* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #1f2433;
    background: linear-gradient(135deg, #dbeafe, #ede9fe);
}

.wrapper {
    width: min(900px, 90%);
    margin: 50px auto;
    padding: 35px;
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 12px 30px rgba(31, 36, 51, 0.18);
}

h1 {
    color: #312e81;
}

h2 {
    margin-top: 30px;
    color: #4338ca;
}

p {
    line-height: 1.7;
}

pre {
    overflow-x: auto;
    padding: 18px;
    background: #111827;
    color: #f9fafb;
    border-radius: 12px;
}

a {
    color: #4338ca;
    font-weight: bold;
    cursor: pointer;
}

footer {
    margin-top: 40px;
    padding-top: 18px;
    border-top: 1px solid #c7d2fe;
    text-align: center;
}

footer a {
    display: inline-block;
    margin: 6px 10px;
    padding: 8px 12px;
    text-decoration: none;
    background: #eef2ff;
    border-radius: 8px;
}

footer a:hover {
    background: #ddd6fe;
}