/* ============================================================
   KRONOS ZHOU · CSS 样式表库 · 页面样式
   路径：knowledgelibrary/css-styles/css-styles.css
   ------------------------------------------------------------
   class 前缀统一 cssl-（CSS Library），不与模板里的 class 冲突：
     · 页面自己的东西：cssl-card / cssl-preview / cssl-gen / …
     · 模板预览里的东西：全部关在 Shadow DOM 里，这里的样式完全进不去
   配色沿用 main-page.css 的变量，与另两个库页面保持同一套视觉。
   ============================================================ */

/* ============================================================
   [hidden] 兜底（重要，别删）
   ------------------------------------------------------------
   浏览器默认的 [hidden] { display: none } 权重极低，
   下面任何一条带 display 的规则都能盖掉它（另两个库都踩过这个坑），
   而分区面板 / 生成器面板都靠 hidden 切换，所以这条必须留着。
   ============================================================ */
[hidden] {
  display: none !important;
}

/* ============================================================
   一、页面标题区
   ------------------------------------------------------------
   ⚠️ main-page.css 里**没有** .page-hero 这一套（另两个库是各自写的），
   所以这一套必须本页自带，否则标题就退化成裸 h1 + 裸 p。
   下面的排版与 chemistry.css / app-redirect.css 逐条对齐，
   只把配色换成这个库的主色（蓝 + 紫）。
   ============================================================ */
.page-hero {
  margin: 1.6rem 0 1.2rem;
  padding: 2.4rem 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  box-shadow: var(--shadow-block);
  position: relative;
  overflow: hidden;
}

/* 本库专属的两团光晕（另两个库用绿 / 青，这里用蓝 + 紫） */
.cssl-hero {
  background:
    radial-gradient(circle at 18% 28%, rgba(91, 141, 239, 0.18), transparent 55%),
    radial-gradient(circle at 82% 72%, rgba(164, 107, 255, 0.15), transparent 55%),
    var(--bg-block);
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.04), transparent 40%);
  pointer-events: none;
}

.page-hero-title {
  font-family: 'Bahnschrift', 'Segoe UI Variable', 'Segoe UI', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: linear-gradient(120deg, var(--text-primary) 20%, #a46bff 120%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px var(--accent-glow);
  margin-bottom: 0.4rem;
}

.page-hero-subtitle {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.cssl-hero-desc {
  margin-top: 1rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 54rem;
}

.cssl-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.1rem;
}

.cssl-hero-tag {
  display: inline-block;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-medium);
  background: var(--accent-soft);
  color: var(--text-secondary);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   二、分区面板 / 分区与模块标签页（共用一套）
   ============================================================ */
.cssl-panel {
  animation: cssl-panel-in 0.28s cubic-bezier(0.2, 0.9, 0.4, 1);
}

@keyframes cssl-panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .cssl-panel { animation: none; }
}

.cssl-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
}

/* 生成器的四个入口：单独一条，下面接工作区 */
.cssl-gen-tabs {
  margin-bottom: 1rem;
}

/* 生成器工作区：里面是「控制项 + 输出」那两栏（见 .cssl-gen） */
.cssl-gen-work {
  display: block;
}

/* 网格外层：只负责给网格与空状态留位置（网格自己带 gap） */
.cssl-grid-wrap {
  display: block;
}

.cssl-tab {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), transform var(--transition);
}

.cssl-tab:hover {
  background: var(--bg-block-hover);
  border-color: var(--border-medium);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.cssl-tab:active {
  transform: translateY(0) scale(0.99);
}

.cssl-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-tab.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 8px 20px -12px var(--accent-glow);
}

.cssl-tab-count {
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  padding: 0.05rem 0.4rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: inherit;
}

.cssl-tab:not(.is-active) .cssl-tab-count {
  background: rgba(255, 255, 255, 0.06);
}

