:root {
  --left-w: 750px;
  --right-w: 1000px;
  --splitter-w: 8px;
  --topbar-h: 300px;
  --splitter-top-h: 7px;

  --bg: #1b1b1f;
  --bg-grad-a: #2a2331;
  --bg-grad-b: #17171b;
  --panel: #25262c;
  --surface: #30313a;
  --surface-hover: #3a3c46;
  --text: #f2f1f8;
  --muted: #b6b3c3;
  --line: #454654;
  --line-soft: #3d3e4a;
  --accent: #e95420;
  --accent-soft: #ff7a45;
  --focus: #f4a261;
  --danger: #d34b62;

  --vp-bg: #1f2027;
  --vp-grid: #393c49;
  --vp-tyre-fill: rgba(112, 118, 138, 0.34);
  --vp-tyre-stroke: rgba(178, 187, 214, 0.4);
  --vp-rim: #b8b0a2;
  --vp-rim-spokes: #c8c0b2;
  --vp-axis: #d08a74;
  --vp-spring-coil: #6ea4ff;
  --vp-spring-torsion: #95a0b2;
  --vp-damper: #ff5a6b;
  --vp-link: #8eb8ff;
  --vp-point-moving: #5fd0a3;
  --vp-point-fixed: #ff8e7a;
  --vp-point-selected-ring: #f8c14f;
  --vp-label: #f2f1f8;
  --vp-label-selected: #ffc973;
  --vp-axis-x: #ef5b70;
  --vp-axis-y: #5ccf87;
  --vp-axis-z: #67a3ff;
}

:root[data-theme="light"] {
  --bg: #eceef4;
  --bg-grad-a: #f7f7fb;
  --bg-grad-b: #dde1eb;
  --panel: #f8f9fc;
  --surface: #ffffff;
  --surface-hover: #f1f2f8;
  --text: #23242b;
  --muted: #5d5e66;
  --line: #c8ccd8;
  --line-soft: #d3d7e3;
  --accent: #e95420;
  --accent-soft: #ff7a45;
  --focus: #c85832;
  --danger: #c7364f;

  --vp-bg: #eef1f8;
  --vp-grid: #c8cdda;
  --vp-tyre-fill: rgba(55, 58, 64, 0.3);
  --vp-tyre-stroke: rgba(38, 40, 46, 0.35);
  --vp-rim: #8a7b63;
  --vp-rim-spokes: #a29076;
  --vp-axis: #7f5660;
  --vp-spring-coil: #2563a9;
  --vp-spring-torsion: #4d5a66;
  --vp-damper: #d22b2b;
  --vp-link: #30425c;
  --vp-point-moving: #1d7c57;
  --vp-point-fixed: #bb3c2b;
  --vp-point-selected-ring: #f7b500;
  --vp-label: #1a1a1a;
  --vp-label-selected: #9c5800;
  --vp-axis-x: #d14962;
  --vp-axis-y: #1d8f62;
  --vp-axis-z: #3f6ed2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Ubuntu", "Cantarell", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 14% 12%, color-mix(in srgb, var(--bg-grad-a) 86%, transparent), transparent 44%),
    radial-gradient(circle at 86% 92%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 34%),
    linear-gradient(160deg, var(--bg-grad-a) 0%, var(--bg) 48%, var(--bg-grad-b) 100%);
  height: 100vh;
  overflow: hidden;
}

#topbar {
  height: var(--topbar-h);
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 10px;
  overflow: visible;
  flex-wrap: wrap;
  position: relative;
  z-index: 200;
  backdrop-filter: blur(6px);
}

.top-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-right: 10px;
  border-right: 1px solid var(--line-soft);
}

.top-group:last-child {
  border-right: none;
}

.top-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 0.85rem;
}

#topbar select,
#topbar input[type="text"],
#topbar input[type="number"] {
  position: relative;
  z-index: 220;
}

#topbar button {
  width: auto;
}

.travel-wrap input[type="range"] {
  width: 180px;
}

.travel-value {
  width: 10ch;
  min-width: 10ch;
  display: inline-block;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--muted);
}

.drag-delta {
  width: 12ch;
  min-width: 12ch;
  display: inline-block;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--muted);
}

.version-group {
  border-right: 1px solid var(--line-soft);
  padding-right: 10px;
}

.version-badge {
  display: inline-block;
  font-size: 0.8rem;
  color: color-mix(in srgb, var(--text) 84%, var(--accent) 16%);
  background: color-mix(in srgb, var(--surface) 84%, var(--accent) 16%);
  border: 1px solid color-mix(in srgb, var(--line) 74%, var(--accent) 26%);
  border-radius: 999px;
  padding: 4px 10px;
  font-weight: 600;
}

.toggle-inline {
  font-size: 0.85rem;
}

#app {
  display: grid;
  grid-template-columns: var(--left-w) var(--splitter-w) 1fr var(--splitter-w) var(--right-w);
  grid-template-rows: minmax(0, 1fr);
  height: calc(100vh - var(--topbar-h) - var(--splitter-top-h));
}

