/* ============================================================================
 * rz-bms-shell.css — Shared BMS/DCIM operations-console shell (v1.23.0)
 * ----------------------------------------------------------------------------
 * Foundation for the DC Conventional suite (8 pages) and the DC AI cockpit.
 *
 * Spec sources:
 *   - Documents/screenshot bms rz/conv/review/14-uiux-re-review-2026-05-22-best-design.md
 *   - Documents/screenshot bms rz/dc ai/review/24-uiux-re-review-2026-05-22-best-design.md
 *
 * Design principle (calm normal / loud abnormal):
 *   - Normal state is quiet — low chroma, no glow.
 *   - Warning / alarm states dominate the eye.
 *   - Selected object uses a single bright outline (no filled block).
 *   - Red is reserved for trip / fire / leak / EPO — never for "Feed A" etc.
 *   - Every numeric value gets tabular-nums + an explicit unit.
 *
 * Scope:
 *   - This file declares ONLY the shared shell components (tokens, status
 *     strip, left nav, inspector, KPI card, alarm row, layer toggles,
 *     typography helpers). Page-specific styling stays on the page.
 *   - Pages opt in by `<link rel="stylesheet" href="css/rz-bms-shell.css?v=...">`
 *     and root-class `<body class="rz-bms-shell">`. The shell is OFF on pages
 *     that don't carry that class — zero side-effects on the rest of the site.
 * ==========================================================================*/

/* ---------------------------------------------------------------------------
 * 1) Design tokens — dark operations palette (from conv/review/14 §1).
 *    Tokens prefixed `--rz-bms-` so they don't collide with page-local vars.
 * ---------------------------------------------------------------------------*/
:root {
  /* Surfaces */
  --rz-bms-bg:           #0b1118;
  --rz-bms-panel:        #121a24;
  --rz-bms-panel-raised: #182232;
  --rz-bms-border:       #293648;
  --rz-bms-border-faint: rgba(41, 54, 72, 0.55);
  --rz-bms-scrim:        rgba(11, 17, 24, 0.72);

  /* Text */
  --rz-bms-text:         #e7edf5;
  --rz-bms-text-dim:     #9aa8bb;
  --rz-bms-text-muted:   #66758a;

  /* Semantic state */
  --rz-bms-normal:       #55b878;
  --rz-bms-warn:         #dca33a;
  --rz-bms-critical:     #d94c4c;
  --rz-bms-trouble:      #b56fff;
  --rz-bms-stale:        #66758a;
  --rz-bms-maint:        #6aa1ff;
  --rz-bms-selected:     #50c8ff;

  /* Discipline (subsystem hues — neutral, NEVER alarm semantic) */
  --rz-bms-electrical:   #f0b84a;
  --rz-bms-cooling:      #4ca8c7;
  --rz-bms-water:        #4ca8c7;
  --rz-bms-fuel:         #c58a2a;
  --rz-bms-network:      #7aa2ff;
  --rz-bms-fire:         #d94c4c;
  --rz-bms-safety:       #d94c4c;

  /* Status chip backgrounds (low-chroma at rest, vivid on exception) */
  --rz-bms-bg-normal:    rgba(85, 184, 120, 0.10);
  --rz-bms-bg-warn:      rgba(220, 163, 58, 0.12);
  --rz-bms-bg-critical:  rgba(217, 76, 76, 0.15);
  --rz-bms-bg-trouble:   rgba(181, 111, 255, 0.12);
  --rz-bms-bg-stale:     rgba(102, 117, 138, 0.12);
  --rz-bms-bg-maint:     rgba(106, 161, 255, 0.10);
  --rz-bms-bg-selected:  rgba(80, 200, 255, 0.10);

  /* Typography */
  --rz-bms-font-sans: 'IBM Plex Sans', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --rz-bms-font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* Type scale — operations values larger, engineering annotations smaller */
  --rz-bms-fs-xs:   10px;
  --rz-bms-fs-sm:   11px;
  --rz-bms-fs-base: 13px;
  --rz-bms-fs-md:   15px;
  --rz-bms-fs-lg:   18px;
  --rz-bms-fs-xl:   24px;
  --rz-bms-fs-2xl:  32px;

  /* Line-heights */
  --rz-bms-lh-tight: 1.15;
  --rz-bms-lh-base:  1.45;

  /* Radii + spacing */
  --rz-bms-r-sm:   4px;
  --rz-bms-r-md:   6px;
  --rz-bms-r-lg:   10px;
  --rz-bms-sp-1:   4px;
  --rz-bms-sp-2:   8px;
  --rz-bms-sp-3:   12px;
  --rz-bms-sp-4:   16px;
  --rz-bms-sp-5:   20px;
  --rz-bms-sp-6:   24px;

