:root {
  --clr-blue: hsl(223, 87%, 63%);
  --clr-pale-blue: hsl(223, 100%, 88%);
  --clr-light-red: hsl(354, 100%, 66%);
  --clr-gray: hsl(0, 0%, 59%);
  --clr-very-dark-blue: hsl(209, 33%, 12%);

  --ff-libre-franklin: 'Libre Franklin', sans-serif;

  --fw-300: 300;
  --fw-600: 600;
  --fw-700: 700;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

img,
picture,
video,
canvas,
svg {
  max-width: 100%;
  display: block;
}

input,
button,
optgroup,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

body {
  min-height: 100vh;
  font-family: var(--ff-libre-franklin);
  font-size: 1.25rem;
  font-weight: var(--fw-300);
  line-height: 1.5;
  padding: 1.25rem;
}

.header {
  margin-top: 9.375rem;
  display: flex;
  justify-content: center;
}

.header img {
  width: 6.875rem;
  height: auto;
}

.main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.text-content {
  text-align: center;
  margin-top: 3.75rem;
  margin-bottom: 3.75rem;
}

.text-content h1 {
  font-size: 2.625rem;
  font-weight: var(--fw-300);
  color: var(--clr-gray);
  margin-bottom: 1.25rem;
}

.text-content em {
  font-style: normal;
  font-weight: var(--fw-700);
  color: var(--clr-very-dark-blue);
}

.text-content p {
  font-size: 1.5rem;
  color: var(--clr-very-dark-blue);
}

.form {
  max-width: 34.375rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  margin-bottom: 7.5rem;
}

.email-container {
  text-align: center;
}

.form input {
  padding: 1.5625rem 3.75rem;
  border: 2px solid var(--clr-pale-blue);
  border-radius: 3.125rem;
  width: 100%;
  outline: none;
}

.form input.error-border {
  border-color: var(--clr-light-red);
}

.form input::placeholder {
  color: var(--clr-pale-blue);
  opacity: 1;
  font-size: 1.5rem;
}

.error-message {
  font-size: 1.25rem;
  color: var(--clr-light-red);
  text-align: center;
  font-style: italic;
}

.form button {
  font-size: 1.5rem;
  font-weight: var(--fw-600);
  border: none;
  border-radius: 3.125rem;
  background-color: var(--clr-blue);
  color: white;
  padding: 1.5625rem;
  margin-top: 1.25rem;
  cursor: pointer;
  transition: 0.2s;
  box-shadow: 0 10px 14px 0 hsla(223, 87%, 63%, 20%);
}

.form button:hover {
  opacity: 0.8;
}

.main img {
  width: 38.75rem;
  height: auto;
}

.footer {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4.375rem;
  margin-top: 15.625rem;
}

.footer .social-links {
  display: flex;
  gap: 1.25rem;
  list-style-type: none;
}

.social-links a {
  font-size: 1.625rem;
  color: var(--clr-blue);
  border: 1px solid var(--clr-pale-blue);
  padding: 0.75rem;
  border-radius: 50%;
  transition: 0.2s;
}

.social-links a:hover {
  color: white;
  background-color: var(--clr-blue);
  border: 1px solid var(--clr-blue);
}

.footer p {
  color: var(--clr-gray);
}

@media screen and (max-width: 26.5625rem) {
  body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .header img {
    width: 3.75rem;
  }

  .header {
    margin-top: 3.75rem;
  }

  .text-content {
    margin-top: 1.875rem;
    margin-bottom: 2.5rem;
  }

  .text-content h1 {
    font-size: 1.25rem;
    margin-bottom: 0.625rem;
  }

  .text-content p {
    font-size: 0.875rem;
  }

  .form {
    margin-bottom: 5rem;
    max-width: 18.75rem;
  }

  .form .email-container {
    display: flex;
    flex-direction: column;
  }

  .form input {
    padding: 0.625rem 1.5625rem;
    border: 1px solid var(--clr-pale-blue);
  }

  .form input::placeholder {
    font-size: 0.75rem;
  }

  .form button {
    font-size: 0.75rem;
    padding: 0.875rem 1.5625rem;
  }

  .form .error-message {
    font-size: 0.75rem;
    text-align: center;
    margin-left: 0;
  }

  .social-links a {
    font-size: 0.875rem;
    padding: 0.5rem;
  }

  .footer {
    gap: 1.5625rem;
    margin-top: 3.125rem;
    margin-bottom: 2.5rem;
  }

  .footer p {
    font-size: 0.75rem;
  }
}

@media screen and (min-width: 75rem) {
  .header img {
    width: 5.625rem;
  }

  .header {
    margin-top: 5.625rem;
  }

  .text-content {
    margin-top: 1.875rem;
    margin-bottom: 2.5rem;
  }

  .text-content h1 {
    font-size: 3rem;
    margin-bottom: 0.625rem;
  }

  .text-content p {
    font-size: 1.25rem;
  }

  .form {
    max-width: 40rem;
    flex-direction: row;
    gap: 0.625rem;
    margin-bottom: 5rem;
  }

  .form .email-container {
    display: flex;
    flex-direction: column;
  }

  .form input {
    padding: 0.9375rem 1.5625rem;
    border: 1px solid var(--clr-pale-blue);
    width: 26.25rem;
  }

  .form input::placeholder {
    font-size: 1rem;
  }

  .form button {
    font-size: 1rem;
    padding: 1.125rem 1.5625rem;
    margin-top: 0;
    align-self: flex-start;
    flex: 1;
  }

  .form .error-message {
    font-size: 0.75rem;
    text-align: left;
    margin-left: 1.5625rem;
  }

  .main img {
    width: 640px;
    height: auto;
  }

  .social-links a {
    font-size: 0.875rem;
    padding: 0.5rem;
  }

  .footer {
    gap: 1.5625rem;
    margin-top: 3.125rem;
    margin-bottom: 2.5rem;
  }

  .footer p {
    font-size: 0.75rem;
  }
}