:root{
  --b28-bg:#ffffff;
  --b28-rail:#f3f7f6;
  --b28-ink:#102a2e;
  --b28-accent:#10b981;
}

body{background:var(--b28-bg);color:var(--b28-ink)}

.b28-shell{display:grid;grid-template-columns: 280px 1fr;min-height:100vh}
.b28-rail{background:var(--b28-rail);border-right:1px solid rgba(16,42,46,.10)}
.b28-rail-inner{padding:18px;position:sticky;top:0;max-height:100vh;overflow:auto}

#logo img{width:52px;height:52px;object-fit:contain;border-radius:14px;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.05)}

.b28-topbar{border-bottom:1px solid rgba(16,42,46,.10);background:rgba(255,255,255,.92);backdrop-filter:saturate(120%) blur(8px);position:sticky;top:0;z-index:5}
.b28-topbar-inner{display:flex;align-items:center;gap:10px;padding:10px 16px}
.b28-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

.b28-panes{display:grid;grid-template-columns: 1fr 320px;gap:16px;padding:16px}
.b28-box{border:1px solid rgba(16,42,46,.10);box-shadow:none}

@media (max-width: 1024px){
  .b28-shell{grid-template-columns: 1fr}
  .b28-rail{position:fixed;inset:0 auto 0 0;width:280px;transform:translateX(0);transition:transform .2s ease;z-index:20}
  .b28-rail[data-hidden="true"]{transform:translateX(-100%)}
  .b28-panes{grid-template-columns: 1fr}
}

#footer{padding:28px 0;border-top:1px solid rgba(16,42,46,.12)}
#footer .social{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}
#footer .social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;background:#fff;border:1px solid rgba(16,42,46,.10);text-decoration:none;color:var(--b28-ink)}

.sr-only,.is-sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}