* {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }

      :root {
        --k12dark: #1B1026;
        --k12blue: #2CBFBF;
        --k12purple: #412859;
        --k12darkpurple: #2B1D40;
        --k12litegreen: #03A64A;

      }

      body,
      html {
        height: 100%;
        width: 100%;
        font-family: Arial, sans-serif;
      }

      header {
        padding:10px 40px; margin:0;
        box-sizing: border-box;
        background-image: url(/img/k12-background-image.jpg);
        background-repeat: none;
        background-size: cover;
        width: 100%;
        min-height:40px;
        background-color: #555;
        color:white;
      }
      .container {
        display: flex;
        height: 100vh;
        overflow: hidden;
        transition: all 0.3s ease;
      }

      /* Sidebar */
      .sidebar {
        width: 250px;
        background-color: var(--k12dark);
        color: white;
        padding: 20px;
        position: relative;
        transform: translateX(0);
        transition: transform 0.3s ease;
        z-index: 2;
        flex-shrink: 0;
      }

      .sidebar.hidden {
        transform: translateX(-90%);
      }

      .sidebar.gone{
        display:none;
      }

      .menu-item {
        margin: 20px 0;
        white-space: nowrap;
      }

      .menu-item a {
        color: white;
        text-decoration: none;
      }

      .menu-item a.active, .menu-item a.active:hover  {color: var(--k12blue);}
       .menu-item a:hover {
        color: var(--k12blue);
      }

      section { margin: 2em 0;}

      /* Toggle Button */
      .toggle-btn {
        position: absolute;
        top: 20px;
        right: -15px;
        background-color: var(--k12blue);
        border-radius: 50%;
        color: white;
        width: 30px;
        height: 30px;
        text-align: center;
        line-height: 30px;
        cursor: pointer;
        user-select: none;
        z-index: 3;
        transition: transform 0.3s ease;
      }

      .sidebar.hidden .toggle-btn {
        transform: rotate(180deg);
      }

      /* Main Content */
      .main-content {
        flex-grow: 1;
        background-color: #f2f2f2;
        padding: 20px;
        transition: all 0.3s ease;
        height:auto;
       min-height: 100vh;
       overflow-y: auto;

      }

      .main-content ul li { padding-left: 40px;}

      p { max-width: 800px; text-wrap: auto;line-height: 1.5; font-size: 1rem; }

     

      img.image-left {float: left; margin-right: 20px; margin-bottom: 20px;}
        img.image-right {float: right; margin-left: 20px; margin-bottom: 20px;}

      h1, h2, h3 {
        margin-bottom: 20px;
        margin-top:10px;
        color: var(--k12purple);
      }

      header h2, header h3 {color: white;}

      p {
        margin-bottom: 15px;
      }
ul {margin-left: 20px; margin-bottom: 40px;}
      li {line-height: 2em;}

      a.btn {
        padding: 10px 15px;
        font-size: 16px;
        cursor: pointer;
        margin-bottom: 20px;
      }

      footer {
        z-index: 100; 
        width: 100vw;
        /* background-color:rgba(255, 99, 71, 0.2); */
        position: absolute; 
        bottom:0; 
        text-align: right;
        padding-top: 10px;
    }
       footer>button { width: 60px; 
        height:60px; 
        margin-right:40px; 
        font-size: 2em; 
        content: " + "
      }

      footer>button.swap {
        background-color: var(--k12purple);
        content: " - ";
        color:white;
      }