:root {
  --bg-void: #0c1013;
  --bg-sidebar: #10151a;
  --bg-panel: #151b20;
  --bg-elevated: #1a2128;
  --bg-inset: #0f1418;
  --border-hairline: #262f36;
  --border-strong: #333e46;
  --text-primary: #e6ebee;
  --text-secondary: #93a1ab;
  --text-tertiary: #5c6870;
  --slate-accent: #5a8fa3;
  --slate-accent-dim: #3d6577;
  --risk-low: #4f8c6e;
  --risk-low-bg: rgba(79, 140, 110, 0.12);
  --risk-pending: #a8823f;
  --risk-pending-bg: rgba(168, 130, 63, 0.12);
  --risk-high: #b5484a;
  --risk-high-bg: rgba(181, 72, 74, 0.14);
  --font-ui: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --radius: 2px;
}

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

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  height: 100%;
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, canvas, svg { max-width: 100%; }

.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

a { color: inherit; text-decoration: none; }

button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--slate-accent);
  outline-offset: 2px;
}

.shell {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */

.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 24px 20px;
  border-bottom: 1px solid var(--border-hairline);
  margin-bottom: 20px;
}

.brand-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--bg-void);
  background: var(--slate-accent);
  padding: 6px 8px;
  border-radius: var(--radius);
  letter-spacing: 0.04em;
}

.brand-text { display: flex; flex-direction: column; }

.brand-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand-subtitle {
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  margin-top: 2px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  padding: 0 12px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-tertiary);
  letter-spacing: 0.14em;
  padding: 16px 8px 6px 8px;
}

.nav-group-label:first-child { padding-top: 0; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

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

.nav-item.is-active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-left-color: var(--slate-accent);
}

.nav-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  border: 1.5px solid currentColor;
  opacity: 0.8;
}

.nav-icon[data-icon="grid"] { border-radius: 2px; }
.nav-icon[data-icon="table"] { border-radius: 2px; border-style: dashed; }
.nav-icon[data-icon="pulse"] { border-radius: 50%; }
.nav-icon[data-icon="cpu"] { border-radius: 2px; transform: rotate(45deg); }
.nav-icon[data-icon="shield"] { border-radius: 2px 2px 8px 8px; }

.sidebar-footer {
  padding: 16px 20px 0 20px;
  border-top: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.engineer-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.engineer-role {
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
}

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

.system-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  font-weight: 600;
  color: var(--risk-low);
  letter-spacing: 0.08em;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--risk-low);
  box-shadow: 0 0 0 3px rgba(79, 140, 110, 0.18);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- Main ---------- */

.main {
  padding: 28px 32px 48px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.topbar h1 {
  font-size: clamp(17px, 4vw, 20px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.topbar-meta {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.clock-block {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.clock-label {
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
}

.clock-value {
  font-size: 15px;
  font-weight: 600;
}

.btn-sync {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--slate-accent);
  color: var(--bg-void);
  border: 1px solid var(--slate-accent);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background-color 0.15s ease, transform 0.1s ease, opacity 0.15s ease;
}

.btn-sync:hover:not(:disabled) {
  background: #6ea0b4;
}

.btn-sync:active:not(:disabled) {
  transform: translateY(1px);
}

.btn-sync:disabled {
  opacity: 0.55;
  cursor: progress;
}

.btn-sync-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.btn-sync.is-loading .btn-sync-icon {
  animation: spin-icon 0.8s linear infinite;
  border-radius: 2px;
}

@keyframes spin-icon {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ---------- Vitals grid ---------- */

.vitals-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.vital-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: border-color 0.15s ease;
}

.vital-card:hover {
  border-color: var(--border-strong);
}

.vital-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.vital-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.vital-unit {
  font-size: 10px;
  color: var(--text-tertiary);
}

.vital-value-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.vital-value {
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 600;
  line-height: 1;
  transition: color 0.2s ease;
}

.vital-trend {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: var(--radius);
  color: var(--risk-low);
  background: var(--risk-low-bg);
}

