/* ===== 基础变量 ===== */
:root {
  --bg: #f6f7f9;
  --bg-card: #ffffff;
  --bg-soft: #f0f2f5;
  --bg-hover: #ebedf0;
  --border: #e4e7eb;
  --text: #1f2329;
  --text-soft: #4e5969;
  --text-mute: #86909c;
  --primary: #165dff;
  --primary-soft: #e8f3ff;
  --primary-hover: #0e42d2;
  --success: #00b42a;
  --success-soft: #e8ffea;
  --warning: #ff7d00;
  --warning-soft: #fff7e8;
  --danger: #f53f3f;
  --danger-soft: #ffece8;
  --code-bg: #f7f8fa;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
  --sidebar-w: 240px;
  --header-h: 60px;
  /* 动效令牌：弹性缓出 + 弹簧曲线 + 分层时长 */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 0.12s;
  --t-mid: 0.2s;
  --t-slow: 0.3s;
}
[data-theme="dark"] {
  --bg: #0f0f12;
  --bg-card: #1a1a1e;
  --bg-soft: #222227;
  --bg-hover: #2a2a30;
  --border: #2a2a32;
  --text: #ececee;
  --text-soft: #b8b8be;
  --text-mute: #7a7a82;
  --primary: #5a8cff;
  --primary-soft: #1c2a45;
  --primary-hover: #7aa2ff;
  --success: #23c343;
  --success-soft: #16241a;
  --warning: #ff9a2e;
  --warning-soft: #2e251a;
  --danger: #f76560;
  --danger-soft: #2e1a1a;
  --code-bg: #141417;
  --shadow: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.55);
}

/* ===== Reset ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { color: var(--primary); text-decoration: none; }

/* 键盘焦点环（无障碍）：outline 自动跟随元素自身圆角 */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.input:focus-visible, .textarea:focus-visible, .select:focus-visible,
.search-box input:focus-visible { outline-offset: 0; }

/* ===== 布局 ===== */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--header-h) 1fr;
  grid-template-areas: "logo header" "sidebar main";
  height: 100vh;
}
.logo-area {
  grid-area: logo;
  display: flex; align-items: center; gap: 10px;
  padding: 0 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-weight: 700; font-size: 16px;
}
.logo-area .logo-mark {
  width: 28px; height: 28px; border-radius: 7px;
  background: linear-gradient(135deg, #165dff, #4080ff);
  color: #fff; display: grid; place-items: center;
  font-size: 14px; font-weight: 800;
}
.header {
  grid-area: header;
  display: flex; align-items: center; gap: 12px;
  padding: 0 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  flex-wrap: nowrap;
  min-width: 0;
}
.header > * { flex-shrink: 0; }
.header > .search-box { flex: 1 1 0; }
.search-box {
  position: relative;
  max-width: 480px;
}
.search-box input {
  width: 100%; height: 36px;
  padding: 0 36px 0 12px;
  background: var(--bg-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  outline: none; transition: border-color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
}
.search-box input:focus {
  border-color: var(--primary); background: var(--bg-card);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
}
.search-box::before {
  content: "🔍"; position: absolute; right: 12px; top: 50%;
  transform: translateY(-50%); font-size: 14px; opacity: 0.6;
}
.header-actions { display: flex; gap: 8px; margin-left: auto; }
.home-clock {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 3px;
  user-select: none; flex-shrink: 0;
  margin-left: 16px;
}
.home-clock .hc-row {
  display: flex; align-items: baseline; gap: 10px;
}
.home-clock #clockDisplay {
  font-size: 22px; font-weight: 700; color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
}
.home-clock .date {
  font-size: 13px; color: var(--text-mute);
  font-variant-numeric: tabular-nums;
}
.home-clock .ts {
  font-size: 12px; color: var(--primary);
  font-variant-numeric: tabular-nums;
  cursor: pointer; transition: opacity var(--t-fast) var(--ease-out);
  opacity: 0.7;
}
.home-clock .ts:hover { opacity: 1; text-decoration: underline; }
.icon-btn {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: grid; place-items: center;
  background: var(--bg-soft); transition: background var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out);
  font-size: 16px;
}
.icon-btn:hover { background: var(--bg-hover); }
.icon-btn:active { transform: scale(0.92); }

