/* ==========================================================================
   FOOTER — brand + tagline + CTA · navigation · legal · oversized wordmark
   ========================================================================== */

.site-footer {
  position: relative;
  padding-top: var(--space-9);
  background: var(--bg1);
  color: var(--color1);
  overflow: clip;
}

/* ---- Top row ------------------------------------------------------------- */
.footer-top {
  row-gap: var(--space-7);
}

.footer-brand {
  grid-column: 1 / span 5;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand__logo {
  border-radius: var(--radius-xs);
}

.footer-brand__logo .wordmark {
  --wordmark-size: 4rem;
}

.footer-tagline {
  max-width: 34rem;
  margin-top: var(--space-5);
  color: var(--muted);
  font-size: var(--text-body-lg);
  line-height: 1.35;
}

.footer-brand__cta {
  margin-top: var(--space-6);
}

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

.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer-col--nav   { grid-column: 7 / span 3; }
.footer-col--legal { grid-column: 11 / span 2; }

.footer-col__title {
  color: var(--ink-500);
}

.footer-nav__list {
  display: flex;
  flex-direction: column;
}

.footer-nav__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--line);
  font-size: var(--text-body);
  transition: color var(--duration-fast) ease;
}

.footer-nav__num {
  color: var(--ink-500);
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: var(--tracking-mono);
  transition: color var(--duration-fast) ease;
}

.footer-nav__link:is(:hover, :focus-visible) .footer-nav__num {
  color: var(--color-accent);
}

/* External link (back to Nexoss Consulting): small arrow at the end of the row */
.footer-nav__link .icon {
  width: 1.4rem;
  height: 1.4rem;
  margin-left: auto;
  align-self: center;
  color: var(--ink-500);
}

.footer-legal-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--muted);
  font-size: var(--text-small);
}

.footer-legal-list a {
  transition: color var(--duration-fast) ease;
}

.footer-legal-list a:is(:hover, :focus-visible) {
  color: var(--color1);
}

/* ---- Oversized wordmark (decorative sign-off) ---------------------------- */
.footer-mark {
  display: flex;
  justify-content: center;
  margin-top: var(--space-9);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.footer-mark .wordmark {
  /* "Nexoss IA" is ≈4.1em wide: fill the grid width */
  --wordmark-size: calc(var(--grid-width) / 4.15);
  margin-bottom: var(--space-5);
  color: var(--ink-900);
}

.footer-mark .wordmark__tag {
  background: var(--ink-900);
  color: var(--ink-950);
  box-shadow: inset 0 0 0 1px var(--ink-800);
}

/* ---- Bottom row ---------------------------------------------------------- */
.footer-bottom {
  position: relative;
  align-items: center;
  padding-block: var(--space-5);
  border-top: 1px solid var(--line);
  background: var(--bg1);
  color: var(--ink-400);
}

.footer-legal {
  grid-column: 1 / span 6;
}

.back-to-top {
  grid-column: 7 / span 6;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-radius: var(--radius-xs);
  color: var(--ink-400);
  text-transform: uppercase;
  white-space: nowrap;
  transition: color var(--duration-fast) ease;
}

.back-to-top:hover {
  color: var(--color1);
}

.back-to-top__icon {
  display: block;
  width: 3.2rem;
  height: 3.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--color1);
}

.back-to-top__icon .icon {
  width: 1.6rem;
  height: 1.6rem;
}

/* Social profiles (markup commented in index.html until they exist) */
.footer-socials {
  display: flex;
  gap: var(--space-2);
}

.footer-socials a {
  display: block;
  border-radius: var(--radius-sm);
  transition: background-color var(--duration-base) ease, color var(--duration-base) ease;
}

.footer-socials a:hover {
  background: var(--white);
  color: var(--ink-950);
}

.footer-socials .icon {
  width: 3.6rem;
  height: 3.6rem;
}

/* ---- Tablet -------------------------------------------------------------- */
@media (max-width: 1023px) {
  .footer-brand      { grid-column: 1 / -1; }
  .footer-col--nav   { grid-column: 1 / span 7; }
  .footer-col--legal { grid-column: 9 / span 4; }
}

/* ---- Mobile -------------------------------------------------------------- */
@media (max-width: 767px) {
  .site-footer {
    padding-top: var(--space-8);
  }

  .footer-brand__logo .wordmark {
    --wordmark-size: 3.2rem;
  }

  .footer-col--nav,
  .footer-col--legal {
    grid-column: 1 / -1;
  }

  .footer-mark {
    margin-top: var(--space-8);
  }

  .footer-legal {
    grid-column: 1 / span 3;
  }

  .back-to-top {
    grid-column: 4 / span 3;
  }
}