/* Sidebar container */
.sidebar {
    width: 220px;
    background-color: #2c3e50;
    color: #ecf0f1;
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 60px;
    overflow-y: auto;
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}
.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.sidebar li {
    padding: 12px 20px;
}
.sidebar a {
    color: #ecf0f1;
    text-decoration: none;
    display: block;
}
.sidebar a:hover {
    background-color: #34495e;
    border-radius: 4px;
}
.main-content {
    margin-left: 240px; /* offset for sidebar */
    padding: 20px;
}
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .main-content {
        margin-left: 0;
    }
}