/* ─── Base & Typography ─── */
*, *::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;
}

::selection {
  background: #5FBFBF;
  color: #0A1628;
}

/* ─── Scroll Indicator Animation ─── */
@keyframes scrollDown {
  0% { top: 0; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

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

/* ─── Mobile Menu ─── */
.mobile-link {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, color 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; }
.mobile-menu.open .mobile-link:nth-child(6) { transition-delay: 0.3s; }

/* ─── Service Cards ─── */
.service-card {
  transition: background-color 0.5s ease;
}

.service-card:hover {
  transform: translateY(-2px);
  transition: transform 0.3s ease, background-color 0.5s ease;
}

/* ─── Team Cards ─── */
.team-card {
  transition: transform 0.4s ease;
}

.team-card:hover {
  transform: translateY(-4px);
}

/* ─── Testimonial Cards ─── */
.testimonial-card {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.testimonial-card:hover {
  transform: translateY(-3px);
}

/* ─── Scroll Reveal (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    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.revealed {
    opacity: 1;
    transform: translateY(0);
  }

  .reveal-delay-1 { transition-delay: 0.1s; }
  .reveal-delay-2 { transition-delay: 0.2s; }
  .reveal-delay-3 { transition-delay: 0.3s; }
  .reveal-delay-4 { transition-delay: 0.4s; }
}

/* Fallback: ensure content is always visible */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ─── Nav Active State ─── */
nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(10, 22, 40, 0.06);
}

/* ─── Mobile Menu Button ─── */
.nav-line {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#menu-btn.active .nav-line:first-child {
  transform: rotate(45deg) translate(3px, 3px);
}

#menu-btn.active .nav-line:last-child {
  transform: rotate(-45deg) translate(3px, -3px);
  opacity: 0;
}