:root {
  --bg-sidebar: #304156;
  --bg-sidebar-dark: #263445;
  --sidebar-width: 220px;
  --sidebar-width-collapsed: 64px;

  --bg-content: #f0f2f5;
  --bg-card: #ffffff;

  --primary: #409EFF;
  --primary-light: rgba(64, 158, 255, 0.1);
  --primary-dark: #337ecc;
  --success: #67c23a;
  --warning: #e6a23c;
  --danger: #f56c6c;
  --info: #909399;

  --text-main: #303133;
  --text-secondary: #606266;
  --text-faint: #909399;

  --line: #dcdfe6;
  --line-light: #e4e7ed;
  --line-extra-light: #ebeef5;

  --radius: 4px;
  --radius-md: 8px;

  --shadow-card: 0 1px 4px rgba(0, 0, 0, 0.06);
  --shadow-panel: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-sidebar: 2px 0 8px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }
[v-cloak] { display: none; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "IBM Plex Sans", "PingFang SC", "Helvetica Neue", sans-serif;
  font-size: 14px;
  color: var(--text-main);
  background: var(--bg-content);
}

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

/* ============================================================
   App Shell
   ============================================================ */
#app {
  display: flex;
  min-height: 100vh;
}

/* ============================================================
   Sidebar
   ============================================================ */
.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  color: rgba(255, 255, 255, 0.65);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: width 0.25s ease;
  overflow: hidden;
  box-shadow: var(--shadow-sidebar);
}

.sidebar-collapsed .app-sidebar {
  width: var(--sidebar-width-collapsed);
}

.sidebar-header {
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.sidebar-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  margin: 2px 8px;
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.sidebar-menu-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.sidebar-menu-item.active,
.sidebar-menu-item.active:hover {
  background: var(--primary);
  color: #fff;
}

.sidebar-menu-item i {
  font-size: 18px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-foot {
  padding: 12px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
}

/* ============================================================
   Main Wrapper
   ============================================================ */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  transition: margin-left 0.25s ease;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sidebar-collapsed .main-wrapper {
  margin-left: var(--sidebar-width-collapsed);
}

/* ============================================================
   Header Bar
   ============================================================ */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--line-extra-light);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.app-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-header-info h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
}

.app-header-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.header-sep {
  color: var(--line);
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.sidebar-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 20px;
  color: var(--text-secondary);
  padding: 4px;
  border-radius: var(--radius);
  line-height: 1;
}

.sidebar-toggle:hover {
  color: var(--primary);
}

.sidebar-toggle .is-collapsed {
  transform: rotate(180deg);
}

/* ============================================================
   Signal Cards
   ============================================================ */
.top-alert,
.signal-grid {
  margin: 12px 20px 0;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.signal-card {
  background: var(--bg-card);
  border: 1px solid var(--line-extra-light);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}

.signal-card.primary { border-left: 3px solid var(--primary); }
.signal-card.warning { border-left: 3px solid var(--warning); }
.signal-card.success { border-left: 3px solid var(--success); }
.signal-card.danger  { border-left: 3px solid var(--danger); }

.signal-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.signal-card-head span {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.signal-card-head small {
  font-size: 11px;
  color: var(--text-faint);
}

.signal-card-value {
  margin-top: 8px;
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
}

.signal-card p {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================================
   Main Content Area
   ============================================================ */
.main-content {
  padding: 4px 20px 32px;
  flex: 1;
}

/* ============================================================
   Cards
   ============================================================ */
.panel-card {
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line-extra-light);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.panel-card .el-card__header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-extra-light);
}

.panel-card .el-card__body {
  padding: 18px;
}

.panel-card-emphasis {
  border-left: 3px solid var(--primary);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-header > div:first-child span,
.dialog-title span {
  font-size: 16px;
  font-weight: 600;
}

.card-subtitle,
.muted,
.dialog-title small {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card-header-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   Overview Grid
   ============================================================ */
.overview-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 14px;
}

.health-rail {
  padding: 14px;
  border-radius: var(--radius);
  background: #f5f7fa;
  display: grid;
  gap: 12px;
}

.health-rail-copy {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.health-rail-copy strong {
  font-size: 24px;
  font-weight: 600;
}

