.bk-footer {
  background: var(--bk-bg-secondary, #F5F5F7);
  border-top: 1px solid var(--bk-border, #D2D2D7);
  padding: 52px 0 28px;
}

.bk-footer-grid {
  display: grid;
  gap: 36px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .bk-footer-grid { grid-template-columns: 1.1fr 0.8fr 1.4fr 1.1fr; gap: 28px; }
}

.bk-footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--bk-text-primary, #1D1D1F);
}
.bk-footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(0, 113, 227, 0.12);
  font-size: 17px;
  flex: 0 0 auto;
}
.bk-footer-tagline { margin: 10px 0 0; font-size: 13.5px; color: var(--bk-text-muted, #6E6E73); line-height: 1.6; }

.bk-footer-col h3 {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 800;
  color: var(--bk-text-primary, #1D1D1F);
}
.bk-footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.bk-footer-col ul a {
  font-size: 14px;
  color: var(--bk-text-muted, #6E6E73);
  text-decoration: none;
  transition: color 0.15s ease;
}
.bk-footer-col ul a:hover { color: var(--bk-accent, #0071E3); }

.bk-footer-region-grid {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 10px 22px;
}
@media (min-width: 900px) {
  .bk-footer-region-grid { grid-template-columns: repeat(3, auto); }
}
.bk-footer-region-grid a {
  font-size: 14px;
  color: var(--bk-text-muted, #6E6E73);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}
.bk-footer-region-grid a:hover { color: var(--bk-accent, #0071E3); }

.bk-footer-disclaimer {
  margin: 40px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--bk-border, #D2D2D7);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--bk-text-muted, #6E6E73);
}