:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #68736f;
  --paper: #f4f3ee;
  --surface: #fffefa;
  --surface-soft: #eeeee7;
  --line: #d7d8cf;
  --line-strong: #aeb5ae;
  --night: #111b1a;
  --night-soft: #1a2927;
  --teal: #176f67;
  --teal-deep: #0f504b;
  --teal-soft: #dcefeb;
  --amber: #a85c10;
  --amber-soft: #fff0d8;
  --blue: #3468b1;
  --blue-soft: #e5eefb;
  --violet: #7757a7;
  --violet-soft: #eee8f8;
  --red: #b4473f;
  --red-soft: #fae8e5;
  --green: #2f7652;
  --green-soft: #e2f1e8;
  --shadow: 0 18px 48px rgb(32 42 38 / 8%);
  --shadow-small: 0 7px 20px rgb(32 42 38 / 10%);
  --radius: 16px;
  --radius-small: 9px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -15%, rgb(38 126 115 / 10%), transparent 32rem),
    linear-gradient(var(--paper), #efefe8);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
select {
  cursor: pointer;
}

button:disabled,
input:disabled,
select:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

:focus-visible {
  outline: 3px solid #eeae3e;
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  color: white;
  background: var(--night);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.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;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 128px;
  padding: 25px clamp(20px, 4vw, 64px);
  color: #f7faf7;
  background:
    linear-gradient(118deg, rgb(255 255 255 / 4%) 0 1px, transparent 1px 48px),
    linear-gradient(180deg, #172422, var(--night));
  border-bottom: 1px solid #263a37;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand-mark {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: repeat(2, 38px);
  width: 76px;
  height: 76px;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 24%);
  border-radius: 18px;
  background: #21332f;
  box-shadow: inset 0 0 0 4px rgb(255 255 255 / 3%);
}

.brand-mark::after {
  position: absolute;
  top: 50%;
  left: 12px;
  width: 52px;
  height: 1px;
  content: "";
  background: rgb(255 255 255 / 22%);
}

.brand-mark span {
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 800;
}

.brand-mark span:first-child {
  color: #a9ded7;
}

.brand-mark span:last-child {
  color: #f3bf78;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--teal);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.app-header .eyebrow {
  color: #88c8bf;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 4px;
  font-size: clamp(25px, 3vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 0;
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

h3 {
  margin-bottom: 0;
  font-size: 14px;
}

.header-copy {
  max-width: 690px;
  margin: 0;
  color: #aebcb8;
  font-size: 14px;
}

.server-cluster {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  margin-left: 28px;
}

.status-pill,
.mode-badge {
  display: inline-flex;
  align-items: center;
  width: max-content;
  border: 1px solid;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
}

.status-pill {
  gap: 8px;
  padding: 9px 12px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentcolor;
  box-shadow: 0 0 0 4px currentcolor;
}

.status-checking {
  color: #f1c887;
  border-color: #5b4d36;
  background: #2d2a20;
}

.status-online {
  color: #8dd7b2;
  border-color: #315c48;
  background: #163126;
}

.status-offline {
  color: #ef9c95;
  border-color: #633a36;
  background: #321f1d;
}

.status-checking .status-dot,
.status-online .status-dot {
  animation: status-pulse 1.8s ease-in-out infinite;
}

@keyframes status-pulse {
  50% {
    box-shadow: 0 0 0 6px transparent;
  }
}

.server-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 11px clamp(20px, 4vw, 64px);
  color: #582820;
  background: #f7d9cf;
  border-bottom: 1px solid #e7bdb2;
}

.server-banner[hidden] {
  display: none;
}

.server-banner strong {
  margin-right: 8px;
}

.app-shell {
  width: min(1880px, 100%);
  margin: 0 auto;
  padding: 20px clamp(14px, 2.2vw, 36px) 40px;
}

.project-bar {
  display: grid;
  grid-template-columns: minmax(250px, 1.45fr) minmax(160px, 0.72fr) 88px minmax(250px, 1fr) auto;
  gap: 14px;
  align-items: end;
  padding: 16px 18px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(255 254 250 / 88%);
  box-shadow: var(--shadow-small);
}

