/* veins — HUD styles
 *
 * Dark, low-contrast chrome that sits over the canvas without competing with
 * the art. All chrome is keyboard-toggleable.
 */

/* MAP-105 / MAP-164 — design tokens.
   This :root block is the static CSS fallback; it mirrors THEMES.default in
   src/themes-config.js and is applied before JS runs.  At runtime,
   applyThemeCss() writes inline-styles to :root that override these values
   when the user switches themes — so to change a token edit THEMES.default
   in themes-config.js AND keep this block in sync.
   --hud-* names are kept as aliases for backward compatibility. */
:root {
  /* Brand */
  --veins-accent:        #7af0d6;
  --veins-accent-soft:   rgba(122, 240, 214, 0.25);
  --veins-accent-glow:   rgba(122, 240, 214, 0.4);
  --veins-bg-deep:       #04040a;        /* scene fallback before WebGL inits */

  /* Chrome surfaces — semi-opaque dark glass over the canvas */
  --chrome-1:            rgba(8, 10, 22, 0.78);   /* default panel bg */
  --chrome-2:            rgba(8, 10, 22, 0.92);   /* modal-strong bg */
  --chrome-3:            rgba(0, 0, 0, 0.4);      /* recessed strip */
  --chrome-border:       rgba(120, 130, 180, 0.18);
  --chrome-rule:         rgba(120, 130, 180, 0.25);

  /* Text */
  --text-primary:        #cfd4ee;
  --text-dim:            #6b6f8c;
  --text-faint:          rgba(120, 130, 180, 0.4);

  /* Type scale — keep tight; the HUD is a monospace surface */
  --text-xs:             10px;
  --text-sm:             11px;
  --text-md:             12px;
  --text-lg:             14px;

  /* Spacing units (4px base) */
  --space-1:             4px;
  --space-2:             6px;
  --space-3:             8px;
  --space-4:             12px;
  --space-5:             16px;
  --space-6:             22px;

  /* Radii */
  --radius-sm:           4px;
  --radius-md:           6px;
  --radius-lg:           8px;

  /* Transitions — paired durations and curves for predictable motion */
  --tx-fast:             120ms ease;
  --tx-mid:              180ms ease;
  --tx-slow:             220ms cubic-bezier(0.22, 0.61, 0.36, 1);

  /* Legacy aliases — existing rules read these names; the new tokens
     supply the actual values. Add new rules using the --veins-/--text-/
     --chrome-/--space- names directly. */
  --hud-fg:              var(--text-primary);
  --hud-fg-dim:          var(--text-dim);
  --hud-bg:              var(--chrome-1);
  --hud-bg-strong:       var(--chrome-2);
  --hud-border:          var(--chrome-border);
  --hud-accent:          var(--veins-accent);
}

/* MAP-105 — high-contrast variant. Swap via document.documentElement
   .classList.add('veins-contrast') for accessibility-mode users. */
html.veins-contrast {
  --text-primary:        #ffffff;
  --text-dim:            #aab0c8;
  --chrome-1:            rgba(0, 0, 0, 0.92);
  --chrome-2:            rgba(0, 0, 0, 0.98);
  --chrome-border:       rgba(180, 190, 220, 0.4);
  --veins-accent:        #aaffe6;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: var(--veins-bg-deep);
  color: var(--hud-fg);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.02em;
  overflow: hidden;
}

#stage {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: grab;
  /* MAP-127 — let pointer events fully own the canvas so the browser
     doesn't intercept touches for native scroll / pinch-to-zoom. The
     camera's own pinch handler needs both fingers to fire pointermove
     events; touch-action: none disables all default touch gestures. */
  touch-action: none;
  /* Disable iOS double-tap zoom + text-callout on long-press — both
     fight the camera's tap / long-press wiring (MAP-130). */
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}
#stage:active { cursor: grabbing; }

#hud-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  transition: opacity var(--tx-mid);
}
#hud-layer.hidden { opacity: 0; }

