/* ─── Base & Utilities ─── */
*, *::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) ─── */
@media (prefers-reduced-motion: no-preference) {
  .reveal-section { opacity: 1; transform: none; }
  .reveal-card { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  .reveal-section {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal-section.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .reveal-card.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Nav ─── */
.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }

/* ─── Mobile Menu ─── */
#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

/* ─── Hero Animations ─── */
@media (prefers-reduced-motion: no-preference) {
  .hero-sub.is-visible { opacity: 1; transform: translateY(0); }
  .hero-word.is-visible { opacity: 1; transform: translateY(0); }
  .hero-desc.is-visible { opacity: 1; transform: translateY(0); }
  .hero-cta.is-visible { opacity: 1; transform: translateY(0); }
}

/* ─── Scroll Indicator ─── */
.scroll-indicator { animation: pulse-down 2s ease-in-out infinite; }
@keyframes pulse-down {
  0%, 100% { opacity: 0.4; transform: translateY(0); }
  50% { opacity: 0.8; transform: translateY(6px); }
}

/* ─── Thin Separator Lines ─── */
.separator {
  width: 48px;
  height: 1px;
  background: currentColor;
  opacity: 0.2;
}

/* ─── Form Focus Styles ─── */
input:focus, textarea:focus {
  outline: none;
  box-shadow: 0 0 0 1px currentColor;
  box-shadow: 0 0 0 1px rgb(16 185 129 / 0.5);
}

/* ─── Selection ─── */
::selection {
  background: rgb(16 185 129 / 0.2);
  color: rgb(6 78 59);
}