:root {
  --collection-bg-top: #8a5634;
  --collection-bg-bottom: #6a3f25;
  --collection-shell-top: #dcc18c;
  --collection-shell-bottom: #cfaf74;
  --collection-panel: #fff8ec;
  --collection-panel-soft: #f6ecd7;
  --collection-ink: #3f2417;
  --collection-ink-soft: #5b3725;
  --collection-line: rgba(92, 52, 28, 0.16);
  --collection-brown: #7a3f22;
  --collection-brown-dark: #5b2d19;
  --collection-green: #355347;
  --collection-green-dark: #274037;
  --collection-gold: #f7e2b6;
  --collection-gold-deep: #b9872f;
  --collection-shadow: 0 12px 24px rgba(54, 28, 14, 0.16);
  --collection-radius-xl: 24px;
  --collection-radius-lg: 18px;
  --collection-radius-md: 14px;
}

body {
  background: linear-gradient(180deg, var(--collection-bg-top) 0%, var(--collection-bg-bottom) 100%);
  color: var(--collection-ink);
}

.collection-page {
  max-width: 480px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px;
  background: linear-gradient(180deg, var(--collection-shell-top) 0%, var(--collection-shell-bottom) 100%);
  border-left: 3px solid #5d341f;
  border-right: 3px solid #5d341f;
  box-shadow: 0 0 0 2px rgba(255, 233, 186, 0.15) inset;
}

.collection-page .section {
  margin-bottom: 16px;
}

.collection-page .panel,
.collection-page .hero-card {
  background: linear-gradient(180deg, #efdcb6 0%, #e3c78f 100%);
  border: 2px solid var(--collection-line);
  box-shadow: var(--collection-shadow);
}

/* =========================
 Topbar
 ========================= */

.collection-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
}

.collection-back-link {
  color: var(--collection-brown-dark);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.collection-progress {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 248, 236, 0.86);
  border: 1px solid rgba(92, 52, 28, 0.1);
  white-space: nowrap;
}

.collection-progress-label {
  font-size: 13px;
  color: #6b432f;
}

#collectionProgressText {
  color: #3f2417;
  font-size: 15px;
}

/* =========================
 Hero
 ========================= */

.collection-hero {
  padding: 20px 18px;
  text-align: center;
}

.collection-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--collection-brown);
  color: var(--collection-gold);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 10px;
}

.collection-title {
  margin: 0 0 10px;
  color: #4a2416;
  font-size: 28px;
  line-height: 1.2;
  word-break: keep-all;
}

.collection-desc {
  margin: 0;
  color: #5a3422;
  font-size: 15px;
  line-height: 1.8;
}

/* =========================
 Summary
 ========================= */

.collection-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 14px;
}

.collection-summary-card {
  display: grid;
  gap: 8px;
  padding: 14px 12px;
  border-radius: 16px;
  background: rgba(255, 248, 236, 0.82);
  border: 1px solid rgba(92, 52, 28, 0.1);
  text-align: center;
}

.collection-summary-label {
  color: #6b432f;
  font-size: 13px;
  line-height: 1.5;
}

.collection-summary-value {
  color: #3f2417;
  font-size: 22px;
  line-height: 1.2;
}

/* =========================
 Filters
 ========================= */

.collection-filters {
  padding: 14px;
}

.collection-filter-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  overflow-x: auto;
}

.collection-filter-row::-webkit-scrollbar {
  display: none;
}

.collection-filter {
  flex: 0 0 auto;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(92, 52, 28, 0.12);
background: rgba(255, 248, 236, 0.88);
  color: #5a3422;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.collection-filter.is-active {
  background: linear-gradient(180deg, var(--collection-green) 0%, var(--collection-green-dark) 100%);
  color: var(--collection-gold);
  border-color: transparent;
}

/* =========================
 Shared panel head
 ========================= */

.collection-grid-panel,
.collection-detail-panel {
  padding: 16px;
}

.collection-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.collection-section-title {
  margin: 0;
  color: #4a2416;
  font-size: 20px;
  line-height: 1.3;
}

.collection-panel-note {
  color: #6b432f;
  font-size: 13px;
  line-height: 1.5;
  white-space: nowrap;
}

/* =========================
 Grid
 ========================= */

.collection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.collection-card {
  display: grid;
  gap: 12px;
  padding: 12px;
  border-radius: 18px;
  background: linear-gradient(180deg, #fff8ec 0%, #f3dfbb 100%);
  border: 1px solid rgba(92, 52, 28, 0.12);
  box-shadow: 0 8px 18px rgba(54, 28, 14, 0.08);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.collection-card:active {
  transform: scale(0.985);
}

.collection-card-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.collection-card-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  background:
    radial-gradient(circle at top, rgba(255,255,255,0.68) 0%, rgba(255,255,255,0.08) 40%, transparent 41%),
    linear-gradient(180deg, #f9efdc 0%, #ead0a0 100%);
  border: 1px solid rgba(92, 52, 28, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6a3f28;
  font-size: 16px;
  font-weight: 800;
  text-align: center;
  padding: 12px;
}

