:root {
      --primary: #0077b6;
      --primary-dark: #023e8a;
      --primary-light: #90e0ef;
      --secondary: #00b4d8;
      --accent: #48cae4;
      --white: #ffffff;
      --light: #f8f9fa;
      --gray: #6c757d;
      --dark: #212529;
      --success: #28a745;
      --warning: #ffc107;
      --danger: #dc3545;
      --info: #3b82f6;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
      --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
      --transition: all 0.3s ease;
      --border-radius: 12px;
      --border-color: #ccc;
      --border: #dee2e6;
      --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    /* Base Styles */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      scrollbar-width: thin;
      scrollbar-color: var(--primary-light) transparent;
      font-family: 'Poppins', sans-serif;
    }

    html {
      overflow-y: scroll;
    }

    body, button, input, select, textarea {
      font-family: 'Poppins', sans-serif;
    }

    body {
      background-color: var(--light);
      color: var(--dark);
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      line-height: 1.6;
      margin: 0;
      padding: 0;
      overflow: hidden;
    }

    /* Scrollbar Styles */
    ::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }

    ::-webkit-scrollbar-track {
      background: transparent;
    }

    ::-webkit-scrollbar-thumb {
      background-color: var(--primary-light);
      border-radius: 4px;
    }

    /* Header Styles */
    .header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 24px;
        background-color: var(--white);
        box-shadow: var(--shadow-sm);
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        transition: var(--transition);
    }

    .header-text {
      font-size: 18px;
      font-weight: 600;
      color: var(--primary-dark);
      transition: var(--transition);
      text-align: center;
      flex-grow: 1;
      margin-left: 280px;
    }

    .hamburger {
      display: none;
      padding: 8px;
      border-radius: 50%;
      transition: var(--transition);
      position: absolute;
      left: 24px;
      cursor: pointer;
    }

    .hamburger:hover {
      background-color: rgba(0, 0, 0, 0.05);
    }

    .hamburger img {
      width: 22px;
      height: 22px;
      opacity: 0.8;
    }

    /* User Profile */
    .user-info {
      position: absolute;
      right: 24px;
    }

    .user-profile {
      display: flex;
      align-items: center;
      padding: 6px;
      border-radius: 50%;
      background-color: var(--light);
      cursor: pointer;
      transition: var(--transition);
    }

    .user-profile:hover {
      background-color: var(--primary-light);
    }

    .user-profile img {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      object-fit: cover;
    }

    /* Sidebar Styles */
    .sidebar {
      width: 280px;
      height: 100vh;
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      color: var(--white);
      position: fixed;
      top: 0;
      left: 0;
      padding: 20px 0;
      transition: transform 0.3s ease;
      transform: translateX(-280px);
      z-index: 1001;
      overflow-y: auto;
      box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
      transform: translateX(0);
    }

    .sidebar-header {
      display: flex;
      align-items: center;
      padding: 0 20px 20px;
      margin-bottom: 10px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      cursor: pointer;
      justify-content: center;
    }

    .sidebar-logo {
      width: 120px;
      height: 45px;
    }

    .sidebar-header h2 {
      font-size: 20px;
      font-weight: 600;
      color: var(--white);
      margin: 0;
    }

    .sidebar-menu {
      list-style: none;
      padding: 0 10px;
    }

    .sidebar-menu li {
      margin: 4px 0;
      position: relative;
    }

    .sidebar-menu li a {
      display: flex;
      align-items: center;
      padding: 12px 16px;
      color: rgba(255, 255, 255, 0.9);
      text-decoration: none;
      border-radius: var(--border-radius);
      transition: var(--transition);
    }

    .sidebar-menu li a i {
      width: 24px;
      margin-right: 12px;
      text-align: center;
      font-size: 16px;
    }

    .sidebar-menu li a:hover {
      background-color: rgba(255, 255, 255, 0.1);
      color: var(--white);
    }

    .sidebar-menu li a.active {
      background-color: var(--accent);
      color: var(--primary-dark);
      font-weight: 500;
    }

    .sidebar-menu li a .arrow {
      margin-left: auto;
      font-size: 12px;
      transition: var(--transition);
    }

    /* Submenu Styles */
    .sidebar-menu ul.sub-menu {
      display: block;
      padding-left: 16px;
      margin-top: 4px;
      background-color: rgba(0, 0, 0, 0.1);
      border-radius: var(--border-radius);
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, opacity 0.2s ease;
      opacity: 0;
      padding-bottom: 30px;
    }

    .sidebar-menu ul.sub-menu li {
        position: relative;
        padding-left: 0;
        margin-left: 35px;
        width: 100%;
        list-style: none;
        text-align: left;
    }
    .sidebar-menu ul.sub-menu {
        padding-left: 0;
        text-align: center;
    }
    
    .sidebar-menu ul.sub-menu li:last-child {
        padding-bottom: 15px;
    }
    
    .sidebar-menu ul.sub-menu li::before {
        content: "‣";
        position: absolute;
        left: -15px;
        top: -2px;
        color: var(--accent);
        font-size: 30px;
    }
    
    .sidebar-menu ul.sub-menu li a {
        display: inline-block;
        padding: 8px 16px;
    }

    .sidebar-menu ul.sub-menu li a {
      padding: 10px 16px;
      font-size: 14px;
       margin-left: 10px; 
       margin-right: 10px;
    }

