/* Sidebar styling */
.sidebar {
  flex: 0 0 260px;
  background-color: #343a40;
  color: white;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width 0.3s ease;
}

.sidebar-header {
  padding: 1rem;
  border-bottom: 1px solid #495057;
  margin-bottom: 0.5rem;
}

.sidebar-header h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 500;
}

.sidebar-content {
  padding: 0.5rem 0;
}

.nav-tree {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.nav-tree li {
  margin: 2px 0;
}

.nav-tree a {
  display: flex;
  align-items: center;
  color: #adb5bd;
  text-decoration: none;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.nav-tree a:hover {
  color: white;
  background-color: #495057;
}

.nav-tree a.active {
  color: white;
  background-color: #007bff;
}

.nav-tree a i {
  margin-right: 0.5rem;
  width: 16px;
  text-align: center;
}

/* Folder styling */
.folder > .folder-header {
  display: flex;
  align-items: center;
  color: #adb5bd;
  padding: 0.5rem 1rem;
  cursor: pointer;
  user-select: none;
  transition: all 0.2s;
}

.folder > .folder-header:hover {
  color: white;
  background-color: #495057;
}

.folder > .folder-header i {
  margin-right: 0.5rem;
  color: #ffc107;
  width: 16px;
  text-align: center;
}

.folder > .folder-content {
  display: none;
  margin-left: 0.5rem;
}

.folder.open > .folder-content {
  display: block;
}

/* Responsive sidebar */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 60px;
    bottom: 0;
    left: -260px;
    z-index: 1000;
    width: 260px;
    transition: left 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    background-color: #343a40;
  }

  .sidebar.active {
    left: 0;
  }

  .sidebar-toggle {
    display: block;
  }
  
  /* Enhance folder interact-ability on mobile */
  .folder > .folder-header {
    padding: 0.7rem 1rem;
  }
  
  .nav-tree a {
    padding: 0.7rem 1rem;
  }
}

/* Extra adjustments for very small screens */
@media (max-width: 480px) {
  .sidebar {
    width: 240px;
    left: -240px;
  }
  
  .sidebar-content {
    font-size: 0.95rem;
  }
  
  .nav-tree a {
    padding: 0.8rem 1rem;
  }
  
  /* Adjust header height and sidebar top position */
  .sidebar {
    top: 90px;
  }
}