body {
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
    padding: 40px 20px;
    max-width: 800px;
    margin: auto;
    background: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

h1, h2, h3 {
    color: #2c3e50;
    margin-top: 1.5em;
}

a {
    color: #0077cc;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

ul, ol {
    padding-left: 20px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    border-radius: 6px;
}

code {
    background: #eef;
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
}

pre {
    background: #f0f0f0;
    padding: 10px;
    overflow-x: auto;
    border-radius: 6px;
}

hr {
    border: none;
    border-top: 1px solid #ddd;
    margin: 40px 0;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: #444;
}
input[type=checkbox] {
    transform: scale(1.3);
    margin-right: 8px;
}