body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #0f0f0f;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  padding: 20px;
  border-radius: 20px;
  background: #1a1a1a;
  box-shadow: 0 0 30px #00f2ff66;
  width: 90%;
  max-width: 400px;
}

h1 {
  color: #0ff;
  margin-bottom: 20px;
}

input[type="file"] {
  background: #222;
  color: #fff;
  padding: 10px;
  border-radius: 10px;
  margin-bottom: 20px;
  border: none;
  width: 100%;
}

button, a#downloadLink {
  background: linear-gradient(45deg, #00f2ff, #00ffa2, #ffc400, #ff0055);
  background-size: 300% 300%;
  color: #000;
  padding: 12px 20px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-weight: bold;
  animation: glow 4s ease infinite;
  display: inline-block;
  margin-top: 15px;
  text-decoration: none;
}

@keyframes glow {
  0% { box-shadow: 0 0 10px #00f2ff; background-position: 0% 50%; }
  50% { box-shadow: 0 0 20px #00ffa2; background-position: 100% 50%; }
  100% { box-shadow: 0 0 10px #ff0055; background-position: 0% 50%; }
}

#status {
  margin-top: 20px;
  color: #0f0;
}