{
  margin: 0;
  padding: 0;
  background: url(pic1.jpg);
  box-sizing: border-box;
  outline: none;
  font-family: "Inconsolata", monospace;
}

html {
  font-size: 62.5%;
}

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

.heading {
  position: absolute;
  top: 5rem;
  font-size: 7rem;
  font-weight: 300;
  color: #f03535;
  letter-spacing: 1rem;
  text-shadow: 0.2rem 0.2rem 0.5rem #aaa;
}

.heading span {
  position: relative;
}

.heading-span-1 {
  z-index: 10;
}

.heading-span-2::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #fff;
  right: -100%;
  transition: right 0.6s;
}

.change .heading-span-2::after {
  right: 100%;
}

.buttons {
  position: absolute;
  top: 5rem;
  left: 5rem;
  display: flex;
  flex-direction: column;
}

.buttons button {
  width: 10rem;
  height: 4rem;
  font-size: 2rem;
  color: #f03535;
  border: none;
  border-radius: 5rem;
  letter-spacing: 0.1rem;
  box-shadow: 0.3rem 0.3rem 0.8rem #eee;
  margin: 1rem 0;
  cursor: pointer;
  transition: background-color 0.3s;
}

.signin-btn {
  background-color: #e7e7e7;
}

.change .signin-btn {
  background-color: #fff;
}

.signup-btn {
  background-color: #fff;
}

.change .signup-btn {
  background-color: #e7e7e7;
}

.form-bg {
  position: absolute;
  width: 65rem;
  height: 65rem;
  box-shadow: 1.5rem 1.5rem 1.5rem #ddd;
  transform: rotate(45deg);
}

.form {
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.form-input-wrapper {
  margin: 1.5rem 0;
  box-shadow: 0.5rem 0.5rem 0.5rem #eee;
  border-radius: 5rem;
  position: relative;
}

.form-input-wrapper:nth-child(1),
.form-input-wrapper:nth-child(4) {
  visibility: hidden;
  opacity: 0;
  transition: all 0.3s;
}

.change .form-input-wrapper:nth-child(1),
.change .form-input-wrapper:nth-child(4) {
  visibility: visible;
  opacity: 1;
  transition: all 0.3s 0.3s;
}

.form input {
  width: 50rem;
  height: 5rem;
  background-color: #fff;
  font-size: 1.7rem;
  padding: 0 2rem;
  letter-spacing: 0.2rem;
  border: none;
  border-radius: 5rem;
}

.form-input {
  box-shadow: 0.3rem 0.3rem 0.5rem #eee inset;
  color: #888;
}

.form-input:focus {
  box-shadow: 0.5rem 0.5rem 1rem #eee inset;
}

.message {
  position: absolute;
  left: 2rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.1rem;
  text-transform: uppercase;
  margin-top: 1rem;
  color: #f55e5e;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s;
}

.error .message {
  visibility: visible;
  opacity: 1;
}

.success .form-input {
  border: 0.1rem solid #46e75b;
}

.form-btn {
  box-shadow: 0.5rem 0.5rem 1rem #ddd;
  color: #f03535;
  margin: 2rem 0;
  letter-spacing: 0.2rem;
  font-weight: bold;
  cursor: pointer;
  position: relative;
  top: -6rem;
  transition: top 0.3s 0.3s, box-shadow 0.3s;
}

.change .form-btn {
  top: 1rem;
  transition: top 0.3s, box-shadow 0.3s;
}

.form-btn:hover {
  box-shadow: 0.5rem 0.5rem 2rem #ddd;
}

@media (max-width: 1400px) {
  .form-bg {
    transform: rotate(0);
    height: 55rem;
  }
}

@media (max-width: 1000px) {
  .heading {
    font-size: 5rem;
  }

  .form-bg {
    width: 55rem;
    height: 50rem;
    margin-bottom: 10rem;
  }

  .form input {
    width: 40rem;
  }
}

@media (max-width: 700px) {
  html {
    font-size: 55%;
  }

  .heading {
    font-size: 4rem;
    top: 2rem;
  }

  .buttons {
    left: 2rem;
    top: 2rem;
  }

  .buttons button {
    width: 7rem;
    height: 3rem;
    font-size: 1.7rem;
  }

  .form-bg {
    height: 45rem;
    width: 45rem;
  }

  .form input {
    width: 35rem;
  }
}

@media (max-width: 450px) {
  html {
    font-size: 4