  /* Shadows — flat by default, raise only on selection / modal */
  --rz-bms-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --rz-bms-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.35);

  /* Motion */
  --rz-bms-tx-fast:   120ms ease;
  --rz-bms-tx-base:   180ms ease;
  --rz-bms-tx-slow:   260ms ease;
}

/* ---------------------------------------------------------------------------
 * 2) Scoped root — only pages that opt-in get the shell.
 * ---------------------------------------------------------------------------*/
body.rz-bms-shell {
  background: var(--rz-bms-bg);
  color: var(--rz-bms-text);
  font-family: var(--rz-bms-font-sans);
  font-size: var(--rz-bms-fs-base);
  line-height: var(--rz-bms-lh-base);
  -webkit-font-smoothing: antialiased;
}

/* Every numeric value in a shell page is tabular by default. Override via
   `.rz-bms-num-prop` for proportional figures where needed (rare). */
body.rz-bms-shell .rz-bms-num,
body.rz-bms-shell .rz-bms-kpi-val,
body.rz-bms-shell .rz-bms-status-strip [data-numeric],
body.rz-bms-shell .rz-bms-alarm-row [data-numeric] {
  font-family: var(--rz-bms-font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
}

/* ---------------------------------------------------------------------------
 * 3) Top status strip — first read every page (`spec §1 Status Strip`).
 *    State | Active alarms | Data quality | Last update | Current constraint
 * ---------------------------------------------------------------------------*/
.rz-bms-status-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--rz-bms-sp-3);
  padding: var(--rz-bms-sp-2) var(--rz-bms-sp-4);
  background: var(--rz-bms-panel-raised);
  border-bottom: 1px solid var(--rz-bms-border);
  font-size: var(--rz-bms-fs-sm);
  position: sticky;
  top: 0;
  z-index: 30;
}
.rz-bms-status-cell {
  display: inline-flex;
  align-items: center;
  gap: var(--rz-bms-sp-1);
  white-space: nowrap;
}
.rz-bms-status-cell + .rz-bms-status-cell::before {
  content: '';
  width: 1px;
  height: 14px;
  margin-right: var(--rz-bms-sp-2);
  background: var(--rz-bms-border-faint);
}
.rz-bms-status-label {
  color: var(--rz-bms-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: var(--rz-bms-fs-xs);
}
.rz-bms-status-value {
  color: var(--rz-bms-text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.rz-bms-status-value.is-good     { color: var(--rz-bms-normal); }
.rz-bms-status-value.is-warn     { color: var(--rz-bms-warn); }
.rz-bms-status-value.is-critical { color: var(--rz-bms-critical); }
.rz-bms-status-value.is-stale    { color: var(--rz-bms-stale); }

/* Pill chip — used inline for state, role, data-mode, etc. */
.rz-bms-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--rz-bms-sp-1);
  padding: 2px 8px;
  border-radius: 999px;
  font-size: var(--rz-bms-fs-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  font-variant-numeric: tabular-nums;
}
.rz-bms-chip.is-normal    { background: var(--rz-bms-bg-normal);    color: var(--rz-bms-normal);    border-color: rgba(85, 184, 120, 0.35); }
.rz-bms-chip.is-warn      { background: var(--rz-bms-bg-warn);      color: var(--rz-bms-warn);      border-color: rgba(220, 163, 58, 0.40); }
.rz-bms-chip.is-critical  { background: var(--rz-bms-bg-critical);  color: var(--rz-bms-critical);  border-color: rgba(217, 76, 76, 0.45); }
.rz-bms-chip.is-trouble   { background: var(--rz-bms-bg-trouble);   color: var(--rz-bms-trouble);   border-color: rgba(181, 111, 255, 0.40); }
.rz-bms-chip.is-stale     { background: var(--rz-bms-bg-stale);     color: var(--rz-bms-stale);     border-color: rgba(102, 117, 138, 0.40); }
.rz-bms-chip.is-maint     { background: var(--rz-bms-bg-maint);     color: var(--rz-bms-maint);     border-color: rgba(106, 161, 255, 0.40); }
.rz-bms-chip.is-simulated { background: rgba(80, 200, 255, 0.08);   color: var(--rz-bms-selected);  border-color: rgba(80, 200, 255, 0.40); }

