html,body{text-align:center;background-color:#000;height:100%;margin:0;font-family:Arial,Helvetica,sans-serif}body{justify-content:center;align-items:center;font-family:system-ui,sans-serif;display:flex}.tableau{flex-direction:column;gap:10px;display:flex}.row{gap:10px;display:flex}.cell{color:#666;-webkit-user-select:none;user-select:none;cursor:pointer;background:#222;border:2px solid #444;justify-content:center;align-items:center;width:100px;height:80px;font-size:2rem;font-weight:700;display:flex}.cell.alarm{color:#fff;background:red}