/* 基础主题变量 */
:root {
  --bg-color: #f7f8fb;                 /* 比 #f5f5f5 更干净 */
  --bg-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --text-color: #0f172a;               /* 比 #222 更清晰 */
  --text-muted: #64748b;
  --border-color: rgba(15, 23, 42, .08); /* 关键：别用 #ddd 这种硬边 */
  --accent-color: #3b82f6;
  --focus-ring: rgba(59, 130, 246, 0.18);
}

body.dark-theme {
  --bg-color: #0b1220;                 /* 更深一点，更高级 */
  --bg-elevated: #0f172a;              /* 建议别用 #1f2933（偏脏） */
  --bg-subtle: #111c2f;
  --text-color: rgba(226, 232, 240, .92);
  --text-muted: rgba(148, 163, 184, .92);
  --border-color: rgba(148, 163, 184, .16);
  --accent-color: #60a5fa;
  --focus-ring: rgba(96, 165, 250, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding-top: 3rem;
  /* 预留头部高度，大约 48px，多一点没关系 */
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
}


/* 总布局 */

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.nav-group{
  background: transparent;
  border: none;
}

.tool-search{
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
}


/* Header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  /* 固定在窗口顶部 */
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}


.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-title {
  font-weight: 600;
  font-size: 1.1rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 日期 + 时间的小胶囊 */
.header-datetime {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  background-color: rgba(148, 163, 184, 0.15);
  color: var(--text-color, #0f172a);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.header-date {
  opacity: 0.9;
}

.header-dot {
  font-size: 0.7rem;
  opacity: 0.6;
}

.header-time {
  font-variant-numeric: tabular-nums;
}

/* 深色模式适配（如果你有 data-theme 或类似开关） */
[data-theme="dark"] .header-datetime {
  background-color: rgba(148, 163, 184, 0.25);
  color: #e5e7eb;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.5);
}

/* 小屏幕适当缩小一点 */
@media (max-width: 600px) {
  .header-datetime {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
  }
}

/* 按钮 */

.icon-button,
.theme-toggle {
  border: none;
  background: none;
  color: var(--text-color);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-button:hover,
.theme-toggle:hover {
  background-color: rgba(148, 163, 184, 0.2);
}

/* 内容布局：侧栏 + 主区域 */

.app-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* Sidebar */

/* ===== Sidebar ===== */

.sidebar {
  min-width: 220px;
  max-width: 260px;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-color);
  padding: 0.9rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: sticky;
  top: 56px;
  /* 如果你的 header 高度不是 56px，可以微调 */
  height: calc(100vh - 56px);
  overflow-y: auto;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--bg-color) 96%, #fff),
    var(--bg-color)
  );
  border-right: 1px solid var(--border-color);
  box-shadow: inset -1px 0 0 rgba(15,23,42,0.03);
}

body.dark-theme .sidebar{
  box-shadow: inset -1px 0 0 rgba(148,163,184,0.06);
}


.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted, #94a3b8);
  padding: 0 0.4rem;
  margin-bottom: 0.15rem;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.nav-item {
  margin: 0;
}

/* 侧边栏链接通用样式 */
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.6rem;
  border-radius: 0.65rem;
  font-size: 0.9rem;
  line-height: 1.3;
  color: var(--text-color, #0f172a);
  text-decoration: none;
  position: relative;
  transition:
    background-color 0.15s ease,
    color 0.15s ease,
    transform 0.08s ease,
    box-shadow 0.15s ease;
}

/* 左侧小色条，做一点视觉引导 */
.nav-link::before {
  content: "";
  width: 4px;
  height: 70%;
  border-radius: 999px;
  background-color: transparent;
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  transition: background-color 0.15s ease;
}

/* hover 效果 */
.nav-link:hover {
  background-color: rgba(148, 163, 184, 0.18);
  transform: translateX(1px);
}

/* 当前激活状态（根据你的 JS，可能是 active 或 is-active，都加上） */
.nav-link.active,
.nav-link.is-active{
  background: color-mix(in srgb, var(--accent-color) 12%, transparent);
}

