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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 30px;
  color: #333;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.button-section {
  margin-top: 1.5rem;
}

button {
  padding: 8px 20px;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid #adb5bd;
  border-radius: 4px;
  background: #fff;
  transition: background 0.15s;
}

button:hover {
  background: #f1f3f5;
}

.result-message {
  display: none;
  color: #28a745;
  margin-top: 8px;
  font-weight: 500;
  font-size: 14px;
}