/* Import font Orbitron */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500&display=swap');

/* Body & background */
body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

/* Container utama */
.container {
  background: #1a1a2e;
  padding: 30px;
  border-radius: 20px;
  width: 90%;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 0 25px #00ffff, 0 0 50px #ff00ff;
  border: 1px solid #00ffff;
}

/* Tajuk */
h2 {
  color: #00ffff;
  text-shadow: 0 0 10px #00ffff, 0 0 20px #ff00ff, 0 0 30px #00ffff;
  margin-bottom: 15px;
}

/* Input & select */
select, input {
  width: 100%;
  padding: 12px;
  margin-top: 12px;
  border-radius: 10px;
  border: none;
  font-size: 16px;
  background: #0f0c29;
  color: #fff;
  box-shadow: 0 0 8px #00ffff inset;
  transition: 0.3s;
}

select:focus, input:focus {
  outline: none;
  box-shadow: 0 0 12px #ff00ff inset;
}

/* Highlight Best Seller */
option[value="720"], option[value="1800"] {
  font-weight: bold;
  color: #ff0;
  text-shadow: 0 0 8px #ff0, 0 0 15px #ff00ff;
}

/* Button */
button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg,#25D366,#128C7E);
  font-size: 16px;
  font-weight: bold;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 0 10px #25D366;
  transition: 0.3s;
  position: relative;
  overflow: visible;
}

/* Button neon glow effect */
button::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, #ff00ff, #00ffff, #ff00ff, #00ffff);
  background-size: 400% 400%;
  animation: glow 5s linear infinite;
  filter: blur(15px);
  z-index: -1;
}

@keyframes glow {
  0% {background-position: 0% 50%;}
  50% {background-position: 100% 50%;}
  100% {background-position: 0% 50%;}
}

button:hover {
  transform: scale(1.05);
}

/* Harga display */
#harga {
  font-size: 22px;
  font-weight: bold;
  color: #ff00ff;
  text-shadow: 0 0 10px #ff00ff, 0 0 20px #00ffff;
  margin-top: 10px;
}

/* Media Query Mobile Ready */
@media(max-width:450px){
  .container {
    padding: 20px;
    box-shadow: 0 0 25px #00ffff, 0 0 50px #ff00ff;
  }

  h2 { font-size: 22px; }
  #harga { font-size: 20px; }
  select, input { font-size: 14px; padding: 10px; }
  button { font-size: 15px; padding: 12px; }
}