@import url("https://fonts.googleapis.com/css2?family=Libre+Baskerville:wght@400;700&family=Inter:wght@300;400;500&display=swap");

:root {
  --color-bg: #f8f9fc;
  --color-surface: #eceef5;
  --color-text: #0d1b2a;
  --color-muted: #5a6a7a;
  --color-accent: #1a4480;
  --color-accent-gold: #c8922a;
  --color-accent-lt: #d6e3f5;
  --color-border: rgba(13, 27, 42, 0.1);
  --font-display: "Libre Baskerville", serif;
  --font-body: "Inter", sans-serif;
}

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2.5rem;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-nav .logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.01em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.nav-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.site-header {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 4rem 2rem 3rem;
  border-bottom: 1px solid var(--color-border);
  background-image: url("img/Brooklyn\ Bridge.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.header-content {
  position: relative;
  z-index: 2;
}

.site-header h1 {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  color: #f8f9fc;
  margin-bottom: 0.6rem;
}

.site-header .tagline {
  font-size: 1rem;
  font-weight: 300;
  color: var(--color-accent-lt);
  letter-spacing: 0.02em;
}

.header-waves {
  position: absolute;
  right: -60px;
  top: 50%;
  transform: translateY(-50%);
  width: 480px;
  height: auto;
  z-index: 1;
  pointer-events: none;
}

.product-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(13, 27, 42, 0.12);
}

.card-image {
  width: 100%;
  height: 180px;
  object-fit: contain;
  background-color: #1a4480;
  padding: 1rem;
}

.card-body {
  padding: 1.2rem 1.4rem 1.4rem;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.card-author {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.9rem;
}

.card-link {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  border-bottom: 1.5px solid var(--color-accent-gold);
  padding-bottom: 1px;
}

.card-link:hover {
  text-decoration: none;
  opacity: 0.75;
}

.site-footer {
  text-align: center;
  padding: 1.8rem 2rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-accent);
  font-size: 0.85rem;
  color: var(--color-accent-lt);
  font-weight: 300;
}

.detail-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
}

.detail-back {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
  letter-spacing: 0.03em;
}

.detail-back:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.detail-layout {
  display: flex;
  gap: 3rem;
  align-items: flex-start;
}

.detail-cover {
  flex-shrink: 0;
  width: 240px;
  border-radius: 4px;
  box-shadow: 4px 6px 20px rgba(13, 27, 42, 0.15);
}

.detail-info h1 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.detail-info .detail-author {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-accent-gold);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.detail-info p {
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.detail-meta {
  margin-top: 1.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 2.5rem;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.meta-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.meta-value {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-header h1 {
    font-size: 2rem;
  }

  .detail-layout {
    flex-direction: column;
  }

  .detail-cover {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .site-nav {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .site-header h1 {
    font-size: 1.6rem;
  }

  .site-header .tagline {
    font-size: 0.9rem;
  }

  .detail-meta {
    flex-direction: column;
    gap: 1rem;
  }
}