/* Meridian · Footer
   Structure: .dm-footer > __top (brand column + link columns) + __bottom (copyright +
   social links), separated by a 1px outline-variant rule. Static component — no JS.
   Columns collapse to a single stack below 768px. */

.dm-footer {
  background: var(--dm-color-surface-variant);
  color: var(--dm-color-on-surface-variant);
  border-top: 1px solid var(--dm-color-outline-variant);
}

/* ---- Top area: brand + link columns -------------------------------------- */

.dm-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--dm-space-xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--dm-space-2xl) var(--dm-space-lg);
}

.dm-footer__brand {
  display: block;
  font: var(--dm-type-h3);
  letter-spacing: var(--dm-tracking-heading);
  color: var(--dm-color-on-surface);
  text-decoration: none;
  width: fit-content;
}

.dm-footer__brand:hover {
  color: var(--dm-color-on-surface);
}

.dm-footer__tagline {
  margin-top: var(--dm-space-sm);
  max-width: 36ch;
  font: var(--dm-type-body-sm);
  color: var(--dm-color-on-surface-variant);
}

.dm-footer__heading {
  font: var(--dm-type-label-sm);
  letter-spacing: var(--dm-tracking-label-sm);
  text-transform: uppercase;
  color: var(--dm-color-on-surface);
  margin-bottom: var(--dm-space-md);
}

.dm-footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--dm-space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.dm-footer__link {
  font: var(--dm-type-body-sm);
  color: var(--dm-color-on-surface-variant);
  text-decoration: none;
  width: fit-content;
  transition: color var(--dm-duration-fast) var(--dm-ease-standard);
}

.dm-footer__link:hover {
  color: var(--dm-color-primary);
  text-decoration: underline;
}

/* ---- Bottom bar: copyright + social ---------------------------------------- */

.dm-footer__bottom {
  border-top: 1px solid var(--dm-color-outline-variant);
}

.dm-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--dm-space-md);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--dm-space-lg);
}

.dm-footer__copyright {
  font: var(--dm-type-body-sm);
  color: var(--dm-color-on-surface-variant);
}

.dm-footer__social {
  display: flex;
  gap: var(--dm-space-sm);
}

/* Circular icon targets; glyphs are inline SVGs inheriting currentColor */
.dm-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--dm-color-on-surface-variant);
  border: 1px solid var(--dm-color-outline);
  border-radius: var(--dm-rounded-full);
  transition: color var(--dm-duration-fast) var(--dm-ease-standard),
    border-color var(--dm-duration-fast) var(--dm-ease-standard),
    transform var(--dm-duration-fast) var(--dm-ease-standard);
}

.dm-footer__social-link:hover {
  color: var(--dm-color-primary);
  border-color: var(--dm-color-primary);
  transform: translateY(-2px);
}

.dm-footer__social-link svg {
  width: 16px;
  height: 16px;
}

/* ---- Responsive -------------------------------------------------------------- */

@media (max-width: 767px) {
  .dm-footer__top {
    grid-template-columns: 1fr;
    gap: var(--dm-space-xl);
    padding: var(--dm-space-xl) var(--dm-space-md);
  }

  .dm-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--dm-space-lg) var(--dm-space-md);
  }
}