*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background-color:#f5f5f5;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;color:#333}.card{background-color:#fff;padding:2rem;border-radius:12px;box-shadow:0 10px 25px #0000001a;max-width:360px;width:100%;text-align:center}h1{margin-bottom:1.5rem;font-size:1.6rem}button{width:100%;padding:.9rem;margin-bottom:.8rem;font-size:1rem;font-weight:700;border:none;border-radius:8px;cursor:pointer;transition:background-color .2s ease,transform .1s ease,opacity .2s ease}button:active{transform:scale(.98)}button:disabled{cursor:not-allowed;opacity:.6;transform:none}#open-btn{background-color:#28a745;color:#fff}#open-btn:hover:not(:disabled){background-color:#218838}#close-btn{background-color:#dc3545;color:#fff}#close-btn:hover:not(:disabled){background-color:#c82333}.status{margin-top:1.5rem;text-align:left;font-size:.95rem;line-height:1.4rem}.status span{display:block;margin-top:.4rem;font-size:1.1rem;font-weight:700;color:#007bff;word-break:break-word}.status .offline{color:#dc3545}