/* ============================================================================
   INTERACTIVE HOOKS - REQUIRED BY JS, DO NOT REMOVE WHEN TRIMMING STYLES
   These classes are created/toggled by app.js and scl-sld.js. Removing their
   rules silently breaks features (the elements still work, but lose their
   affordance/visibility):
     .sld-toggle, .sld-toggle button, .sld-toggle--active  -> IEC/IEEE switch
     .sld-cbr--fill, .sld-pivot                            -> IEEE symbol variants
     .sld-band--hv, .sld-band--lv                          -> voltage-level bands
     .sld-plant--dim, .sld-ied-layer(--on), .sld-ied*      -> IED view (dim + overlay)
     .sld-ied--faded/--related/--focus, .sld-ied-link--*   -> IED hover focus
     .sld-ied__token, .sld-ied__token--off                 -> IED service tokens (click-isolate)
     .sld-sym--focus + @keyframes sld-focus-pulse          -> reverse-nav highlight
     .health-arc__order, .health-arc__order select         -> arc "Order by" control
     .code-line--sld, .code-line__number--sld              -> clickable XML->SLD lines
     .health-viewtabs, .health-viewtab--active             -> SLD/comm view toggle
     .health-arc__legend-item, ...--off                    -> clickable service toggle
     .btn--meter, .btn-meter__label/__track/__bar          -> export usage meter / upgrade
     .btn--meter[hidden]                                   -> meter hidden once paid
     .btn--meter-attn                                      -> meter state (limit reached)
     .file-chips, .file-chip, ...--primary/--failed        -> E1 multi-file project chips
     .file-chip__kind/__name/__status/__remove             -> chip internals (remove = supplements only)
     .health-files                                         -> loaded-files line in the health report
     .int-block/-head/-back/-title/-jump/-body             -> H1 IED interior block (Ctrl+click an IED)
     .int-col, .int-term--goose/--sv/--report              -> interior I/O columns, service-coloured dots
     .int-fgroup, .int-token, .int-system, .int-datasets   -> interior function tokens + footer
     .int-token--btn                                       -> clickable protection token (H2)
     .int-char, .int-char__* (svg classes)                 -> PTOC inverse-time characteristic tile
     .int-set, .int-set__tag/--file/__row/__note           -> settings list / honest no-settings panel
     .int-set__row--edited/--assumed, .int-set__flag(--assumed) -> per-value provenance (edited amber, assumed magenta)
     .int-set__tag--pending, .int-token--pending           -> pending/unsaved state signal (blue, NOT provenance)
     .int-set__row--editing, .int-edit__btn/__input(--invalid)/__select -> inline row editor (edit/add/apply/revert)
     .int-char__prov--edited/--assumed                     -> curve provenance label hues
     .int-skel, .int-cover, .int-set__row--undeclared      -> ED2 skeleton diagnostic + settings coverage line
   The single-line box (.sld-scroller / .health-arc__scroller) must keep
   position: relative for the overlay chips to anchor correctly.
   ============================================================================ */
:root {
  color-scheme: dark;
  --bg: #0b1118;
  --panel: #111a24;
  --panel-2: #152130;
  --border: #253447;
  --border-strong: #39506b;
  --text: #e7eef8;
  --muted: #9fb0c5;
  --muted-2: #6f8196;
  --accent: #71c7ec;
  --accent-strong: #9fe4ff;
  --critical: #ff6b6b;
  --warning: #ffbf5f;
  --assumed: #d678d8;
  --info: #75d39b;
  --code-bg: #080c12;
  --line-highlight: rgba(113, 199, 236, 0.22);
  --row-height: 22px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(113, 199, 236, 0.12), transparent 32rem),
    linear-gradient(180deg, #0b1118 0%, #081019 100%);
  color: var(--text);
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-header,
.app-shell {
  width: min(1540px, calc(100vw - 32px));
  margin-inline: auto;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    column-gap: var(--gap);
    row-gap: 8px;
    padding: 10px calc(16px + 18px + 2px);
    border-bottom: 1px solid var(--border);
    background: color-mix(in oklab, var(--bg) 92%, transparent);
    backdrop-filter: blur(10px);
}

/* Compact brand: title over a marquee subhead (comtrade-style, dark-only). */
.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  justify-self: center;
  text-align: center;
  align-items: center;
}

