.middle-box {
  width: 300px;
  padding: 50px;
  margin: 0 auto;
  border: 1px solid #ccc;
  border-radius: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  text-align: center;
}
.logo {
  width: 100%;
  height: 150px;
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
  margin: 10px 0;
}
.logo a {
  display: flex;
}
.middle-box h1 {
  font-size: 20px;
  margin-bottom: 10px;
}
.middle-box p {
  font-size: 14px;
  margin-bottom: 20px;
}
.middle-box input {
  width: calc(100% - 22px);
  padding: 10px;
  border-radius: 10px;
}
.submit-button {
  width: 100%!important;
  padding: 10px;
  background: #007BFF;
  color: #fff;
  border: none;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 16px;
}
.submit-button:disabled {
  background: #73b7ff; 
  cursor: default;
}
.subtitle-button {
  color: #007BFF;
  text-align: center;
  border: none;
  background: none;
  transition: 0.2s;
}
.subtitle-button:disabled {
  color: #cccccc; 
  cursor: default;
}
form {
  margin: 0!important;
}
div.message {
  width: inherit!important;
}