/* ─── 22. Footer ─────────────────────────────────────────────────────── */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  margin-top: auto;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--sp-2xl);
  padding-block: var(--sp-3xl);
  align-items: start;
}

/* Brand column */
.footer__brand .navbar__logo { display: inline-flex; margin-bottom: var(--sp-md); }
.footer__tagline {
  font-size: .9375rem;
  color: var(--clr-text-muted);
  max-width: 28ch;
  margin-bottom: var(--sp-lg);
}

/* Social icons row */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--r-md);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  transition: background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.social-links a:hover {
  background: rgba(123,111,245,.15);
  border-color: rgba(123,111,245,.4);
  color: var(--clr-primary-light);
  transform: translateY(-2px);
}
.social-links svg { width: 18px; height: 18px; }

/* Links column */
.footer__links h4,
.footer__links .footer__acc-btn,
.footer__contact h4,
.footer__contact .footer__acc-btn {
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--sp-md);
}

/* Accordion button – desktop: behaves as a static heading */
.footer__acc-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: default;
  text-align: left;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer__acc-chevron { display: none; }
.footer__acc-body    { display: block; }

.footer__links ul,
.footer__contact ul {
  display: flex;
  flex-direction: column;
  gap: .625rem;
}

.footer__links a,
.footer__contact a {
  font-size: .9375rem;
  color: var(--clr-text-muted);
  transition: color var(--dur-fast) var(--ease), padding-left var(--dur-fast) var(--ease);
}
.footer__links a:hover,
.footer__contact a:hover {
  color: var(--clr-primary-light);
  padding-left: 4px;
}

/* Contact column: non-link items */
.footer__contact li {
  font-size: .9375rem;
  color: var(--clr-text-muted);
}

/* Bottom bar */
.footer__bottom {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--sp-lg);
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.footer__bottom p {
  font-size: .875rem;
  color: var(--clr-text-dim);
}
.footer__bottom strong { color: var(--clr-text-muted); }

/* ── Footer responsive ──────────────────────────────────────────────── */
@media (max-width: 992px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }
  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-xl);
    padding-block: var(--sp-2xl);
  }
  .footer__brand { grid-column: unset; }
  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }

  /* Accordion: interactive on mobile */
  .footer__acc-btn {
    border-bottom: 1px solid var(--clr-border);
    padding-block: var(--sp-md);
    cursor: pointer;
    margin-bottom: 0;
  }
  .footer__acc-chevron {
    display: block;
    flex-shrink: 0;
    transition: transform .25s ease;
  }
  .footer__acc-btn[aria-expanded="true"] .footer__acc-chevron {
    transform: rotate(180deg);
  }
  .footer__acc-body {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height .3s ease, opacity .2s ease;
  }
  .footer__acc-btn[aria-expanded="true"] + .footer__acc-body {
    max-height: 400px;
    opacity: 1;
    padding-top: var(--sp-md);
  }
}