/* Explorer (§11). Consumes the tokens in styles.css — defines nothing global.
   Everything below is scoped to .explorer / .gx-* and derives its colours from
   --bg / --accent / --border via color-mix, so a token change propagates here.

   The look: an IDE inspector docked beside a schematic. Mono for anything the
   machine computed (ranks, weights, counts, slider readouts), UI sans for the
   words a human wrote. Hairlines, not boxes. Green only where it means
   "this one". */

.explorer {
  /* Derived palette — all traceable to the base tokens. */
  --gx-panel-bg: color-mix(in srgb, var(--bg-raised) 55%, var(--bg));
  --gx-hair: color-mix(in srgb, var(--border) 62%, transparent);
  --gx-node: color-mix(in srgb, var(--text-dim) 72%, var(--bg));
  --gx-node-stroke: color-mix(in srgb, var(--text-dim) 40%, var(--bg));
  --gx-node-hi: color-mix(in srgb, var(--accent) 42%, var(--text-dim));
  --gx-edge: color-mix(in srgb, var(--text-dim) 38%, transparent);
  --gx-edge-strong: color-mix(in srgb, var(--accent) 45%, var(--text-dim));
  --gx-grid: color-mix(in srgb, var(--text-dim) 26%, transparent);

  display: grid;
  grid-template-columns: 1fr;
  min-height: 0;
  isolation: isolate;
}

/* The shell's .main is prose-width; this one surface opts out of that. */
.main:has(.explorer) {
  --gx-topbar: 3.4rem;
  max-width: none;
  padding: 0;
}

/* ===========================================================================
   Panel — the text surface. First in the DOM, first in tab order.
   =========================================================================== */

.gx-panel {
  background: var(--gx-panel-bg);
  border-bottom: 1px solid var(--border);
  min-width: 0;
}

.gx-panel-inner {
  display: flex;
  flex-direction: column;
}

.gx-sec {
  padding: 1rem 1.15rem;
  border-top: 1px solid var(--gx-hair);
}

.gx-sec:first-child {
  border-top: 0;
}

.gx-h2 {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.gx-count {
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--text-dim) 70%, var(--bg));
}

.gx-note {
  margin: 0.7rem 0 0;
  font-size: 0.74rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--text-dim) 80%, var(--bg));
}

.gx-vh {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---- in-graph filter ---- */

.gx-filter > .gx-h2 {
  display: block;
}

.gx-searchwrap {
  position: relative;
  display: flex;
  align-items: center;
}

.gx-search {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.42rem 3.6rem 0.42rem 0.65rem;
}

.gx-search::placeholder {
  color: color-mix(in srgb, var(--text-dim) 70%, var(--bg));
}

.gx-search:focus {
  outline: none;
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.gx-searchcount {
  position: absolute;
  right: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  pointer-events: none;
}

/* ---- inspector ---- */

.gx-eyebrow {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 72%, var(--text-dim));
}

.gx-title {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.gx-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.gx-dot-sep {
  padding: 0 0.45rem;
  opacity: 0.55;
}

.gx-flag {
  color: color-mix(in srgb, var(--accent) 80%, var(--text-dim));
}

.gx-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0.6rem 0 0;
}

.gx-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1;
  padding: 0.26rem 0.45rem;
  border: 1px solid var(--gx-hair);
  border-radius: 4px;
  color: var(--text-dim);
}

.gx-tag::before {
  content: '#';
  opacity: 0.5;
}

.gx-tag:hover {
  border-color: var(--accent-dim);
  color: var(--accent);
  text-decoration: none;
}

.gx-summary {
  margin: 0.7rem 0 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--text) 82%, var(--bg));
}

.gx-actions {
  margin: 0.85rem 0 0;
}

.gx-open {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.gx-open span {
  display: inline-block;
  transition: transform 0.18s ease;
}

.gx-open:hover span {
  transform: translateX(3px);
}

/* ---- neighbor list: the required text equivalent (§11) ---- */

.gx-nlist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.gx-nrow {
  border-top: 1px solid var(--gx-hair);
}

.gx-nrow:first-child {
  border-top: 0;
}

.gx-nlink {
  display: grid;
  grid-template-columns: 1.65rem minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: 0.55rem;
  row-gap: 0.3rem;
  padding: 0.55rem 0.45rem 0.6rem 0.35rem;
  margin-left: -0.35rem;
  border-left: 2px solid transparent;
  color: var(--text);
  transition: background 0.14s ease, border-color 0.14s ease;
}

.gx-nlink:hover,
.gx-nlink:focus-visible {
  background: var(--bg-hover);
  border-left-color: var(--accent);
  text-decoration: none;
}

