.page-main { padding: 2rem; max-width: 1100px; margin: 0 auto; }
.narrow-page-main { padding: 2rem; max-width: 400px; margin: 0 auto; }
.admin-page-main { padding: 2rem; max-width: 900px; margin: 0 auto; }
.content-narrow { max-width: 700px; }
.back-link { text-decoration: none; color: #007bff; font-size: 1.1rem; }
.page-title-spaced { margin-top: 1rem; }
.site-footer { text-align: center; padding: 0.5rem; margin-top: 1rem; border-top: 1px solid #ddd; color: #666; }
.form-response-error { color: red; }
.form-response-success { color: green; font-weight: bold; }
.admin-error { color: red; margin-bottom: 1rem; }
.admin-model-users { margin-bottom: 2rem; }
.admin-add-user-form { margin-top: 0.5rem; }
.admin-nav { margin-bottom: 1rem; }