* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: #fafafa;
    max-width: 760px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

header nav {
    display: flex;
    gap: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid #e5e5e5;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

header nav a {
    color: #555;
    text-decoration: none;
    font-size: 0.95rem;
}

header nav a:hover { color: #1a1a1a; }
header nav a.brand { font-weight: 700; color: #1a1a1a; }

h1 { font-size: 1.9rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.75rem; }

.tagline { color: #666; margin-bottom: 1.5rem; font-size: 1.05rem; }

.notice {
    background: #f0f0f0;
    border-left: 3px solid #999;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-radius: 4px;
}

.notice h2 { margin-top: 0; font-size: 1.05rem; }

ul.topics {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

ul.topics li {
    padding: 0.6rem 0;
    border-bottom: 1px solid #eee;
    font-size: 0.95rem;
}

ul.topics li:last-child { border-bottom: none; }

ul.topics strong { color: #1a1a1a; }

p { margin-bottom: 1rem; }
a { color: #1a6ac7; }

footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e5e5;
    color: #888;
    font-size: 0.85rem;
}

footer a { color: #888; }