.brand__title {
  font-size: 32px;
  font-weight: 650;
  line-height: 1.1;
}

.brand__subtitle {
  font-size: 18px;
  color: var(--muted);
  margin-top: 0;
  line-height: 1.2;
}

.brand__title:hover {
  color: var(--accent-strong);
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.toolbar__status {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
}

.toolbar__status .status-label {
  margin: 0;
}

.toolbar__status strong {
  font-size: 0.92rem;
  color: var(--text);
}

.toolbar__export {
  background: rgba(8, 12, 18, 0.6);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 5px 8px;
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}

.toolbar__export:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Export usage meter / upgrade button (comtrade-style .btn--meter). */
.btn--meter {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  gap: 3px;
  min-width: 9rem;
  padding: 5px 10px;
  background: rgba(8, 12, 18, 0.6);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 0.76rem;
}

/* Honor the hidden attribute; .btn--meter's display would otherwise override it. */
.btn--meter[hidden] {
  display: none;
}

.btn--meter:hover {
  border-color: var(--accent);
}

.btn-meter__label {
  line-height: 1;
  letter-spacing: 0.01em;
  text-align: center;
}

.btn-meter__track {
  height: 4px;
  border-radius: 2px;
  background: rgba(128, 160, 220, 0.18);
  overflow: hidden;
}

.btn-meter__bar {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.btn--meter-attn {
  border-color: #ffbf5f;
}

.eyebrow,
.metric-label,
.status-label {
  color: var(--accent);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
  font-weight: 700;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.subhead,
.ingestion-panel p,
.pane-header p {
  color: var(--muted);
  line-height: 1.55;
}

.subhead {
  display:flex;
  align-items: center;
  max-width: 460px;
  margin: 0;
  overflow: hidden;
  white-space: nowrap;
  font-size: 1rem;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.subhead__text {
  display: inline-block;
  padding-left: 100%;
  animation: scl-marquee 18s linear infinite;
}

.subhead:hover .subhead__text {
  animation-play-state: paused;
}

@keyframes scl-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}

@media (prefers-reduced-motion: reduce) {
  .subhead__text {
    animation: none;
    padding-left: 0;
  }
}

.ingestion-panel,
.summary-grid article,
.diagnostic-pane,
.viewer-pane {
  background: linear-gradient(180deg, rgba(21, 33, 48, 0.94), rgba(13, 21, 31, 0.94));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.app-shell {
  display: grid;
  gap: 16px;
  padding-bottom: 30px;
}

.ingestion-panel {
  border-radius: var(--radius-lg);
  padding: 18px;
  display: grid;
  grid-template-columns: 1.1fr 1.2fr 1fr;
  gap: 18px;
  align-items: center;
}

.drop-zone {
  position: relative;
  min-height: 138px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: rgba(8, 12, 18, 0.62);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 18px;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(113, 199, 236, 0.08);
  transform: translateY(-1px);
}

.drop-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-zone__icon {
  display: inline-grid;
  place-items: center;
  min-width: 54px;
  height: 34px;
  padding-inline: 10px;
  border-radius: 999px;
  border: 1px solid rgba(113, 199, 236, 0.5);
  color: var(--accent-strong);
  background: rgba(113, 199, 236, 0.09);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.drop-zone__title,
.drop-zone__hint {
  display: block;
}

.drop-zone__title {
  font-weight: 800;
}

.drop-zone__hint {
  margin-top: 4px;
  color: var(--muted-2);
  font-size: 0.88rem;
}

.progress-wrap {
  display: grid;
  gap: 8px;
}

.progress-meta,
.file-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.88rem;
}

.progress-track {
  overflow: hidden;
  height: 12px;
  border-radius: 999px;
  background: #070b11;
  border: 1px solid var(--border);
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 140ms linear;
}

.file-meta {
  display: grid;
  justify-content: unset;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-top: 4px;
}

/* E1 multi-file project chips (primary + supplements). */
.file-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  background: rgba(8, 12, 18, 0.6);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text);
  max-width: 100%;
}

.file-chip--primary {
  border-color: var(--accent);
}

.file-chip--failed {
  border-color: var(--critical);
}

.file-chip__kind {
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.file-chip__name {
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-chip__status {
  color: var(--muted);
  white-space: nowrap;
}

.file-chip__remove {
  background: none;
  border: none;
  padding: 0 2px;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
}

.file-chip__remove:hover {
  color: var(--text);
}

.health-files {
  font-size: 0.8rem;
  color: var(--muted);
  margin: -6px 0 14px;
}

