/* ============================================================
   KRONOS ZHOU · 实用工具列表页样式（Cosmic 版）
   路径：tools/tool-list.css
   ------------------------------------------------------------
   设计方向：纯黑底 / 单色灰阶 + 冷蓝强调色（--accent-rgb）/
   大圆角卡片 + 胶囊标签，克制到「只有描边和一点点位移」。
   没有浅色模式，所有颜色都走 main-page.css 里的变量。

   ⚠️ 注意：所有卡片相关 class 用 tool-item-* 命名，
   避免和 main-page.css 里的 .tool-card（主页快捷功能卡片）冲突。
   ============================================================ */

/* ⚠️ 覆盖 main-page.css 里 .app-root 的 grid 布局 */
html body .app-root {
  display: flex !important;
  flex-direction: column !important;
  height: auto !important;
  min-height: 100vh;
  grid-template-rows: none !important;
}

/* ============================================================
   页面标题
============================================================ */
.page-hero {
  position: relative;
  margin: 1.6rem 0 2.4rem;
  padding: 2.6rem 2rem;
  border-radius: 1.75rem;
  border: 1px solid hsl(var(--stroke));
  background:
    radial-gradient(circle at 18% 24%, var(--accent-soft), transparent 55%),
    radial-gradient(circle at 82% 76%, rgba(137, 170, 204, 0.08), transparent 55%),
    hsl(var(--surface));
  overflow: hidden;
}

/* 标题区顶部那条渐变细线：Cosmic 版唯一的「装饰」 */
.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 2rem;
  right: 2rem;
  height: 2px;
  border-radius: 2px;
  background-image: linear-gradient(90deg, var(--grad-from), var(--grad-to), transparent);
  opacity: 0.7;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.05), transparent 42%);
  pointer-events: none;
}

.page-hero-title {
  position: relative;
  font-family: var(--font-body);
  font-size: clamp(2.1rem, 5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: hsl(var(--text));
  margin-bottom: 0.5rem;
}

.page-hero-subtitle {
  position: relative;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: hsl(var(--muted));
  text-transform: uppercase;
}

/* ============================================================
   过滤工具栏：搜索 + 标签 + 计数
   （与 shared/index-page.css 的 .index-toolbar 同构，
     页面自己的 class 名映射过去）
============================================================ */
.tool-toolbar,
.index-page .index-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

/* 搜索框 */
.tool-search-box,
.index-page .index-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 260px;
  min-width: 0;
  border-radius: 999px;
  border: 1px solid hsl(var(--stroke));
  background: var(--bg-block);
  transition: border-color 220ms ease, box-shadow 220ms ease;
}

.tool-search-box:focus-within,
.index-page .index-search:focus-within {
  border-color: rgba(var(--accent-rgb), 0.65);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.tool-search-icon,
.index-page .index-search-icon {
  padding: 0 0.35rem 0 1rem;
  font-size: 0.9rem;
  opacity: 0.7;
  flex: 0 0 auto;
}

.tool-search-input,
.index-page .index-search-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.75rem 0.5rem;
  border: 0;
  background: none;
  color: var(--text-primary);
  font: inherit;
  font-size: 0.9rem;
  outline: none;
}

.tool-search-input::placeholder,
.index-page .index-search-input::placeholder {
  color: var(--text-muted);
}

/* 把 type="search" 自带的那个叉去掉，用自己的 */
.tool-search-input::-webkit-search-cancel-button,
.index-page .index-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.tool-search-clear,
.index-page .index-search-clear {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  margin-right: 0.3rem;
  border-radius: 50%;
  border: 0;
  background: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease;
}

.tool-search-clear:hover,
.index-page .index-search-clear:hover {
  background: rgba(255, 255, 255, 0.07);
  color: hsl(var(--text));
}

/* 标签筛选 chip */
.tool-tag-filter,
.index-page .index-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tool-chip,
.index-page .index-chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  border: 1px solid hsl(var(--stroke));
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
  transition: color 200ms ease, border-color 200ms ease,
              background 200ms ease, transform 200ms ease;
}

.tool-chip:hover,
.index-page .index-chip:hover {
  color: hsl(var(--text));
  border-color: rgba(var(--accent-rgb), 0.5);
  transform: translateY(-1px);
}