.health-rail-copy span {
  color: var(--text-secondary);
  font-size: 13px;
}

.status-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.status-item {
  padding: 12px;
  border-radius: var(--radius);
  background: #fafafa;
  border: 1px solid var(--line-extra-light);
}

.status-item span {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-item strong {
  display: block;
  margin-top: 4px;
  font-size: 15px;
}

/* ============================================================
   Chips
   ============================================================ */
.chip-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip,
.active-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
}

.chip strong {
  color: var(--text-main);
  line-height: 1.3;
}

.chip-action {
  border: 1px solid var(--line-light);
  cursor: pointer;
  transition: border-color 0.18s, background 0.18s;
}

.chip-action:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.chip-static {
  background: rgba(0, 0, 0, 0.04);
}

.chip-wall-compact { margin-bottom: 14px; }

.divider-line {
  height: 1px;
  background: var(--line-extra-light);
  margin: 14px 0;
}

/* ============================================================
   Mini Lists
   ============================================================ */
.client-mini-list,
.attention-list {
  display: grid;
  gap: 10px;
}

.client-mini-item,
.attention-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  text-align: left;
  width: 100%;
  border: 1px solid var(--line-extra-light);
  border-radius: var(--radius);
  background: #fafafa;
  cursor: pointer;
  transition: background 0.15s;
}

.client-mini-item:hover,
.attention-item:hover {
  background: var(--primary-light);
}

.client-mini-item strong,
.attention-item strong {
  display: block;
  font-size: 14px;
}

.client-mini-item span,
.attention-item p {
  margin: 4px 0 0;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.5;
}

.attention-meta {
  white-space: nowrap;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================================
   Radar Chart
   ============================================================ */
.radar-list { display: grid; gap: 12px; }

.radar-row { display: grid; gap: 6px; }

.radar-row-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
}

.radar-row-head span { color: var(--text-secondary); }

.radar-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--line-extra-light);
  overflow: hidden;
}

.radar-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--primary);
}

/* ============================================================
   Quick Filters
   ============================================================ */
.quick-filter-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.quick-filter {
  padding: 10px 12px;
  text-align: left;
  line-height: 1.4;
  width: 100%;
  border: 1px solid var(--line-extra-light);
  border-radius: var(--radius);
  background: #fafafa;
  cursor: pointer;
  transition: all 0.18s ease;
}

.quick-filter.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

.quick-filter-type.active {
  border-color: var(--warning);
  background: rgba(230, 162, 60, 0.1);
  color: var(--warning);
}

.quick-filter strong {
  display: block;
  margin-top: 4px;
  font-size: 16px;
  color: var(--text-main);
  line-height: 1.3;
}

.quick-filter.active strong { color: var(--primary); }
.quick-filter-type.active strong { color: var(--warning); }

.filter-form {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.filter-form .el-form-item { margin-bottom: 8px; }

.filter-actions,
.active-filter-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.active-filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ============================================================
   Data Table
   ============================================================ */
.data-table .el-table__header th {
  background: #fafafa;
  color: var(--text-secondary);
  font-weight: 600;
}

.data-table .table-primary {
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-main);
  word-break: break-word;
}

.data-table .table-secondary {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  word-break: break-word;
}

.table-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.data-table .el-table__row.row-state-offline td {
  background: rgba(0, 0, 0, 0.02);
}

.data-table .el-table__row.row-state-overridden td {
  background: rgba(230, 162, 60, 0.06);
}

/* ============================================================
   Events
   ============================================================ */
.events-hero-grid,
.detail-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.event-meta-card,
.detail-summary-card {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: #fafafa;
  border: 1px solid var(--line-extra-light);
}

.event-meta-card span,
.detail-summary-card span {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
}

.event-meta-card strong,
.detail-summary-card strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
  font-weight: 700;
}

.event-meta-card p,
.detail-summary-card p {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================================
   Settings
   ============================================================ */
.settings-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(0, 1.22fr);
  gap: 14px;
}

.settings-column { display: grid; gap: 14px; align-content: start; }

.settings-form { display: grid; gap: 14px; }

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

.settings-actions { display: grid; gap: 14px; }

.settings-config-row { display: grid; gap: 12px; }

.settings-config-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.permission-badges {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.mono {
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Monaco", monospace;
  font-size: 13px;
}

