:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2733;
  --muted: #6b7686;
  --border: #e3e8f0;
  --primary: #3b6cf6;
  --primary-hover: #2c58d8;
  --green: #1f9d5b;
  --green-bg: #e7f7ee;
  --red: #d6453d;
  --red-bg: #fdecea;
  --amber: #c47d12;
  --amber-bg: #fdf3e2;
  --code-bg: #f3f5f9;
  --shadow: 0 6px 24px rgba(31, 39, 51, 0.08);
}

[data-theme="dark"] {
  --bg: #0f141b;
  --card: #161d27;
  --text: #e6ebf2;
  --muted: #93a0b4;
  --border: #283241;
  --primary: #5b86ff;
  --primary-hover: #7a9dff;
  --green: #36c281;
  --green-bg: #11271d;
  --red: #ff6b62;
  --red-bg: #2a1513;
  --amber: #e0a23a;
  --amber-bg: #2a2110;
  --code-bg: #1d2632;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* 粘性头部 + 主标签导航 */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  max-width: 920px;
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; flex: 1; }
.logo-link { display: inline-flex; align-items: center; line-height: 0; }
.logo-img { height: 32px; width: auto; max-width: 120px; object-fit: contain; display: block; border-radius: 8px; transition: opacity .15s; flex-shrink: 0; }
.logo-link:hover .logo-img { opacity: .8; }
.brand h1 { font-size: 19px; margin: 0; }
.subtitle { margin: 0; font-size: 12px; color: var(--muted); }
.icon-btn { padding: 8px 12px; font-size: 18px; line-height: 1; }

.main-nav {
  display: flex;
  gap: 4px;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 16px 8px;
}
.nav-tab {
  flex: 1;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 8px 12px;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color .15s, border-color .15s;
}
.nav-tab:hover { color: var(--text); }
.nav-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.nav-panel { display: none; }
.nav-panel.active { display: block; animation: fade .18s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.container { max-width: 920px; margin: 0 auto; padding: 16px 24px 48px; }

.search-card, .batch-card, .result-area {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.lookup-form { display: flex; gap: 10px; }
.domain-input {
  flex: 1;
  padding: 13px 16px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
.domain-input:focus { border-color: var(--primary); }

.primary-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.primary-btn:hover { background: var(--primary-hover); }
.primary-btn.small { padding: 9px 16px; font-size: 14px; }
.primary-btn:disabled { opacity: .6; cursor: not-allowed; }

.ghost-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 16px;
  cursor: pointer;
  font-size: 14px;
}
.ghost-btn:hover { border-color: var(--primary); }

.quick-examples { margin-top: 12px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.chip {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }

/* 概览 */
.overview { margin-bottom: 18px; }
.ov-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.ov-domain { font-size: 22px; font-weight: 700; word-break: break-all; }
.badge {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.badge.green { background: var(--green-bg); color: var(--green); }
.badge.red { background: var(--red-bg); color: var(--red); }
.badge.amber { background: var(--amber-bg); color: var(--amber); }

.ov-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.ov-item { background: var(--code-bg); border-radius: 10px; padding: 12px 14px; }
.ov-item .k { font-size: 12px; color: var(--muted); }
.ov-item .v { font-size: 15px; font-weight: 600; word-break: break-all; }

/* 标签页 */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.tab {
  background: none; border: none; padding: 10px 14px; cursor: pointer;
  color: var(--muted); font-size: 14px; font-weight: 600;
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* WHOIS 卡片 */
.whois-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.info-card { border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.info-card h3 { margin: 0 0 8px; font-size: 14px; color: var(--muted); }
.info-card .body { font-size: 14px; }
.info-card .body div { margin: 2px 0; word-break: break-all; }
.status-list { display: flex; flex-wrap: wrap; gap: 6px; }
.status-tag { background: var(--code-bg); border-radius: 6px; padding: 2px 8px; font-size: 12px; }

/* DNS */
.dns-controls { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.dns-controls label { font-size: 14px; color: var(--muted); }
#dnsType {
  padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 14px;
}
.dns-result table { width: 100%; border-collapse: collapse; font-size: 14px; }
.dns-result th, .dns-result td {
  text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border);
  word-break: break-all;
}
.dns-result th { color: var(--muted); font-weight: 600; background: var(--code-bg); }
.dns-result .type-pill {
  background: var(--primary); color: #fff; border-radius: 6px;
  padding: 1px 8px; font-size: 12px; font-weight: 700;
}

/* 批量模式切换 */
.mode-switch { display: flex; gap: 6px; background: var(--code-bg); padding: 4px; border-radius: 10px; margin-bottom: 14px; width: fit-content; }
.mode-btn {
  background: transparent; border: none; padding: 8px 18px; border-radius: 8px;
  cursor: pointer; font-size: 14px; font-weight: 600; color: var(--muted);
}
.mode-btn.active { background: var(--card); color: var(--primary); box-shadow: 0 1px 4px rgba(0,0,0,.12); }

