body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
}
.header {
    background-color: #0E1A77;
    padding: 20px;
    text-align: center;
    color: white;
}
.menu {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin: 20px 0;
    padding-left: 20px;
}
.menu button {
    background-color: #0E1A77;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: block;
    font-size: 12px;
    margin: 4px 0;
    transition-duration: 0.4s;
    cursor: pointer;
    border-radius: 12px;
}
.menu button:hover {
    background-color: white;
    color: #0E1A77;
    border: 2px solid #0E1A77;
}
.content {
    margin: 20px;
}
.iframe-container {
    margin-top: 20px;
}
iframe {   
    width: 100%;
    height: 1000px;                  
    border: 1px solid #ccc;
    border-radius: 12px;
    display: none;
}
.active {
    display: block;
}