/* MAP-107 — title as a soft watermark in the top-left. No background
   box; the text fades into the canvas as ambient context rather than a
   labelled badge. Widened letter-spacing + lower opacity than the
   previous 0.78 reads as "the name of this place," not "a UI label." */
.hud-title {
  position: fixed;
  top: 16px;
  left: 18px;
  font-size: var(--text-sm);
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--text-primary);
  opacity: 0.55;
  pointer-events: none;
  /* A tiny accent dot is added before the text via ::before for the
     same visual idiom as the wordmark's node motif. */
}
.hud-title::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--veins-accent);
  margin-right: var(--space-3);
  vertical-align: 1px;
  box-shadow: 0 0 6px var(--veins-accent-glow);
}

.hud-status {
  position: fixed;
  bottom: 14px;
  left: 16px;
  font-size: 11px;
  text-transform: lowercase;
  letter-spacing: 0.06em;
  color: var(--hud-fg-dim);
  pointer-events: none;
}

.hud-attrib {
  position: fixed;
  bottom: 14px;
  right: 16px;
  font-size: 10px;
  text-transform: lowercase;
  color: var(--hud-fg-dim);
  pointer-events: auto;
  letter-spacing: 0.05em;
}
.hud-attrib a {
  color: var(--hud-fg-dim);
  text-decoration: underline dotted var(--text-faint);
  text-underline-offset: 2px;
}
.hud-attrib a:hover { color: var(--hud-fg); }

.hud-topright {
  position: fixed;
  top: 12px;
  right: 14px;
  display: flex;
  gap: 8px;
  align-items: center;
  pointer-events: auto;
}

.hud-tod {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  color: var(--hud-fg-dim);
  padding: 0 6px;
  min-width: 96px;
  text-align: right;
}

/* MAP-107 — pill button. Frosted-glass background with backdrop-filter
   blur so the chrome reads as "painted on top of the canvas" rather
   than "bolted on." No hard border at rest; a subtle inset ring on
   focus + brand-tinted background on hover does the affordance work. */
.hud-btn {
  background: var(--chrome-1);
  -webkit-backdrop-filter: blur(8px) saturate(140%);
  backdrop-filter:         blur(8px) saturate(140%);
  color: var(--text-primary);
  border: 1px solid transparent;     /* reserve layout; recolored on focus */
  border-radius: 999px;
  font: inherit;
  font-size: var(--text-md);
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  pointer-events: auto;
  transition: background var(--tx-fast), color var(--tx-fast), box-shadow var(--tx-fast);
}
.hud-btn:hover {
  background: rgba(122, 240, 214, 0.12);
  color: var(--veins-accent);
  box-shadow: 0 0 12px var(--veins-accent-soft);
}
.hud-btn:focus-visible {
  outline: none;
  border-color: var(--veins-accent);
}
.hud-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.hud-select {
  background: var(--chrome-1);
  -webkit-backdrop-filter: blur(8px) saturate(140%);
  backdrop-filter:         blur(8px) saturate(140%);
  color: var(--text-primary);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: var(--space-1) var(--space-4);
  font: inherit;
  font-size: var(--text-sm);
  pointer-events: auto;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  transition: background var(--tx-fast), border-color var(--tx-fast);
  background-image: linear-gradient(45deg, transparent 50%, var(--text-dim) 50%),
                    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position: calc(100% - 12px) 50%, calc(100% - 7px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 22px;
}
.hud-select:hover {
  background-color: rgba(122, 240, 214, 0.08);
  border-color: var(--veins-accent-soft);
}
.hud-select:focus-visible {
  outline: none;
  border-color: var(--veins-accent);
}

/* Settings drawer (MAP-107 — softer drawer) -------------------------------- */
.hud-panel {
  position: fixed;
  top: var(--space-4);
  right: -360px;
  bottom: var(--space-4);
  width: 320px;
  background: var(--chrome-2);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter:         blur(14px) saturate(140%);
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.35);
  transition: right var(--tx-slow);
  pointer-events: auto;
  display: flex;
  flex-direction: column;
}
.hud-panel.open { right: 0; }

