/* style.css */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

nav {
    background-color: #2c3e50;
    padding: 15px 0;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    margin: 0 5px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #34495e;
}

nav a.active {
    background-color: #3498db;
}

.container {
    max-width: 900px;
    margin: 30px auto;
    padding: 30px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #2c3e50;
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: 3px solid #3498db;
    padding-bottom: 10px;
}

h1:first-child {
    margin-top: 0;
}

h3 {
    color: #34495e;
    margin-top: 20px;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
}

ul {
    margin-left: 25px;
    margin-bottom: 15px;
}

ul li {
    margin-bottom: 8px;
}

.code {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 20px;
    border-radius: 5px;
    margin: 15px 0;
    overflow-x: auto;
}

.code code {
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.output {
    background-color: #ecf0f1;
    padding: 15px;
    border-left: 4px solid #3498db;
    margin: 15px 0;
    border-radius: 3px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table th {
    background-color: #3498db;
    color: white;
    padding: 12px;
    text-align: left;
}

table td {
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

table tr:hover {
    background-color: #f5f5f5;
}