/* ─────────────────────────────────────────────────────────────────────
   FheForge — design tokens (v4)
   Editorial warm-paper, with a near-mirror dark theme.
   ───────────────────────────────────────────────────────────────────── */

:root,
:root[data-theme="light"] {
  /* Surfaces — warm paper */
  --paper:        oklch(96.8% 0.008 75);
  --paper-2:      oklch(94.4% 0.010 75);
  --paper-3:      oklch(92.0% 0.012 75);
  --ink:          oklch(18.0% 0.015 55);
  --ink-2:        oklch(32.0% 0.014 55);
  --muted:        oklch(48.0% 0.014 55);
  --muted-2:      oklch(62.0% 0.012 55);
  --hairline:     oklch(86.0% 0.010 70);
  --hairline-2:   oklch(80.0% 0.014 70);

  /* Signal */
  --accent:       oklch(70.0% 0.135 72);
  --accent-ink:   oklch(38.0% 0.110 60);
  --accent-soft:  oklch(92.0% 0.045 80);

  /* Status */
  --positive:     oklch(54.0% 0.095 150);
  --positive-soft: oklch(91.0% 0.035 150);
  --danger:       oklch(52.0% 0.165 28);
  --danger-soft:  oklch(91.0% 0.040 30);

  --cipher-haze:  oklch(70.0% 0.020 70);
  --grain-rgba:   rgba(74, 55, 30, .012);
}

:root[data-theme="dark"] {
  --paper:        oklch(15.0% 0.014 60);
  --paper-2:      oklch(19.0% 0.014 60);
  --paper-3:      oklch(22.5% 0.014 60);
  --ink:          oklch(94.0% 0.010 80);
  --ink-2:        oklch(82.0% 0.012 80);
  --muted:        oklch(64.0% 0.012 75);
  --muted-2:      oklch(50.0% 0.012 75);
  --hairline:     oklch(30.0% 0.014 60);
  --hairline-2:   oklch(38.0% 0.014 60);

  --accent:       oklch(76.0% 0.135 72);
  --accent-ink:   oklch(86.0% 0.110 75);
  --accent-soft:  oklch(28.0% 0.060 70);

  --positive:     oklch(72.0% 0.110 150);
  --positive-soft: oklch(28.0% 0.050 150);
  --danger:       oklch(70.0% 0.165 28);
  --danger-soft:  oklch(28.0% 0.080 30);

  --cipher-haze:  oklch(55.0% 0.020 70);
  --grain-rgba:   rgba(255, 240, 220, .012);
}

:root {
  /* Type */
  --serif:  "Newsreader", "Times New Roman", Georgia, serif;
  --display:"Instrument Serif", "Newsreader", Georgia, serif;
  --sans:   "Public Sans", -apple-system, system-ui, sans-serif;
  --mono:   "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* Motion budget */
  --ease:      cubic-bezier(.22,.61,.36,1);
  --ease-out:  cubic-bezier(.18,.89,.32,1);
  --t-feedback: 120ms;  /* hover, micro */
  --t-state:    200ms;  /* state change crossfade */
  --t-enter:    400ms;  /* mount-in */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--paper); }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11", "tnum";
  transition: background-color var(--t-state) var(--ease), color var(--t-state) var(--ease);
}

/* Paper grain — barely-there noise */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    repeating-linear-gradient(0deg,   var(--grain-rgba) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg,  var(--grain-rgba) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply;
  opacity: .6;
}
body.no-grain::before { display: none; }

/* ─── Type ─── */
h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.011em; }
.display { font-family: var(--display); font-weight: 400; letter-spacing: -0.022em; line-height: 1.1; }
.display em { font-style: italic; font-feature-settings: "ss01"; }
.sectionhead-title {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -0.020em;
  line-height: 1.18;
  margin: 0;
  padding: 0;
  display: block;
}
.sectionhead-title em { font-style: italic; }
.serif { font-family: var(--serif); }
.mono { font-family: var(--mono); font-feature-settings: "ss02","cv01","cv11","zero","tnum"; }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
.idx { font-family: var(--mono); font-weight: 500; color: var(--muted); font-variant-numeric: tabular-nums; }
.tnum { font-variant-numeric: tabular-nums; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { color: inherit; }
hr.rule   { border: 0; border-top: 1px solid var(--hairline); margin: 0; }
hr.dashed { border: 0; border-top: 1px dashed var(--hairline-2); margin: 0; }

