*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
  height: 100%;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

button { cursor: pointer; font-family: inherit; font-size: 14px; border: none; background: none; }

input, textarea, select {
  font-family: inherit;
  font-size: 14px;
  outline: none;
  background: none;
  border: none;
  color: var(--text-primary);
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── App shell ─────────────────────────────────────────────────────────── */
.shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.main-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* ─── Sidebar ───────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-base);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border-muted);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--bg-hover);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-text { line-height: 1.2; }
.logo-title { font-size: 13px; font-weight: 700; color: var(--text-primary); }
.logo-sub   { font-size: 11px; color: var(--text-secondary); }

.sidebar-nav { flex: 1; padding: 10px 8px; overflow-y: auto; min-height: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
}

.nav-item:hover { color: var(--text-primary); background: var(--bg-hover); }

.nav-item.active {
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid transparent;
}

.nav-item .nav-chevron { margin-left: auto; opacity: 0.5; }

/* ─── Sidebar system stats ──────────────────────────────────────────────── */
.sys-stats {
  padding: 12px 14px;
  border-top: 1px solid var(--border-muted);
}

.sys-stats-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.mini-stat { margin-bottom: 8px; }

.mini-stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}

.mini-stat-row span:last-child { color: var(--text-primary); font-weight: 500; }

.mini-bar {
  height: 3px;
  background: var(--bg-muted);
  border-radius: 10px;
  overflow: hidden;
}

.mini-bar-fill {
  height: 100%;
  border-radius: 10px;
  transition: width 0.5s ease;
}

.mini-bar-fill.blue   { background: var(--accent); }
.mini-bar-fill.purple { background: var(--purple); }
.mini-bar-fill.orange { background: var(--orange); }

/* ─── Sidebar app list ──────────────────────────────────────────────────── */
.sidebar-section-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  padding: 8px 10px 4px;
  margin-top: 2px;
}

.sidebar-apps-empty {
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 10px 8px;
}

.sidebar-app-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
  overflow: hidden;
  border: 1px solid transparent;
}

.sidebar-app-item:hover { color: var(--text-primary); background: var(--bg-hover); }

.sidebar-app-item.active {
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid transparent;
}

.sidebar-node-group {
  margin-bottom: 6px;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
}

.sidebar-node-group:hover {
  border-color: transparent;
}

.sidebar-node-group-label {
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  padding: 2px 10px 4px;
}

.sidebar-node-group-label--apps {
  padding-top: 4px;
}

.sidebar-node-item {
  font-weight: 600;
}

.sidebar-node-item:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  border: 1px solid transparent;
}

.sidebar-node-apps {
  margin-left: 14px;
  padding-left: 10px;
  border-left: 1px solid var(--tree-line);
}

.sidebar-app-item--nested {
  font-size: 11px;
  color: var(--text-secondary);
}

.sidebar-apps-empty--nested {
  padding-left: 8px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.sidebar-app-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.sidebar-app-dot--node-offline {
  border: 1px solid color-mix(in srgb, var(--red-border) 72%, var(--border));
  box-shadow: none;
}

.sidebar-app-dot--node-unknown {
  border: 1px solid color-mix(in srgb, var(--accent-border) 72%, var(--border));
  box-shadow: none;
}

.sidebar-app-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Sidebar footer ────────────────────────────────────────────────────── */
.sidebar-footer {
  padding: 10px 8px;
  border-top: 1px solid var(--border-muted);
}

.sidebar-footer-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.sidebar-footer-btn:hover { color: var(--text-primary); background: var(--bg-hover); }
.sidebar-footer-btn--danger { color: var(--red) !important; }
.sidebar-footer-btn--danger:hover { background: var(--red-bg) !important; color: var(--red) !important; }