:root {
  --bg: #f4f5f5;
  --surface: #ffffff;
  --text: #202426;
  --muted: #687176;
  --line: #d9dddf;
  --accent: #536d78;
  --content: 760px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Microsoft JhengHei", sans-serif;
}

main {
  width: min(calc(100% - 32px), var(--content));
  margin: 0 auto;
  padding: 72px 0;
}

h1 {
  margin: 0 0 12px;
  font-size: 2rem;
  font-weight: 700;
}

.intro {
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.8;
}

.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 0 0 18px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.category-nav button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
}

.category-nav button:hover,
.category-nav button[aria-selected="true"] {
  color: var(--text);
  font-weight: 700;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

.section-title {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--muted);
  font-weight: 700;
}

.directory-placeholder {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.list {
  display: grid;
  gap: 12px;
}

.item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.item-title {
  margin-bottom: 6px;
  font-weight: 700;
}

.item-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.item-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 14px;
}

.item-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95rem;
}

.item-links a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  main {
    width: min(calc(100% - 24px), var(--content));
    padding: 40px 0;
  }

  h1 {
    font-size: 1.7rem;
  }

  .intro {
    margin-bottom: 22px;
  }

  .category-nav {
    gap: 8px 14px;
    margin-bottom: 24px;
  }

  .item {
    padding: 16px;
  }

  .item-links {
    gap: 10px 16px;
  }
}

.groups {
  display: grid;
  gap: 28px;
}

.subsection {
  display: grid;
  gap: 12px;
}

.subsection-title {
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
}


/* 慢慢看｜全域搜尋 */
.library-search {
  margin: 0 0 28px;
}

.search-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-weight: 700;
}

.search-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  border-radius: 0;
  outline: none;
}

.search-input:focus {
  border-color: var(--accent);
}

.search-status {
  min-height: 1.5em;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.search-results {
  display: grid;
  gap: 8px;
}

.search-result {
  display: grid;
  gap: 4px;
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.search-result:hover,
.search-result:focus-visible {
  border-color: var(--accent);
}

.search-result-title {
  font-weight: 700;
}

.search-result-path,
.search-result-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.search-target {
  animation: slowly-search-target 1.8s ease;
}

@keyframes slowly-search-target {
  0%, 100% { outline: 0 solid transparent; }
  20%, 65% { outline: 3px solid var(--accent); outline-offset: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  .search-target { animation: none; outline: 3px solid var(--accent); outline-offset: 3px; }
}

/* 子分類入口 */
.subpage-entry {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.subpage-entry:hover,
.subpage-entry:focus-visible {
  border-color: var(--accent);
}

.subpage-entry-title {
  font-weight: 700;
}

.subpage-entry-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.subpage-entry-meta {
  margin-top: 4px;
  color: var(--accent);
  font-size: 0.9rem;
}

/* 子頁 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.subpage-head {
  margin-bottom: 24px;
}

.subpage-head h1 {
  margin-bottom: 8px;
}

.subpage-count {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 600px) {
  .subpage-entry {
    padding: 16px;
  }
}



/* 空子分類 */
.subsection-empty {
  margin: 0;
  padding: 14px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* 完成品｜分頁 */
.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.pagination[hidden] {
  display: none;
}

.pagination-button {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.pagination-button:hover,
.pagination-button:focus-visible,
.pagination-button[aria-current="page"] {
  border-color: var(--accent);
  color: var(--text);
  font-weight: 700;
}

.pagination-button[aria-current="page"] {
  background: var(--bg);
}

/* 慢慢看｜API Explorer */
.api-explorer-panel {
  margin: -8px 0 28px;
}

.api-explorer-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.api-explorer-head .search-label {
  margin-bottom: 0;
}

.api-explorer-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.api-explorer-link:hover,
.api-explorer-link:focus-visible {
  text-decoration: underline;
}

.api-explorer-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.api-explorer-submit {
  padding: 12px 18px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--surface);
  font: inherit;
  cursor: pointer;
}

.api-explorer-submit:hover,
.api-explorer-submit:focus-visible {
  filter: brightness(0.94);
}

.api-explorer-result {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.api-explorer-frame {
  display: block;
  width: 100%;
  height: 72vh;
  min-height: 560px;
  border: 0;
  background: var(--surface);
}

@media (max-width: 600px) {
  .api-explorer-head {
    display: grid;
    gap: 4px;
  }

  .api-explorer-form {
    grid-template-columns: 1fr;
  }

  .api-explorer-submit {
    width: 100%;
  }

  .api-explorer-frame {
    height: 70vh;
    min-height: 520px;
  }
}