body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

section {
    padding: 2em 0;
    text-align: center;
}

#why-choose ul,
#courses ul {
    list-style: none;
    padding: 0;
}

#why-choose ul li,
#courses ul li {
    margin: 1em 0;
}

#how-it-works ol {
    padding: 0;
    list-style-position: inside;
}

blockquote {
    font-style: italic;
    margin: 1em auto;
    padding: 0.5em 1em;
    border-left: 5px solid #333;
    max-width: 600px;
}

blockquote cite {
    display: block;
    text-align: right;
    color: #555;
}

#cta .btn {
    display: inline-block;
    padding: 0.75em 1.5em;
    color: #fff;
    background: #333;
    text-decoration: none;
    border-radius: 5px;
    transition: background 0.3s;
}

#cta .btn:hover {
    background: #555;
}

footer {
    background: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

footer ul {
    list-style: none;
    padding: 0;
}

footer ul li {
    display: inline;
    margin: 0 1em;
}

footer ul li a {
    color: #fff;
    text-decoration: none;
}

footer ul li a:hover {
    text-decoration: underline;
}