/* ============================================
   RANK BOOSTER — Footer (E-E-A-T)
   ============================================ */

.rb-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-4xl) 0 0;
}

.rb-footer a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

.rb-footer a:hover {
  color: var(--color-white);
}

/* ── 4-column grid ── */
.rb-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: var(--space-3xl);
}

/* Column base — intentional: no shared styles needed */

/* ── Column: Brand ── */
.rb-footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  margin-bottom: var(--space-lg);
}

.rb-footer__brand-icon {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.rb-footer__brand-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
}

.rb-footer__about {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-xl);
}

/* ── Social icons ── */
.rb-footer__social {
  display: flex;
  gap: var(--space-sm);
}

.rb-footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

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

.rb-footer__social-link svg {
  width: 16px;
  height: 16px;
  color: rgba(255,255,255,0.7);
}

.rb-footer__social-link:hover svg {
  color: #fff;
}

/* ── Column: Headings & Links ── */
.rb-footer__heading {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-lg);
}

.rb-footer__links li {
  margin-bottom: var(--space-sm);
}

.rb-footer__links a {
  font-size: var(--font-size-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: all var(--transition-fast);
}

.rb-footer__links a:hover {
  color: #fff;
  transform: translateX(4px);
}

/* ── Column: Contact list ── */
.rb-footer__contact-list li {
  margin-bottom: var(--space-md);
}

.rb-footer__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

.rb-footer__contact-item:hover {
  color: #fff;
}

.rb-footer__contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-primary);
  opacity: 0.8;
}

/* ── Newsletter ── */
.rb-footer__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.rb-footer__form .rb-input {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  padding: 0.625rem 1rem;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  flex: 1;
}

.rb-footer__form .rb-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.rb-footer__form .rb-input:focus {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.2);
}

.rb-footer__form .rb-btn {
  padding: 0.625rem 1rem;
}

.rb-footer__form .rb-btn svg {
  width: 16px;
  height: 16px;
}

.rb-footer__form-note {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
  line-height: var(--line-height-normal);
}

/* ── Bottom bar ── */
.rb-footer__bottom {
  margin-top: var(--space-3xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-lg) 0;
}

.rb-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rb-footer__copyright {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
}

.rb-footer__legal {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.rb-footer__legal a {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
}

.rb-footer__legal a:hover {
  color: rgba(255, 255, 255, 0.8);
}

.rb-footer__legal-sep {
  color: rgba(255, 255, 255, 0.15);
  font-size: var(--font-size-xs);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .rb-footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  .rb-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .rb-footer__bottom-inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .rb-footer__links a:hover {
    transform: none;
  }
}