/* 分区标签更大一些，因为它管整块内容 */
.cssl-section-tabs .cssl-tab {
  padding: 0.72rem 1.35rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.cssl-tab-icon {
  font-size: 1.05rem;
  line-height: 1;
}

/* ============================================================
   三、工具栏：搜索 + 模块 chips + 计数
   ============================================================ */
.cssl-toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  margin-bottom: 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--bg-panel);
  box-shadow: var(--shadow-block);
}

.cssl-search {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cssl-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.cssl-search-icon {
  font-size: 0.95rem;
  opacity: 0.75;
}

.cssl-search-input {
  flex: 1;
  min-width: 0;
  padding: 0.7rem 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-primary);
  font: inherit;
  font-size: 0.92rem;
}

.cssl-search-input::placeholder {
  color: var(--text-muted);
}

.cssl-search-clear {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0.2rem 0.3rem;
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}

.cssl-search-clear:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.cssl-search-clear:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cssl-chips {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* 一组模块（37 个模块按五类 + 常用样式分开显示，不然一行铺不下） */
.cssl-chip-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cssl-chip-group-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.cssl-chip-group-icon {
  font-size: 0.85rem;
}

.cssl-chip-group-count {
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
  padding: 0.05rem 0.4rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  color: var(--text-muted);
}

.cssl-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.cssl-chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.cssl-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-block-hover);
}

.cssl-chip:active {
  transform: scale(0.98);
}

.cssl-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-chip.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.cssl-chip-count {
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  padding: 0.05rem 0.36rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}

.cssl-toolbar-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.cssl-reset {
  appearance: none;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--border-medium);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}

.cssl-reset:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.cssl-reset:active {
  transform: translateY(1px);
}

.cssl-reset:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-count {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ============================================================
   四、模板卡片网格
   ============================================================ */
.cssl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1rem;
}

.cssl-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  box-shadow: var(--shadow-block);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.cssl-card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-hover);
}

.cssl-card-head {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.95rem 1rem 0.75rem;
}

.cssl-card-titles {
  flex: 1;
  min-width: 0;
}

.cssl-card-title {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}

.cssl-card-title-en {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cssl-card-id {
  flex: 0 0 auto;
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.68rem;
  color: var(--text-muted);
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  border: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.03);
}

.cssl-card-desc {
  padding: 0 1rem 0.85rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.cssl-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0 1rem 0.85rem;
}

.cssl-tag {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  padding: 0.16rem 0.5rem;
  border-radius: 999px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-soft);
}

/* ---------- 预览区 ---------- */
.cssl-preview {
  margin: 0 1rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-medium);
  /* 预览底用浅色棋盘：浅色模板（白底卡片）也看得清边界 */
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.035) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.035) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.035) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.035) 75%),
    #f7f9fc;
  background-size: 18px 18px, 18px 18px, auto;
  background-position: 0 0, 9px 9px, 0 0;
  min-height: 100px;
  overflow: hidden;
}

/* 隔离用的模板：它本身不该出现在布局里（内容会克隆进 shadow root） */
.cssl-tpl {
  display: none;
}

.cssl-preview-host {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 16px;
  min-height: 100px;
  font-family: 'Segoe UI', 'PingFang SC', system-ui, sans-serif;
  color: #1d2530;
}

/* 预览底注：提醒这里的 hover / active / Tab 都是真的 */
.cssl-preview-note {
  padding: 0 1rem 0.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  color: var(--text-muted);
}

/* ---------- 代码区 ---------- */
.cssl-code {
  border-top: 1px solid var(--border-soft);
  background: rgba(8, 11, 16, 0.5);
}

.cssl-code-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.7rem;
}

.cssl-code-tab {
  appearance: none;
  padding: 0.32rem 0.7rem;
  border-radius: 7px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.74rem;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.cssl-code-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.cssl-code-tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cssl-code-tab.is-active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-soft);
}

.cssl-code-spacer {
  flex: 1;
}

.cssl-copy {
  appearance: none;
  padding: 0.34rem 0.8rem;
  border-radius: 7px;
  border: 1px solid var(--border-medium);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.74rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.cssl-copy:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}