/* ─── Layout primitives ─── */
.section { position: relative; border-top: 1px solid var(--hairline); padding: 40px 0; }
.section:first-child { border-top: 0; }
.shell { width: 100%; max-width: 1480px; margin: 0 auto; padding: 0 28px; position: relative; z-index: 1; }

/* ─── Topbar ─── */
.topbar {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in oklch, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.topbar-inner {
  display: flex; align-items: center; gap: 18px;
  height: 56px;
  padding: 0 24px;
}
.wordmark {
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: -0.02em;
  display: inline-flex; align-items: baseline; gap: 8px;
  cursor: pointer;
}
.wordmark .dot {
  width: 8px; height: 8px;
  background: var(--accent);
  display: inline-block;
  transform: translateY(-2px);
}

/* ─── Master-detail shell ─── */
.md-frame {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1px;
  background: var(--hairline);
  border-top: 1px solid var(--hairline);
  height: calc(100vh - 56px);
  overflow: hidden;
  position: relative;
  transition: grid-template-columns 320ms var(--ease-out);
}
.md-frame.md-list-closed { grid-template-columns: 0 minmax(0, 1fr); }
.md-frame.md-list-closed .md-list { overflow: hidden; opacity: 0; pointer-events: none; }
.md-list { transition: opacity 200ms var(--ease); }
.md-rail-toggle {
  position: absolute;
  top: 20px;
  left: 320px;
  z-index: 10;
  width: 24px; height: 36px;
  border: 1px solid var(--hairline);
  border-left: 0;
  background: var(--paper);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  transition: left 320ms var(--ease-out), background-color var(--t-feedback) var(--ease), color var(--t-feedback) var(--ease);
}
.md-rail-toggle:hover { background: var(--paper-2); color: var(--ink); }
.md-frame.md-list-closed .md-rail-toggle { left: 0; }
.md-list {
  background: var(--paper);
  display: flex; flex-direction: column;
  min-height: 0;
}
.md-list-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
  background: var(--paper);
  display: flex; flex-direction: column; gap: 8px;
}
.md-list-body {
  flex: 1; min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}
.md-detail {
  background: var(--paper);
  display: flex; flex-direction: column;
  min-height: 0;
}
.md-detail-header {
  padding: 16px 28px;
  border-bottom: 1px solid var(--hairline);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  flex-wrap: wrap;
}
.md-detail-body {
  flex: 1; min-height: 0;
  overflow-y: auto;
  padding: 28px;
}
.md-item {
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 20px;
  border: 0;
  border-bottom: 1px dashed var(--hairline-2);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--t-feedback) var(--ease);
  color: var(--ink);
}
.md-item:hover { background: var(--paper-2); }
.md-item.selected {
  background: var(--paper-2);
  box-shadow: inset 3px 0 0 0 var(--ink);
}
.md-group {
  padding: 14px 20px 6px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: var(--paper-2);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px dashed var(--hairline-2);
}
.md-group:first-child { border-top: 0; }

/* ─── Chips ─── */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--hairline);
  padding: 5px 9px;
  background: var(--paper);
  color: var(--ink-2);
  transition: background-color var(--t-feedback) var(--ease), border-color var(--t-feedback) var(--ease);
}
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--positive); display: inline-block; }
.chip.warn .dot { background: var(--accent); }
.chip.bad  .dot { background: var(--danger); }
.chip.live .dot { animation: pulseDot 1.6s ease-out infinite; }
@keyframes pulseDot {
  0%   { box-shadow: 0 0 0 0 color-mix(in oklch, var(--positive) 60%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  padding: 11px 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  white-space: nowrap;
  transition: transform var(--t-feedback) var(--ease), background-color var(--t-feedback) var(--ease), color var(--t-feedback) var(--ease), border-color var(--t-feedback) var(--ease);
}
.btn:hover:not(:disabled) { background: color-mix(in oklch, var(--ink) 84%, var(--accent)); transform: scale(1.01); }
.btn:active:not(:disabled) { transform: translateY(1px) scale(0.99); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover:not(:disabled) { background: var(--paper-2); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn.accent:hover:not(:disabled) { background: color-mix(in oklch, var(--accent) 88%, var(--ink)); color: var(--paper); }
.btn.sm { padding: 7px 12px; font-size: 13px; }
.btn.lg { padding: 14px 22px; font-size: 15px; }
.btn .ar { font-family: var(--mono); font-weight: 400; }

