.zrsld-app {
  --zrsld-charcoal: #20272d;
  --zrsld-charcoal-2: #2e3840;
  --zrsld-muted: #69757e;
  --zrsld-line: #d8dde2;
  --zrsld-line-strong: #b9c1c7;
  --zrsld-panel: #ffffff;
  --zrsld-canvas: #f9fafb;
  --zrsld-soft: #f1f4f6;
  --zrsld-accent: #e95d2a;
  --zrsld-accent-dark: #bd3d15;
  --zrsld-accent-soft: #fff0e9;
  --zrsld-danger: #b6312c;
  --zrsld-success: #16734d;
  --zrsld-info: #246b9a;
  --zrsld-shadow: 0 14px 40px rgba(22, 30, 35, 0.15);
  position: relative;
  width: 100%;
  min-width: 0;
  height: var(--zrsld-app-height, calc(100vh - 96px));
  min-height: 640px;
  color: var(--zrsld-charcoal);
  background: var(--zrsld-canvas);
  border: 1px solid var(--zrsld-line);
  border-radius: 10px;
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  line-height: 1.4;
  isolation: isolate;
}

.zrsld-app *,
.zrsld-app *::before,
.zrsld-app *::after { box-sizing: border-box; }
.zrsld-app button,
.zrsld-app input,
.zrsld-app select,
.zrsld-app textarea { margin: 0; font: inherit; letter-spacing: normal; text-transform: none; }
.zrsld-app button { min-height: 0; }
.zrsld-app h1,
.zrsld-app h2,
.zrsld-app h3,
.zrsld-app p { margin: 0; }

.zrsld-loading,
.zrsld-inline-loading,
.zrsld-busy-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.zrsld-loading { height: 100%; color: var(--zrsld-muted); }
.zrsld-loading__spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(233, 93, 42, 0.25);
  border-top-color: var(--zrsld-accent);
  border-radius: 50%;
  animation: zrsld-spin 0.75s linear infinite;
}
@keyframes zrsld-spin { to { transform: rotate(360deg); } }

.zrsld-shell {
  width: 100%;
  height: 100%;
  min-width: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  background: var(--zrsld-panel);
}

.zrsld-topbar {
  position: relative;
  z-index: 30;
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  background: var(--zrsld-charcoal);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.16);
  overflow: hidden;
}
.zrsld-brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-right: 8px;
  border-right: 1px solid rgba(255,255,255,.15);
}
.zrsld-brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--zrsld-accent);
  color: #fff;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: .5px;
}
.zrsld-brand div { display: grid; white-space: nowrap; line-height: 1.15; }
.zrsld-brand strong { font-size: 13px; }
.zrsld-brand small { color: #bfc8ce; font-size: 10px; }
.zrsld-mode-group,
.zrsld-edit-group,
.zrsld-view-group,
.zrsld-file-group,
.zrsld-more-group { display: flex; flex: 0 0 auto; align-items: center; gap: 3px; }
.zrsld-mode-group,
.zrsld-edit-group,
.zrsld-view-group { padding-right: 8px; border-right: 1px solid rgba(255,255,255,.14); }
.zrsld-file-group { margin-left: auto; }
.zrsld-connection-kind {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 5px;
  color: #cbd2d7;
  font-size: 10px;
  padding-right: 8px;
  border-right: 1px solid rgba(255,255,255,.14);
  white-space: nowrap;
}
.zrsld-connection-kind select {
  width: 124px;
  height: 32px;
  border: 1px solid #55616a;
  border-radius: 6px;
  padding: 0 24px 0 8px;
  color: #fff;
  background: var(--zrsld-charcoal-2);
}

.zrsld-button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--zrsld-line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--zrsld-charcoal);
  font-size: 11px;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: none;
  transition: background .15s ease, border-color .15s ease, color .15s ease, transform .08s ease;
}
.zrsld-button:hover:not(:disabled) { background: #f7f8f9; border-color: #929da5; }
.zrsld-button:active:not(:disabled) { transform: translateY(1px); }
.zrsld-button:focus-visible { outline: 2px solid var(--zrsld-accent); outline-offset: 2px; }
.zrsld-button:disabled { opacity: .42; cursor: not-allowed; }
.zrsld-button.is-compact { width: 32px; min-width: 32px; padding: 0; }
.zrsld-button.is-primary { color: #fff; background: var(--zrsld-accent); border-color: var(--zrsld-accent); }
.zrsld-button.is-primary:hover:not(:disabled) { color: #fff; background: var(--zrsld-accent-dark); border-color: var(--zrsld-accent-dark); }
.zrsld-button.is-active { color: #fff; background: var(--zrsld-accent); border-color: var(--zrsld-accent); }
.zrsld-topbar .zrsld-button {
  color: #e7ecef;
  background: #303b43;
  border-color: #48545d;
}
.zrsld-topbar .zrsld-button:hover:not(:disabled) { color: #fff; background: #3a4650; border-color: #687680; }
.zrsld-topbar .zrsld-button.is-active,
.zrsld-topbar .zrsld-button.is-primary { color: #fff; background: var(--zrsld-accent); border-color: var(--zrsld-accent); }
.zrsld-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  overflow: visible;
}
.zrsld-icon path { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.zrsld-workspace { min-height: 0; min-width: 0; display: flex; background: var(--zrsld-canvas); }
.zrsld-palette {
  position: relative;
  z-index: 15;
  flex: 0 0 266px;
  width: 266px;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-right: 1px solid var(--zrsld-line);
  box-shadow: 4px 0 12px rgba(25, 32, 36, .045);
}
.zrsld-palette > header {
  min-height: 51px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 9px 8px 12px;
  border-bottom: 1px solid var(--zrsld-line);
}
.zrsld-palette > header div { display: grid; }
.zrsld-palette > header strong { font-size: 13px; }
.zrsld-palette > header small { color: var(--zrsld-muted); font-size: 10px; }
.zrsld-palette.is-collapsed {
  flex-basis: 44px;
  width: 44px;
  align-items: center;
  padding-top: 8px;
}
.zrsld-palette.is-collapsed > span {
  margin-top: 9px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  color: var(--zrsld-muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.zrsld-palette__controls { display: grid; gap: 8px; padding: 9px; border-bottom: 1px solid var(--zrsld-line); }
.zrsld-palette__controls input,
.zrsld-palette__controls select,
.zrsld-field input,
.zrsld-field select,
.zrsld-field textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--zrsld-line-strong);
  border-radius: 6px;
  padding: 7px 8px;
  color: var(--zrsld-charcoal);
  background: #fff;
  box-shadow: none;
}
.zrsld-palette__controls input,
.zrsld-palette__controls select { height: 34px; }
.zrsld-palette__controls input:focus,
.zrsld-palette__controls select:focus,
.zrsld-field input:focus,
.zrsld-field select:focus,
.zrsld-field textarea:focus { outline: 2px solid rgba(233,93,42,.24); border-color: var(--zrsld-accent); }
.zrsld-palette__controls label { display: grid; gap: 3px; }
.zrsld-palette__controls label span { color: var(--zrsld-muted); font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: .4px; }
.zrsld-palette__list { min-height: 0; overflow-y: auto; padding-bottom: 10px; }
.zrsld-palette-category > button {
  width: 100%;
  min-height: 33px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 11px;
  border: 0;
  border-bottom: 1px solid #edf0f2;
  background: #f8f9fa;
  color: var(--zrsld-charcoal-2);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .35px;
  text-transform: uppercase;
  cursor: pointer;
}
.zrsld-palette-category > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 5px; padding: 6px; }
.zrsld-palette-item {
  min-width: 0;
  min-height: 84px;
  display: grid;
  grid-template-rows: 48px auto;
  align-items: center;
  justify-items: center;
  gap: 3px;
  padding: 6px 4px;
  border: 1px solid #e1e5e8;
  border-radius: 7px;
  background: #fff;
  color: var(--zrsld-charcoal);
  cursor: grab;
}
.zrsld-palette-item:hover { border-color: var(--zrsld-accent); background: var(--zrsld-accent-soft); }
.zrsld-palette-item:active { cursor: grabbing; }
.zrsld-palette-item > span:last-child { min-width: 0; display: grid; text-align: center; line-height: 1.15; }
.zrsld-palette-item strong { max-width: 112px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 9.5px; }
.zrsld-palette-item small { color: var(--zrsld-muted); font-size: 8px; }
.zrsld-palette-symbol { width: 54px; height: 46px; display: grid; place-items: center; color: var(--zrsld-charcoal); }
.zrsld-palette-symbol .zrsld-symbol-svg { max-width: 49px; max-height: 43px; width: auto; height: auto; overflow: visible; }

.zrsld-canvas-panel { position: relative; min-width: 0; min-height: 0; flex: 1 1 auto; overflow: hidden; background: var(--zrsld-canvas); }
.zrsld-canvas-panel .react-flow { background: var(--zrsld-canvas); }
.zrsld-canvas-panel .react-flow__pane { cursor: default; }
.zrsld-canvas-panel .react-flow__pane.dragging { cursor: grabbing; }
.zrsld-canvas-panel .react-flow__background line { stroke: #e2e6e9; }
.zrsld-canvas-panel .react-flow__controls {
  overflow: hidden;
  border: 1px solid var(--zrsld-line);
  border-radius: 7px;
  box-shadow: 0 5px 18px rgba(20,28,33,.1);
}
.zrsld-canvas-panel .react-flow__controls-button { width: 29px; height: 29px; border-color: var(--zrsld-line); background: #fff; }
.zrsld-canvas-panel .react-flow__controls-button:hover { background: var(--zrsld-soft); }
.zrsld-canvas-panel .react-flow__minimap { border: 1px solid var(--zrsld-line); border-radius: 7px; overflow: hidden; box-shadow: 0 5px 18px rgba(20,28,33,.1); }
.zrsld-canvas-panel .react-flow__attribution { z-index: 8; right: 4px; bottom: 31px; margin: 0; border-radius: 3px; background: rgba(255,255,255,.82); font-size: 9px; }
.zrsld-canvas-panel .react-flow__attribution a { color: #7b858c; }
.zrsld-canvas-panel .react-flow__selection { background: rgba(233,93,42,.08); border: 1px dashed var(--zrsld-accent); }
.zrsld-canvas-panel .react-flow__node { background: transparent; border: 0; box-shadow: none; }
.zrsld-canvas-panel .react-flow__node:focus-visible { outline: none; }
.zrsld-canvas-panel .react-flow__node:focus-visible .zrsld-equipment-node { outline: 2px solid var(--zrsld-accent); outline-offset: 5px; }

.zrsld-voltage-zone {
  position: relative;
  pointer-events: none;
  border-top: 1px solid #d9dee2;
  border-bottom: 1px solid rgba(217,222,226,.42);
  background: rgba(239,243,246,.58);
}
.zrsld-voltage-zone.is-even { background: rgba(249,250,251,.78); }
.zrsld-voltage-zone__label {
  position: absolute;
  left: 12px;
  top: 10px;
  display: flex;
  align-items: baseline;
  gap: 7px;
  color: #77828a;
  pointer-events: none;
  user-select: none;
}
.zrsld-voltage-zone__label strong { font-size: 11px; letter-spacing: .4px; text-transform: uppercase; }
.zrsld-voltage-zone__label span { font-size: 9px; }

.zrsld-equipment-node {
  position: relative;
  color: var(--zrsld-charcoal);
  cursor: grab;
  user-select: none;
}
.zrsld-equipment-node.is-locked { cursor: not-allowed; }
.zrsld-equipment-node.is-operable { cursor: pointer; }
.zrsld-equipment-node.is-operable::before {
  content: "";
  position: absolute;
  inset: -9px;
  border: 1px dashed rgba(233,93,42,.62);
  border-radius: 8px;
  background: rgba(255,240,233,.18);
  pointer-events: none;
}
.zrsld-equipment-node.is-selected::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 2px solid var(--zrsld-accent);
  border-radius: 7px;
  box-shadow: 0 0 0 3px rgba(233,93,42,.12);
  pointer-events: none;
}
.zrsld-equipment-node.is-open { color: #b33a30; }
.zrsld-equipment-node.is-out-of-service { opacity: .38; filter: grayscale(.7); }
.zrsld-symbol-svg { display: block; overflow: visible; color: inherit; }
.zrsld-symbol-strokes > * {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.zrsld-symbol-strokes .zrsld-symbol__contact { fill: currentColor; stroke: none; }
.zrsld-symbol-strokes .zrsld-symbol__state-mark { stroke-width: 1.5; }
.zrsld-symbol-strokes .zrsld-symbol__aux { stroke-width: 1.4; fill: none; }
.zrsld-symbol-strokes .zrsld-symbol__main-letter { font: 700 19px Arial, sans-serif; fill: currentColor; stroke: none; }
.zrsld-symbol-strokes .zrsld-symbol__small { font: 700 11px Arial, sans-serif; fill: currentColor; stroke: none; }
.zrsld-symbol-strokes .zrsld-symbol__tiny { font: 700 8px Arial, sans-serif; fill: currentColor; stroke: none; }
.zrsld-node-label {
  position: absolute;
  min-width: 140px;
  transform: translateY(-50%);
  display: grid;
  justify-items: start;
  gap: 1px;
  color: var(--zrsld-charcoal);
  text-align: left;
  line-height: 1.15;
  pointer-events: none;
  white-space: nowrap;
  z-index: 2;
}