.cssl-copy:active {
  transform: translateY(1px);
}

.cssl-copy:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-copy.is-done {
  color: var(--success);
  border-color: var(--success);
  background: var(--success-soft);
}

.cssl-code-body {
  margin: 0;
  padding: 0 0.9rem 0.9rem;
  max-height: 190px;
  overflow: auto;
  font-family: 'Cascadia Mono', 'Consolas', 'SFMono-Regular', monospace;
  font-size: 0.72rem;
  line-height: 1.65;
  color: #b9c6da;
  white-space: pre;
  tab-size: 2;
}

.cssl-code-body::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.cssl-code-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 8px;
}

/* ---------- 帮助提示 ---------- */
.cssl-card-help {
  margin: 0 1rem 1rem;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: rgba(91, 141, 239, 0.06);
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.cssl-card-help li + li {
  margin-top: 0.2rem;
}

.cssl-card-help ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.cssl-card-help li::before {
  content: '·';
  color: var(--accent);
  font-weight: 700;
  margin-right: 0.4rem;
}

.cssl-empty {
  padding: 3rem 1rem;
  text-align: center;
  font-size: 0.92rem;
  font-style: italic;
  color: var(--text-muted);
  border: 1px dashed var(--border-soft);
  border-radius: var(--radius-md);
  background: var(--bg-block);
}

/* ============================================================
   五、生成器：控制项 + 实时预览
   ============================================================ */
.cssl-gen {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.cssl-gen-controls,
.cssl-gen-output {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  box-shadow: var(--shadow-block);
}

.cssl-gen-controls {
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cssl-gen-output {
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.cssl-gen-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border-soft);
}

.cssl-gen-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
}

.cssl-gen-sub {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.cssl-gen-desc {
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.cssl-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cssl-field-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.cssl-field-value {
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.76rem;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.cssl-field-hint {
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.cssl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.cssl-input,
.cssl-select,
.cssl-textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 9px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font: inherit;
  font-size: 0.84rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cssl-input:hover,
.cssl-select:hover,
.cssl-textarea:hover {
  border-color: var(--border-medium);
}

.cssl-input:focus,
.cssl-select:focus,
.cssl-textarea:focus {
  outline: 0;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.cssl-input:disabled,
.cssl-select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.cssl-input[type="number"] {
  font-variant-numeric: tabular-nums;
}

.cssl-color {
  width: 46px;
  height: 34px;
  padding: 2px;
  border-radius: 9px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
  cursor: pointer;
}

.cssl-color::-webkit-color-swatch-wrapper {
  padding: 0;
}

.cssl-color::-webkit-color-swatch {
  border: 0;
  border-radius: 6px;
}

.cssl-range {
  width: 100%;
  appearance: none;
  height: 22px;
  background: transparent;
  cursor: pointer;
}

.cssl-range::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), rgba(255, 255, 255, 0.12));
}

.cssl-range::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -5px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.cssl-range:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.cssl-seg {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
}

.cssl-seg-btn {
  appearance: none;
  padding: 0.4rem 0.7rem;
  border-radius: 7px;
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.cssl-seg-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.07);
}

.cssl-seg-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cssl-seg-btn.is-active {
  color: #fff;
  background: var(--accent);
}

.cssl-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cssl-btn {
  appearance: none;
  padding: 0.5rem 0.95rem;
  border-radius: 9px;
  border: 1px solid var(--border-medium);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.cssl-btn:hover {
  border-color: var(--accent);
  background: var(--bg-block-hover);
}

.cssl-btn:active {
  transform: translateY(1px);
}

.cssl-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.cssl-btn-primary:hover {
  background: #4a7de0;
  border-color: #4a7de0;
}

/* ---------- 生成器预览舞台 ---------- */
.cssl-stage {
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-medium);
  background: #f7f9fc;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  overflow: hidden;
}

