/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

/* Offset for fixed header */
section[id] {
  scroll-margin-top: 80px;
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Nav link underline slide-in */
.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #2AAD8E;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* About section: glass panels over photo background */
.about-glass {
  background: rgba(12, 28, 24, 0.42);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.about-bg-img {
  object-position: 95% center;
  transform: scale(1.06);
}