/* Status dot — tiny circle ahead of a nav item, KPI label, etc. */
.rz-bms-dot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
  background: var(--rz-bms-stale);
  vertical-align: 1px;
}
.rz-bms-dot.is-normal   { background: var(--rz-bms-normal); }
.rz-bms-dot.is-warn     { background: var(--rz-bms-warn);  box-shadow: 0 0 0 3px rgba(220, 163, 58, 0.18); }
.rz-bms-dot.is-critical { background: var(--rz-bms-critical); box-shadow: 0 0 0 3px rgba(217, 76, 76, 0.22); animation: rzBmsPulse 1.6s ease-in-out infinite; }
.rz-bms-dot.is-stale    { background: var(--rz-bms-stale); }

@keyframes rzBmsPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(217, 76, 76, 0.22); }
  50%      { box-shadow: 0 0 0 6px rgba(217, 76, 76, 0.08); }
}
@media (prefers-reduced-motion: reduce) {
  .rz-bms-dot.is-critical { animation: none; }
}

/* ---------------------------------------------------------------------------
 * 4) Left nav — subsystem list with status dot + alarm badge.
 * ---------------------------------------------------------------------------*/
.rz-bms-nav {
  display: flex;
  flex-direction: column;
  background: var(--rz-bms-panel);
  border-right: 1px solid var(--rz-bms-border);
  padding: var(--rz-bms-sp-3) var(--rz-bms-sp-2);
  min-width: 200px;
  max-width: 240px;
  font-size: var(--rz-bms-fs-sm);
}
.rz-bms-nav-section {
  color: var(--rz-bms-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--rz-bms-fs-xs);
  padding: var(--rz-bms-sp-3) var(--rz-bms-sp-2) var(--rz-bms-sp-1);
}
.rz-bms-nav-item {
  display: flex;
  align-items: center;
  gap: var(--rz-bms-sp-2);
  padding: var(--rz-bms-sp-2) var(--rz-bms-sp-2);
  color: var(--rz-bms-text-dim);
  text-decoration: none;
  border-radius: var(--rz-bms-r-sm);
  border-left: 2px solid transparent;
  transition: background var(--rz-bms-tx-fast), color var(--rz-bms-tx-fast);
}
.rz-bms-nav-item:hover {
  background: var(--rz-bms-panel-raised);
  color: var(--rz-bms-text);
}
.rz-bms-nav-item.is-active {
  background: var(--rz-bms-panel-raised);
  color: var(--rz-bms-text);
  border-left-color: var(--rz-bms-selected);
}
.rz-bms-nav-label { flex: 1; min-width: 0; }
.rz-bms-nav-badge {
  display: inline-flex; align-items: center;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: var(--rz-bms-fs-xs);
  font-weight: 700;
  background: var(--rz-bms-bg-warn);
  color: var(--rz-bms-warn);
  font-variant-numeric: tabular-nums;
}
.rz-bms-nav-badge.is-critical { background: var(--rz-bms-bg-critical); color: var(--rz-bms-critical); }
.rz-bms-nav-badge.is-normal   { display: none; } /* hide zero/normal badges entirely */

/* ---------------------------------------------------------------------------
 * 5) Right inspector — selected-object detail (`spec §3 Inspector`).
 *    Pages mount the inspector at .rz-bms-inspector and the controller
 *    swaps content on click.
 * ---------------------------------------------------------------------------*/
.rz-bms-inspector {
  width: 320px;
  background: var(--rz-bms-panel);
  border-left: 1px solid var(--rz-bms-border);
  padding: var(--rz-bms-sp-4);
  overflow-y: auto;
  font-size: var(--rz-bms-fs-sm);
}
.rz-bms-inspector-empty {
  color: var(--rz-bms-text-muted);
  font-style: italic;
  padding: var(--rz-bms-sp-4) 0;
  text-align: center;
}
.rz-bms-inspector-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--rz-bms-sp-2);
  padding-bottom: var(--rz-bms-sp-3);
  border-bottom: 1px solid var(--rz-bms-border-faint);
  margin-bottom: var(--rz-bms-sp-3);
}
.rz-bms-inspector-title {
  font-size: var(--rz-bms-fs-md);
  font-weight: 700;
  color: var(--rz-bms-text);
  margin: 0;
}
.rz-bms-inspector-section {
  margin: var(--rz-bms-sp-4) 0;
}
.rz-bms-inspector-section-title {
  font-size: var(--rz-bms-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--rz-bms-text-muted);
  margin: 0 0 var(--rz-bms-sp-2) 0;
}
.rz-bms-kv {
  display: flex;
  justify-content: space-between;
  gap: var(--rz-bms-sp-3);
  padding: 4px 0;
  border-bottom: 1px dashed var(--rz-bms-border-faint);
}
.rz-bms-kv:last-child { border-bottom: 0; }
.rz-bms-kv-key { color: var(--rz-bms-text-muted); }
.rz-bms-kv-val { color: var(--rz-bms-text); font-variant-numeric: tabular-nums; }