.field,
.injection-bar label {
  display: grid;
  gap: 6px;
}

.field > span,
.field > label,
.injection-bar label > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--ink);
  background: white;
}

input,
select {
  min-height: 39px;
  padding: 7px 10px;
}

textarea {
  min-height: 84px;
  padding: 9px 10px;
  resize: vertical;
}

.inline-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
}

.button,
.icon-button,
.control-button {
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 750;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.button {
  padding: 8px 13px;
}

.button:hover:not(:disabled),
.icon-button:hover:not(:disabled),
.control-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.button-primary {
  color: white;
  background: var(--teal);
  border-color: var(--teal);
  box-shadow: 0 7px 18px rgb(23 111 103 / 20%);
}

.button-primary:hover:not(:disabled) {
  background: var(--teal-deep);
}

.button-secondary {
  color: var(--teal-deep);
  background: var(--teal-soft);
  border-color: #afcfca;
}

.button-quiet,
.icon-button,
.control-button {
  color: #3d4b47;
  background: #f7f7f2;
  border-color: var(--line);
}

.app-header .button-quiet {
  color: #d5dfdc;
  background: #1d2d2a;
  border-color: #344a46;
}

.button-dark {
  color: white;
  background: #572c26;
  border-color: #572c26;
}

.button-small {
  min-height: 32px;
  padding: 6px 10px;
  font-size: 12px;
}

.workspace {
  display: grid;
  grid-template-columns: 226px minmax(650px, 1fr) 290px;
  gap: 16px;
  align-items: start;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.palette-panel,
.inspector-panel {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: auto;
  padding: 18px;
}

.circuit-panel {
  padding: 18px;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.icon-button {
  min-height: 30px;
  padding: 5px 8px;
  font-family: var(--mono);
  font-size: 11px;
}

.panel-intro {
  margin: 14px 0 17px;
  color: var(--muted);
  font-size: 12px;
}

.palette-search {
  margin-bottom: 17px;
}

.palette-no-results {
  padding: 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 9px;
  color: var(--muted);
  font-size: 11px;
}

#gate-groups .palette-group + .palette-group {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

#gate-groups .group-label > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.palette-group + .palette-group {
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.group-label,
.ledger-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.mode-badge {
  padding: 5px 7px 4px;
}

.mode-badge.exact {
  color: var(--teal-deep);
  border-color: #a5cdc6;
  background: var(--teal-soft);
}

.mode-badge.contract {
  color: #7d470d;
  border-color: #e6c292;
  background: var(--amber-soft);
}

.mode-badge.saved {
  color: #604683;
  border-color: #cdbfe2;
  background: var(--violet-soft);
}

.mode-badge.composite,
.mode-badge.logical {
  color: #604683;
  border-color: #cdbfe2;
  background: var(--violet-soft);
}

.mode-badge.neutral {
  color: #65716d;
  border-color: var(--line);
  background: var(--surface-soft);
}

.mode-badge.pass {
  color: var(--green);
  border-color: #acd4bc;
  background: var(--green-soft);
}

.mode-badge.fail {
  color: #8d332c;
  border-color: #e7b1ac;
  background: var(--red-soft);
}

.gate-palette {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.gate-card {
  position: relative;
  display: grid;
  min-height: 61px;
  padding: 9px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: left;
  background: white;
  box-shadow: 0 3px 10px rgb(30 45 40 / 5%);
}

.gate-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  content: "";
  background: var(--teal);
}

.gate-card.contract::before {
  background: var(--amber);
}

.gate-card.saved::before {
  background: var(--violet);
}

.gate-card:hover {
  border-color: #91aaa5;
  box-shadow: var(--shadow-small);
}

.gate-card[aria-pressed="true"] {
  border-color: var(--teal);
  background: #edf7f5;
  box-shadow: 0 0 0 2px rgb(23 111 103 / 14%);
}

.gate-card strong {
  align-self: center;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: -0.03em;
}

.gate-card small {
  align-self: end;
  margin-top: 3px;
  color: var(--muted);
  font-size: 9px;
}

.gate-card.wide {
  grid-column: 1 / -1;
  min-height: 54px;
}

.selected-tool-note {
  padding: 10px;
  margin-top: 17px;
  border: 1px dashed var(--line-strong);
  border-radius: 9px;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 11px;
}

.circuit-heading {
  align-items: center;
}

.cut-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

#cut-count-label {
  min-width: 48px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  text-align: center;
}

.level-callout {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  margin: 14px 0;
  border: 1px solid #bdd5d0;
  border-radius: 10px;
  background: #eef7f5;
}