.vital-trend[data-state="elevated"] {
  color: var(--risk-pending);
  background: var(--risk-pending-bg);
}

.vital-trend[data-state="critical"] {
  color: var(--risk-high);
  background: var(--risk-high-bg);
}

.vital-range {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-tertiary);
}

/* ---------- Panels ---------- */

.panel-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 14px;
  align-items: stretch;
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-head h2 {
  font-size: 14px;
  font-weight: 700;
}

.panel-sub {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-tertiary);
}

.chart-legend {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-secondary);
}

.legend-swatch {
  width: 12px;
  height: 2px;
  display: inline-block;
}

.swatch-primary { background: var(--slate-accent); }

.swatch-threshold {
  background: repeating-linear-gradient(
    to right, var(--risk-pending) 0 4px, transparent 4px 7px
  );
}

.chart-canvas-wrap {
  position: relative;
  flex: 1;
  min-height: 260px;
}

.log-panel { min-height: 260px; }

.telemetry-log {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  max-height: 280px;
}

.log-entry {
  display: flex;
  gap: 10px;
  font-size: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-hairline);
}

.log-entry:last-child { border-bottom: none; padding-bottom: 0; }

.log-time {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.log-text { color: var(--text-secondary); }

/* ---------- Table ---------- */

.table-panel { padding-bottom: 8px; }

.record-count {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  align-self: center;
}

.table-scroll { overflow-x: auto; }

.record-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.record-table thead th {
  text-align: left;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  padding: 0 12px 10px 12px;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}

.record-table tbody td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--border-hairline);
  color: var(--text-primary);
  white-space: nowrap;
}

.record-table tbody tr {
  transition: background-color 0.15s ease;
}

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

.record-table tbody tr:last-child td {
  border-bottom: none;
}

.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 4px 9px;
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.badge-low {
  color: var(--risk-low);
  background: var(--risk-low-bg);
}

.badge-pending {
  color: var(--risk-pending);
  background: var(--risk-pending-bg);
}

.badge-high {
  color: var(--risk-high);
  background: var(--risk-high-bg);
}

.badge-flash {
  animation: badge-flash-in 0.6s ease;
}

@keyframes badge-flash-in {
  0% { box-shadow: 0 0 0 0 rgba(181, 72, 74, 0.5); }
  100% { box-shadow: 0 0 0 8px rgba(181, 72, 74, 0); }
}

/* ---------- Responsive ---------- */

@media (max-width: 1180px) {
  .panel-grid { grid-template-columns: 1fr; }
  .vitals-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    flex-direction: row;
    align-items: center;
    padding: 12px 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .sidebar-brand { border-bottom: none; margin-bottom: 0; padding: 0 16px 0 0; flex-shrink: 0; }
  .sidebar-nav { flex-direction: row; padding: 0; flex-shrink: 0; }
  .nav-item { white-space: nowrap; }
  .nav-group-label { display: none; }
  .sidebar-footer { display: none; }
  .main { padding: 18px; gap: 16px; }
  .vitals-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .topbar { flex-direction: column; align-items: stretch; gap: 14px; }
  .topbar-right { justify-content: space-between; }
  .btn-sync { flex-shrink: 0; }
}

@media (max-width: 560px) {
  .main { padding: 14px; gap: 14px; }
  .vitals-grid { grid-template-columns: 1fr; gap: 10px; }
  .vital-card { padding: 14px 16px; }
  .panel { padding: 16px; }
  .panel-head { flex-direction: column; align-items: stretch; gap: 10px; }
  .chart-legend { gap: 10px; }
  .chart-canvas-wrap { min-height: 200px; }
  .topbar-right { flex-direction: column; align-items: stretch; gap: 12px; }
  .clock-block { align-items: flex-start; flex-direction: row; gap: 8px; align-items: baseline; }
  .btn-sync { justify-content: center; }
  .record-table { font-size: 12px; }
  .record-table thead th, .record-table tbody td { padding: 10px 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .status-dot, .btn-sync.is-loading .btn-sync-icon, .badge-flash {
    animation: none;
  }
}