body {
    font-family: sans-serif;
    background-color: #f0f8ff; /* Светло-голубой фон */
    color: #333;
    margin: 0;
    padding: 15px;
}
.container {
    width: 100%;
}
h1 {
    font-size: 1.8em;
    color: #005a9c;
}
.device-info {
    background-color: #005a9c;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-top: 10px;
}
.nav {
    display: flex;
    flex-direction: column;
}

}
.nav a {
    background-color: #e6e6e6;
    padding: 10px;
    margin-bottom: 5px;
    text-align: center;
    text-decoration: none;
    color: #333;
    border-radius: 3px;
}