.navigation {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    height: 100vh;
    padding: 20px;
    position: fixed;
    left: 0;
    top: 0;
}

.nav-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #34495e;
}

.nav-header h2 {
    margin: 0;
    font-size: 24px;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu li {
    margin-bottom: 10px;
}

.nav-menu li a {
    color: #ecf0f1;
    text-decoration: none;
    display: block;
    padding: 12px 15px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.nav-menu li a:hover {
    background-color: #34495e;
}

.nav-menu li.active a {
    background-color: #3498db;
    font-weight: bold;
}