.collection-card-image.placeholder {
  color: rgba(74, 36, 22, 0.6);
}

.collection-card-body {
  display: grid;
  gap: 8px;
}

.collection-card-rarity {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  background: #7a3f22;
  color: #fffaf0;
  font-size: 12px;
  font-weight: 800;
}

.collection-card-name {
  margin: 0;
  color: #4a2416;
  font-size: 16px;
  line-height: 1.4;
}

.collection-card-text {
  margin: 0;
  color: #5a3422;
  font-size: 13px;
  line-height: 1.7;
}

.collection-card.is-locked {
  background: linear-gradient(180deg, #f0e5d3 0%, #ddc6a3 100%);
  opacity: 0.82;
}

.collection-card.is-locked .collection-card-image {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.18) 0%, rgba(0,0,0,0.04) 100%),
    linear-gradient(180deg, #b4a08a 0%, #957f69 100%);
  color: rgba(255, 248, 236, 0.84);
}

.collection-card.is-locked .collection-card-rarity {
  background: #7b6a5e;
}

.collection-card.is-locked .collection-card-name,
.collection-card.is-locked .collection-card-text {
  color: #6d5647;
}

/* =========================
 Detail
 ========================= */

.collection-detail {
  min-height: 220px;
  border-radius: 18px;
  background: linear-gradient(180deg, #fff8ec 0%, #f5e5c5 100%);
  border: 2px solid rgba(92, 52, 28, 0.12);
  padding: 18px;
}

.collection-detail-empty {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #6b432f;
  font-size: 15px;
  line-height: 1.8;
}

/* =========================
 Mobile
 ========================= */

@media (max-width: 900px) {
  .collection-page {
    padding: 12px 10px 24px;
  }

  .collection-title {
    font-size: 26px;
  }

  .collection-desc {
    font-size: 14px;
  }

  .collection-topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .collection-progress {
    width: 100%;
    justify-content: center;
  }

  .collection-summary {
    grid-template-columns: 1fr;
  }
.collection-panel-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .collection-panel-note {
    white-space: normal;
  }
}

/* =========================
 Tablet / Desktop
 ========================= */

@media (min-width: 768px) {
  .collection-page {
    max-width: 720px;
    padding: 20px;
  }

  .collection-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* =========================
  增修JS 新增了一些 detail / image class
• 讀取 GachaData
• 讀取 GachaStorage
• render 收藏進度
• render summary
• render 圖鑑格
• 支援篩選
• 點卡片顯示詳情
• 已解鎖 / 未解鎖分開顯示
 ========================= */
.collection-card-image-el,
.collection-detail-image-el {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.collection-card-image-el.is-silhouette,
.collection-detail-image-el.is-silhouette {
  filter: grayscale(1) brightness(0.75);
  opacity: 0.82;
}

.collection-empty {
  grid-column: 1 / -1;
  padding: 20px 16px;
  border-radius: 16px;
  background: rgba(255, 248, 236, 0.82);
  border: 1px solid rgba(92, 52, 28, 0.1);
  color: #6b432f;
  text-align: center;
  font-size: 14px;
  line-height: 1.8;
}

.collection-detail-card {
  display: grid;
  gap: 16px;
}

.collection-detail-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.collection-detail-image,
.collection-detail-image.placeholder {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  background:
    radial-gradient(circle at top, rgba(255,255,255,0.68) 0%, rgba(255,255,255,0.08) 40%, transparent 41%),
    linear-gradient(180deg, #f9efdc 0%, #ead0a0 100%);
  border: 1px solid rgba(92, 52, 28, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6a3f28;
  font-size: 18px;
  font-weight: 800;
  text-align: center;
  padding: 14px;
  overflow: hidden;
}

.collection-detail-content {
  display: grid;
  gap: 10px;
}
.collection-detail-rarity {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  color: #fffaf0;
  font-size: 12px;
  font-weight: 800;
}

.collection-detail-name {
  margin: 0;
  color: #4a2416;
  font-size: 24px;
  line-height: 1.25;
}

.collection-detail-title {
  margin: 0;
  color: #7a3f22;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.7;
}

.collection-detail-desc {
  margin: 0;
  color: #5a3422;
  font-size: 14px;
  line-height: 1.8;
}

.collection-detail-meta {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}

.collection-detail-meta-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 248, 236, 0.8);
  border: 1px solid rgba(92, 52, 28, 0.1);
  color: #5a3422;
  font-size: 14px;
}

.collection-detail-meta-item strong {
  color: #3f2417;
  font-size: 15px;
}

@media (min-width: 768px) {
  .collection-detail-card {
    grid-template-columns: 240px 1fr;
    align-items: start;
  }
}