body {
font-family: system-ui, sans-serif;
margin: 0;
padding: 0;
background-color: #fefefe;
color: #1e1e1e;
line-height: 1.7;
}

header {
background-color: #ffffff;
border-bottom: 1px solid #ddd;
padding: 24px;
text-align: center;
}

header h1 {
font-size: 2rem;
color: #006699;
margin-bottom: 10px;
}

header img {
max-width: 100%;
height: auto;
border-radius: 12px;
}

main {
max-width: 850px;
margin: auto;
padding: 24px;
}

main h2 {
color: #004466;
font-size: 1.3rem;
margin-top: 36px;
}

main p,
main ul {
margin-bottom: 24px;
}

ul {
padding-left: 20px;
}

ul li {
margin-bottom: 10px;
}

a {
color: #007acc;
text-decoration: none;
}

a:hover {
text-decoration: underline;
}

footer {
text-align: center;
font-size: 0.9rem;
color: #666;
padding: 20px;
margin-top: 40px;
border-top: 1px solid #ddd;
background-color: #fafafa;
}