/* 前缀生成表单:双列网格,更紧凑 */
.prefix-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pf-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.pf-row.pf-row-wide { grid-column: 1 / -1; }
.pf-row > label { flex: 0 0 84px; font-size: 14px; color: var(--muted); }
.pf-row input, .pf-row select {
  padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 14px; outline: none; flex: 1; min-width: 120px;
}
.pf-row input { flex: 1; min-width: 120px; }
.pf-row input:focus, .pf-row select:focus { border-color: var(--primary); }
.tld-chips { display: flex; gap: 6px; }
.batch-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.batch-head h2 { margin: 0; font-size: 18px; }

.preview-box {
  margin-top: 14px; padding: 12px 14px; border-radius: 10px;
  background: var(--code-bg); font-size: 13px; color: var(--muted);
}
.preview-box .warn { color: var(--amber); font-weight: 600; margin-top: 4px; }

/* 原始 JSON */
.raw-json { margin-top: 14px; }
.raw-json summary {
  cursor: pointer; font-size: 13px; font-weight: 600; color: var(--primary);
  padding: 8px 0; user-select: none;
}
.raw-json pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; font-size: 12px; line-height: 1.5;
  max-height: 420px; overflow: auto; white-space: pre-wrap; word-break: break-all;
}

.muted { color: var(--muted); }

/* 结果工具栏:统计 + 搜索 + 筛选 + 导出 */
.result-toolbar { margin-top: 18px; border-top: 1px solid var(--border); padding-top: 16px; }
.stat-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(84px, 1fr)); gap: 10px; margin-bottom: 14px; }
.stat-card {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 12px; text-align: center;
}
.stat-card .n { font-size: 20px; font-weight: 700; line-height: 1.25; }
.stat-card .l { font-size: 12px; color: var(--muted); margin-top: 2px; }
.stat-card.green { background: var(--green-bg); border-color: transparent; }
.stat-card.green .n { color: var(--green); }
.stat-card.red { background: var(--red-bg); border-color: transparent; }
.stat-card.red .n { color: var(--red); }
.stat-card.amber { background: var(--amber-bg); border-color: transparent; }
.stat-card.amber .n { color: var(--amber); }

.table-tools { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.search-wrap { position: relative; flex: 1; min-width: 190px; }
.search-wrap input {
  width: 100%; padding: 9px 32px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 14px; outline: none;
}
.search-wrap input:focus { border-color: var(--primary); }
.search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); font-size: 13px; opacity: .55; pointer-events: none; }
.clear-x {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  background: none; border: none; color: var(--muted); font-size: 18px;
  cursor: pointer; line-height: 1; padding: 2px 6px;
}
.clear-x:hover { color: var(--text); }
#batchFilter, .table-tools select {
  padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 14px;
}
.export-group { display: flex; gap: 8px; margin-left: auto; }

/* 可排序表头 */
.batch-result th.sortable { cursor: pointer; user-select: none; white-space: nowrap; }
.batch-result th.sortable:hover { color: var(--primary); }
.batch-result th.sortable.active { color: var(--primary); }
.batch-result th .arrow { font-size: 10px; opacity: .7; }
.batch-result tbody tr:hover { background: var(--code-bg); }

/* 前缀结构示意 */
.struct-row {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; color: var(--muted); margin-bottom: 4px;
}

/* 批量 */
.batch-card h2 { margin: 0 0 4px; font-size: 18px; }
.hint { margin: 0 0 12px; font-size: 13px; color: var(--muted); }
.batch-input {
  width: 100%; min-height: 130px; resize: vertical;
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit;
  outline: none; line-height: 1.5;
}
.batch-input:focus { border-color: var(--primary); }
.batch-actions { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.progress-text { font-size: 13px; color: var(--muted); }

.batch-result { margin-top: 16px; }
.batch-result table { width: 100%; border-collapse: collapse; font-size: 14px; }
.batch-result th, .batch-result td {
  text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border);
  word-break: break-all;
}
.batch-result th { color: var(--muted); background: var(--code-bg); }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; }
.dot.green { background: var(--green); }
.dot.red { background: var(--red); }
.dot.amber { background: var(--amber); }

/* ---------- 表格布局:长表滚动 + 长单元格处理 ---------- */
.table-scroll {
  max-height: 520px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.table-fixed {
  table-layout: fixed;
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table-fixed th, .table-fixed td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.table-fixed th {
  position: sticky;
  top: 0;
  background: var(--code-bg);
  color: var(--muted);
  z-index: 1;
}
/* 长文本:任意位置折行,避免撑爆列宽 */
.wrap-any {
  overflow-wrap: anywhere;
  word-break: break-word;
}
/* DNS 超长记录值:默认折叠约 3 行,可展开 */
.cell-val.clamp {
  max-height: 4.6em;
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: break-word;
  position: relative;
}
.cell-val.clamp.open { max-height: none; }
.expand-btn {
  margin-top: 6px;
  font-size: 12px;
  color: var(--primary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.expand-btn:hover { text-decoration: underline; }