.hud-panel-title {
  font-size: 11px;
  text-transform: lowercase;
  letter-spacing: 0.12em;
  padding: 16px 18px 10px;
  color: var(--hud-fg);
  border-bottom: 1px solid var(--hud-border);
}

.hud-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 6px 14px 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--chrome-rule) transparent;
}
.hud-panel-body::-webkit-scrollbar { width: 6px; }
.hud-panel-body::-webkit-scrollbar-thumb {
  background: var(--chrome-rule);
  border-radius: 3px;
}

.hud-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 4px;
}
.hud-row-label {
  font-size: 11px;
  color: var(--hud-fg-dim);
  text-transform: lowercase;
  flex: 0 0 96px;
}
.hud-input, .hud-range, .hud-check { pointer-events: auto; }
.hud-range {
  flex: 1;
  height: 18px;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}
.hud-range::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--chrome-rule);
}
.hud-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--hud-accent);
  margin-top: -5px;
  box-shadow: 0 0 6px var(--veins-accent-glow);
}
.hud-range::-moz-range-track {
  height: 2px;
  background: var(--chrome-rule);
}
.hud-range::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: none;
  background: var(--hud-accent);
  box-shadow: 0 0 6px var(--veins-accent-glow);
}
.hud-check {
  width: 14px;
  height: 14px;
  accent-color: var(--hud-accent);
}

.hud-input {
  background: rgba(0, 0, 0, 0.4);
  color: var(--hud-fg);
  border: 1px solid var(--hud-border);
  border-radius: 3px;
  padding: 4px 8px;
  font: inherit;
  font-size: 11px;
  flex: 1;
}

.hud-divider {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--hud-fg-dim);
  padding: 14px 4px 4px;
  border-top: 1px solid var(--hud-border);
  margin-top: 12px;
}
.hud-divider:first-of-type { border-top: none; margin-top: 0; }

.hud-note {
  font-size: 10px;
  color: var(--hud-fg-dim);
  padding: 6px 4px 4px;
  font-style: italic;
  line-height: 1.4;
}

.hud-layers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 8px;
  padding: 4px 0;
}
.hud-layer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  text-transform: lowercase;
  color: var(--hud-fg-dim);
  cursor: pointer;
}
.hud-sw {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  flex-shrink: 0;
  box-shadow: 0 0 4px currentColor;
}

/* Help overlay ------------------------------------------------------------- */
.hud-help {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 14, 0.78);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tx-mid);
  z-index: 20;
}
.hud-help.open {
  opacity: 1;
  pointer-events: auto;
}
.hud-help-inner {
  background: var(--hud-bg-strong);
  border: 1px solid var(--hud-border);
  border-radius: 6px;
  padding: 22px 28px;
  min-width: 320px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
.hud-help-title {
  font-size: 11px;
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--hud-accent);
  margin-bottom: 14px;
}
.hud-help table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}
.hud-help td {
  padding: 4px 14px 4px 0;
  vertical-align: top;
  color: var(--hud-fg);
}
.hud-help td:first-child {
  color: var(--hud-accent);
  font-family: ui-monospace, monospace;
  white-space: nowrap;
  width: 70px;
}
.hud-help-hint {
  margin-top: 16px;
  text-align: center;
  font-size: 10px;
  color: var(--hud-fg-dim);
  text-transform: lowercase;
  letter-spacing: 0.1em;
}

