
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: url('../images/bckimg.jpg') no-repeat center center fixed;
    background-size: cover;
}
.header {
    background-color: #006666;
    color: white;
    padding: 15px 20px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    z-index: 999;
}
.sidebar {
    background-color: #004d4d;
    color: white;
    width: 220px;
    position: fixed;
    top: 50px;
    bottom: 0;
    padding: 20px;
    overflow-y: auto;
}
.sidebar ul {
    list-style: none;
    padding: 0;
}
.sidebar ul li {
    margin: 12px 0;
}
.sidebar ul li a {
    color: white;
    text-decoration: none;
    background-color: #0099cc;
    padding: 8px 12px;
    border-radius: 8px;
    display: block;
}
.sidebar ul li a:hover {
    background-color: #00b3e6;
}
.main-content {
    margin-left: 240px;
    margin-top: 70px;
    padding: 20px;
    background-color: rgba(255,255,255,0.85);
    border-radius: 10px;
    max-width: 800px;
}
.footer {
    position: fixed;
    bottom: 0;
    left: 220px;
    right: 0;
    background-color: #006666;
    color: white;
    text-align: center;
    padding: 10px;
}