.zrsld-node-label.is-bus { min-width: 0; justify-items: start; text-align: left; }
.zrsld-node-label strong { font-size: 10px; font-weight: 800; }
.zrsld-node-label span { max-width: 190px; color: var(--zrsld-muted); font-size: 8.5px; overflow: hidden; text-overflow: ellipsis; }
.zrsld-node-state {
  position: absolute;
  top: -3px;
  padding: 2px 4px;
  border-radius: 4px;
  color: #fff;
  background: #68757e;
  font-size: 7px;
  font-weight: 800;
  letter-spacing: .4px;
  line-height: 1;
  text-transform: uppercase;
  pointer-events: none;
}
.zrsld-equipment-node.is-open .zrsld-node-state { background: var(--zrsld-danger); }
.zrsld-equipment-node.is-closed .zrsld-node-state { background: var(--zrsld-success); }
.zrsld-terminal-handle.react-flow__handle {
  width: 12px;
  height: 12px;
  min-width: 12px;
  min-height: 12px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--zrsld-accent);
  box-shadow: 0 0 0 1px var(--zrsld-accent), 0 2px 5px rgba(20,28,33,.22);
  opacity: 0;
  pointer-events: none;
  transition: opacity .12s ease, transform .12s ease;
  z-index: 7;
}
.zrsld-terminal-handle.is-visible { opacity: 1; pointer-events: all; }
.zrsld-terminal-handle.is-visible:hover { transform: translate(-50%, -50%) scale(1.35) !important; }
.zrsld-terminal-handle.is-measurement { background: var(--zrsld-info); box-shadow: 0 0 0 1px var(--zrsld-info); }
.zrsld-terminal-handle.is-control { background: var(--zrsld-danger); box-shadow: 0 0 0 1px var(--zrsld-danger); }
.zrsld-terminal-handle.is-earth { background: var(--zrsld-success); box-shadow: 0 0 0 1px var(--zrsld-success); }

.react-flow__edge-path.zrsld-electrical-edge { fill: none; stroke: #313a40; stroke-width: 2; stroke-linecap: square; stroke-linejoin: round; }
.react-flow__edge-path.zrsld-electrical-edge.is-cable { stroke-width: 3.5; }
.react-flow__edge-path.zrsld-electrical-edge.is-overhead-line { stroke-width: 2; stroke-dasharray: 12 3 2 3; }
.react-flow__edge-path.zrsld-electrical-edge.is-measurement { stroke: var(--zrsld-info); stroke-width: 1.5; stroke-dasharray: 7 5; }
.react-flow__edge-path.zrsld-electrical-edge.is-control { stroke: var(--zrsld-danger); stroke-width: 1.5; stroke-dasharray: 3 4; }
.react-flow__edge-path.zrsld-electrical-edge.is-out-of-service { opacity: .35; }
.react-flow__edge-path.zrsld-electrical-edge.is-selected { stroke: var(--zrsld-accent); stroke-width: 3.5; }
.zrsld-edge-label {
  position: absolute;
  padding: 2px 5px;
  border: 1px solid var(--zrsld-line);
  border-radius: 4px;
  color: var(--zrsld-charcoal);
  background: rgba(255,255,255,.94);
  font-size: 8.5px;
  font-weight: 650;
  pointer-events: all;
  white-space: nowrap;
}

.zrsld-statusbar {
  position: absolute;
  z-index: 12;
  left: 0;
  right: 0;
  bottom: 0;
  min-height: 28px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 4px 8px;
  border-top: 1px solid var(--zrsld-line);
  background: rgba(255,255,255,.94);
  color: var(--zrsld-muted);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  font-size: 9.5px;
  white-space: nowrap;
  overflow-x: auto;
}
.zrsld-statusbar__spacer { flex: 1 1 auto; }
.zrsld-mode-indicator { padding: 2px 5px; border-radius: 4px; background: #dfe4e7; color: var(--zrsld-charcoal); font-weight: 800; text-transform: uppercase; letter-spacing: .35px; }
.zrsld-mode-indicator.is-connect { color: #fff; background: var(--zrsld-info); }
.zrsld-mode-indicator.is-operate { color: #fff; background: var(--zrsld-accent); }
.zrsld-validation { border: 0; padding: 0; background: none; font-size: inherit; font-weight: 700; }
.zrsld-validation.is-valid { color: var(--zrsld-success); }
.zrsld-validation.is-error { color: var(--zrsld-danger); cursor: pointer; }

.zrsld-modal-backdrop {
  position: absolute;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(18,24,28,.55);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
}
.zrsld-modal {
  width: min(560px, 100%);
  max-height: calc(100% - 10px);
  display: grid;
  grid-template-rows: auto minmax(0,1fr) auto;
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--zrsld-shadow);
  overflow: hidden;
}
.zrsld-modal.is-large { width: min(860px, 100%); }
.zrsld-modal.is-small { width: min(420px, 100%); }
.zrsld-modal__header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 15px 17px; border-bottom: 1px solid var(--zrsld-line); }
.zrsld-modal__header h2 { font-size: 16px; line-height: 1.25; }
.zrsld-modal__header p { margin-top: 3px; color: var(--zrsld-muted); font-size: 10px; }
.zrsld-modal__body { min-height: 0; overflow-y: auto; padding: 16px 17px; }
.zrsld-modal__footer { display: flex; align-items: center; gap: 7px; padding: 10px 17px; border-top: 1px solid var(--zrsld-line); background: #f8f9fa; }
.zrsld-modal__spacer { flex: 1 1 auto; }
.zrsld-property-form { display: grid; gap: 14px; }
.zrsld-property-form fieldset { min-width: 0; margin: 0; padding: 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; }
.zrsld-property-form legend { padding: 0 5px; color: var(--zrsld-charcoal-2); font-size: 11px; font-weight: 800; }
.zrsld-property-form legend span { color: var(--zrsld-muted); font-weight: 500; }
.zrsld-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 12px; }
.zrsld-field { min-width: 0; display: grid; align-content: start; gap: 4px; }
.zrsld-field.is-wide { grid-column: 1 / -1; }
.zrsld-field__label { color: #4f5b63; font-size: 9.5px; font-weight: 750; }
.zrsld-field small { color: var(--zrsld-muted); font-size: 9px; }
.zrsld-field textarea { resize: vertical; min-height: 68px; }
.zrsld-input-unit { display: flex; min-width: 0; }
.zrsld-input-unit input { min-width: 0; border-radius: 6px 0 0 6px; }
.zrsld-input-unit span { display: grid; place-items: center; min-width: 44px; padding: 0 7px; border: 1px solid var(--zrsld-line-strong); border-left: 0; border-radius: 0 6px 6px 0; color: var(--zrsld-muted); background: #f4f6f7; font-size: 9px; }
.zrsld-check-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; margin-top: 4px; }
.zrsld-check-grid label { display: flex; align-items: center; gap: 6px; padding: 7px 8px; border: 1px solid var(--zrsld-line); border-radius: 6px; background: #fafbfb; font-size: 10px; }
.zrsld-check-grid input { width: 15px; height: 15px; accent-color: var(--zrsld-accent); }
.zrsld-state-fields { margin-top: 10px; }
.zrsld-note { padding: 9px 10px; border-left: 3px solid var(--zrsld-info); color: var(--zrsld-muted); background: #f2f7fa; font-size: 10px; }
.zrsld-help-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.zrsld-help-grid section { padding: 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; background: #fafbfb; }
.zrsld-help-grid h3 { margin-bottom: 4px; font-size: 11px; }
.zrsld-help-grid p { color: var(--zrsld-muted); font-size: 10px; }
.zrsld-help-grid kbd { padding: 1px 4px; border: 1px solid var(--zrsld-line-strong); border-bottom-width: 2px; border-radius: 3px; background: #fff; font: 700 9px ui-monospace, monospace; }

.zrsld-level-list { display: grid; gap: 8px; }
.zrsld-level-row { display: grid; grid-template-columns: 30px minmax(0,1.25fr) minmax(0,1fr) auto; align-items: end; gap: 9px; padding: 9px; border: 1px solid var(--zrsld-line); border-radius: 8px; }
.zrsld-level-row__order { align-self: center; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: #fff; background: var(--zrsld-charcoal-2); font-weight: 800; }
.zrsld-level-row__actions { display: flex; gap: 3px; }

.zrsld-server-list { display: grid; gap: 8px; }
.zrsld-server-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; }
.zrsld-server-row.is-current { border-color: var(--zrsld-accent); box-shadow: inset 3px 0 0 var(--zrsld-accent); }
.zrsld-server-row h3 { font-size: 11px; }
.zrsld-server-row p { margin-top: 3px; color: var(--zrsld-muted); font-size: 9.5px; }
.zrsld-server-row > div:last-child { display: flex; gap: 5px; }
.zrsld-text-button { border: 0; padding: 0 0 10px; color: var(--zrsld-info); background: transparent; font-weight: 700; cursor: pointer; }
.zrsld-empty-state { display: grid; justify-items: center; gap: 5px; padding: 34px; border: 1px dashed var(--zrsld-line-strong); border-radius: 8px; text-align: center; }
.zrsld-empty-state p { color: var(--zrsld-muted); }
.zrsld-inline-loading { min-height: 120px; color: var(--zrsld-muted); }
.zrsld-alert { margin-bottom: 10px; padding: 9px 11px; border-radius: 6px; }
.zrsld-alert.is-error { color: #7c201c; background: #fbeceb; border: 1px solid #efc5c2; }

.zrsld-toast {
  position: absolute;
  z-index: 1200;
  right: 16px;
  bottom: 42px;
  max-width: min(430px, calc(100% - 32px));
  padding: 10px 13px;
  border-radius: 7px;
  color: #fff;
  background: var(--zrsld-charcoal-2);
  box-shadow: 0 8px 25px rgba(17,23,27,.22);
  font-size: 11px;
  font-weight: 650;
}
.zrsld-toast.is-success { background: var(--zrsld-success); }
.zrsld-toast.is-error { background: var(--zrsld-danger); }
.zrsld-toast.is-info { background: var(--zrsld-info); }
.zrsld-busy-cover { position: absolute; z-index: 1100; inset: 0; color: #fff; background: rgba(20,27,31,.42); -webkit-backdrop-filter: blur(1px); backdrop-filter: blur(1px); font-weight: 700; }

.zrsld-startup-error {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 10px;
  padding: 30px;
  color: var(--zrsld-charcoal);
  background: #fff;
  text-align: center;
}
.zrsld-startup-error h2 { font-size: 19px; }
.zrsld-startup-error p { max-width: 700px; color: var(--zrsld-muted); }
.zrsld-startup-error__detail { padding: 10px 12px; border: 1px solid var(--zrsld-line); border-radius: 7px; background: #f7f8f9; font-family: ui-monospace, monospace; font-size: 10px; }

@media (max-width: 1320px) {
  .zrsld-topbar { gap: 5px; }
  .zrsld-topbar .zrsld-file-group .zrsld-button span { display: none; }
  .zrsld-topbar .zrsld-file-group .zrsld-button { width: 32px; min-width: 32px; padding: 0; }
  .zrsld-palette { flex-basis: 242px; width: 242px; }
}
@media (max-width: 900px) {
  .zrsld-app { min-height: 600px; border-radius: 0; }
  .zrsld-brand div { display: none; }
  .zrsld-palette { flex-basis: 220px; width: 220px; }
  .zrsld-palette-category > div { grid-template-columns: 1fr; }
  .zrsld-form-grid,
  .zrsld-help-grid { grid-template-columns: 1fr; }
  .zrsld-check-grid { grid-template-columns: 1fr 1fr; }
  .zrsld-level-row { grid-template-columns: 28px 1fr; }
  .zrsld-level-row__actions { grid-column: 2; }
  .zrsld-modal-backdrop { padding: 8px; }
}
@media (max-width: 640px) {
  .zrsld-palette:not(.is-collapsed) { position: absolute; inset: 0 auto 0 0; width: min(280px, 86%); z-index: 40; }
  .zrsld-check-grid { grid-template-columns: 1fr; }
  .zrsld-server-row { align-items: flex-start; flex-direction: column; }
}
@media print {
  .zrsld-topbar,
  .zrsld-palette,
  .zrsld-statusbar,
  .react-flow__controls,
  .react-flow__minimap,
  .react-flow__attribution { display: none !important; }
  .zrsld-app { height: 100vh; border: 0; border-radius: 0; }
}

/* v1.3.5 professional engineering presentation and local IEC-aligned SVG assets. */
.zrsld-symbol-strokes > image {
  pointer-events: none;
  user-select: none;
}
.zrsld-shell.is-pan-mode .zrsld-canvas-panel .react-flow__pane { cursor: grab; }
.zrsld-shell.is-pan-mode .zrsld-canvas-panel .react-flow__pane.dragging { cursor: grabbing; }
.zrsld-shell.is-pan-mode .zrsld-equipment-node { cursor: grab; }
.zrsld-mode-indicator.is-pan { color: #fff; background: #526a7a; }

