* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  height: 100vh;
  overflow: hidden;
  background: #000000;
}

.bg {
  position: fixed;
  inset: 0;
  background: url("https://www.transparenttextures.com/patterns/cubes.png") repeat;
  background-size: 400px;
  animation: moveBg 45s linear infinite;
  opacity: 0.3;
}




@keyframes moveBg {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 1000px 1000px;
  }
}

/* การ์ด QR */
.card {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  width: 340px;
  border-radius: 28px;
  padding: 90px 20px 30px;
  text-align: center;
  z-index: 10;
}

/* รูปวงกลม */
.avatar {
  position: absolute;
  top: -55px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 110px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid #fff;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* QR */
.qr {
  width: 230px;
  margin: 0 auto;
}

/* ชื่อ */
.username {
  margin-top: 18px;
  font-size: 20px;
  font-weight: bold;
  color: #4b7cff;
}