/* Sidebar Menu Bar Styling */
.app-sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-brand {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  font-size: 1.6rem;
  background: var(--bg-surface);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.brand-info h2 {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-info span {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
}

.sidebar-nav {
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  padding: 0.75rem 0.6rem 0.35rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item svg {
  color: var(--text-dim);
  transition: color 0.2s ease;
}

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

.nav-item.active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}
.nav-item.active svg {
  color: #3b82f6;
}

.nav-badge {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--bg-surface);
  color: var(--text-muted);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
}

.nav-tag {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
}

.excel-tag {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.sidebar-footer {
  padding: 1rem 0.75rem;
  border-top: 1px solid var(--border-color);
}

.server-status-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.status-indicator.online {
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.server-info {
  display: flex;
  flex-direction: column;
}
.server-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
}
.server-url {
  font-size: 0.65rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}