/* 深色模式下稍微调暗一点（如果你有 data-theme 或 .dark，可以适配） */
[data-theme="dark"] .sidebar {
  border-right-color: rgba(148, 163, 184, 0.25);
}

[data-theme="dark"] .nav-link:hover {
  background-color: rgba(148, 163, 184, 0.15);
}

/* 小屏幕时 sidebar 收窄一点 */
@media (max-width: 900px) {
  .sidebar {
    position: static;
    height: auto;
    min-width: 100%;
    max-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .nav-link {
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
  }

  .nav-link::before {
    display: none;
  }
}

/* ===== Optimal Sidebar Add-ons ===== */

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.sidebar-search {
  position: sticky;
  top: 0;              /* ✅关键：不要用 56px */
  z-index: 5;
  padding: 0.4rem 0 0.6rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid rgba(148, 163, 184, 0.16);
  margin-bottom: 0.35rem;
}


.tool-search {
  width: 100%;
  border: 1px solid var(--border-color);
  background: var(--bg, transparent);
  color: var(--text-color, #0f172a);
  border-radius: 0.8rem;
  padding: 0.55rem 2rem 0.55rem 0.75rem;
  font-size: 0.9rem;
  outline: none;
}

.tool-search:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.45);
}

.tool-search-clear {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--text-muted, #94a3b8);
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
}

.sidebar-search {
  position: relative;
}
.sidebar-search.has-value .tool-search-clear {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted, #94a3b8);
  padding: 0 0.4rem;
  margin-top: 0.15rem;
}

.nav-groups {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-group {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 0.9rem;
  padding: 0.2rem;
  background: rgba(148, 163, 184, 0.06);
}

.nav-group-title {
  list-style: none;
  cursor: pointer;
  user-select: none;
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--text-color, #0f172a);
  padding: 0.45rem 0.55rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-group-title::-webkit-details-marker {
  display: none;
}

.nav-group-title::after {
  content: "▾";
  opacity: 0.6;
  transform: rotate(0deg);
  transition: transform 0.15s ease;
}

.nav-group[open] .nav-group-title::after {
  transform: rotate(180deg);
}

.nav-group .nav-list {
  padding: 0.2rem;
  gap: 0.12rem;
}

.nav-group .nav-link {
  background: transparent;
}

/* 搜索命中高亮（可选） */
.nav-link.search-hit {
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.22);
}

/* Footer */
.sidebar-footer {
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.85rem;
  color: var(--text-muted, #94a3b8);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

/* ===== Mobile: 抽屉式更好（强烈推荐） ===== */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: min(92vw, 340px);
    max-width: none;
    height: calc(100vh - 56px);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    border-right: 1px solid var(--border-color);
    z-index: 50;
  }

  .app.sidebar-open .sidebar {
    transform: translateX(0);
  }

  /* 你原来的移动端把 nav-list 横向排布会更乱，这里直接禁用 */
  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
  }
}


/* Main 内容 */

.main {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  margin: 14px;
  padding: 18px;
}

/* dark 下 shadow 更克制 */
body.dark-theme .main {
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.main h1 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.main p {
  line-height: 1.6;
}

/* Footer */

.app-footer {
  margin-top: auto;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-elevated);
  font-size: 0.85rem;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-link {
  text-decoration: none;
  color: var(--text-color);
  opacity: 0.8;
}

.footer-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* 移动端 */

@media (max-width: 768px) {
  .app-body {
    position: relative;
  }

  .sidebar {
    position: fixed;
    top: 3rem;
    bottom: 2.5rem;
    left: 0;
    transform: translateX(-100%);
    max-width: 80%;
    z-index: 20;
  }