.level-token {
  flex: 0 0 auto;
  padding: 5px 8px;
  border-radius: 7px;
  color: white;
  background: var(--teal);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
}

.level-callout p {
  margin: 0;
  color: #38514d;
  font-size: 12px;
}

.injection-bar {
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  gap: 10px;
  align-items: end;
  padding: 10px 12px 12px;
  margin: 0 0 14px;
  border: 1px solid #e5b66f;
  border-radius: 10px;
  background: #fff8e9;
}

.error-toolbox {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.error-tool {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 5px 9px;
  border: 1px solid #d8b780;
  border-radius: 8px;
  color: #66451e;
  background: #fffdf8;
  font-size: 11px;
  font-weight: 750;
}

.error-tool[aria-pressed="true"] {
  border-color: var(--amber);
  background: #ffe8bd;
  box-shadow: 0 0 0 2px rgb(168 92 16 / 14%);
}

.error-tool .error-chip {
  width: 23px;
  height: 23px;
}

.injection-instruction {
  align-self: center;
  margin: 0;
  color: #775736;
  font-size: 10px;
}

.endpoint-prompt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 12px;
  margin-bottom: 14px;
  border: 1px solid #b8a6d1;
  border-radius: 10px;
  color: #523975;
  background: var(--violet-soft);
}

.endpoint-prompt[hidden] {
  display: none;
}

.endpoint-prompt strong,
.endpoint-prompt span {
  display: block;
}

.endpoint-prompt strong {
  font-size: 12px;
}

.endpoint-prompt span {
  margin-top: 2px;
  font-size: 10px;
}

.injection-bar legend {
  padding: 0 6px;
  color: #7c480e;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.injection-bar select {
  min-height: 34px;
  background: #fffdf8;
}

.injection-key {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 8px;
  padding-bottom: 5px;
  color: #775736;
  font-size: 10px;
}

.error-chip {
  display: inline-grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border: 2px solid currentcolor;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
  background: white;
}

.error-chip.X {
  color: var(--blue);
}

.error-chip.Y {
  color: var(--violet);
  border-radius: 6px;
  transform: rotate(45deg);
}

.error-chip.Y span {
  transform: rotate(-45deg);
}

.error-chip.Z {
  color: var(--red);
  border-radius: 5px;
}

.error-chip.I {
  color: var(--muted);
  border-style: dashed;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 42px;
  padding: 6px 8px 6px 12px;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 11px 11px 0 0;
  color: var(--muted);
  background: #f5f6f1;
}

.canvas-toolbar p {
  margin: 0;
  font-size: 10px;
}

kbd {
  padding: 2px 5px;
  border: 1px solid #cbd0c8;
  border-bottom-width: 2px;
  border-radius: 4px;
  color: #46534f;
  background: white;
  font-family: var(--mono);
  font-size: 9px;
}

.zoom-controls {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 4px;
}

.zoom-controls .icon-button {
  min-width: 31px;
  padding-inline: 7px;
  background: white;
}

.zoom-controls .pan-toggle {
  min-width: 54px;
  margin-right: 4px;
}

.zoom-controls .pan-toggle[aria-pressed="true"] {
  color: white;
  border-color: var(--teal);
  background: var(--teal);
}

.zoom-readout {
  min-width: 58px;
  min-height: 30px;
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: #46534f;
  background: white;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.canvas-shell {
  position: relative;
}

.timeline-scroll {
  position: relative;
  width: 100%;
  height: clamp(360px, 56vh, 620px);
  max-width: 100%;
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--line);
  border-radius: 0 0 11px 11px;
  background: #fdfdfa;
  cursor: grab;
  scrollbar-color: #9dadA8 #eef0ea;
  scrollbar-width: thin;
  touch-action: pan-x pan-y;
}

.timeline-scroll:focus-visible {
  outline-offset: -3px;
}

.timeline-scroll.is-panning {
  cursor: grabbing;
  user-select: none;
}

.timeline-scroll.pan-mode {
  cursor: grab;
  touch-action: none;
}

.timeline-scroll.is-panning .timeline-grid {
  pointer-events: none;
}

.timeline-sizer {
  position: relative;
  min-width: 100%;
  min-height: 100%;
}

.timeline-grid {
  position: absolute;
  top: 0;
  left: 0;
  overflow: visible;
  background:
    linear-gradient(180deg, #f4f5f0 0 48px, transparent 48px),
    radial-gradient(circle, rgb(80 99 93 / 16%) 1px, transparent 1.2px) 0 48px / 16px 16px,
    #fffefa;
  transform-origin: 0 0;
}

