:root {
  color-scheme: dark;
  --bg: #0f141a;
  --bg-2: #161d24;
  --panel: #1a222c;
  --panel-2: #222c37;
  --panel-soft: #202935;
  --border: #334155;
  --border-strong: #4b6074;
  --text: #edf2f7;
  --muted: #a7b4c3;
  --accent: #39b38f;
  --accent-2: #7fb8ff;
  --accent-3: #e6ab64;
  --danger: #eb7a72;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, #11171d, #0f141a 55%);
  position: relative;
}

body::before {
  content: none;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  min-height: 40px;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    border-color 0.16s ease,
    background 0.16s ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  background: #273341;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}

button.secondary {
  background: rgba(127, 184, 255, 0.12);
  border-color: rgba(127, 184, 255, 0.28);
  color: #dbeaff;
}

button.danger {
  background: rgba(235, 122, 114, 0.12);
  border-color: rgba(235, 122, 114, 0.28);
  color: #ffd9d6;
}

.small {
  font-size: 12px;
}

.muted {
  color: var(--muted);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 11px;
  color: var(--accent);
  font-weight: 800;
}

.lab-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 16px 16px 28px;
}

.lab-appbar {
  margin-bottom: 12px;
}

.appbar-main,
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.appbar-main {
  padding: 14px 18px;
}

.appbar-main--bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.appbar-copy {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.appbar-copy h1 {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.appbar-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #151c24;
  padding: 6px 10px;
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
}

.back-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-bottom: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
}

.back-link:hover {
  color: var(--text);
}

.export-actions {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
}

.export-actions button {
  flex: 0 0 auto;
}

.export-actions--header {
  align-self: flex-start;
}

.export-actions--header button {
  min-height: 38px;
  padding: 9px 12px;
}

.field {
  display: grid;
  gap: 8px;
}

.field > span,
.field label {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.02em;
}

input,
select {
  width: 100%;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #111820;
  color: var(--text);
  outline: none;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(57, 179, 143, 0.14);
}

input.is-invalid,
select.is-invalid {
  border-color: rgba(240, 108, 99, 0.9);
  box-shadow: 0 0 0 3px rgba(240, 108, 99, 0.12);
}

.lab-layout {
  display: grid;
  grid-template-columns: minmax(250px, 280px) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.panel {
  padding: 14px;
}

.editor-panel {
  position: sticky;
  top: 14px;
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-header.compact {
  align-items: center;
  margin-bottom: 10px;
}

.panel-header h2,
.panel-header h3 {
  margin: 0;
  letter-spacing: -0.01em;
}

.panel-header .muted {
  margin-top: 4px;
}

.panel-header--workspace {
  align-items: center;
}

.panel-block + .panel-block {
  margin-top: 12px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.form-grid--template {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.form-grid--template .field {
  gap: 6px;
}

.form-grid--template .field > span {
  font-size: 11px;
}

.form-grid--template input {
  padding: 10px;
}

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

.field--compact {
  min-width: 150px;
}

.inline-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.inline-button-row button {
  flex: 1 1 90px;
}

.compact-stack {
  display: grid;
  gap: 10px;
}

.compact-stack .field {
  gap: 6px;
}

.advanced-fields {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #151d26;
}

.advanced-fields summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
}

.advanced-fields summary::-webkit-details-marker {
  display: none;
}

.advanced-fields summary::after {
  content: "+";
  color: var(--muted);
}

.advanced-fields[open] summary::after {
  content: "-";
}

.advanced-fields > :not(summary) {
  padding: 0 14px 14px;
}

.scene-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.toolbar button {
  min-width: 84px;
}

.toolbar button.active {
  border-color: var(--accent);
  background: rgba(57, 179, 143, 0.14);
}

.scene-frame {
  position: relative;
  min-height: clamp(700px, 80vh, 960px);
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--border-strong);
  background:
    linear-gradient(180deg, #202832, #182029);
}

#previewCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.scene-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.scene-badge {
  position: absolute;
  transform: translate(-50%, -50%);
  min-width: 74px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(127, 184, 255, 0.34);
  background: rgba(12, 18, 26, 0.92);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
}