/* Outline ring for focus / select */
.btn:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ─── Cards / data blocks ─── */
.block {
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 22px;
  position: relative;
  transition: border-color var(--t-feedback) var(--ease), transform var(--t-feedback) var(--ease);
}
.block.hover:hover { border-color: var(--muted); transform: translateY(-1px); }
.block .corner-idx {
  position: absolute; top: 10px; right: 12px;
  font-family: var(--mono); font-size: 10px; color: var(--muted);
  letter-spacing: 0.12em;
}
.kv {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 16px;
  padding: 8px 0;
  border-top: 1px dashed var(--hairline-2);
}
.kv:first-child { border-top: 0; }
.kv .k {
  font-size: 12px; color: var(--muted);
  font-family: var(--mono); letter-spacing: 0.04em; text-transform: uppercase;
  flex: 0 0 auto;
}
.kv .v {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

/* ─── Cipher ─── */
.cipher {
  display: inline-flex; align-items: baseline;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  position: relative;
  white-space: nowrap;
}
.cipher .plain {
  transition: filter 1.1s var(--ease), letter-spacing 1.1s var(--ease), color 1.1s var(--ease);
  transition-delay: var(--cipher-delay, 0ms);
}
.cipher.locked .plain {
  filter: blur(6.5px) saturate(.4);
  letter-spacing: 0.02em;
  color: var(--cipher-haze);
  user-select: none;
}
.cipher .lock-mark {
  margin-left: 8px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 1;
  transition: opacity .35s var(--ease);
}
.cipher.unlocked .lock-mark { opacity: 0; }

/* Cipher containers fit large values to their card width */
.block, .md-detail-body > div, .permit-stage > div { container-type: inline-size; }
.cipher.cipher-fit {
  max-width: 100%;
  overflow: hidden;
}
.cipher.cipher-fit .plain {
  min-width: 0;
  display: inline-flex; align-items: baseline; gap: 4px;
}
.hatched {
  background-image: repeating-linear-gradient(
    45deg,
    transparent 0 6px,
    color-mix(in oklch, var(--ink) 7%, transparent) 6px 7px
  );
}

/* ─── LTV gauge / meter ─── */
.meter {
  height: 8px;
  background: var(--paper-2);
  border: 1px solid var(--hairline);
  position: relative;
  overflow: hidden;
}
.meter .fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: var(--ink);
  transition: width .8s var(--ease);
}
.meter .tick {
  position: absolute; top: -3px; bottom: -3px;
  width: 1px; background: var(--ink-2);
}
.meter .tick.danger { background: var(--danger); }

/* ─── Builder canvas + nodes (smaller, layered edges) ─── */
.canvas {
  position: relative;
  background:
    radial-gradient(circle, color-mix(in oklch, var(--ink) 9%, transparent) 1px, transparent 1.4px) 0 0/18px 18px,
    var(--paper);
  border: 1px solid var(--hairline);
  overflow: hidden;
  overscroll-behavior: contain;
  touch-action: none;
}
.canvas { cursor: default; }
.canvas.hand-tool { cursor: grab; }
.canvas.hand-tool:active { cursor: grabbing; }

/* Three SVG layers: edges below, edges-active in middle, ports on top */
.canvas-edges {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1;
}
.canvas-edges path.edge-halo {
  stroke: var(--paper);
  stroke-width: 5;
  fill: none;
}
/* Builder: edge selection + idle flow animation + cycle styling */
.canvas-edges path.edge-hit {
  stroke: transparent;
  stroke-width: 16;
  fill: none;
  cursor: pointer;
  pointer-events: stroke;
}
.canvas-edges path.edge-stroke {
  stroke: var(--ink);
  stroke-width: 1.8;
  fill: none;
  transition: stroke var(--t-feedback) var(--ease), stroke-width var(--t-feedback) var(--ease);
}
.canvas-edges path.edge-stroke.active { stroke: var(--accent-ink); stroke-width: 2.2; }
.canvas-edges path.edge-stroke.selected { stroke: var(--accent-ink); stroke-width: 2.4; }
.canvas-edges path.edge-stroke.idle {
  stroke-dasharray: 1 7;
  animation: edgeIdleFlow 12s linear infinite;
}
.canvas-edges path.edge-stroke.sev-error {
  stroke: var(--accent-ink);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  animation: edgeErrorFlow 1.8s linear infinite;
}
.canvas-edges path.edge-stroke.sev-warn {
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-dasharray: 4 4;
}
.canvas-edges path.edge-stroke.suggested {
  stroke: var(--muted);
  stroke-width: 1.5;
  stroke-dasharray: 1 4;
  opacity: 0.55;
}
@keyframes edgeErrorFlow {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -40; }
}
@keyframes edgeIdleFlow {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: -240; }
}

