body{margin:0;padding:0;color:#000;background-color:#fff}#app{width:100%;height:100vh;overflow:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center}#checkboxes{display:grid;grid-template-columns:repeat(4,auto);grid-template-rows:repeat(4,auto);gap:8px 16px;justify-content:center;align-items:center}#checkboxes input[type=checkbox]{width:32px;height:32px;accent-color:#0074d9;cursor:pointer}#button-stack{display:flex;flex-direction:column;gap:8px;margin-top:24px;align-items:center}#button-stack button{width:176px;height:32px;font-size:1rem;cursor:pointer;border-radius:4px;border:1px solid #0074d9;background:#f0f8ff;color:#0074d9;transition:background .2s}#button-stack button:hover{background:#e6f2fa}