/* H1 IED interior block (Ctrl+click an IED box in the IED view).
   80% width box with a light white-gray border; margin-top clears the floating
   view tabs; 46 + 754 = 800px so the pane height matches the diagram views.
   The generous interior space is reserved for H2/H3: settings characteristics
   and scheme logic. */
.int-block {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 80%;
  margin: 46px auto 0;
  min-height: 754px;
  padding: 18px 22px;
  border: 1px solid rgba(231, 238, 248, 0.32);
  border-radius: var(--radius-md);
  background: rgba(8, 12, 18, 0.35);
}

.int-head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.int-back,
.int-jump {
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  color: var(--text);
  font: inherit;
  font-size: 0.78rem;
  padding: 4px 10px;
  cursor: pointer;
}

.int-back:hover,
.int-jump:hover {
  border-color: var(--accent);
}

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

.int-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1px;
  margin: 0 auto;
}

.int-title__name {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
}

.int-title__meta {
  font-size: 0.76rem;
  color: var(--muted);
}

.int-body {
  display: grid;
  grid-template-columns: minmax(150px, 0.85fr) minmax(0, 1.3fr) minmax(150px, 0.85fr);
  gap: 16px;
}

.int-col__head {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.int-term {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.79rem;
  color: var(--text);
  padding: 3px 0;
  min-width: 0;
}

.int-term__dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--muted);
}

.int-term--goose .int-term__dot { background: #71c7ec; }
.int-term--sv .int-term__dot { background: #ffbf5f; }
.int-term--report .int-term__dot { background: #75d39b; }

/* Output column mirrors the input column: terminals hug the right border. */
.int-col--out .int-col__head {
  text-align: right;
}

.int-col--out .int-term {
  flex-direction: row-reverse;
}

.int-col--out .int-term__note {
  margin-left: 0;
  margin-right: auto;
}

.int-term__label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.int-term__note {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.72rem;
  white-space: nowrap;
}

.int-empty {
  font-size: 0.78rem;
  color: var(--muted);
}

.int-fns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.int-fgroup__head {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 5px;
}

.int-fgroup__tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.int-token {
  font-size: 0.78rem;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px 10px;
}

.int-system {
  align-self: flex-start;
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 999px;
  padding: 3px 10px;
}

/* H2 protection characteristics. Protection accent = --critical (distinct
   from the GOOSE/SV/Report service hues). */
.int-token--btn {
  font: inherit;
  background: transparent;
  cursor: pointer;
}

.int-token--btn:hover {
  border-color: var(--critical);
  color: #fff;
}

.int-char {
  display: flex;
  justify-content: center;
}

.int-char__svg {
  width: 100%;
  max-width: 660px;
  height: auto;
  display: block;
}

.int-char__grid { stroke: rgba(57, 80, 107, 0.35); }
.int-char__axis { stroke: var(--border-strong); }
.int-char__tick { fill: var(--muted); font-size: 11px; }
.int-char__curve { stroke: var(--critical); stroke-width: 2.5; }
.int-char__op { fill: #ffd9d4; stroke: var(--critical); stroke-width: 2; }
.int-char__oplabel { fill: var(--text); font-size: 11px; }
.int-char__pill { fill: var(--critical); }
.int-char__pilltext { fill: #401512; font-size: 11px; font-weight: 700; }
.int-char__type { fill: var(--muted); font-size: 11px; }
.int-char__prov { fill: var(--info); font-size: 11px; }
.int-char__settings { fill: var(--text); font-size: 12px; }

.int-set {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 460px;
  margin: 10px auto 0;
}

.int-set__tag {
  align-self: flex-start;
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 999px;
  padding: 3px 10px;
}

.int-set__tag--file {
  color: var(--info);
  border-style: solid;
  border-color: rgba(117, 211, 155, 0.4);
}

.int-set__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8rem;
  border-bottom: 0.5px solid rgba(37, 52, 71, 0.6);
  padding: 4px 0;
}

.int-set__key { color: var(--muted); }
.int-set__val { color: var(--text); }

.int-set__note {
  font-size: 0.75rem;
  color: var(--warning);
}

/* ED1/ED2 editor. Provenance hues are per VALUE and never reused for state:
   "edited" amber (file value changed), "assumed" magenta (value the file
   lacked, least grounded, at least as cautionary as edited), "from file"
   green. The pending/unsaved STATE is a separate blue signal (panel tag,
   token dot), so amber never does double duty. */
.int-set__tag--pending {
  color: var(--accent);
  border-style: solid;
  border-color: rgba(113, 199, 236, 0.45);
}