/* About / credits overlay --------------------------------------------------
   Reuses .hud-help backdrop + .hud-help-inner card; adds section layout. */
.hud-about-inner { min-width: 300px; max-width: 420px; }
.hud-about-section {
  margin-bottom: 16px;
  font-size: 11px;
  color: var(--hud-fg);
  line-height: 1.5;
}
.hud-about-section a {
  color: var(--hud-fg-dim);
  text-decoration: underline dotted var(--text-faint);
  text-underline-offset: 2px;
}
.hud-about-section a:hover { color: var(--hud-fg); }
.hud-about-section-title {
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.15em;
  color: var(--hud-accent);
  margin-bottom: 7px;
}
.hud-about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hud-attrib-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font: inherit;
  font-size: 10px;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  color: var(--hud-fg-dim);
  text-decoration: underline dotted var(--text-faint);
  text-underline-offset: 2px;
}
.hud-attrib-btn:hover { color: var(--hud-fg); }

/* Splash screen (MAP-106) ---------------------------------------------------
   Full-screen overlay shown from first paint through to city load.
   Uses three CSS-only "transit line" lines drifting in the background
   as a subtle generative preview — no canvas, no WebGL dependency, so
   it appears instantly. main.js adds .done to fade it out once cityData
   resolves; the transition is slow (600 ms) so the dissolve reads as a
   cinematic reveal rather than a snap. */
#veins-splash {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--veins-bg-deep);
  z-index: 100;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 600ms ease;
  overflow: hidden;
}
#veins-splash.done {
  opacity: 0;
  pointer-events: none;
}
.splash-wordmark {
  width: min(420px, 60vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 0 12px var(--veins-accent-soft));
}
.splash-tagline {
  margin-top: var(--space-4);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-sm);
  text-transform: lowercase;
  letter-spacing: 0.24em;
  color: var(--text-dim);
}
.splash-loading {
  margin-top: var(--space-6);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  text-transform: lowercase;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  opacity: 0.6;
  animation: splash-pulse 1.6s ease-in-out infinite;
}
@keyframes splash-pulse {
  0%, 100% { opacity: 0.25; }
  50%      { opacity: 0.65; }
}

/* Ambient background lines — three drifting accent-tinted strokes.
   Each is a thin gradient slice rotated to a different angle, with a
   long-period transform animation. Suggests transit lines without
   committing to a specific city map. */
.splash-net {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.splash-line {
  position: absolute;
  height: 1px;
  width: 140vw;
  left: -20vw;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--veins-accent-soft) 30%,
    var(--veins-accent-soft) 70%,
    transparent 100%);
  opacity: 0.5;
}
.splash-line-1 { top: 30%; transform: rotate(-8deg); animation: splash-drift 18s linear infinite; }
.splash-line-2 { top: 55%; transform: rotate(12deg); animation: splash-drift 24s linear infinite reverse; opacity: 0.35; }
.splash-line-3 { top: 75%; transform: rotate(-3deg); animation: splash-drift 32s linear infinite; opacity: 0.22; }
@keyframes splash-drift {
  from { transform: translateX(-10vw) rotate(var(--rot, -8deg)); }
  to   { transform: translateX( 10vw) rotate(var(--rot, -8deg)); }
}

/* Dev perf overlay (MAP-132) ------------------------------------------------
   Fixed top-left strip showing fps / draw calls / sparks / tiles when
   ?dev=1 or Ctrl+Shift+D is on. Monospace + tabular numbers so the
   digits don't jitter as values change. Sits above the HUD layer so
   it survives ?embed=1 when the dev is debugging an embedded view. */
.veins-perf-overlay {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: rgba(0, 0, 0, 0.6);
  color: var(--text-primary);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-sm);
  z-index: 50;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
}
.veins-perf-overlay .perf-sep { color: var(--text-dim); }
.veins-perf-overlay .perf-fps { color: var(--veins-accent); }

