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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f5f7fa;
    color: #1a202c;
    min-height: 100vh;
}

.page-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.page-nav {
    padding: 1.25rem 0;
    border-bottom: 1px solid #e2e8f0;
    margin-bottom: 2rem;
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: #1a1a2e;
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav-logo span {
    color: #2b6cb0;
}

.page-content h1 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1a1a2e;
}

.updated {
    color: #718096;
    font-size: 0.85rem;
    margin-bottom: 1.75rem;
}

.page-content h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.page-content p {
    line-height: 1.7;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.page-content ul {
    margin: 0.5rem 0 1rem 1.5rem;
    line-height: 1.7;
    font-size: 0.95rem;
}

.page-content li {
    margin-bottom: 0.35rem;
}

@media (max-width: 600px) {
    .page-content h1 {
        font-size: 1.35rem;
    }
}