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

body {
  margin: 50px;
  height: 100vh;
  background: radial-gradient(circle at top, #0f172a, #020617);
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
}

.container {
  text-align: center;
}

h1 {
  margin-bottom: 50px;
}

.btn {
  padding: 40px 50px;
  background: linear-gradient(90deg, #c7d2fe, #ddd6fe);
  color: #111;
  border-radius: 14px;
  cursor: pointer;
  font-weight: bold;
  box-shadow: 0 0 25px rgba(200,200,255,0.4);
}

.hidden {
  display: none;
}

.success {
  color: #22c55e;
  font-weight: bold;
}

input[type="text"] {
  padding: 30px;
  width: 260px;
  border-radius: 15px;
  border: none;
  margin: 15px 0;
}

button {
  padding: 30px 50px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: bold;
}

.bar {
  width: 260px;
  height: 10px;
  background: #1e293b;
  border-radius: 6px;
  margin: 10px auto;
  overflow: hidden;
}

.fill {
  height: 100%;
  width: 0%;
  background: #22c55e;
  transition: width 0.9s;
}

#downloadBtn {
  display: inline-block;
  margin-top: 15px;
  padding: 25px 40px;
  background: #22c55e;
  color: #000;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
}

.tick {
  margin-top: 30px;
  color: #22c55e;
  font-size: 30px;
}