body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #fafafa;
    color: #333;
}
nav {
    background-color: #f0f0f0;
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
}
nav a {
    margin-right: 20px;
    text-decoration: none;
    color: #333;
    font-weight: bold;
}
nav a:hover {
    color: #007bff;
}
nav a.active {
    color: #007bff;
    border-bottom: 2px solid #007bff;
    padding-bottom: 5px;
}
.lang-switcher {
    float: right;
    margin-top: 6px;
}
.lang-switcher a {
    margin-left: 8px;
    color: #333;
    text-decoration: none;
    font-weight: bold;
}
.lang-switcher a:hover {
    color: #007bff;
}
.lang-switcher .active-lang {
    color: #007bff;
    text-decoration: underline;
}
.container {
    max-width: 900px;
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}
h1, h2 {
    color: #222;
}
p, li {
    line-height: 1.75;
    color: #444;
}
ul {
    margin-left: 20px;
}
code {
    color: #d63384;
    background-color: #f8f9fa;
    padding: 2px 4px;
    border-radius: 4px;
}
.app {
    border: 1px solid #ddd;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    background: #fff;
}
.app a {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}
.app a:hover {
    background-color: #0056b3;
}