  .sidebar-open .sidebar {
    transform: translateX(0);
  }

  .main {
    padding: 1rem 1rem 2.5rem;
  }
}

/* 菜单按钮只在移动端显示 */

.menu-button {
  display: none;
}

@media (max-width: 768px) {
  .menu-button {
    display: inline-flex;
  }
}


/* ===== JSON Formatter tool layout ===== */

.tool-layout {
  display: flex;
  gap: 1rem;
  align-items: stretch;
  /* 关键：拉齐高度 */
  margin-bottom: 1.5rem;
  flex-wrap: nowrap;
}

.tool-column {
  flex: 1;
  display: flex;
  flex-direction: column;
}


.field-label {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 0.25rem;
  display: block;
}

.code-area,
.code-output {
  width: 100%;
  min-height: 620px;
  /* 可以按自己屏幕高度调 */
  border-radius: 0.5rem;
  padding: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-elevated);
  color: var(--text-color);
  resize: none;
  /* 不允许手动拉伸 */
  flex: 1;
  /* 在列中填满高度 */
  overflow: auto;
}


.code-output {
  white-space: pre-wrap;
  overflow: auto;
}

/* 错误状态 */
.code-output.error {
  color: #b91c1c;
  border-color: #f97373;
  background-color: rgba(248, 113, 113, 0.08);
}

/* 中间竖排按钮区 */

.tool-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  justify-content: flex-start;
  /* 从顶部开始排，不再居中 */
  align-items: stretch;
  margin-top: 1.5rem;
  /* 稍微往下挪一点，对齐上面的 label */
}


.primary-button,
.secondary-button {
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
}

.primary-button {
  background-color: var(--accent-color);
  color: #ffffff;
}

.primary-button:hover {
  filter: brightness(1.05);
}

.secondary-button {
  background-color: transparent;
  color: var(--text-color);
  border-color: var(--border-color);
}

.secondary-button:hover {
  background-color: rgba(148, 163, 184, 0.2);
}

/* 输出头部（label + copy 按钮） */

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
}

.copy-button {
  font-size: 0.9rem;
}

/* 使用指南 */

.usage-section {
  margin-top: 2rem;
}

.usage-section h2 {
  margin-bottom: 0.5rem;
}

.usage-section ol {
  padding-left: 1.25rem;
}

.usage-section li {
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

.usage-section p {
  margin-top: 0.75rem;
  line-height: 1.6;
}

/* 移动端：上下排列 */

@media (max-width: 900px) {
  .tool-layout {
    flex-direction: column;
  }

  .tool-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    justify-content: flex-start;
    /* 从顶部开始排，不再居中 */
    align-items: stretch;
    margin-top: 1.5rem;
    /* 稍微往下挪一点，对齐上面的 label */
  }


  .tool-buttons .primary-button,
  .tool-buttons .secondary-button {
    flex: 0 0 auto;
  }
}


/* ===== JSON viewer with colors & collapsible ===== */

.json-viewer {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.9rem;
  white-space: pre;
}

.json-item {
  display: block;
}

.json-children {
  /* 默认展开 */
}

.json-children.collapsed {
  display: none;
}

.json-toggle {
  display: inline-block;
  width: 1em;
  cursor: pointer;
  user-select: none;
  color: #9ca3af;
}

.json-toggle::before {
  content: "▼";
}

.json-toggle.collapsed::before {
  content: "▶";
}

.json-key {
  color: #2563eb;
  /* 蓝色 key */
}

.json-string {
  color: #16a34a;
  /* 绿色字符串 */
}

.json-number {
  color: #f59e0b;
  /* 橙色数字 */
}

.json-boolean {
  color: #ec4899;
  /* 粉色布尔 */
}

.json-null {
  color: #6b7280;
  /* 灰色 null */
}

.json-bracket {
  color: #9ca3af;
}

.json-comma {
  color: #9ca3af;
}


/* ===== Image to Base64 Tool Layout ===== */

.tool-img-layout {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.tool-img-column {
  flex: 1;
  min-width: 320px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1rem 1.2rem;
}

.tool-title {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.file-input {
  margin-bottom: 0.75rem;
}

