html, body {
  height: 100%;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 260px;
}

input {
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #333;
  background: #1c1c1c;
  color: #fff;
}

button {
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 8px;
  border: none;
  background: #fff;
  color: #111;
  cursor: pointer;
}

button:hover {
  background: #eee;
}

#error {
  color: #ff6b6b;
  font-size: 14px;
  min-height: 18px;
  text-align: center;
}