/* ============================================================
   Detail Dialog
   ============================================================ */
.detail-layout { display: grid; gap: 16px; }

.detail-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 14px;
  align-items: start;
}

.detail-primary {
  color: var(--text-main);
  font-weight: 600;
  line-height: 1.5;
  word-break: break-word;
}

.detail-secondary {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  word-break: break-word;
}

.detail-descriptions .el-descriptions__body {
  background: transparent;
}

.detail-descriptions .el-descriptions-item__cell {
  background: #fafafa;
}

.detail-editor { display: grid; gap: 16px; }

.detail-editor .el-card__body { display: grid; gap: 14px; }

.client-detail-dialog .el-dialog {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.client-detail-dialog .el-dialog__header { padding-bottom: 12px; }
.client-detail-dialog .el-dialog__body { padding-top: 6px; }

.dialog-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.detail-action-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.detail-action-row .el-input {
  flex: 1;
  min-width: 0;
}

.button-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.note-stack {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.75;
}

.note-stack p { margin: 0; }

/* ============================================================
   Auth Gate
   ============================================================ */
.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-content);
}

.auth-card {
  width: 400px;
  max-width: calc(100vw - 40px);
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-extra-light);
  box-shadow: var(--shadow-panel);
  background: var(--bg-card);
  display: grid;
  gap: 16px;
}

.auth-header { text-align: center; }

.auth-header h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-main);
}

.auth-header p {
  margin: 8px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.auth-card .el-input-group__prepend {
  background: #f5f7fa;
  color: var(--text-secondary);
  font-weight: 500;
  border-color: var(--line);
}

.auth-card .el-button--large {
  width: 100%;
  height: 44px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius);
}

.auth-error {
  margin: 0;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: #fef0f0;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.3s ease;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
}

/* ============================================================
   Element UI Overrides
   ============================================================ */
.el-button,
.el-input__inner,
.el-textarea__inner,
.el-select .el-input__inner,
.el-input-number,
.el-switch__core,
.el-dialog,
.el-card,
.el-table,
.el-alert {
  border-radius: var(--radius);
}

.el-button--primary {
  background-color: var(--primary);
  border-color: var(--primary);
}

.el-button--primary:hover,
.el-button--primary:focus {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.el-button--default:hover,
.el-button--default:focus {
  color: var(--primary);
  border-color: var(--primary);
}

.el-button [class*="el-icon-"] {
  margin-right: 5px;
}

.el-tabs__nav-wrap::after,
.el-table::before,
.el-table--group::after,
.el-table--border::after {
  display: none;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1440px) {
  .signal-grid { grid-template-columns: repeat(3, 1fr); }
  .quick-filter-row { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 1200px) {
  .overview-grid,
  .settings-grid,
  .detail-content-grid {
    grid-template-columns: 1fr;
  }
  .events-hero-grid,
  .detail-summary-grid,
  .status-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .signal-grid,
  .quick-filter-row,
  .events-hero-grid,
  .detail-summary-grid,
  .status-matrix {
    grid-template-columns: 1fr;
  }
  .app-header { flex-wrap: wrap; }
  .app-header-right { width: 100%; justify-content: flex-end; }
}

@media (max-width: 760px) {
  .app-sidebar {
    transform: translateX(-100%);
    z-index: 150;
  }
  .sidebar-collapsed .app-sidebar { width: var(--sidebar-width); }
  .app-sidebar.open-mobile { transform: translateX(0); }
  .main-wrapper { margin-left: 0 !important; }

  .app-header { padding: 10px 14px; }
  .app-header-left { gap: 8px; }
  .app-header-meta { display: none; }
  .sidebar-toggle { display: block; }

  .main-content { padding: 4px 12px 24px; }
  .top-alert, .signal-grid { margin: 10px 12px 0; }

  .panel-card .el-card__header,
  .panel-card .el-card__body {
    padding-left: 14px;
    padding-right: 14px;
  }

  .auth-card { padding: 24px 18px; }
  .auth-header h2 { font-size: 20px; }

  .card-header,
  .button-row,
  .detail-action-row,
  .dialog-title {
    flex-direction: column;
    align-items: flex-start;
  }
  .detail-action-row > * { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}