/* FOOTER PRINCIPAL */
.main-footer {
  background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  color: white;
  padding: 60px 0 20px;
  position: relative;
}

.main-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    135deg,
    var(--chu-blue) 0%,
    var(--chu-green) 100%
  );
}

.chu-logo {
  height: 50px;
  width: auto;
  margin-bottom: 20px;
  /* Supprimé: filter: brightness(0) invert(1); */
  transition: transform 0.3s ease;
}

.chu-logo:hover {
  transform: scale(1.05);
}

.main-footer p {
  color: #bdc3c7;
  line-height: 1.6;
  margin-bottom: 25px;
}

/* SOCIAL LINKS */
.social-links {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-links a:hover {
  background: var(--chu-blue);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 86, 166, 0.4);
}

/* FOOTER SECTIONS */
.main-footer h5 {
  color: white;
  font-weight: 600;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 10px;
}

.main-footer h5::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--chu-blue);
}

.footer-links a {
  color: #bdc3c7;
  text-decoration: none;
  display: block;
  margin-bottom: 12px;
  transition: all 0.3s ease;
  padding: 5px 0;
  position: relative;
  padding-left: 15px;
}

.footer-links a::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--chu-blue);
  transition: transform 0.3s ease;
}

.footer-links a:hover {
  color: white;
  padding-left: 20px;
}

.footer-links a:hover::before {
  transform: translateX(5px);
}

.footer-links p {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  color: #bdc3c7;
}

.footer-links i {
  width: 20px;
  margin-right: 10px;
  color: var(--chu-blue);
}

/* FOOTER BOTTOM */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 25px;
  margin-top: 40px;
  text-align: center;
}

.footer-bottom p {
  color: #95a5a6;
  margin-bottom: 0;
  font-size: 0.9rem;
}

.footer-bottom a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-bottom a:hover {
  color: white;
}

/* RESPONSIVE FOOTER */
@media (max-width: 768px) {
  .main-footer {
    text-align: center;
    padding: 40px 0 20px;
  }

  .main-footer h5::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-links a::before {
    display: none;
  }

  .footer-links a:hover {
    padding-left: 15px;
  }

  .social-links {
    justify-content: center;
  }

  .chu-logo {
    margin: 0 auto 20px;
    display: block;
  }
}

@media (max-width: 576px) {
  .main-footer .col-lg-3 {
    margin-bottom: 30px;
  }

  .social-links a {
    width: 40px;
    height: 40px;
  }
}