/* -------------------------------------------------------------------
   Multi-column footer (logo / link columns / social), numpy.org style.
   Shares the SAME background as Material's `.md-footer-meta` (copyright)
   bar so the two regions read as a single footer block.
   `--md-footer-bg-color--dark` is used by `.md-footer-meta` in both the
   default (light) and slate (dark) schemes, so no per-scheme overrides.
   Selectors are scoped under `.md-footer-columns` to out-specificity
   Material's `.md-typeset ul` / `.md-typeset a` base rules.
   ------------------------------------------------------------------- */

.md-footer-columns {
  background-color: var(--md-footer-bg-color--dark);
  color: var(--md-footer-fg-color);
}

.md-footer-columns__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
  padding: 1.6rem 0.8rem;
  text-align: center;
}

/* Brand / logo */
.md-footer-columns__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.md-footer-columns__brand img {
  display: block;
  width: auto;
  max-width: 10rem;
  height: auto;
}

/* Copyright + tagline, stacked under the logo in the brand column */
.md-footer-columns__brand .md-copyright {
  width: auto;
  max-width: 18rem;
  margin: 0;
  text-align: center;
}

/* Link columns */
.md-footer-columns__nav {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  width: 100%;
}

.md-footer-columns .md-footer-columns__group {
  flex: 1 1 auto;
  min-width: 9rem;
}

.md-footer-columns .md-footer-columns__title {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05rem;
  text-transform: uppercase;
  color: var(--md-footer-fg-color--light);
}

.md-footer-columns .md-footer-columns__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.md-footer-columns .md-footer-columns__list li {
  margin: 0.4rem 0;
}

.md-footer-columns .md-footer-columns__list a {
  color: var(--md-footer-fg-color--light);
  text-decoration: none;
  transition: color 125ms, opacity 125ms;
}

.md-footer-columns .md-footer-columns__list a:is(:focus, :hover) {
  color: var(--md-footer-fg-color);
  text-decoration: underline;
}

/* Social shortcuts */
.md-footer-columns__social {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.md-footer-columns .md-footer-columns__social .md-social {
  padding: 0;
  margin: 0;
}

/* Bigger social logos */
.md-footer-columns .md-footer-columns__social .md-social__link {
  width: 2.2rem;
  height: 2.2rem;
}

.md-footer-columns .md-footer-columns__social .md-social__link svg {
  width: 1.8rem;
  height: 1.8rem;
}


/* Responsive, aligned with Material's own breakpoints (45em / 76.25em) */
@media screen and (min-width: 45em) {
  .md-footer-columns__inner {
    text-align: left;
  }
  .md-footer-columns__nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
    gap: 1.6rem 2.4rem;
  }
}

@media screen and (min-width: 76.25em) {
  .md-footer-columns__inner {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2.4rem;
    padding: 1.2rem 1.2rem;
    text-align: left;
  }
  .md-footer-columns__brand {
    flex: 0 0 auto;
    padding-top: 0.2rem;
  }
  .md-footer-columns__nav {
    flex: 1 1 auto;
    gap: 2.4rem;
  }
  .md-footer-columns__brand {
    align-items: flex-start;
  }
  .md-footer-columns__brand .md-copyright {
    text-align: left;
  }
  .md-footer-columns__social {
    flex: 0 0 auto;
    align-items: flex-end;
  }
}