#header-4 {
  background-color: #ffffff;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  z-index: 1030;
  position: sticky;
  top: 0;
  width: 100%;
}
#header-4 .navbar {
  padding: 0.75rem 1rem;
}
#header-4 .navbar-brand img {
  height: 40px;
}
#header-4 .navbar-nav .nav-link {
  color: #333;
  font-weight: 500;
  padding: 0.5rem 1rem;
}
#header-4 .navbar-nav .nav-link:hover,
#header-4 .navbar-nav .nav-link.active {
  color: #007bff;
}
#header-4 .cta-button {
  background-color: #007bff;
  color: #fff;
  padding: 0.5rem 1.25rem;
  border-radius: 25px;
  font-weight: 600;
  transition: all 0.3s ease;
}
#header-4 .cta-button:hover {
  background-color: #0056b3;
  color: #fff;
}
#header-4 .tagline {
  font-size: 0.875rem;
  color: #666;
  text-align: center;
  margin-top: 0.25rem;
}
@media (max-width: 767.98px) {
  #header-4 .cta-button {
    margin-top: 0.75rem;
    width: 100%;
  }
  #header-4 .tagline {
    font-size: 0.75rem;
  }
}



#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-12 Styles */
#footer-12 {
  /* Gradient background set inline */
  color: var(--footer-text-color, #ffffff);
  padding: 4rem 0 2rem 0;
  position: relative;
  overflow: hidden; /* For any pseudo-elements that might go outside */
  font-size: 0.9rem;
}
/* Optional: decorative pseudo-element for asymmetrical design */
#footer-12::before {
  content: "";
  position: absolute;
  top: -50px;
  left: -50px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 50%;
  opacity: 0.5;
  pointer-events: none; /* So it doesn't interfere with clicks */
}
#footer-12::after {
  content: "";
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.04);
  transform: rotate(45deg);
  opacity: 0.5;
  pointer-events: none;
}
#footer-12 .footer-column-f12 {
  position: relative; /* Ensure columns are above pseudo-elements */
  z-index: 2;
  margin-bottom: 2rem; /* Spacing for stacked columns */
}
#footer-12 .main-column-f12 {
  /* Column 1 - Logo, Quote */
  padding: 1.5rem;
  background-color: var(--footer-col1-bg, rgba(255, 255, 255, 0.05));
  border-radius: 8px;
  min-height: 100%; /* Make columns in the same row appear same height if desired */
  display: flex;
  flex-direction: column;
  justify-content: center;
}
#footer-12 .footer-logo-f12 {
  max-height: 60px; /* Adjust */
  margin-bottom: 1.5rem;
  /* filter: brightness(0) invert(1); */ /* Light logo for dark bg */
}
#footer-12 .quote-block-f12 .quote-text {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--footer-quote-color, #e0e0e0);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}
#footer-12 .quote-block-f12 .quote-author {
  font-size: 0.9rem;
  color: var(--footer-quote-color, #e0e0e0);
  opacity: 0.8;
  text-align: right;
}
#footer-12 .column-title-f12 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--footer-title-color, #ffffff);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
#footer-12 .links-list-f12 {
  list-style: none;
  padding-left: 0;
}
#footer-12 .links-list-f12 li {
  margin-bottom: 0.6rem;
}
#footer-12 .links-list-f12 a {
  color: var(--footer-link-color, #f0f0f0);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
#footer-12 .links-list-f12 a:hover,
#footer-12 .links-list-f12 a.active {
  color: var(--footer-link-hover-color, #ffffff);
  padding-left: 6px;
  text-decoration: none; /* Or underline if preferred */
}
#footer-12 .contact-short-f12 p,
#footer-12 .contact-short-f12 a {
  margin-bottom: 0.3rem;
  color: var(--footer-link-color, #f0f0f0);
  text-decoration: none;
}
#footer-12 .contact-short-f12 i {
  margin-right: 0.5rem;
}
#footer-12 .contact-short-f12 a:hover {
  color: var(--footer-link-hover-color, #ffffff);
}
#footer-12 .social-icons-list-f12 a {
  color: var(--footer-link-color, #f0f0f0);
  margin: 0 0.5rem 0.5rem 0;
  font-size: 1.3rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block; /* For transform */
}
#footer-12 .social-icons-list-f12 a:hover {
  color: var(--footer-link-hover-color, #ffffff);
  transform: translateY(-2px);
}
#footer-12 .partner-links-f12 ul {
  margin-top: 0.5rem; /* Space if social icons are above */
}
#footer-12 .bottom-copyright-line-f12 {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid
    var(--footer-bottom-line-color, rgba(255, 255, 255, 0.3));
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.8;
}
#footer-12 .bottom-copyright-line-f12 p {
  margin-bottom: 0;
}