.cssl-stage-dark {
  background: #12161f;
  border-color: rgba(255, 255, 255, 0.16);
}

.cssl-stage-checker {
  background:
    linear-gradient(45deg, #e6eaf2 25%, transparent 25%, transparent 75%, #e6eaf2 75%),
    linear-gradient(45deg, #e6eaf2 25%, transparent 25%, transparent 75%, #e6eaf2 75%),
    #fff;
  background-size: 16px 16px, 16px 16px, auto;
  background-position: 0 0, 8px 8px, 0 0;
}

.cssl-grad-box {
  width: min(320px, 100%);
  height: 150px;
  border-radius: 14px;
  box-shadow: 0 10px 26px -14px rgba(0, 0, 0, 0.6);
}

.cssl-grad-text {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-family: 'Segoe UI', 'PingFang SC', system-ui, sans-serif;
  text-align: center;
}

.cssl-grad-btn {
  padding: 12px 26px;
  border-radius: 12px;
  border: 0;
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, filter 160ms ease;
}

.cssl-grad-btn:hover {
  filter: brightness(1.08);
}

.cssl-grad-btn:active {
  transform: translateY(1px) scale(0.99);
}

/* 动画生成器的预览方块：所有参数都走行内 style 与 Web Animations API，
   这里只定尺寸与外观，避免调参时反复改页面样式 */
.cssl-anim-demo {
  width: 120px;
  height: 120px;
  border-radius: 20px;
  background-image: linear-gradient(135deg, #5b8def, #a46bff);
  box-shadow: 0 16px 34px -18px rgba(91, 141, 239, 1);
}

/* ---------- 色标编辑器 ---------- */
.cssl-stops {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cssl-stop {
  display: grid;
  grid-template-columns: 40px 1fr 64px 30px;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
}

.cssl-stop.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.cssl-stop-del {
  appearance: none;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.cssl-stop-del:hover {
  color: var(--danger);
  border-color: var(--danger);
}

.cssl-stop-del:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cssl-stop-pos {
  width: 100%;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
  color: var(--text-primary);
  font: inherit;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

/* ---------- 颜色输出 ---------- */
.cssl-color-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.cssl-color-swatch {
  width: 76px;
  height: 76px;
  flex: 0 0 auto;
  border-radius: 14px;
  border: 1px solid var(--border-medium);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.cssl-fmt {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.5rem;
}

.cssl-fmt-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.6rem;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
  min-width: 0;
}

.cssl-fmt-name {
  flex: 0 0 auto;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  min-width: 62px;
  white-space: nowrap;
}

.cssl-fmt-value {
  flex: 1;
  min-width: 0;
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.76rem;
  color: var(--text-primary);
  /* 一行放不下就自己横向滚，别把整格撑成三行高 */
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}

.cssl-fmt-value::-webkit-scrollbar {
  height: 4px;
}

.cssl-fmt-value::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.16);
  border-radius: 4px;
}

.cssl-scale {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 4px;
}

.cssl-scale-cell {
  appearance: none;
  border: 0;
  border-radius: 8px;
  height: 54px;
  cursor: pointer;
  color: #fff;
  font: inherit;
  font-size: 0.62rem;
  font-weight: 700;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 4px;
  border: 1px solid rgba(0, 0, 0, 0.18);
  transition: transform var(--transition);
}

.cssl-scale-cell:hover {
  transform: translateY(-2px);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cssl-scale-cell:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.cssl-schemes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.5rem;
}

.cssl-scheme {
  padding: 0.55rem 0.6rem;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
}

.cssl-scheme-name {
  font-size: 0.74rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.cssl-scheme-row {
  display: flex;
  gap: 4px;
}

.cssl-scheme-swatch {
  flex: 1;
  height: 30px;
  border-radius: 7px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform var(--transition);
}

.cssl-scheme-swatch:hover {
  transform: translateY(-2px);
}

/* ---------- 对比度 ---------- */
.cssl-contrast {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cssl-contrast-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.7rem 0.8rem;
  border-radius: 10px;
  font-size: 0.82rem;
  border: 1px solid var(--border-soft);
}

