.login-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  z-index: 1000;
}

.login-screen input {
  margin: 0.5em;
  padding: 0.5em;
}

.login-screen button {
  margin: 0.5em;
  padding: 0.5em 1em;
}

#google-login-btn {
  background: #4285f4;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  padding: 0.75em 1.5em;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: background 0.3s, transform 0.1s;
}

#google-login-btn:hover {
  background: #3367d6;
}

#google-login-btn:active {
  transform: scale(0.98);
}