.canvas-grid-row {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.canvas-grid-row > .canvas-corner,
.canvas-grid-row > .canvas-cut-heading,
.canvas-grid-row > .canvas-wire-label,
.canvas-grid-row > .canvas-cell {
  pointer-events: auto;
}

.canvas-corner {
  position: absolute;
  z-index: 7;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 154px;
  height: 48px;
  padding: 0 13px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: #eef0ea;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.canvas-corner strong {
  color: var(--ink);
}

.canvas-column-band {
  position: absolute;
  z-index: 0;
  top: 0;
  border-right: 1px solid #e5e7df;
}

.canvas-column-band:nth-of-type(even) {
  background: rgb(23 111 103 / 1.5%);
}

.canvas-column-band.active-cut {
  background: linear-gradient(180deg, rgb(23 111 103 / 16%), rgb(23 111 103 / 5%));
  box-shadow: inset 2px 0 rgb(23 111 103 / 34%), inset -2px 0 rgb(23 111 103 / 34%);
}

.canvas-column-band.output-cut {
  border-right: 3px solid var(--violet);
  border-left: 2px solid rgb(119 87 167 / 42%);
  background: linear-gradient(180deg, rgb(119 87 167 / 15%), rgb(119 87 167 / 5%));
}

.canvas-column-band.output-cut.active-cut {
  background: linear-gradient(180deg, rgb(119 87 167 / 24%), rgb(23 111 103 / 9%));
  box-shadow: inset 3px 0 rgb(23 111 103 / 48%);
}

.canvas-cut-heading {
  position: absolute;
  z-index: 6;
  top: 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 5px;
  height: 48px;
  padding-top: 14px;
  border-right: 1px solid #dfe2da;
  border-bottom: 1px solid var(--line);
  color: #78827f;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.canvas-cut-heading strong {
  color: #43504c;
  font-size: 11px;
}

.canvas-cut-heading.active-cut {
  color: var(--teal-deep);
  background: var(--teal-soft);
}

.canvas-cut-heading.output-cut {
  color: #684a91;
  background: var(--violet-soft);
}

.canvas-wire-line {
  position: absolute;
  z-index: 2;
  height: 2px;
  pointer-events: none;
  background: #aeb7b3;
  transform: translateY(-1px);
}

.canvas-wire-label {
  position: absolute;
  z-index: 6;
  left: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 22px 0 12px;
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid #e5e7df;
  color: var(--ink);
  background: #f8f8f3;
  box-shadow: 7px 0 12px rgb(29 42 38 / 4%);
}

.canvas-wire-label::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 14px;
  height: 2px;
  content: "";
  background: #9ba7a3;
}

.canvas-wire-label strong,
.canvas-wire-label span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.canvas-wire-label strong {
  font-family: var(--mono);
  font-size: 11px;
}

.canvas-wire-label span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 650;
}

.cell-dropzone.canvas-cell {
  position: absolute;
  z-index: 3;
  display: grid;
  place-items: center;
  padding: 3px;
  border: 0;
  border-radius: 0;
  background: transparent;
  cursor: crosshair;
}

.cell-dropzone.canvas-cell:hover,
.cell-dropzone.canvas-cell:focus-visible,
.cell-dropzone.canvas-cell.drag-over {
  background: rgb(23 111 103 / 9%);
  box-shadow: inset 0 0 0 2px rgb(23 111 103 / 60%);
}

.cell-dropzone.canvas-cell.active-cut {
  background: rgb(23 111 103 / 4%);
}

.cell-dropzone.canvas-cell.injection-cell {
  background: rgb(240 166 49 / 14%);
}

.cell-dropzone.canvas-cell.output-cut:hover,
.cell-dropzone.canvas-cell.output-cut:focus-visible {
  background: rgb(119 87 167 / 14%);
  box-shadow: inset 0 0 0 2px rgb(119 87 167 / 62%);
}

.injection-marker {
  position: absolute;
  z-index: 10;
  top: 3px;
  left: calc(4px + var(--error-index, 0) * 18px);
  display: grid;
  place-items: center;
  width: 23px;
  height: 23px;
  border: 2px solid currentcolor;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
  background: white;
  box-shadow: 0 2px 8px rgb(68 40 10 / 18%);
}