/* 批量表:错误单元格 */
.err-cell { display: flex; flex-direction: column; gap: 3px; align-items: flex-start; }
.err-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber);
  border-radius: 5px;
  padding: 1px 6px;
  cursor: pointer;
}
.err-code:hover { filter: brightness(0.96); text-decoration: underline; }
.err-text { font-size: 12px; color: var(--muted); }
.src { font-size: 12px; color: var(--muted); opacity: .85; }
.err-code-mini {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--amber-bg); color: var(--amber);
  border-radius: 4px; padding: 0 4px; font-size: 11px;
}

/* 错误码对照表(可折叠) */
.err-ref-card {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  overflow: hidden;
}
.err-ref-toggle {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
  background: none; border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; color: var(--text);
}
.err-ref-toggle .chev { transition: transform .2s; opacity: .6; }
.err-ref-toggle.open .chev { transform: rotate(90deg); }
.err-ref-body { padding: 0 16px 6px; }
.err-ref-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.err-ref-table th, .err-ref-table td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.err-ref-table th { color: var(--muted); background: var(--code-bg); position: sticky; top: 0; }
.err-ref-table code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--code-bg); padding: 1px 5px; border-radius: 4px;
}
.err-ref-table tr.hl { background: var(--amber-bg); }
.err-ref-hint { font-size: 12px; color: var(--muted); padding: 8px 16px 14px; }

/* 高级设置:CORS 代理 / WHOIS 接口 */
.settings-card {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  overflow: hidden;
}
.settings-toggle {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
  background: none; border: none; cursor: pointer;
  font-size: 15px; font-weight: 600; color: var(--text);
}
.settings-toggle .chev { transition: transform .2s; opacity: .6; }
.settings-toggle.open .chev { transform: rotate(90deg); }
.settings-body { padding: 4px 16px 16px; }
.settings-body code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 12px;
}
.set-sep { border: none; border-top: 1px dashed var(--border); margin: 14px 0; }
.settings-body .pf-row { margin-top: 10px; }
.settings-body #proxyInput { width: 100%; margin-top: 4px; }
#proxyMsg { color: var(--green); }

/* 通用状态 */
.empty, .error, .loading { padding: 16px; border-radius: 10px; font-size: 14px; }
.empty { color: var(--muted); background: var(--code-bg); }
.error { color: var(--red); background: var(--red-bg); }
.loading { color: var(--muted); background: var(--code-bg); }
.spinner {
  display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%; animation: spin .7s linear infinite;
  vertical-align: -2px; margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 全局底部:数据来源 + 版权声明 */
.site-foot {
  max-width: 920px;
  margin: 8px auto 40px;
  padding: 20px 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.site-foot .src-line { font-size: 12px; color: var(--muted); margin: 0 0 6px; line-height: 1.7; }
.site-foot .src-line a { color: var(--primary); text-decoration: none; }
.site-foot .src-line a:hover { text-decoration: underline; }
.site-foot .copyright { font-size: 12px; color: var(--muted); margin: 0; }

@media (max-width: 560px) {
  .lookup-form { flex-direction: column; }
  .primary-btn { width: 100%; }

  /* 批量:前缀表单改单列,字段上下堆叠,避免 TLD 标签溢出 */
  .prefix-form { grid-template-columns: 1fr; }
  .pf-row { flex-direction: column; align-items: stretch; }
  .pf-row > label { flex: none; margin-bottom: 4px; }
  .pf-row input, .pf-row select { width: 100%; min-width: 0; }
  .tld-chips { flex-wrap: wrap; }
  .pf-row-wide { gap: 8px; }
  #mode-tlds .tld-chips { margin-top: 6px; }

  /* 表格:窄屏改为横向滚动,避免列被压得太窄看不清 */
  .batch-result .table-fixed { min-width: 460px; }
  .table-scroll { -webkit-overflow-scrolling: touch; }

  /* 工具行:搜索/筛选/导出各占一行铺满,导出按钮等大 */
  .table-tools { gap: 8px; }
  .search-wrap { flex: 1 1 100%; min-width: 0; }
  #batchFilter, .table-tools select { flex: 1 1 100%; }
  .export-group { width: 100%; margin-left: 0; }
  .export-group .primary-btn, .export-group .ghost-btn { flex: 1; justify-content: center; }

  /* 主标签在小屏缩字,避免三栏被挤 */
  .nav-tab { font-size: 13px; padding: 10px 4px 12px; }
  .main-nav { padding: 0 8px 8px; }
}