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

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

body {
  overflow-x: hidden;
}

::selection {
  background: #c9a22b;
  color: #0d1b2a;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0d1b2a;
}
::-webkit-scrollbar-thumb {
  background: #1a3d5c;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #c9a22b;
}

/* Floating Cards Animation */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
}

.floating-card {
  animation: float 4s ease-in-out infinite;
}

.floating-card:nth-child(1) { animation-delay: 0s; }
.floating-card:nth-child(2) { animation-delay: -1s; }
.floating-card:nth-child(3) { animation-delay: -2s; }
.floating-card:nth-child(4) { animation-delay: -0.5s; }

/* Card Hover Effect */
.card-hover {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card-hover:hover {
  transform: translateY(-6px);
}

/* Scroll Reveal */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Navbar */
#navbar {
  background: transparent;
}

#navbar.scrolled {
  background: rgba(6, 15, 26, 0.92);
  backdrop-blur-xl;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Mobile Menu */
.mobile-link {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

#mobile-menu.closed {
  opacity: 0;
  pointer-events: none;
}

/* Menu Line Animation */
.menu-line {
  display: block;
}

#menu-btn.active .menu-line:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

#menu-btn.active .menu-line:nth-child(2) {
  opacity: 0;
}

#menu-btn.active .menu-line:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
  width: 20px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .floating-card {
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
  .card-hover:hover {
    transform: none;
  }
  .card-hover img {
    transition: none;
  }
}