.int-set__row--edited .int-set__val { color: var(--warning); }

.int-set__row--assumed .int-set__val { color: var(--assumed); }

.int-set__flag {
  font-size: 0.68rem;
  color: var(--warning);
  border: 1px solid rgba(255, 191, 95, 0.45);
  border-radius: 999px;
  padding: 1px 7px;
  align-self: center;
}

.int-set__flag--assumed {
  color: var(--assumed);
  border-color: rgba(214, 120, 216, 0.45);
}

.int-set__row--undeclared .int-set__note { font-size: 0.72rem; }

.int-skel {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  max-width: 460px;
}

.int-cover {
  font-size: 0.72rem;
  color: var(--muted-2);
  margin-top: 6px;
}

.int-set__row--editing { align-items: center; }

.int-edit__btn {
  font: inherit;
  font-size: 0.72rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 1px 9px;
  cursor: pointer;
}

.int-edit__btn:hover { color: #fff; border-color: var(--accent); }

.int-edit__input {
  font: inherit;
  font-size: 0.8rem;
  flex: 1;
  min-width: 0;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 2px 8px;
}

.int-edit__input:focus { outline: 1px solid var(--accent); }

.int-edit__input--invalid { border-color: var(--critical); }

.int-edit__select { appearance: auto; }

.int-token--pending { border-color: var(--accent); }

.int-token--pending::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.int-char__prov--edited { fill: var(--warning); }

.int-char__prov--assumed { fill: var(--assumed); }

.int-datasets {
  font-size: 0.78rem;
  color: var(--muted);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.summary-grid article {
  border-radius: var(--radius-md);
  padding: 16px;
}

.summary-grid strong {
  display: block;
  font-size: 1.35rem;
}

.split-pane {
  display: grid;
  grid-template-columns: minmax(340px, 0.38fr) minmax(520px, 1fr);
  gap: 16px;
  min-height: min(720px, calc(100vh - 330px));
}

.diagnostic-pane,
.viewer-pane {
  min-height: 520px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(8, 12, 18, 0.42);
}

.pane-header p {
  margin-bottom: 0;
  font-size: 0.88rem;
}

.ghost-button {
  border: 1px solid var(--border-strong);
  background: rgba(113, 199, 236, 0.08);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
}

.ghost-button:hover {
  border-color: var(--accent);
}

.severity-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.severity-tab {
  border: 1px solid var(--border);
  background: rgba(8, 12, 18, 0.5);
  color: var(--muted);
  border-radius: 999px;
  padding: 8px;
}

.severity-tab.active {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(113, 199, 236, 0.1);
}

.diagnostic-list {
  list-style: none;
  margin: 0;
  padding: 10px;
  overflow: auto;
}

.diagnostic-item {
  margin: 0 0 10px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--info);
  background: rgba(8, 12, 18, 0.44);
  border-radius: var(--radius-md);
  padding: 12px;
}

.diagnostic-item[data-severity="Critical"] {
  border-left-color: var(--critical);
}

.diagnostic-item[data-severity="Warning"] {
  border-left-color: var(--warning);
}

.diagnostic-item button {
  width: 100%;
  display: grid;
  gap: 6px;
  text-align: left;
  color: inherit;
  background: transparent;
  border: 0;
  padding: 0;
}

.diagnostic-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 4px 8px;
  background: rgba(117, 211, 155, 0.13);
  color: var(--info);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.diagnostic-item[data-severity="Critical"] .badge {
  background: rgba(255, 107, 107, 0.13);
  color: var(--critical);
}

.diagnostic-item[data-severity="Warning"] .badge {
  background: rgba(255, 191, 95, 0.13);
  color: var(--warning);
}

.line-range {
  color: var(--muted-2);
  font-size: 0.78rem;
}

.diagnostic-message {
  color: var(--text);
  line-height: 1.45;
}

.empty-state {
  color: var(--muted-2);
  padding: 18px 8px;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}

.viewer-controls input {
  width: 120px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(8, 12, 18, 0.68);
  color: var(--text);
  padding: 8px 12px;
}

