/* Base & Utilities */
* { box-sizing: border-box; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #020617; }
::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }

/* Service Cards */
.service-card {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.5s ease, background 0.5s ease;
}

/* Experience Cards */
.experience-card {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.5s ease;
}

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

/* Navbar scroll state */
.navbar-scrolled {
  background: rgba(2, 6, 23, 0.9) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(20, 184, 166, 0.08);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

/* Mobile menu transitions */
#mobile-menu {
  animation: slideDown 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hamburger animation */
.menu-line {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.3s ease;
}

#mobile-menu-btn.active .menu-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
#mobile-menu-btn.active .menu-line:nth-child(2) {
  opacity: 0;
}
#mobile-menu-btn.active .menu-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
  width: 24px;
  margin-left: 0;
}

/* Subtle gold accent line */
.gold-accent {
  background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.3), transparent);
  height: 1px;
  width: 100%;
}

/* Image hover effects */
img {
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Focus styles */
a:focus-visible, button:focus-visible {
  outline: 2px solid #2dd4bf;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Selection */
::selection {
  background: rgba(20, 184, 166, 0.3);
  color: #f1f5f9;
}

/* Smooth image loading */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}