.app {
  display: flex;
  height: 100vh;
  width: 100vw;
}

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 10;
}

.sidebar-logo {
  padding: 20px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-logo small {
  color: var(--muted);
  font-size: 11px;
}

.sidebar-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 10px;
}

.main-viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.treemap-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.treemap-container svg {
  width: 100%;
  height: 100%;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 12, 16, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  gap: 16px;
}

.loading-overlay.hidden { display: none; }

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  color: var(--muted);
  font-size: 13px;
}

.breadcrumb {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

.breadcrumb span { color: var(--muted); }

.refresh-badge {
  position: absolute;
  bottom: 12px;
  right: 12px;
  z-index: 5;
  font-size: 10px;
  color: var(--muted);
  background: var(--surface);
  padding: 4px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}