@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  --color-primary: #ffffff;
  --color-secondary: #f5f5f5;
  --color-tertiary: #f9f6f2;
  --color-text-primary: #2d2d2d;
  --color-text-secondary: #6b6b6b;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--color-text-primary);
  background-color: var(--color-primary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.page-transition {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.image-hover {
  transition: var(--transition-base);
  overflow: hidden;
}

.image-hover img {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-hover:hover img {
  transform: scale(1.08);
}

.nav-link {
  position: relative;
  transition: var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 1px;
  background-color: var(--color-text-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.hero-slider {
  position: relative;
  overflow: hidden;
}

.hero-slide {
  opacity: 0;
  transition: opacity 1s ease-in-out;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-slide.active {
  opacity: 1;
  position: relative;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.collection-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.collection-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: white;
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.collection-card:hover .collection-overlay {
  transform: translateY(0);
}

.timeline-item {
  position: relative;
  padding-left: var(--spacing-lg);
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-text-primary);
  border: 2px solid var(--color-primary);
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 20px;
  width: 2px;
  height: calc(100% + var(--spacing-md));
  background-color: var(--color-secondary);
}

.timeline-item:last-child::after {
  display: none;
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-secondary);
  border-top-color: var(--color-text-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }

  .timeline-item {
    padding-left: var(--spacing-md);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 14px;
  }
}