/* ==========================================================================
   DO Level Tracker — dark industrial premium
   Shares the SA Smart Assistant design system: slate surfaces, one
   steel-blue accent, semantic color reserved for live state.
   ========================================================================== */

:root {
  color-scheme: dark;

  --bg: #0a0d12;
  --panel: #10141b;
  --panel-2: #141924;
  --surface: #171d28;
  --raised: #212a38;

  --line: rgba(151, 168, 192, 0.13);
  --line-strong: rgba(151, 168, 192, 0.24);
  --line-soft: var(--line);

  --text: #e9eef5;
  --muted: #9aa7b8;

  --accent: #3f7fe8;
  --accent-bright: #79aaff;
  --accent-soft: rgba(63, 127, 232, 0.14);

  --good: #55dfa6;
  --bad: #ff7a7a;
  --warn: #f0c169;

  --r-sm: 7px;
  --r-md: 10px;
  --r-lg: 14px;

  --panel-shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 12px 28px -10px rgba(0, 0, 0, 0.45);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 150ms;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 640px at -8% -12%, rgba(63, 127, 232, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Inter", ui-sans-serif, system-ui, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

body.zoom-mode {
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-height: 0;
  overflow: hidden;
}

.zoom-mode .topbar {
  min-height: 68px;
  padding: 10px 14px;
}

.zoom-mode .eyebrow {
  margin-bottom: 2px;
  font-size: 10px;
}

.zoom-mode h1 {
  font-size: clamp(16px, 2.4vw, 20px);
  line-height: 1.15;
}

.zoom-mode .status-strip {
  gap: 6px;
  font-size: 11px;
}

.zoom-mode .range-control,
.zoom-mode .status-pill,
.zoom-mode .popup-window-btn {
  min-height: 28px;
  padding-top: 4px;
  padding-bottom: 4px;
}

/* --------------------------------------------------------------------------
   Top bar
   -------------------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.011em;
}

h1 {
  font-size: 20px;
  font-weight: 650;
}

h2 {
  font-size: 14px;
  font-weight: 650;
}

.status-strip {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

.popup-window-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.popup-window-btn {
  min-width: 34px;
  min-height: 30px;
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--raised);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

.popup-window-btn:hover {
  border-color: rgba(63, 127, 232, 0.5);
  background: var(--accent-soft);
  color: var(--text);
}

.popup-window-btn.close:hover {
  border-color: rgba(214, 69, 69, 0.55);
  background: rgba(214, 69, 69, 0.16);
  color: var(--bad);
}

.range-control {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: #0d1117;
}

.range-control span {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.range-control select {
  min-width: 126px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.range-control option {
  background: #0d1117;
  color: var(--text);
}

.status-pill {
  min-width: 82px;
  padding: 6px 12px;
  border: 1px solid rgba(223, 166, 62, 0.45);
  border-radius: 999px;
  background: rgba(223, 166, 62, 0.12);
  color: var(--warn);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 11px;
  font-weight: 650;
}

.status-pill.online {
  border-color: rgba(47, 190, 134, 0.45);
  background: rgba(47, 190, 134, 0.12);
  color: var(--good);
}

.status-pill.fault {
  border-color: rgba(214, 69, 69, 0.5);
  background: rgba(214, 69, 69, 0.13);
  color: var(--bad);
}

.status-pill.partial {
  border-color: rgba(223, 166, 62, 0.45);
  background: rgba(223, 166, 62, 0.12);
  color: var(--warn);
}

.status-pill.restored {
  border-color: rgba(63, 127, 232, 0.45);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.layout {
  display: grid;
  grid-template-columns: minmax(330px, 0.78fr) minmax(620px, 1.42fr);
  grid-template-areas:
    "values values"
    "overview charts"
    "table table";
  gap: 16px;
  padding: 16px;
}

.live-values-panel {
  grid-area: values;
  overflow: hidden;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--panel-shadow);
}

.live-values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  padding: 12px 14px 14px;
}

.live-value-tile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "label value"
    "label source";
  align-items: center;
  gap: 4px 10px;
  min-height: 74px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color var(--t-fast) var(--ease-out);
}

.live-value-tile .live-value-name::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  background: #64748b;
  vertical-align: 1px;
}

.live-value-tile.live {
  border-color: rgba(47, 190, 134, 0.35);
}

.live-value-tile.live .live-value-name::before {
  background: var(--good);
  box-shadow: 0 0 0 3px rgba(47, 190, 134, 0.14);
}

