.main-content-wrapper {
  transition: margin-left 0.3s ease-in-out;
}

/* New generic topic sidebar */
#topic-sidebar {
  background-color: var(--card-bg);
  width: 280px;
  max-width: 90vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1001;
  padding: 1.5rem;
  padding-top: 2rem; /* Will be scrollable */
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.3s ease-in-out;
  border-right: 1px solid var(--border-color);
}

#topic-sidebar .sidebar-title {
  margin-top: 0;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  font-family: "Lora", serif;
  font-size: 1.4rem;
  color: var(--green);
  text-align: left;
  border-bottom: 2px solid var(--green);
}

#topic-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#topic-nav li {
  margin-bottom: 0.25rem;
}

#topic-nav a {
  display: block;
  padding: 0.75rem 1rem;
  text-decoration: none;
  border-radius: 8px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease;
}

#topic-nav a:hover,
#topic-nav a.active {
  background-color: var(--accent-color);
  color: white;
}

/* Sidebar Toggle for Mobile */
#topic-sidebar-toggle {
  display: block;
  position: fixed;
  top: 70px;
  left: 15px;
  z-index: 1;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 8px;
  width: auto;
  height: 40px;
  padding: 0 1rem;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

#sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
}

#sidebar-overlay.is-open {
  display: block;
}

/* Desktop Layout */
@media (min-width: 992px) {
  .main-content-wrapper {
    margin-left: 3%; /* Make space for the 280px sidebar */
    padding-left: 10px; /* Add the requested 10px gap */
  }

  #topic-sidebar {
    margin-top: 62px;
    transform: translateX(0);
    width: 18%; /* fixed width for desktop */
    height: 97%;
    z-index: 0;
  }
  #topic-sidebar-toggle,
  #sidebar-overlay {
    display: none; /* Not needed on desktop */
  }
}

/* Mobile Layout */
@media (max-width: 991px) {
  #topic-sidebar.is-open {
    transform: translateX(0);
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.2);
  }
}