body {
  font-family: system-ui, sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 2rem;
  color: #222;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

h1, h2 {
  text-align: center;
}

form {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin: 0.5rem 0;
}

textarea {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
}

button {
  background: #333;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  display: block;
  margin: 1rem auto;
}

button:hover {
  background: #000;
}

#response {
  margin-top: 2rem;
  padding: 1rem;
  background: #e0f7fa;
  border-left: 4px solid #00acc1;
  border-radius: 0.5rem;
}

@media (max-width: 600px) {
  body {
    padding: 1rem;
  }

  .container {
    padding: 1rem;
  }

  button {
    width: 100%;
  }
}