form div:nth-child(5) {
  margin: 0 auto;
}

.container-contact {
  margin-top: 90px;
  max-width: 500px;
  box-shadow: 0 0 7px var(--menu-link);
  padding: 30px 12px;
  border-radius: 5px;
}

.both-div {
  display: flex;
  justify-content: space-between;
}

form textarea {
  height: 150px;
  width: 100%;
  font-size: 0.8rem;
  padding: 10px 5px;
  border: 1px solid var(--menu-link);
  border-radius: 5px;
  resize: none;
}

form label {
    margin-top: 5px;
}

#contact_Envoyer {
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 30px;
}

.messagePHP {
  width: 100%;
  margin-top: 15px;
  margin-bottom: 25px;
  text-align: center;
}

@media screen and (max-height: 559px) {
    #content-container {
        height: auto;
        margin-top: 10px;
        margin-bottom: 10px;
    }
}