.app-shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh;transition:grid-template-columns .2s ease}
.app-shell.sidebar-collapsed{grid-template-columns:76px 1fr}
.sidebar{background:linear-gradient(180deg,var(--nav),var(--nav2));color:#fff;min-height:100vh;position:sticky;top:0;padding:18px 14px;overflow:hidden;border-right:1px solid rgba(255,255,255,.08)}
.sidebar-toggle{position:fixed;left:14px;top:14px;z-index:50;border:0;width:40px;height:40px;border-radius:10px;background:#fff;color:#111827;box-shadow:var(--shadow);font-weight:900}
.brand-block{display:flex;gap:12px;align-items:center;margin:46px 4px 18px 4px;min-width:240px}
.brand-mark{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent-dark));display:grid;place-items:center;font-size:16px;font-weight:950;letter-spacing:.02em;box-shadow:0 14px 28px rgba(230,51,40,.22)}
.brand-block h1{font-size:17px;line-height:1.1;margin:0;letter-spacing:-.02em}.brand-block p{margin:4px 0 0;color:#cbd5e1;font-size:12px}
.app-shell.sidebar-collapsed .brand-block{justify-content:center;margin-left:0;min-width:0}.app-shell.sidebar-collapsed .brand-block h1,.app-shell.sidebar-collapsed .brand-block p,.app-shell.sidebar-collapsed .sidebar-note{display:none}
.main-nav{display:grid;gap:6px;margin-top:18px}.nav-btn{border:0;background:transparent;color:#d7e1ee;display:flex;gap:10px;align-items:center;text-align:left;width:100%;border-radius:10px;padding:11px 12px;font-weight:800;font-size:13px}.nav-btn:hover,.nav-btn.active{background:rgba(255,255,255,.10);color:#fff}.nav-icon{width:24px;text-align:center;flex:none}.app-shell.sidebar-collapsed .nav-label{display:none}.app-shell.sidebar-collapsed .nav-btn{justify-content:center;padding:12px 0}.sidebar-note{margin:18px 4px 0;padding:14px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.08);border-radius:14px;display:grid;gap:6px;color:#d7e1ee}.sidebar-note strong{color:#fff}.sidebar-note span{font-size:12px;line-height:1.35}
.main-area{padding:24px;overflow-x:hidden;max-width:1560px;width:100%;margin:0 auto}.topbar{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:20px}.topbar h2{font-size:26px;margin:0;letter-spacing:-.04em}.topbar p{margin:6px 0 0;color:var(--muted);font-size:14px}.top-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.section{display:none}.section.active{display:block;animation:fade .16s ease}@keyframes fade{from{opacity:.3;transform:translateY(4px)}to{opacity:1;transform:none}}
@media(max-width:960px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;z-index:40;width:280px;transform:translateX(0);transition:transform .2s ease}.app-shell.sidebar-collapsed .sidebar{transform:translateX(-100%)}.main-area{padding:74px 14px 18px}.topbar{align-items:flex-start;flex-direction:column}.top-actions{justify-content:flex-start}}