/* === Base & Utilities === */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Navbar === */
#navbar {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
  background: rgba(255, 251, 245, 0.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 20px rgba(5, 158, 105, 0.08);
}

.nav-link {
  position: relative;
}

/* === Stat Cards (Hero) === */
.stat-card {
  animation: floatIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.card-1 { animation-delay: 0.3s; }
.card-2 { animation-delay: 0.5s; }
.card-3 { animation-delay: 0.7s; }
.card-4 { animation-delay: 0.9s; }

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.stat-card {
  animation: floatGentle 4s ease-in-out infinite;
}

.card-2 { animation-delay: 0.5s; }
.card-3 { animation-delay: 1s; }
.card-4 { animation-delay: 1.5s; }

@keyframes floatGentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* === Scroll Reveal === */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .stat-card {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
  .reveal {
    transition: none;
  }
}

/* === Mobile Menu === */
#mobileMenu {
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 500px;
  }
}

.mobile-link {
  display: block;
}

/* === Selection === */
::selection {
  background: rgba(5, 158, 105, 0.2);
  color: #064E3B;
}

/* === Custom scrollbar === */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #FFFBF5;
}
::-webkit-scrollbar-thumb {
  background: #A7F3D0;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #34D399;
}