/* Base & Utilities */
html {
  scroll-behavior: smooth;
}

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

/* Scroll Reveal — progressive enhancement, hidden by default for JS-less readers */
@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .scroll-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Navbar scroll state */
nav.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #0f172a;
}

::-webkit-scrollbar-thumb {
  background: #0d9488;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #14b8a6;
}

/* Selection color */
::selection {
  background: rgba(13, 148, 136, 0.3);
  color: #f0fdfa;
}

/* Image hover container */
img {
  max-width: 100%;
  height: auto;
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #2dd4bf;
  outline-offset: 2px;
  border-radius: 4px;
}