/* 选中态：渐变底 + 近黑字（JS 用 .active，shared 那套用 .is-active） */
.tool-chip.active,
.tool-chip.is-active,
.index-page .index-chip.is-active {
  color: #0a0a0a;
  background-image: linear-gradient(90deg, var(--grad-from), var(--grad-to));
  border-color: transparent;
}

.tool-chip-count,
.index-page .index-chip-count {
  font-size: 0.75rem;
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

.tool-chip.active .tool-chip-count,
.tool-chip.is-active .tool-chip-count,
.index-page .index-chip.is-active .index-chip-count {
  opacity: 0.85;
}

.tool-count,
.index-page .index-count {
  margin-left: auto;
  font-size: 0.8125rem;
  color: hsl(var(--muted));
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ============================================================
   工具列表容器
============================================================ */
.tool-list-section {
  margin-bottom: 3rem;
}

.tool-list,
.index-page .index-grid {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

/* ============================================================
   工具条目（卡片）
============================================================ */
.tool-item {
  position: relative;
  background: hsl(var(--surface));
  border: 1px solid hsl(var(--stroke));
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 260ms cubic-bezier(0.2, 0.9, 0.4, 1),
              background 260ms ease,
              transform 260ms cubic-bezier(0.2, 0.9, 0.4, 1);
}

/* 划过时从卡片顶部透出的一团冷蓝柔光（很淡，只是氛围） */
.tool-item::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px 220px at 50% 0%, rgba(var(--accent-rgb), 0.14), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 260ms ease;
}

.tool-item:hover {
  border-color: rgba(var(--accent-rgb), 0.45);
  transform: translateY(-3px);
}

.tool-item:hover::after {
  opacity: 1;
}

.tool-item.expanded {
  border-color: rgba(var(--accent-rgb), 0.45);
  background: var(--bg-block-hover);
  transform: none;
}

.tool-item.expanded::after {
  opacity: 1;
}

/* ============================================================
   条目头部 —— 用 <button> 渲染
============================================================ */
.tool-item-header {
  appearance: none;
  -webkit-appearance: none;
  border: none;
  background: transparent;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  user-select: none;
  width: 100%;

  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.2rem;
  padding: 1.1rem 1.5rem;

  position: relative;
  z-index: 1;
  transition: background 260ms ease;
}

.tool-item-header:hover {
  background: rgba(255, 255, 255, 0.03);
}

.tool-item-header:focus-visible {
  outline: 2px solid var(--accent-solid-soft);
  outline-offset: -2px;
}

/* 图标 */
.tool-item-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid hsl(var(--stroke));
  background: var(--bg-elevated);
  font-size: 1.6rem;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform 260ms cubic-bezier(0.2, 0.9, 0.4, 1),
              background 260ms ease,
              border-color 260ms ease;
}

.tool-item-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tool-item-header:hover .tool-item-icon {
  transform: scale(1.05);
  background: var(--bg-block-hover);
  border-color: rgba(var(--accent-rgb), 0.45);
}

/* 标题 */
.tool-item-titles {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.tool-item-title-cn {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: hsl(var(--text));
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-item-title-en {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: hsl(var(--muted));
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 右侧标签 */
.tool-item-tags {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.tool-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ============================================================
   工具标签
   ------------------------------------------------------------
   文案由 tools-meta-data.json 的 tag 字段决定（有且只有一个），
   取值 → 样式类：sync_able → tag-sync-able / sync_unable → tag-sync-unable
                local_only → tag-local-only / database → tag-database
   配色都是「低调底色 + 同色描边」，不用发光。
   ============================================================ */
.tool-tag.tag-sync-able {
  background: var(--success-soft);
  color: var(--success);
  border-color: rgba(74, 222, 128, 0.28);
}

.tool-tag.tag-sync-unable {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.28);
}

.tool-tag.tag-local-only {
  background: var(--warn-soft);
  color: var(--warn);
  border-color: rgba(245, 158, 11, 0.28);
}

.tool-tag.tag-database {
  background: var(--accent-soft);
  color: var(--accent-solid-soft);
  border-color: rgba(var(--accent-rgb), 0.35);
}

.tool-tag.tag-unknown {
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px dashed var(--border-medium);
}

.tool-tag.tag-version {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border-color: var(--border-soft);
  font-variant-numeric: tabular-nums;
}

/* 数量角标（和 .tool-chip-count 配套用） */
.tool-tag.tag-count {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border-color: var(--border-soft);
  font-variant-numeric: tabular-nums;
}