.live-value-tile.saved {
  border-color: rgba(223, 166, 62, 0.32);
  opacity: 0.78;
}

.live-value-tile.saved .live-value-name::before {
  background: var(--warn);
}

.live-value-tile.missing {
  border-color: rgba(214, 69, 69, 0.4);
}

.live-value-tile.missing .live-value-name::before {
  background: var(--bad);
}

.live-value-name,
.live-value-address {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.live-value-name {
  color: var(--text);
  font-size: 13px;
  font-weight: 650;
}

.live-value-address {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
}

.live-value-tile strong {
  grid-area: value;
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.015em;
  line-height: 1;
  text-align: right;
}

.live-value-tile small {
  grid-area: source;
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-align: right;
  text-transform: uppercase;
}

.empty-tags {
  margin: 0;
  padding: 12px;
  color: var(--muted);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   Overview / process mimic
   -------------------------------------------------------------------------- */

.overview {
  grid-area: overview;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
  min-width: 0;
}

.pressure-panel,
.chart-panel,
.table-panel {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--panel-shadow);
}

.pressure-panel {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
}

.pressure-panel span,
.pressure-panel small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pressure-panel strong {
  font-size: 30px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.015em;
  color: var(--accent-bright);
}

.process-grid {
  display: grid;
  gap: 12px;
}

.train-row {
  position: relative;
  min-height: 134px;
  padding: 14px 14px 26px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background:
    linear-gradient(90deg, transparent 48%, rgba(151, 168, 192, 0.14) 49%, rgba(151, 168, 192, 0.14) 51%, transparent 52%),
    #0d1219;
}

.train-row::before,
.train-row::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  height: 12px;
  border: 1px solid #6f7c8a;
  border-radius: 3px;
  background: linear-gradient(#b9c2cb, #6f7a86 45%, #d7dde3 55%, #67717c);
  opacity: 0.8;
}

.train-row::before {
  top: 12px;
}

.train-row::after {
  bottom: 24px;
}

.train-title {
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.asset-pair {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  min-height: 88px;
}

.asset {
  display: grid;
  align-content: center;
  gap: 8px;
  min-width: 0;
}

.asset-name {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 15px;
  font-weight: 650;
}

.valve-symbol {
  width: 48px;
  height: 20px;
  border-radius: 10px;
  border: 1px solid #64748b;
  background: linear-gradient(90deg, #c3ccd5, #5f6b78, #c3ccd5);
}

.asset-values {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.mini-metric {
  min-width: 0;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
}

.mini-metric span {
  display: block;
  color: var(--muted);
  font-size: 9.5px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.mini-metric strong {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mini-metric em {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 9px;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.mini-metric.stale,
.legend-item.stale,
.stale-row {
  opacity: 0.68;
}

.mini-metric.stale {
  border-color: rgba(223, 166, 62, 0.36);
}

/* --------------------------------------------------------------------------
   Charts
   -------------------------------------------------------------------------- */

.charts {
  grid-area: charts;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  min-width: 0;
}

.chart-panel {
  display: grid;
  grid-template-rows: auto minmax(210px, 1fr) auto;
  min-width: 0;
  min-height: 338px;
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 42px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}

.chart-title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.split-chart-btn,
.zoom-chart-btn {
  min-height: 30px;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--raised);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

.zoom-chart-btn.compact {
  min-height: 24px;
  padding: 3px 7px;
  font-size: 10px;
}

.split-chart-btn:hover,
.zoom-chart-btn:hover {
  border-color: rgba(63, 127, 232, 0.5);
  background: var(--accent-soft);
  color: var(--text);
}

.split-chart-btn.active {
  border-color: rgba(63, 127, 232, 0.5);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.panel-head span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.chart-view {
  display: none;
  min-height: 0;
}

.chart-view.active {
  display: grid;
  grid-template-rows: minmax(210px, 1fr) auto;
  min-height: 0;
}

.split-chart-view {
  display: none;
  min-height: 0;
}

.split-chart-view.active {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 0;
}

.split-chart {
  display: grid;
  grid-template-rows: auto minmax(176px, 1fr) auto;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--line);
}

.split-chart:last-child {
  border-right: 0;
}

.split-chart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}

.split-chart-head h3 {
  margin: 0;
  font-size: 13.5px;
  font-weight: 650;
}

.split-chart-head span {
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

canvas {
  width: 100%;
  height: 100%;
  min-height: 210px;
  cursor: crosshair;
  background:
    linear-gradient(rgba(151, 168, 192, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(151, 168, 192, 0.07) 1px, transparent 1px),
    #070b10;
  background-size: 100% 28px, 58px 100%;
}

