:root {
  --bg-root: #08090d;
  --bg-surface: #0f1118;
  --bg-elevated: #141722;
  --bg-hover: #191d2b;
  --border-subtle: #1e2334;
  --border-strong: #2a3149;
  --text-primary: #f3f5f9;
  --text-secondary: #9ba3b8;
  --text-muted: #646d85;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-soft: rgba(59, 130, 246, 0.14);
  --emerald: #10b981;
  --emerald-soft: rgba(16, 185, 129, 0.13);
  --amber: #f59e0b;
  --amber-soft: rgba(245, 158, 11, 0.14);
  --rose: #f43f5e;
  --rose-soft: rgba(244, 63, 94, 0.14);
  --sky: #38bdf8;
  --sky-soft: rgba(56, 189, 248, 0.14);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-root);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.app-shell {
  max-width: 1600px;
  margin: 0 auto;
  padding: 16px 24px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px 18px;
  gap: 16px;
  flex-wrap: wrap;
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, #2563eb, #10b981);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

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

.brand-title {
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.version-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--emerald-soft);
  color: var(--emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.brand-subtitle {
  font-size: 11.5px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-root);
  padding: 4px;
  border-radius: 9px;
  border: 1px solid var(--border-subtle);
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 7px;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 7px 13px;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.nav-tab:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.nav-tab.active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-strong);
}

.tab-count {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.tab-count.accent {
  background: var(--accent-soft);
  color: var(--sky);
}

/* Status Cluster */
.status-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-pills {
  display: flex;
  gap: 6px;
}

.node-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.node-pill.ok {
  border-color: rgba(16, 185, 129, 0.3);
  color: #a7f3d0;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
}

.btn-refresh {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  padding: 6px 12px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-refresh:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
}

/* KPI Strip */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kpi-card.highlight {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.07) 0%, var(--bg-surface) 100%);
  border-color: rgba(16, 185, 129, 0.35);
}

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.kpi-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.kpi-value-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.kpi-value {
  font-size: 21px;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.kpi-unit {
  font-size: 12px;
  color: var(--text-secondary);
}

.kpi-sub {
  font-size: 11.5px;
  color: var(--text-secondary);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  white-space: nowrap;
}

.badge-emerald {
  background: var(--emerald-soft);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-amber {
  background: var(--amber-soft);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-rose {
  background: var(--rose-soft);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.badge-sky {
  background: var(--sky-soft);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-neutral {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* Tab Panels */
.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px 10px 0 0;
  padding: 12px 16px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-pill {
  background: var(--bg-root);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 5px 11px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-pill:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.filter-pill.active {
  background: var(--accent-soft);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.45);
  font-weight: 600;
}

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

.select-input {
  background: var(--bg-root);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 6px 11px;
  border-radius: 6px;
  font-size: 12.5px;
  font-family: var(--font-sans);
  outline: none;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 5px 10px;
  min-width: 280px;
  color: var(--text-muted);
}

.search-box.full-width {
  min-width: 100%;
  margin-top: 8px;
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 12.5px;
  width: 100%;
  outline: none;
}

/* Tables */
.table-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-top: none;
  border-radius: 0 0 10px 10px;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
  font-size: 13px;
}

.data-table tbody tr {
  transition: background 0.12s;
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.mono {
  font-family: var(--font-mono);
  font-size: 12px;
}

.sub-line {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Unibox Split View */
.unibox-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  min-height: 640px;
  overflow: hidden;
}

.unibox-sidebar {
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  max-height: 680px;
}

.unibox-sidebar-header {
  padding: 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.thread-list {
  overflow-y: auto;
  flex: 1;
}

.thread-item {
  padding: 13px 15px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background 0.12s;
}

.thread-item:hover {
  background: var(--bg-hover);
}

.thread-item.active {
  background: rgba(59, 130, 246, 0.11);
  border-left: 3px solid var(--accent);
}

.thread-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.thread-sender {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13px;
}

.thread-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.thread-subj {
  font-weight: 500;
  color: #e2e8f0;
  font-size: 12.5px;
  margin-bottom: 4px;
}

.thread-snippet {
  font-size: 12px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.thread-meta-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 7px;
  flex-wrap: wrap;
}

.unibox-detail {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px 24px;
  max-height: 680px;
  overflow-y: auto;
}

