/* Hamburger icon styles */
.hamburger {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 30px;
    height: 24px;
    cursor: pointer;
    z-index: 1001;
  }
  
  .hamburger span {
    display: block;
    position: absolute;
    height: 4px;
    width: 100%;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    left: 0;
    transform-origin: center;
  }

  .hamburger.light span {
    background-color: black;
  }
  
  .hamburger.dark span {
    background-color: white;
  }

  .hamburger span {
    transition: background-color 0.3s ease;
  }
  
  /* Stack the bars */
  .hamburger span:nth-child(1) {
    top: 0;
  }
  
  .hamburger span:nth-child(2) {
    top: 10px;
  }
  
  .hamburger span:nth-child(3) {
    top: 20px;
  }
  
  /* === Toggle Animation === */
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 10px; /* center the rotated bar */
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 10px; /* center the rotated bar */
  }  
  
  /* Sidebar base */
.sidebar {
    font-family: 'Helvetica Neue';
    font-size: 1.0em;
    position: fixed;
    top: 0;
    left: -400px;
    width: 260px;
    max-height: 100vh;
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(10px); /* ✨ elegant blur */
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
    transition: left 0.4s ease;
    z-index: 999;
    padding: 100px 30px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
    scroll-behavior: smooth;
    overscroll-behavior: contain; /* Optional: prevents pull-to-refresh on mobile */
  }

  .sidebar::-webkit-scrollbar {
    width: 0;
    background: transparent;
  }
  
  /* Show sidebar */
  .sidebar.active {
    left: 0;
  }
  
  /* Navigation list */
  .sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .sidebar li {
    margin-bottom: 24px;
    opacity: 0;
    transform: translateX(-10px);
  }

  /* Only animate when .slide-in class is present */
.sidebar li.slide-in {
    animation: slideIn 0.4s forwards;
  }
  
  .sidebar a {
    color: white;
    text-decoration: none;
    font-size: 1.25em;
    font-weight: 300;
    transition: color 0.2s ease, transform 0.2s ease, text-shadow 0.3s ease;
    position: relative;
  }
  
  .sidebar a:hover {
    color: #c56244;
    transform: translateX(2px);
    text-shadow: 0 0 6px rgba(197, 98, 68, 0.35);
  }
  
  .sidebar a::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    height: 2px;
    width: 0%;
    background-color: #c56244;
    transition: width 0.3s ease;
  }
  
  .sidebar a:hover::after {
    width: 100%;
  }  

  .sidebar-divider {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin: 20px 0;
  }
  
  .sidebar ul.sidebar-secondary li {
    margin-bottom: 20px;
    opacity: 0;
    transform: translateX(-10px);
  }
  
  /* Slide-in animation */
  @keyframes slideIn {
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 998;
  }
  
  .sidebar.active + .sidebar-overlay {
    opacity: 1;
    pointer-events: all;
  }

  #sidebar-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 998; /* one below sidebar, one above page */
    display: none;
  }
  
  #sidebar-backdrop.active {
    display: block;
  }
  
  .has-submenu > .submenu {
    display: none;
    list-style: none;
    padding-left: 15px;
    padding-top: 20px;
  }

  .has-submenu.expanded > .submenu {
    display: block;
  }

  .submenu li a {
    font-size: 0.95em;
    color: #ddd;
  }

  .submenu li a:hover {
    color: #c56244;
  }