:root {
  color-scheme: dark;
  --bg: #081015;
  --bg-2: #0d171c;
  --paper: #10181d;
  --paper-elevated: #152127;
  --paper-strong: #1b2a31;
  --ink: #eef3e7;
  --muted: #98a69f;
  --line: #223038;
  --line-strong: #34454e;
  --green: #79b593;
  --green-2: #99d0ab;
  --amber: #d1a458;
  --amber-2: #e6bf7a;
  --red: #d47c6c;
  --blue: #7fa9b7;
  --soft: #0d1519;
  --soft-2: #18242a;
  --field-bg: #0d161a;
  --field-bg-raised: #162229;
  --tooltip-bg: #1c282f;
  --tooltip-ink: #f5f1e6;
  --ok-bg: rgba(40, 86, 68, 0.34);
  --ok-ink: #a3d9b9;
  --warn-bg: rgba(109, 79, 28, 0.38);
  --warn-ink: #efc983;
  --bad-bg: rgba(113, 49, 41, 0.4);
  --bad-ink: #f1aa9c;
  --info-bg: rgba(41, 80, 95, 0.32);
  --info-ink: #b3d9e4;
  --focus-ring: rgba(121, 181, 147, 0.28);
  --warning-border: rgba(212, 124, 108, 0.38);
  --warning-bg: rgba(113, 49, 41, 0.34);
  --warning-ink: #f2b0a4;
  --canvas-bg: #10181c;
  --canvas-grid: rgba(121, 181, 147, 0.08);
  --canvas-ray: rgba(121, 181, 147, 0.56);
  --canvas-tip: #d1a458;
  --canvas-text: #edf3e7;
  --canvas-wire: rgba(152, 166, 159, 0.18);
  --canvas-input-node: #7fa9b7;
  --canvas-hidden-node: #79b593;
  --canvas-output-node: #d47c6c;
  --canvas-muted: #98a69f;
  --vehicle-shadow: rgba(0, 0, 0, 0.38);
  --vehicle-shadow-fill: rgba(0, 0, 0, 0.48);
  --vehicle-cabin: #081015;
  --shadow: 0 24px 54px rgba(0, 0, 0, 0.42);
  --font-body: "Aptos", "Segoe UI Variable Text", "Segoe UI", sans-serif;
  --font-display: "Bahnschrift", "Aptos Display", "Segoe UI Variable Display", sans-serif;
  font-family: var(--font-body);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 0%, rgba(121, 181, 147, 0.18), transparent 30%),
    radial-gradient(circle at 86% 6%, rgba(209, 164, 88, 0.16), transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(127, 169, 183, 0.08), transparent 30%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.45;
  font-family: var(--font-body);
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 32px;
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(19, 29, 35, 0.96), rgba(14, 22, 26, 0.98));
  box-shadow: 0 20px 42px rgba(0, 0, 0, 0.22);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0;
  font-size: 2rem;
  line-height: 1.1;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
}

h2 {
  margin-bottom: 6px;
  font-size: 1.25rem;
  font-family: var(--font-display);
  font-weight: 700;
}

h3 {
  margin-bottom: 8px;
  font-size: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.top-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(460px, 0.95fr) minmax(420px, 1.05fr);
  gap: 24px;
  padding: 24px 32px 40px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(22, 33, 39, 0.98), rgba(14, 22, 26, 0.98));
  box-shadow: var(--shadow);
}

.builder,
.preview {
  padding: 20px;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.panel-head p,
.mutate-box p,
.guide li,
.dropzone span {
  color: var(--muted);
}

.tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  padding: 4px;
  margin-bottom: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(7, 12, 14, 0.44);
}

.tab {
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.tab:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.tab.is-active {
  background: linear-gradient(180deg, var(--paper-strong), var(--paper-elevated));
  color: var(--ink);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.24);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.grid {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.field {
  display: grid;
  gap: 6px;
}

.field span,
.switch span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.label-with-help {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  max-width: 100%;
}

.help-dot {
  --tip-box-left: auto;
  --tip-box-right: 0px;
  --tip-box-width: min(300px, calc(100vw - 72px));
  --tip-arrow-left: auto;
  --tip-arrow-right: 6px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 18px;
  width: 18px;
  min-width: 18px;
  min-height: 18px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--paper-strong);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  cursor: help;
}

.help-dot::before,
.help-dot::after {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  z-index: 20;
}

.help-dot::before {
  content: "";
  top: calc(100% + 2px);
  left: var(--tip-arrow-left);
  right: var(--tip-arrow-right);
  border-width: 6px;
  border-style: solid;
  border-color: transparent transparent var(--tooltip-bg) transparent;
}

.help-dot::after {
  content: attr(data-tip);
  top: calc(100% + 12px);
  left: var(--tip-box-left);
  right: var(--tip-box-right);
  width: var(--tip-box-width);
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--tooltip-bg);
  color: var(--tooltip-ink);
  box-shadow: var(--shadow);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
}

.help-dot:focus-visible::before,
.help-dot:focus-visible::after,
.help-dot.is-open::before,
.help-dot.is-open::after {
  opacity: 1;
}

input,
select,
textarea {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg);
  color: var(--ink);
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-color: var(--green-2);
}

input:disabled,
select:disabled,
textarea:disabled,
button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.btn {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.btn.primary {
  background: linear-gradient(180deg, #6da987, var(--green));
  color: #081015;
  box-shadow: 0 12px 20px rgba(70, 121, 94, 0.22);
}

.btn.primary:hover {
  background: var(--green-2);
  transform: translateY(-1px);
}

.btn.secondary {
  border-color: var(--line-strong);
  background: var(--paper-strong);
  color: var(--ink);
}

