:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --line: #d8dee8;
  --text: #172033;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --teal: #0f766e;
  --input-bg: #ffffff;
  --sidebar-bg: #111827;
  --sidebar-hover: #1f2937;
  --sidebar-text: #cbd5e1;
  --sidebar-active: #ffffff;
  --topbar-bg: #ffffff;
  --table-head: #f8fafc;
  --chart-line: #2563eb;
  --chart-grid: #d8dee8;
  --chart-axis: #64748b;
  --chart-tooltip-bg: rgba(255, 255, 255, 0.96);
  --chart-tooltip-border: #d8dee8;
  --danger-bg: #fef2f2;
  --danger-text: #b91c1c;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] {
  --bg: #0b1120;
  --panel: #121a2b;
  --line: #263449;
  --text: #e5edf7;
  --muted: #9aa9bc;
  --primary: #60a5fa;
  --primary-dark: #3b82f6;
  --teal: #2dd4bf;
  --input-bg: #0f172a;
  --sidebar-bg: #060b16;
  --sidebar-hover: #172033;
  --sidebar-text: #a8b3c7;
  --sidebar-active: #f8fafc;
  --topbar-bg: #101827;
  --table-head: #162033;
  --chart-line: #60a5fa;
  --chart-grid: #263449;
  --chart-axis: #9aa9bc;
  --chart-tooltip-bg: rgba(15, 23, 42, 0.96);
  --chart-tooltip-border: #334155;
  --danger-bg: #3b1116;
  --danger-text: #fca5a5;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

input,
select,
button {
  font: inherit;
}

.login-body {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), transparent 42%),
    linear-gradient(315deg, rgba(15, 118, 110, 0.14), transparent 48%),
    var(--bg);
}

[data-theme="dark"] .login-body {
  background:
    linear-gradient(135deg, rgba(96, 165, 250, 0.12), transparent 42%),
    linear-gradient(315deg, rgba(45, 212, 191, 0.12), transparent 48%),
    var(--bg);
}

.login-shell {
  width: min(420px, 100%);
}

.login-panel,
.query-panel,
.chart-section,
.table-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.login-panel {
  padding: 28px;
}

.login-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.brand-block,
.side-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.brand-block h1 {
  margin: 0;
  font-size: 22px;
}

.brand-block p {
  margin: 4px 0 0;
  color: var(--muted);
}

.login-form {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 11px;
  color: var(--text);
  background: var(--input-bg);
}

input:focus,
select:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(37, 99, 235, 0.14);
}

.captcha-row {
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 10px;
  align-items: center;
}

.captcha-img {
  width: 160px;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  background: var(--table-head);
}

.primary-button {
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  padding: 0 18px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

.primary-button:hover {
  background: var(--primary-dark);
}

.alert {
  margin-top: 18px;
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--danger-bg);
  color: var(--danger-text);
  font-size: 14px;
}

.app-shell {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-active);
  padding: 18px;
}

.side-brand strong {
  overflow-wrap: anywhere;
}

.side-nav {
  display: grid;
  gap: 6px;
  margin-top: 28px;
}

.side-nav a {
  display: block;
  border-radius: 6px;
  padding: 11px 12px;
  color: var(--sidebar-text);
  text-decoration: none;
}

.side-nav a.active,
.side-nav a:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-active);
}

.main-shell {
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 64px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: var(--topbar-bg);
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
  flex: 1;
}

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);
  cursor: pointer;
}

.theme-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 11px;
  background: var(--input-bg);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

.theme-button:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.theme-icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid currentColor;
  box-shadow: inset -5px -2px 0 currentColor;
}

[data-theme="dark"] .theme-icon {
  box-shadow: none;
}

.logout-link {
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
}

.content {
  display: grid;
  gap: 18px;
  padding: 22px;
}

.query-panel,
.chart-section,
.table-section {
  padding: 18px;
}

.query-form,
.manage-search {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) minmax(180px, 1fr) minmax(180px, 1fr) auto;
  gap: 14px;
  align-items: end;
}

.manage-search {
  grid-template-columns: minmax(240px, 1fr) auto;
}

.message {
  min-height: 20px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.message.error {
  color: var(--danger-text);
}

.chart {
  width: 100%;
  height: min(58vh, 520px);
  min-height: 340px;
}

.chart canvas {
  width: 100%;
  height: 100%;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 12px 10px;
  text-align: left;
  vertical-align: middle;
}

.data-table th {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  background: var(--table-head);
}

.path-cell {
  max-width: 420px;
  overflow-wrap: anywhere;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
}

.name-input {
  min-width: 220px;
}

.save-status {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.save-status.pending {
  color: #b45309;
}

.save-status.saved {
  color: var(--teal);
}

.save-status.error {
  color: var(--danger-text);
}

.empty-cell {
  color: var(--muted);
  text-align: center;
}

@media (max-width: 820px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    z-index: 10;
    inset: 0 auto 0 0;
    width: 236px;
    transform: translateX(-100%);
    transition: transform 0.18s ease;
  }

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

  .menu-button {
    display: inline-grid;
    place-items: center;
  }

  .content {
    padding: 14px;
  }

  .query-form,
  .manage-search {
    grid-template-columns: 1fr;
  }

  .chart {
    min-height: 320px;
    height: 54vh;
  }
}

@media (max-width: 420px) {
  .login-panel {
    padding: 20px;
  }

  .captcha-row {
    grid-template-columns: 1fr;
  }
}