.preview-box {
  border: 1px dashed var(--border-color);
  border-radius: 0.5rem;
  background: var(--bg-color);
  min-height: 180px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin-bottom: 0.75rem;
  padding: 0.5rem;
}

.preview-img {
  max-width: 100%;
  max-height: 300px;
  display: none;
}

.placeholder {
  opacity: 0.6;
  font-size: 0.9rem;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.small-copy {
  padding: 0.2rem 0.35rem;
  font-size: 0.85rem;
}

.small-height {
  min-height: 160px;
}

.big-small-height {
  min-height: 60px;
}

.mt-1 {
  margin-top: 0.75rem;
}

.mt-2 {
  margin-top: 1.5rem;
}

.size-info {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 0.75rem;
}



/* ===== Text Notes Tool ===== */

.notes-layout {
  display: flex;
  gap: 1.25rem;
  align-items: stretch;
  margin-top: 0.75rem;
}

.notes-sidebar {
  width: 220px;
  min-width: 200px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.75rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.full-width {
  width: 100%;
}

.notes-list-header {
  font-size: 0.85rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.notes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  overflow-y: auto;
  max-height: 420px;
}

.notes-list-item,
.notes-list-empty {
  padding: 0.35rem 0.4rem;
  border-radius: 0.4rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.notes-list-empty {
  opacity: 0.7;
  cursor: default;
}

.notes-list-item:hover {
  background-color: rgba(148, 163, 184, 0.15);
}

.notes-list-item.active {
  background-color: var(--accent-color);
  color: #ffffff;
}

/* 右侧编辑区域 */

.notes-editor {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.notes-toolbar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.note-title-input {
  flex: 1;
  min-width: 180px;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-elevated);
  color: var(--text-color);
  font-size: 0.95rem;
}

.note-title-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.notes-toolbar-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

/* 复用已有 file-input-label / file-input-hidden 样式 */

.small-button {
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
}

.notes-textarea {
  min-height: 620px;
  flex: 1;
}

/* 响应式 */

@media (max-width: 900px) {
  .notes-layout {
    flex-direction: column;
  }

  .notes-sidebar {
    width: 100%;
    max-width: none;
  }
}


/* ===== JWT Decoder Tool ===== */

.jwt-layout {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.jwt-buttons {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.jwt-error {
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: #b91c1c;
}

.jwt-panels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.jwt-panel {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.5rem 0.6rem;
  display: flex;
  flex-direction: column;
}

.jwt-panel-title {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 0.25rem;
}

/* 复用 code-output 的样式，如果没有可以用你现有的 .code-output */
.jwt-panel .code-output {
  flex: 1;
  margin: 0;
  white-space: pre-wrap;
}

/* 响应式：小屏幕改两列 / 一列 */

@media (max-width: 1100px) {
  .jwt-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .jwt-panels {
    grid-template-columns: minmax(0, 1fr);
  }
}


/* URL encoder specific tweaks */
.url-tool-layout .code-area {
  min-height: 240px;
}

.url-tool-buttons {
  margin-top: 1.5rem;
}

/* ===== UUID Generator ===== */

.uuid-layout {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.uuid-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
}

.uuid-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.uuid-count-input {
  width: 80px;
  padding: 0.3rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-elevated);
  color: var(--text-color);
}

.uuid-checkboxes {
  flex-direction: row;
  align-items: center;
}

.checkbox-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-right: 0.75rem;
  font-size: 0.9rem;
}

.uuid-buttons {
  display: flex;
  gap: 0.5rem;
}

.uuid-output {
  min-height: 220px;
}

/* ===== Base64 Text Tool ===== */

.base64-tool-layout .code-area {
  min-height: 240px;
}

.base64-tool-buttons {
  margin-top: 1.5rem;
}

/* ===== Text Counter Tool ===== */

.text-counter-layout {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 1.25rem;
  align-items: flex-start;
}

.text-counter-input-area {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.text-counter-actions {
  margin-top: 0.25rem;
  display: flex;
  gap: 0.5rem;
}

