/* Global Settings */
:root {
  --font-primary: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --color-bg: #F8F9FA;
  --color-text-main: #212529;
  --transition-smooth: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in-section {
  animation: fadeIn 1s ease-out forwards;
  opacity: 0; 
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

/* Image Hover Effects */
.img-zoom-container {
  overflow: hidden;
  position: relative;
  display: block;
}

.img-zoom-container img {
  transition: transform 0.8s ease;
  will-change: transform;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-zoom-container:hover img {
  transform: scale(1.05);
}

/* Glassmorphism Navigation */
.nav-glass {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

/* Typography Enhancements */
.text-balance {
  text-wrap: balance;
}

.tracking-loose {
  letter-spacing: 0.15em;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background-color: rgba(0, 0, 0, 0.3);
}

/* Dynamic Slot Placeholder */
.app-slot {
  display: none; /* Hidden by default, activated via JS if needed */
  border: 1px dashed #e5e7eb;
  padding: 1rem;
  margin: 1rem 0;
  text-align: center;
  color: #9ca3af;
  font-size: 0.875rem;
}

/* Mobile Menu Transition */
.mobile-menu-enter {
  transform: translateY(-100%);
  opacity: 0;
}
.mobile-menu-enter-active {
  transform: translateY(0);
  opacity: 1;
  transition: var(--transition-smooth);
}