/* ============ 全局主题（默认暗色） ============ */
:root,
[data-theme="dark"] {
  --bg: #0f1220;
  --bg-2: #171a2e;
  --surface: #1e2140;
  --surface-hover: #262a4d;
  --border: #2d3157;
  --text: #e8ebf7;
  --text-dim: #9099b8;
  --accent: #7c8cff;
  --accent-2: #b47cff;
  --success: #4ade80;
  --danger: #f87171;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --mask-color: rgba(0, 0, 0, 0.55);
  --card-hover-shadow: 0 8px 32px rgba(124, 140, 255, 0.15);
  --radius: 12px;
  --sidebar-w: 260px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

[data-theme="light"] {
  --bg: #f6f8fc;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-hover: #eef1f9;
  --border: #e2e6f0;
  --text: #1a1f36;
  --text-dim: #6b7590;
  --accent: #5865ff;
  --accent-2: #a855f7;
  --success: #22c55e;
  --danger: #ef4444;
  --shadow: 0 6px 20px rgba(88, 101, 255, 0.10);
  --mask-color: rgba(20, 26, 54, 0.35);
  --card-hover-shadow: 0 8px 28px rgba(88, 101, 255, 0.18);
}

/* 全局过渡，切换主题时平滑 */
html {
  transition: background-color 0.25s ease, color 0.25s ease;
}
body,
.sidebar,
.tool-card,
.tool-panel,
.field input,
.field textarea,
.field select,
.btn,
.back-btn,
.menu-btn,
.result,
.nav-item,
.drop-zone,
.info-list li,
.close-drawer,
.theme-toggle,
.footer-info code,
.tool-card .tool-tag,
.nav-item .count,
.tag {
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
}

.hidden { display: none !important; }

button, input, select, textarea { font-family: inherit; }

/* ============ 抽屉遮罩（仅移动端显示） ============ */
.drawer-mask {
  position: fixed;
  inset: 0;
  background: var(--mask-color);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
  backdrop-filter: blur(2px);
}
.drawer-mask.show {
  opacity: 1;
  pointer-events: auto;
}

/* ============ 侧边栏 ============ */
.sidebar {
  width: var(--sidebar-w);
  height: 100vh;
  height: 100dvh;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: calc(20px + var(--safe-top)) 16px calc(12px + var(--safe-bottom));
  flex-shrink: 0;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 6px 16px;
  position: relative;
}
.brand .logo {
  font-size: 32px;
  filter: drop-shadow(0 0 10px rgba(124, 140, 255, 0.5));
}
.brand h1 {
  font-size: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.brand p {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}
.close-drawer {
  display: none;
  position: absolute;
  right: 4px;
  top: 4px;
  width: 36px;
  height: 36px;
  border: none;
  background: var(--surface);
  color: var(--text);
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
}

.search input {
  width: 100%;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  appearance: none;
}
.search input:focus {
  border-color: var(--accent);
}

.nav {
  flex: 1;
  margin-top: 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.nav::-webkit-scrollbar { width: 6px; }
.nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 12px;
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  margin-bottom: 4px;
  transition: background 0.15s, color 0.15s;
  user-select: none;
  min-height: 44px;
}
.nav-item:hover, .nav-item:active {
  background: var(--surface);
  color: var(--text);
}
.nav-item.active {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 15%, transparent), color-mix(in srgb, var(--accent-2) 15%, transparent));
  color: var(--accent);
  border-left: 3px solid var(--accent);
  padding-left: 9px;
}
.nav-item .icon { font-size: 16px; }
.nav-item .count {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-dim);
  background: var(--surface);
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 24px;
  text-align: center;
}

.footer-info {
  padding: 12px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
}
.footer-info .hint { margin-top: 4px; opacity: 0.7; }
.footer-info code {
  background: var(--surface);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 10px;
}

/* ============ 主内容 ============ */
.main {
  flex: 1;
  height: 100vh;
  height: 100dvh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: calc(20px + var(--safe-top)) 32px calc(24px + var(--safe-bottom));
  min-width: 0;
  /* flex 列 + footer margin-top:auto → sticky footer：内容少贴底、内容多跟到末尾 */
  display: flex;
  flex-direction: column;
}
/* 关键：所有直接子元素都不允许被 flex 压缩，避免 tool-list 里的 grid 被挤没 */
.main > * { flex-shrink: 0; }
.main::-webkit-scrollbar { width: 8px; }
.main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.topbar-info { flex: 1; min-width: 0; }
.topbar h2 {
  font-size: 22px;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.topbar p {
  color: var(--text-dim);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
}
.back-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
  min-height: 40px;
  flex-shrink: 0;
}
.back-btn:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

/* 主题切换按钮 */
.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s;
  position: absolute;
}
[data-theme="dark"] .theme-toggle .icon-sun,
:root:not([data-theme="light"]) .theme-toggle .icon-sun {
  transform: translateY(30px) rotate(90deg);
  opacity: 0;
}
[data-theme="light"] .theme-toggle .icon-moon {
  transform: translateY(-30px) rotate(-90deg);
  opacity: 0;
}

/* ============ 工具卡片网格 ============ */
.tool-list-wrap { min-height: 100px; }

/* 二级分类芯片栏 */
.sub-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}
.sub-nav::-webkit-scrollbar { height: 6px; }
.sub-nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.sub-chip {
  flex-shrink: 0;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  scroll-snap-align: start;
  min-height: 34px;
  transition: all 0.15s;
  white-space: nowrap;
  -webkit-appearance: none;
  appearance: none;
}
.sub-chip:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--accent);
}
.sub-chip.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  border-color: transparent;
  font-weight: 500;
}
.sub-chip.active .chip-count {
  background: rgba(255, 255, 255, 0.25);
  color: white;
}
.chip-count {
  background: var(--bg-2);
  color: var(--text-dim);
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 11px;
  min-width: 18px;
  text-align: center;
}

/* 分组标题（分类页无子筛选时展示各子类分组） */
.group-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0 12px;
  color: var(--text-dim);
}
.group-header:first-child { margin-top: 0; }
.group-header .group-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.group-header .group-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text);
}
.group-header .group-count {
  font-size: 11px;
  background: var(--surface);
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: translateY(-100%);
  transition: transform 0.2s;
}
.tool-card:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--card-hover-shadow);
}
.tool-card:active {
  transform: scale(0.98);
}
.tool-card:hover::before,
.tool-card:active::before {
  transform: translateY(0);
}
.tool-card .tool-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.tool-card .tool-name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}
.tool-card .tool-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
}
.tool-card .tool-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 10px;
  color: var(--text-dim);
  background: var(--bg-2);
  padding: 2px 8px;
  border-radius: 10px;
}

/* ============ 工具工作区 ============ */
.workspace {
  animation: fadeIn 0.25s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tool-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.tool-panel h3 {
  font-size: 16px;
  margin-bottom: 6px;
}
.tool-panel .subtitle {
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 20px;
}

/* 常用组件 */
.field {
  margin-bottom: 16px;
}
.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text-dim);
}
.field input[type="text"],
.field input[type="number"],
.field input[type="search"],
.field input[type="url"],
.field input[type="datetime-local"],
.field textarea,
.field select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px; /* iOS ≥16 防止聚焦缩放，实际视觉不臃肿保 15+16 folder */
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
  appearance: none;
  min-height: 44px;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
}
.field textarea {
  min-height: 120px;
  resize: vertical;
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 14px;
}
.field input[type="color"] {
  min-height: 60px;
  padding: 4px;
}
.field input[type="range"] {
  min-height: auto;
  padding: 0;
  background: transparent;
  border: none;
}

.btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.15s;
  font-weight: 500;
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
}
.btn:hover {
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn:active { transform: scale(0.97); }
.btn.secondary {
  background: var(--surface-hover);
  color: var(--text);
}
.btn.danger { background: var(--danger); }

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.btn-row .btn { flex: 1 1 auto; min-width: 120px; }

.result {
  margin-top: 16px;
  padding: 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.result.success { border-color: var(--success); }
.result.error { border-color: var(--danger); color: var(--danger); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 40px 20px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 16px;
  display: block;
}
.drop-zone:hover, .drop-zone.dragover, .drop-zone:active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  color: var(--text);
}
.drop-zone input { display: none; }

.preview-img {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}

.info-list {
  list-style: none;
  padding: 0;
}
.info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  flex-wrap: wrap;
}
.info-list li:last-child { border-bottom: none; }
.info-list .k { color: var(--text-dim); flex-shrink: 0; }
.info-list .v {
  color: var(--text);
  font-family: monospace;
  text-align: right;
  word-break: break-all;
  min-width: 0;
}

.color-block {
  width: 100%;
  height: 80px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 10px;
}

.qr-out {
  display: flex;
  justify-content: center;
  padding: 20px;
  background: white;
  border-radius: 8px;
  margin-top: 12px;
}
.qr-out img { max-width: 100%; height: auto; }

.tag {
  display: inline-block;
  background: var(--surface-hover);
  color: var(--text);
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11px;
  margin-right: 4px;
}

.pomodoro-timer {
  font-size: 72px;
  font-family: "JetBrains Mono", monospace;
  text-align: center;
  padding: 30px 0;
  font-weight: 300;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

audio { width: 100%; }

/* ============ 响应式：平板 ============ */
@media (max-width: 900px) {
  :root { --sidebar-w: 240px; }
  .main { padding: calc(18px + var(--safe-top)) 20px calc(20px + var(--safe-bottom)); }
  .tool-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
  }
  .tool-card { padding: 16px; }
  .tool-card .tool-icon { font-size: 28px; margin-bottom: 8px; }
  .tool-card .tool-name { font-size: 14px; }
  .tool-panel { padding: 20px; }
}

/* ============ 响应式：手机 ============ */
@media (max-width: 640px) {
  body { display: block; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    height: 100dvh;
    width: 84%;
    max-width: 320px;
    transform: translateX(-100%);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.4);
  }
  .sidebar.open { transform: translateX(0); }

  .close-drawer { display: flex; align-items: center; justify-content: center; }

  .main {
    height: 100vh;
    height: 100dvh;
    padding: calc(14px + var(--safe-top)) 16px calc(20px + var(--safe-bottom));
  }

  .menu-btn { display: inline-flex; align-items: center; justify-content: center; }

  .topbar {
    margin-bottom: 16px;
    padding-bottom: 12px;
    gap: 8px;
  }
  .topbar h2 { font-size: 17px; }
  .topbar p { font-size: 11px; }
  .theme-toggle { width: 36px; height: 36px; font-size: 16px; }
  .back-btn { padding: 6px 12px; font-size: 12px; }

  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .tool-card { padding: 14px; }
  .tool-card .tool-tag {
    top: 8px; right: 8px;
    font-size: 9px;
    padding: 1px 6px;
  }
  .tool-card .tool-icon { font-size: 26px; margin-bottom: 6px; }
  .tool-card .tool-name { font-size: 13px; }
  .tool-card .tool-desc {
    font-size: 11px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .tool-panel { padding: 16px; border-radius: 10px; }

  .two-col { grid-template-columns: 1fr; gap: 12px; }

  .btn-row { gap: 8px; }
  .btn-row .btn { min-width: 100px; padding: 12px 16px; }

  .drop-zone { padding: 30px 16px; }

  .pomodoro-timer { font-size: 56px; padding: 20px 0; }

  .info-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 8px 0;
  }
  .info-list .v { text-align: left; }
}

/* 超小屏（<380） */
@media (max-width: 380px) {
  .tool-grid { grid-template-columns: 1fr; }
  .pomodoro-timer { font-size: 44px; }
}

/* ============ JSON 格式化工具 ============ */
.json-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.json-toolbar .btn {
  padding: 8px 14px;
  min-height: 36px;
  font-size: 13px;
}
.json-status {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
}
.json-status.ok { color: var(--success); border-color: var(--success); }
.json-status.err { color: var(--danger); border-color: var(--danger); }

.json-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  height: calc(100vh - 320px);
  min-height: 400px;
}

.json-side {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  min-height: 0;
}
.json-side-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-dim);
  gap: 8px;
}
.json-side-header > span:first-child { display: flex; align-items: center; gap: 8px; overflow: hidden; }
.json-path {
  color: var(--accent);
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 260px;
}
.json-side-actions { display: flex; gap: 4px; flex-shrink: 0; }
.chip-btn {
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s;
  min-height: 26px;
  -webkit-appearance: none;
  appearance: none;
}
.chip-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--accent);
}

/* 编辑器 + 行号 */
.json-editor {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}
.json-linenum {
  padding: 12px 8px 12px 12px;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  text-align: right;
  user-select: none;
  min-width: 44px;
  overflow: hidden;
  white-space: pre;
}
.json-linenum .ln-err {
  background: var(--danger);
  color: white;
  padding: 0 4px;
  border-radius: 3px;
}
#jsonInput {
  flex: 1;
  padding: 12px 14px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  resize: none;
  min-width: 0;
  -webkit-appearance: none;
  appearance: none;
}

.json-err {
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 12px;
  line-height: 1.5;
}
.json-err.err {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
  border-top-color: var(--danger);
}
.json-err.warn {
  background: color-mix(in srgb, #f59e0b 15%, transparent);
  color: #f59e0b;
  border-top-color: #f59e0b;
}

/* 右侧树 */
.json-tree {
  flex: 1;
  overflow: auto;
  padding: 12px 14px;
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.9;
  -webkit-overflow-scrolling: touch;
}
.json-tree-empty {
  color: var(--text-dim);
  text-align: center;
  padding: 60px 20px;
  font-size: 13px;
}

/* 节点包装 */
.jt-node { position: relative; }

/* 每行：toggle + key + 值/预览 + 快捷菜单 */
.jt-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 1px 6px 1px 4px;
  border-radius: 4px;
  cursor: default;
  position: relative;
  min-width: 0;
}
.jt-object > .jt-head, .jt-array > .jt-head { cursor: pointer; }
.jt-head:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.jt-head:hover .jt-actions-inline { opacity: 1; }

/* 折叠三角 */
.jt-toggle {
  color: var(--text-dim);
  font-size: 9px;
  width: 12px;
  text-align: center;
  user-select: none;
  flex-shrink: 0;
  transition: transform 0.15s;
}
.jt-toggle-empty {
  color: var(--border);
}

/* 括号 */
.jt-brace {
  color: var(--text-dim);
  font-weight: 600;
  flex-shrink: 0;
}

/* 数量徽章 */
.jt-count-badge {
  color: var(--text-dim);
  font-size: 10px;
  padding: 1px 7px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  flex-shrink: 0;
  font-weight: 500;
}

