* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }

header { background: #f8f9fa; border-bottom: 1px solid #e0e0e0; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
h1 { margin: 0; font-size: 1.5rem; }
#auth-controls { display: flex; gap: 1rem; align-items: center; }
.btn { padding: 0.5rem 1rem; border: none; border-radius: 4px; background: #0066cc; color: white; cursor: pointer; }
.btn:hover { background: #0052a3; }
.btn-logout { background: #dc3545; }
.btn-logout:hover { background: #c82333; }
main { max-width: 800px; margin: 2rem auto; padding: 0 2rem; }
section { background: #f5f5f5; padding: 1.5rem; border-radius: 4px; }
section p { margin: 0.75rem 0; }
code { background: #e9ecef; padding: 0.2rem 0.5rem; border-radius: 3px; font-size: 0.85rem; }

@media (max-width: 600px) {
    header { flex-direction: column !important; align-items: flex-start !important; gap: 1rem !important; }
    #auth-controls { flex-direction: column !important; width: 100%; }
    .btn { width: 100%; }
}