.zrsld-overview {
  position: absolute;
  z-index: 23;
  right: 12px;
  bottom: 38px;
  width: 208px;
  border: 1px solid #4f5c65;
  border-radius: 9px;
  overflow: hidden;
  color: #fff;
  background: rgba(32,39,45,.96);
  box-shadow: 0 10px 28px rgba(20,28,33,.25);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.zrsld-overview > header {
  height: 27px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7px 0 9px;
  border-bottom: 1px solid rgba(255,255,255,.14);
  font-size: 9px;
  letter-spacing: .3px;
  text-transform: uppercase;
}
.zrsld-overview > header button {
  appearance: none;
  width: 22px;
  height: 22px;
  border: 0;
  border-radius: 4px;
  color: #dfe6ea;
  background: transparent;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
}
.zrsld-overview > header button:hover { color: #fff; background: rgba(255,255,255,.1); }
.zrsld-overview svg {
  display: block;
  width: 100%;
  height: 132px;
  cursor: crosshair;
  touch-action: none;
}
.zrsld-overview__surface { fill: #273139; }
.zrsld-overview__equipment {
  fill: rgba(230,237,241,.74);
  stroke: #e8eef2;
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
}
.zrsld-overview__equipment.is-switchgear { fill: #f1a37e; stroke: #ffbea0; }
.zrsld-overview__equipment.is-open { fill: transparent; stroke-dasharray: 8 5; }
.zrsld-overview__equipment.is-out,
.zrsld-overview__bus.is-out { opacity: .3; }
.zrsld-overview__bus {
  stroke: #e8eef2;
  stroke-width: 7;
  stroke-linecap: square;
  vector-effect: non-scaling-stroke;
}
.zrsld-overview__viewport {
  fill: rgba(233,93,42,.13);
  stroke: #ff7b45;
  stroke-width: 3;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

@media (max-width: 760px) {
  .zrsld-overview { width: 176px; }
  .zrsld-overview svg { height: 110px; }
}

@media print {
  .zrsld-overview { display: none !important; }
}


/* v1.3.5 professional SLD presentation overrides. */
.zrsld-canvas-panel,
.zrsld-canvas-panel .react-flow { background: #fff; }
.zrsld-canvas-panel .react-flow__background-pattern.dots { fill: #d7dce0; }
.zrsld-canvas-panel .react-flow__background-pattern.lines { stroke: #edf0f2; }

.zrsld-voltage-zone {
  position: relative;
  pointer-events: none;
  border: 0;
  background: transparent !important;
}
.zrsld-voltage-zone__rule {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: #cfd5da;
}
.zrsld-voltage-zone__label {
  position: absolute;
  left: var(--zrsld-zone-label-left, 18px);
  top: 12px;
  min-width: 148px;
  display: grid;
  gap: 2px;
  padding: 7px 11px 7px 13px;
  border: 1px solid #d7dde1;
  border-left: 3px solid var(--zrsld-accent);
  border-radius: 4px;
  color: #293238;
  background: rgba(255,255,255,.96);
  box-shadow: 0 1px 2px rgba(22,31,37,.04);
}
.zrsld-voltage-zone__label span {
  color: #8a949b;
  font-size: 7px;
  font-weight: 800;
  letter-spacing: 1.05px;
  line-height: 1;
}
.zrsld-voltage-zone__label strong {
  color: #293238;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .15px;
  line-height: 1.15;
  text-transform: none;
}

.zrsld-equipment-node { color: #20282e; }
.zrsld-equipment-node.is-open { color: #20282e; }
.zrsld-equipment-node.is-operating-view.is-open { color: #b13d32; }
.zrsld-equipment-node.is-operating-view.is-closed { color: #1f6a4c; }
.zrsld-equipment-node.is-busbar { color: #12191e; }
.zrsld-symbol-strokes > * { stroke-width: 2.25; stroke-linecap: square; stroke-linejoin: miter; }
.zrsld-equipment-node.is-busbar .zrsld-symbol-strokes > * { stroke-width: 4.2; }

.zrsld-node-label {
  min-width: 154px;
  gap: 2px;
  padding: 4px 7px 5px;
  border-left: 2px solid rgba(32,40,46,.28);
  border-radius: 2px;
  color: #20282e;
  background: rgba(255,255,255,.93);
  box-shadow: 0 1px 0 rgba(32,40,46,.05);
  line-height: 1.12;
  transform-origin: left center;
}
.zrsld-node-label.is-bus {
  min-width: 176px;
  padding: 4px 7px 5px;
  border-left-color: #20282e;
  transform-origin: left bottom;
}
.zrsld-node-label {
  pointer-events: none;
}
.zrsld-node-label.is-left {
  border-left: 0;
  border-right: 2px solid rgba(32,40,46,.28);
  text-align: right;
}
.zrsld-node-label.is-top,
.zrsld-node-label.is-bottom {
  min-width: 132px;
  text-align: center;
  border-left: 0;
  border-top: 2px solid rgba(32,40,46,.28);
}
.zrsld-node-label.is-top {
  box-shadow: 0 1px 0 rgba(32,40,46,.04);
}
.zrsld-node-label.is-bottom {
  box-shadow: 0 -1px 0 rgba(32,40,46,.04);
}
.zrsld-node-label strong {
  color: #20282e;
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: .08px;
}
.zrsld-node-label span {
  max-width: 220px;
  color: #647078;
  font-size: 9.2px;
  font-weight: 550;
}
.zrsld-equipment-node.is-low-detail .zrsld-node-label { background: rgba(255,255,255,.98); }
.zrsld-equipment-node.is-low-detail .zrsld-node-label strong { font-weight: 850; }

.zrsld-node-state {
  top: -7px;
  padding: 3px 5px;
  border: 1px solid rgba(255,255,255,.9);
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(20,28,33,.12);
  font-size: 7.5px;
  letter-spacing: .5px;
}
.zrsld-equipment-node.is-open .zrsld-node-state { background: #b13d32; }
.zrsld-equipment-node.is-closed .zrsld-node-state { background: #1f6a4c; }

.react-flow__edge-path.zrsld-electrical-edge {
  stroke: #20282e;
  stroke-width: 2.25;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.react-flow__edge-path.zrsld-electrical-edge.is-selected { stroke: var(--zrsld-accent); stroke-width: 3.25; }
.zrsld-edge-label {
  padding: 3px 6px;
  border: 1px solid #d4dade;
  border-radius: 3px;
  background: rgba(255,255,255,.97);
  box-shadow: 0 1px 2px rgba(20,28,33,.06);
  font-size: 9px;
}

.zrsld-symbol-halo { fill: #fff; stroke: none; }


/* v1.4.2 — continuous busbar landing geometry. */
.zrsld-bus-taps .zrsld-bus-tap {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.25;
  stroke-linecap: square;
  stroke-linejoin: miter;
  vector-effect: non-scaling-stroke;
}
.zrsld-bus-taps .zrsld-bus-tap.is-guide {
  opacity: .22;
  stroke-width: 1.2;
  stroke-dasharray: 3 3;
}
.zrsld-bus-taps .zrsld-bus-junction {
  fill: currentColor;
  stroke: #fff;
  stroke-width: .8;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.zrsld-bus-taps .zrsld-bus-junction.is-guide {
  opacity: .3;
  fill: #fff;
  stroke: currentColor;
  stroke-width: 1;
}


/* v1.4.2 — CAD-style contextual interaction and quick actions. */
.zrsld-context-menu {
  position: absolute;
  z-index: 90;
  width: 264px;
  max-height: min(560px, calc(100% - 16px));
  overflow: visible;
  padding: 6px;
  border: 1px solid #c4ccd2;
  border-radius: 8px;
  color: #20282e;
  background: rgba(255,255,255,.985);
  box-shadow: 0 12px 34px rgba(18,27,33,.22), 0 2px 6px rgba(18,27,33,.12);
  font-size: 12px;
  pointer-events: auto;
}
.zrsld-context-menu__title { display:grid; gap:2px; padding:7px 9px 8px; border-bottom:1px solid #e2e7ea; margin-bottom:4px; }
.zrsld-context-menu__title strong { font-size:12px; }
.zrsld-context-menu__title small { color:#68747c; font-size:10px; }
.zrsld-context-menu__item {
  width:100%; min-height:32px; display:grid; grid-template-columns:22px minmax(0,1fr) auto 14px;
  align-items:center; gap:7px; padding:5px 8px; border:0; border-radius:5px;
  color:#263139; background:transparent; text-align:left; cursor:pointer;
}
.zrsld-context-menu__item:hover,.zrsld-context-menu__item:focus,.zrsld-context-menu__item:focus-visible { color:#142028; background:#eef3f6; outline:none; }
.zrsld-context-menu__item.is-danger { color:#a42f28; }
.zrsld-context-menu__item.is-danger:hover { background:#fff0ee; }
.zrsld-context-menu__item:disabled { opacity:.38; cursor:default; }
.zrsld-context-menu__item kbd { min-width:42px; color:#7a858c; background:transparent; border:0; box-shadow:none; font-size:9px; text-align:right; }
.zrsld-context-menu__icon { width:18px; height:18px; display:grid; place-items:center; color:#59666e; }
.zrsld-context-menu__icon .zrsld-icon { width:16px; height:16px; }
.zrsld-context-menu__label { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.zrsld-context-menu__separator { height:1px; margin:5px 4px; background:#dde3e7; }
.zrsld-context-menu__hint { padding:7px 9px 3px; color:#879198; font-size:9px; }
.zrsld-context-menu__submenu-host { position:relative; }
.zrsld-context-menu__submenu-host:focus-within > .zrsld-context-menu__item { color:#142028; background:#eef3f6; }
.zrsld-context-menu__submenu { display:none; left:calc(100% - 2px); top:-6px; max-height:430px; overflow-y:auto; }
.zrsld-context-menu__submenu-host:hover > .zrsld-context-menu__submenu,.zrsld-context-menu__submenu-host:focus-within > .zrsld-context-menu__submenu { display:block; }
.zrsld-context-menu.is-align-left .zrsld-context-menu__submenu,.zrsld-context-menu__submenu.is-align-left { left:auto; right:calc(100% - 2px); }

.zrsld-selection-toolbar {
  position:absolute; z-index:65; display:flex; align-items:center; gap:3px; padding:4px;
  border:1px solid rgba(255,255,255,.16); border-radius:7px; color:#fff;
  background:rgba(31,42,50,.96); box-shadow:0 7px 20px rgba(17,25,31,.22);
  transform:translate(-50%,-100%); pointer-events:auto;
}
.zrsld-selection-toolbar.is-below { transform:translate(-50%,0); }
.zrsld-selection-toolbar .zrsld-button { min-width:28px; height:28px; padding:5px; border-color:transparent; color:#f5f8fa; background:transparent; }
.zrsld-selection-toolbar .zrsld-button:hover { background:rgba(255,255,255,.12); }
.zrsld-selection-toolbar__count { min-width:22px; height:22px; display:grid; place-items:center; border-radius:4px; color:#263139; background:#fff; font-size:10px; font-weight:800; }
.zrsld-shell.is-temporary-pan .zrsld-canvas-panel { cursor:grabbing; }
@media (max-width:760px) { .zrsld-context-menu { width:min(248px,calc(100% - 16px)); } .zrsld-selection-toolbar { display:none; } }


/* v1.4.2 — unobstructed canvas: persistent navigation lives in the top toolbar. */
.zrsld-view-group {
  min-height: 34px;
}
.zrsld-top-zoom-readout {
  min-width: 38px;
  padding: 0 5px;
  color: #cbd3d8;
  font-size: 9.5px;
  font-weight: 800;
  text-align: center;
  white-space: nowrap;
}
@media (max-width: 1080px) {
  .zrsld-top-zoom-readout { display: none; }
}


/* v1.4.2 explicit connection-admission feedback. */
.zrsld-terminal-handle.is-valid-target {
  opacity: 1 !important;
  pointer-events: all;
  background: #fff !important;
  box-shadow: 0 0 0 2px var(--zrsld-success), 0 0 0 6px rgba(31,106,76,.16) !important;
  transform: translate(-50%, -50%) scale(1.2) !important;
}
.zrsld-equipment-node.has-valid-terminal::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 1px solid rgba(31,106,76,.58);
  border-radius: 7px;
  pointer-events: none;
}
.zrsld-terminal-handle.is-invalid-target {
  opacity: 1 !important;
  pointer-events: all;
  background: #fff !important;
  box-shadow: 0 0 0 2px var(--zrsld-danger), 0 0 0 6px rgba(177,61,50,.18) !important;
  transform: translate(-50%, -50%) scale(1.28) !important;
  animation: zrsld-invalid-terminal-pulse .9s ease-in-out infinite alternate;
}
.zrsld-equipment-node.has-invalid-terminal::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px dashed rgba(177,61,50,.72);
  border-radius: 7px;
  pointer-events: none;
}
.zrsld-status-message {
  min-width: 0;
  max-width: min(62vw, 720px);
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 650;
}
.zrsld-status-message.is-error { color: var(--zrsld-danger); font-weight: 800; }
.zrsld-status-message.is-success { color: var(--zrsld-success); font-weight: 800; }
.zrsld-status-message.is-info { color: var(--zrsld-info); }
@keyframes zrsld-invalid-terminal-pulse {
  from { box-shadow: 0 0 0 2px var(--zrsld-danger), 0 0 0 4px rgba(177,61,50,.12); }
  to { box-shadow: 0 0 0 2px var(--zrsld-danger), 0 0 0 8px rgba(177,61,50,.22); }
}
@media (prefers-reduced-motion: reduce) {
  .zrsld-terminal-handle.is-invalid-target { animation: none; }
}


/* v1.4.6 — editable orthogonal routes, semantic crossings and pinned labels. */
.zrsld-node-label,
.zrsld-node-label.is-bus,
.zrsld-equipment-node.is-low-detail .zrsld-node-label {
  border: 0;
  background: transparent;
  box-shadow: none;
  pointer-events: none;
}