/* 折叠预览摘要 */
.jt-preview {
  color: var(--text-dim);
  font-size: 12px;
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
  opacity: 0;
  transition: opacity 0.15s;
}
.jt-collapsed > .jt-head > .jt-preview { opacity: 1; }
.jt-brace-close { display: none; }
.jt-collapsed > .jt-head > .jt-brace-close { display: inline; }

/* 键名 */
.jt-key {
  color: #d97757;
  flex-shrink: 0;
}
[data-theme="dark"] .jt-key { color: #f0b98a; }
.jt-key:hover { text-decoration: underline; }

/* 数组索引徽章 */
.jt-index {
  color: var(--text-dim);
  font-size: 10px;
  padding: 1px 6px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-weight: 500;
}

.jt-colon { color: var(--text-dim); margin: 0 2px 0 -2px; flex-shrink: 0; }

/* 值类型着色 */
.jt-value {
  padding: 0 2px;
  word-break: break-all;
  min-width: 0;
}
.jt-value-string { color: #16a34a; }
.jt-value-number { color: #2563eb; }
.jt-value-boolean { color: #9333ea; font-weight: 500; }
.jt-value-null { color: var(--text-dim); font-style: italic; }
[data-theme="dark"] .jt-value-string { color: #86efac; }
[data-theme="dark"] .jt-value-number { color: #93c5fd; }
[data-theme="dark"] .jt-value-boolean { color: #c4b5fd; }

/* 长字符串长度提示 */
.jt-type-hint {
  color: var(--text-dim);
  font-size: 10px;
  padding: 0 6px;
  background: var(--bg-2);
  border-radius: 999px;
  flex-shrink: 0;
}

/* 可点击展开的长字符串 */
.jt-expandable {
  cursor: pointer;
  border-bottom: 1px dotted currentColor;
}
.jt-expandable.jt-expanded { white-space: pre-wrap; }

/* 链接 */
.jt-link {
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}
.jt-link:hover { text-decoration-style: solid; }

/* 行内快捷菜单（复制路径 / 复制值） */
.jt-actions-inline {
  margin-left: auto;
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.jt-mini {
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-dim);
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: auto;
}
.jt-mini:hover {
  background: var(--surface-hover);
  color: var(--accent);
  border-color: var(--accent);
}

/* 子节点列表：竖排 + 左侧连接线 */
.jt-list {
  list-style: none;
  padding-left: 20px;
  margin: 0;
  position: relative;
}
.jt-list::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 8px;
  width: 1px;
  background: var(--border);
}
.jt-object:hover > .jt-list::before,
.jt-array:hover > .jt-list::before {
  background: color-mix(in srgb, var(--accent) 40%, transparent);
}
.jt-item {
  position: relative;
  padding-left: 0;
}
.jt-item::before {
  content: '';
  position: absolute;
  left: -11px;
  top: 14px;
  width: 10px;
  height: 1px;
  background: var(--border);
}

/* 折叠状态 */
.jt-collapsed > .jt-list { display: none; }
.jt-collapsed > .jt-head > .jt-toggle { transform: rotate(0deg); }

/* 手机端：改单列纵向布局 */
@media (max-width: 900px) {
  .json-panel {
    grid-template-columns: 1fr;
    height: auto;
    min-height: 0;
  }
  .json-side { height: 400px; }
}
@media (max-width: 640px) {
  .json-toolbar .btn { flex: 1 1 30%; font-size: 12px; padding: 8px 10px; }
  .json-status { flex: 1 1 100%; margin-left: 0; text-align: center; }
  .json-side { height: 320px; }
  .json-path { max-width: 140px; }
  #jsonInput, .json-linenum { font-size: 12px; }
  .json-tree { font-size: 12px; }
}

/* ============ Cron 表达式工具 ============ */
.cron-help {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  overflow: hidden;
}
.cron-help summary {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
  background: var(--bg-2);
  user-select: none;
  list-style: none;
}
.cron-help summary::-webkit-details-marker { display: none; }
.cron-help summary::before {
  content: '▶';
  display: inline-block;
  margin-right: 8px;
  font-size: 10px;
  color: var(--text-dim);
  transition: transform 0.15s;
}
.cron-help[open] summary::before { transform: rotate(90deg); }
.cron-help summary:hover { background: var(--surface-hover); }
.cron-help-body { padding: 14px; }

.cron-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.cron-table th,
.cron-table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.cron-table thead th {
  color: var(--text-dim);
  font-weight: 500;
  background: var(--bg-2);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.cron-table code {
  background: var(--bg-2);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: "JetBrains Mono", Menlo, monospace;
  color: var(--accent);
  font-size: 11px;
}
.cron-table tbody tr:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.cron-table tbody tr:last-child td { border-bottom: none; }

/* 模板分组 */
.cron-presets {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cron-preset-group {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
.cron-preset-title {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}
.cron-preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 手机端调整 */
@media (max-width: 640px) {
  .cron-table { font-size: 11px; }
  .cron-table th, .cron-table td { padding: 6px 8px; }
  .cron-help-body { padding: 10px; overflow-x: auto; }
}

/* ============ 时间计算器 ============ */
.calc-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.calc-tab {
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 13px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
  white-space: nowrap;
  -webkit-appearance: none;
  appearance: none;
}
.calc-tab:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}
.calc-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}
.calc-panel { animation: fadeIn 0.2s ease; }

/* 时间段 7 段输入 */
.calc-duration {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.calc-duration label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: stretch;
  margin-bottom: 0;
}
.calc-duration label span {
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
}
.calc-duration input {
  width: 100%;
  padding: 8px 6px;
  text-align: center;
  font-family: "JetBrains Mono", Menlo, monospace;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  outline: none;
  font-size: 14px;
  min-height: 40px;
  -webkit-appearance: none;
  appearance: none;
  -moz-appearance: textfield;
}
.calc-duration input::-webkit-outer-spin-button,
.calc-duration input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.calc-duration input:focus {
  border-color: var(--accent);
}

@media (max-width: 640px) {
  .calc-duration { grid-template-columns: repeat(4, 1fr); }
  .calc-tab { font-size: 12px; padding: 8px 10px; }
}

/* ============ 文本比较 (Diff) 工具 ============ */
.diff-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.diff-toolbar .diff-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
}
.diff-radio, .diff-check {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-dim);
  cursor: pointer;
  margin: 0;
  font-size: 12px;
}
.diff-radio input, .diff-check input {
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
}
.diff-status {
  margin-left: auto;
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 11px;
}
.diff-stat-eq { color: var(--text-dim); }
.diff-stat-add { color: var(--success); }
.diff-stat-del { color: var(--danger); }
.diff-stat-sim {
  padding: 2px 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--accent);
}
.diff-json-status {
  font-family: "JetBrains Mono", Menlo, monospace;
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 999px;
  color: var(--text-dim);
  border: 1px solid transparent;
}
.diff-json-status.ok {
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 40%, transparent);
  background: color-mix(in srgb, var(--success) 8%, transparent);
}
.diff-json-status.err {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 40%, transparent);
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  cursor: help;
}