/* Dev tuning panel (MAP-134) ------------------------------------------------
   Top-right slider stack for runtime optimization. Sits below the
   perf overlay but to the right so they don't collide. Same z-index
   tier so they're both visible regardless of HUD state. */
.veins-dev-panel {
  position: fixed;
  top: var(--space-2);
  right: var(--space-2);
  width: 260px;
  padding: var(--space-3) var(--space-4) var(--space-4);
  background: rgba(0, 0, 0, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter:         blur(8px);
  color: var(--text-primary);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-md);
  z-index: 50;
  pointer-events: auto;
}
.dev-panel-title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--veins-accent);
  margin-bottom: var(--space-3);
}
.dev-panel-row {
  display: grid;
  grid-template-columns: 1fr 110px 44px;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}
.dev-panel-label {
  color: var(--text-dim);
  font-size: var(--text-xs);
  text-transform: lowercase;
  letter-spacing: 0.06em;
}
.dev-panel-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  background: var(--chrome-rule);
  border-radius: 1.5px;
  outline: none;
}
.dev-panel-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--veins-accent);
  cursor: grab;
}
.dev-panel-range::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--veins-accent);
  border: none;
  cursor: grab;
}
.dev-panel-range:disabled::-webkit-slider-thumb { background: var(--text-dim); }
.dev-panel-value {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}
.dev-panel-reset {
  margin-top: var(--space-2);
  font-family: inherit;
  font-size: var(--text-xs);
  background: transparent;
  border: 1px solid var(--chrome-border);
  color: var(--text-dim);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-transform: lowercase;
  letter-spacing: 0.1em;
}
.dev-panel-reset:hover {
  color: var(--veins-accent);
  border-color: var(--veins-accent-soft);
}

/* Dev trajectory editor (MAP-133) ------------------------------------------
   Top-right panel, anchored below the optimization panel. Same look
   so they read as one cohesive dev-tools column. */
.veins-dev-trajectory {
  position: fixed;
  top: 280px;             /* roughly below the .veins-dev-panel column */
  right: var(--space-2);
  width: 260px;
  padding: var(--space-3) var(--space-4);
  background: rgba(0, 0, 0, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter:         blur(8px);
  color: var(--text-primary);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-md);
  z-index: 50;
  pointer-events: auto;
}
.dev-traj-row {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
}
.dev-traj-btn {
  flex: 1;
  font-family: inherit;
  font-size: var(--text-xs);
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  cursor: pointer;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  transition: color var(--tx-fast), border-color var(--tx-fast);
}
.dev-traj-btn:hover {
  color: var(--veins-accent);
  border-color: var(--veins-accent-soft);
}
.dev-traj-btn.active {
  color: var(--veins-accent);
  border-color: var(--veins-accent);
  background: var(--veins-accent-soft);
}
.dev-traj-status {
  color: var(--text-dim);
  font-size: var(--text-xs);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Dev layer debugger (MAP-136) ---------------------------------------------
   Compact checklist below the trajectory editor. Per-layer toggles
   mutate renderer.state.<x>Enabled flags. */
.veins-dev-layers {
  position: fixed;
  top: 420px;                 /* below trajectory editor at top: 280 */
  right: var(--space-2);
  width: 160px;
  padding: var(--space-3) var(--space-4);
  background: rgba(0, 0, 0, 0.7);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter:         blur(8px);
  color: var(--text-primary);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  border: 1px solid var(--chrome-border);
  border-radius: var(--radius-md);
  z-index: 50;
  pointer-events: auto;
}
.dev-layer-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-1) 0;
  cursor: pointer;
  color: var(--text-dim);
  text-transform: lowercase;
  letter-spacing: 0.06em;
}
.dev-layer-row input[type="checkbox"] {
  accent-color: var(--veins-accent);
  margin: 0;
}
.dev-layer-row:hover { color: var(--text-primary); }

