.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.app-sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px 14px 8px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 12px;
}

.sidebar-brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.sidebar-brand-title {
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.sidebar-brand-sub {
  font-size: 0.66rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.sidebar-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 8px 8px 5px 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 10px;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all 0.12s ease;
}

.sidebar-nav-item:hover {
  background: var(--bg-surface);
  color: #ffffff;
}

.sidebar-nav-item.active {
  background: rgba(99, 102, 241, 0.16);
  border-color: rgba(99, 102, 241, 0.45);
  color: #ffffff;
  font-weight: 600;
}

.sidebar-project-badge {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.sidebar-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-profile-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 9px 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
}

.workspace-topbar {
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.workspace-title-cluster {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.workspace-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.workspace-subtitle {
  font-size: 0.73rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.workspace-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.project-subnav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
}

.subnav-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 10px 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: all 0.14s ease;
}

.subnav-tab:hover {
  color: #ffffff;
}

.subnav-tab.active {
  color: #ffffff;
  border-bottom-color: var(--accent-primary);
}

.workspace-content {
  padding: 16px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Portfolio Grid Cards */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 14px;
}

.portfolio-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-top: 3px solid var(--accent-primary);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  transition: transform 0.14s ease, border-color 0.14s ease;
}

.portfolio-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.portfolio-kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.portfolio-kpi {
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 7px 8px;
  text-align: center;
}

.portfolio-kpi-val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
}

.portfolio-kpi-lbl {
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
}