.zrsld-node-label strong,
.zrsld-node-label span {
  paint-order: stroke fill;
  -webkit-text-stroke: 2.5px rgba(255, 255, 255, 0.96);
  text-shadow: 0 0 2px #fff, 0 0 4px #fff;
}

.zrsld-node-label span {
  -webkit-text-stroke-width: 2px;
}

.zrsld-symbol-halo {
  fill: rgba(255, 255, 255, 0.72);
}

.zrsld-canvas-panel .react-flow__attribution {
  opacity: 0.62;
  background: rgba(255, 255, 255, 0.82);
  border-radius: 3px 0 0 0;
}

/* v1.4.6 — authoritative conductor geometry, draggable labels and dynamic bus taps. */
.zrsld-node-label,
.zrsld-node-label.is-bus,
.zrsld-equipment-node.is-low-detail .zrsld-node-label {
  pointer-events: auto;
  cursor: move;
  user-select: none;
  touch-action: none;
  box-sizing: border-box;
}
.zrsld-node-label:hover,
.zrsld-node-label.is-pinned {
  background: rgba(255,255,255,.86);
  box-shadow: 0 0 0 1px rgba(79,92,101,.22);
  border-radius: 3px;
}
.zrsld-node-label.is-pinned::after,
.zrsld-edge-label.is-pinned::after {
  content: "PIN";
  margin-left: 5px;
  color: #7a858c;
  font-size: 6.5px;
  font-weight: 850;
  letter-spacing: .5px;
  vertical-align: middle;
}
.zrsld-edge-label {
  box-sizing: border-box;
  cursor: move;
  user-select: none;
  touch-action: none;
  text-align: center;
}
.zrsld-edge-label:hover,
.zrsld-edge-label.is-pinned {
  border-color: #98a4ac;
  box-shadow: 0 0 0 2px rgba(82,106,122,.1);
}
.zrsld-route-handle {
  position: absolute;
  z-index: 12;
  width: 12px;
  height: 12px;
  padding: 0;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--zrsld-accent);
  box-shadow: 0 0 0 1px #8d3a1e, 0 2px 5px rgba(17,25,31,.22);
  cursor: move;
  pointer-events: all;
  touch-action: none;
}
.zrsld-route-handle.is-segment {
  width: 18px;
  height: 8px;
  border-radius: 4px;
  background: #526a7a;
  box-shadow: 0 0 0 1px #334852, 0 2px 5px rgba(17,25,31,.2);
}
.zrsld-route-handle.is-segment.is-vertical {
  width: 8px;
  height: 18px;
  cursor: ew-resize;
}
.zrsld-route-handle.is-segment.is-horizontal { cursor: ns-resize; }
.zrsld-route-handle:hover,
.zrsld-route-handle:focus-visible {
  outline: none;
  transform-origin: center;
  filter: brightness(1.08);
}
.zrsld-crossing-gap,
.zrsld-crossing-bridge {
  fill: none;
  stroke-linecap: square;
  stroke-linejoin: round;
  pointer-events: none;
}
.zrsld-crossing-gap { stroke: #fff; stroke-width: 8; }
.zrsld-crossing-bridge { stroke: #20282e; stroke-width: 2.25; }
.zrsld-crossing-bridge.is-cable { stroke-width: 3.5; }
.zrsld-crossing-bridge.is-measurement { stroke: var(--zrsld-info); stroke-width: 1.5; }
.zrsld-crossing-bridge.is-control { stroke: var(--zrsld-danger); stroke-width: 1.5; }
.zrsld-authoritative-junction {
  fill: #20282e;
  stroke: #fff;
  stroke-width: 1.2;
  pointer-events: none;
}
.zrsld-terminal-handle.is-provisional {
  opacity: .5;
  background: #fff;
  border-style: dashed;
  box-shadow: 0 0 0 1px #526a7a;
}
.zrsld-terminal-handle.is-provisional:hover {
  opacity: 1;
  background: #f28a5b;
}
.zrsld-bus-taps .zrsld-bus-tap.is-active { stroke-width: 2.8; }
.zrsld-bus-taps .zrsld-bus-junction.is-active { stroke-width: 1.2; }
.zrsld-sheet-fields { display: grid; grid-template-columns: minmax(0,1fr) auto minmax(0,1fr); align-items: center; gap: 6px; }
.zrsld-sheet-fields span { color: var(--zrsld-muted); font-size: 9px; font-weight: 700; }
.react-flow__edgeupdater { cursor: crosshair; }
.react-flow__edge.selected .react-flow__edgeupdater,
.react-flow__edge:focus .react-flow__edgeupdater { fill: var(--zrsld-accent); stroke: #fff; stroke-width: 2; }

/* v1.4.6 — terminal-centre conductor continuity.
 * React Flow terminates an edge at the outer face of a handle. The earlier
 * 12 px handle therefore left a visible 6 px gap whenever the handle was
 * hidden. Keep the measured handle at 2 px on the authoritative terminal
 * centre and draw the professional 12 px target with a pseudo-element. */
.zrsld-terminal-handle.react-flow__handle {
  width: 2px !important;
  height: 2px !important;
  min-width: 2px !important;
  min-height: 2px !important;
  border: 0 !important;
  border-radius: 50%;
  background: transparent !important;
  box-shadow: none !important;
  opacity: 0;
  overflow: visible;
  pointer-events: none;
  transform: translate(-50%, -50%) !important;
  transition: opacity .12s ease;
}
.zrsld-terminal-handle.react-flow__handle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--zrsld-accent);
  box-shadow: 0 0 0 1px var(--zrsld-accent), 0 2px 5px rgba(20,28,33,.22);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity .12s ease, transform .12s ease;
}
.zrsld-terminal-handle.react-flow__handle.is-visible,
.zrsld-terminal-handle.react-flow__handle.is-valid-target,
.zrsld-terminal-handle.react-flow__handle.is-invalid-target {
  opacity: 1 !important;
  pointer-events: all;
  transform: translate(-50%, -50%) !important;
  animation: none !important;
}
.zrsld-terminal-handle.react-flow__handle.is-visible::after,
.zrsld-terminal-handle.react-flow__handle.is-valid-target::after,
.zrsld-terminal-handle.react-flow__handle.is-invalid-target::after {
  opacity: 1;
  pointer-events: auto;
}
.zrsld-terminal-handle.react-flow__handle.is-visible:hover::after { transform: translate(-50%, -50%) scale(1.35); }
.zrsld-terminal-handle.react-flow__handle.is-measurement::after { background: var(--zrsld-info); box-shadow: 0 0 0 1px var(--zrsld-info), 0 2px 5px rgba(20,28,33,.22); }
.zrsld-terminal-handle.react-flow__handle.is-control::after { background: var(--zrsld-danger); box-shadow: 0 0 0 1px var(--zrsld-danger), 0 2px 5px rgba(20,28,33,.22); }
.zrsld-terminal-handle.react-flow__handle.is-earth::after { background: var(--zrsld-success); box-shadow: 0 0 0 1px var(--zrsld-success), 0 2px 5px rgba(20,28,33,.22); }
.zrsld-terminal-handle.react-flow__handle.is-valid-target::after {
  background: #fff !important;
  box-shadow: 0 0 0 2px var(--zrsld-success), 0 0 0 6px rgba(31,106,76,.16) !important;
  transform: translate(-50%, -50%) scale(1.2);
}
.zrsld-terminal-handle.react-flow__handle.is-invalid-target::after {
  background: #fff !important;
  box-shadow: 0 0 0 2px var(--zrsld-danger), 0 0 0 6px rgba(177,61,50,.18) !important;
  transform: translate(-50%, -50%) scale(1.28);
}
.zrsld-terminal-handle.react-flow__handle.is-provisional::after {
  opacity: .5;
  background: #fff;
  border-style: dashed;
  box-shadow: 0 0 0 1px #526a7a;
}
.zrsld-terminal-handle.react-flow__handle.is-provisional:hover::after {
  opacity: 1;
  background: #f28a5b;
}

/* v1.5.1 — cross-browser visual fallback when backdrop filtering is unavailable. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .zrsld-statusbar { background: #fff; }
  .zrsld-modal-backdrop { background: rgba(18,24,28,.72); }
  .zrsld-busy-cover { background: rgba(20,27,31,.62); }
  .zrsld-overview { background: #20272d; }
}

/* v1.4.7 — viewport-loss prevention and in-toolbar recovery. */
.zrsld-topbar .zrsld-button.is-recovery {
  width: auto;
  min-width: 112px;
  padding: 0 10px;
  color: #fff;
  background: var(--zrsld-accent);
  border-color: #ff9a71;
  box-shadow: 0 0 0 2px rgba(233,93,42,.18);
}
.zrsld-topbar .zrsld-button.is-recovery:hover:not(:disabled) {
  background: var(--zrsld-accent-dark);
  border-color: #ffb093;
}
.zrsld-status-message.is-warning { color: #8a3a17; font-weight: 750; }
.zrsld-viewport-recovery {
  appearance: none;
  min-height: 22px;
  padding: 2px 8px;
  border: 1px solid var(--zrsld-accent);
  border-radius: 4px;
  color: #fff;
  background: var(--zrsld-accent);
  font-size: 9.5px;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
}
.zrsld-viewport-recovery:hover,
.zrsld-viewport-recovery:focus-visible { background: var(--zrsld-accent-dark); outline: 2px solid rgba(233,93,42,.28); outline-offset: 1px; }

/* v1.5.1 - reusable feeder assemblies and deterministic direct PDF setup. */
.zrsld-assembly-category > button {
  color: #743113;
  background: #fff3ed;
  border-top: 1px solid #f4c8b5;
  border-bottom-color: #f4c8b5;
}
.zrsld-palette-category > .zrsld-assembly-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 7px;
  background: linear-gradient(180deg, #fffaf7, #fff);
}
.zrsld-assembly-item {
  min-width: 0;
  min-height: 76px;
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border: 1px solid #e9d3c8;
  border-radius: 8px;
  color: var(--zrsld-charcoal);
  background: #fff;
  text-align: left;
  cursor: grab;
}
.zrsld-assembly-item:hover:not(:disabled) {
  border-color: var(--zrsld-accent);
  background: var(--zrsld-accent-soft);
  box-shadow: 0 3px 10px rgba(83,44,25,.08);
}
.zrsld-assembly-item:active:not(:disabled) { cursor: grabbing; }
.zrsld-assembly-item:disabled { opacity: .46; cursor: not-allowed; }
.zrsld-assembly-item > span {
  min-width: 0;
  display: grid;
  gap: 3px;
}
.zrsld-assembly-item strong { font-size: 10px; line-height: 1.2; }
.zrsld-assembly-item small { color: var(--zrsld-muted); font-size: 8.5px; line-height: 1.25; }
.zrsld-assembly-preview {
  width: 72px;
  height: 58px;
  overflow: visible;
  color: var(--zrsld-charcoal);
}
.zrsld-assembly-preview path,
.zrsld-assembly-preview rect,
.zrsld-assembly-preview circle {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: square;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.zrsld-assembly-preview circle { fill: currentColor; stroke: none; }
.zrsld-assembly-preview text { fill: currentColor; font: 700 12px Arial, sans-serif; }

.zrsld-page-setup { display: grid; gap: 14px; }
.zrsld-page-setup fieldset { margin: 0; }
.zrsld-page-plan {
  display: grid;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid #bfd3de;
  border-radius: 8px;
  background: #f2f8fb;
}
.zrsld-page-plan > strong { color: #244c61; font-size: 12px; }
.zrsld-page-plan dl {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}
.zrsld-page-plan dl > div {
  min-width: 0;
  display: grid;
  gap: 2px;
  padding: 8px;
  border-radius: 6px;
  background: #fff;
}
.zrsld-page-plan dt { color: var(--zrsld-muted); font-size: 8.5px; font-weight: 800; letter-spacing: .35px; text-transform: uppercase; }
.zrsld-page-plan dd { margin: 0; color: var(--zrsld-charcoal); font-size: 10px; font-weight: 700; }
@media (max-width: 760px) {
  .zrsld-page-plan dl { grid-template-columns: 1fr; }
  .zrsld-assembly-item { grid-template-columns: 64px minmax(0, 1fr); }
  .zrsld-assembly-preview { width: 60px; }
}