.cssl-contrast-ratio {
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-variant-numeric: tabular-nums;
}

.cssl-badge {
  font-size: 0.68rem;
  padding: 0.14rem 0.45rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space: nowrap;
}

.cssl-badge-pass {
  color: var(--success);
}

.cssl-badge-fail {
  color: var(--danger);
}

/* ---------- 尺寸预览器 ---------- */
.cssl-size-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem;
}

.cssl-size-cell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.6rem 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: var(--bg-elevated);
}

.cssl-size-unit {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.cssl-size-value {
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  color: var(--text-primary);
}

.cssl-ruler-wrap {
  position: relative;
  width: 100%;
  overflow: auto;
  padding: 8px 0;
}

.cssl-ruler {
  position: relative;
  height: 26px;
  min-width: 100%;
  background-image: repeating-linear-gradient(to right,
    rgba(29, 37, 48, 0.35) 0 1px, transparent 1px 10px);
  border-bottom: 1px solid rgba(29, 37, 48, 0.35);
}

.cssl-size-box-demo {
  border: 2px solid #5b8def;
  background: rgba(91, 141, 239, 0.14);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #1d2530;
  font-family: 'Segoe UI', 'PingFang SC', system-ui, sans-serif;
}

.cssl-text-sample {
  font-family: 'Segoe UI', 'PingFang SC', system-ui, sans-serif;
  color: #1d2530;
  text-align: center;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.cssl-scale-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cssl-scale-row {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-soft);
}

.cssl-scale-label {
  flex: 0 0 62px;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: 'Cascadia Mono', 'Consolas', monospace;
}

.cssl-scale-sample {
  flex: 1;
  min-width: 0;
  color: var(--text-primary);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.cssl-scale-css {
  flex: 0 0 auto;
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.7rem;
  color: var(--accent);
}

.cssl-sub-title {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ============================================================
   六、提示条
   ============================================================ */
.cssl-toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%) translateY(8px);
  z-index: 2147483000;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-size: 0.82rem;
  color: #fff;
  background: rgba(28, 34, 46, 0.96);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-panel);
  opacity: 0;
  transition: opacity 0.22s ease, transform 0.22s ease;
  pointer-events: none;
}

.cssl-toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.cssl-toast.is-warn {
  color: #ffd9d9;
  border-color: rgba(239, 68, 68, 0.5);
}

/* ============================================================
   七、说明区
   ============================================================ */
.cssl-note {
  margin-top: 2rem;
  padding: 1.3rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--bg-block);
}

.cssl-note-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.7rem;
}

.cssl-note-text {
  font-size: 0.84rem;
  line-height: 1.9;
  color: var(--text-secondary);
}

.cssl-note-text + .cssl-note-text {
  margin-top: 0.6rem;
}

.cssl-note-text code {
  font-family: 'Cascadia Mono', 'Consolas', monospace;
  font-size: 0.8em;
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--accent);
}

.cssl-note-text strong {
  color: var(--text-primary);
}

/* ============================================================
   八、响应式
   ============================================================ */
@media (max-width: 1100px) {
  .cssl-gen {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .page-hero {
    padding: 1.8rem 1.4rem;
  }

  .page-hero-title {
    font-size: 1.8rem;
  }

  .page-hero-subtitle {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
  }

  .cssl-grid {
    grid-template-columns: 1fr;
  }

  .cssl-scale {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .cssl-stop {
    grid-template-columns: 36px 1fr 58px 28px;
  }
}

@media (max-width: 640px) {
  .cssl-hero-desc {
    font-size: 0.86rem;
  }

  .cssl-toolbar {
    padding: 0.85rem;
  }

  .cssl-section-tabs .cssl-tab {
    flex: 1 1 auto;
    justify-content: center;
  }

  .cssl-fmt {
    grid-template-columns: 1fr;
  }
}