body {
  font-family: Arial, sans-serif;
  background: #f2f9ff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px 40px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  max-width: 450px;
  width: 100%;
  text-align: center;
}

h1 {
  margin-bottom: 0;
  font-size: 2.5rem;
}

.tagline {
  color: #555;
  margin-top: 5px;
  margin-bottom: 25px;
  font-style: italic;
}

input[type="text"] {
  width: 100%;
  padding: 12px 15px;
  font-size: 1rem;
  border: 2px solid #0077cc;
  border-radius: 8px;
  outline: none;
  box-sizing: border-box;
}

input[type="text"]:focus {
  border-color: #005fa3;
}

button {
  margin-top: 15px;
  background: #0077cc;
  color: white;
  padding: 12px 25px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #005fa3;
}

#spinner {
  margin-top: 20px;
  font-size: 1.3rem;
  color: #0077cc;
}

.hidden {
  display: none;
}

#responseBox {
  margin-top: 25px;
  text-align: left;
  font-size: 1.1rem;
  color: #222;
  max-height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
}