.extension-advanced { border-top: 1px solid var(--border, #303740); margin-top: 16px; padding-top: 12px; }
.extension-advanced > summary { cursor: pointer; font-weight: 600; padding-block: 6px; }
.extension-fallback h3 { font-size: 14px; margin: 12px 0; }
.extension-fallback > .form-grid { margin-top: 12px; }
.extension-fallback-toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: var(--control-height, 38px); border: 1px solid var(--border, #303740); border-radius: 5px; padding: 8px 12px; font-size: 13px; }
.extension-fallback-toggle input[type="checkbox"] { flex: 0 0 auto; width: 18px; height: 18px; margin: 0; accent-color: var(--primary, #4fa8e0); }
.extension-fallback-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; border-top: 1px solid var(--border, #303740); padding-top: 12px; margin-top: 12px; }
.extension-fallback [hidden] { display: none !important; }