/* style.css */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: url('background.png') no-repeat center center fixed;
  background-size: cover;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  text-align: center;
}
.container {
  width: 90%;
  max-width: 500px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 8px;
}
button, input[type="tel"] {
  padding: 10px 20px;
  margin: 10px 0;
  border: none;
  border-radius: 4px;
  width: 100%;
  box-sizing: border-box;
}
button {
  background: #ff6600;
  color: #fff;
  cursor: pointer;
}
button:hover {
  background: #e65c00;
}
.hidden {
  display: none;
}