.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  transition: width 0.2s ease, padding 0.2s ease;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar.collapsed {
  width: 60px;
  padding: 1.5rem 0.6rem;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.sidebar-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 0.4rem;
  color: var(--text);
  padding: 0.4rem;
  cursor: pointer;
  display: flex;
  flex-shrink: 0;
}

.sidebar-toggle svg {
  width: 18px;
  height: 18px;
}

.sidebar-title {
  font-weight: 700;
  white-space: nowrap;
  color: var(--text);
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .sidebar-link span {
  display: none;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

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

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.6rem;
  border-radius: 0.4rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-decoration: none;
}

.sidebar-link.active {
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
}

.sidebar-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
}

.sidebar-link .lock-badge {
  width: 13px;
  height: 13px;
  margin-left: auto;
  color: var(--muted);
  flex-shrink: 0;
}

.sidebar.collapsed .lock-badge {
  display: none;
}

.sidebar-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

.sidebar-group + .sidebar-group {
  margin-top: 0.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.sidebar.collapsed .sidebar-group + .sidebar-group {
  padding-top: 0;
  border-top: none;
}

.sidebar-group-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.6rem;
  border-radius: 0.4rem;
  color: var(--text);
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}

.sidebar-group-label:hover {
  background: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}

.sidebar-group-label.active {
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
}

.sidebar-group-label svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
}

.sidebar-link.sub {
  padding-left: 1.9rem;
  font-weight: 500;
  color: var(--accent-alt);
}

.sidebar-link.sub:hover {
  color: var(--text);
}

.sidebar-link.sub.active {
  color: var(--accent);
}

.sidebar.collapsed .sidebar-group-label span {
  display: none;
}

.sidebar.collapsed .sidebar-link.sub {
  display: none;
}

.sidebar-link.locked svg {
  color: var(--muted);
}

.sidebar-link.locked {
  opacity: 0.7;
}

.sidebar-link.locked:hover {
  opacity: 1;
}

.sidebar-datetime {
  padding: 0.4rem 0.6rem 0.6rem;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.4;
  white-space: nowrap;
}

.sidebar-last-updated {
  text-align: left;
  opacity: 0.8;
}

.sidebar.collapsed .sidebar-datetime {
  display: none;
}

.app-main {
  flex: 1;
  min-width: 0;
}

.app-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
}

.app-topbar .brand {
  display: flex;
  align-items: center;
  font-weight: 800;
  color: var(--text);
}

.app-topbar .brand svg {
  width: 22px;
  height: 22px;
}

.app-topbar .brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar-title {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}

.topbar-title:empty {
  display: none;
}

.topbar-clock {
  color: var(--muted);
  font-size: 0.85rem;
  white-space: nowrap;
}

@media (max-width: 700px) {
  .topbar-clock {
    display: none;
  }
}