.injection-marker.X {
  color: var(--blue);
}

.injection-marker.Y {
  color: var(--violet);
  border-radius: 5px;
}

.injection-marker.Z {
  color: var(--red);
  border-radius: 4px;
}

.canvas-pending-endpoint {
  position: absolute;
  z-index: 7;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 2px dashed var(--violet);
  border-radius: 50%;
  color: var(--violet);
  background: white;
  font-family: var(--mono);
  font-weight: 900;
  transform: translate(-50%, -50%);
}

.operation-chip.canvas-operation {
  position: absolute;
  z-index: 8;
  display: grid;
  place-items: center;
  min-width: 38px;
  min-height: 38px;
  max-width: 82px;
  padding: 4px 7px;
  overflow: hidden;
  border: 2px solid var(--teal);
  border-radius: 7px;
  color: var(--teal-deep);
  text-overflow: ellipsis;
  white-space: nowrap;
  background: #f3fbf9;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
  box-shadow: 0 3px 8px rgb(23 111 103 / 14%);
  transform: translate(-50%, -50%);
}

.operation-chip.canvas-operation.saved {
  border-color: var(--violet);
  color: #5e3f87;
  background: var(--violet-soft);
}

.canvas-operation-connector {
  position: absolute;
  z-index: 5;
  width: 3px;
  pointer-events: none;
  background: var(--teal);
  box-shadow: 0 0 0 1px white;
  transform: translateX(-50%);
}

.canvas-operation-connector.saved {
  background: var(--violet);
}

.operation-node.canvas-operation {
  position: absolute;
  z-index: 8;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  color: var(--teal-deep);
  background: transparent;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
  transform: translate(-50%, -50%);
}

.operation-core {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 2px;
  overflow: hidden;
  border: 2px solid var(--teal);
  border-radius: 7px;
  background: #f5fcfa;
  box-shadow: 0 3px 8px rgb(23 111 103 / 16%);
}

.operation-node.control .operation-core {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--teal);
  background: var(--teal);
  font-size: 0;
}

.operation-node.symmetric .operation-core {
  border-radius: 50%;
  font-size: 8px;
}

.operation-node.saved .operation-core {
  border-color: var(--violet);
  color: #5e3f87;
  background: var(--violet-soft);
}

.operation-identity {
  position: absolute;
  top: -7px;
  left: calc(50% + 17px);
  padding: 1px 3px;
  border-radius: 3px;
  color: #52605c;
  background: rgb(255 254 250 / 92%);
  font-size: 7px;
  line-height: 1.1;
  white-space: nowrap;
}

.canvas-operation:hover .operation-core,
.canvas-operation:focus-visible .operation-core,
.canvas-operation.drag-over .operation-core {
  box-shadow: 0 0 0 3px rgb(23 111 103 / 20%), 0 4px 10px rgb(23 111 103 / 18%);
}

.canvas-operation.selected,
.canvas-operation.selected .operation-core {
  box-shadow: 0 0 0 3px rgb(238 174 62 / 50%), 0 5px 12px rgb(23 111 103 / 20%);
}

.canvas-output-jump {
  position: absolute;
  z-index: 20;
  top: 12px;
  right: 13px;
  min-height: 29px;
  padding: 5px 9px;
  border: 1px solid #bca9d7;
  border-radius: 999px;
  color: #5f4189;
  background: rgb(250 247 255 / 94%);
  box-shadow: 0 4px 14px rgb(44 31 63 / 14%);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 850;
}

.final-output {
  padding-top: 14px;
  margin-top: 15px;
  border-top: 1px solid var(--line);
}

.final-output .group-label > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 800;
}

.final-output-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 7px;
}

.output-wire {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px auto;
  gap: 7px;
  align-items: center;
  min-height: 48px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.output-wire.has-error {
  border-color: #e3a9a3;
  background: #fff5f3;
}

.output-wire strong,
.output-wire small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.output-wire strong {
  font-family: var(--mono);
  font-size: 10px;
}

.output-wire small {
  color: var(--muted);
  font-size: 8px;
}

.output-wire b {
  color: var(--muted);
  font-size: 9px;
}

.output-wire.has-error b {
  color: var(--red);
}

.operation-node.contract {
  border-color: var(--amber);
  color: var(--amber);
}