/* v1.5.1 — theme-independent pointer drag for reusable assemblies. */
.zrsld-assembly-item {
  -webkit-user-drag: none;
  -webkit-user-select: none;
  user-select: none;
  touch-action: none;
}
.zrsld-assembly-item:hover:not(.is-disabled):not(:disabled) {
  border-color: var(--zrsld-accent);
  background: var(--zrsld-accent-soft);
  box-shadow: 0 3px 10px rgba(83,44,25,.08);
}
.zrsld-assembly-item.is-disabled,
.zrsld-assembly-item[aria-disabled="true"] {
  opacity: .58;
  cursor: not-allowed;
}
.zrsld-assembly-item.is-disabled small,
.zrsld-assembly-item[aria-disabled="true"] small { color: #9b3d31; }
.zrsld-assembly-drag-ghost {
  position: fixed;
  z-index: 2147483000;
  width: 222px;
  min-height: 72px;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border: 2px solid #a8b2b8;
  border-radius: 9px;
  color: var(--zrsld-charcoal);
  background: rgba(255,255,255,.96);
  box-shadow: 0 12px 32px rgba(25,35,40,.22);
  pointer-events: none;
  transform: translate3d(0,0,0);
}
.zrsld-assembly-drag-ghost.is-over-canvas {
  border-color: var(--zrsld-accent);
  background: #fff8f4;
  box-shadow: 0 12px 34px rgba(233,93,42,.24);
}
.zrsld-assembly-drag-ghost .zrsld-assembly-preview { width: 68px; height: 54px; }
.zrsld-assembly-drag-ghost > span { min-width: 0; display: grid; gap: 4px; }
.zrsld-assembly-drag-ghost strong { font-size: 11px; line-height: 1.2; }
.zrsld-assembly-drag-ghost small { color: var(--zrsld-muted); font-size: 9px; line-height: 1.2; }
.zrsld-canvas-panel.is-assembly-drop-target::after {
  content: 'Release to place reusable assembly';
  position: absolute;
  z-index: 1050;
  inset: 7px;
  display: grid;
  place-items: start center;
  padding-top: 13px;
  border: 2px dashed var(--zrsld-accent);
  border-radius: 10px;
  color: #7a351b;
  background: rgba(255,244,237,.12);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .01em;
  pointer-events: none;
}
body.zrsld-assembly-dragging,
body.zrsld-assembly-dragging * { cursor: grabbing !important; }
.zrsld-assembly-item.is-disabled:hover,
.zrsld-assembly-item[aria-disabled="true"]:hover {
  border-color: #e9d3c8;
  background: #fff;
  box-shadow: none;
}
.zrsld-assembly-item.is-disabled:active,
.zrsld-assembly-item[aria-disabled="true"]:active { cursor: not-allowed; }

/* v1.5.4 — numerical studies, operating cases, readiness and result views. */
.zrsld-modal.is-xlarge { width: min(1180px, 100%); }
.zrsld-study-tabs {
  position: sticky;
  z-index: 3;
  top: -16px;
  display: flex;
  gap: 3px;
  padding: 8px 0 10px;
  background: #fff;
  border-bottom: 1px solid var(--zrsld-line);
}
.zrsld-study-tabs button {
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--zrsld-line-strong);
  border-radius: 6px;
  color: var(--zrsld-muted);
  background: #f7f9fa;
  font-size: 10px;
  font-weight: 750;
  cursor: pointer;
}
.zrsld-study-tabs button:hover { color: var(--zrsld-charcoal); border-color: #929da5; }
.zrsld-study-tabs button.is-active { color: #fff; border-color: var(--zrsld-accent); background: var(--zrsld-accent); }
.zrsld-study-field-groups { display: grid; gap: 12px; }
.zrsld-inline-checkbox { min-height: 32px; display: flex; align-items: center; gap: 7px; padding: 6px 8px; border: 1px solid var(--zrsld-line-strong); border-radius: 6px; background: #fff; font-size: 10px; }
.zrsld-inline-checkbox input { width: 15px; height: 15px; accent-color: var(--zrsld-accent); }
.zrsld-required-mark { margin-left: 3px; color: var(--zrsld-danger); font-size: 11px; }
.zrsld-advanced-toggle { justify-self: start; border: 0; padding: 2px 0; color: var(--zrsld-info); background: transparent; font-size: 10px; font-weight: 750; cursor: pointer; }
.zrsld-advanced-toggle:hover { text-decoration: underline; }
.zrsld-topbar .zrsld-button.is-study-ready { color: #d9ffed; border-color: #438a6d; }
.zrsld-topbar .zrsld-button.is-study-blocked { color: #ffe2d8; border-color: #b75a3b; }
.zrsld-study-status { border: 0; border-radius: 4px; padding: 2px 6px; font-size: inherit; font-weight: 800; cursor: pointer; }
.zrsld-study-status.is-ready { color: #14573d; background: #dff3e8; }
.zrsld-study-status.is-blocked { color: #8b2f1e; background: #fae6df; }

.zrsld-study-cases { min-height: 520px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 14px; }
.zrsld-study-case-list { min-width: 0; display: flex; flex-direction: column; gap: 7px; padding-right: 12px; border-right: 1px solid var(--zrsld-line); }
.zrsld-study-case-list__actions { display: flex; gap: 5px; padding-bottom: 5px; }
.zrsld-study-case-card { display: grid; gap: 3px; width: 100%; padding: 10px 11px; border: 1px solid var(--zrsld-line); border-radius: 7px; color: var(--zrsld-charcoal); background: #fff; text-align: left; cursor: pointer; }
.zrsld-study-case-card:hover { border-color: #9ca6ad; background: #f9fafb; }
.zrsld-study-case-card.is-active { border-color: var(--zrsld-accent); box-shadow: inset 3px 0 0 var(--zrsld-accent); background: #fff8f4; }
.zrsld-study-case-card strong { overflow: hidden; text-overflow: ellipsis; font-size: 10.5px; }
.zrsld-study-case-card small { color: var(--zrsld-muted); font-size: 8.5px; }
.zrsld-study-case-editor { min-width: 0; display: grid; align-content: start; gap: 13px; }
.zrsld-study-case-editor fieldset { min-width: 0; margin: 0; padding: 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; }
.zrsld-study-case-editor legend { padding: 0 5px; font-size: 11px; font-weight: 800; }
.zrsld-study-case-editor legend span { color: var(--zrsld-muted); font-weight: 500; }
.zrsld-case-override-table { max-height: 320px; overflow: auto; border: 1px solid var(--zrsld-line); border-radius: 6px; }
.zrsld-case-override-row { display: grid; grid-template-columns: minmax(190px,1.5fr) minmax(105px,.75fr) minmax(105px,.75fr) minmax(80px,.55fr); gap: 7px; align-items: center; min-height: 42px; padding: 6px 8px; border-bottom: 1px solid #edf0f2; }
.zrsld-case-override-row:last-child { border-bottom: 0; }
.zrsld-case-override-row.is-header { position: sticky; z-index: 2; top: 0; min-height: 30px; color: var(--zrsld-muted); background: #f2f5f6; font-size: 9px; font-weight: 800; text-transform: uppercase; }
.zrsld-case-override-row > span:first-child { min-width: 0; display: grid; gap: 2px; }
.zrsld-case-override-row strong { overflow: hidden; text-overflow: ellipsis; font-size: 9.5px; }
.zrsld-case-override-row small { overflow: hidden; color: var(--zrsld-muted); font-size: 8px; text-overflow: ellipsis; }
.zrsld-case-override-row input,
.zrsld-case-override-row select { min-width: 0; height: 30px; font-size: 9px; }
.zrsld-na { color: #abb2b7; text-align: center; }
.zrsld-case-connection-grid { max-height: 250px; overflow: auto; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 6px; }
.zrsld-case-connection-grid label { display: grid; grid-template-columns: minmax(0,1fr) 105px; align-items: center; gap: 8px; padding: 7px 8px; border: 1px solid var(--zrsld-line); border-radius: 6px; }
.zrsld-case-connection-grid label > span { min-width: 0; display: grid; gap: 2px; }
.zrsld-case-connection-grid strong { overflow: hidden; text-overflow: ellipsis; font-size: 9px; }
.zrsld-case-connection-grid small { color: var(--zrsld-muted); font-size: 8px; }
.zrsld-case-connection-grid select { height: 29px; font-size: 9px; }

.zrsld-analysis { display: grid; gap: 14px; }
.zrsld-analysis__toolbar { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
.zrsld-analysis__toolbar > label { min-width: 260px; display: grid; gap: 4px; }
.zrsld-analysis__toolbar > label span { color: var(--zrsld-muted); font-size: 9px; font-weight: 800; }
.zrsld-worker-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
.zrsld-worker-actions .zrsld-button.is-compact { width: auto; min-width: 48px; padding: 0 9px; }
.zrsld-readiness-cards { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; }
.zrsld-readiness-card { min-width: 0; display: grid; gap: 5px; padding: 11px; border: 1px solid var(--zrsld-line); border-radius: 8px; color: var(--zrsld-charcoal); background: #fff; text-align: left; cursor: pointer; }
.zrsld-readiness-card:hover { border-color: #9ba5ac; }
.zrsld-readiness-card.is-active { outline: 2px solid var(--zrsld-accent); outline-offset: 1px; }
.zrsld-readiness-card > span { color: var(--zrsld-muted); font-size: 9px; font-weight: 800; text-transform: uppercase; letter-spacing: .02em; }
.zrsld-readiness-card strong { font-size: 14px; }
.zrsld-readiness-card small { min-height: 24px; color: var(--zrsld-muted); font-size: 8.5px; line-height: 1.35; }
.zrsld-readiness-card i { display: block; height: 5px; overflow: hidden; border-radius: 5px; background: #e7ebed; }
.zrsld-readiness-card i b { display: block; height: 100%; background: var(--zrsld-danger); }
.zrsld-readiness-card.is-ready i b { background: var(--zrsld-success); }
.zrsld-analysis__issues { min-height: 190px; border: 1px solid var(--zrsld-line); border-radius: 8px; overflow: hidden; }
.zrsld-analysis__issues > header { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 11px 13px; border-bottom: 1px solid var(--zrsld-line); background: #f7f9fa; }
.zrsld-analysis__issues h3 { font-size: 12px; }
.zrsld-analysis__issues p { margin-top: 3px; color: var(--zrsld-muted); font-size: 9px; }
.zrsld-analysis__issues header > span { padding: 4px 7px; border-radius: 4px; font-size: 8.5px; font-weight: 900; }
.zrsld-analysis__issues header > span.is-ready { color: #14573d; background: #dff3e8; }
.zrsld-analysis__issues header > span.is-blocked { color: #8b2f1e; background: #fae6df; }
.zrsld-issue-list { max-height: 330px; overflow: auto; display: grid; }
.zrsld-study-issue { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 10px 12px; border-bottom: 1px solid #edf0f2; }
.zrsld-study-issue:last-child { border-bottom: 0; }
.zrsld-study-issue.is-error { box-shadow: inset 3px 0 0 var(--zrsld-danger); }
.zrsld-study-issue.is-warning { box-shadow: inset 3px 0 0 #c18718; }
.zrsld-study-issue > div { min-width: 0; display: grid; gap: 3px; }
.zrsld-study-issue strong { font-size: 9.5px; line-height: 1.35; }
.zrsld-study-issue small { color: var(--zrsld-muted); font-size: 8.5px; line-height: 1.35; }
.zrsld-study-issue button { flex: 0 0 auto; border: 1px solid var(--zrsld-line-strong); border-radius: 5px; padding: 5px 8px; color: var(--zrsld-info); background: #fff; font-size: 8.5px; font-weight: 800; cursor: pointer; }
.zrsld-worker-result { display: grid; gap: 6px; padding: 11px 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; background: #fafbfb; }
.zrsld-worker-result h3 { font-size: 11px; }
.zrsld-worker-result p { color: var(--zrsld-muted); font-size: 9px; }
.zrsld-worker-result pre { max-height: 250px; overflow: auto; margin: 0; padding: 9px; border-radius: 5px; color: #e8eef1; background: #263138; font: 9px/1.45 ui-monospace,SFMono-Regular,Consolas,monospace; white-space: pre-wrap; }
.zrsld-worker-result pre.is-error { color: #7c201c; background: #fbeceb; }

@media (max-width: 900px) {
  .zrsld-readiness-cards { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .zrsld-study-cases { grid-template-columns: 1fr; }
  .zrsld-study-case-list { max-height: 190px; overflow: auto; padding-right: 0; padding-bottom: 10px; border-right: 0; border-bottom: 1px solid var(--zrsld-line); }
  .zrsld-case-connection-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .zrsld-study-tabs { overflow-x: auto; }
  .zrsld-study-tabs button { flex: 0 0 auto; }
  .zrsld-readiness-cards { grid-template-columns: 1fr; }
  .zrsld-analysis__toolbar { align-items: stretch; flex-direction: column; }
  .zrsld-analysis__toolbar > label { min-width: 0; }
  .zrsld-worker-actions { justify-content: flex-start; }
  .zrsld-case-override-row { grid-template-columns: minmax(150px,1.4fr) repeat(3,minmax(90px,.7fr)); min-width: 540px; }
}

/* v1.5.4 — numerical load-flow and phase short-circuit studies. */
.zrsld-study-runner { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.zrsld-study-run-card { display: grid; align-content: start; gap: 9px; padding: 12px; border: 1px solid var(--zrsld-line); border-radius: 8px; background: #fff; }
.zrsld-study-run-card.is-blocked { background: #fbfbfb; }
.zrsld-study-run-card > header { display: flex; justify-content: space-between; gap: 10px; align-items: start; }
.zrsld-study-run-card > header span { display: block; margin-bottom: 3px; color: var(--zrsld-accent); font-size: 8px; font-weight: 900; letter-spacing: .06em; }
.zrsld-study-run-card > header h3 { font-size: 12px; line-height: 1.25; }
.zrsld-study-run-card > header > strong { padding: 4px 6px; border-radius: 4px; color: #14573d; background: #dff3e8; font-size: 8px; white-space: nowrap; }
.zrsld-study-run-card.is-blocked > header > strong { color: #8b2f1e; background: #fae6df; }
.zrsld-study-run-card > p { min-height: 34px; color: var(--zrsld-muted); font-size: 9px; line-height: 1.45; }
.zrsld-study-run-card > .zrsld-button { justify-self: start; }
.zrsld-study-run-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 7px; }
.zrsld-study-run-grid label { display: grid; gap: 3px; }
.zrsld-study-run-grid label > span { color: var(--zrsld-muted); font-size: 8px; font-weight: 800; }
.zrsld-study-run-grid input,.zrsld-study-run-grid select { min-width: 0; }
.zrsld-check-row,.zrsld-inline-checks label { display: flex; align-items: center; gap: 6px; color: var(--zrsld-charcoal); font-size: 9px; }
.zrsld-check-row input,.zrsld-inline-checks input { width: auto; margin: 0; }
.zrsld-inline-checks { display: flex; flex-wrap: wrap; gap: 10px; }