.sidebar {
  grid-area: sidebar;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
}
.nav-group { padding: 8px 0; }
.nav-group-title {
  padding: 6px 20px;
  font-size: 11px; font-weight: 600;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex; align-items: center; gap: 6px;
}
/* 分组标题彩色圆点：与首页卡片色系一致 */
.nav-group-title::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--group-accent, var(--text-mute));
  flex-shrink: 0;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 20px;
  color: var(--text-soft);
  cursor: pointer; transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-mid) var(--ease-out);
  border-left: 3px solid transparent;
  font-size: 13px;
}
.nav-item:hover { background: var(--bg-soft); color: var(--text); }
/* active 态跟随分组色系（无分组的首页项保持主色蓝） */
.nav-item.active {
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 10%, transparent);
  color: var(--group-accent, var(--primary));
  border-left-color: var(--group-accent, var(--primary));
  font-weight: 500;
}
[data-theme="dark"] .nav-item.active {
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 16%, transparent);
  color: color-mix(in srgb, var(--group-accent, var(--primary)) 60%, white);
}
.nav-item .icon { width: 18px; text-align: center; font-size: 14px; }
.nav-item.search-highlight { background: #fff8e6; }
[data-theme="dark"] .nav-item.search-highlight { background: #3a3020; }

.main {
  grid-area: main;
  overflow-y: auto;
  padding: 24px;
  /* 顶部主色光晕：随主题变量自动适配明暗 */
  background:
    radial-gradient(ellipse 70% 40% at 50% 0%,
      color-mix(in srgb, var(--primary) 6%, transparent), transparent 70%);
  background-repeat: no-repeat;
}
.tool-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.tool-title { font-size: 20px; font-weight: 700; }
.tool-desc { color: var(--text-mute); font-size: 13px; margin-top: 2px; }
/* 工具页图标徽章：色系与首页/侧边栏一致 */
.tool-badge {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 12%, transparent);
  color: var(--group-accent, var(--primary));
  font-size: 17px;
  margin-right: 10px;
  vertical-align: -8px;
}
[data-theme="dark"] .tool-badge {
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 24%, transparent);
  color: color-mix(in srgb, var(--group-accent, var(--primary)) 65%, white);
}

/* ===== 组件 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 16px;
  transition: border-color var(--t-mid) var(--ease-out);
}
.card:hover { border-color: color-mix(in srgb, var(--primary) 18%, var(--border)); }
/* 暗色主题：1px 内发光提亮卡片上缘，增加层次 */
[data-theme="dark"] .card {
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,0.04);
}
.btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  font-size: 13px; font-weight: 500;
  transition: background var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { background: var(--bg-hover); }
.btn:active { transform: scale(0.96); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-hover); box-shadow: 0 2px 8px color-mix(in srgb, var(--primary) 35%, transparent); }
.btn.primary:active { box-shadow: none; }
.btn.success { background: var(--success); color: #fff; border-color: var(--success); }
.btn.success:active { box-shadow: none; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--bg-soft); }
.btn.sm { padding: 5px 10px; font-size: 12px; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

.field { margin-bottom: 14px; }
.field-label {
  display: block; margin-bottom: 6px;
  font-size: 12px; color: var(--text-soft); font-weight: 500;
}
.input, .textarea, .select {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  outline: none; transition: border-color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
  color: var(--text);
}
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--primary);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 15%, transparent);
}
.textarea {
  font-family: "SF Mono", "Monaco", "Consolas", monospace;
  font-size: 13px;
  resize: vertical;
  min-height: 160px;
  line-height: 1.5;
}
.textarea.lg { min-height: 280px; }
.textarea.sm { min-height: 100px; }
.textarea.gen { min-height: 120px; max-height: 300px; }

.row { display: flex; gap: 12px; }
.row > * { flex: 1; }

.toast {
  position: fixed; top: 80px; left: 50%;
  transform: translateX(-50%) translateY(-24px) scale(0.95);
  background: var(--text); color: var(--bg-card);
  padding: 10px 24px; border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  transition: transform var(--t-slow) var(--ease-spring), opacity var(--t-mid) var(--ease-out);
  opacity: 0; z-index: 1000;
  font-size: 13px;
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0) scale(1); opacity: 1; }
.toast.success { background: var(--success); color: #fff; }
.toast.error { background: var(--danger); color: #fff; }

