.toc {
    border: 1px solid #ccc;
    padding: 10px;
    margin-bottom: 20px;
    background: #f9f9f9;
}

.toc h2 {
    margin-top: 0;
}

.toc ul {
    list-style-type: none;
    padding-left: 0;
}

.toc li {
    margin: 5px 0;
}

.toc a {
    text-decoration: none;
    color: #0073e6;
}
body {
    margin: 0;
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
}
.header {
    background: #00274d;
    color: white;
    padding: 15px;
    text-align: left;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}
.header img {
    height: 50px;
}
.header a {
    color: white;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
}
.header_banner {
    background: #00274d;
    color: white;
    padding: 15px;
    text-align: left;
    top: 0;
    width: 100%;
    z-index: 1000;
    align-items: center;
    position: fixed;
    justify-content: center;
    gap: 15px;
}
.header_banner img {
    height: 50px;
}
.header_banner a {
    color: white;
    text-decoration: none;
    font-size: 1.2em;
    font-weight: bold;
}
.container {
    display: flex;
    margin-top: 0px;
    padding-right: 0px;
    padding-left: 0px;
    margin-right: 0px;
    margin-left: 0px;
    max-width: 700 px
}
 .sidebar {
    width: 250px;
    background: #003366;
    padding: 15px; 
    /* height: calc(100vh - 80px); */
    height: 100%;
    position: fixed;
    top: 0px;
    color: white;
    transition: transform 0.3s ease-in-out;
}

.sidebar a {
    display: block;
    padding: 12px;
    text-decoration: none;
    color: white;
    background: #004c99;
    border-radius: 5px;
    margin-bottom: 8px;
    text-align: center;
    font-weight: bold;
}
.sidebar a.active, .sidebar a:hover {
    background: #ffcc00;
    color: #003366;
}
.content {
    margin-left: 270px;
    padding: 20px;
    width: calc(100% - 270px);
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-top: 10px;
    flex-grow: 1;
    overflow-y: auto;
}
.content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}
/* Menu button for mobile */
.menu-btn {
    display: none;
    font-size: 24px;
    background: #333;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
}
.special {
    font-size: 24px;   /* you can use px, em, rem, % */
  }

.columns {
    display: flex;              /* activate flexbox */
    justify-content: space-between; /* spread items across full width */
  }
  .columns p {
    flex: 1;                    /* each takes equal width */
    text-align: center;         /* center text inside each column */
  }
  .columns p:first-child {
    text-align: left;
  }
  .columns p:last-child {
    text-align: right;
  }

@media (max-width: 768px) {
    /* .sidebar {
        width: 200px;
        position: fixed;
        left: -200px;
        top: 80px;
        height: calc(100vh - 80px);
        background: #222;
        z-index: 1000;
    } */
    .sidebar {
        width: auto;
        background: #003366;
        padding: 15px; 
        /* height: calc(100vh - 80px); */
        height: 100%;
        position: fixed;
        top: 20%;
        color: white;
        left: -200px;
        z-index: 1000;
        /* transition: transform 0.3s ease-in-out; */
    }
    .content {
        margin-left: 0px;
        padding: 0px;
        width: 100%;
        margin-top: 20%;
        /* background: white;
        border-radius: 10px;
        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        margin-top: 10px;
        flex-grow: 1;
        overflow-y: auto; */
    } 

    .sidebar.show {
        left: 0;
    }

    .menu-btn {
        display: block;
        margin-top: 0%;
        position: fixed;
        top:0%;
    }
}