/* ===== RESET & 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;
}

::selection {
  background: rgba(95, 201, 142, 0.3);
  color: #f0f4ff;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #061130;
}
::-webkit-scrollbar-thumb {
  background: #1a4fe6;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #336dff;
}

/* ===== NAVIGATION ===== */
#nav {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#nav.scrolled {
  background: rgba(6, 17, 48, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* ===== MOBILE MENU ===== */
#mobileMenu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

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

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

/* ===== SERVICE CARDS ===== */
.service-card {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 0.4s ease, box-shadow 0.4s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(95, 201, 142, 0.15);
}

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    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; }
  .reveal-delay-5 { transition-delay: 0.5s; }
  .reveal-delay-6 { transition-delay: 0.6s; }
}

/* ===== FORM STYLES ===== */
select option {
  background: #0a1f5c;
  color: #f0f4ff;
}

input:focus, textarea:focus, select:focus {
  border-color: rgba(95, 201, 142, 0.5) !important;
  box-shadow: 0 0 0 3px rgba(95, 201, 142, 0.1) !important;
}

/* ===== FOCUS VISIBLE ===== */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid #5fc98e;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 767px) {
  .font-serif {
    word-spacing: -0.02em;
  }
}