/* 输入区：填满剩余高度 */
.diff-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.diff-inputs-fill {
  /* 顶部工具栏约 46px + 底部按钮约 60px + 主容器 padding 约 48px */
  height: calc(100vh - 260px);
  min-height: 360px;
}
.diff-side-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.diff-side-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.diff-side-header > :last-child {
  margin-left: auto;
}
.diff-badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  margin-left: 6px;
}
.diff-badge-old { background: color-mix(in srgb, var(--danger) 20%, transparent); color: var(--danger); }
.diff-badge-new { background: color-mix(in srgb, var(--success) 20%, transparent); color: var(--success); }

/* === 编辑器容器：底层高亮 + 上层 textarea === */
.diff-editor {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* 两个层共用的字体和排版规则（**必须完全一致**才能对齐）*/
.diff-editor .diff-hl,
.diff-editor textarea {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 10px 12px;
  border: 0;
  font-family: "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0;
  tab-size: 4;
  white-space: pre;             /* 不换行；超出用横向滚动 */
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* 底层：仅显示高亮字符 */
.diff-editor .diff-hl {
  color: var(--text);
  background: transparent;
  pointer-events: none;         /* 让点击穿透到 textarea */
  user-select: none;
  z-index: 1;
  overflow: hidden;             /* 由上层 textarea 控制滚动，同步用 JS */
  word-wrap: normal;
  overflow-wrap: normal;
}

/* 上层：接收输入的 textarea */
.diff-editor textarea {
  background: transparent;
  color: transparent;           /* 文字透明 */
  caret-color: var(--text);     /* 光标可见 */
  outline: none;
  resize: none;
  z-index: 2;
  -webkit-appearance: none;
  appearance: none;
  /* 让选中的文字有底色（Chrome/Safari）*/
}
.diff-editor textarea::selection {
  background: color-mix(in srgb, var(--accent) 35%, transparent);
  color: transparent;
}
.diff-editor textarea::placeholder {
  color: var(--text-dim);
}

/* 高亮标记（词/字符级） */
.diff-hl .diff-mark-del {
  background: color-mix(in srgb, var(--danger) 28%, transparent);
  color: var(--text);
  border-radius: 3px;
  box-shadow: inset 0 -1px 0 var(--danger);
}
.diff-hl .diff-mark-add {
  background: color-mix(in srgb, var(--success) 28%, transparent);
  color: var(--text);
  border-radius: 3px;
  box-shadow: inset 0 -1px 0 var(--success);
}

/* 行级高亮（整行背景） */
.diff-hl .diff-line-del {
  display: inline-block;
  min-width: 100%;
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  box-shadow: inset 3px 0 0 var(--danger);
  padding-left: 4px;
  margin-left: -4px;
}
.diff-hl .diff-line-add {
  display: inline-block;
  min-width: 100%;
  background: color-mix(in srgb, var(--success) 18%, transparent);
  box-shadow: inset 3px 0 0 var(--success);
  padding-left: 4px;
  margin-left: -4px;
}
.diff-hl .diff-line-empty {
  display: inline-block;
  min-width: 100%;
  background: color-mix(in srgb, var(--text-dim) 8%, transparent);
}

/* 手机端：上下堆叠，各自 50vh 左右 */
@media (max-width: 640px) {
  .diff-inputs { grid-template-columns: 1fr; }
  .diff-inputs-fill { height: auto; }
  .diff-side-input { height: 44vh; min-height: 260px; }
  .diff-status { margin-left: 0; width: 100%; justify-content: space-between; }
}

/* ============ PDF 工具页面美化 ============ */
.drop-zone-icon {
  font-size: 40px;
  margin-bottom: 10px;
  transition: transform 0.2s;
}
.drop-zone:hover .drop-zone-icon,
.drop-zone.dragover .drop-zone-icon {
  transform: scale(1.15) translateY(-2px);
}
.drop-zone-text {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}
.drop-zone-hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 6px;
}

/* PDF 信息条：文件名 + 大小 + 页数 */
.pdf-info-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 8px;
  margin: 12px 0;
  font-size: 13px;
}
.pdf-info-bar .pi-icon {
  font-size: 22px;
  flex-shrink: 0;
}
.pdf-info-bar .pi-main {
  flex: 1;
  min-width: 0;
}
.pdf-info-bar .pi-name {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pdf-info-bar .pi-meta {
  color: var(--text-dim);
  font-size: 11px;
  margin-top: 2px;
  font-family: "JetBrains Mono", Menlo, monospace;
}
.pdf-info-bar .pi-remove {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}
.pdf-info-bar .pi-remove:hover {
  color: var(--danger);
  border-color: var(--danger);
}

/* 多文件列表 */
.pdf-file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}
.pdf-file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all 0.15s;
}
.pdf-file-item:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}
.pdf-file-item .pf-order {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
}
.pdf-file-item .pf-icon {
  font-size: 18px;
  flex-shrink: 0;
}
.pdf-file-item .pf-main {
  flex: 1;
  min-width: 0;
}
.pdf-file-item .pf-name {
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pdf-file-item .pf-size {
  font-size: 11px;
  color: var(--text-dim);
  font-family: "JetBrains Mono", Menlo, monospace;
}
.pdf-file-item .pf-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.pdf-file-item .pf-actions button {
  width: 30px;
  height: 30px;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 13px;
}
.pdf-file-item .pf-actions button:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent);
}
.pdf-file-item .pf-actions button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.pdf-file-item .pf-actions .pf-rm:hover {
  color: var(--danger);
  border-color: var(--danger);
}

/* 进度条 */
.pdf-progress {
  margin: 12px 0;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
}
.pdf-progress-bar {
  height: 6px;
  background: var(--bg-2);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 8px;
}
.pdf-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, var(--success)));
  border-radius: 999px;
  transition: width 0.3s;
}

/* 结果卡片 */
.pdf-result-card {
  margin-top: 14px;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--success) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--success) 30%, transparent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.pdf-result-card.error {
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  border-color: color-mix(in srgb, var(--danger) 30%, transparent);
}
.pdf-result-card .pr-icon {
  font-size: 24px;
  flex-shrink: 0;
}
.pdf-result-card .pr-msg {
  flex: 1;
  font-size: 13px;
  color: var(--text);
  line-height: 1.5;
}
.pdf-result-card.error .pr-msg { color: var(--danger); }

/* 选项分区（卡片式分组） */
.pdf-options {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 12px 0;
}
.pdf-options-title {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  font-weight: 500;
}

/* 主行动按钮加大 */
.pdf-primary-btn {
  padding: 12px 24px !important;
  font-size: 14px !important;
  min-height: 44px;
  font-weight: 500;
}

/* ============ PDF 阅读器 ============ */
.pdf-reader {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
  height: calc(100vh - 260px);
  min-height: 500px;
  margin-top: 12px;
}
.pdf-reader:fullscreen {
  height: 100vh;
  min-height: 100vh;
  border: none;
  border-radius: 0;
  background: var(--bg-2);
}

.pdf-reader-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.pdf-rt-group {
  display: flex;
  align-items: center;
  gap: 4px;
}
.pdf-rt-page {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-dim);
  padding: 0 6px;
}
.pdf-rt-page input {
  width: 46px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-size: 12px;
  text-align: center;
  -webkit-appearance: none;
  appearance: none;
  -moz-appearance: textfield;
}
.pdf-rt-page input::-webkit-outer-spin-button,
.pdf-rt-page input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.pdf-reader-toolbar select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-size: 12px;
  min-width: 90px;
}