/* Fullscreen builder: hide topbar and master-detail rail. */
.builder-shell.builder-fs {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: var(--paper);
}
body:has(.builder-shell.builder-fs) .topbar { display: none; }
body:has(.builder-shell.builder-fs) .md-frame { height: 100vh !important; grid-template-columns: 0 1fr !important; }
body:has(.builder-shell.builder-fs) .md-list,
body:has(.builder-shell.builder-fs) .md-rail-toggle { display: none; }
@media (max-width: 1279px) {
  .builder-body {
    display: grid !important;
    grid-template-columns: 160px minmax(0, 1fr) !important;
    grid-template-rows: minmax(0, 1fr) auto !important;
  }
  .builder-body > aside.palette { grid-row: 1 / 3; }
  .builder-body > .canvas { grid-column: 2; grid-row: 1; }
  .builder-body > aside.inspector { grid-column: 2; grid-row: 2; max-height: 38vh; border-top: 1px solid var(--hairline); }
}

/* Canvas zoom container */
.canvas-zoom-layer {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 0 0;
  width: 4000px; height: 2000px;
  pointer-events: none;
  transition: transform 480ms cubic-bezier(0.25, 1, 0.5, 1);
}
.canvas-zoom-layer > * { pointer-events: auto; }
.canvas-zoom-controls {
  position: absolute;
  right: 12px; top: 12px;
  display: flex; gap: 2px;
  background: var(--paper);
  border: 1px solid var(--hairline);
  padding: 3px;
  z-index: 6;
  box-shadow: 2px 2px 0 0 var(--ink);
}
.canvas-zoom-controls button {
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 8px;
  background: transparent;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  min-width: 24px;
  transition: background-color var(--t-feedback) var(--ease), color var(--t-feedback) var(--ease);
}
.canvas-zoom-controls button:hover { color: var(--ink); background: var(--paper-2); }
.canvas-zoom-controls button.active {
  color: var(--paper);
  background: var(--ink);
}

.node {
  position: absolute;
  width: 124px;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 2px 2px 0 0 var(--ink);
  user-select: none;
  transition:
    left .55s var(--ease-out), top .55s var(--ease-out),
    box-shadow var(--t-feedback) var(--ease),
    transform var(--t-feedback) var(--ease),
    border-color var(--t-feedback) var(--ease);
  z-index: 2;
  animation: nodeIn 280ms var(--ease-out) backwards;
}
.node.dragging {
  transition: box-shadow var(--t-feedback) var(--ease), border-color var(--t-feedback) var(--ease);
}
@keyframes nodeIn {
  from { opacity: 0; transform: scale(0.92) translateY(-4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.node:hover { box-shadow: 4px 4px 0 0 var(--ink); }
.node.selected { box-shadow: 2px 2px 0 0 var(--accent-ink); border-color: var(--accent-ink); }
.node.active   { box-shadow: 0 0 0 2px var(--accent), 3px 3px 0 0 var(--accent-ink); transform: scale(1.02); animation: nodeReceive 1.2s var(--ease) infinite; }
@keyframes nodeReceive {
  0%, 100% { box-shadow: 0 0 0 2px var(--accent), 3px 3px 0 0 var(--accent-ink); }
  50%      { box-shadow: 0 0 0 4px color-mix(in oklch, var(--accent) 60%, transparent), 3px 3px 0 0 var(--accent-ink); }
}
.node.past     { box-shadow: 2px 2px 0 0 var(--positive); border-color: var(--positive); }
.node.cycle    { box-shadow: 0 0 0 2px var(--accent), 2px 2px 0 0 var(--accent-ink); border-color: var(--accent-ink); animation: cyclePulse 1.8s var(--ease) infinite; }