.gx-nrank {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--text-dim) 65%, var(--bg));
}

.gx-ntitle {
  font-size: 0.89rem;
  line-height: 1.35;
  min-width: 0;
}

.gx-nlink:hover .gx-ntitle {
  color: var(--accent);
}

.gx-nvalue {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--accent) 85%, var(--text-dim));
}

.gx-nmeter {
  grid-column: 2;
  align-self: center;
  height: 3px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--border) 85%, transparent);
  overflow: hidden;
}

.gx-nmeter > i {
  display: block;
  height: 100%;
  width: var(--v, 0%);
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
}

.gx-nnote {
  grid-column: 3;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--text-dim) 72%, var(--bg));
}

/* ---- legend ---- */

.gx-legend {
  display: grid;
  grid-template-columns: 1.7rem 1fr;
  align-items: center;
  gap: 0.5rem 0.55rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.76rem;
  color: color-mix(in srgb, var(--text) 78%, var(--bg));
}

.gx-legend li {
  display: contents;
}

.gx-sw {
  justify-self: center;
  width: 1.7rem;
  height: 0.85rem;
  position: relative;
}

.gx-sw::before {
  content: '';
  position: absolute;
  inset: 0;
}

.gx-sw--focus::before,
.gx-sw--node::before,
.gx-sw--script::before {
  inset: 50% auto auto 50%;
  width: 0.6rem;
  height: 0.6rem;
  translate: -50% -50%;
  border-radius: 50%;
}

.gx-sw--focus::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}

.gx-sw--node::before {
  background: var(--gx-node);
  border: 1px solid var(--gx-node-stroke);
}

.gx-sw--script::before {
  background: var(--gx-node);
}

.gx-sw--script::after {
  content: '';
  position: absolute;
  inset: 50% auto auto 50%;
  width: 1rem;
  height: 1rem;
  translate: -50% -50%;
  border-radius: 50%;
  border: 1px dashed color-mix(in srgb, var(--accent) 55%, transparent);
}

.gx-sw--manual::before,
.gx-sw--strong::before,
.gx-sw--weak::before {
  inset: 50% 0 auto 0;
  height: 0;
}

.gx-sw--manual::before {
  border-top: 2px dashed var(--accent);
}

.gx-sw--strong::before {
  border-top: 2px solid var(--gx-edge-strong);
}

.gx-sw--weak::before {
  border-top: 1px solid var(--gx-edge);
}

/* ---- physics ---- */

.gx-physics > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
}

.gx-physics > summary::-webkit-details-marker {
  display: none;
}

.gx-physics > summary .gx-h2 {
  margin: 0;
}

.gx-physics > summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1;
  color: var(--text-dim);
}

.gx-physics[open] > summary::after {
  content: '–';
}

.gx-physics[open] > summary .gx-h2 {
  color: var(--text);
}

.gx-sliders {
  display: grid;
  gap: 0.7rem;
  margin: 0.9rem 0 0.9rem;
}

.gx-slider label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.76rem;
  color: var(--text-dim);
  cursor: pointer;
}

.gx-out {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.gx-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 1rem;
  margin: 0.15rem 0 0;
  background: transparent;
  cursor: ew-resize;
}

.gx-range::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 2px;
  background: var(--border);
}

.gx-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 14px;
  margin-top: -6px;
  border: 0;
  border-radius: 2px;
  background: var(--accent);
}

.gx-range::-moz-range-track {
  height: 2px;
  border-radius: 2px;
  background: var(--border);
}

.gx-range::-moz-range-thumb {
  width: 10px;
  height: 14px;
  border: 0;
  border-radius: 2px;
  background: var(--accent);
}

.gx-range:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}

.gx-range:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ---- buttons ---- */

.gx-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1;
  padding: 0.4rem 0.6rem;
  color: var(--text-dim);
  background: color-mix(in srgb, var(--bg-raised) 86%, transparent);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.14s ease, border-color 0.14s ease;
}

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

.gx-btn--wide {
  width: 100%;
  padding: 0.5rem;
}

.gx-btn--icon {
  width: 1.75rem;
  padding: 0.4rem 0;
  text-align: center;
}

/* ===========================================================================
   Panel view switch — two server-rendered modes, one segmented control.
   The control itself is the shared .seg / .seg-item pair from styles.css; only
   the bar it sits in belongs to the explorer. Full-width, because this is a
   mode switch (an editor's sidebar tabs), not a filter.
   =========================================================================== */

.gx-viewbar {
  display: flex;
  align-items: center;
  padding: 0.62rem 1.15rem;
  background: var(--gx-panel-bg);
}

.gx-viewbar .seg {
  flex: 1 1 auto;
}

.gx-viewbar .seg-item {
  flex: 1 1 0;
  padding-block: 0.34rem;
  letter-spacing: 0.08em;
  text-align: center;
}

/* ===========================================================================
   Files view — the corpus as it exists on disk: one folder per post bundle,
   its entry document, and every R2 asset served at /<slug>/<file>.

