*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  background: #f9fafb;
  padding: 1rem 1.5rem;
  color: #111;
}

main {
  max-width: 500px;
  margin: 0 auto;
  background: white;
  border-radius: 1rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  padding: 1.5rem 2rem;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
}

section:not(:last-child) {
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid #ddd;
  padding-bottom: 0.3rem;
}

#messageDisplay {
  padding: 1rem;
  background: #eef2ff;
  border-radius: 0.5rem;
  color: #1e40af;
}

.actions {
  display: flex;
  gap: 1rem;
}

button {
  flex: 1;
  padding: 0.75rem 1rem;
  background: #3b82f6;
  color: white;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
}

button:hover {
  background: #2563eb;
}