/* Replay HUD (MAP-144) ------------------------------------------------------
   Bottom-edge strip with speed presets + draggable timeline + HH:MM
   clock. Lives outside the main HUD layer so it survives ?embed=1
   when replay is the whole point of the embed. Hidden when no engine
   is attached (the wrapper just isn't mounted). */
.hud-replay {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--chrome-2);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  backdrop-filter:         blur(10px) saturate(140%);
  border-top: 1px solid var(--chrome-border);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-sm);
  color: var(--text-primary);
  z-index: 25;
  pointer-events: auto;
}
.hud-replay-transport {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.hud-replay-speed,
.hud-replay-play {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: var(--space-1) var(--space-3);
  font: inherit;
  font-size: var(--text-xs);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  transition: color var(--tx-fast), background var(--tx-fast);
}
.hud-replay-speed:hover,
.hud-replay-play:hover {
  color: var(--veins-accent);
  background: rgba(122, 240, 214, 0.08);
}
.hud-replay-speed.active {
  color: var(--veins-accent);
  background: var(--veins-accent-soft);
  border-color: var(--veins-accent-soft);
}
.hud-replay-play {
  margin-left: var(--space-2);
  font-size: var(--text-md);
}
.hud-replay-scrubber-row {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.hud-replay-range {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(
    to right,
    var(--veins-accent) 0%,
    var(--veins-accent) var(--replay-fill, 0%),
    var(--chrome-rule) var(--replay-fill, 0%),
    var(--chrome-rule) 100%
  );
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.hud-replay-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--veins-accent);
  border: 2px solid var(--chrome-2);
  box-shadow: 0 0 8px var(--veins-accent-glow);
  cursor: grab;
}
.hud-replay-range::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--veins-accent);
  border: 2px solid var(--chrome-2);
  box-shadow: 0 0 8px var(--veins-accent-glow);
  cursor: grab;
}
.hud-replay-time {
  min-width: 80px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

/* Stats ticker (MAP-156) ----------------------------------------------------
   Slim fixed strip at the very bottom of the viewport showing live
   aggregate transit stats (city mode) or per-train route status
   (route mode). Hidden by default; 'T' / 'y' toggles. Auto-hides
   when empty (no live feed). */
.hud-ticker {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-1) var(--space-4);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: var(--text-md);
  letter-spacing: 0.04em;
  color: #aaa;
  background: rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter:         blur(8px);
  border-top: 1px solid var(--chrome-border);
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity var(--tx-mid), transform var(--tx-slow);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hud-ticker.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Empty content (no live feed yet) collapses the strip even when
   visible — avoids a black bar with nothing in it. */
.hud-ticker.visible:empty { opacity: 0; }

/* Loading bar (MAP-108) -----------------------------------------------------
   Thin accent-colored line drawing itself across the top edge as
   tiles arrive. Reads as "a transit line completing itself" rather
   than a progress bar. Sits ABOVE the HUD layer so it's visible even
   in ?embed=1 mode — the embedding host still wants the load signal.
   Lives in body (not #hud-layer) for that reason. */
.hud-loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.03);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tx-mid);
  z-index: 30;
}
.hud-loading-bar.visible { opacity: 1; }
.hud-loading-bar.complete { opacity: 1; }
.hud-loading-fill {
  height: 100%;
  width: 0%;
  background: var(--veins-accent);
  box-shadow: 0 0 8px var(--veins-accent-glow);
  /* Faster ease than --tx-mid so the bar feels responsive to each
     incoming tile rather than slowly catching up. */
  transition: width 220ms cubic-bezier(0.22, 0.61, 0.36, 1);
}
.hud-loading-bar.complete .hud-loading-fill {
  width: 100%;
  /* On completion, brighten briefly so the bar reads as "finished"
     before the parent fades. */
  background: var(--veins-accent);
  box-shadow: 0 0 12px var(--veins-accent-glow);
}