.pdf-rt-search {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 200px;
  max-width: 320px;
}
.pdf-rt-search input {
  flex: 1;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  font-size: 12px;
}
.pdf-rt-search input:focus {
  border-color: var(--accent);
}
.pdf-rt-search-status {
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
}

.pdf-reader-body {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

.pdf-reader-side {
  overflow-y: auto;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}
.pdf-side-title {
  padding: 10px 12px;
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-2);
  z-index: 1;
}
.pdf-side-loading, .pdf-side-empty {
  padding: 16px 12px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* 目录 */
.pdf-reader-outline {
  width: 260px;
}
.pdf-outline-list {
  padding: 6px 0;
}
.pdf-outline-item {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  border-left: 3px solid transparent;
  line-height: 1.4;
  transition: all 0.15s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pdf-outline-item:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left-color: var(--accent);
  color: var(--accent);
}

/* 缩略图 */
.pdf-reader-thumbs {
  width: 160px;
}
.pdf-thumb-list {
  padding: 10px;
}
.pdf-thumb {
  position: relative;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: 6px;
  margin-bottom: 8px;
  background: white;
  transition: all 0.15s;
  overflow: hidden;
}
.pdf-thumb:hover { border-color: color-mix(in srgb, var(--accent) 60%, transparent); }
.pdf-thumb.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}
.pdf-thumb canvas { display: block; width: 100%; height: auto; }
.pdf-thumb-num {
  position: absolute;
  bottom: 4px;
  right: 4px;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 999px;
  font-family: "JetBrains Mono", Menlo, monospace;
}

.pdf-reader-canvas-wrap {
  flex: 1;
  overflow: auto;
  background: var(--bg-2);
  padding: 20px;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}
.pdf-pages-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.pdf-pages-container.layout-double {
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 20px;
}
/* 首页封面：双栏时第一页占满整行 */
.pdf-pages-container.layout-double.layout-cover > .pdf-page-wrap:first-child {
  flex-basis: 100%;
}
.pdf-page-wrap {
  position: relative;
  background: white;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  border-radius: 2px;
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  scroll-margin-top: 12px;
}
.pdf-page-num {
  position: absolute;
  top: 6px;
  right: 8px;
  background: rgba(0, 0, 0, 0.55);
  color: white;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  font-family: "JetBrains Mono", Menlo, monospace;
  pointer-events: none;
  z-index: 2;
}
.pdf-reader-canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 移动端 */
@media (max-width: 640px) {
  .pdf-reader { height: calc(100vh - 200px); min-height: 400px; }
  .pdf-reader-toolbar { gap: 6px; padding: 6px 8px; }
  .pdf-rt-search { flex-basis: 100%; max-width: none; margin-left: 0; order: 99; }
  .pdf-reader-thumbs { width: 100px; }
  .pdf-reader-outline { width: 180px; }
  .pdf-thumb { margin-bottom: 6px; }
  .pdf-pages-container.layout-double { flex-direction: column; }
}

/* ========== 简易计算器 ========== */
.calc-app {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.calc-display {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}
.calc-expr {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg, inherit);
  font: 500 22px/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  padding: 4px 0;
  text-align: right;
  letter-spacing: 0.5px;
}
.calc-expr::placeholder { color: var(--muted, #888); opacity: 0.6; }
.calc-result {
  min-height: 28px;
  text-align: right;
  font: 600 18px/1.4 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: var(--muted, #888);
  transition: color 0.15s;
  word-break: break-all;
}
.calc-result.ok { color: var(--accent); }
.calc-result.success { color: #22c55e; font-size: 22px; }
.calc-result.error { color: #ef4444; }
.calc-result.muted { opacity: 0.55; font-size: 13px; font-weight: 400; }

.calc-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.calc-tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg, inherit);
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}
.calc-tab:hover { border-color: var(--accent); }
.calc-tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

.calc-pad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.calc-key {
  height: 54px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-2);
  color: var(--fg, inherit);
  font-size: 18px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.05s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}
.calc-key:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-2));
}
.calc-key:active { transform: scale(0.96); }

.calc-key.op {
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-2));
  color: var(--accent);
  font-size: 20px;
  font-weight: 600;
}
.calc-key.op:hover { background: color-mix(in srgb, var(--accent) 22%, var(--bg-2)); }

.calc-key.op-fn {
  background: color-mix(in srgb, var(--border) 40%, var(--bg-2));
  font-size: 15px;
  font-weight: 500;
}
.calc-key.op-clear { color: #ef4444; font-weight: 600; }
.calc-key.op-back { color: #f59e0b; }

.calc-key.op-eq {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 40%, transparent);
}
.calc-key.op-eq:hover {
  filter: brightness(1.08);
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.calc-hist-wrap { margin-top: 4px; }
.calc-hist-wrap .calc-hist-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.calc-hist-title { display: inline-flex; align-items: center; gap: 6px; line-height: 1.2; }
.calc-hist-clear {
  flex: 0 0 auto;
  padding: 4px 10px;
  height: 26px;
  line-height: 1;
  font-size: 12px;
  border-radius: 6px;
  margin: 0;
}
.calc-hint { font-size: 12px; color: var(--muted, #888); font-weight: normal; }
.calc-hist {
  max-height: 220px;
  overflow-y: auto;
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.calc-hist-empty {
  color: var(--muted, #888);
  font-size: 13px;
  padding: 8px;
  text-align: center;
  display: block;
}
.calc-hist-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  font: 400 13px/1.3 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  border: 1px solid transparent;
  transition: background 0.12s, border-color 0.12s;
}
.calc-hist-item:hover {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}
.calc-hist-expr { color: var(--muted, #888); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.calc-hist-eq { color: var(--muted, #888); }
.calc-hist-val { color: var(--accent); font-weight: 600; }

.btn.ghost.small {
  padding: 2px 10px;
  font-size: 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted, #888);
  border-radius: 6px;
  cursor: pointer;
}
.btn.ghost.small:hover { color: var(--accent); border-color: var(--accent); }

/* 计算器 - 移动端 */
@media (max-width: 640px) {
  .calc-key { height: 48px; font-size: 16px; }
  .calc-key.op { font-size: 18px; }
  .calc-key.op-eq { font-size: 20px; }
  .calc-key.op-fn { font-size: 13px; }
  .calc-expr { font-size: 20px; }
}

/* ========== 单位换算 (prod-unit) ========== */
.uc-app {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* 顶部类型 Chip 条 */
.uc-catbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.uc-cat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--fg);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
  white-space: nowrap;
}
.uc-cat:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.uc-cat.active {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.uc-cat-icon { font-size: 15px; }

/* 换算面板 */
.uc-panel {
  padding: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.uc-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 10px;
  align-items: center;
}
.uc-side { display: flex; flex-direction: column; gap: 4px; }
.uc-side-label {
  font-size: 12px;
  color: var(--muted, #888);
  font-weight: 500;
}
.uc-input-line {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel, var(--bg));
  transition: border-color 0.15s;
}
.uc-input-line:focus-within { border-color: var(--accent); }
.uc-input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  color: var(--fg);
  padding: 10px 12px;
  font-size: 18px;
  font-variant-numeric: tabular-nums;
  font-family: inherit;
}
.uc-input-out { color: var(--accent); font-weight: 600; }
.uc-unit {
  border: none;
  border-left: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  padding: 0 10px;
  font-size: 13px;
  cursor: pointer;
  outline: none;
  max-width: 180px;
}
.uc-swap {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel, var(--bg));
  color: var(--fg);
  cursor: pointer;
  font-size: 18px;
  align-self: end;
  margin-bottom: 2px;
  transition: all 0.2s;
}
.uc-swap:hover {
  background: var(--accent);
  color: #fff;
  transform: rotate(180deg);
  border-color: var(--accent);
}