/* ---------------------------------------------------------------------------
 * 6) KPI card (`spec §2 KPI Cards`).
 *    Anatomy: label + value + unit + target + trend + source.
 * ---------------------------------------------------------------------------*/
.rz-bms-kpi {
  background: var(--rz-bms-panel-raised);
  border: 1px solid var(--rz-bms-border-faint);
  border-radius: var(--rz-bms-r-md);
  padding: var(--rz-bms-sp-3) var(--rz-bms-sp-4);
  display: grid;
  grid-template-columns: 1fr auto;
  grid-row-gap: var(--rz-bms-sp-1);
}
.rz-bms-kpi.is-warn     { border-color: rgba(220, 163, 58, 0.45); }
.rz-bms-kpi.is-critical { border-color: rgba(217, 76, 76, 0.50); }
.rz-bms-kpi-label {
  grid-column: 1 / 2;
  color: var(--rz-bms-text-muted);
  font-size: var(--rz-bms-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.rz-bms-kpi-source {
  grid-column: 2 / 3;
  align-self: start;
  justify-self: end;
  font-size: var(--rz-bms-fs-xs);
  color: var(--rz-bms-text-muted);
}
.rz-bms-kpi-val {
  grid-column: 1 / 2;
  font-size: var(--rz-bms-fs-xl);
  font-weight: 700;
  color: var(--rz-bms-text);
  line-height: var(--rz-bms-lh-tight);
}
.rz-bms-kpi-unit {
  color: var(--rz-bms-text-dim);
  font-size: var(--rz-bms-fs-md);
  margin-left: 4px;
}
.rz-bms-kpi-target {
  grid-column: 1 / -1;
  color: var(--rz-bms-text-muted);
  font-size: var(--rz-bms-fs-xs);
  font-variant-numeric: tabular-nums;
}
.rz-bms-kpi-trend {
  grid-column: 2 / 3;
  align-self: end;
  justify-self: end;
  font-size: var(--rz-bms-fs-sm);
  font-variant-numeric: tabular-nums;
}
.rz-bms-kpi-trend.is-up   { color: var(--rz-bms-warn); }
.rz-bms-kpi-trend.is-down { color: var(--rz-bms-normal); }
.rz-bms-kpi-trend.is-flat { color: var(--rz-bms-text-muted); }

/* ---------------------------------------------------------------------------
 * 7) Alarm row (`spec §3 Shared Alarm Row`).
 *    severity | time | source | message | state | ack | action
 * ---------------------------------------------------------------------------*/
.rz-bms-alarm-row {
  display: grid;
  grid-template-columns: 78px 86px 110px 1fr 80px 70px;
  gap: var(--rz-bms-sp-3);
  align-items: center;
  padding: var(--rz-bms-sp-2) var(--rz-bms-sp-3);
  border-bottom: 1px solid var(--rz-bms-border-faint);
  font-size: var(--rz-bms-fs-sm);
}
.rz-bms-alarm-row:last-child { border-bottom: 0; }
.rz-bms-alarm-sev { font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; font-size: var(--rz-bms-fs-xs); }
.rz-bms-alarm-sev.is-critical { color: var(--rz-bms-critical); }
.rz-bms-alarm-sev.is-warn     { color: var(--rz-bms-warn); }
.rz-bms-alarm-sev.is-trouble  { color: var(--rz-bms-trouble); }
.rz-bms-alarm-sev.is-stale    { color: var(--rz-bms-stale); }
.rz-bms-alarm-time   { font-family: var(--rz-bms-font-mono); color: var(--rz-bms-text-muted); font-variant-numeric: tabular-nums; }
.rz-bms-alarm-source { color: var(--rz-bms-text-dim); }
.rz-bms-alarm-msg    { color: var(--rz-bms-text); }
.rz-bms-alarm-state  { font-weight: 700; }
.rz-bms-alarm-ack {
  font: inherit;
  padding: 4px 8px;
  border-radius: var(--rz-bms-r-sm);
  border: 1px solid var(--rz-bms-border);
  background: transparent;
  color: var(--rz-bms-text-dim);
  cursor: pointer;
}
.rz-bms-alarm-ack:hover { background: var(--rz-bms-panel-raised); color: var(--rz-bms-text); }
.rz-bms-alarm-ack:focus-visible { outline: 2px solid var(--rz-bms-selected); outline-offset: 2px; }