.code-scroller {
  position: relative;
  flex: 1;
  overflow: auto;
  background:
    linear-gradient(90deg, rgba(21, 33, 48, 0.48) 0 78px, transparent 78px),
    var(--code-bg);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: var(--row-height);
  contain: strict;
}

.code-spacer {
  width: 1px;
  min-height: 100%;
}

.visible-lines {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  will-change: transform;
}

.code-line {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  min-height: var(--row-height);
  height: var(--row-height);
  white-space: pre;
}

.code-line__number {
  color: var(--muted-2);
  text-align: right;
  padding: 0 14px 0 8px;
  user-select: none;
  border-right: 1px solid rgba(37, 52, 71, 0.76);
}

/* Equipment lines that map to a single-line item (click to jump to the SLD),
   and IED definition lines that map to the IED view (same affordance). */
.code-line--sld,
.code-line--ied {
  cursor: pointer;
}

.code-line--sld:hover,
.code-line--ied:hover {
  background: rgba(113, 199, 236, 0.12);
}

.code-line__number.code-line__number--sld {
  color: var(--accent);
  font-weight: 700;
}

.code-line--sld:hover .code-line__number--sld,
.code-line--ied:hover .code-line__number--sld {
  color: var(--accent-strong);
}

.code-line__text {
  padding-left: 12px;
  color: #cbd8e7;
  overflow: hidden;
  text-overflow: clip;
}

.code-line.highlight {
  background: var(--line-highlight);
  box-shadow: inset 3px 0 0 var(--accent);
}

.code-line.highlight .code-line__text {
  color: var(--accent-strong);
}

@media (max-width: 1100px) {
  .app-header,
  .ingestion-panel,
  .split-pane {
    grid-template-columns: 1fr;
  }

  .app-header {
    display: grid;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-pane {
    min-height: unset;
  }
}

@media (max-width: 720px) {
  .app-header,
  .app-shell {
    width: min(100vw - 20px, 1540px);
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }

  .ingestion-panel,
  .pane-header {
    padding: 14px;
  }

  .pane-header,
  .viewer-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .severity-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* SCL Health Report modal */
.ghost-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.health-dialog {
  width: 100vw;
  height: 100vh;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(21, 33, 48, 0.98), rgba(13, 21, 31, 0.98));
  color: var(--text);
  box-shadow: var(--shadow);
  overflow: hidden;
  max-width: 100vw;
  max-height: 100vh;
}

.health-dialog[open] {
  display: flex;
  flex-direction: column;
  animation: health-pop 180ms ease;
}

@keyframes health-pop {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

.health-dialog::backdrop {
  background: rgba(4, 8, 13, 0.62);
}

.health-dialog__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 8px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(8, 12, 18, 0.5);
}

.health-dialog__head > div {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 1rem;
}

.health-dialog__head > div .eyebrow {
  margin: 0;
}

.health-dialog__head h2 {
  margin-bottom: 0;
  font-size: 1.2rem;
}

.health-dialog__body {
  padding: 5px;
  overflow: auto;
  flex: 1;
  min-height: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.health-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 9px;
}

.health-stat {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(8, 12, 18, 0.44);
  padding: 12px 14px;
  display: grid;
  gap: 4px;
}

.health-stat__label {
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.health-stat__value {
  font-size: 1.25rem;
  overflow-wrap: anywhere;
}

.health-stat__sub {
  color: var(--muted-2);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

.health-section {
  display: grid;
  gap: 10px;
}

.health-section__title {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.health-severity {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.health-severity__chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  background: rgba(8, 12, 18, 0.5);
}

.health-severity__chip strong {
  font-size: 1.1rem;
}

.health-severity__chip[data-severity="Critical"] {
  border-color: var(--critical);
  color: var(--critical);
}

.health-severity__chip[data-severity="Warning"] {
  border-color: var(--warning);
  color: var(--warning);
}

.health-severity__chip[data-severity="Info"] {
  border-color: var(--info);
  color: var(--info);
}

.health-table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.health-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.health-table th,
.health-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.health-table th {
  color: var(--muted);
  font-weight: 700;
  position: sticky;
  top: 0;
  background: var(--panel-2);
}

.health-table tbody tr:last-child td {
  border-bottom: 0;
}

.health-table tr[data-flagged="ggio"] td {
  background: rgba(255, 191, 95, 0.08);
}

.health-list {
  display: grid;
  gap: 8px;
}

.health-list__line {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(8, 12, 18, 0.44);
  padding: 10px 14px;
}