.legend {
  display: grid;
  grid-template-columns: auto repeat(3, minmax(0, 1fr));
  gap: 4px 10px;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
}

.legend-item,
.legend-reset {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  text-align: left;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

.legend-item {
  padding: 4px 5px;
}

.legend-reset {
  justify-content: center;
  min-width: 42px;
  padding: 4px 7px;
  color: var(--text);
  font-weight: 650;
}

.swatch {
  width: 18px;
  height: 3px;
  flex: 0 0 auto;
  border-radius: 2px;
}

.legend-item span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.legend-item:hover,
.legend-reset:hover,
.legend-item.selected,
.legend-reset.active {
  border-color: rgba(63, 127, 232, 0.45);
  background: var(--accent-soft);
  color: var(--text);
}

.legend-item.dimmed {
  opacity: 0.34;
}

.legend-item.selected .swatch {
  height: 5px;
}

/* --------------------------------------------------------------------------
   Zoom / popup modes
   -------------------------------------------------------------------------- */

.zoom-mode .layout {
  flex: 1 1 auto;
  grid-template-columns: 1fr;
  grid-template-areas: "charts";
  height: auto;
  min-height: 0;
  padding: 10px;
  overflow: hidden;
}

.zoom-mode .live-values-panel,
.zoom-mode .overview,
.zoom-mode .table-panel,
.chart-panel.is-hidden {
  display: none;
}

.zoom-mode .charts {
  grid-template-columns: 1fr;
  grid-auto-rows: minmax(0, 1fr);
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.zoom-mode.zoom-all-mode .charts {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.zoom-mode .chart-panel {
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-height: 0;
  height: 100%;
}

.zoom-mode.zoom-all-mode .chart-panel {
  min-height: 0;
}

.zoom-mode .chart-view.active {
  grid-template-rows: minmax(0, 1fr) auto;
}

.zoom-mode.zoom-all-mode .chart-view.active {
  grid-template-rows: minmax(0, 1fr) auto;
}

.zoom-mode canvas {
  min-height: 0;
}

.zoom-mode.zoom-all-mode canvas {
  min-height: 0;
}

.zoom-mode.zoom-all-mode .panel-head {
  min-height: 34px;
  padding: 6px 10px;
}

.zoom-mode.zoom-all-mode h2 {
  font-size: 13.5px;
}

.zoom-mode.zoom-all-mode .zoom-chart-btn,
.zoom-mode.zoom-all-mode .split-chart-btn {
  min-height: 24px;
  padding: 3px 7px;
  font-size: 10px;
}

.zoom-mode.zoom-all-mode .legend {
  grid-template-columns: auto repeat(3, minmax(0, 1fr));
  gap: 2px 6px;
  padding: 5px 8px 6px;
}

.zoom-mode.zoom-all-mode .legend-item,
.zoom-mode.zoom-all-mode .legend-reset {
  min-height: 22px;
  padding: 2px 4px;
  font-size: 10px;
}

.popup-minimized {
  min-height: auto;
  overflow: hidden;
}

.popup-minimized .layout {
  display: none;
}

.popup-minimized .topbar {
  min-height: 100vh;
  padding: 10px 14px;
}

.popup-minimized .eyebrow,
.popup-minimized .range-control,
.popup-minimized #source,
.popup-minimized #status,
.popup-minimized #clock {
  display: none;
}

.popup-minimized h1 {
  font-size: 16px;
}

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

.table-panel {
  grid-area: table;
  overflow: hidden;
}

.table-wrap {
  max-height: 360px;
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  position: sticky;
  top: 0;
  z-index: 2;
  color: var(--muted);
  background: var(--panel-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 10.5px;
  font-weight: 650;
}

td.value-cell {
  color: var(--text);
  font-weight: 650;
}

.stale-row td.value-cell {
  color: var(--warn);
}

.pen-line {
  width: 30px;
  height: 4px;
  border-radius: 2px;
}

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

/* --------------------------------------------------------------------------
   Motion & responsive
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "values"
      "overview"
      "charts"
      "table";
  }
}

@media (max-width: 760px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .layout,
  .charts {
    grid-template-columns: 1fr;
  }

  .zoom-mode.zoom-all-mode .charts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .asset-pair,
  .asset-values,
  .split-chart-view.active {
    grid-template-columns: 1fr;
  }

  .legend {
    grid-template-columns: auto 1fr;
  }

  .split-chart {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .split-chart:last-child {
    border-bottom: 0;
  }
}