/* 目标单位网格 */
.uc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 6px;
}
.uc-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 8px 6px;
  background: var(--panel, var(--bg));
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--fg);
  cursor: pointer;
  transition: all 0.15s;
  min-height: 52px;
}
.uc-cell:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, var(--panel, var(--bg)));
}
.uc-cell.active {
  background: color-mix(in srgb, var(--accent) 25%, transparent);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.uc-cell-sym { font-size: 14px; font-weight: 600; }
.uc-cell-name { font-size: 11px; color: var(--muted, #888); }
.uc-cell.active .uc-cell-name { color: var(--accent); opacity: 0.85; }

/* 工具行 */
.uc-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 8px 2px 0;
  border-top: 1px dashed var(--border);
  font-size: 13px;
}
.uc-check { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; user-select: none; }
.uc-prec-wrap { display: inline-flex; align-items: center; gap: 6px; }
.uc-prec-label { color: var(--muted, #888); }
.uc-prec {
  width: 56px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
}
.uc-hint {
  font-size: 13px;
  color: var(--muted, #888);
  padding: 2px 2px 0;
  font-variant-numeric: tabular-nums;
  min-height: 18px;
}

/* 全单位换算表 */
.uc-table-wrap {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px 12px;
}
.uc-table-wrap summary {
  cursor: pointer;
  padding: 8px 0;
  font-size: 13px;
  color: var(--muted, #888);
  user-select: none;
  list-style: none;
}
.uc-table-wrap summary::-webkit-details-marker { display: none; }
.uc-table-wrap summary::before { content: '▸ '; display: inline-block; transition: transform 0.2s; }
.uc-table-wrap[open] summary::before { transform: rotate(90deg); }
.uc-table {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 4px;
  padding: 4px 0 10px;
}
.uc-trow {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--panel, var(--bg));
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.uc-trow:hover { border-color: var(--accent); }
.uc-trow.active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-color: var(--accent);
}
.uc-tsym { font-weight: 600; color: var(--accent); }
.uc-tname { color: var(--muted, #888); font-size: 12px; }
.uc-tval {
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--fg);
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========== 页脚（备案信息） ========== */
.site-footer {
  /* Sticky footer：
     - 内容少：margin-top:auto 把它推到 flex 容器底 → 视口底部
     - 内容多：容器已被内容撑满，剩余空间 = 0 → footer 落到内容之后，需滚动到底才见 */
  margin-top: auto;
  padding: 20px 4px 8px;
  border-top: 1px solid var(--border);
  color: var(--muted, #8a8fa8);
  font-size: 12px;
  line-height: 1.8;
  text-align: center;
  flex-shrink: 0;
}
.site-footer .footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 12px;
}
.site-footer .footer-copy { color: var(--fg); opacity: 0.7; }
.site-footer .footer-sep { opacity: 0.4; }
.site-footer .footer-desc { opacity: 0.75; }
.site-footer .footer-beian { margin-top: 4px; }
.site-footer .footer-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.site-footer .footer-link:hover { color: var(--accent); }
.site-footer .footer-mps-icon {
  width: 14px; height: 14px;
  display: inline-block;
  vertical-align: middle;
  opacity: 0.7;
}

@media (max-width: 640px) {
  .site-footer { font-size: 11px; padding: 16px 4px 8px; }
  .site-footer .footer-sep { display: none; }
  .site-footer .footer-row { gap: 4px 10px; }
}

/* ========== PDF 去水印工具 ========== */
.pdf-rw-app { display: flex; flex-direction: column; gap: 12px; }
.pdf-rw-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 10px; flex-wrap: wrap;
}
.pdf-rw-tabs { display: flex; gap: 4px; }
.pdf-rw-tab {
  padding: 6px 12px; background: transparent; border: 1px solid var(--border);
  border-radius: 6px; color: var(--fg); cursor: pointer; font-size: 13px;
}
.pdf-rw-tab:hover { border-color: var(--accent); }
.pdf-rw-tab.active {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border-color: var(--accent); color: var(--accent); font-weight: 600;
}
.pdf-rw-info { font-size: 12px; color: var(--muted, #888); }

.pdf-rw-panel { display: none; flex-direction: column; gap: 10px; padding: 12px;
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 10px; }
.pdf-rw-panel.active { display: flex; }
.pdf-rw-panel-hint {
  font-size: 12px; color: var(--muted, #888); line-height: 1.6;
  padding: 8px 10px;
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  border-left: 3px solid var(--accent); border-radius: 4px;
}
.pdf-rw-opts { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.pdf-rw-opts label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; }
.pdf-rw-opts input[type="color"] { width: 32px; height: 28px; border: 1px solid var(--border); border-radius: 4px; background: var(--panel); cursor: pointer; }
.pdf-rw-opts input[type="text"] { padding: 5px 8px; border: 1px solid var(--border); border-radius: 5px; background: var(--panel); color: var(--fg); font-size: 13px; }

/* 页面网格 */
.pdf-rw-pages {
  display: flex; flex-direction: column; gap: 16px;
  max-height: calc(100vh - 380px); min-height: 400px; overflow-y: auto;
  padding: 12px; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 10px;
}
.pdf-rw-page {
  position: relative; display: inline-block; align-self: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.pdf-rw-page canvas { display: block; }
.pdf-rw-page-overlay {
  position: absolute; top: 0; left: 0;
  cursor: crosshair;
}
.pdf-rw-page-label {
  position: absolute; bottom: -22px; left: 0;
  font-size: 11px; color: var(--muted, #888);
  font-variant-numeric: tabular-nums;
}
.pdf-rw-rect {
  position: absolute;
  outline: 2px dashed var(--accent);
  outline-offset: -2px;
  opacity: 0.85;
  cursor: pointer;
}
.pdf-rw-rect-drawing {
  background: color-mix(in srgb, var(--accent) 30%, transparent);
  pointer-events: none;
}

.pdf-rw-actions {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 10px; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 10px;
}
.pdf-rw-status { font-size: 13px; color: var(--muted, #888); }
.pdf-rw-status.ok { color: var(--accent); }
.pdf-rw-status.err { color: #ef4444; }

/* ========== 视频水印预览层 ========== */
.wm-preview-wrap {
  position: relative;
  display: inline-block;
  max-width: 100%;
  line-height: 0;
}
.wm-overlay {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: 8px;
}
.wm-mark {
  position: absolute;
  pointer-events: auto;
  cursor: grab;
  user-select: none;
  line-height: 0;
  outline: 1px dashed rgba(255,255,255,0.35);
  outline-offset: 2px;
  transition: outline-color 0.1s;
}
.wm-mark:hover, .wm-mark:active { outline-color: var(--accent); cursor: grabbing; }
.wm-mark img { display: block; max-width: none; }
.wm-mark-tile {
  cursor: default;
  pointer-events: none;
  outline: none;
  opacity: 0.85;
}

