/* =========================================== */
/* FULL-SCREEN NAVIGATION MENU */
/* Animated Overlay, Particles, Previews */
/* =========================================== */

/* Full-Screen Nav Overlay */
.fullscreen-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  overflow: hidden;
}

.fullscreen-nav.active {
  opacity: 1;
  visibility: visible;
}

/* Particle Background */
.nav-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.nav-particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(99, 102, 241, 0.6);
  border-radius: 50%;
  animation: navParticleFloat 15s infinite ease-in-out;
}

@keyframes navParticleFloat {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) translateX(50px);
    opacity: 0;
  }
}

/* Navigation Content */
.nav-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 2rem;
}

/* Close Button */
.nav-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.nav-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.nav-close i {
  font-size: 1.5rem;
  color: white;
}

/* Navigation Links */
.nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

.nav-links li {
  margin: 1.5rem 0;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.fullscreen-nav.active .nav-links li {
  opacity: 1;
  transform: translateY(0);
}

.nav-links li:nth-child(1) { transition-delay: 0.1s; }
.nav-links li:nth-child(2) { transition-delay: 0.2s; }
.nav-links li:nth-child(3) { transition-delay: 0.3s; }
.nav-links li:nth-child(4) { transition-delay: 0.4s; }
.nav-links li:nth-child(5) { transition-delay: 0.5s; }
.nav-links li:nth-child(6) { transition-delay: 0.6s; }

.nav-links a {
  display: inline-block;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 1rem;
}

.nav-links a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #d946ef);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: #6366f1;
  transform: translateX(10px);
}

.nav-links a:hover::before {
  width: 100%;
}

/* Category Previews */
.nav-category-preview {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 300px;
  max-width: calc(100vw - 2rem);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 3;
}

.nav-links li:hover .nav-category-preview {
  opacity: 1;
}

.nav-preview-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 1.5rem;
  color: white;
}

.nav-preview-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.nav-preview-card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.nav-preview-card p {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .nav-links a {
    font-size: 2rem;
  }
  
  .nav-category-preview {
    display: none;
  }
  
  .nav-close {
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .nav-links li {
    opacity: 1;
    transform: none;
    transition: none;
  }
  
  .nav-particle {
    animation: none;
  }
}