.detail-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
  margin-bottom: 16px;
}

.detail-subject-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.detail-subject {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.detail-addresses {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 12.5px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.detail-body {
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 16px 18px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-primary);
  white-space: pre-wrap;
  margin-bottom: 18px;
  flex: 1;
  overflow-y: auto;
}

/* Composer */
.reply-composer {
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 14px;
}

.composer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  gap: 8px;
  flex-wrap: wrap;
}

.composer-textarea {
  width: 100%;
  min-height: 95px;
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  padding: 10px 12px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  resize: vertical;
  outline: none;
  margin-bottom: 10px;
}

.composer-textarea:focus {
  border-color: var(--accent);
}

.composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.composer-hint {
  font-size: 11.5px;
  color: var(--text-muted);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 15px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-strong);
  padding: 8px 14px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
}

/* Domains & Servers Grid */
.section-heading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
  flex-wrap: wrap;
}

.section-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.section-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.server-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.server-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 16px 18px;
}

.server-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.server-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
}

.server-meta-grid {
  display: grid;
  grid-template-columns: 120px 1fr;
  row-gap: 6px;
  column-gap: 10px;
  font-size: 12.5px;
}

.server-meta-label {
  color: var(--text-muted);
  font-weight: 500;
}

.server-meta-val {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.domain-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.domain-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.domain-title {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-primary);
}

.domain-role {
  font-size: 11.5px;
  color: var(--text-secondary);
}

.dns-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dns-badge {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 7px;
  border-radius: 5px;
}

.dns-pass {
  background: var(--emerald-soft);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.dns-missing {
  background: var(--rose-soft);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.35);
}

.dns-opt {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.domain-stats-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  padding: 8px 10px;
  gap: 8px;
}

.d-stat-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.d-stat-val {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-primary);
}

.domain-note {
  font-size: 11.5px;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Strategy Tab */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.strategy-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  padding: 18px 20px;
}

.strategy-card.full-span {
  grid-column: 1 / -1;
}

.strategy-card-header {
  margin-bottom: 12px;
}

.strategy-card-header h3 {
  font-size: 15.5px;
  font-weight: 700;
  margin-top: 6px;
}

.rule-list {
  margin-top: 10px;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  color: var(--text-secondary);
}

.rule-list strong {
  color: var(--text-primary);
}

.volume-tier-box {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.tier-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 10px 13px;
  gap: 10px;
}

.tier-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13px;
}

.tier-sub {
  font-size: 11.5px;
  color: var(--text-muted);
}

.tier-Right {
  text-align: right;
  display: flex;
  flex-direction: column;
}

.tier-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--sky);
}

.tier-total {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: #34d399;
}

.rule-note {
  font-size: 12px;
  color: var(--text-secondary);
}

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

.fix-item {
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 13px 15px;
  display: flex;
  gap: 12px;
}

.fix-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 5px;
  background: var(--amber-soft);
  color: var(--amber);
  height: fit-content;
  white-space: nowrap;
}

.fix-content h4 {
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 4px;
}

.fix-content p {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.cmd-snippet {
  display: block;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 6px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #93c5fd;
  word-break: break-all;
}

.guardrails-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.guardrail-box {
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 12px;
}

.g-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-size: 13px;
}

.g-val {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Modal & Toast */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  width: 100%;
  max-width: 520px;
  padding: 20px 22px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.modal-header h3 {
  font-size: 16px;
  margin-top: 6px;
}

.modal-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  margin: 8px 0 14px;
}

.modal-summary {
  background: var(--bg-root);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
  font-size: 12.5px;
}

.modal-row {
  margin-bottom: 5px;
  color: var(--text-secondary);
}

.modal-row strong {
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.modal-body-preview {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  white-space: pre-wrap;
  color: var(--text-primary);
  max-height: 160px;
  overflow-y: auto;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--emerald);
  color: var(--text-primary);
  padding: 11px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 200;
}

.hidden {
  display: none !important;
}

@media (max-width: 1180px) {
  .kpi-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .domain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unibox-layout {
    grid-template-columns: 1fr;
  }
  .strategy-grid, .Fixes-grid, .server-grid, .guardrails-row {
    grid-template-columns: 1fr;
  }
}