body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  padding: 10px;
  background: #fff;
  color: #000;
  font-family: 'Roboto', sans-serif;
  box-sizing: border-box;
}

#auth {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 400px;
  background-color: #fff;
  border: 2px solid #000;
  border-radius: 10px;
  padding: 20px;
  box-sizing: border-box;
}

.auth-label {
  font-size: 2rem;
  margin: 10px;
  color: #000;
  text-align: center;
}

.auth-input {
  width: 100%;
  padding: 12px;
  margin-bottom: 15px;
  font-size: 1.2rem;
  border: 2px solid #000;
  border-radius: 5px;
  box-sizing: border-box;
}

.auth-input::placeholder {
  font-size: 1rem;
  color: #000;
}

.auth-enter {
  width: 100%;
  padding: 12px;
  font-size: 1.4rem;
  border: 2px solid #000;
  border-radius: 5px;
  background-color: transparent;
  color: #000;
  cursor: pointer;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.auth-enter:hover {
  background-color: #000;
  color: #fff;
}

#errdiv {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  justify-content: center;
  align-items: center;
}

#err {
  width: 90%;
  max-width: 300px;
  padding: 20px;
  background: #fff;
  border: 2px solid #000;
  border-radius: 6px;
  box-sizing: border-box;
  text-align: center;
}

@media (max-width: 600px) {
  .auth-label {
    font-size: 1.5rem;
  }

  .auth-input,
  .auth-enter {
    font-size: 1rem;
    padding: 10px;
  }

  #err {
    font-size: 1rem;
  }
}