   Folders are native <details>. Disclosure, keyboard operation and no-JS
   behaviour come from the platform, so there is no ARIA tree role here and no
   roving tabindex to keep in sync with a script that may never run (§11).
   =========================================================================== */

.gx-files {
  /* File-type dots reuse the code-token palette already shipped in styles.css,
     so a file reads the same colour here as its syntax does in a post. */
  --gx-f-doc: var(--hl-attr);
  --gx-f-markup: var(--hl-variable);
  --gx-f-script: var(--hl-number);
  --gx-f-style: var(--hl-function);
  --gx-f-data: var(--hl-meta);
  --gx-f-image: var(--hl-keyword);
  --gx-f-media: var(--hl-type);
  --gx-f-font: var(--hl-string);
  --gx-f-archive: var(--hl-operator);
  --gx-f-other: color-mix(in srgb, var(--text-dim) 78%, var(--bg));
}

.gx-files .gx-count {
  white-space: nowrap;
}

.gx-tree {
  margin: 0.1rem 0 0.2rem;
}

.gx-fold {
  border-top: 1px solid color-mix(in srgb, var(--gx-hair) 55%, transparent);
}

.gx-fold:first-child {
  border-top: 0;
}

.gx-fsum {
  display: flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.4rem 0.45rem 0.4rem 0.4rem;
  margin-left: -0.35rem;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-dim);
  cursor: pointer;
  list-style: none;
  transition: background 0.14s ease, border-color 0.14s ease, color 0.14s ease;
}

.gx-fsum::-webkit-details-marker {
  display: none;
}

/* Disclosure chevron, drawn rather than typed: no glyph-metric surprises. */
.gx-fsum::before {
  content: '';
  flex: none;
  width: 0;
  height: 0;
  border-left: 4px solid currentColor;
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
  opacity: 0.7;
  transition: rotate 0.18s var(--ease);
}

.gx-fold[open] > .gx-fsum::before {
  rotate: 90deg;
  opacity: 1;
}

.gx-fsum:hover {
  background: var(--bg-hover);
  border-left-color: var(--accent-dim);
  color: var(--text);
}

.gx-fsum:focus-visible {
  outline-offset: -2px;
}

.gx-fslug {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-soft);
}

.gx-fold[open] > .gx-fsum .gx-fslug {
  color: var(--text);
}

.gx-fsep {
  color: var(--accent);
  opacity: 0.65;
}

.gx-fnum {
  margin-left: auto;
  padding-left: 0.5rem;
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--text-dim) 62%, var(--bg));
}

/* The ?focus= post. Styled off the ARIA state so the highlight and the
   announcement can never drift apart. */
.gx-fsum[aria-current] {
  border-left-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  color: var(--text);
}

.gx-fsum[aria-current] .gx-fslug {
  color: var(--accent);
}

.gx-flist {
  list-style: none;
  margin: 0 0 0.3rem 0.34rem;
  padding: 0;
  border-left: 1px solid var(--gx-hair);
}

.gx-flink {
  display: flex;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.25rem 0.45rem 0.25rem 0.62rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 0.745rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--text) 74%, var(--bg));
  transition: background 0.14s ease, border-color 0.14s ease, color 0.14s ease;
}

/* Hover lights the row's own rail, replacing the tree rail segment behind it. */
.gx-flink:hover,
.gx-flink:focus-visible {
  background: var(--bg-hover);
  border-left-color: var(--accent);
  color: var(--text);
  text-decoration: none;
}

.gx-flink:focus-visible {
  outline-offset: -2px;
}

.gx-flink.is-primary {
  color: var(--text);
}

.gx-fdot {
  flex: none;
  align-self: center;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 2px;
  background: var(--gx-f-other);
  opacity: 0.85;
}

