body {
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

main {
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

section {
  padding: 2rem;
  height: auto;
  width: 40%;
  max-width: 500px;
  min-width: 320px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex-grow: 1;
  height: 100%;
}

form > div {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

form label {
  color: var(--text-color);
  font-size: 1.25rem;
  font-weight: 500;
}

/* 2K Resolution */
@media (min-width: 2560px) {
  section {
    width: 30%;
    max-width: 600px;
    padding: 3rem;
  }

  form label {
    font-size: 1.5rem;
  }

  .form-header h1 {
    font-size: 2.5rem;
  }

  .email-input > input,
  .password-input > input,
  .username-input > input {
    padding: 0.75rem 1.25rem;
    font-size: 1.25rem;
  }

  .remember-me label,
  .remember-me a {
    font-size: 1.15rem;
  }

  .form-links > a {
    font-size: 1.15rem;
  }

  .email-error,
  .password-error,
  .username-error,
  .terms-error {
    font-size: 1.1rem;
  }
}

/* Large Desktop */
@media (min-width: 1920px) {
  section {
    width: 35%;
    max-width: 550px;
  }

  form label {
    font-size: 1.35rem;
  }

  .form-header h1 {
    font-size: 2.25rem;
  }

  .email-input > input,
  .password-input > input,
  .username-input > input {
    padding: 0.65rem 1.15rem;
    font-size: 1.2rem;
  }
}

/* Tablet */
@media (max-width: 992px) {
  section {
    width: 60%;
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  section {
    width: 90%;
    padding: 1.5rem;
  }

  form label {
    font-size: 1.1rem;
  }

  .form-header h1 {
    font-size: 1.75rem;
  }

  .email-input > input,
  .password-input > input,
  .username-input > input {
    padding: 0.6rem 0.9rem;
    font-size: 1rem;
  }

  .form-footer {
    flex-direction: column;
    gap: 1rem;
  }

  .remember-me {
    flex-wrap: wrap;
  }
}

@media (max-width: 576px) {
  section {
    width: 100%;
    padding: 1rem;
    min-width: auto;
  }

  form label {
    font-size: 1rem;
  }

  .form-header h1 {
    font-size: 1.5rem;
  }

  .email-input > input,
  .password-input > input,
  .username-input > input {
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
  }

  .remember-me label,
  .remember-me a {
    font-size: 0.9rem;
  }

  .form-links > a {
    font-size: 0.9rem;
  }

  .email-error,
  .password-error,
  .username-error,
  .terms-error {
    font-size: 0.9rem;
  }

  .confirm-pass {
    margin-top: 0.75rem;
  }
}

.form-header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.form-header h1 {
  color: var(--text-color);
  font-size: 2rem;
  font-weight: 700;
}

.email-input > input,
.password-input > input,
.username-input > input {
  width: 100%;
  padding: 0.5rem 1rem;
  border: none;
  background-color: var(--accent-color);
  border-radius: 0.75rem;
  color: var(--text-color-secondary);
  outline: none;
  font-size: 1.15rem;
}

.password-input {
  width: 100%;
  position: relative;
}

.password-input button {
  width: 1.5rem;
  height: 1.5rem;
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  filter: invert(1);
}

.password-input img {
  width: 100%;
  height: 100%;
}

.password-input img.hide {
  display: none;
}

.remember-me {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.remember-me a {
  color: var(--text-color);
  font-size: 1rem;
  font-weight: 700;
}

.custom-checkbox {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.custom-checkbox + label {
  position: relative;
  padding-left: 2rem;
  cursor: pointer;
  user-select: none;
}

.custom-checkbox + label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--text-color-secondary);
  border-radius: 0.25rem;
  background-color: var(--background-color);
  transition: background-color 0.2s ease, border-color 0.3s ease;
}

.custom-checkbox:checked + label::before {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.custom-checkbox:checked + label::after {
  position: absolute;
  left: 0.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-color);
  font-size: 0.75rem;
  font-weight: bold;
}

.remember-me label {
  color: var(--text-color);
  font-size: 1rem;
  font-weight: 400;
}

.form-links {
  display: flex;
  flex-direction: column;
}

.form-links > a {
  color: var(--text-color-secondary);
  font-size: 1rem;
  font-weight: 400;
  text-align: right;
}

.form-footer {
  margin-top: 1rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: start;
}

form > button {
  margin-top: 1rem;
}

.email-error,
.password-error,
.username-error,
.terms-error {
  color: var(--error-color);
  font-size: 1rem;
  font-weight: 400;
  min-height: 2em;
}

.confirm-pass {
  margin-top: 1rem;
}