:root {
  /* JWC Design System - Color Primitives */
  --color-lime-4: #D8FF86;
  --color-chacoal-10: #1C1C1C;

  /* Typography */
  --font-family-linden: "Linden Hill", "Times New Roman", serif;
  --font-family-maru: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", sans-serif;

  --font-size-48: 48px;
  --font-size-20: 20px;
  --font-size-16: 16px;

  --line-height-48: 1.5;
  --line-height-trim: 1;

  /* Spacing */
  --space-16: 16px;
}

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

body {
  font-family: var(--font-family-maru);
  font-size: var(--font-size-16);
  line-height: 1.5;
  color: var(--color-lime-4);
  background: var(--color-chacoal-10);
  overflow: hidden;
}

/* Hero Section */
.hero-section {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-section__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero-section__bg ul {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-section__bg li {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 8s ease-in-out;
}

.hero-section__bg li.active {
  opacity: 1;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.hero-section__inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 24px;
}

.hero-section__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-16);
  text-align: center;
}

.hero-section__logo {
  width: 120px;
  height: 72px;
  display: block;
  margin: 0;
}

.hero-section__subtitle {
  font-family: var(--font-family-linden);
  font-weight: 400;
  font-size: var(--font-size-20);
  line-height: 1.6;
  color: var(--color-lime-4);
  margin: 0;
  opacity: 0.9;
}

/* Loading State */
.hero-section__bg li.loading {
  background-color: var(--color-chacoal-10);
}

.hero-section__content {
  opacity: 0;
  animation: fadeInContent 1s ease-in 0.5s forwards;
}

@keyframes fadeInContent {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Performance optimizations */
.hero-section__bg li {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Apply will-change only during transitions */
.hero-section__bg li.transitioning {
  will-change: opacity;
}

/* Responsive Design */
@media (min-width: 768px) {
  .hero-section__logo {
    width: 160px;
    height: 96px;
  }

  .hero-section__subtitle {
    font-size: 24px;
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .hero-section__bg li {
    transition: opacity 0.5s ease-in-out;
  }

  .hero-section__content {
    animation: none;
    opacity: 1;
  }
}