/* ===== BASE ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
.scroll-reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger children */
.grid .scroll-reveal:nth-child(1) { transition-delay: 0.05s; }
.grid .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
.grid .scroll-reveal:nth-child(3) { transition-delay: 0.15s; }
.grid .scroll-reveal:nth-child(4) { transition-delay: 0.2s; }
.grid .scroll-reveal:nth-child(5) { transition-delay: 0.25s; }
.grid .scroll-reveal:nth-child(6) { transition-delay: 0.3s; }

/* ===== HEADER SCROLL STATE ===== */
#site-header.scrolled {
  box-shadow: 0 1px 20px rgba(13, 148, 136, 0.08);
}

/* ===== MOBILE LINKS ===== */
.mobile-link {
  display: block;
}

/* ===== SELECTION ===== */
::selection {
  background: #99f6e4;
  color: #134e4a;
}

/* ===== FOCUS ===== */
a:focus-visible, button:focus-visible {
  outline: 2px solid #0d9488;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== SMOOTH IMAGE LOADING ===== */
img {
  display: block;
  max-width: 100%;
}