.scene-badge--sketch {
  border-color: rgba(57, 179, 143, 0.38);
  background: rgba(17, 37, 33, 0.92);
  color: #dcfff3;
}

.scene-badge--height {
  border-color: rgba(230, 171, 100, 0.4);
  background: rgba(40, 28, 14, 0.94);
  color: #ffe7c8;
}

.scene-badge--snap {
  border-color: rgba(127, 184, 255, 0.38);
  background: rgba(18, 32, 46, 0.94);
  color: #dcefff;
}

.scene-badge--close {
  border-color: rgba(240, 164, 93, 0.42);
  background: rgba(42, 28, 12, 0.94);
  color: #ffe6ca;
}

.scene-hint {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(13, 18, 24, 0.9);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.build-readout {
  position: absolute;
  left: 16px;
  bottom: 68px;
  max-width: min(420px, calc(100% - 32px));
  padding: 9px 12px;
  border-radius: 10px;
  background: rgba(19, 26, 36, 0.94);
  border: 1px solid rgba(127, 184, 255, 0.26);
  color: var(--text);
  font-size: 0.84rem;
  line-height: 1.35;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.16);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  pointer-events: none;
}

.build-readout.visible {
  opacity: 1;
  transform: translateY(0);
}

.panel-inline {
  padding-top: 4px;
}

.measure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.measure-grid div {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #151d26;
}

.measure-grid dt {
  font-size: 12px;
  color: var(--muted);
}

.measure-grid dd {
  margin: 4px 0 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

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

.object-chip {
  text-align: left;
  display: grid;
  gap: 4px;
}

.object-chip.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(57, 179, 143, 0.2);
}

.object-chip strong {
  font-size: 13px;
}

.selection-info {
  margin-bottom: 12px;
  color: var(--muted);
  line-height: 1.45;
  font-size: 13px;
}

.object-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.object-actions--build button {
  flex: 1 1 100%;
}

.object-actions--selection button {
  flex: 1 1 calc(50% - 8px);
}

.panel-block--toolbox {
  display: grid;
  gap: 10px;
}

.build-quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
}

.build-settings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.build-settings--compact {
  margin-top: 0;
}

.build-note {
  margin: 10px 0 0;
}

.panel-block--tight {
  margin-top: 16px;
}

.note-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.note-list li {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #151d26;
  line-height: 1.45;
  font-size: 13px;
}

.note-list li.info {
  border-color: rgba(94, 169, 255, 0.24);
  background: rgba(94, 169, 255, 0.08);
}

.note-list li.warning {
  border-color: rgba(240, 164, 93, 0.28);
  background: rgba(240, 164, 93, 0.08);
}

.note-list li.error {
  border-color: rgba(240, 108, 99, 0.35);
  background: rgba(240, 108, 99, 0.08);
}

.panel-dropdown {
  padding: 0;
  overflow: hidden;
}

.panel-dropdown summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.panel-dropdown summary::-webkit-details-marker {
  display: none;
}

.panel-dropdown summary::after {
  content: "+";
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
}

.panel-dropdown[open] summary::after {
  content: "-";
}

.panel-dropdown > :not(summary) {
  padding: 0 16px 16px;
}

.editor-panel .panel-block,
.scene-panel .panel-inline--summary {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-soft);
  padding: 14px;
}

.editor-panel .panel-dropdown,
.scene-panel .panel-inline--summary {
  background: var(--panel-soft);
}

.panel-block--hero {
  border-color: rgba(127, 184, 255, 0.2);
}

.build-note {
  max-width: 34ch;
}

.panel-inline--summary .measure-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 1160px) {
  .lab-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  }

  .editor-panel {
    position: static;
  }
}

@media (max-width: 900px) {
  .lab-layout {
    grid-template-columns: 1fr;
  }

  .scene-frame {
    min-height: 520px;
  }

  .measure-grid,
  .form-grid:not(.form-grid--template),
  .build-settings {
    grid-template-columns: 1fr;
  }

  .appbar-main--bar,
  .export-actions {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .panel-header--workspace {
    align-items: flex-start;
  }

  .toolbar {
    justify-content: flex-start;
  }

  .panel-inline--summary .measure-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .form-grid--template {
    grid-template-columns: 1fr;
  }
}