.contact {
  /* Uses exact 150px whitespace tracks on either side of the form. */
  display: grid;
  grid-template-columns: max-content 150px minmax(0, 1fr) 150px var(--space-8);
  align-items: start;
  column-gap: 0;
  row-gap: var(--space-4);
  padding: var(--space-8) var(--space-6);
}

.contact h1,
.contact h2 {
  margin: 0;
  color: var(--color-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.contact h1 {
  font-size: var(--font-size-lg);
}

.contact h2 {
  font-size: var(--font-size-md);
}

.contact__details > p {
  margin: var(--space-2) 0 0;
  font-size: var(--font-size-sm);
}

.contact__details > h2 {
  margin-top: var(--space-6);
}

.contact-list {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-5) 0 0;
}

.contact-list div {
  display: grid;
  gap: var(--space-1);
}

.contact-list dt {
  color: var(--color-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.contact-list dd {
  margin: 0;
  color: var(--color-text);
  font-size: var(--font-size-xs);
}

.contact-list a {
  font-size: var(--font-size-xs);
}

.contact-form,
.contact-response-time {
  background: var(--card-bg);
  border: var(--border-width) var(--border-style) var(--card-border);
  border-radius: var(--radius-none);
}

.contact-form {
  padding: var(--space-4);
}

.contact__form-column {
  /* Places the form after the first 150px whitespace track. */
  grid-column: 3;
}

.contact-social {
  /* Right-aligns the icon rail after the second 150px whitespace track. */
  display: grid;
  grid-column: 5;
  gap: var(--space-2);
  justify-self: end;
}

.contact-social a {
  display: grid;
  place-items: center;
  justify-self: center;
  width: var(--space-8);
  aspect-ratio: 1;
  background: var(--color-surface-alt);
  color: var(--color-link);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
}

.contact-social a:hover {
  background: var(--color-primary);
  color: var(--button-text);
}

.contact-form h2 {
  margin-bottom: var(--space-2);
  color: var(--color-success);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

/* Keeps the reply expectation subordinate to the form's success-green action heading. */
.contact-form__response-time {
  margin: 0 0 var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.contact-form__field {
  display: grid;
  gap: var(--space-1);
  margin-top: var(--space-3);
}

.contact-form__field:first-of-type {
  margin-top: 0;
}

.contact-form label {
  color: var(--color-text);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--input-bg);
  border: var(--border-width) var(--border-style) var(--input-border);
  border-radius: var(--radius-none);
  color: var(--color-text);
  padding: var(--space-2);
  font: inherit;
  font-size: var(--font-size-xs);
}

.contact-form textarea {
  /* Allows message expansion without forcing a horizontal resize. */
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: var(--border-width) var(--border-style) var(--input-focus);
  border-color: var(--input-focus);
}

.contact-form__errors,
.contact-form__errors ul {
  margin: 0;
  padding: 0;
  color: var(--color-error);
  font-size: var(--font-size-xs);
  list-style: none;
}

.contact-form .button {
  width: 100%;
  margin-top: var(--space-4);
  cursor: pointer;
}

.contact-faq {
  padding: var(--space-3);
}

.contact-faq h2 {
  margin-bottom: var(--space-3);
}

.contact-faq details {
  border-top: var(--border-width) var(--border-style) var(--color-border);
  padding: var(--space-3) 0;
}

.contact-faq details:last-child {
  padding-bottom: 0;
}

.contact-faq summary {
  color: var(--color-heading);
  cursor: pointer;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.contact-faq p {
  margin: var(--space-2) 0 0;
  color: var(--color-text);
  font-size: var(--font-size-xs);
}

/* Styles the native success dialog, which is centered and modal when opened. */
.contact-success-dialog {
  width: calc(100% - (var(--space-6) * 2));
  max-width: var(--content-max-width);
  background: var(--card-bg);
  border: var(--border-width-strong) var(--border-style) var(--color-success);
  border-radius: var(--radius-none);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
}

.contact-success-dialog__content {
  display: grid;
  gap: var(--space-4);
  text-align: center;
}

.contact-success-dialog h2,
.contact-success-dialog p {
  margin: 0;
}

.contact-success-dialog h2 {
  color: var(--color-heading);
  font-size: var(--font-size-lg);
}

.contact-success-dialog p {
  color: var(--color-text);
  font-size: var(--font-size-base);
}

.contact-success-dialog .button {
  justify-self: center;
}

@media (max-width: 800px) {
  /* Preserves a two-thirds form column until the mobile stack takes over. */
  .contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    column-gap: var(--space-4);
  }

  .contact__form-column {
    /* Returns the form to the second medium-screen grid track. */
    grid-column: 2;
  }

  .contact-social {
    /* Moves the social links below the two-column contact layout. */
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-row: 2;
  }
}

@media (max-width: 640px) {
  /* Stacks all page regions before the two-column layout becomes cramped. */
  .contact {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .contact__form-column {
    /* Returns the form to the only available grid track on mobile. */
    grid-column: auto;
  }

  .contact-social {
    /* Lets the social links follow the form in the one-column layout. */
    grid-row: auto;
  }

  .contact-response-time {
    margin-top: var(--space-6);
  }
}