@media (max-width: 900px) {
    h1 {
        font-size: 1.6em;
        padding: 12px;
    }

    a {
        font-size: 1.3em;
    }

    .container {
        margin: 20px auto;
        padding: 15px;
    }

    footer {
        font-size: 1em;
        padding: 12px;
    }

    .admin-link, .theme-btn {
        position: fixed;
        top: 10px;
        width: 45%;
        padding: 12px;
        text-align: center;
        border-radius: 6px;
    }

    .theme-btn { left: 5%; right: auto; }
    .admin-link { right: 5%; left: auto; }
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
    color: #000;
    display: flex;
    flex-direction: column;
}

body.dark { background: #121212; color: #eee; }
.container {
    width: 90%;
    max-width: 1200px;
    margin: 50px auto;
    padding: 20px;
    flex: 1;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    margin: 10px 0;
}

a {
    text-decoration: none;
    color: #005cc5;
    font-size: 1.1em;
}
a:hover { color: #000; }

body.dark a {
    color: #81c7ff;
}
body.dark a:hover { color: #fff; }

.back {
    display: inline-block;
    margin-top: 20px;
    text-decoration: none;
    color: #555;
}
body.dark .back {
    color: #999;
}

body.dark .back:hover {
    color: #fff;
}
.back:hover { color: #000; }

footer {
    text-align: center;
    padding: 15px;
    background: #eee;
    color: #000;
}

body.dark footer {
    background: #1e1e1e;
    color: #eee;
}