.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  min-height: 100vh;
  padding: var(--space-5);
  gap: var(--space-5);
}

.app-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed-width) minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: var(--space-5);
  height: calc(100vh - (var(--space-5) * 2));
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-4);
  color: var(--color-text-primary);
  background: rgba(18, 28, 32, 0.42);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft), var(--shadow-inset);
  backdrop-filter: var(--glass-blur);
  transition: width var(--transition), transform var(--transition);
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 48px;
}

.brand-mark {
  display: grid;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  place-items: center;
  font-weight: 800;
  color: #fff;
  background: rgba(255, 255, 255, 0.13);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-inset);
}

.brand-copy,
.sidebar-user-copy,
.nav-copy,
.nav-section-title {
  transition: opacity var(--transition), width var(--transition);
}

.brand-copy strong,
.sidebar-user-copy strong {
  display: block;
}

.brand-copy span,
.sidebar-user-copy span {
  display: block;
  margin-top: 2px;
  color: var(--color-text-secondary);
  font-size: var(--font-xs);
}

.sidebar-nav {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-5);
}

.nav-section {
  display: grid;
  gap: var(--space-2);
}

.nav-section-title {
  padding: 0 var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 42px;
  padding: 10px var(--space-3);
  color: var(--color-text-secondary);
  background: transparent;
  border: 0;
  border-radius: 999px;
  text-align: left;
}

.nav-item:hover,
.nav-item:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.nav-item.active {
  color: #fff;
  background: rgba(47, 140, 255, 0.74);
  box-shadow: var(--shadow-inset), 0 10px 28px rgba(61, 50, 37, 0.12);
}

.nav-icon {
  display: grid;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  place-items: center;
  color: currentColor;
  font-size: var(--font-sm);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.34);
}

.nav-badge {
  margin-left: auto;
  min-width: 22px;
  padding: 2px 7px;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  font-size: 0.68rem;
  text-align: center;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: var(--radius-md);
}

.sidebar-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  min-height: 40px;
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-weight: 800;
}

.sidebar-logout:hover,
.sidebar-logout:focus-visible {
  background: rgba(255, 255, 255, 0.18);
}

.app-shell.sidebar-collapsed .brand-copy,
.app-shell.sidebar-collapsed .sidebar-user-copy,
.app-shell.sidebar-collapsed .nav-copy,
.app-shell.sidebar-collapsed .nav-section-title,
.app-shell.sidebar-collapsed .nav-badge,
.app-shell.sidebar-collapsed .sidebar-logout span:last-child {
  width: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.app-shell.sidebar-collapsed .nav-item,
.app-shell.sidebar-collapsed .brand,
.app-shell.sidebar-collapsed .sidebar-user,
.app-shell.sidebar-collapsed .sidebar-logout {
  justify-content: center;
}

.workspace {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: var(--space-5);
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(280px, 460px) auto;
  gap: var(--space-4);
  align-items: center;
  min-height: var(--topbar-height);
  padding: 0 var(--space-5);
  background: rgba(30, 36, 38, 0.42);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-subtle), var(--shadow-inset);
  backdrop-filter: var(--glass-blur);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.section-title {
  min-width: 0;
}

.section-title p {
  margin: 0 0 3px;
  color: var(--color-text-secondary);
  font-size: var(--font-xs);
}

.section-title h1 {
  margin: 0;
  font-size: var(--font-xl);
  line-height: 1.1;
}

.global-search {
  position: relative;
}

.global-search input {
  width: 100%;
  height: 42px;
  padding: 0 42px 0 14px;
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

.global-search span {
  position: absolute;
  top: 50%;
  right: 14px;
  color: var(--color-text-muted);
  transform: translateY(-50%);
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
}

.main-content {
  padding: var(--space-5) 0 0;
}

.mobile-backdrop {
  position: fixed;
  inset: 0;
  z-index: 39;
  background: rgba(11, 14, 18, 0.42);
}