.zrsld-analysis-results { display: grid; gap: 10px; padding: 12px; border: 1px solid #bcc7cd; border-radius: 8px; background: #fff; }
.zrsld-analysis-results.is-stale { border-color: #d6973d; }
.zrsld-analysis-results__header { display: flex; justify-content: space-between; align-items: start; gap: 12px; }
.zrsld-analysis-results__header > div:first-child > span { color: var(--zrsld-accent); font-size: 8px; font-weight: 900; letter-spacing: .06em; }
.zrsld-analysis-results__header h3 { margin-top: 2px; font-size: 14px; }
.zrsld-analysis-results__header p { margin-top: 3px; color: var(--zrsld-muted); font-size: 8.5px; }
.zrsld-analysis-stale { display: flex; gap: 8px; padding: 8px 10px; border: 1px solid #e3b464; border-radius: 5px; color: #6f4814; background: #fff6e4; font-size: 9px; }
.zrsld-analysis-stale strong { white-space: nowrap; }
.zrsld-analysis-metrics { display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 7px; }
.zrsld-analysis-metric { display: grid; align-content: start; gap: 3px; min-height: 63px; padding: 8px; border: 1px solid var(--zrsld-line); border-radius: 6px; background: #f8fafb; }
.zrsld-analysis-metric > span { color: var(--zrsld-muted); font-size: 7.5px; font-weight: 900; text-transform: uppercase; letter-spacing: .03em; }
.zrsld-analysis-metric > strong { font-size: 12px; line-height: 1.2; }
.zrsld-analysis-metric > small { color: var(--zrsld-muted); font-size: 7.5px; line-height: 1.3; }
.zrsld-analysis-metric.is-success { border-color: #aad5bf; background: #f2fbf6; }
.zrsld-analysis-metric.is-warning { border-color: #e4bd72; background: #fff9ed; }
.zrsld-analysis-metric.is-danger { border-color: #e1a49f; background: #fff3f2; }
.zrsld-analysis-table-block { min-width: 0; overflow: hidden; border: 1px solid var(--zrsld-line); border-radius: 7px; }
.zrsld-analysis-table-block > header { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--zrsld-line); background: #f5f7f8; }
.zrsld-analysis-table-block > header h4 { font-size: 10px; }
.zrsld-analysis-table-block > header span { color: var(--zrsld-muted); font-size: 8px; }
.zrsld-analysis-table-wrap { max-height: 260px; overflow: auto; }
.zrsld-analysis-table-wrap table { width: 100%; border-collapse: collapse; font-size: 8.5px; }
.zrsld-analysis-table-wrap th { position: sticky; top: 0; z-index: 1; padding: 7px 8px; border-bottom: 1px solid var(--zrsld-line); color: #45545c; background: #eef2f4; text-align: right; font-size: 7.5px; text-transform: uppercase; letter-spacing: .025em; white-space: nowrap; }
.zrsld-analysis-table-wrap th:first-child,.zrsld-analysis-table-wrap td:first-child { text-align: left; }
.zrsld-analysis-table-wrap td { padding: 6px 8px; border-bottom: 1px solid #edf0f2; text-align: right; white-space: nowrap; }
.zrsld-analysis-table-wrap td strong,.zrsld-analysis-table-wrap td small { display: block; }
.zrsld-analysis-table-wrap td small { max-width: 190px; overflow: hidden; color: var(--zrsld-muted); font-size: 7px; text-overflow: ellipsis; }
.zrsld-analysis-table-wrap tr:last-child td { border-bottom: 0; }
.zrsld-analysis-table-wrap tr.is-warning td { background: #fff9ed; }
.zrsld-analysis-table-wrap tr.is-danger td { background: #fff0ee; }
.zrsld-result-status { display: inline-block; padding: 2px 5px; border-radius: 3px; color: #2f3c43; background: #e8edef; font-size: 7px; font-weight: 900; text-transform: uppercase; }
.zrsld-result-status.is-normal { color: #14573d; background: #dff3e8; }
.zrsld-result-status.is-undervoltage,.zrsld-result-status.is-overvoltage { color: #7a4d0e; background: #ffedc4; }
.zrsld-result-status.is-deenergized,.zrsld-result-status.is-danger { color: #8b2f1e; background: #fae6df; }
.zrsld-analysis-disclaimer { margin: 8px 10px; color: var(--zrsld-muted); font-size: 7.5px; line-height: 1.4; }
.zrsld-analysis-messages { padding: 8px 10px; border: 1px solid var(--zrsld-line); border-radius: 6px; background: #fbfcfc; }
.zrsld-analysis-messages summary { cursor: pointer; font-size: 9px; font-weight: 800; }
.zrsld-analysis-messages p { display: grid; grid-template-columns: minmax(120px,auto) 1fr; gap: 8px; margin-top: 7px; color: var(--zrsld-muted); font-size: 8px; }


@media (max-width: 1120px) {
  .zrsld-study-runner { grid-template-columns: 1fr; }
  .zrsld-analysis-metrics { grid-template-columns: repeat(3,minmax(0,1fr)); }
}
@media (max-width: 760px) {
  .zrsld-study-run-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .zrsld-analysis-metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .zrsld-analysis-results__header { flex-direction: column; }
}

/* v1.7.0 — theme-isolated, stale-safe, high-contrast numerical-result chip layer. */
.zrsld-analysis-annotation-layer {
  --zrsld-leader-color: #145c40;
  position: absolute;
  inset: 0;
  z-index: 18;
  pointer-events: none;
  opacity: 1;
}
.zrsld-analysis-annotation-layer.is-short-circuit { --zrsld-leader-color: #8a341d; }
/* Interaction suspension must not wash out engineering values. */
.zrsld-analysis-annotation-layer.is-suspended { opacity: 1; }
.zrsld-analysis-leader {
  position: absolute;
  z-index: 1;
  height: 1.5px;
  background: var(--zrsld-leader-color);
  transform-origin: 0 50%;
  pointer-events: none;
}
.zrsld-analysis-leader::before {
  content: "";
  position: absolute;
  left: -3px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  border: 1.5px solid var(--zrsld-leader-color);
  border-radius: 50%;
  background: #fff;
}
.zrsld-analysis-leader > span {
  position: absolute;
  right: -2.5px;
  top: -2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--zrsld-leader-color);
}
.zrsld-analysis-leader.is-warning { --zrsld-leader-color: #6b4100; }
.zrsld-analysis-leader.is-danger { --zrsld-leader-color: #8c211c; }

.zrsld-analysis-annotation {
  --zrsld-result-accent: #145c40;
  --zrsld-chip-background: #f1faf5;
  --zrsld-chip-border: #145c40;
  --zrsld-chip-foreground: #10241a;
  --zrsld-chip-tag: #27483a;
  --zrsld-chip-muted: #3b5549;
  --zrsld-chip-metric-label: #405a4e;
  --zrsld-chip-metric-value: #172c23;
  position: absolute;
  z-index: 2;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: stretch;
  overflow: hidden;
  border: 2px solid var(--zrsld-chip-border);
  border-radius: 7px;
  color: var(--zrsld-chip-foreground);
  background-color: var(--zrsld-chip-background);
  background-image: none;
  color-scheme: light;
  isolation: isolate;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  box-shadow: 0 3px 10px rgba(14,30,23,.25), 0 0 0 1px rgba(255,255,255,.95);
  pointer-events: auto;
  appearance: none;
  margin: 0;
  padding: 0;
  text-align: left;
  font: inherit;
  line-height: 1.22;
  cursor: pointer;
  transform: translateZ(0);
  forced-color-adjust: auto;
}
.zrsld-analysis-annotation-layer.is-suspended .zrsld-analysis-annotation { pointer-events: none; }
.zrsld-analysis-annotation:hover {
  box-shadow: 0 5px 14px rgba(14,30,23,.32), 0 0 0 2px rgba(255,255,255,.98);
}
.zrsld-analysis-annotation:focus-visible {
  outline: 3px solid #111820;
  outline-offset: 2px;
  box-shadow: 0 0 0 5px #fff, 0 5px 14px rgba(14,30,23,.3);
}
.zrsld-analysis-annotation.is-short-circuit {
  --zrsld-result-accent: #8a341d;
  --zrsld-chip-background: #fff2ec;
  --zrsld-chip-border: #8a341d;
  --zrsld-chip-foreground: #2a140d;
  --zrsld-chip-tag: #5f3324;
  --zrsld-chip-muted: #603a2d;
  --zrsld-chip-metric-label: #694034;
  --zrsld-chip-metric-value: #32170f;
}
.zrsld-analysis-annotation.is-warning {
  --zrsld-result-accent: #6b4100;
  --zrsld-chip-background: #fff4d6;
  --zrsld-chip-border: #6b4100;
  --zrsld-chip-foreground: #281a00;
  --zrsld-chip-tag: #5a3a00;
  --zrsld-chip-muted: #5e430d;
  --zrsld-chip-metric-label: #62450e;
  --zrsld-chip-metric-value: #2e1d00;
}
.zrsld-analysis-annotation.is-danger {
  --zrsld-result-accent: #8c211c;
  --zrsld-chip-background: #fff0ef;
  --zrsld-chip-border: #8c211c;
  --zrsld-chip-foreground: #2b0c0a;
  --zrsld-chip-tag: #5a211d;
  --zrsld-chip-muted: #5c312e;
  --zrsld-chip-metric-label: #623631;
  --zrsld-chip-metric-value: #31110f;
  box-shadow: 0 3px 11px rgba(105,23,18,.28), 0 0 0 1px rgba(255,255,255,.95);
}

/*
 * Expanded cards deliberately use a near-white engineering-reading surface and
 * neutral dark typography. Semantic colour remains in the left rail, border,
 * leader and toggle. This prevents coloured mid-tones from competing with dense
 * numerical data and also makes the card resilient to host-theme focus styles.
 */
.zrsld-analysis-annotation.is-detail {
  --zrsld-chip-background: #fbfffd;
  --zrsld-chip-foreground: #111820;
  --zrsld-chip-tag: #26343d;
  --zrsld-chip-muted: #3f4e58;
  --zrsld-chip-metric-label: #465660;
  --zrsld-chip-metric-value: #111820;
}
.zrsld-analysis-annotation.is-detail.is-short-circuit { --zrsld-chip-background: #fffdfb; }
.zrsld-analysis-annotation.is-detail.is-warning { --zrsld-chip-background: #fffdf5; }
.zrsld-analysis-annotation.is-detail.is-danger { --zrsld-chip-background: #fffafa; }

/*
 * WordPress themes commonly impose button/:focus/aria-expanded backgrounds with
 * !important. Result cards are non-form interactive regions, and these scoped,
 * important declarations keep the calculated foreground/background pair
 * authoritative in every mouse, keyboard and expanded state.
 */
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation,
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation:hover,
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation:focus,
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation:active,
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation[aria-expanded="true"] {
  color: var(--zrsld-chip-foreground) !important;
  background-color: var(--zrsld-chip-background) !important;
  background-image: none !important;
  border-color: var(--zrsld-chip-border) !important;
}
.zrsld-app .zrsld-analysis-annotation.zrsld-analysis-annotation:focus:not(:focus-visible) { outline: none !important; }
.zrsld-analysis-annotation.is-focused {
  z-index: 5;
  box-shadow: 0 8px 22px rgba(15,26,22,.32), 0 0 0 2px rgba(255,255,255,.98);
}
.zrsld-analysis-annotation.is-crowded:not(.is-focused) { border-style: dashed; }
.zrsld-analysis-annotation__kind {
  display: grid;
  place-items: center;
  min-width: 24px;
  color: #fff;
  background: var(--zrsld-result-accent);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: .05em;
  text-shadow: 0 1px 1px rgba(0,0,0,.3);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.zrsld-analysis-annotation__content {
  min-width: 0;
  display: grid;
  align-content: center;
  gap: 1px;
  padding: 4px 22px 4px 6px;
}
.zrsld-analysis-annotation__tag {
  overflow: hidden;
  color: var(--zrsld-chip-tag) !important;
  font-size: 7.5px;
  font-weight: 900;
  letter-spacing: .035em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}
.zrsld-analysis-annotation__content > strong,
.zrsld-analysis-annotation__marker-value {
  overflow: hidden;
  color: var(--zrsld-chip-foreground) !important;
  font-size: 10px;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zrsld-analysis-annotation__content > small {
  overflow: hidden;
  color: var(--zrsld-chip-muted) !important;
  font-size: 8px;
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zrsld-analysis-annotation.is-compact { grid-template-columns: 20px minmax(0,1fr); }
.zrsld-analysis-annotation.is-compact .zrsld-analysis-annotation__kind { min-width: 20px; font-size: 7px; }
.zrsld-analysis-annotation.is-compact .zrsld-analysis-annotation__content { grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 5px; padding: 3px 20px 3px 6px; }
.zrsld-analysis-annotation.is-compact .zrsld-analysis-annotation__tag { font-size: 7px; }
.zrsld-analysis-annotation.is-compact .zrsld-analysis-annotation__content > strong { font-size: 9px; }
.zrsld-analysis-annotation.is-marker { grid-template-columns: 18px minmax(0,1fr); border-radius: 12px; }
.zrsld-analysis-annotation.is-marker .zrsld-analysis-annotation__kind { min-width: 18px; font-size: 6.5px; }
.zrsld-analysis-annotation__marker-value { align-self: center; padding: 2px 18px 2px 5px; font-size: 8.5px; }
.zrsld-analysis-annotation.is-detail { grid-template-columns: 28px minmax(0,1fr); }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__kind { min-width: 28px; font-size: 8.5px; }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content { align-content: start; gap: 2px; padding: 5px 23px 7px 7px; }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__tag { font-size: 8.5px; }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content > strong { font-size: 12px; }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content > small { font-size: 8.5px; }
.zrsld-analysis-annotation__metrics {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 3px 7px;
  margin-top: 3px;
  padding-top: 4px;
  border-top: 1px solid var(--zrsld-chip-border);
}
.zrsld-analysis-annotation__metrics > span { min-width: 0; display: grid; gap: 0; }
.zrsld-analysis-annotation__metrics em {
  overflow: hidden;
  color: var(--zrsld-chip-metric-label) !important;
  font-size: 7.2px;
  font-style: normal;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zrsld-analysis-annotation__metrics b {
  overflow: hidden;
  color: var(--zrsld-chip-metric-value) !important;
  font-size: 8.2px;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics em,
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics b { overflow: visible; text-overflow: clip; white-space: normal; overflow-wrap: anywhere; }
.zrsld-analysis-annotation__toggle {
  position: absolute;
  top: 3px;
  right: 4px;
  display: grid;
  place-items: center;
  width: 16px;
  height: 16px;
  border: 2px solid var(--zrsld-result-accent);
  border-radius: 50%;
  color: var(--zrsld-result-accent);
  background: #fff;
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  pointer-events: none;
}
.zrsld-analysis-annotation.is-focused .zrsld-analysis-annotation__toggle {
  color: #fff;
  border-color: var(--zrsld-result-accent);
  background: var(--zrsld-result-accent);
}
.zrsld-analysis-annotation__note {
  grid-column: 1 / -1;
  margin: 3px 0 0;
  padding-top: 4px;
  border-top: 1px solid var(--zrsld-chip-border);
  color: var(--zrsld-chip-muted) !important;
  font-size: 6.9px;
  font-weight: 750;
  line-height: 1.35;
}