.output-box {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: "SF Mono", "Monaco", "Consolas", monospace;
  font-size: 13px;
  white-space: pre-wrap; word-break: break-all;
  min-height: 60px;
  max-height: 400px; overflow: auto;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}
.output-box.error { color: var(--danger); }
.output-box.empty { color: var(--text-mute); font-style: italic; border-style: dashed; }

.tag {
  display: inline-block;
  padding: 2px 8px; border-radius: 4px;
  font-size: 11px; font-weight: 500;
  background: var(--bg-soft); color: var(--text-soft);
}
.tag.success { background: var(--success-soft); color: var(--success); }
.tag.danger { background: var(--danger-soft); color: var(--danger); }

.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th { color: var(--text-soft); font-weight: 600; font-size: 12px; }
.table td.mono { font-family: monospace; }
.table tbody tr { transition: background var(--t-fast) var(--ease-out); }
.table tbody tr:hover { background: color-mix(in srgb, var(--group-accent, var(--primary)) 4%, transparent); }

.checkbox-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.checkbox-row input { width: 16px; height: 16px; }

.hint {
  padding: 10px 12px;
  background: var(--primary-soft);
  border-radius: var(--radius-sm);
  font-size: 12px; color: var(--text-soft);
  margin-bottom: 12px;
}
.hint.warning { background: var(--warning-soft); }
.hint.danger { background: var(--danger-soft); }

.color-preview {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.qrcode-box {
  display: grid; place-items: center;
  padding: 20px; min-height: 200px;
}
.qrcode-box img, .qrcode-box canvas { border-radius: var(--radius-sm); }

.copy-btn {
  position: absolute; top: 8px; right: 8px;
  padding: 6px 16px; font-size: 13px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out);
  font-weight: 500; cursor: pointer; opacity: 1;
}
.copy-btn:active { transform: scale(0.94); }
.textarea-wrap { position: relative; }
.textarea-wrap .copy-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-mute); }
::-webkit-scrollbar-track { background: transparent; }

/* 首页 */
.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
/* 分组主题色系（Arco 色板，全局复用）：JSON 蓝 / 编码青 / 证件紫 / 加密红 / 文本绿 / 其他橙 */
.g-json   { --group-accent: #165dff; }
.g-encode { --group-accent: #0fc6c2; }
.g-id     { --group-accent: #722ed1; }
.g-crypto { --group-accent: #f53f3f; }
.g-text   { --group-accent: #00b42a; }
.g-misc   { --group-accent: #ff7d00; }
.home-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  cursor: pointer;
  transition: transform var(--t-mid) var(--ease-out), box-shadow var(--t-mid) var(--ease-out), border-color var(--t-mid) var(--ease-out);
  box-shadow: var(--shadow);
  animation: card-in 0.45s var(--ease-out) backwards;
}
/* 交错入场：8 张一组循环延迟，总延迟上限 280ms */
.home-card:nth-child(8n+1) { animation-delay: 0ms; }
.home-card:nth-child(8n+2) { animation-delay: 40ms; }
.home-card:nth-child(8n+3) { animation-delay: 80ms; }
.home-card:nth-child(8n+4) { animation-delay: 120ms; }
.home-card:nth-child(8n+5) { animation-delay: 160ms; }
.home-card:nth-child(8n+6) { animation-delay: 200ms; }
.home-card:nth-child(8n+7) { animation-delay: 240ms; }
.home-card:nth-child(8n+8) { animation-delay: 280ms; }
@keyframes card-in {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.home-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--group-accent, var(--primary)) 14%, rgba(0,0,0,0.12));
  border-color: color-mix(in srgb, var(--group-accent, var(--primary)) 45%, var(--border));
}
.home-card:active { transform: translateY(-1px) scale(0.985); }
.home-card .icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 12%, transparent);
  color: var(--group-accent, var(--primary));
  display: grid; place-items: center; font-size: 18px;
  margin-bottom: 10px;
  transition: transform var(--t-mid) var(--ease-spring);
}
/* 暗色主题：提亮 accent 保证图标可读性 */
[data-theme="dark"] .home-card .icon {
  background: color-mix(in srgb, var(--group-accent, var(--primary)) 24%, transparent);
  color: color-mix(in srgb, var(--group-accent, var(--primary)) 65%, white);
}
.home-card:hover .icon { transform: scale(1.12) rotate(-4deg); }
.home-card .title { font-weight: 600; margin-bottom: 4px; }
.home-card .desc { font-size: 12px; color: var(--text-mute); }

