/* ── Floating stat cards ── */
.floating-card {
  animation: float 4s ease-in-out infinite;
}
.card-1 { animation-delay: 0s; }
.card-2 { animation-delay: 0.8s; }
.card-3 { animation-delay: 1.6s; }

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

/* ── Scroll reveal (progressive enhancement) ── */
.scroll-reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal {
    opacity: 0;
    transform: translateY(32px);
  }
  .scroll-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Navbar scroll state ── */
#nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

/* ── Mobile menu open state ── */
#mobile-menu.open {
  display: block;
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Hamburger animation ── */
.menu-line {
  transition: transform 0.3s ease, opacity 0.3s ease;
}
#menu-btn.active .menu-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
#menu-btn.active .menu-line:nth-child(2) {
  opacity: 0;
}
#menu-btn.active .menu-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  width: 1.25rem;
}

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

/* ── Selection color ── */
::selection {
  background: #0d9488;
  color: white;
}

/* ── Focus visible ── */
:focus-visible {
  outline: 2px solid #0d9488;
  outline-offset: 2px;
}

/* ── Subtle image zoom on hover ── */
img {
  transition: transform 0.5s ease;
}