/* 上林美術館 - 藏品展示站 */
:root {
  --bg: #fafaf9;
  --card-bg: #fff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #2a9d8f;
  --accent-dark: #238276;
  --border: #e8e6e3;
  --header-bg: #1a1a1a;
  --header-text: #fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  position: relative;
}

/* Logo 陣列當背景（平鋪） */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("assets/logo.png");
  background-repeat: repeat;
  background-size: 120px 120px;
  opacity: 0.06;
  z-index: -1;
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- 共用頁首（含 Logo）---------- */
.site-header {
  background: var(--card-bg);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}

.site-header a {
  color: var(--text);
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  height: 24px;
  width: auto;
  display: block;
}

.logo-icon {
  height: 40px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--accent);
}

/* ---------- 首頁 ---------- */
.page-header {
  padding: 2rem 1rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
}

.page-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  padding: 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.gallery-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid var(--border);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.1);
  border-color: var(--accent);
}

.gallery-card .thumb-wrap {
  aspect-ratio: 3/4;
  background: var(--border);
  overflow: hidden;
}

.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.gallery-card .name {
  padding: 1.1rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.45;
  color: var(--text);
}

/* ---------- 詳細頁 ---------- */
.detail-bar {
  background: #2a9d8f;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.detail-bar a {
  color: #fff;
  font-size: 0.9rem;
}

.detail-bar .logo-icon {
  filter: brightness(0) invert(1);
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}

.detail-back:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.detail-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.detail-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 1.5rem 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent);
  color: var(--text);
}

.detail-gallery {
  margin-bottom: 2rem;
}

.detail-main-img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: var(--border);
  border-radius: 12px;
  margin-bottom: 0.75rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.detail-thumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.detail-thumbs img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s;
}

.detail-thumbs img:hover,
.detail-thumbs img.active {
  border-color: var(--accent);
}

.detail-description {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  border: 1px solid var(--border);
}

.detail-description p {
  margin: 0 0 0.75rem;
}

.detail-description p:last-child {
  margin-bottom: 0;
}

.detail-description br {
  display: block;
}

/* 頁尾 */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}

.site-footer .logo-footer {
  height: 36px;
  opacity: 0.85;
  margin-bottom: 0.5rem;
}

@media (min-width: 600px) {
  .logo-img {
    height: 28px;
  }
  .gallery {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    padding: 2rem 1.5rem;
  }
}