.zrsld-result-lens {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  height: 25px;
  overflow: hidden;
  border: 2px solid #2d6d53;
  border-radius: 6px;
  color: #163a2c;
  background: #e5f5ec;
  box-shadow: 0 1px 3px rgba(19,44,34,.16);
}
.zrsld-result-lens.is-short-circuit { border-color: #974228; color: #4a1f12; background: #ffebe2; }
.zrsld-result-lens.is-stale { border-color: #7a4a00; color: #4a2d00; background: #fff0c4; }
.zrsld-result-lens button,
.zrsld-result-lens select { height: 21px; border: 0; border-radius: 0; color: inherit; background: transparent; font-size: 8.5px; }
.zrsld-result-lens button { cursor: pointer; }
.zrsld-result-lens__study { display: flex; align-items: center; gap: 5px; padding: 0 6px; border-right: 1px solid currentColor !important; }
.zrsld-result-lens__study span { padding: 1px 4px; border-radius: 3px; color: #fff; background: #145c40; font-size: 7px; font-weight: 900; letter-spacing: .04em; }
.zrsld-result-lens.is-short-circuit .zrsld-result-lens__study span { background: #8a341d; }
.zrsld-result-lens.is-stale .zrsld-result-lens__study span { background: #6b4100; }
.zrsld-result-lens__study strong { max-width: 120px; overflow: hidden; font-size: 8.5px; font-weight: 900; text-overflow: ellipsis; white-space: nowrap; }
.zrsld-result-lens__mode { display: flex; align-items: center; gap: 3px; padding-left: 6px; }
.zrsld-result-lens__mode > span { color: inherit; font-size: 7.5px; font-weight: 800; }
.zrsld-result-lens__mode select { width: 58px; padding: 0 14px 0 2px; font-weight: 900; cursor: pointer; }
.zrsld-result-lens__count { padding: 0 6px; color: inherit; font-size: 7.5px; font-weight: 750; }
.zrsld-result-lens__stale { padding: 0 7px; font-size: 8px; font-weight: 900; }
.zrsld-result-lens__clear { width: 23px; padding: 0; border-left: 1px solid currentColor !important; font-size: 14px !important; line-height: 1; }
.zrsld-result-lens button:hover,
.zrsld-result-lens select:hover { background: rgba(255,255,255,.82); }
.zrsld-result-lens button:focus-visible,
.zrsld-result-lens select:focus-visible { outline: 2px solid #111820; outline-offset: -2px; }

@media (prefers-contrast: more) {
  .zrsld-analysis-annotation { border-width: 3px; box-shadow: 0 0 0 1px #fff; }
  .zrsld-analysis-leader { height: 2px; }
  .zrsld-analysis-annotation__tag,
  .zrsld-analysis-annotation__content > small,
  .zrsld-analysis-annotation__metrics em,
  .zrsld-analysis-annotation__note { font-weight: 900; }
  .zrsld-result-lens { border-width: 3px; box-shadow: none; }
}

@media (forced-colors: active) {
  .zrsld-analysis-annotation,
  .zrsld-result-lens { border-color: ButtonText !important; color: ButtonText !important; background-color: Canvas !important; background-image: none !important; box-shadow: none; }
  .zrsld-analysis-annotation__kind,
  .zrsld-analysis-annotation.is-focused .zrsld-analysis-annotation__toggle,
  .zrsld-result-lens__study span { color: HighlightText; background: Highlight; }
  .zrsld-analysis-annotation__toggle { border-color: ButtonText; color: ButtonText; background: Canvas; }
  .zrsld-analysis-leader,
  .zrsld-analysis-leader > span { background: CanvasText; }
  .zrsld-analysis-leader::before { border-color: CanvasText; background: Canvas; }
}

.zrsld-analysis-display-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 11px;
  border: 1px solid #cbd5da;
  border-radius: 8px;
  background: #f7faf9;
}
.zrsld-analysis-display-panel > div:first-child { min-width: 0; display: grid; gap: 2px; }
.zrsld-analysis-display-panel > div:first-child > span { color: #1f6a4c; font-size: 7.5px; font-weight: 900; letter-spacing: .07em; }
.zrsld-analysis-display-panel > div:first-child > strong { font-size: 10.5px; }
.zrsld-analysis-display-panel > div:first-child > small { max-width: 680px; color: var(--zrsld-muted); font-size: 8px; line-height: 1.35; }
.zrsld-analysis-display-options { flex: 0 0 auto; display: flex; align-items: center; gap: 3px; }
.zrsld-analysis-display-options button {
  min-width: 44px;
  height: 27px;
  padding: 0 8px;
  border: 1px solid #b9c4c9;
  border-radius: 5px;
  color: #3e4c54;
  background: #fff;
  font-size: 8px;
  font-weight: 800;
  cursor: pointer;
}
.zrsld-analysis-display-options button:hover { border-color: #87959d; background: #f4f6f7; }
.zrsld-analysis-display-options button.is-active { color: #fff; border-color: #1f6a4c; background: #1f6a4c; }
.zrsld-analysis-display-options > span { margin-left: 5px; color: var(--zrsld-muted); font-size: 8px; white-space: nowrap; }

@media (max-width: 980px) {
  .zrsld-analysis-display-panel { align-items: stretch; flex-direction: column; }
  .zrsld-analysis-display-options { flex-wrap: wrap; }
  .zrsld-result-lens__count { display: none; }
}

@media print {
  .zrsld-result-lens { display: none !important; }
}

/* v1.6.7 — live on-SLD load-flow and short-circuit operation */
.zrsld-shell.is-live-analysis .zrsld-equipment-node.is-operable::before {
  border-color: rgba(31,106,76,.68);
  background: rgba(232,247,239,.22);
}
.zrsld-shell.is-live-analysis .zrsld-equipment-node.is-open::before { border-color: rgba(177,61,50,.7); }
.zrsld-shell.is-fault-placement .zrsld-canvas-panel .react-flow__pane,
.zrsld-shell.is-fault-placement .zrsld-canvas-panel .react-flow__node,
.zrsld-shell.is-fault-placement .zrsld-canvas-panel .react-flow__edge { cursor: crosshair !important; }

.zrsld-fault-marker {
  --zrsld-fault-color: #b53a2e;
  position: absolute;
  z-index: 90;
  width: 34px;
  height: 34px;
  padding: 0;
  transform: translate(-50%,-50%) scale(var(--zrsld-fault-inverse-scale,1));
  transform-origin: center;
  border: 0;
  border-radius: 50%;
  color: #fff;
  background: transparent;
  cursor: move;
  pointer-events: auto;
  filter: drop-shadow(0 2px 5px rgba(83,27,20,.28));
}
.zrsld-fault-marker::before,
.zrsld-fault-marker::after,
.zrsld-fault-marker > span,
.zrsld-fault-marker > i {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--zrsld-fault-color);
  pointer-events: none;
}
.zrsld-fault-marker::before { width: 34px; height: 3px; transform: translate(-50%,-50%); }
.zrsld-fault-marker::after { width: 3px; height: 34px; transform: translate(-50%,-50%); }
.zrsld-fault-marker > span { width: 25px; height: 3px; transform: translate(-50%,-50%) rotate(45deg); }
.zrsld-fault-marker > i { width: 25px; height: 3px; transform: translate(-50%,-50%) rotate(-45deg); }
.zrsld-fault-marker > b {
  position: absolute;
  inset: 7px;
  display: grid;
  place-items: center;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--zrsld-fault-color);
  font: 900 8px/1 Arial,sans-serif;
  pointer-events: none;
}
.zrsld-fault-marker > b .zrsld-icon { width: 11px; height: 11px; color: #fff; fill: currentColor; stroke: currentColor; }
.zrsld-fault-marker:hover,
.zrsld-fault-marker:focus-visible { --zrsld-fault-color: #8e251e; outline: none; }
.zrsld-fault-marker:focus-visible > b { box-shadow: 0 0 0 3px rgba(255,255,255,.9), 0 0 0 5px #e95d2a; }
.zrsld-fault-marker.is-armed { --zrsld-fault-color: #e95d2a; }
.zrsld-fault-marker.is-calculating { animation: zrsld-fault-pulse 1s ease-in-out infinite; }
@keyframes zrsld-fault-pulse {
  0%,100% { opacity: 1; }
  50% { opacity: .48; }
}

.zrsld-fault-tool-button .zrsld-icon { color: #ffd7c8; }
.zrsld-topbar .zrsld-fault-tool-button.is-active,
.zrsld-topbar .zrsld-fault-tool-button.is-armed {
  color: #fff;
  border-color: #d9532d;
  background: #b94326;
}
.zrsld-topbar .zrsld-fault-tool-button.is-armed { box-shadow: 0 0 0 2px rgba(255,255,255,.12), 0 0 0 4px rgba(233,93,42,.28); }

.zrsld-fault-placement-cursor {
  position: absolute;
  z-index: 120;
  max-width: min(290px,calc(100% - 28px));
  display: flex;
  align-items: center;
  gap: 7px;
  transform: translate(13px,13px);
  color: #344149;
  pointer-events: none;
  filter: drop-shadow(0 4px 10px rgba(27,34,39,.22));
}
.zrsld-fault-placement-cursor__symbol {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  display: grid;
  place-items: center;
  border: 2px solid #fff;
  border-radius: 50%;
  color: #fff;
  background: #7b858c;
  box-shadow: 0 0 0 2px rgba(77,89,96,.45);
}
.zrsld-fault-placement-cursor__symbol .zrsld-icon { width: 17px; height: 17px; fill: currentColor; stroke: currentColor; }
.zrsld-fault-placement-cursor em {
  min-width: 0;
  overflow: hidden;
  padding: 5px 8px;
  border: 1px solid rgba(130,142,149,.65);
  border-radius: 999px;
  color: #344149;
  background: rgba(255,255,255,.96);
  font-size: 8px;
  font-style: normal;
  font-weight: 850;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zrsld-fault-placement-cursor.is-valid .zrsld-fault-placement-cursor__symbol {
  background: #b94326;
  box-shadow: 0 0 0 2px rgba(185,67,38,.45), 0 0 0 7px rgba(233,93,42,.14);
}
.zrsld-fault-placement-cursor.is-valid em { color: #6f2f1e; border-color: #dfad9c; background: rgba(255,247,243,.98); }
.zrsld-fault-placement-cursor.is-invalid { opacity: .78; }
.zrsld-fault-placement-cursor.is-calculating .zrsld-fault-placement-cursor__symbol { animation: zrsld-fault-pulse .9s ease-in-out infinite; }


@media (prefers-reduced-motion: reduce) {
  .zrsld-fault-marker.is-calculating,
  .zrsld-fault-placement-cursor.is-calculating .zrsld-fault-placement-cursor__symbol { animation: none; opacity: .72; }
}

@media print {
  .zrsld-fault-placement-cursor,
  .zrsld-fault-marker { display: none !important; }
}

.zrsld-analysis__fault-target {
  max-width: 330px;
  overflow: hidden;
  padding: 5px 8px;
  border: 1px solid #e2c1b5;
  border-radius: 5px;
  color: #7a3824;
  background: #fff4ef;
  font-size: 9px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 980px) {
  .zrsld-mode-group .zrsld-button span { display: none; }
  .zrsld-mode-group .zrsld-button { width: 32px; min-width: 32px; padding: 0; }
}

