.full-footer {
  background: #0056b3; /* xanh dương đậm giống ảnh */
  color: white;
  padding: 50px 0 30px;
}

.footer-columns {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
}

.footer-column {
  flex: 1;
  min-width: 280px;
}

.footer-column h4 {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 15px;
  text-transform: uppercase;
}

.footer-hr {
  width: 10%;
  border: none;
  border-top: 2px solid rgba(255, 255, 255, 0.3);
  margin: 10px 0 20px;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
  line-height: 1.8;
}

.footer-column li {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.footer-column a {
  color: white;
  text-decoration: none;
}

.footer-column a:hover {
  text-decoration: underline;
}

.bct-logo {
  width: 120px;
  height: auto;
  margin-top: 5px;
}

.social-icons {
  margin: 5px 0;
}

.social-icons a {
  margin: 0 5px;
}

.social-icons img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1); /* làm trắng icon */
  transition: transform 0.3s;
}

.social-icons a:hover img {
  transform: scale(1.15);
}

/* Footer bottom */
.full-footer-bottom {
  background: #003366; /* xanh đậm hơn */
  color: #ccc;
  font-size: 16px;
  padding: 10px 0;
  text-align: center;
}