.text-counter-summary {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 0.75rem 0.9rem;
}

.text-counter-summary-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.text-counter-stats {
  margin: 0;
  padding: 0;
}

.text-counter-stat-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.25rem 0;
  font-size: 0.9rem;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.4);
}

.text-counter-stat-row:last-child {
  border-bottom: none;
}

.text-counter-stat-row dt {
  margin: 0;
  opacity: 0.9;
}

.text-counter-stat-row dd {
  margin: 0;
  font-weight: 600;
}

/* 小屏幕改为上下排布 */
@media (max-width: 900px) {
  .text-counter-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}


/* ===== JSON ↔ CSV Tool ===== */

.json-csv-layout .code-area {
  min-height: 260px;
}

.json-csv-buttons {
  margin-top: 1.5rem;
}

.error-message {
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: #b91c1c;
}


/* ===== Sidebar polish: less borders, clearer hierarchy ===== */

/* 侧栏整体更像独立面板：轻微对比 + 更干净 */
.sidebar {
  background: var(--bg-elevated);
  border-right: 1px solid rgba(148, 163, 184, 0.18);
  padding: 0.85rem 0.75rem;
}

/* 标题更克制一点 */
.sidebar-title,
.section-title {
  letter-spacing: 0.10em;
  color: var(--text-muted, #94a3b8);
}

/* 搜索区：减少边框存在感，像“输入框”而不是“组件” */
.tool-search {
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(148, 163, 184, 0.06);
}
body.dark-theme .tool-search {
  background: rgba(148, 163, 184, 0.08);
  border-color: rgba(148, 163, 184, 0.22);
}

/* ===== 重点：把 nav-group 从“卡片”改成“分组标题 + 缩进列表” ===== */
.nav-groups {
  gap: 0.25rem;
}

/* 去掉每组的外框和卡片背景（丑的根源） */
.nav-group {
  border: none;
  background: transparent;
  padding: 0;
}

/* 分组标题更像 header */
.nav-group-title {
  padding: 0.5rem 0.55rem;
  border-radius: 0.7rem;
  font-weight: 650;
  font-size: 0.9rem;
  color: var(--text-color, #0f172a);
  background: transparent;
  transition: background-color 0.15s ease;
}
.nav-group-title:hover {
  background: rgba(148, 163, 184, 0.12);
}

/* open 的分组标题给一点点底色，强化层级 */
.nav-group[open] .nav-group-title {
  background: rgba(148, 163, 184, 0.10);
}

/* 右侧箭头更精致（可选） */
.nav-group-title::after {
  content: "⌄";
  opacity: 0.55;
  transform: rotate(0deg);
  transition: transform 0.15s ease, opacity 0.15s ease;
  font-size: 0.95rem;
}
.nav-group[open] .nav-group-title::after {
  transform: rotate(180deg);
  opacity: 0.75;
}

/* 子列表：缩进 + 竖向引导线（立刻高级） */
.nav-group .nav-list {
  padding: 0.15rem 0.2rem 0.25rem 0.65rem;
  margin-left: 0.55rem;
  border-left: 1px solid rgba(148, 163, 184, 0.18);
  gap: 0.1rem;
}

/* 导航项：更像“列表项”而不是“按钮” */
.nav-link {
  padding: 0.42rem 0.6rem 0.42rem 0.75rem;
  border-radius: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-color, #0f172a);
  transition: background-color 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
}

/* 去掉位移，换成更稳的 hover */
.nav-link:hover {
  transform: none; /* 关键：干掉 translateX */
  background: rgba(148, 163, 184, 0.14);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.18);
}

/* 左色条：更贴边一点更“导航” */
.nav-link::before {
  left: 2px;
  width: 3px;
  height: 62%;
  border-radius: 999px;
}

/* active：更清爽、少按钮感 */
.nav-link.active,
.nav-link.is-active {
  background: rgba(59, 130, 246, 0.10);
  color: var(--accent-color, #2563eb);
  font-weight: 650;
  box-shadow: none;
}
.nav-link.active::before,
.nav-link.is-active::before {
  background: var(--accent-color, #2563eb);
}

