/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }
img, svg { display: block; max-width: 100%; }
a { text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Navbar scroll state ── */
#site-header.scrolled {
  background: rgba(2, 44, 34, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

/* ── Nav links ── */
.nav-link { position: relative; }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #6ee7b7;
  border-radius: 2px;
  transition: width 0.25s ease;
}
.nav-link:hover::after { width: 100%; }

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

/* ── Scroll reveal ── */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}

/* ── Scroll hint animation ── */
@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}
.scroll-hint svg {
  animation: bounce-down 1.8s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) {
  .scroll-hint svg { animation: none; }
}

/* ── Card hover ── */
.card { will-change: transform; }

/* ── Focus styles ── */
:focus-visible {
  outline: 2px solid #10b981;
  outline-offset: 2px;
}