body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-charcoal);
  background-color: var(--color-cream);
  display: flex;
  min-height: 100vh;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  color: var(--color-espresso);
}

h1 { font-size: 2.5rem; font-weight: 600; }
h2 { font-size: 2rem; font-weight: 600; }
h3 { font-size: 1.5rem; font-weight: 500; }
h4 { font-size: 1.25rem; font-weight: 500; }

/* Sidebar Navigation */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--color-parchment);
  border-right: 1px solid var(--color-fog);
  display: flex;
  flex-direction: column;
  padding: var(--space-lg) 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0 var(--space-lg);
  margin-bottom: var(--space-xl);
  text-decoration: none;
}

.nav-brand-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.nav-brand-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-brand-dots {
  display: block;
}

.nav-brand-name {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-espresso);
  letter-spacing: 0.02em;
}

.nav-search {
  padding: 0 var(--space-lg);
  margin-bottom: var(--space-lg);
}

.nav-links {
  flex: 1;
  padding: 0 var(--space-sm);
}

.nav-section-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-stone);
  padding: var(--space-md) var(--space-md) var(--space-xs);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-stone);
  font-size: 0.925rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.nav-link:hover {
  background-color: var(--color-cloud);
  color: var(--color-espresso);
}

.nav-link.active {
  background-color: var(--color-cloud);
  color: var(--color-espresso);
}

.nav-link.active:hover {
  background-color: var(--color-cloud);
}

.nav-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-link.active svg {
  opacity: 1;
}

/* Nav link color variants - icon fills with logo colors when active */
.nav-link-salmon.active svg {
  stroke: #F5A07A;
  fill: #F5A07A;
  fill-opacity: 0.15;
}

.nav-link-blue.active svg {
  stroke: #7AB8F5;
  fill: #7AB8F5;
  fill-opacity: 0.15;
}

.nav-link-purple.active svg {
  stroke: #6B3A5C;
  fill: #6B3A5C;
  fill-opacity: 0.15;
}

.nav-footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-fog);
  margin-top: auto;
}

/* Main Content */
#app-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  padding: var(--space-2xl) var(--space-xl);
  max-width: calc(var(--content-max-width) + var(--sidebar-width));
}

.page-header {
  margin-bottom: var(--space-xl);
}

.page-title {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.page-subtitle {
  color: var(--color-stone);
  font-size: 1rem;
}

/* Mobile overlay backdrop */
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 99;
}

.nav-backdrop.visible {
  display: block;
}

/* Mobile menu toggle */
.mobile-nav-toggle {
  display: none;
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: 101;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-parchment);
  border: 1px solid var(--color-fog);
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.mobile-nav-toggle svg {
  width: 22px;
  height: 22px;
  color: var(--color-espresso);
}

/* Error state */
.error-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.error-state h2 {
  margin-bottom: var(--space-sm);
}

.error-state p {
  color: var(--color-stone);
  margin-bottom: var(--space-lg);
}