/* ==========================================================================
   Footer
   Background image + CSS gradient overlay (darkest at bottom, lighter at
   top) — gradient is pure CSS, not baked into the photo, per spec 3.5.
   ========================================================================== */

.site-footer {
  position: relative;
  color: var(--color-white);
  background-image:
    linear-gradient(to bottom, rgba(22, 29, 48, 0.55) 0%, rgba(18, 20, 28, 0.96) 100%),
    url("../img/footer-bg-mobile.webp");
  background-size: cover;
  background-position: center;
  padding-block-start: var(--space-16);
  padding-block-end: var(--space-8);
}

@media (min-width: 1024px) {
  .site-footer {
    background-image:
      linear-gradient(to bottom, rgba(22, 29, 48, 0.5) 0%, rgba(18, 20, 28, 0.95) 100%),
      url("../img/footer-bg-desktop.webp");
  }
}

.site-footer__cta {
  text-align: center;
  padding-block-end: var(--space-8);
  border-block-end: 1px solid rgba(255, 255, 255, 0.15);
  margin-block-end: var(--space-8);
}

.site-footer__cta a {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: #ffffff;
}

.site-footer__brand {
  text-align: center;
  margin-block-end: var(--space-12);
}

.site-footer__brand img {
  block-size: 56px;
  inline-size: auto;
  margin-inline: auto;
  margin-block-end: var(--space-3);
}

.site-footer__brand p {
  font-weight: 700;
  font-size: var(--fs-h4);
}

.site-footer__columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-block-end: var(--space-12);
}

@media (min-width: 768px) {
  .site-footer__columns {
    grid-template-columns: repeat(3, 1fr);
  }
}

.site-footer__col h3 {
  font-size: var(--fs-small);
  color: var(--color-accent);
  margin-block-end: var(--space-4);
}

.site-footer__col-info {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--fs-small);
  color: var(--text-muted-on-dark);
  margin-block-end: var(--space-3);
}

.site-footer__col-icon {
  inline-size: 18px;
  block-size: 18px;
  flex-shrink: 0;
  margin-block-start: 2px;
  color: var(--color-accent);
}

/* Vertical labeled buttons — used for both "ارتباط سریع" and "ما را دنبال کنید" columns */
.footer-social-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-social-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-white);
  transition: background-color var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}

.footer-social-btn svg {
  inline-size: 20px;
  block-size: 20px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.footer-social-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.3);
}

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-block-start: var(--space-6);
  border-block-start: 1px solid rgba(255, 255, 255, 0.15);
  font-size: var(--fs-small);
  color: var(--text-muted-on-dark);
}

@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.site-footer__bottom .lang-switch a {
  color: var(--text-muted-on-dark);
}

.site-footer__bottom .lang-switch a[aria-current="true"] {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
}