.operation-node.saved {
  border-color: var(--violet);
  color: var(--violet);
}

.timeline-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
}

.grid-help {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.run-icon {
  margin-right: 5px;
  font-size: 10px;
}

.playback {
  padding: 14px;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8f8f3;
}

.playback-title,
.playback-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.playback-title h3 {
  font-size: 15px;
}

.playback-title p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 10px;
}

.playback-controls {
  display: grid;
  grid-template-columns: auto auto auto auto minmax(100px, 1fr) auto;
  margin-top: 12px;
}

.control-button {
  min-height: 32px;
  padding: 5px 9px;
  font-size: 10px;
}

.control-play {
  color: white;
  background: var(--night-soft);
  border-color: var(--night-soft);
}

.scrubber-field {
  display: flex;
  align-items: center;
  min-width: 80px;
}

.scrubber-field input {
  min-height: 25px;
  padding: 0;
  accent-color: var(--teal);
}

#frame-counter {
  min-width: 52px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  text-align: right;
}

.trace-wire-list {
  display: grid;
  gap: 6px;
  margin-top: 12px;
}

.trace-wire {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) 36px minmax(150px, 1.6fr);
  gap: 10px;
  align-items: center;
  min-height: 35px;
  padding: 5px 9px;
  border: 1px solid #e0e1da;
  border-radius: 8px;
  background: white;
}

.trace-wire-name {
  overflow: hidden;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 750;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.trace-wire-note {
  color: var(--muted);
  font-size: 9px;
  text-align: right;
}

.trace-empty {
  display: grid;
  min-height: 68px;
  place-items: center;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--muted);
  font-size: 11px;
}

.inspector-content {
  padding: 14px 0 18px;
}

.inspector-empty {
  padding: 18px 10px;
  color: var(--muted);
  text-align: center;
}

.empty-glyph {
  display: block;
  color: #92a29d;
  font-family: var(--mono);
  font-size: 35px;
}

.inspector-empty h3 {
  margin: 6px 0;
  color: var(--ink);
  font-size: 14px;
}

.inspector-empty p {
  margin: 0;
  font-size: 11px;
}

.inspector-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.inspector-title-row h3 {
  font-family: var(--mono);
  font-size: 17px;
}

.inspector-description {
  margin-bottom: 13px;
  color: #4f5d59;
  font-size: 12px;
}

.property-list {
  display: grid;
  gap: 1px;
  margin: 0 0 13px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.property-row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 8px;
  padding: 7px 8px;
  background: white;
}

.property-row dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
}

.property-row dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-family: var(--mono);
  font-size: 10px;
  text-align: right;
}

.explanation-box {
  padding: 10px;
  margin-bottom: 12px;
  border-left: 3px solid var(--teal);
  border-radius: 4px 8px 8px 4px;
  background: #edf6f4;
  color: #304d48;
  font-size: 11px;
}

.explanation-box.contract {
  border-left-color: var(--amber);
  background: var(--amber-soft);
  color: #60421e;
}

.explanation-box.composite,
.explanation-box.logical {
  border-left-color: var(--violet);
  color: #513d6e;
  background: var(--violet-soft);
}

.explanation-box.fail {
  border-left-color: var(--red);
  background: var(--red-soft);
  color: #692d28;
}

.inspector-actions {
  display: flex;
  gap: 7px;
}

.inspector-actions .button {
  flex: 1;
  font-size: 11px;
}

.danger-button {
  color: #93372f;
  border-color: #e5bbb6;
  background: #fff4f2;
}

.contract-ledger {
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.ledger-heading-row h3 {
  font-size: 13px;
}

.ledger-heading-row span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.contract-list {
  display: grid;
  gap: 7px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.contract-item {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 7px;
  align-items: start;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfbf7;
  font-size: 10px;
}

.contract-item .check-icon {
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  color: white;
  background: var(--green);
  font-size: 10px;
  font-weight: 900;
}

.contract-item.fail .check-icon {
  background: var(--red);
}

.contract-item.readout .check-icon {
  color: var(--blue);
  background: var(--blue-soft);
}

.contract-item strong,
.contract-item span {
  display: block;
}

.contract-item span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 9px;
}

.muted-list-item {
  padding: 10px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  color: var(--muted);
  font-size: 10px;
}

.black-box-dialog {
  width: min(510px, calc(100% - 28px));
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 30px 90px rgb(9 20 17 / 30%);
}