.btn.secondary:hover {
  border-color: var(--green);
  background: #22313a;
}

.btn.quiet {
  background: transparent;
  color: var(--muted);
}

.btn.quiet:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
}

.switch input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--green);
}

.subhead,
.mutate-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.override-box {
  display: grid;
  gap: 12px;
  padding: 14px;
  margin: 4px 0 16px;
  border: 1px solid rgba(209, 164, 88, 0.42);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(56, 43, 21, 0.5), rgba(34, 26, 14, 0.56));
}

.override-copy p {
  margin-bottom: 0;
  color: #e6bf7a;
}

.check-line,
.check-card {
  display: flex;
  align-items: center;
  gap: 10px;
}

.check-line input,
.check-card input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--amber);
}

.check-line span,
.check-card span {
  color: var(--ink);
  font-weight: 700;
}

.check-card {
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg-raised);
}

.check-card.solo {
  align-self: end;
}

.wide-field {
  grid-column: span 1;
}

.vehicle-preview {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  align-items: center;
  margin: 4px 0 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(8, 13, 16, 0.38);
}

.vehicle-stage {
  display: grid;
  place-items: center;
  min-height: 148px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, var(--canvas-grid) 1px, transparent 1px),
    linear-gradient(var(--canvas-grid) 1px, transparent 1px),
    linear-gradient(180deg, #10191d, #0b1216);
  background-size: 24px 24px;
  overflow: hidden;
}

.vehicle-stage canvas {
  display: block;
  width: 100%;
  max-width: 148px;
  height: auto;
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 6px;
  margin-top: 2px;
}

.color-swatch-btn {
  position: relative;
  min-height: 32px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  cursor: pointer;
}

.color-swatch-btn.swatch-0 {
  background: #3985bd;
}

.color-swatch-btn.swatch-1 {
  background: #42a8b4;
}

.color-swatch-btn.swatch-2 {
  background: #7f8582;
}

.color-swatch-btn.swatch-3 {
  background: #4f9c5d;
}

.color-swatch-btn.swatch-4 {
  background: #e1a33b;
}

.color-swatch-btn.swatch-5 {
  background: #805bb3;
}

.color-swatch-btn.swatch-6 {
  background: #d84b3f;
}

.color-swatch-btn.swatch-7 {
  background: #f0f0e8;
}

.color-swatch-btn.swatch-8 {
  background: #e2cf45;
}

.color-swatch-btn.is-active {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(121, 181, 147, 0.18);
}

.color-swatch-btn::after {
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 5px;
  content: "";
  pointer-events: none;
}

.override-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding-left: 20px;
  color: #e6bf7a;
}

.notes-heading {
  margin: 0 0 12px;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.note-card {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg-raised);
}

.note-card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.note-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.subhead.lower {
  margin-top: 20px;
}

.shape-tools {
  display: grid;
  gap: 10px;
  padding: 12px;
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(8, 13, 16, 0.44);
}

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

.layer-row {
  display: grid;
  grid-template-columns: minmax(96px, 1fr) auto auto auto auto;
  gap: 8px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.layer-row .btn {
  min-width: 40px;
  padding: 6px 10px;
}

.layer-row input {
  width: 76px;
  min-height: 34px;
}

.output-toggles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 12px;
}

.table-wrap {
  max-height: 300px;
  overflow: auto;
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  position: sticky;
  top: 0;
  background: var(--soft);
  z-index: 1;
}

td input {
  min-height: 34px;
}

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

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg-raised);
}

.check-item.is-disabled {
  background: #11191d;
}

.check-item.is-disabled strong,
.check-item.is-disabled span {
  color: #64706a;
}

.check-item input {
  width: 18px;
  min-height: 18px;
  margin-top: 2px;
  accent-color: var(--green);
}

.check-item strong {
  display: block;
}

.check-item span {
  color: var(--muted);
  font-size: 0.84rem;
}

.pill,
.status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 750;
}

.pill {
  background: rgba(29, 48, 40, 0.4);
  color: var(--green);
}

.pill.bad {
  background: var(--bad-bg);
  color: var(--red);
}

.status.ok {
  background: var(--ok-bg);
  color: var(--ok-ink);
}

.status.warn {
  background: var(--warn-bg);
  color: var(--warn-ink);
}

.status.bad {
  background: var(--bad-bg);
  color: var(--bad-ink);
}

.output-guide {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 12px;
}

.output-guide span {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--field-bg-raised);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.dropzone {
  display: grid;
  gap: 6px;
  padding: 18px;
  margin-bottom: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: var(--field-bg-raised);
  cursor: pointer;
}

.dropzone.is-dragging {
  border-color: var(--green);
  background: #16231d;
}

.guide {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.guide ol {
  margin: 0;
  padding-left: 22px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.metric {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg-raised);
}

.metric strong {
  display: block;
  font-size: 1.12rem;
}

.metric span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--canvas-bg);
}

.warnings {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.warning {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--warning-border);
  background: var(--warning-bg);
  color: var(--warning-ink);
}

.warning.info {
  border-color: rgba(127, 169, 183, 0.3);
  background: var(--info-bg);
  color: var(--info-ink);
}

.json-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field-bg-raised);
}

.json-box summary {
  padding: 12px;
  cursor: pointer;
  font-weight: 750;
}

pre {
  max-height: 420px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.8rem;
  white-space: pre-wrap;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 20px;
  }

  .layout {
    padding: 16px;
  }

  .grid.two,
  .grid.three,
  .grid.four,
  .metrics,
  .check-grid,
  .vehicle-preview,
  .output-toggles,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  .color-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .layer-row {
    grid-template-columns: 1fr 1fr 1fr;
  }

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