/*****************************************************
LEFT NAVIGATION SIDEBAR
Vertical navigation for content hierarchies
*****************************************************/

.left-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 25vw;
  height: 100vh;
  padding: var(--spacing-lg) var(--spacing-sm);
  overflow-y: auto;
  background: var(--bg-page);
  border-right: 1px solid var(--accent-border);
  box-shadow: var(--shadow-md);
}

h2.left-bar-nav-section {
  margin-top: 1.3rem;
  padding-left: 0;
  font-size: 1.2rem;
  letter-spacing: -0.02rem;
  color: var(--text-body);
  border-bottom: 1px solid var(--accent-border);
}

.left-bar ul {
  margin: 0 0 0 var(--spacing-sm);
  padding: 0;
  list-style: none;
}

.left-bar-nav-item {
  margin: 0 0 var(--spacing-sm) 0;
  padding: 0;
}

.left-bar-nav-item a {
  display: block;
  font-size: 1rem;
  text-decoration: none;
  color: var(--text-body);
  border-radius: 6px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.left-bar-nav-item a:hover,
.left-bar-nav-item a.active {
  text-decoration: underline;
  color: var(--accent-primary);
}

.main-content {
  margin-left: 25vw;
}