.tool-item-arrow {
  font-size: 0.75rem;
  color: hsl(var(--muted));
  margin-left: 0.4rem;
  flex-shrink: 0;
  display: inline-block;
  transition: transform 280ms cubic-bezier(0.2, 0.9, 0.4, 1),
              color 260ms ease;
}

.tool-item.expanded .tool-item-arrow {
  transform: rotate(180deg);
  color: var(--accent-solid-soft);
}

.tool-item-header:hover .tool-item-arrow {
  color: var(--accent-solid-soft);
}

/* ============================================================
   条目展开区域
============================================================ */
.tool-item-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 420ms cubic-bezier(0.2, 0.9, 0.4, 1),
              opacity 260ms ease,
              padding 300ms ease;
  opacity: 0;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.tool-item.expanded .tool-item-body {
  max-height: 400px;
  opacity: 1;
  padding: 0 1.5rem 1.4rem;
}

/* 展开区顶部那条渐变细分隔线 */
.tool-item-body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 1.5rem;
  right: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, rgba(var(--accent-rgb), 0.5), transparent 70%);
  opacity: 0;
  transition: opacity 300ms ease 0.1s;
}

.tool-item.expanded .tool-item-body::before {
  opacity: 1;
}

.tool-item-desc {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 1rem 0 0.8rem;
  letter-spacing: 0.01em;
}

.tool-item-author {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  margin-bottom: 1.2rem;
}

.tool-item-author::before {
  content: '作者 · ';
  color: var(--text-muted);
  opacity: 0.7;
}

/* 进入按钮：白底黑字胶囊，hover 反过来 + 冷蓝描边（和 .btn-solid 同一套） */
.tool-item-enter {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: hsl(var(--text));
  color: hsl(var(--bg));
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 260ms ease, color 260ms ease,
              border-color 260ms ease,
              transform 260ms cubic-bezier(0.2, 0.9, 0.4, 1);
}

.tool-item-enter:hover {
  background: hsl(var(--bg));
  color: hsl(var(--text));
  border-color: rgba(var(--accent-rgb), 0.55);
  transform: translateY(-2px);
}

.tool-item-enter:active {
  transform: translateY(0) scale(0.97);
}

.tool-item-enter::after {
  content: '→';
  font-size: 1rem;
  transition: transform 260ms ease;
}

.tool-item-enter:hover::after {
  transform: translateX(4px);
}

/* ============================================================
   空状态
============================================================ */
.tool-list-empty,
.index-page .index-empty {
  text-align: center;
  color: hsl(var(--muted));
  font-size: 0.95rem;
  line-height: 1.8;
  padding: 3rem 1.25rem;
  background: hsl(var(--surface) / 0.25);
  border: 1px dashed hsl(var(--stroke));
  border-radius: 1.5rem;
}

/* ============================================================
   页脚推到最底部
============================================================ */
.site-footer {
  margin-top: auto;
}

/* ============================================================
   响应式
============================================================ */
@media (max-width: 900px) {
  .page-hero {
    padding: 2.25rem 1.4rem;
    border-radius: 1.5rem;
  }

  .page-hero::before {
    left: 1.4rem;
    right: 1.4rem;
  }

  .page-hero-title {
    font-size: 1.9rem;
  }

  .page-hero-subtitle {
    font-size: 0.72rem;
    letter-spacing: 0.24em;
  }

  .tool-toolbar,
  .index-page .index-toolbar {
    gap: 0.6rem;
  }

  .tool-count,
  .index-page .index-count {
    margin-left: 0;
    width: 100%;
  }

  .tool-item-header {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    gap: 0.8rem 1rem;
    padding: 1rem 1.2rem;
  }

  .tool-item-tags {
    grid-column: 1 / -1;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .tool-item-arrow {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
  }

  .tool-item-body::before {
    left: 1.2rem;
    right: 1.2rem;
  }

  .tool-item.expanded .tool-item-body {
    padding: 0 1.2rem 1.2rem;
  }
}

@media (max-width: 520px) {
  .tool-item-icon {
    width: 42px;
    height: 42px;
    font-size: 1.4rem;
  }

  .tool-item-title-cn {
    font-size: 0.98rem;
  }

  .tool-item-title-en {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
  }

  .tool-tag {
    font-size: 0.68rem;
    padding: 0.2rem 0.6rem;
  }

  .tool-item-enter {
    width: 100%;
    justify-content: center;
  }
}