*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --c-bg: #ffffff; --c-bg-alt: #f9faf9; --c-bg-dark: #1a1a1a;
  --c-text: #111111; --c-text-secondary: #555555; --c-text-muted: #999999;
  --c-accent: #ffcad4; --c-accent-hover: #ffb6c1; --c-sub: #d8e2dc;
  --c-border: #e8e8e8;
  --font-display: 'Pretendard Variable', 'Pretendard', -apple-system, sans-serif;
  --font-body: 'Pretendard Variable', 'Pretendard', -apple-system, sans-serif;
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --s-container: clamp(20px, 5vw, 80px);
}
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); color: var(--c-text); background: var(--c-bg); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* Progress bar */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--c-accent); z-index: 9999; transition: width 0.1s linear;
}

/* Back nav */
.detail-nav {
  position: fixed; top: 0; left: 0; width: 100%; height: 60px;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(16px);
  z-index: 1000; display: flex; align-items: center;
  border-bottom: 1px solid var(--c-border);
}
.detail-nav-inner {
  max-width: 960px; margin: 0 auto; width: 100%; padding: 0 var(--s-container);
  display: flex; align-items: center; justify-content: space-between;
}
.detail-back {
  font-size: 0.78rem; font-weight: 400; letter-spacing: 0.1em;
  color: var(--c-text-secondary); display: flex; align-items: center; gap: 8px;
  transition: color 0.3s ease;
}
.detail-back:hover { color: var(--c-text); }
.detail-logo {
  font-family: var(--font-display); font-size: 1.1rem; letter-spacing: 0.2em;
  color: var(--c-text); font-weight: 400;
}

/* Hero header */
.detail-hero {
  padding: 120px var(--s-container) 48px;
  max-width: 960px; margin: 0 auto; text-align: center;
}
.detail-meta { display: flex; align-items: center; justify-content: center; gap: 16px; margin-bottom: 20px; }
.detail-category {
  font-size: 0.65rem; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--c-accent); background: rgba(255,202,212,0.15);
  padding: 4px 12px;
}
.detail-date { font-size: 0.78rem; color: var(--c-text-muted); }
.detail-title {
  font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300; line-height: 1.3; margin-bottom: 16px;
}
.detail-desc { font-size: 0.95rem; color: var(--c-text-secondary); max-width: 600px; margin: 0 auto; line-height: 1.8; }

/* Gallery */
.detail-gallery {
  max-width: 960px; margin: 40px auto 80px; padding: 0 var(--s-container);
  display: flex; flex-direction: column; gap: 12px;
}
.detail-gallery img {
  width: 100%; display: block; object-fit: cover;
  background: linear-gradient(135deg, var(--c-sub) 0%, #c8d8d0 100%);
}

/* Share */
.detail-share {
  max-width: 720px; margin: 0 auto 48px; padding: 0 var(--s-container);
  display: flex; align-items: center; gap: 12px;
  padding-top: 24px; border-top: 1px solid var(--c-border);
}
.detail-share span { font-size: 0.72rem; letter-spacing: 0.1em; color: var(--c-text-muted); text-transform: uppercase; }
.share-btn {
  width: 36px; height: 36px; border: 1px solid var(--c-border);
  background: none; color: var(--c-text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; transition: all 0.3s ease;
}
.share-btn:hover { background: var(--c-text); border-color: var(--c-text); color: #fff; }

/* Navigation */
.detail-nav-bottom {
  max-width: 720px; margin: 0 auto 80px; padding: 0 var(--s-container);
  display: flex; justify-content: space-between; align-items: center;
}
.detail-nav-btn {
  font-size: 0.78rem; letter-spacing: 0.1em; color: var(--c-text-secondary);
  display: flex; align-items: center; gap: 8px; transition: color 0.3s ease;
}
.detail-nav-btn:hover { color: var(--c-text); }
.detail-back-list {
  font-size: 0.78rem; padding: 10px 28px; border: 1px solid var(--c-border);
  color: var(--c-text-secondary); transition: all 0.3s ease;
}
.detail-back-list:hover { background: var(--c-text); border-color: var(--c-text); color: #fff; }

/* Related */
.detail-related {
  background: var(--c-bg-alt); padding: 80px 0;
}
.detail-related-inner { max-width: 960px; margin: 0 auto; padding: 0 var(--s-container); }
.detail-related h3 {
  font-family: var(--font-display); font-size: 1.6rem; font-weight: 300;
  text-align: center; margin-bottom: 40px;
}
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-item {
  position: relative; overflow: hidden; aspect-ratio: 1;
  background: var(--c-sub); cursor: pointer;
}
.related-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease-smooth); }
.related-item:hover img { transform: scale(1.06); }
.related-item-overlay {
  position: absolute; bottom: 0; left: 0; width: 100%; padding: 24px 16px;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.7) 100%);
}
.related-item-category {
  font-size: 0.6rem; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--c-accent); display: block; margin-bottom: 4px;
}
.related-item-title { font-family: var(--font-display); font-size: 1rem; color: #fff; font-weight: 400; }
.related-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--c-sub) 0%, #c8d8d0 100%);
  display: flex; align-items: center; justify-content: center;
}
.related-placeholder span { font-family: var(--font-display); font-size: 0.75rem; letter-spacing: 0.2em; color: rgba(0,0,0,0.12); }

/* Footer */
.footer {
  background: var(--c-bg-dark); padding: 36px 0;
  text-align: center;
}
.footer-copy { font-size: 0.7rem; color: rgba(255,255,255,0.2); letter-spacing: 0.05em; }

@media (max-width: 768px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-nav-bottom { flex-direction: column; gap: 16px; align-items: stretch; text-align: center; }
  .detail-nav-btn { justify-content: center; }
}
@media (max-width: 480px) {
  .related-grid { grid-template-columns: 1fr; }
}