body {
font-family: Arial, sans-serif;
line-height: 1.7;
margin: 0;
padding: 0;
background-color: #f8f9fa;
color: #222;
}

header {
padding: 20px;
background-color: #fff;
text-align: center;
box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

header h1 {
font-size: 2rem;
margin-bottom: 10px;
color: #000;
}

main {
padding: 20px;
max-width: 850px;
margin: auto;
background-color: #fff;
}

h2 {
font-size: 1.5rem;
margin-top: 30px;
color: #111;
}

p {
margin: 16px 0;
font-size: 1rem;
}

ul, ol {
margin: 10px 0 20px 20px;
padding-left: 15px;
}

li {
margin-bottom: 8px;
}

img {
max-width: 100%;
height: auto;
border-radius: 8px;
margin-top: 15px;
margin-bottom: 25px;
display: block;
}

details {
background: #f1f1f1;
padding: 10px 15px;
border-left: 3px solid #0077cc;
margin-bottom: 12px;
border-radius: 4px;
}

details summary {
font-weight: bold;
cursor: pointer;
}

a {
color: #0077cc;
text-decoration: none;
font-weight: 500;
}

a:hover {
text-decoration: underline;
}

footer {
padding: 20px;
background-color: #f1f1f1;
text-align: center;
font-size: 0.9rem;
color: #444;
margin-top: 40px;
border-top: 1px solid #ddd;
}

/* CLS improvements */
img[loading="lazy"] {
aspect-ratio: 16 / 9;
background-color: #ddd;
}