.node .nhead {
  display: flex; align-items: center; justify-content: space-between;
  padding: 3px 6px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--mono); font-size: 8px;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.node .nbody {
  padding: 4px 6px;
  display: flex; flex-direction: column; gap: 1px;
  min-height: 26px;
  text-align: center; align-items: center;
}
.node .nbody .nrow { display: flex; align-items: center; justify-content: center; gap: 3px; font-size: 10px; max-width: 100%; overflow: hidden; }
.node .nbody .nrow span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.node .nbody .ncipher { font-family: var(--mono); font-size: 9px; color: var(--ink-2); width: 100%; overflow: hidden; text-overflow: ellipsis; }

/* Lines: bolder, hover-thickens, severity colors */
.canvas-edges path.edge-stroke {
  stroke: var(--ink);
  stroke-width: 2;
  fill: none;
  transition: stroke var(--t-feedback) var(--ease), stroke-width var(--t-feedback) var(--ease);
}
.canvas-edges path.edge-stroke.active { stroke: var(--accent-ink); stroke-width: 2.6; }
.canvas-edges path.edge-stroke.selected { stroke: var(--accent-ink); stroke-width: 3; }
.canvas-edges path.edge-hit:hover + path.edge-stroke,
.canvas-edges g:hover path.edge-stroke { stroke-width: 3; }
.canvas-edges path.edge-halo {
  stroke: var(--paper);
  stroke-width: 6;
  fill: none;
}
@keyframes cyclePulse {
  0%, 100% { box-shadow: 0 0 0 2px var(--danger), 3px 3px 0 0 var(--danger); }
  50%      { box-shadow: 0 0 0 4px color-mix(in oklch, var(--danger) 50%, transparent), 3px 3px 0 0 var(--danger); }
}

.node .nhead {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 9px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
.node .nbody {
  padding: 8px 10px;
  display: flex; flex-direction: column; gap: 4px;
  min-height: 36px;
}
.node .nbody .nrow { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.node .nbody .ncipher { font-family: var(--mono); font-size: 11px; color: var(--ink-2); }

.node .port {
  position: absolute;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--paper); border: 1.5px solid var(--ink);
  z-index: 3;
  cursor: crosshair;
  transition: transform var(--t-feedback) var(--ease), background-color var(--t-feedback) var(--ease);
}
/* Larger invisible hit area for touch + easier click */
.node .port::after {
  content: "";
  position: absolute; inset: -8px;
  border-radius: 50%;
}
.node .port:hover { background: var(--accent-soft); }
.node .port.in  { left: -7px;  top: 50%; transform: translateY(-50%); }
.node .port.out { right: -7px; top: 50%; transform: translateY(-50%); }
.node .port.in:hover  { transform: translateY(-50%) scale(1.35); }
.node .port.out:hover { transform: translateY(-50%) scale(1.35); }
.node .port.active { background: var(--accent); border-color: var(--accent-ink); }
.node .port.pending {
  background: var(--accent);
  border-color: var(--accent-ink);
  animation: portPulse 1.2s var(--ease) infinite;
}
@keyframes portPulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in oklch, var(--accent) 60%, transparent); }
  50%      { box-shadow: 0 0 0 8px transparent; }
}

/* Canvas drop highlight when dragging from palette */
.canvas.drop-active {
  background:
    radial-gradient(circle, color-mix(in oklch, var(--accent) 18%, transparent) 1px, transparent 1.4px) 0 0/18px 18px,
    color-mix(in oklch, var(--accent-soft) 60%, var(--paper));
  box-shadow: inset 0 0 0 2px var(--accent);
}

/* Edge draw-on */
.canvas-edges path.edge-stroke.draw-on {
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
  animation: edgeDraw .45s var(--ease-out) forwards;
}
@keyframes edgeDraw {
  to { stroke-dashoffset: 0; }
}

/* ─── Modal ─── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 80;
  background: color-mix(in oklch, var(--ink) 40%, transparent);
  backdrop-filter: blur(10px);
  display: grid; place-items: center;
  padding: 24px;
  animation: modalIn var(--t-state) var(--ease) forwards;
}
.modal-shell {
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 6px 6px 0 0 var(--ink);
  width: min(720px, 100%);
  max-height: 86vh;
  display: flex; flex-direction: column;
}
@keyframes modalIn {
  from { background: transparent; }
  to   { background: color-mix(in oklch, var(--ink) 60%, transparent); }
}

