body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.7;
}

.container {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}

header {
    background: #2563eb;
    color: white;
    padding: 50px 20px;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

.subtitle {
    margin-top: 10px;
    font-size: 1.1rem;
    opacity: 0.9;
}

section {
    background: white;
    margin: 24px 0;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

h2 {
    color: #2563eb;
    margin-top: 0;
}

ul {
    padding-left: 20px;
}

a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    color: #666;
    padding: 30px 20px;
    font-size: 0.9rem;
}