* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    line-height: 1.6;
    padding-bottom: 4em;
}

a {
    color: #80cbc4;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #4db6ac;
}

header {
    background-color: #1f1f1f;
    padding: 1.5em;
    text-align: center;
    border-bottom: 1px solid #333;
}

header h1 {
    font-size: 2em;
    color: #ffffff;
}

nav {
    margin-top: 1em;
}

nav a {
    color: #ffcc80;
}

main {
    max-width: 900px;
    margin: 2em auto;
    padding: 0 1em;
}

.device-list {
    list-style-type: none;
    padding: 0;
    margin-top: 1em;
}

.device-list li {
    background-color: #1e1e1e;
    margin: 0.5em 0;
    padding: 1em;
    border-radius: 8px;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.device-list li:hover {
    background-color: #2a2a2a;
}

.device-list a {
    font-size: 1.1em;
    display: block;
}

.device-details {
    background-color: #1e1e1e;
    padding: 2em;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.device-details h2 {
    color: #80cbc4;
    margin-top: 1.5em;
}

.device-details ul {
    list-style-type: square;
    margin-left: 1.5em;
}

footer {
    background-color: #1a1a1a;
    color: #888;
    text-align: center;
    padding: 1em;
    position: relative;
    bottom: 0;
    width: 100%;
    border-top: 1px solid #333;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.5em;
    }

    .device-details {
        padding: 1em;
    }
}