/* 用户偏好减少动效：关闭入场动画与弹性位移 */
@media (prefers-reduced-motion: reduce) {
  .home-card { animation: none; }
  .home-card:hover, .home-card:active { transform: none; }
  .home-card .icon { transition: none; }
  .toast { transition: opacity var(--t-fast) var(--ease-out); }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* 世界时间城市卡片 */
.wt-city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.wt-city {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.wt-city-head {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 8px;
}
.wt-city-time {
  font-size: 22px; font-weight: 700;
  font-variant-numeric: tabular-nums; letter-spacing: 1.5px;
  margin-bottom: 2px;
}
.wt-city-date {
  font-size: 12px; color: var(--text-mute);
}

.footer {
  text-align: center; padding: 20px 0 16px;
  color: var(--text-mute); font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

/* ===== Language Select ===== */
.lang-select {
  padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg-soft); color: var(--text); font-size: 13px;
  cursor: pointer; outline: none;
}
.lang-select:hover { border-color: var(--primary); }
.lang-select option { background: var(--bg-card); }

/* ===== 响应式（置于文件末尾，确保覆盖上方基础样式） ===== */
/* 移动端 */
@media (max-width: 768px) {
  /* ===== 布局 ===== */
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: 52px 1fr;
    grid-template-areas: "header" "main";
  }
  .logo-area { display: none; }

  /* ===== Header ===== */
  .header { padding: 0 12px; gap: 8px; }
  #menuBtn { display: flex !important; }
  .search-box { flex: 1; max-width: none; }
  .search-box input { font-size: 15px; } /* 防止 iOS 缩放 */
  .header-actions { gap: 4px; }

  /* ===== Sidebar 移动端弹出层（玻璃拟态） ===== */
  .sidebar {
    display: flex; flex-direction: column;
    position: fixed; top: 52px; left: 0; bottom: 0; z-index: 500;
    width: 260px; max-width: 80vw;
    transform: translateX(-100%);
    transition: transform 0.28s var(--ease-out);
    box-shadow: var(--shadow-lg);
    border-right: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg-card) 86%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  .sidebar.open { transform: translateX(0); }
  /* 遮罩 */
  .sidebar-backdrop {
    display: none;
    position: fixed; top: 52px; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.35); z-index: 499;
  }
  .sidebar-backdrop.show { display: block; }

  /* ===== Main ===== */
  .main { padding: 16px 12px; }

  /* ===== Row & Card ===== */
  .row { flex-direction: column; }
  .card { padding: 14px; border-radius: var(--radius); }
  .home-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .wt-city-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; }
  .wt-city { padding: 10px; }
  .wt-city-time { font-size: 18px; }
  .home-card { padding: 14px; }
  .tool-header { flex-direction: column; align-items: flex-start; gap: 6px; }
  .home-clock { margin-left: 0; margin-top: 4px; }

  /* ===== 表格 ===== */
  .table { font-size: 12px; }
  .table th, .table td { padding: 8px 10px; }

  /* ===== 按钮 ===== */
  .btn { padding: 6px 12px; font-size: 12px; }
  .btn.sm { padding: 4px 8px; font-size: 11px; }
  .btn-group { gap: 6px; }
  .icon-btn { width: 32px; height: 32px; font-size: 14px; }

  /* ===== 输入框 ===== */
  .input, .select { font-size: 15px; padding: 8px 10px; }

  /* ===== Toast ===== */
  .toast { top: 60px; left: 16px; right: 16px; transform: translateX(0) translateY(-24px) scale(0.95); font-size: 12px; padding: 8px 16px; text-align: center; }
  .toast.show { transform: translateX(0) translateY(0) scale(1); }

  /* ===== 邮编结果卡片 ===== */
  #pcReverseResultList > div, #pcForwardResultList > div {
    flex-direction: column; align-items: flex-start; gap: 8px;
    padding: 12px 14px;
  }
  #pcReverseResultList > div > div:last-child,
  #pcForwardResultList > div > div:last-child {
    display: flex; align-items: center; gap: 12px; width: 100%;
  }
}

/* 平板端 769-1024 */
@media (min-width: 769px) and (max-width: 1024px) {
  .app { grid-template-columns: 200px 1fr; }
  .home-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}