/* ─── Permit reveal cinematic root ─── */
.permit-stage[data-permit="locked"]   { --c-blur: 6.5px; }
.permit-stage[data-permit="unlocked"] { --c-blur: 0px; }

/* ─── Generic utils ─── */
.row { display: flex; align-items: center; gap: 12px; }
.col { display: flex; flex-direction: column; }
.stack-2 { display: flex; flex-direction: column; gap: 8px; }
.stack-3 { display: flex; flex-direction: column; gap: 12px; }
.stack-4 { display: flex; flex-direction: column; gap: 16px; }
.stack-6 { display: flex; flex-direction: column; gap: 24px; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.grow { flex: 1 1 auto; }

/* ─── Tab strip used in detail headers ─── */
.tabstrip {
  display: flex; align-items: stretch;
  gap: 0;
  border-bottom: 1px solid var(--hairline);
}
.tabstrip .tab {
  padding: 10px 16px;
  border: 0; background: transparent;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color var(--t-feedback) var(--ease), border-color var(--t-feedback) var(--ease);
}
.palette-item:hover {
  background: var(--paper-2);
  border-color: var(--ink-2);
  transform: translateX(2px);
}
.palette-item:active { cursor: grabbing; }

/* Polished tabstrip transitions for inspector */
.tabstrip .tab {
  position: relative;
}
.tabstrip .tab::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: -1px;
  height: 2px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--t-state) var(--ease);
}
.tabstrip .tab.active::after { transform: scaleX(1); }
.tabstrip .tab.active { border-bottom-color: transparent; }

/* ─── Animations: state-change entrance ─── */
.fade-enter {
  animation: fadeIn var(--t-state) var(--ease) forwards;
}
@keyframes fadeIn {
  from { opacity: 0.6; transform: translateY(2px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Scrollbars ─── */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--hairline-2); border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--muted-2); }

/* ─── Responsive ─── */
@media (max-width: 980px) {
  .md-frame { grid-template-columns: minmax(0, 1fr); height: auto; min-height: calc(100vh - 56px); }
  .md-list { max-height: 40vh; border-bottom: 1px solid var(--hairline); }
  .md-detail-body { padding: 20px; }
}
@media (max-width: 720px) {
  .topbar-inner nav { display: none; }
  .topbar-inner .chip:not(.live):not(.warn) { display: none; }
  .shell { padding: 0 16px; }
}
@media (max-width: 480px) {
  .topbar-inner .wordmark { font-size: 18px; }
  .shell { padding: 0 14px; }
}

/* ─── Reduced motion ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ─── Adaptive resize hardening ─── */
html, body { min-height: 100dvh; }
@media (max-width: 980px) {
  .topbar-inner { gap: 8px; flex-wrap: wrap; height: auto; min-height: 56px; padding: 8px 16px; }
  .canvas-zoom-controls { right: 8px; top: 8px; padding: 2px; }
  .canvas-zoom-controls button { padding: 4px 6px; }
}

/* MobileNav: hidden on desktop, visible on mobile */
@media (max-width: 720px) {
  .mobile-nav { display: flex !important; }
  .md-frame { padding-bottom: 56px; }
  .mobile-nav button { padding: 12px 16px; min-height: 44px; font-size: 13px; }
}

/* ─── Accessibility utilities ─── */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.sr-only:focus, .sr-only:focus-visible { position: static; width: auto; height: auto; padding: inherit; margin: inherit; overflow: visible; clip: auto; white-space: normal; }
@media (forced-colors: active) { .btn, input, select, [role="tab"] { forced-color-adjust: auto; border: 1px solid ButtonText; } }

/* Increase small button touch targets on mobile */
@media (max-width: 720px) {
  .btn.sm { padding: 10px 14px; min-height: 44px; }
  .pct-btn { padding: 8px 12px; min-height: 44px; }
}

/* ─── Zoom-dependent detail hiding ─── */
.zoom-distant .nbody { display: none; }
.zoom-distant .nhead { border-bottom: none; padding: 4px 6px; }
.zoom-distant .node { min-height: auto; }
.zoom-mid .nbody .nrow { font-size: 9px; }
.zoom-mid .nbody { padding: 3px 5px; }