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

.health-list__value {
  color: var(--text);
  text-align: right;
  overflow-wrap: anywhere;
}

.health-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.health-checklist__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-left: 4px solid var(--info);
  border-radius: var(--radius-md);
  background: rgba(8, 12, 18, 0.44);
  padding: 10px 14px;
}

.health-checklist__item[data-severity="Critical"] {
  border-left-color: var(--critical);
}

.health-checklist__item[data-severity="Warning"] {
  border-left-color: var(--warning);
}

.health-checklist__item[data-severity="Critical"] .badge {
  background: rgba(255, 107, 107, 0.13);
  color: var(--critical);
}

.health-checklist__item[data-severity="Warning"] .badge {
  background: rgba(255, 191, 95, 0.13);
  color: var(--warning);
}

.health-checklist__text {
  color: var(--text);
  line-height: 1.45;
}

/* Phase 2: inter-IED communication arc diagram */
.link-button {
  border: 0;
  background: none;
  color: var(--accent);
  padding: 0;
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.health-arc {
  display: grid;
  gap: 12px;
}

.health-arc__empty {
  margin: 0;
  color: var(--muted-2);
}

.health-arc__legend {
  position: absolute;
  top: 8px;
  right: 12px;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  background: rgba(8, 12, 18, 0.7);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
}

.health-arc__order {
  position: absolute;
  top: 44px;
  left: 12px;
  z-index: 2;
  background: rgba(8, 12, 18, 0.7);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.78rem;
  color: var(--muted);
}

.health-arc__order select {
  background: rgba(8, 12, 18, 0.6);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 1px 4px;
  margin-left: 4px;
}

/* Phase 3c: title overlaid in the diagram corner to save vertical space */
.health-map {
  position: relative;
}

.health-viewtabs {
  position: absolute;
  top: 8px;
  left: 12px;
  z-index: 3;
  display: flex;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(8, 12, 18, 0.75);
}

.health-viewtabs button {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 4px 14px;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.health-viewtabs button.health-viewtab--active {
  background: rgba(113, 199, 236, 0.18);
  color: var(--accent-strong);
}

.health-viewtabs button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.health-arc__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  background: transparent;
  border: 0;
  padding: 0;
  font-family: inherit;
  cursor: pointer;
}

/* Item F: dimmed state for a toggled-off service in the clickable legend. */
.health-arc__legend-item--off {
  opacity: 0.4;
}

.health-arc__legend-item--off .health-arc__legend-swatch {
  filter: grayscale(1);
}

.health-arc__legend-swatch {
  width: 14px;
  height: 6px;
  border-radius: 999px;
  display: inline-block;
}

.health-arc__scroller {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: transparent;
}

.health-arc__svg {
  display: block;
  width: 100%;
  height: 800px;
  cursor: grab;
}

.health-arc__svg:active {
  cursor: grabbing;
}

.health-arc__arc {
  transition: opacity 120ms ease;
  cursor: pointer;
}

.health-arc__arc:focus-visible {
  outline: 2px solid var(--accent-strong);
}

.health-arc__node circle {
  fill: var(--accent);
  stroke: var(--code-bg);
  stroke-width: 1.5;
  cursor: pointer;
}

.health-arc__node:hover circle {
  fill: var(--accent-strong);
}

.health-arc__label {
  fill: var(--muted);
  font-size: 11px;
  cursor: pointer;
}

/* Phase 3b: single-line diagram */
.sld-scroller {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: transparent;
}

.sld-toggle {
  position: absolute;
  top: 8px;
  right: 12px;
  z-index: 2;
  display: flex;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(8, 12, 18, 0.7);
}

.sld-toggle button {
  background: transparent;
  color: var(--muted);
  border: 0;
  padding: 3px 12px;
  font: inherit;
  font-size: 0.76rem;
  cursor: pointer;
}

.sld-toggle button.sld-toggle--active {
  background: rgba(113, 199, 236, 0.18);
  color: var(--accent-strong);
  font-weight: 700;
}

.sld-cbr--fill {
  fill: var(--accent);
}

.sld-pivot {
  fill: var(--code-bg);
  stroke: var(--text);
  stroke-width: 1.5;
}

