body {
  font-family: system-ui, Arial;
  background: #050a18;
  color: #e6eef8;
  display: flex; justify-content: center; align-items: center;
  height: 100vh;
  margin: 0;
}
.device {
  width: 360px; background: #0b142a;
  border-radius: 18px; padding: 20px;
  box-shadow: 0 0 25px rgba(0,0,0,0.5);
  text-align: center;
}
.btn {
  display:inline-block; padding:12px 20px;
  background:linear-gradient(90deg,#4ef3c0,#5b83ff);
  color:#012; border:0; border-radius:12px;
  font-weight:700; cursor:pointer;
}
.status {
  margin-top:15px;
  color:#a4b2d1;
}