.app-shell { min-height: 100vh; display: grid; grid-template-columns: var(--sidebar-width) minmax(0, 1fr); }
.sidebar { position: fixed; inset: 0 auto 0 0; z-index: 40; width: var(--sidebar-width); display: flex; flex-direction: column; background: var(--surface); border-right: 1px solid var(--border); }
.brand { height: var(--topbar-height); display: flex; align-items: center; gap: 12px; flex: 0 0 auto; padding: 0 20px; border-bottom: 1px solid var(--border); }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, #3479ff, #174ad0); border-radius: 10px; box-shadow: 0 7px 16px rgba(40, 100, 232, .22); font-weight: 850; letter-spacing: -.06em; }
.brand-mark .lucide { width: 17px; height: 17px; fill: currentColor; stroke-width: 2.2; }
.brand-title { display: block; color: var(--ink-950); font-size: 17px; line-height: 1.15; font-weight: 760; letter-spacing: -.02em; }
.brand-subtitle { display: block; margin-top: 3px; color: var(--ink-500); font-size: 12px; }
.sidebar-scroll { flex: 1; overflow-y: auto; padding: 16px 12px 24px; }
.nav-group { margin-bottom: 20px; }
.nav-label { padding: 0 8px 8px; color: #98a6c0; font-size: 10px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.nav-link { min-height: 38px; display: flex; align-items: center; gap: 11px; margin: 2px 0; padding: 8px 10px; color: #596984; border-radius: 8px; font-size: 13px; font-weight: 550; transition: color var(--transition), background var(--transition), transform var(--transition); }
.nav-link:hover { color: var(--blue-700); background: var(--blue-50); transform: translateX(1px); }
.nav-link.active { color: var(--blue-600); background: var(--blue-50); font-weight: 680; box-shadow: none; }
.nav-icon { width: 17px; height: 17px; display: grid; place-items: center; color: currentColor; border: 0; border-radius: 0; font-size: 9px; font-weight: 850; opacity: .9; }
.sidebar-foot { min-height: 47px; display: flex; align-items: center; gap: 8px; flex: 0 0 auto; padding: 0 20px; color: var(--ink-500); border-top: 1px solid var(--border); font-size: 12px; }
.sidebar-foot .lucide { width: 15px; height: 15px; }
.support-card { margin: 0 12px 12px; padding: 13px; color: var(--ink-600); background: var(--blue-50); border: 1px solid var(--blue-100); border-radius: var(--radius-md); font-size: 11px; line-height: 1.45; }
.main { min-width: 0; grid-column: 2; }
.topbar { position: sticky; top: 0; z-index: 30; height: var(--topbar-height); display: grid; grid-template-columns: minmax(300px, 520px) 1fr auto; align-items: center; gap: 20px; padding: 0 24px; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.topbar-leading { width: 100%; min-width: 0; display: flex; align-items: center; gap: 8px; }
.mobile-trigger { display: none; }
.global-search { width: 100%; min-width: 0; height: 42px; display: flex; align-items: center; gap: 10px; padding: 0 14px; background: #f8faff; border: 1px solid var(--border); border-radius: 10px; }
.global-search > .lucide { width: 17px; height: 17px; flex: 0 0 auto; color: #7d8ba2; }
.global-search input { width: 100%; min-width: 0; color: var(--ink-900); background: transparent; border: 0; outline: 0; font-size: 13px; }
.key { padding: 3px 7px; color: var(--ink-500); background: #fff; border: 1px solid var(--border-strong); border-radius: 6px; box-shadow: var(--shadow-xs); font-size: 10px; white-space: nowrap; }
.top-actions { display: flex; align-items: center; flex: 0 0 auto; gap: 8px; }
.notification-button { position: relative; }
.notification-ping { position: absolute; top: 7px; right: 7px; width: 6px; height: 6px; background: var(--red-600); border: 1px solid #fff; border-radius: 50%; }
.user { display: flex; align-items: center; gap: 9px; padding: 4px 7px 4px 4px; border: 0; background: transparent; border-radius: 10px; }
.user:hover { background: var(--ink-100); }
.avatar { width: 30px; height: 30px; display: grid; place-items: center; flex: 0 0 auto; color: #fff; background: linear-gradient(145deg, #344966, #13213a); border-radius: 50%; font-size: 11px; font-weight: 750; }
.user-copy { min-width: 0; display: block; text-align: left; }
.user-name { display: block; color: var(--ink-900); font-size: 11px; line-height: 1.25; font-weight: 750; white-space: nowrap; }
.user-role { display: block; margin-top: 1px; color: var(--ink-500); font-size: 9px; line-height: 1.25; white-space: nowrap; }
.user-chevron { width: 14px; height: 14px; color: var(--ink-400); }
.page { width: min(1600px, 100%); margin: 0 auto; padding: 20px 24px 26px; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 16px; }
.page-header > div:first-child { min-width: 0; }
.page-header p { margin: 0; font-size: 12px; }
.page-actions { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 8px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.metric-grid.six { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.grid-main { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(300px, .8fr); gap: 12px; }
.stack { display: grid; gap: 12px; }
.span-2 { grid-column: span 2; }
.split { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

@media (max-width: 1180px) {
  .metric-grid.six { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .app-shell { display: block; }
  .sidebar { transform: translateX(-102%); box-shadow: var(--shadow-md); transition: transform var(--transition); }
  body.nav-open .sidebar { transform: translateX(0); }
  body.nav-open::after { content: ""; position: fixed; inset: 0; z-index: 35; background: rgba(19,32,58,.35); }
  .main { width: 100%; }
  .topbar { grid-template-columns: minmax(0, 1fr) auto; padding: 0 16px; }
  .topbar > span { display: none; }
  .mobile-trigger { display: inline-grid; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-main { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .topbar { height: 64px; gap: 8px; }
  .user-copy, .key { display: none; }
  .page { padding: 20px 16px 32px; }
  .page-header { display: block; }
  .page-actions { justify-content: flex-start; margin-top: 14px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
}
@media (max-width: 520px) {
  .metric-grid, .metric-grid.six { grid-template-columns: 1fr; }
  .global-search input::placeholder { color: transparent; }
  .page-actions .btn { flex: 1; }
}