* { box-sizing: border-box; }
html{ margin: 0; padding: 0; width: 100%; overflow-x: hidden; font-family: Arial, sans-serif; }
a { text-decoration: none; color: inherit; }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.7;
    background-color: #f8f9fa;
    color: #333;
    overflow-x: hidden;
}
header {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 40px 20px;
}
header h1 { margin: 0; font-size: 2.5em; }
nav {
    background-color: #34495e;
    padding: 15px 0;
    text-align: center;
    overflow-x: auto;
}
nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1em;
}
nav a:hover { text-decoration: underline; }
.container {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
section { margin-bottom: 30px; }
h2 { color: #2c3e50; border-bottom: 3px solid #3498db; padding-bottom: 5px; }
h3 { color: #2980b9; }
pre {
    background-color: #f1f1f1;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    font-family: Consolas, Monaco, monospace;
    border-left: 4px solid #3498db;
}
code {
    background-color: #eee;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: Consolas, Monaco, monospace;
    color: #d35400;
}
ul, ol { margin-left: 20px; }
.example {
    background-color: #e8f4fc;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border: 1px dashed #3498db;
}
footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #7f8c8d;
    font-size: 0.9em;
}
@media (max-width: 600px) {
    .container { padding: 15px; margin: 10px; }
    header h1 { font-size: 2em; }
}