/* ── Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: #1e293b;
  background: #f8fafc;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Scroll Reveal (progressive enhancement) ──────── */
@media (prefers-reduced-motion: no-preference) {
  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s cubic-bezier(.22,.61,.36,1),
                transform 0.8s cubic-bezier(.22,.61,.36,1);
  }
  .reveal-up   { transform: translateY(0); }
  .reveal-left { transform: translateX(0); }
  .reveal-right { transform: translateX(0); }
}

/* Hidden state — only applied by JS for progressive enhancement */
.js-reveal .reveal-up,
.js-reveal .reveal-left,
.js-reveal .reveal-right {
  opacity: 0;
}
.js-reveal .reveal-up   { transform: translateY(32px); }
.js-reveal .reveal-left { transform: translateX(-32px); }
.js-reveal .reveal-right { transform: translateX(32px); }

/* ── Hero animations ──────────────────────────────── */
.hero-anim {
  opacity: 1;
  transform: translateY(0);
  animation: heroFadeUp 0.9s cubic-bezier(.22,.61,.36,1) forwards;
}
.hero-anim:nth-child(2) { animation-delay: 0.15s; }
.hero-anim:nth-child(3) { animation-delay: 0.3s; }
.hero-anim:nth-child(4) { animation-delay: 0.45s; }

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Navbar ───────────────────────────────────────── */
#nav {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}
#nav.scrolled {
  background: rgba(4, 47, 46, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
  padding-top: 0;
  padding-bottom: 0;
}
#nav.scrolled #nav-logo { color: #fff; }

/* ── Mobile Menu ──────────────────────────────────── */
#mobile-menu {
  pointer-events: none;
}
#mobile-menu.open {
  pointer-events: all;
  transform: translateX(0);
}
.mobile-link {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.2s ease;
}
#mobile-menu.open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}
#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* ── Smooth section transitions ───────────────────── */
section {
  scroll-margin-top: 80px;
}

/* ── Custom scrollbar ─────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #64748b; }

/* ── Selection ────────────────────────────────────── */
::selection { background: #99f6e4; color: #042f2e; }
</style>