.sld-svg {
  display: block;
  width: 100%;
  height: 800px;
  cursor: grab;
}

.sld-svg:active {
  cursor: grabbing;
}

.sld-sym {
  cursor: pointer;
}

.sld-sym:hover .sld-cbr,
.sld-sym:hover .sld-other {
  stroke: var(--accent-strong);
}

.sld-sym--focus .sld-cbr,
.sld-sym--focus .sld-other,
.sld-sym--focus .sld-blade,
.sld-sym--focus .sld-ct,
.sld-sym--focus .sld-vt {
  stroke: var(--accent-strong);
  stroke-width: 3;
}

.sld-sym--focus {
  animation: sld-focus-pulse 0.8s ease 3;
}

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

.sld-wire {
  stroke: var(--muted);
  stroke-width: 1.6;
}

.sld-busbar {
  stroke: var(--accent-strong);
  stroke-width: 5;
  stroke-linecap: round;
}

.sld-cbr {
  fill: var(--code-bg);
  stroke: var(--text);
  stroke-width: 1.8;
}

.sld-blade {
  stroke: var(--text);
  stroke-width: 1.8;
}

/* Retained: IEC isolator now uses a straight blade (no pivot dot) after item B.
   Kept for potential reuse rather than deleted. */
.sld-dot {
  fill: var(--text);
}

.sld-ct {
  fill: none;
  stroke: var(--info);
  stroke-width: 1.8;
}

.sld-vt {
  fill: none;
  stroke: var(--warning);
  stroke-width: 1.8;
}

.sld-tx {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
}

.sld-other {
  fill: var(--code-bg);
  stroke: var(--muted-2);
  stroke-width: 1.5;
}

.sld-label {
  fill: var(--muted);
  font-size: 11px;
}

.sld-bay-label {
  fill: var(--accent);
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
}

.sld-bus-label {
  fill: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
}

.sld-vl-label {
  fill: var(--muted-2);
  font-size: 12px;
  font-weight: 700;
}

/* Voltage-level bands: faint zoning behind the plant (HV primary vs LV). */
.sld-band--hv {
  fill: rgba(255, 191, 95, 0.06);
}

.sld-band--lv {
  fill: rgba(113, 199, 236, 0.05);
}

/* Item G: IED view. The plant dims as one group; the IED layer fades in and
   becomes interactive only when active (pointer-events flip avoids the hidden
   layer stealing clicks in single-line mode). */
.sld-plant {
  transition: opacity 0.5s ease;
}

.sld-plant--dim {
  opacity: 0.4;
  pointer-events: none;
}

.sld-ied-layer {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.sld-ied-layer--on {
  opacity: 1;
  pointer-events: auto;
}

.sld-ied {
  cursor: pointer;
}

.sld-ied__box {
  fill: rgba(8, 12, 18, 0.92);
  stroke: var(--border-strong);
  stroke-width: 1.5;
}

.sld-ied:hover .sld-ied__box {
  stroke: var(--accent);
}

.sld-ied--unbound .sld-ied__box {
  stroke: #ffbf5f;
}

.sld-ied__role {
  fill: var(--muted);
  font-size: 8px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sld-ied__name {
  fill: var(--text);
  font-size: 12px;
  font-weight: 700;
}

/* Station / bus-level boxes (GW, BBP) stay a touch larger than bay boxes. */
.sld-ied--unbound .sld-ied__role {
  font-size: 9px;
}

.sld-ied--unbound .sld-ied__name {
  font-size: 14px;
}

.sld-ied-link {
  fill: none;
  stroke-width: 2;
}

/* Item G hover focus: highlight the hovered IED, its connected IEDs and their
   connectors; dim everything else. Toggled by JS on mouseenter / mouseleave. */
.sld-ied,
.sld-ied-link {
  transition: opacity 0.2s ease;
}

.sld-ied--faded {
  opacity: 0.15;
}

.sld-ied--related .sld-ied__box {
  stroke: var(--accent);
}

.sld-ied--focus .sld-ied__box {
  stroke: var(--accent-strong);
  stroke-width: 2;
}

.sld-ied-link--faded {
  opacity: 0.08;
}

.sld-ied-link--focus {
  stroke-width: 3.5;
}

/* Item G Phase 1: per-service tokens on each IED box. Live tokens are coloured
   inline by service and clickable; absent services render grayed and inert. */
.sld-ied__token {
  cursor: pointer;
}

.sld-ied__token--off {
  fill: var(--border-strong);
  opacity: 0.45;
  cursor: default;
  pointer-events: none;
}