header {
  width: 100%;
  position: relative;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
}
#header-2.sticky {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1030;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
}
#header-2 .navbar {
  padding: 0.8rem 1rem;
}
#header-2 .navbar-brand img {
  height: 50px;
}
#header-2 .nav-link {
  color: #fff !important;
  transition: color 0.3s;
  font-size: 1.1rem;
}
#header-2 .active {
  color: #ffc107 !important;
  font-size: 1.1rem;
}

#header-2 .nav-link:hover {
  color: #ffc107 !important;
}
#header-2 .navbar-toggler {
  border: none;
}
#header-2 .btn {
  font-weight: bold;
  border-radius: 50px;
  padding: 10px 20px;
}
#header-2 .btn-login {
  background-color: transparent;
  color: #fff;
  border: 2px solid #fff;
}
#header-2 .btn-login:hover {
  background-color: #fff;
  color: #000;
}
#header-2 .btn-register {
  background-color: #ffc107;
  color: #000;
  border: none;
}
#header-2 .btn-register:hover {
  background-color: #e0a800;
}



#link-section-5 {
  position: relative;
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

/* Sóng phía trên */
#link-section-5 .wave-top {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  line-height: 0;
  transform: translateY(-1px);
}
#link-section-5 .wave-top svg {
  display: block;
  width: 100%;
  height: 80px;
}

/* Sóng phía dưới */
#link-section-5 .wave-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  line-height: 0;
  transform: translateY(1px) rotate(180deg);
}
#link-section-5 .wave-bottom svg {
  display: block;
  width: 100%;
  height: 80px;
}

#link-section-5 .section-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}
#link-section-5 .section-subtitle {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Container liên kết */
#link-section-5 .link-container {
  max-width: 1100px;
  margin: 0 auto;
}
#link-section-5 .link-item {
  background: rgba(255,255,255,0.2);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-decoration: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, transform 0.3s;
}
#link-section-5 .link-item:hover {
  background: rgba(255,255,255,0.35);
  transform: translateY(-4px);
}
#link-section-5 .link-item i {
  font-size: 1.25rem;
  margin-right: 0.5rem;
}





/* Footer-16 Styles - Split Column with Image/Icon Focus */
#footer-16 {
  background-color: #e9edf0; /* Light, slightly cool grey */
  color: #3d4852; /* Dark grey/blue text */
  padding: 3.5rem 0;
  font-size: 0.9rem;
  position: relative;
}
#footer-16 .dominant-column-f16 {
  background-color: #ffffff; /* White or slightly off-white for contrast */
  padding: 2rem;
  border-radius: 6px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center; /* Center content within this column */
  text-align: center;
  margin-bottom: 2rem; /* Space when stacked on mobile */
}
@media (min-width: 992px) {
  /* On lg and up, make it taller or distinct */
  #footer-16 .dominant-column-f16 {
    /* min-height: calc(100% + 2rem); Slightly taller effect */
    /* transform: translateY(-1rem); Pull it up slightly for an overlap */
    margin-bottom: 0; /* Reset margin if side-by-side */
  }
}
#footer-16 .decorative-icon-f16 {
  font-size: 3.5rem; /* Large icon */
  color: #3498db; /* Primary accent color */
  margin-bottom: 1.25rem;
  line-height: 1; /* Ensure icon is not pushed down by line height */
}
#footer-16 .decorative-image-f16 {
  max-width: 120px; /* Control image size */
  max-height: 120px;
  border-radius: 50%; /* Circular image example */
  object-fit: cover;
  margin-bottom: 1.25rem;
  border: 3px solid #3498db; /* Accent border */
}
#footer-16 .site-logo-f16 {
  max-height: 45px;
  margin-bottom: 0.75rem;
}
#footer-16 .site-name-text-f16 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #2c3e50; /* Dark title color */
  text-decoration: none;
  margin-bottom: 0.5rem;
  display: block;
}
#footer-16 .site-name-text-f16:hover {
  color: #3498db;
}
#footer-16 .impactful-message-f16 {
  font-size: 0.95rem;
  color: #5a6872;
  line-height: 1.6;
  margin-top: 0.5rem;
}
#footer-16 .content-column-title-f16 {
  font-size: 1.05rem;
  font-weight: 500;
  color: #2c3e50;
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid #bdc3c7; /* Lighter border */
  display: inline-block;
}
#footer-16 .links-list-f16 {
  list-style: none;
  padding-left: 0;
}
#footer-16 .links-list-f16 li {
  margin-bottom: 0.5rem;
}
#footer-16 .links-list-f16 a {
  color: #3498db; /* Primary link color */
  text-decoration: none;
  transition: color 0.2s ease;
}
#footer-16 .links-list-f16 a:hover,
#footer-16 .links-list-f16 a.active {
  color: #2980b9; /* Darker shade on hover */
  text-decoration: underline;
}
#footer-16 .contact-details-f16 p,
#footer-16 .contact-details-f16 a {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: #5a6872;
  text-decoration: none;
}
#footer-16 .contact-details-f16 i {
  width: 18px;
  margin-right: 0.5rem;
  color: #3498db;
}
#footer-16 .contact-details-f16 a:hover {
  color: #2980b9;
}
#footer-16 .bottom-section-f16 {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid #d1d8de; /* Separator */
  text-align: center;
  font-size: 0.8rem;
  color: #7f8c8d; /* Muted color */
}
#footer-16 .partner-links-bottom-f16 {
  margin-bottom: 1rem;
}
#footer-16 .partner-links-bottom-f16 ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1rem;
}
#footer-16 .partner-links-bottom-f16 a {
  color: #3498db;
  font-size: 0.85rem;
  text-decoration: none;
}
#footer-16 .partner-links-bottom-f16 a:hover {
  color: #2980b9;
  text-decoration: underline;
}
#footer-16 .copyright-text-f16 p {
  margin-bottom: 0;
}
@media (max-width: 991.98px) {
  /* lg */
  #footer-16 .content-column-f16 {
    margin-bottom: 2rem; /* Space when columns stack */
    text-align: center; /* Center text in stacked content columns */
  }
  #footer-16 .content-column-title-f16 {
    display: block; /* Ensure border bottom spans width of text in center align */
    margin-left: auto;
    margin-right: auto;
  }
  #footer-16 .links-list-f16,
  #footer-16 .contact-details-f16 {
    /* For centered lists if needed */
  }
}