/* ========== ffmpeg 视频工具通用样式 ========== */
.ff-app { display: flex; flex-direction: column; gap: 14px; }
.ff-warning {
  padding: 12px 14px;
  background: color-mix(in srgb, #f59e0b 12%, transparent);
  border: 1px solid #f59e0b;
  border-radius: 8px;
  color: var(--fg);
  font-size: 13px;
  line-height: 1.7;
}
.ff-warning code {
  background: rgba(0,0,0,0.15);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 12px;
}

/* 引擎模式切换栏 */
.ff-engine-bar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-radius: 8px;
}
.ff-engine-label {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--fg);
}
.ff-engine-select {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
  cursor: pointer;
}
.ff-engine-status {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--border);
  color: var(--muted);
}
.ff-engine-status[data-loaded="yes"] {
  background: color-mix(in srgb, #10b981 20%, transparent);
  color: #10b981;
}
.ff-engine-reset { flex-shrink: 0; font-size: 12px; padding: 4px 10px; }
.ff-engine-reset:disabled { opacity: 0.5; cursor: not-allowed; }
.ff-engine-hint {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}
.ff-engine-hint b { color: #f59e0b; }
@media (max-width: 640px) {
  .ff-engine-label { font-size: 12px; gap: 6px; }
  .ff-engine-select { font-size: 12px; }
}

.ff-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.ff-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.ff-row label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg);
}
.ff-row select, .ff-row input[type="text"], .ff-row input[type="number"] {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
}
.ff-row input[type="color"] {
  width: 36px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel);
  cursor: pointer;
}
.ff-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.ff-actions .muted { font-size: 12px; color: var(--muted, #888); }

.ff-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: 8px;
}
.ff-progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.ff-progress-bar .fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #fff));
  transition: width 0.15s;
}
.ff-progress-text { font-size: 12px; color: var(--fg); text-align: center; flex: 1; }
.ff-progress-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.ff-cancel-btn {
  flex-shrink: 0;
  font-size: 12px;
  padding: 4px 10px;
}
.ff-cancel-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.ff-log {
  max-height: 120px;
  overflow-y: auto;
  padding: 8px;
  background: rgba(0,0,0,0.2);
  border-radius: 4px;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 11px;
  color: var(--muted);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-all;
}

.ff-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 8px;
}
.ff-result-info { text-align: center; }
.ff-result-info .muted { font-size: 12px; color: var(--muted, #888); margin-top: 3px; }

/* 拼接工具的文件列表 */
.ff-file-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 300px;
  overflow-y: auto;
}
.ff-file-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: var(--panel, var(--bg));
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}
.ff-file-idx {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}
.ff-file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ff-file-size { flex-shrink: 0; }

/* ========== 视频工具 ========== */
.video-app { display: flex; flex-direction: column; gap: 14px; }
.video-loading { padding: 30px; text-align: center; color: var(--muted, #888); }
.video-err { padding: 20px; color: #ef4444; text-align: center; background: color-mix(in srgb, #ef4444 8%, transparent); border-radius: 8px; }

/* 视频信息面板 */
.video-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.video-info-cell {
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-info-cell .k { font-size: 11px; color: var(--muted, #888); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.video-info-cell .v { font-size: 14px; color: var(--fg); word-break: break-all; font-variant-numeric: tabular-nums; }
.video-info-cell .v small { color: var(--muted, #888); font-weight: normal; }
.video-info-preview { margin-top: 8px; text-align: center; }
.video-info-note {
  font-size: 12px;
  color: var(--muted, #888);
  padding: 10px 12px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border-radius: 6px;
  border-left: 3px solid var(--accent);
}

/* 视频截帧 */
.video-frame-preview { text-align: center; }
.video-frame-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-frame-controls label { font-size: 13px; color: var(--muted, #888); }
.video-frame-controls input[type="number"] {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
}
.video-frame-total { font-size: 12px; color: var(--muted, #888); }
.video-frame-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-frame-actions label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg);
}
.video-frame-actions select,
.video-frame-actions input {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
}
.video-frame-actions .muted { font-size: 12px; color: var(--muted, #888); }

.video-frame-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
  max-height: 500px;
  overflow-y: auto;
  padding: 4px;
}
.video-frame-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-frame-item img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: contain;
  background: #000;
  border-radius: 4px;
}
.video-frame-meta .name {
  font-size: 12px;
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.video-frame-meta .muted { font-size: 11px; color: var(--muted, #888); }
.video-frame-item-actions { display: flex; gap: 4px; }

/* GIF / 序列帧 通用控件 */
.video-gif-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-gif-row { display: flex; flex-direction: column; gap: 4px; }
.video-gif-row label { font-size: 12px; color: var(--muted, #888); display: flex; justify-content: space-between; }
.video-gif-row input[type="range"] { width: 100%; }
.video-gif-opts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.video-gif-opts label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg);
}
.video-gif-opts select,
.video-gif-opts input {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
}
.video-gif-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.video-gif-actions .muted { font-size: 12px; color: var(--muted, #888); }

.video-gif-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: 8px;
}
.video-gif-progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.video-gif-progress-bar .fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #fff));
  transition: width 0.15s;
}
.video-gif-progress-text { font-size: 12px; color: var(--fg); text-align: center; }

.video-gif-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 8px;
}
.video-gif-preview img { max-width: 100%; }
.video-gif-meta { font-size: 13px; text-align: center; color: var(--fg); }
.video-gif-meta .muted { font-size: 12px; color: var(--muted, #888); margin-top: 2px; }

/* 视频工具 - 移动端 */
@media (max-width: 640px) {
  .video-info-grid { grid-template-columns: 1fr 1fr; }
  .video-frame-controls { flex-wrap: wrap; }
  .video-frame-actions { gap: 8px; }
  .video-gif-opts { gap: 8px; }
  .video-gif-opts label { font-size: 12px; }
}

/* ========== 文本处理 (text-transform) ========== */
.tt-app { display: flex; flex-direction: column; gap: 12px; }

.tt-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.tt-tab {
  padding: 7px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--fg);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}
.tt-tab:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.tt-tab.active {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.tt-panels {
  padding: 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  min-height: 96px;
}
.tt-panel {
  display: none;
  flex-wrap: wrap;
  gap: 8px;
}
.tt-panel.active { display: flex; }
.tt-op {
  min-width: 120px;
  padding: 10px 12px;
  background: var(--panel, var(--bg));
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--fg);
  cursor: pointer;
  font-size: 13px;
  text-align: center;
  transition: all 0.15s;
  line-height: 1.3;
}
.tt-op small {
  display: block;
  color: var(--muted, #888);
  font-size: 11px;
  margin-top: 2px;
}
.tt-op:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, var(--panel, var(--bg)));
}
.tt-op:active { transform: scale(0.98); }
.tt-op-small { min-width: auto; padding: 6px 12px; font-size: 12px; }
.tt-op-primary {
  background: color-mix(in srgb, var(--accent) 20%, var(--panel, var(--bg)));
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

/* 替换面板专用 */
.tt-rep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  flex: 1 1 100%;
}
.tt-rep-field { display: flex; flex-direction: column; gap: 4px; }
.tt-rep-field label { font-size: 12px; color: var(--muted, #888); }
.tt-rep-field input {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 13px;
  outline: none;
}
.tt-rep-field input:focus { border-color: var(--accent); }
.tt-rep-opts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  flex: 1 1 100%;
}
.tt-check {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