.splitter-top {
  height: var(--splitter-top-h);
  background: linear-gradient(to bottom, transparent 0%, var(--line) 45%, var(--line) 55%, transparent 100%);
  cursor: row-resize;
  user-select: none;
}

.splitter-top:hover {
  background: linear-gradient(to bottom, transparent 0%, var(--accent) 45%, var(--accent) 55%, transparent 100%);
}

.splitter {
  background: linear-gradient(to right, transparent 0%, var(--line) 45%, var(--line) 55%, transparent 100%);
  cursor: col-resize;
  user-select: none;
  position: relative;
}

.splitter:hover {
  background: linear-gradient(to right, transparent 0%, var(--accent) 45%, var(--accent) 55%, transparent 100%);
}

.splitter-toggle {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  min-width: 18px;
  height: 28px;
  padding: 0;
  border-radius: 6px;
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  z-index: 25;
}

.splitter-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
}

.splitter.is-collapsed {
  background: transparent;
  cursor: default;
}

.panel.is-collapsed {
  padding: 0;
  border: 0;
  min-height: 0;
  max-height: 0;
  overflow: hidden;
  pointer-events: none;
}

.viewport-wrap.is-collapsed {
  overflow: hidden;
  pointer-events: none;
}

.viewport-wrap.is-collapsed #viewport,
.viewport-wrap.is-collapsed .point-readout {
  opacity: 0;
}

body.resizing {
  cursor: col-resize;
  user-select: none;
}

.panel {
  background: color-mix(in srgb, var(--panel) 95%, transparent);
  border-right: 1px solid var(--line-soft);
  padding: 10px;
  overflow: hidden;
  min-height: 0;
}

.right-panel {
  border-right: none;
  border-left: 1px solid var(--line-soft);
  overflow: auto;
}

.left-panel {
  display: flex;
  flex-direction: column;
  overflow: auto;
}

h1 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

h2 {
  margin-top: 0;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.group {
  margin: 8px 0;
}

.group.inline {
  display: flex;
  gap: 8px;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

select,
input[type="range"],
input[type="number"],
input[type="text"],
button {
  width: 100%;
}

button,
select,
input[type="number"],
input[type="text"] {
  color: var(--text);
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
}

button {
  cursor: pointer;
}

button:hover,
select:hover,
input[type="number"]:hover,
input[type="text"]:hover {
  border-color: color-mix(in srgb, var(--accent) 70%, var(--line));
  background: var(--surface-hover);
}

button:focus-visible,
select:focus-visible,
input[type="number"]:focus-visible,
input[type="text"]:focus-visible,
input[type="range"]:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.icon-btn {
  width: 34px;
  min-width: 34px;
  height: 34px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.icon-btn[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--accent) 78%, var(--line));
  background: color-mix(in srgb, var(--accent) 20%, var(--surface));
}

.theme-icon {
  position: absolute;
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 140ms ease, transform 140ms ease;
}

#theme-toggle {
  position: relative;
}

:root[data-theme="dark"] .theme-icon-moon,
:root[data-theme="light"] .theme-icon-sun {
  opacity: 1;
  transform: scale(1);
}

.menu {
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 90%, var(--surface) 10%);
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-radius: 10px;
}

.menu > summary {
  list-style: none;
  cursor: pointer;
  padding: 8px;
  font-weight: 600;
  border-bottom: 1px solid var(--line-soft);
}

.menu > summary::-webkit-details-marker {
  display: none;
}

.menu-content {
  padding: 8px;
}

.loadcases-content {
  overflow: visible;
  max-height: none;
}

.qs-wheel-card {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 8px;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
}

.model-editor-content {
  overflow: visible;
  max-height: none;
}

.editor-section {
  border: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 85%, var(--surface) 15%);
  margin-bottom: 10px;
  border-radius: 9px;
}

.editor-section > summary {
  list-style: none;
  cursor: pointer;
  padding: 8px;
  font-weight: 600;
  border-bottom: 1px solid var(--line-soft);
}

.editor-section > summary::-webkit-details-marker {
  display: none;
}

.editor-section > *:not(summary) {
  padding-left: 8px;
  padding-right: 8px;
}

.editor-section > :last-child {
  padding-bottom: 8px;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.dof-wrap {
  border: 1px dashed var(--line);
  padding: 6px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border-radius: 8px;
}

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

.dof-grid label {
  margin: 0;
  text-align: center;
}

.hover-menu {
  position: relative;
  display: inline-block;
}

.hover-menu > button {
  width: auto;
  min-width: 72px;
  padding: 7px 10px;
}

.hover-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 40;
  min-width: 220px;
  max-width: 340px;
  max-height: 360px;
  overflow: auto;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 85%, var(--surface) 15%);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.22);
  padding: 8px;
  border-radius: 10px;
}

