/* ── Base ── */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }

  .reveal-up {
    transform: translateY(32px);
  }

  .reveal-left {
    transform: translateX(-32px);
  }

  .reveal-right {
    transform: translateX(32px);
  }

  .reveal-up.revealed,
  .reveal-left.revealed,
  .reveal-right.revealed {
    opacity: 1;
    transform: translate(0, 0);
  }
}

/* ── Scroll Line Animation ── */
@keyframes scrollLine {
  0% {
    opacity: 0;
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: scaleY(1);
    transform-origin: top;
  }
}

.animate-scroll-line {
  animation: scrollLine 2s ease-in-out infinite;
}

/* ── Navbar ── */
#nav.scrolled {
  background: rgba(4, 47, 46, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: white;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

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

.mobile-link {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

/* ── Menu Hover Lines ── */
#menu .group:hover .h-px {
  background: rgba(17, 94, 89, 0.15);
  transition: background 0.3s ease;
}

/* ── Selection ── */
::selection {
  background: rgba(17, 94, 89, 0.15);
  color: #042f2e;
}