.button {
  background: #2c7a7b;
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
}
.button:hover { background: #1f5f61; }
.button:focus-visible { outline: 3px solid #014d4e; outline-offset: 2px; }
.button:disabled { background: #a0aec0; color: #f0f0f0; cursor: not-allowed; }