/* 输入输出区（尺寸参考 JSON 工具：撑满剩余视口） */
.tt-io {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  height: calc(100vh - 320px);
  min-height: 400px;
}
.tt-pane { display: flex; flex-direction: column; gap: 6px; min-width: 0; min-height: 0; }
.tt-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted, #888);
  padding: 0 2px;
}
.tt-pane-actions { display: inline-flex; gap: 6px; }
.tt-ta {
  width: 100%;
  flex: 1;
  min-height: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, Menlo, monospace;
  font-size: 13px;
  line-height: 1.55;
  resize: none;
  outline: none;
  white-space: pre;
  overflow: auto;
}
.tt-ta:focus { border-color: var(--accent); }
.tt-out { background: color-mix(in srgb, var(--accent) 4%, var(--panel, var(--bg))); }
.tt-info {
  font-size: 11px;
  color: var(--muted, #888);
  padding: 0 2px;
  font-variant-numeric: tabular-nums;
  min-height: 14px;
}
.tt-status {
  font-size: 13px;
  padding: 6px 2px 0;
  min-height: 18px;
}
.tt-status.ok { color: var(--accent); }
.tt-status.err { color: #ef4444; }

/* 文本处理 - 移动端 */
@media (max-width: 900px) {
  .tt-io { grid-template-columns: 1fr; height: auto; min-height: 0; }
  .tt-pane { min-height: 400px; }
  .tt-rep-row { grid-template-columns: 1fr; }
  .tt-ta { min-height: 320px; resize: vertical; }
}
@media (max-width: 640px) {
  .tt-pane { min-height: 320px; }
}
@media (max-width: 640px) {
  .tt-tab { padding: 6px 10px; font-size: 12px; }
  .tt-op { min-width: 100px; padding: 8px 10px; font-size: 12px; }
  .tt-op small { font-size: 10px; }
}

/* ========== SQL 格式化 (dev-sql-format) ========== */
.sql-app { display: flex; flex-direction: column; gap: 12px; }

.sql-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  align-items: center;
}
.sql-tool-group { display: inline-flex; align-items: center; gap: 6px; }
.sql-lb {
  font-size: 12px;
  color: var(--muted, #888);
  margin: 0;
}
.sql-sel {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}
.sql-sel:focus { border-color: var(--accent); }
.sql-check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.sql-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.sql-pane {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.sql-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted, #888);
  padding: 0 2px;
}
.sql-pane-actions { display: inline-flex; gap: 6px; }
.sql-ta {
  width: 100%;
  min-height: 320px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, Menlo, monospace;
  font-size: 13px;
  line-height: 1.55;
  resize: vertical;
  outline: none;
  tab-size: 2;
  -moz-tab-size: 2;
  white-space: pre;
  overflow: auto;
}
.sql-ta:focus { border-color: var(--accent); }
.sql-out { background: color-mix(in srgb, var(--accent) 4%, var(--panel, var(--bg))); }
.sql-info {
  font-size: 11px;
  color: var(--muted, #888);
  padding: 0 2px;
  font-variant-numeric: tabular-nums;
  min-height: 14px;
}
.sql-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.sql-err {
  color: #ef4444;
  font-size: 13px;
  padding-left: 8px;
}

/* SQL 格式化 - 移动端 */
@media (max-width: 900px) {
  .sql-panels { grid-template-columns: 1fr; }
  .sql-ta { min-height: 240px; }
}
@media (max-width: 640px) {
  .sql-toolbar { gap: 8px; padding: 8px; }
  .sql-lb { font-size: 11px; }
  .sql-sel { font-size: 12px; padding: 4px 6px; }
}

/* 单位换算 - 移动端 */
@media (max-width: 640px) {
  .uc-row {
    grid-template-columns: 1fr;
  }
  .uc-swap {
    justify-self: center;
    margin: 0;
  }
  .uc-cat { padding: 6px 10px; font-size: 12px; }
  .uc-cat-icon { font-size: 14px; }
  .uc-input { font-size: 16px; padding: 9px 10px; }
  .uc-unit { max-width: 140px; font-size: 12px; }
  .uc-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); }
  .uc-cell-sym { font-size: 13px; }
  .uc-cell-name { font-size: 10px; }
  .uc-table { grid-template-columns: 1fr; }
  .uc-tools { gap: 10px; }
}

/* ========== PDF 目录工具（pdf-outline） ========== */
.po-app { display: flex; flex-direction: column; gap: 12px; }

/* 顶部模式切换（提取 / 生成 二选一） */
.po-modes {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--panel, var(--bg));
  border: 1px solid var(--border);
  border-radius: 10px;
}
.po-mode {
  flex: 1;
  padding: 8px 14px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.po-mode:hover { color: var(--fg); }
.po-mode.active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
}

.po-pane { display: flex; flex-direction: column; gap: 12px; }

.po-info {
  padding: 10px 14px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
}
.po-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
}
.po-tab {
  padding: 6px 14px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.po-tab:hover { color: var(--fg); }
.po-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}
.po-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel, var(--bg));
  color: var(--fg);
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  outline: none;
}
.po-textarea:focus { border-color: var(--accent); }
.po-tree {
  max-height: 480px;
  overflow-y: auto;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel, var(--bg));
  font-size: 13px;
}
.po-tree ul { padding-left: 18px; margin: 4px 0; list-style: none; }
.po-tree > ul { padding-left: 0; }
.po-tree li {
  padding: 3px 0 3px 10px;
  border-left: 1px dashed var(--border);
  line-height: 1.6;
}
.po-tree > ul > li { border-left: none; padding-left: 0; }
.po-t { color: var(--fg); }
.po-p { color: var(--accent); font-size: 11px; margin-left: 8px; font-family: monospace; }
.po-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 生成工具的双栏布局 */
.po-gen-help {
  padding: 8px 12px;
  background: color-mix(in srgb, var(--accent) 5%, transparent);
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}
.po-gen-help code {
  background: rgba(0,0,0,0.15);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', Consolas, monospace;
  font-size: 11px;
  color: var(--fg);
}
.po-gen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.po-gen-left, .po-gen-right {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.po-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
}
.po-parse-status, .po-msg {
  font-size: 12px;
  min-height: 18px;
  line-height: 1.6;
}
.po-file-info {
  padding: 8px 12px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
  border-radius: 6px;
  font-size: 13px;
}
.po-ok   { color: #10b981; }
.po-warn { color: #f59e0b; }
.po-err  { color: #ef4444; }

@media (max-width: 900px) {
  .po-gen-grid { grid-template-columns: 1fr; }
}

/* ========== 视频画面裁剪（video-crop）拖框覆盖层 ========== */
.video-crop-preview {
  position: relative;
  display: inline-block;
  max-width: 100%;
}
.video-crop-preview video {
  display: block;
  max-width: 100%;
}
.vc-overlay {
  position: absolute;
  inset: 0;
  cursor: crosshair;
  pointer-events: auto;
}
.vc-box {
  position: absolute;
  border: 2px dashed #22c55e;
  background: rgba(34, 197, 94, 0.15);
  box-sizing: border-box;
  pointer-events: none;
}

/* ========== 音视频合并（vma-grid）双 dropzone 布局 ========== */
.vma-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.vma-slot { display: flex; flex-direction: column; gap: 8px; }
@media (max-width: 900px) {
  .vma-grid { grid-template-columns: 1fr; }
}