/* 键盘可访问性（高级感也来自这里） */
.nav-link:focus-visible,
.nav-group-title:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.22);
}

/* 深色模式 hover/线条更柔一点 */
body.dark-theme .nav-group .nav-list {
  border-left-color: rgba(148, 163, 184, 0.22);
}
body.dark-theme .nav-link:hover {
  background: rgba(148, 163, 184, 0.10);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.16);
}

/* 侧栏滚动条也影响“精致感”（可选） */
.sidebar {
  scrollbar-gutter: stable;
}
.sidebar::-webkit-scrollbar {
  width: 10px;
}
.sidebar::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: content-box;
}

.nav-link:hover::after{ opacity: .6; }
.nav-link.active::after{ opacity: .9; background: var(--accent-color, #2563eb); }



/* json diff */
/* JSON Diff */
.jsondiff-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.jsondiff-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.jsondiff-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  opacity: .9;
  font-size: 14px;
}

.jsondiff-inputs {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 980px) {
  .jsondiff-inputs {
    grid-template-columns: 1fr 1fr;
  }
}

.jsondiff-error {
  margin-top: 8px;
  color: #ff6b6b;
  white-space: pre-wrap;
  min-height: 18px;
}

.jsondiff-result {
  margin-top: 14px;
}

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

.jsondiff-meta {
  opacity: .9;
  font-size: 14px;
}

.jsondiff-ok {
  padding: 10px 12px;
  border-radius: 12px;
}

.jsondiff-item {
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
}

.jsondiff-item-head {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.jsondiff-path {
  font-size: 12px;
  opacity: .9;
}

.jsondiff-item-body {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 980px) {
  .jsondiff-item-body {
    grid-template-columns: 1fr 1fr;
  }
}

.jsondiff-col-title {
  font-size: 12px;
  opacity: .8;
  margin-bottom: 6px;
}

.jsondiff-pre {
  overflow: auto;
}

.jsondiff-badge {
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.15);
}

/* 仅 JSON Diff 页面放宽 main */
.jsondiff-page {
  max-width: none;   /* 如果 main 有 max-width，这句会解除 */
  width: 100%;
}

.jd-code-area {
  min-height: 620px;
}


/* JSON Diff: 目录（锚点导航） */
.jsondiff-toc {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

/* 目录项：增加“卡片感”，更符合深色背景 */
.jsondiff-toc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;

  text-decoration: none;

  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-color: rgba(120, 130, 150, 0.35);
  transition: background .15s ease, border-color .15s ease, transform .05s ease;
}

.jsondiff-toc-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(120, 130, 150, 0.55);
}

.jsondiff-toc-item:active {
  transform: translateY(1px);
}

/* badge：更柔和一些，别太“硬” */
.jsondiff-toc-badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;

  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.88);

  opacity: 1;
}

/* path：稍微降一点，让 badge 成为视觉焦点 */
.jsondiff-toc-path {
  font-size: 12px;
  opacity: 0.85;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 可选：按类型上色（推荐） ==========
   你现在目录 badge 没有类型 class 的话，
   先看下面 JS 改法（很小）再启用这段 */
.jsondiff-toc-badge.jsondiff-chg {
  background: rgba(180, 120, 255, 0.14);
  border-color: rgba(120, 130, 150, 0.45);
  color: rgba(225, 205, 255, 0.96);
}

.jsondiff-toc-badge.jsondiff-add {
  background: rgba(80, 200, 160, 0.14);
  border-color: rgba(80, 200, 160, 0.45);
  color: rgba(185, 245, 225, 0.96);
}

.jsondiff-toc-badge.jsondiff-del {
  background: rgba(255, 120, 120, 0.14);
  border-color: rgba(255, 120, 120, 0.45);
  color: rgba(255, 205, 205, 0.96);
}