.hover-menu:hover .hover-panel {
  display: block;
}

.hover-title {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.body-list {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 6px;
  max-height: 260px;
  overflow: auto;
  border-radius: 8px;
}

.body-list label {
  margin: 0 0 4px;
}

.viewport-wrap {
  position: relative;
  min-height: 0;
  overflow: hidden;
}

#viewport {
  width: 100%;
  height: 100%;
}

.point-readout {
  position: absolute;
  right: 10px;
  top: 10px;
  z-index: 20;
  min-width: 230px;
  font: 12px/1.35 "Ubuntu Mono", "Consolas", monospace;
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 7px 9px;
  white-space: pre-line;
  pointer-events: none;
}

.results-tabs {
  display: flex;
  gap: 6px;
  margin: 8px 0;
  align-items: center;
  flex-wrap: wrap;
}

.results-debug {
  margin: 6px 0 8px;
  padding: 6px 8px;
  border: 1px dashed color-mix(in srgb, var(--danger) 55%, var(--line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.3;
  white-space: pre-line;
  display: none;
}

.results-tab {
  width: auto;
  padding: 6px 10px;
  font-size: 0.85rem;
}

.results-tab.active {
  border-color: color-mix(in srgb, var(--accent) 75%, var(--line));
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
}

.results-live-toggle {
  width: auto;
  margin: 0 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}

.results-live-toggle input {
  width: auto;
}

.results-sweep-status {
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 4px 8px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.results-sweep-status.busy {
  color: color-mix(in srgb, var(--accent) 60%, var(--text));
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line-soft));
}

.results-sweep-status.error {
  color: #ff8e7a;
  border-color: color-mix(in srgb, #ff8e7a 60%, var(--line-soft));
}

.results-pane {
  display: none;
}

.results-pane.active {
  display: block;
}

#results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

#results-table th,
#results-table td,
#results-travel-table th,
#results-travel-table td {
  border-bottom: 1px solid var(--line-soft);
  padding: 6px;
  text-align: left;
  font-size: 0.85rem;
}

#results-table th,
#results-travel-table th {
  color: var(--muted);
}

#results-travel-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.results-pane table {
  table-layout: fixed;
}

.quasi-corners-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

.results-pane-quasi-cols-2 .quasi-corners-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.results-quasi-table th,
.results-quasi-table td {
  font-size: 0.85rem;
}

#qs-loadcase-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 8px;
}

#qs-loadcase-table th,
#qs-loadcase-table td {
  border: 1px solid var(--line-soft);
  padding: 6px 8px;
  font-size: 0.85rem;
}

#qs-loadcase-table th:nth-child(1),
#qs-loadcase-table td:nth-child(1) {
  width: 3.4rem;
}

#qs-loadcase-table th:nth-child(2),
#qs-loadcase-table td:nth-child(2) {
  width: 5.2rem;
  text-align: center;
}

#qs-loadcase-table td input[data-role="name"] {
  width: 100%;
}

#qs-loadcase-list tr.active td {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

.qs-wheel-card label {
  display: grid;
  grid-template-columns: auto minmax(68px, 1fr);
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.results-pane {
  max-height: calc(100vh - var(--topbar-h) - 180px);
  overflow: auto;
}

.results-graphs {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

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

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

.graph-controls {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  margin: 8px 0;
  align-items: center;
}

.graph-controls label {
  margin: 0;
}

.user-graph-controls {
  grid-template-columns: auto auto;
  justify-content: start;
  align-items: start;
}

.user-graph-list {
  display: none;
}

.user-graph-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: end;
}

.graph-card {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 6px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
}

.graph-card-controls {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: end;
  margin-bottom: 6px;
}

.graph-card-controls label {
  margin: 0;
}

.graph-title {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.graph-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 2px 0 6px;
  font-size: 0.74rem;
  color: var(--muted);
}

.graph-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.graph-legend-swatch {
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.graph-svg {
  width: 100%;
  min-height: 130px;
  display: block;
}

.overlay-menu {
  position: relative;
}

.overlay-menu > summary {
  list-style: none;
}

.overlay-menu > summary::-webkit-details-marker {
  display: none;
}

.overlay-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 260px;
  max-height: 260px;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 8px;
  z-index: 30;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}

.overlay-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.graph-axis-label {
  font-size: 11px;
  fill: var(--muted);
}

.graph-tick-label {
  font-size: 10px;
  fill: var(--muted);
}

@media (max-width: 1400px) {
  :root {
    --topbar-h: 92px;
  }
}

@media (max-width: 1200px) {
  body {
    overflow: auto;
  }

  #topbar {
    height: auto;
    min-height: 64px;
    flex-wrap: wrap;
  }

  .splitter-top {
    display: none;
  }

  #app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 50vh auto;
    height: auto;
  }

  .splitter {
    display: none;
  }

  .panel,
  .right-panel {
    border: none;
    border-bottom: 1px solid var(--line-soft);
  }

  .model-editor-content {
    max-height: none;
  }

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