body{background:#f5f7fb}.app-shell{min-height:100vh;background:radial-gradient(circle at top right,rgba(37,99,235,.08),transparent 30%),#f5f7fb}.app-content{padding:26px}.app-sidebar{background:linear-gradient(180deg,#07111f,#0f172a);border-right:1px solid rgba(255,255,255,.08);box-shadow:12px 0 40px rgba(15,23,42,.18)}.sidebar-brand{border-radius:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08)}.brand-mark{background:linear-gradient(135deg,#2563eb,#7c3aed);box-shadow:0 12px 30px rgba(37,99,235,.35)}.sidebar-link{border-radius:14px;transition:.18s ease}.sidebar-link:hover{background:rgba(96,165,250,.12);transform:translateX(2px)}.sidebar-link.active{background:linear-gradient(135deg,#2563eb,#7c3aed);color:#fff;box-shadow:0 12px 28px rgba(37,99,235,.28)}.sidebar-section{color:#93c5fd;font-size:11px;letter-spacing:.12em;text-transform:uppercase;font-weight:900;margin-top:18px}.sidebar-tenant-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:18px}.app-main{min-width:0}.app-topbar{backdrop-filter:blur(18px);background:rgba(255,255,255,.82);border-bottom:1px solid #e2e8f0}.app-alert{border-radius:16px;border:0;box-shadow:0 12px 30px rgba(15,23,42,.08)}@media (max-width:900px){.app-content{padding:16px}.app-sidebar{box-shadow:20px 0 60px rgba(15,23,42,.35)}}