/* JSON Diff: 定位高亮（用紫/白，避免蓝色糊在背景里） */
.jsondiff-item.is-target {
  outline: 2px solid rgba(90, 100, 120, 0.55);
  box-shadow: 0 0 0 6px rgba(90, 100, 120, 0.12);
  /* border-color: rgba(255, 255, 255, 0.14); */
}

/* 高亮时 path 更醒目一点 */
.jsondiff-item.is-target .jsondiff-path {
  border-color: rgba(120, 130, 150, 0.30);
}

/* ✅ 强制让最外层 diff item 有边框（dark/light 都能看见） */
.jsondiff-item {
  border: 1px solid rgba(120, 130, 150, 0.30) !important;
  border-radius: 14px;
  background: transparent; /* 保持你现在风格，不额外加底色 */
}

/* hover 时更明显一点（可选） */
.jsondiff-item:hover {
  border-color: rgba(120, 130, 150, 0.45) !important;
}


.header-left { display:flex; align-items:center; gap:10px; }

.brand { display:flex; align-items:center; gap:10px; }

.brand-mark{
  width:30px; height:30px;
  display:grid; place-items:center;
  border-radius: 12px;
  border: 1px solid rgba(120,130,150,.25);
  background: rgba(255,255,255,.04);
}
.brand-mark svg { opacity: .9; }

/* Revenue-focused tool pages */
.wide-main {
  max-width: 1180px;
  width: 100%;
}

.tool-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
  padding: 18px 0 10px;
  border-bottom: 1px solid var(--border-color);
}

.compact-hero {
  padding-top: 8px;
}

.tool-hero h1 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-color);
}

.tool-subtitle {
  max-width: 760px;
  margin: 10px 0 0;
  color: color-mix(in srgb, var(--text-color) 74%, transparent);
  line-height: 1.6;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  min-width: 190px;
}

.hero-metrics span,
.feature-kicker {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 5px 10px;
  background: var(--bg-elevated);
  color: color-mix(in srgb, var(--text-color) 80%, transparent);
  font-size: 0.78rem;
  font-weight: 650;
}

.featured-tools {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin: 0 0 18px;
}

.feature-card {
  display: flex;
  min-height: 138px;
  flex-direction: column;
  gap: 9px;
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-elevated);
  color: var(--text-color);
  text-decoration: none;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--accent-color) 45%, var(--border-color));
  box-shadow: 0 10px 24px rgba(15, 23, 42, .08);
  transform: translateY(-1px);
}

.feature-card strong {
  font-size: 1rem;
}

.feature-card span:last-child {
  color: color-mix(in srgb, var(--text-color) 72%, transparent);
  line-height: 1.45;
}

.generator-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  align-items: start;
}

.tool-panel {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-elevated);
  padding: 16px;
}

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

.field-block {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.select-input,
.text-input {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-color);
  color: var(--text-color);
  font: inherit;
  min-height: 42px;
  padding: 0 12px;
}

.range-input {
  width: 100%;
  accent-color: var(--accent-color);
}

.compact-area {
  min-height: 110px;
}

.output-tall {
  min-height: 360px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

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

.stat-card {
  display: flex;
  min-height: 108px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  background: var(--bg-color);
}

.stat-card span {
  color: color-mix(in srgb, var(--text-color) 70%, transparent);
  font-size: .86rem;
}

.stat-card strong {
  overflow-wrap: anywhere;
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.15;
}

.compact-note {
  margin-top: 16px;
  padding: 0;
  background: transparent;
  border: none;
}

@media (max-width: 920px) {
  .tool-hero,
  .generator-grid {
    grid-template-columns: 1fr;
  }

  .tool-hero {
    flex-direction: column;
  }

  .hero-metrics {
    justify-content: flex-start;
  }

  .featured-tools,
  .form-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Modernized shared tool UI */
.main {
  border-radius: 8px;
}

.main > h1 {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.tool-layout,
.text-counter-layout,
.uuid-layout,
.tool-img-layout,
.jwt-layout,
.jsondiff-layout,
.json-csv-layout,
.notes-layout {
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-elevated) 88%, var(--bg-subtle));
}