.black-box-dialog::backdrop {
  background: rgb(12 23 20 / 55%);
  backdrop-filter: blur(3px);
}

.black-box-dialog form {
  display: grid;
  gap: 15px;
  padding: 22px;
}

.black-box-dialog p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
}

.dialog-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.dialog-heading h2 {
  font-size: 20px;
}

.dialog-close {
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  background: var(--surface-soft);
  font-size: 20px;
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #4d5b57;
  font-size: 12px;
}

.checkbox-field input {
  width: 17px;
  height: 17px;
  min-height: 0;
  accent-color: var(--teal);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 2px;
}

.toast {
  position: fixed;
  z-index: 90;
  right: 20px;
  bottom: 20px;
  max-width: min(390px, calc(100vw - 40px));
  padding: 11px 14px;
  border: 1px solid #355650;
  border-radius: 10px;
  color: white;
  background: #1b302c;
  box-shadow: 0 12px 34px rgb(9 20 17 / 22%);
  font-size: 12px;
}

.toast.error {
  border-color: #8d4c46;
  background: #542c28;
}

.noscript-message {
  position: fixed;
  right: 20px;
  bottom: 20px;
  left: 20px;
  padding: 14px;
  border-radius: 10px;
  color: white;
  background: #7a322c;
  text-align: center;
}

@media (max-width: 1320px) {
  .project-bar {
    grid-template-columns: minmax(250px, 1.3fr) minmax(160px, 0.8fr) 80px minmax(240px, 1fr);
  }

  .project-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .workspace {
    grid-template-columns: 210px minmax(600px, 1fr);
  }

  .inspector-panel {
    position: static;
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(230px, 0.8fr) minmax(360px, 1.2fr);
    gap: 20px;
    max-height: none;
  }

  .inspector-panel > .panel-heading {
    grid-column: 1 / -1;
  }

  .contract-ledger {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }
}

@media (max-width: 920px) {
  .app-header {
    align-items: flex-start;
  }

  .server-cluster {
    flex-direction: column;
    align-items: flex-end;
  }

  .project-bar {
    grid-template-columns: minmax(0, 1fr) minmax(150px, 0.75fr) 82px;
  }

  .field-example {
    grid-column: 1 / -1;
  }

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

  .palette-panel,
  .inspector-panel {
    position: static;
    max-height: none;
  }

  .gate-palette {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .gate-card.wide {
    grid-column: auto;
  }

  .injection-bar {
    grid-template-columns: minmax(0, 1fr) minmax(180px, 1fr) auto;
  }

  .timeline-scroll {
    height: min(58vh, 560px);
  }
}

@media (max-width: 660px) {
  .app-header {
    display: grid;
    gap: 20px;
  }

  .brand-mark {
    display: none;
  }

  .server-cluster {
    flex-direction: row;
    align-items: center;
    margin-left: 0;
  }

  .server-banner {
    align-items: flex-start;
  }

  .server-banner span {
    display: block;
    margin-top: 3px;
  }

  .project-bar {
    grid-template-columns: minmax(0, 1fr) 78px;
  }

  .field-name,
  .field-example,
  .project-actions {
    grid-column: 1 / -1;
  }

  .project-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .project-actions .button:last-child {
    grid-column: 1 / -1;
  }

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

  .circuit-panel,
  .palette-panel,
  .inspector-panel {
    padding: 14px;
  }

  .circuit-heading {
    align-items: flex-start;
  }

  .cut-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  #cut-count-label {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .injection-bar {
    grid-template-columns: 1fr;
  }

  .canvas-toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 7px;
    padding: 9px;
  }

  .zoom-controls {
    justify-content: flex-end;
  }

  .timeline-scroll {
    height: min(54vh, 480px);
    min-height: 320px;
  }

  .canvas-output-jump {
    top: 9px;
    right: 9px;
  }

  .timeline-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .playback-controls {
    grid-template-columns: repeat(4, 1fr);
  }

  .scrubber-field {
    grid-column: 1 / 4;
  }

  .trace-wire {
    grid-template-columns: minmax(90px, 1fr) 34px;
  }

  .trace-wire-note {
    grid-column: 1 / -1;
    text-align: left;
  }

  .inspector-panel {
    display: block;
  }

  .contract-ledger {
    padding-top: 15px;
    padding-left: 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}