/* v1.6.7 live-study handoff and breaker-recalculation feedback. */
.zrsld-node-recalculation {
  position: absolute;
  z-index: 12;
  left: 50%;
  top: -27px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  min-height: 19px;
  padding: 2px 6px;
  transform: translateX(-50%);
  border: 1px solid #b7c9c0;
  border-radius: 999px;
  color: #174e39;
  background: rgba(240,250,245,.98);
  box-shadow: 0 4px 12px rgba(20,28,33,.16);
  font-size: 7px;
  font-weight: 900;
  letter-spacing: .02em;
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
}
.zrsld-node-recalculation .zrsld-icon { width: 11px; height: 11px; fill: currentColor; stroke: currentColor; }
.zrsld-equipment-node.is-live-recalculating .zrsld-node-recalculation {
  color: #8a3c13;
  border-color: #e3af83;
  background: rgba(255,246,236,.99);
  animation: zrsld-live-recalculation-pulse .8s ease-in-out infinite;
}
.zrsld-equipment-node.has-live-recalculation-error .zrsld-node-recalculation {
  color: #842c25;
  border-color: #d9a7a2;
  background: rgba(255,240,238,.99);
}
.zrsld-equipment-node.is-live-recalculating::after {
  content: '';
  position: absolute;
  z-index: -1;
  inset: -8px;
  border: 2px solid rgba(233,93,42,.54);
  border-radius: 9px;
  pointer-events: none;
  animation: zrsld-live-recalculation-ring 1s ease-out infinite;
}
@keyframes zrsld-live-recalculation-pulse {
  0%,100% { opacity: 1; transform: translateX(-50%) scale(1); }
  50% { opacity: .62; transform: translateX(-50%) scale(.98); }
}
@keyframes zrsld-live-recalculation-ring {
  0% { opacity: .9; transform: scale(.94); }
  100% { opacity: 0; transform: scale(1.14); }
}
@media (prefers-reduced-motion: reduce) {
  .zrsld-equipment-node.is-live-recalculating .zrsld-node-recalculation,
  .zrsld-equipment-node.is-live-recalculating::after { animation: none; }
}

/* v1.6.7 — explicit non-destructive study reset in the upper toolbar. */
.zrsld-topbar .zrsld-clear-study-button:not(:disabled) {
  color: #f7e8c8;
  border-color: #756443;
  background: #3a3d38;
}
.zrsld-topbar .zrsld-clear-study-button:hover:not(:disabled) {
  color: #fff;
  border-color: #a98a4f;
  background: #58482d;
}
.zrsld-topbar .zrsld-clear-study-button .zrsld-icon { color: #f0c978; }


/* v1.7.1 — viewport-safe command toolbar and readable expanded study cards. */
.zrsld-topbar {
  min-height: 0;
  width: 100%;
  max-width: 100%;
  display: grid;
  grid-template-rows: auto auto;
  align-items: stretch;
  gap: 0;
  padding: 0;
  overflow: hidden;
  scrollbar-width: none;
}
.zrsld-topbar::-webkit-scrollbar { display: none; }
.zrsld-topbar__primary,
.zrsld-topbar__secondary {
  min-width: 0;
  width: 100%;
  max-width: 100%;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.zrsld-topbar__primary {
  min-height: 50px;
  padding: 6px 8px;
  background: var(--zrsld-charcoal);
}
.zrsld-topbar__secondary {
  min-height: 38px;
  padding: 4px 8px;
  border-top: 1px solid rgba(255,255,255,.09);
  background: #28323a;
}
.zrsld-topbar .zrsld-brand {
  min-width: 0;
  padding-right: 6px;
}
.zrsld-topbar .zrsld-brand__mark {
  width: 32px;
  height: 32px;
  border-radius: 7px;
}
.zrsld-toolbar-group-label {
  flex: 0 0 auto;
  color: #aeb9c0;
  font-size: 7.5px;
  font-weight: 850;
  letter-spacing: .08em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}
.zrsld-mode-group,
.zrsld-edit-group,
.zrsld-view-group,
.zrsld-file-group,
.zrsld-more-group,
.zrsld-study-group,
.zrsld-project-group {
  min-width: 0;
  display: flex;
  flex: 0 1 auto;
  align-items: center;
  flex-wrap: nowrap;
  gap: 3px;
  margin: 0;
  padding: 0;
  border: 0;
}
.zrsld-mode-group,
.zrsld-edit-group,
.zrsld-view-group,
.zrsld-file-group,
.zrsld-more-group {
  padding-right: 7px;
  border-right: 1px solid rgba(255,255,255,.12);
}
.zrsld-project-group { margin-left: auto; }
.zrsld-study-group {
  flex: 0 0 auto;
  gap: 5px;
  padding: 4px 5px 4px 7px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 8px;
  background: rgba(255,255,255,.055);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}
.zrsld-study-group .zrsld-toolbar-group-label { color: #dce4e8; }
.zrsld-topbar .zrsld-drawing-mode-button {
  height: 32px;
  padding-inline: 8px;
}
.zrsld-topbar .zrsld-study-action {
  height: 36px;
  min-width: 106px;
  padding-inline: 12px;
  border-width: 1px;
  border-radius: 7px;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  box-shadow: 0 1px 2px rgba(0,0,0,.2), inset 0 1px 0 rgba(255,255,255,.08);
}
.zrsld-topbar .zrsld-study-action .zrsld-icon {
  width: 17px;
  height: 17px;
  flex-basis: 17px;
}
.zrsld-topbar .zrsld-study-action--load-flow,
.zrsld-topbar .zrsld-study-action--load-flow:hover:not(:disabled),
.zrsld-topbar .zrsld-study-action--load-flow.is-active {
  color: #fff;
  border-color: #5b9f82;
  background: #1d674b;
}
.zrsld-topbar .zrsld-study-action--load-flow:hover:not(:disabled) { background: #237b59; }
.zrsld-topbar .zrsld-study-action--load-flow.is-active {
  background: #25865f;
  box-shadow: 0 0 0 2px rgba(255,255,255,.13), 0 0 0 4px rgba(61,174,124,.24);
}
.zrsld-topbar .zrsld-study-action--short-circuit,
.zrsld-topbar .zrsld-study-action--short-circuit:hover:not(:disabled),
.zrsld-topbar .zrsld-study-action--short-circuit.is-active,
.zrsld-topbar .zrsld-study-action--short-circuit.is-armed {
  color: #fff;
  border-color: #c77a5e;
  background: #91442d;
}
.zrsld-topbar .zrsld-study-action--short-circuit:hover:not(:disabled) { background: #aa4d30; }
.zrsld-topbar .zrsld-study-action--short-circuit.is-active,
.zrsld-topbar .zrsld-study-action--short-circuit.is-armed {
  background: #bc4e2d;
  box-shadow: 0 0 0 2px rgba(255,255,255,.13), 0 0 0 4px rgba(233,93,42,.25);
}
.zrsld-topbar .zrsld-clear-study-button {
  height: 32px;
  min-width: 68px;
  padding-inline: 8px;
}
.zrsld-topbar__primary .zrsld-project-group .zrsld-button {
  height: 32px;
  padding-inline: 8px;
}
.zrsld-topbar__secondary .zrsld-button {
  height: 29px;
  min-width: 29px;
  padding-inline: 7px;
  font-size: 9.5px;
}
.zrsld-topbar__secondary .zrsld-button.is-compact {
  width: 29px;
  min-width: 29px;
  padding: 0;
}
.zrsld-topbar__secondary .zrsld-icon {
  width: 14px;
  height: 14px;
  flex-basis: 14px;
}
.zrsld-topbar__secondary .zrsld-connection-kind {
  height: 30px;
  padding-right: 7px;
}
.zrsld-topbar__secondary .zrsld-connection-kind select { height: 29px; }
.zrsld-topbar__secondary .zrsld-top-zoom-readout {
  min-width: 42px;
  font-size: 9px;
}

/* Expanded numerical cards become a deliberate reading surface. */
.zrsld-analysis-annotation.is-detail {
  grid-template-columns: 34px minmax(0,1fr);
  border-width: 2px;
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(15,26,22,.34), 0 0 0 2px rgba(255,255,255,.98);
  cursor: pointer;
  user-select: text;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__kind {
  min-width: 34px;
  font-size: 10px;
  letter-spacing: .08em;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content {
  min-height: 0;
  max-height: min(540px, calc(100vh - 190px));
  align-content: start;
  gap: 5px;
  padding: 13px 16px 15px;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #9eabb2 transparent;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content::-webkit-scrollbar { width: 8px; }
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: #9eabb2;
  background-clip: padding-box;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__tag {
  padding-right: 78px;
  color: #3d4b54 !important;
  font-size: 10px;
  letter-spacing: .055em;
  line-height: 1.25;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content > strong {
  padding-right: 78px;
  color: #101820 !important;
  font-size: 16px;
  font-weight: 900;
  line-height: 1.25;
  white-space: normal;
  overflow-wrap: anywhere;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__content > small {
  padding-right: 26px;
  color: #41515b !important;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  white-space: normal;
  overflow-wrap: anywhere;
}
.zrsld-analysis-annotation__detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 3px;
  padding: 7px 0 8px;
  border-top: 1px solid #d7dfe3;
  border-bottom: 1px solid #d7dfe3;
  color: #46545d;
  font-size: 10px;
  font-weight: 750;
}
.zrsld-analysis-annotation__state {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 8px;
  border: 1px solid #9ab7a8;
  border-radius: 999px;
  color: #174d38;
  background: #e7f5ed;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.zrsld-analysis-annotation__state.is-warning {
  color: #5d3b05;
  border-color: #d7b36c;
  background: #fff2cf;
}
.zrsld-analysis-annotation__state.is-danger {
  color: #77231d;
  border-color: #d7a19d;
  background: #fde8e6;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 7px;
  margin-top: 3px;
  padding-top: 0;
  border-top: 0;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics > span {
  min-width: 0;
  min-height: 54px;
  display: grid;
  align-content: start;
  gap: 3px;
  padding: 9px 10px;
  border: 1px solid #d8e0e4;
  border-radius: 7px;
  background: rgba(255,255,255,.9);
  box-shadow: inset 3px 0 0 color-mix(in srgb, var(--zrsld-result-accent) 65%, transparent);
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics > span.is-wide {
  grid-column: 1 / -1;
  min-height: 0;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics em {
  color: #46545d !important;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .025em;
  line-height: 1.25;
  text-transform: uppercase;
  white-space: normal;
  overflow-wrap: anywhere;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics b {
  color: #111820 !important;
  font-size: 13px;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
  line-height: 1.35;
  white-space: normal;
  overflow-wrap: anywhere;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__note {
  display: grid;
  gap: 4px;
  margin: 3px 0 0;
  padding: 9px 10px;
  border: 1px solid #d7c28f;
  border-radius: 7px;
  color: #4c3a12 !important;
  background: #fff8e8;
  font-size: 11.5px;
  font-weight: 650;
  line-height: 1.55;
}
.zrsld-analysis-annotation__note > strong {
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.zrsld-analysis-annotation__toggle {
  transition: width .12s ease, border-radius .12s ease, background .12s ease, color .12s ease;
}
.zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__toggle {
  top: 10px;
  right: 10px;
  width: auto;
  min-width: 66px;
  height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 9px;
  letter-spacing: .02em;
}

@supports not (color: color-mix(in srgb, #000 50%, transparent)) {
  .zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics > span { box-shadow: inset 3px 0 0 var(--zrsld-result-accent); }
}

@media (max-width: 1320px) {
  .zrsld-topbar__primary .zrsld-brand div { display: none; }
  .zrsld-topbar__primary .zrsld-drawing-mode-button span,
  .zrsld-topbar__primary .zrsld-project-group .zrsld-button span { display: none; }
  .zrsld-topbar__primary .zrsld-drawing-mode-button,
  .zrsld-topbar__primary .zrsld-project-group .zrsld-button {
    width: 32px;
    min-width: 32px;
    padding: 0;
  }
  .zrsld-topbar__secondary .zrsld-file-group .zrsld-button span { display: none; }
  .zrsld-topbar__secondary .zrsld-file-group .zrsld-button { width: 29px; min-width: 29px; padding: 0; }
}

@media (max-width: 900px) {
  .zrsld-topbar__primary,
  .zrsld-topbar__secondary { gap: 4px; }
  .zrsld-toolbar-group-label { display: none; }
  .zrsld-study-group {
    order: 3;
    flex: 1 0 100%;
    justify-content: center;
    padding: 4px;
  }
  .zrsld-project-group { margin-left: auto; }
  .zrsld-mode-group,
  .zrsld-edit-group,
  .zrsld-view-group,
  .zrsld-file-group,
  .zrsld-more-group { padding-right: 4px; }
}

@media (max-width: 620px) {
  .zrsld-topbar .zrsld-study-action { min-width: 0; flex: 1 1 128px; }
  .zrsld-topbar .zrsld-clear-study-button { flex: 0 0 58px; min-width: 58px; }
  .zrsld-topbar__secondary { justify-content: center; }
  .zrsld-analysis-annotation.is-detail {
    width: min(360px, calc(100vw - 20px)) !important;
  }
  .zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics { grid-template-columns: 1fr; }
  .zrsld-analysis-annotation.is-detail .zrsld-analysis-annotation__metrics > span.is-wide { grid-column: auto; }
}