.tool-column,
.tool-img-column,
.text-counter-input-area,
.text-counter-summary,
.uuid-options,
.panel,
.jwt-panel,
.jsondiff-panel,
.notes-sidebar,
.notes-editor {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-elevated);
  padding: 14px;
}

.code-area,
.code-output {
  min-height: clamp(280px, 48vh, 520px);
  border-radius: 8px;
  background: var(--bg-subtle);
  line-height: 1.55;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}

.small-height {
  min-height: clamp(160px, 28vh, 280px);
}

.big-small-height {
  min-height: 84px;
}

.code-area:focus,
.select-input:focus,
.text-input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent-color) 55%, var(--border-color));
  box-shadow: 0 0 0 4px var(--focus-ring);
}

.tool-buttons {
  min-width: 116px;
}

.primary-button,
.secondary-button {
  min-height: 40px;
  border-radius: 8px;
  font-weight: 650;
  transition: transform .12s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease;
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.primary-button {
  box-shadow: 0 8px 18px color-mix(in srgb, var(--accent-color) 26%, transparent);
}

.secondary-button {
  background-color: var(--bg-elevated);
}

.output-header {
  min-height: 32px;
}

.copy-button {
  min-width: 34px;
  min-height: 34px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-subtle);
}

.field-label {
  color: var(--text-muted);
  font-weight: 650;
  opacity: 1;
}

.usage-section {
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
}

.usage-section h2,
.usage-section h3 {
  color: var(--text-color);
}

.usage-section p,
.usage-section li {
  color: color-mix(in srgb, var(--text-color) 78%, transparent);
}

.panel-title {
  margin: 0 0 12px;
  font-size: 1rem;
}

.serp-preview {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-subtle);
  padding: 14px;
}

.serp-url {
  color: #15803d;
  font-size: .86rem;
  margin-bottom: 5px;
  overflow-wrap: anywhere;
}

.serp-title {
  color: #1d4ed8;
  font-size: 1.12rem;
  line-height: 1.3;
  margin-bottom: 5px;
}

body.dark-theme .serp-title {
  color: #93c5fd;
}

body.dark-theme .serp-url {
  color: #86efac;
}

.serp-description {
  color: color-mix(in srgb, var(--text-color) 74%, transparent);
  line-height: 1.45;
}

.meta-score-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.meta-check {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  background: var(--bg-elevated);
}

.meta-check span {
  color: var(--text-muted);
  font-size: .8rem;
}

.meta-check strong {
  font-size: .95rem;
}

.meta-output {
  min-height: 260px;
}

.tool-img-layout {
  gap: 16px;
}

.tool-img-column {
  min-width: min(320px, 100%);
}

.preview-box {
  border-radius: 8px;
  background: var(--bg-subtle);
}

.compressor-preview {
  min-height: 300px;
}

.compressor-preview .preview-img {
  max-height: 520px;
}

.uuid-count-input,
.note-title-input {
  border-radius: 8px;
  background: var(--bg-subtle);
}

.text-counter-stat-row {
  padding: 10px 0;
}

.text-counter-stat-row dd {
  font-weight: 750;
}

.jsondiff-head,
.jwt-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-elevated);
}

.jsondiff-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.jsondiff-option {
  color: var(--text-muted);
}

.jwt-buttons {
  justify-content: flex-start;
}

.jwt-panel-title,
.text-counter-summary-title,
.tool-title {
  color: var(--text-color);
  font-weight: 750;
}

@media (max-width: 900px) {
  .tool-layout,
  .text-counter-layout,
  .uuid-layout,
  .tool-img-layout,
  .jwt-layout,
  .jsondiff-layout,
  .json-csv-layout,
  .notes-layout {
    padding: 10px;
  }

  .tool-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    margin-top: 0;
  }

  .meta-score-grid {
    grid-template-columns: 1fr;
  }
}