefce8;--sb-ink:#1f2937;--sb-ink-muted:#4b5563;--sb-border:#e5e7eb}.layout{flex-direction:column;min-height:100vh;display:flex;position:relative}.layout__body{flex:1;display:flex}.layout__content{flex:1;min-width:0;padding:1.5rem}.header{z-index:50;border-bottom:1px solid var(--sb-border);background:#fff;flex-direction:column;padding:.75rem 1.5rem 0;display:flex;position:sticky;top:0}.header__row{align-items:center;gap:.75rem;padding-bottom:.6rem;display:flex}.header__brand{color:inherit;align-items:center;gap:.5rem;text-decoration:none;display:flex}.header__brand:hover .header__brand-text{color:var(--sb-blue-dark)}.header__logo{object-fit:contain;border-radius:6px;width:28px;height:28px}.header__brand-text{color:var(--sb-ink);letter-spacing:-.01em;white-space:nowrap;font-size:1.05rem;font-weight:700;transition:color .15s}.header__tabs{white-space:nowrap;-webkit-overflow-scrolling:touch;scrollbar-width:thin;border-top:1px solid var(--sb-border);gap:1.25rem;padding:.55rem 0;display:flex;overflow-x:auto}.header__tabs::-webkit-scrollbar{height:4px}.header__tabs::-webkit-scrollbar-thumb{background:var(--sb-border);border-radius:4px}.header__tabs a{color:var(--sb-ink-muted);border-bottom:2px solid #0000;flex-shrink:0;padding:.3rem .05rem;font-size:.925rem;font-weight:500;text-decoration:none;transition:color .15s,border-color .15s}.header__tabs a:hover{color:var(--sb-blue)}.header__tabs a.active{color:var(--sb-blue-dark);border-bottom-color:var(--sb-yellow);font-weight:600}.header__toggle{border:1px solid var(--sb-border);color:var(--sb-blue);cursor:pointer;background:#fff;border-radius:6px;flex-shrink:0;width:34px;height:34px;font-size:1rem;transition:border-color .15s,background .15s;display:none}.header__toggle:hover{border-color:var(--sb-blue);background:var(--sb-blue-50)}.header__toggle[aria-expanded=true]{background:var(--sb-blue);border-color:var(--sb-blue);color:#fff}.left-menu{border-right:1px solid var(--sb-border);background:#fff;flex-shrink:0;width:240px;padding:1rem .75rem;overflow-y:auto}.left-menu ul{margin:0;padding:0;list-style:none}.left-menu li{margin:.1rem 0}.left-menu a{color:var(--sb-ink-muted);border-left:3px solid #0000;border-radius:6px;padding:.4rem .6rem;font-size:.9rem;text-decoration:none;transition:background .15s,color .15s,border-color .15s;display:block}.left-menu a:hover{background:var(--sb-blue-50);color:var(--sb-blue)}.left-menu a.active{background:var(--sb-yellow-50);color:var(--sb-blue-dark);border-left-color:var(--sb-yellow);font-weight:600}@media (width<=640px){.header__toggle{display:block}.left-menu{z-index:55;background:#fff;width:260px;max-width:80vw;height:100vh;transition:transform .2s;position:fixed;top:0;left:0;transform:translate(-100%)}.left-menu--open{transform:translate(0)}}.left-menu__toggle{justify-content:space-between;align-items:center;display:flex}.left-menu__toggle.open .left-menu__label{color:var(--sb-blue-dark);font-weight:600}.left-menu__children{padding-left:1rem}.left-menu__label{flex:1}.left-menu__arrow-btn{cursor:pointer;color:var(--sb-ink-muted);background:0 0;border:none;align-items:center;padding:.4rem;display:flex}.left-menu__arrow{border-bottom:2px solid;border-right:2px solid;width:6px;height:6px;transition:transform .15s;display:inline-block;transform:rotate(45deg)}.left-menu__toggle.open .left-menu__arrow{color:var(--sb-yellow-dark);transform:rotate(-135deg)}.app__backdrop{-webkit-backdrop-filter:blur(3px);z-index:52;background:#00000026;position:fixed;inset:0}.onpage-float{display:none}@media (width<=1100px){.onpage-float{display:block}}.onpage-float__toggle{border:1px solid var(--sb-border);width:36px;height:36px;color:var(--sb-blue);cursor:pointer;z-index:45;background:#fff;border-radius:8px;justify-content:center;align-items:center;display:flex;position:fixed;top:6.5rem;right:1rem;box-shadow:0 1px 3px #0000001f}.onpage-float__toggle[aria-expanded=true]{background:var(--sb-blue);border-color:var(--sb-blue);color:#fff}.onpage-float__panel{z-index:55;background:#fff;width:260px;max-width:80vw;height:100vh;padding:6.5rem 1.25rem 1.5rem;transition:transform .2s;position:fixed;top:0;right:0;overflow-y:auto;transform:translate(100%);box-shadow:-2px 0 12px #00000014}.onpage-float__panel--open{transform:translate(0)}.onpage-float__panel-title{letter-spacing:.06em;text-transform:uppercase;color:var(--sb-blue-dark);border-bottom:2px solid var(--sb-yellow);margin:0 0 .75rem;padding-bottom:.5rem;font-size:.7rem;font-weight:700}.on-page-nav ul{margin:0;padding:0;list-style:none}.on-page-nav a.active{color:var(--sb-blue-dark);font-weight:600}.right-panel{flex-shrink:0;align-self:flex-start;width:220px;max-height:calc(100vh - 6.5rem);padding:1.5rem 1rem;position:sticky;top:6.5rem;overflow-y:auto}.right-panel__title{letter-spacing:.06em;text-transform:uppercase;color:var(--sb-blue-dark);border-bottom:2px solid var(--sb-yellow);margin:0 0 .75rem;padding-bottom:.5rem;font-size:.7rem;font-weight:700}@media (width<=1100px){.right-panel{display:none}}.footer{border-top:3px solid var(--sb-yellow);box-shadow:inset 0 1px 0 var(--sb-border);text-align:center;color:var(--sb-ink-muted);background:#fff;padding:1.25rem 1.5rem;font-size:.85rem}.footer__brand{color:var(--sb-blue-dark);font-weight:600}