.app-shell {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: stretch;
}

.content {
  flex: 1;
  height: 100%;
  overflow: auto;
  animation: fade-in-up 0.3s var(--ease-out) both;
}

/* Placeholder empty-state styling, shown only until real pages are registered. */
.content-placeholder {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* ---------- Persistent sidebar navigation ---------- */

.app-sidebar {
  width: 232px;
  flex-shrink: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: var(--space-5) var(--space-3);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: width var(--dur-base) var(--ease-out), padding var(--dur-base) var(--ease-out),
    opacity var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}

.app-sidebar.collapsed {
  width: 0;
  padding-left: 0;
  padding-right: 0;
  opacity: 0;
  border-right-color: transparent;
}

.app-sidebar-brand {
  padding: 0 var(--space-3) var(--space-6);
}

.app-sidebar-brand-logo {
  width: 56px;
  height: auto;
  display: block;
}

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

.app-nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 10px var(--space-3);
  white-space: nowrap;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13.5px;
  font-weight: 500;
  text-align: left;
  opacity: 0;
  animation: nav-item-in var(--dur-base) var(--ease-out) both;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.app-nav-icon {
  display: flex;
  flex-shrink: 0;
  color: inherit;
}

.app-nav-item:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.app-nav-item:active {
  transform: scale(0.98);
}

.app-nav-item.active {
  background: var(--bg-surface-raised);
  color: var(--text-primary);
  box-shadow: inset 2px 0 0 var(--accent-bright);
}

/* ---------- Home dashboard ---------- */

.home-page {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-7) var(--space-6);
}

.home-hero {
  margin-bottom: var(--space-6);
}

.home-hero-title {
  margin: 0 0 var(--space-2);
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.home-hero-subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.home-cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  width: 100%;
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  background: linear-gradient(160deg, var(--bg-surface-raised), var(--bg-surface));
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  text-align: left;
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}

.home-cta-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.home-cta-card:active {
  transform: translateY(0) scale(0.995);
}

.home-cta-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-app);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
}

.home-cta-text {
  flex: 1;
}

.home-cta-text-title {
  display: block;
  margin-bottom: 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.home-cta-text-desc {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
}

.home-cta-arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-app);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  transition: transform var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}

.home-cta-card:hover .home-cta-arrow {
  transform: translateX(3px);
  background: var(--bg-surface-hover);
}

.home-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.home-feature-card {
  padding: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.home-feature-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.home-feature-title {
  margin: 0 0 4px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-primary);
}

.home-feature-desc {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}