/* Layout */
.app { display: flex; height: 100vh; overflow: hidden; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--bg-surface); border-right: 1px solid var(--border-subtle);
  display: flex; flex-direction: column; padding: 0;
  position: relative; z-index: 10;
}
.sidebar-header {
  padding: 24px 20px 20px; border-bottom: 1px solid var(--border-subtle);
}
.sidebar-brand {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 1.8px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.sidebar-title {
  font-size: 16px; font-weight: 500; color: var(--text-primary);
  letter-spacing: -0.2px;
}
.sidebar-nav { flex: 1; padding: 12px 10px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 13px; font-weight: 400;
  cursor: pointer; transition: all 0.15s ease; text-decoration: none;
  letter-spacing: 0.1px;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--bg-elevated); color: var(--text-primary); font-weight: 500; }
.nav-item.active .nav-icon { color: var(--accent); }
.nav-icon { width: 18px; height: 18px; opacity: 0.6; flex-shrink: 0; }
.nav-item.active .nav-icon { opacity: 1; }

.sidebar-footer {
  padding: 16px 14px; border-top: 1px solid var(--border-subtle);
  display: flex; align-items: center; gap: 10px;
}
.user-avatar {
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent-dim);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600; color: var(--accent); flex-shrink: 0;
  text-transform: uppercase;
}
.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 12px; font-weight: 500; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { font-size: 11px; color: var(--text-tertiary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.btn-logout {
  background: none; border: none; color: var(--text-tertiary); cursor: pointer;
  padding: 4px; border-radius: 4px; transition: color 0.15s;
}
.btn-logout:hover { color: var(--status-failed); }

/* Main content */
.main { flex: 1; overflow-y: auto; overflow-x: hidden; position: relative; }
.main-inner { padding: 32px 36px; max-width: 1200px; }

/* Page header */
.page-header { margin-bottom: 28px; }
.page-title { font-size: 22px; font-weight: 500; letter-spacing: -0.4px; color: var(--text-primary); }
.page-subtitle { font-size: 13px; color: var(--text-tertiary); margin-top: 4px; }

/* Page hide */
.page { display: none; }
.page.active { display: block; }

/* Responsive */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .panel { width: 100%; }
}