.gx-flink:hover .gx-fdot {
  opacity: 1;
}

.gx-fdot[data-kind='doc'] {
  background: var(--gx-f-doc);
}

.gx-fdot[data-kind='markup'] {
  background: var(--gx-f-markup);
}

.gx-fdot[data-kind='script'] {
  background: var(--gx-f-script);
}

.gx-fdot[data-kind='style'] {
  background: var(--gx-f-style);
}

.gx-fdot[data-kind='data'] {
  background: var(--gx-f-data);
}

.gx-fdot[data-kind='image'] {
  background: var(--gx-f-image);
}

.gx-fdot[data-kind='media'] {
  background: var(--gx-f-media);
}

.gx-fdot[data-kind='font'] {
  background: var(--gx-f-font);
}

.gx-fdot[data-kind='archive'] {
  background: var(--gx-f-archive);
}

.gx-fname {
  flex: 0 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gx-fentry {
  flex: none;
  font-size: 0.6rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
}

.gx-fentry::before {
  content: '←';
  margin-right: 0.2rem;
  opacity: 0.7;
}

.gx-fsize {
  flex: none;
  margin-left: auto;
  padding-left: 0.5rem;
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--text-dim) 62%, var(--bg));
}

.gx-files code {
  font-family: var(--font-mono);
  font-size: 0.94em;
}

/* Progressive polish: browsers that can animate a disclosure do; the rest open
   instantly, which is what <details> has always done. */
@supports selector(::details-content) {
  .gx-tree {
    interpolate-size: allow-keywords;
  }

  .gx-fold::details-content {
    block-size: 0;
    overflow: hidden;
    transition: content-visibility 0.22s allow-discrete, block-size 0.22s var(--ease);
  }

  .gx-fold[open]::details-content {
    block-size: auto;
  }
}

/* ===========================================================================
   Stage — canvas + HUD
   =========================================================================== */

.gx-stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  height: clamp(19rem, 55vh, 32rem);
}

.gx-canvas {
  --gx-k: 1;
  --gx-tx: 0px;
  --gx-ty: 0px;
  position: absolute;
  inset: 0;
  background-color: var(--bg);
  background-image: radial-gradient(circle at 1px 1px, var(--gx-grid) 1px, transparent 0);
  background-size: calc(30px * var(--gx-k)) calc(30px * var(--gx-k));
  background-position: var(--gx-tx) var(--gx-ty);
}

/* depth: the graph sits in a well, not on a sheet */
.gx-stage::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 90% 80% at 50% 45%, transparent 40%, color-mix(in srgb, var(--bg) 88%, transparent) 100%);
}

.gx-hud {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.gx-hud--tl {
  top: 0.7rem;
  left: 0.7rem;
}

.gx-hud--br {
  right: 0.7rem;
  bottom: 0.7rem;
}

.gx-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1;
  padding: 0.42rem 0.55rem;
  color: var(--text-dim);
  background: color-mix(in srgb, var(--bg-raised) 78%, transparent);
  border: 1px solid var(--gx-hair);
  border-radius: 6px;
  backdrop-filter: blur(8px);
  font-variant-numeric: tabular-nums;
}

.gx-chip--zoom {
  min-width: 3.4rem;
  text-align: center;
}

/* ---- empty / error state ---- */

.gx-empty {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 0.5rem;
  padding: 2rem;
  text-align: center;
}

.gx-empty p {
  margin: 0;
  max-width: 30rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-dim);
}

.gx-empty .gx-empty-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--accent) 60%, var(--text-dim));
}

/* ===========================================================================
   SVG graph
   =========================================================================== */

.gx-svg {
  display: block;
  width: 100%;
  height: 100%;
  /* Mobile: the page must still scroll past the canvas (§16 — the list is the
     primary surface here). Desktop takes full pointer control below. */
  touch-action: pan-y;
  cursor: grab;
  -webkit-tap-highlight-color: transparent;
}

.gx-svg.is-panning {
  cursor: grabbing;
}

.gx-viewport.is-gliding {
  transition: transform 0.42s cubic-bezier(0.22, 0.8, 0.3, 1);
}

.gx-edges {
  animation: gx-fade 0.7s 0.3s both ease-out;
}

.gx-edge {
  stroke: var(--gx-edge);
  fill: none;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  transition: opacity 0.22s ease, stroke 0.22s ease;
}

.gx-edge.is-strong {
  stroke: var(--gx-edge-strong);
}

.gx-edge.is-manual {
  stroke: color-mix(in srgb, var(--accent) 80%, var(--text-dim));
  stroke-dasharray: 5 4;
}

/* Opacity only — the `transform` attribute on this <g> carries the simulation
   position, and a CSS `transform` here would silently override it. */
.gx-node {
  cursor: pointer;
  animation: gx-fade 0.5s both ease-out;
  transition: opacity 0.22s ease;
}

.gx-dot {
  fill: var(--gx-node);
  stroke: var(--gx-node-stroke);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transition: fill 0.2s ease, stroke 0.2s ease;
}

