.signin-container {
  width: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  /* 개체의 너비, 높이에 대한 비율 */
  transform: translate(-50%, -50%);
  text-align: center;
}

.signin-container h2 {
  font-size: 3.5rem;
}

.signin-form {
  width: 90%;
  max-width: 50rem;
  margin: 2rem auto 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.signin-form input {
  width: 100%;
  font-size: 2rem;
  line-height: 2;
  border: 3px solid #606060;
  margin-bottom: 1rem;
  padding-left: 1rem;
}

#signin,
input#signup {
  padding-left: 0;
  background: #4aa8d8;
  border: none;
  color: white;
  cursor: pointer;
  font-family: inherit;
}

#signin:hover,
input#signup:hover {
  color: black;
}

.signup-container {
  width: 100%;
  text-align: center;
}

#signup {
  display: block;
  color: black;
  font-size: 2rem;
  text-decoration: none;
}

a {
  text-decoration: none;
  color: inherit;
}