/* Header Sticky Styles */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: white;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  height: 4rem; /* 64px */
}

/* Main content adjustments */
.main-content {
  transition: margin-left 0.3s ease-in-out;
  padding-top: 5rem; /* 1rem + 4rem header height */
}

body.sidebar-open .main-content {
  margin-left: 16rem;
}