/* Routes gallery (MAP-66) ---------------------------------------------------
   Shares the dim-backdrop modal pattern from .hud-help but uses a wider
   panel with a card grid. Cards link directly to #routes/<id> so
   click-through navigates via the existing hashchange handler. */
.hud-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 14, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tx-mid);
  z-index: 20;
}
.hud-overlay.open { opacity: 1; pointer-events: auto; }
.hud-overlay-panel {
  background: var(--hud-bg-strong);
  border: 1px solid var(--hud-border);
  border-radius: 8px;
  padding: 28px 32px;
  min-width: 380px;
  max-width: min(960px, 90vw);
  max-height: 86vh;
  overflow-y: auto;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
.hud-overlay-header { margin-bottom: 20px; }
.hud-overlay-header h2 {
  margin: 0 0 6px 0;
  font-size: 14px;
  text-transform: lowercase;
  letter-spacing: 0.18em;
  color: var(--hud-accent);
  font-weight: 500;
}
.hud-overlay-subtitle {
  font-size: 11px;
  color: var(--hud-fg-dim);
  letter-spacing: 0.04em;
}
.hud-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}
.hud-gallery-empty {
  font-size: 12px;
  color: var(--hud-fg-dim);
  padding: 24px;
  text-align: center;
  font-family: ui-monospace, monospace;
}
.hud-gallery-card {
  display: block;
  background: rgba(10, 14, 28, 0.6);
  border: 1px solid var(--hud-border);
  border-radius: 6px;
  padding: 14px 16px;
  color: var(--hud-fg);
  text-decoration: none;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}
.hud-gallery-card:hover {
  border-color: var(--hud-accent);
  background: rgba(20, 28, 56, 0.7);
  transform: translateY(-2px);
}
.hud-gallery-card.active {
  border-color: var(--hud-accent);
  box-shadow: inset 0 0 0 1px var(--hud-accent);
}
.hud-gallery-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--hud-fg);
  margin-bottom: 3px;
}
.hud-gallery-sub {
  font-size: 11px;
  color: var(--hud-fg-dim);
  margin-bottom: 8px;
}
.hud-gallery-meta {
  font-size: 10px;
  color: var(--hud-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}
.hud-gallery-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.hud-gallery-tag {
  font-size: 9px;
  text-transform: lowercase;
  letter-spacing: 0.05em;
  background: rgba(122, 240, 214, 0.08);
  border: 1px solid var(--veins-accent-soft);
  color: var(--hud-accent);
  padding: 2px 6px;
  border-radius: 10px;
}
.hud-gallery-highlights {
  font-size: 10px;
  color: var(--hud-fg-dim);
  font-style: italic;
}

.hud-fatal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #ff7a90;
  background: rgba(4, 6, 14, 0.92);
  z-index: 1000;
  padding: 24px;
  text-align: center;
}

/* MAP-128 — narrow viewports (phones, embedded iframes, vertical splits).
   The HUD has historically been laid out for 1200px+ desktops; on small
   screens the top-left title + top-right button cluster crowded the
   canvas and the settings drawer at 320px was wider than usable. This
   block tightens chrome dimensions, hides the TOD label (already done
   pre-128), and ensures the slide-in panel takes most of the viewport
   so its contents stay readable. The about / ticker / help overlays
   inherit their own max-width: min(960px, 90vw) which already adapts.
*/
@media (max-width: 600px) {
  .hud-tod { display: none; }
  /* Slide-in panel: full-width-ish so the form controls have breathing
     room. 92vw with right: -92vw means the closed state is fully off
     screen (matches the open: right: 0 transition). */
  .hud-panel { width: 92vw; right: -92vw; }
  /* Top-left title: tighten letter-spacing so longer city names
     ("nyc-metro · 1.3M segs") still fit alongside the dot marker. */
  .hud-title { font-size: 11px; letter-spacing: 0.12em; top: 12px; left: 14px; }
  /* Bottom status: smaller font + tighter padding so it doesn't
     compete with the ticker for a single bottom row. */
  .hud-status { font-size: 10px; bottom: 10px; left: 12px; }
  /* Top-right button cluster: smaller buttons. The HUD chrome assumes
     a hover state to grow; touch has no hover, so we keep them
     compact at all times on narrow viewports. */
  .hud-btn { padding: 6px; }
  .hud-btn svg { width: 16px; height: 16px; }
}

/* Even-narrower portrait phones (< 380px) — extra-compact title + hide
   the bottom status (it's diagnostic; not essential on a phone). */
@media (max-width: 380px) {
  .hud-status { display: none; }
}