.gx-hit {
  fill: transparent;
  stroke: none;
}

.gx-ring {
  fill: none;
  stroke: color-mix(in srgb, var(--accent) 42%, transparent);
  stroke-width: 1;
  stroke-dasharray: 2 3;
  vector-effect: non-scaling-stroke;
}

.gx-halo {
  fill: var(--accent);
  opacity: 0.13;
  pointer-events: none;
  animation: gx-breathe 3.4s ease-in-out infinite;
}

/* Labels live inside the zoomed <g>, so they are counter-scaled by the live
   zoom factor the client publishes as --gx-k. Constant on screen, no per-node
   JS on every wheel event. */
.gx-nodelabel {
  font-family: var(--font-mono);
  font-size: calc(9.5px / var(--gx-k, 1));
  fill: var(--text);
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: calc(3.5px / var(--gx-k, 1));
  stroke-linejoin: round;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease;
}

.gx-svg.show-labels .gx-nodelabel,
.gx-node.is-hovered .gx-nodelabel,
.gx-node.is-selected .gx-nodelabel,
.gx-node.is-neighbor .gx-nodelabel,
.gx-node.is-match .gx-nodelabel {
  opacity: 1;
}

.gx-node.is-hovered .gx-dot,
.gx-node.is-neighbor .gx-dot {
  fill: var(--gx-node-hi);
  stroke: color-mix(in srgb, var(--accent) 55%, transparent);
}

.gx-node.is-selected .gx-dot {
  fill: var(--accent);
  stroke: var(--accent);
}

.gx-node.is-selected .gx-nodelabel {
  fill: var(--accent);
}

.gx-node.is-dragging {
  cursor: grabbing;
}

/* progressive subgraph: near stays lit, far recedes but never disappears */
.gx-svg.is-focusing .gx-node[data-depth='2'] {
  opacity: 0.4;
}

.gx-svg.is-focusing .gx-node[data-depth='3'] {
  opacity: 0.13;
}

.gx-svg.is-focusing .gx-edge[data-depth='2'] {
  opacity: 0.3;
}

.gx-svg.is-focusing .gx-edge[data-depth='3'] {
  opacity: 0.07;
}

.gx-svg.is-focusing .gx-edge.is-active {
  stroke: var(--accent);
  opacity: 1;
}

/* search dimming wins over focus dimming */
.gx-svg.is-searching .gx-node,
.gx-svg.is-searching.is-focusing .gx-node {
  opacity: 0.1;
}

.gx-svg.is-searching .gx-edge {
  opacity: 0.05;
}

.gx-svg.is-searching .gx-node.is-match,
.gx-svg.is-searching.is-focusing .gx-node.is-match {
  opacity: 1;
}

.gx-svg.is-searching .gx-node.is-match .gx-dot {
  fill: var(--warn);
  stroke: var(--warn);
}

@keyframes gx-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes gx-breathe {
  0%,
  100% {
    opacity: 0.1;
  }
  50% {
    opacity: 0.2;
  }
}

/* ===========================================================================
   Desktop: two panels, one viewport-height surface.
   Mobile keeps the stacked default above — panel first, canvas second (§16).
   =========================================================================== */

@media (min-width: 62rem) {
  .main:has(.explorer) {
    height: calc(100dvh - var(--gx-topbar, 3.4rem));
    min-height: 34rem;
    overflow: hidden;
  }

  .explorer {
    grid-template-columns: minmax(20rem, 23rem) minmax(0, 1fr);
    height: 100%;
  }

  .gx-panel {
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-bottom: 0;
    border-right: 1px solid var(--border);
  }

  .gx-panel-inner {
    padding-bottom: 2rem;
  }

  /* The mode switch stays put while the panel scrolls — an editor's tab strip.
     It owns the hairline under itself once it can overlap the content. */
  .gx-viewbar {
    position: sticky;
    top: 0;
    z-index: 3;
    background: color-mix(in srgb, var(--gx-panel-bg) 88%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gx-hair);
  }

  .gx-viewbar + .gx-sec {
    border-top: 0;
  }

  .gx-stage {
    height: auto;
    min-height: 0;
  }

  .gx-svg {
    touch-action: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .gx-node,
  .gx-edges,
  .gx-halo {
    animation: none !important;
  }

  .gx-viewport.is-gliding,
  .gx-nlink,
  .gx-open span,
  .gx-edge,
  .gx-dot,
  .gx-nodelabel,
  .gx-fsum,
  .gx-fsum::before,
  .gx-flink,
  .gx-fold::details-content {
    transition: none !important;
  }
}