/* ---------------------------------------------------------------------------
 * 8) Layer toggles — for diagrams (room layout / cooling / SLD / network).
 *    `.rz-bms-layer-toolbar` hosts toggle buttons; one button per layer.
 * ---------------------------------------------------------------------------*/
.rz-bms-layer-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--rz-bms-sp-1);
  padding: var(--rz-bms-sp-2);
  background: var(--rz-bms-panel-raised);
  border: 1px solid var(--rz-bms-border-faint);
  border-radius: var(--rz-bms-r-md);
  font-size: var(--rz-bms-fs-xs);
}
.rz-bms-layer-btn {
  font: inherit;
  padding: 4px 10px;
  border-radius: var(--rz-bms-r-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--rz-bms-text-dim);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
  transition: color var(--rz-bms-tx-fast), background var(--rz-bms-tx-fast), border-color var(--rz-bms-tx-fast);
}
.rz-bms-layer-btn:hover { color: var(--rz-bms-text); background: rgba(255,255,255,0.04); }
.rz-bms-layer-btn[aria-pressed="true"] {
  color: var(--rz-bms-selected);
  border-color: var(--rz-bms-selected);
  background: var(--rz-bms-bg-selected);
}
.rz-bms-layer-btn:focus-visible { outline: 2px solid var(--rz-bms-selected); outline-offset: 2px; }

/* ---------------------------------------------------------------------------
 * 9) Bottom event/trend strip.
 * ---------------------------------------------------------------------------*/
.rz-bms-events {
  background: var(--rz-bms-panel);
  border-top: 1px solid var(--rz-bms-border);
  padding: var(--rz-bms-sp-3) var(--rz-bms-sp-4);
  font-size: var(--rz-bms-fs-sm);
}
.rz-bms-events-title {
  font-size: var(--rz-bms-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--rz-bms-text-muted);
  margin: 0 0 var(--rz-bms-sp-2) 0;
}

/* ---------------------------------------------------------------------------
 * 10) Utility helpers.
 * ---------------------------------------------------------------------------*/
body.rz-bms-shell .rz-bms-muted    { color: var(--rz-bms-text-muted); }
body.rz-bms-shell .rz-bms-dim      { color: var(--rz-bms-text-dim); }
body.rz-bms-shell .rz-bms-unit     { color: var(--rz-bms-text-dim); font-size: 0.85em; font-weight: 400; }
body.rz-bms-shell .rz-bms-divider  { border-top: 1px solid var(--rz-bms-border-faint); margin: var(--rz-bms-sp-3) 0; }
body.rz-bms-shell .rz-bms-mono     { font-family: var(--rz-bms-font-mono); font-variant-numeric: tabular-nums; }

/* Visually hide but keep accessible (for screen readers) */
body.rz-bms-shell .rz-bms-sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* Skip link for keyboard users — every shell page should have one. */
body.rz-bms-shell .rz-bms-skip {
  position: absolute; top: -40px; left: 8px;
  background: var(--rz-bms-selected); color: var(--rz-bms-bg);
  padding: 8px 14px; border-radius: var(--rz-bms-r-sm);
  font-weight: 700; z-index: 10000;
  transition: top var(--rz-bms-tx-fast);
}
body.rz-bms-shell .rz-bms-skip:focus { top: 8px; }

/* ---------------------------------------------------------------------------
 * 11) Responsive: collapse left nav under 900 px; collapse inspector under 1180.
 * ---------------------------------------------------------------------------*/
@media (max-width: 1180px) {
  .rz-bms-inspector {
    width: 100%;
    max-width: 100%;
    border-left: 0;
    border-top: 1px solid var(--rz-bms-border);
  }
}
@media (max-width: 900px) {
  .rz-bms-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    max-width: 100%;
    min-width: 0;
    border-right: 0;
    border-bottom: 1px solid var(--rz-bms-border);
    padding: var(--rz-bms-sp-2);
  }
  .rz-bms-nav-section { display: none; }
  .rz-bms-alarm-row {
    grid-template-columns: 64px 1fr;
    grid-row-gap: 2px;
  }
  .rz-bms-alarm-row > * { grid-column: 2 / 3; }
  .rz-bms-alarm-row > .rz-bms-alarm-sev { grid-column: 1 / 2; grid-row: 1 / span 5; }
}
