:root {
  --white: #FFFFFF;
  --black: #000000;
  --gray-700: #4A4A4A;
  --gray-300: #E5E5E5;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--white);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 30px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.nav-link {
  color: var(--black);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: opacity 0.3s ease;
  letter-spacing: 1px;
}

.nav-left {
  position: absolute;
  left: 40px;
}

.nav-link:hover {
  opacity: 0.5;
}

/* Hero Video Section */
.hero-section {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
}

.hero-video-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
}

.hero-video-bg video {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  min-width: 100%;
  min-height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  pointer-events: none;
  z-index: 0;
}

/* Product Container */
.product-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 120px 40px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

/* Product Image */
.product-image-section {
  position: sticky;
  top: 120px;
}

.product-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Product Details */
.product-details-section {
  padding-top: 40px;
}

.product-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.product-price {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  margin-bottom: 40px;
  color: var(--black);
  letter-spacing: 0.02em;
}

.product-price em {
  font-style: italic;
}

.product-price u {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.product-description {
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.8;
  color: var(--black);
  margin-bottom: 40px;
}

.product-description p {
  margin-bottom: 24px;
}

.product-includes {
  margin: 32px 0;
  padding: 24px 0;
  border-top: 1px solid var(--gray-300);
  border-bottom: 1px solid var(--gray-300);
}

.product-includes strong {
  font-weight: 600;
}

.product-includes ul {
  list-style: none;
  margin-top: 16px;
}

.product-includes li {
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
}

.product-includes li:before {
  content: '–';
  position: absolute;
  left: 0;
}

.shipping-note {
  font-style: italic;
  color: var(--gray-700);
}

.final-note {
  font-weight: 600;
  margin-top: 24px;
}

/* Inquire Button */
.inquire-btn {
  display: inline-block;
  background-color: var(--black);
  color: var(--white);
  border: none;
  padding: 18px 60px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: opacity 0.3s ease;
  margin-top: 40px;
  font-family: 'Inter', sans-serif;
  text-decoration: none;
  text-align: center;
}

.inquire-btn:hover {
  opacity: 0.8;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 20px;
  background-color: var(--white);
  color: var(--gray-700);
  font-size: 14px;
  border-top: 1px solid var(--gray-300);
}

/* Responsive */
@media (max-width: 968px) {
  .product-container {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 100px 30px 60px;
  }

  .product-image-section {
    position: relative;
    top: 0;
  }

  .product-details-section {
    padding-top: 0;
  }

  .top-nav {
    padding: 20px 30px;
  }

  .nav-left {
    left: 30px;
  }

  .inquire-btn {
    width: 100%;
  }
}