    .sidebar-menu li.active > a .arrow {
      transform: rotate(180deg);
    }

    .sidebar-menu li.active > .sub-menu {
      max-height: 500px;
      opacity: 1;
      transition: max-height 0.5s ease-in, opacity 0.3s ease 0.1s;
    }

    /* Profile Dialog */
    .profile-dialog {
      display: none;
      position: absolute;
      top: 60px;
      right: 20px;
      background-color: var(--white);
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-lg);
      padding: 16px;
      width: 240px;
      z-index: 1003; /* Increased z-index to be above overlay */
    }

    .profile-dialog.active {
      display: block;
    }

    .profile-dialog-img {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      margin: 0 auto 12px;
      display: block;
      object-fit: cover;
    }

    .user-name {
      font-size: 16px;
      font-weight: 600;
      text-align: center;
      margin-bottom: 16px;
      color: var(--dark);
    }

    .profile-dialog-menu {
      list-style: none;
    }

    .profile-dialog-menu li {
      margin: 6px 0;
    }

    .profile-dialog-menu li a {
      display: flex;
      align-items: center;
      padding: 8px 12px;
      color: var(--gray);
      text-decoration: none;
      border-radius: 6px;
      font-size: 14px;
      transition: var(--transition);
    }

    .profile-dialog-menu li a i {
      width: 20px;
      margin-right: 10px;
      font-size: 14px;
    }

    .profile-dialog-menu li a:hover {
      background-color: var(--light);
      color: var(--primary);
    }

    /* Sidebar Overlay */
    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        display: none;
        z-index: 1000; /* Lower than profile overlays */
        backdrop-filter: blur(2px);
    }

    /* Main Content */
    .main-content {
      margin-left: 280px;
      padding-top: 50px;
      min-height: calc(100vh - 70px);
      transition: margin-left 0.3s ease;
      overflow-y: auto;
      position: relative;
      background-color: var(--light);
    }

    /* Progress Overlay */
    .progress-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      backdrop-filter: blur(2px);
    }

    .progress-circle {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      border: 4px solid rgba(255, 255, 255, 0.3);
      border-top-color: var(--accent);
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    /* Mobile-specific improvements */
    @media (max-width: 768px) {
      .sidebar {
        transform: translateX(-280px);
      }

      .sidebar.open {
        transform: translateX(0);
      }

      .hamburger {
        display: flex;
      }

      .header-text {
        margin-left: 40px;
        margin-right: 40px;
      }

      .main-content {
        width: 100%;
        margin-left: 0;
      }
      
      .sidebar.open + .main-content {
        margin-left: 280px;
        width: calc(100% - 280px);
      }

      .profile-dialog {
        right: 10px;
        width: 220px;
      }
      
      .sidebar-menu ul.sub-menu li::before {
          font-size: 16px;
          top: 8px;
      }
      
      .header-text {
          margin-left: 40px;
        }
    }

    @media (min-width: 769px) {
      .sidebar {
        transform: translateX(0);
      }

      .main-content {
        margin-left: 280px;
      }
    }
    
    /* Update submenu styles for smoother transitions */
    .sidebar-menu ul.sub-menu {
        display: block;
        padding-left: 16px;
        margin-top: 4px;
        background-color: rgba(0, 0, 0, 0.1);
        border-radius: var(--border-radius);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
        opacity 0.3s ease,
        padding 0.3s ease;
        opacity: 0;
        padding-top: 0;
        padding-bottom: 0;
    }

    .sidebar-menu li.active > .sub-menu {
        max-height: 500px;
        opacity: 1;
        padding-top: 8px;
        padding-bottom: 8px;
        transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
        opacity 0.3s ease 0.1s,
        padding 0.3s ease;
    }

    /* Arrow rotation animation */
    .sidebar-menu li a .arrow {
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-280px);
            position: fixed;
            z-index: 1001;
        }
    
        .sidebar.open {
            transform: translateX(0);
        }
    
        .hamburger {
            display: flex;
        }
    }

    /* Main sidebar icons */
    .sidebar-menu > li > a > i.main-icon {
        font-size: 18px;
        width: 22px;
        text-align: center;
    }

    /* Submenu icons */
    .sidebar-menu .sub-menu i.sub-icon {
        font-size: 14px;
        margin-right: 8px;
        opacity: 0.85;
    }

    /* Arrow smooth rotation */
    .sidebar-menu li > a .arrow {
        transition: transform 0.3s ease;
    }

    .sidebar-menu li.active > a .arrow {
        transform: rotate(180deg);
    }

    /* Smooth submenu animation */
    .sidebar-menu .sub-menu {
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        transition:
            max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
            opacity 0.3s ease,
            padding 0.3s ease;
        padding-top: 0;
        padding-bottom: 0;
    }

    /* Submenu item */
    .sidebar-menu .sub-menu li a {
        display: flex;
        align-items: center;
        padding: 12px 18px;
        font-size: 15px;             
        line-height: 1.4;
        color: rgba(255,255,255,0.9);
    }

    /* Submenu icon */
    .sidebar-menu .sub-menu li a i.sub-icon {
        font-size: 15px;            
        width: 20px;
        margin-right: 10px;
        text-align: center;
        opacity: 0.9;
    }

    .sidebar-menu .sub-menu li a.active {
        color: var(--primary-dark);
        background-color: var(--accent);
    }

    .sidebar-menu li a,
    .profile-dialog-menu li a,
    .hamburger,
    .user-profile,
    button {
        -webkit-tap-highlight-color: transparent;
    }