html, body {
  height: 100%;
}

.page {
  height: 100%;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.logo {
  width: 90%;
}

.form {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.input {
  box-sizing: border-box;
  margin: 10px 0;
  width: 100%;
  padding: 10px;
  font-size: 14px;
  border-radius: 5px;
  border: 1px solid #818181;
}

.button {
  box-sizing: border-box;
  font-size: 14px;
  border-radius: 5px;
  width: 100%;
  padding: 10px;
  border: 1px solid #818181;
}

.text {
  text-align: center;
  font-size: 14px;
  margin: 20px;
  color: red;
  visibility: hidden;
}

.text_is-show {
  visibility: visible;
}

@media screen and (min-width: 350px) {
  .logo {
    width: 250px;
  }

  .button {
    width: 300px;
  }

  .input {
    width: 300px;
  }

  .text {
    width: 300px;
  }
}