:root {
  color-scheme:light;
  --paper:#f7f8f6;
  --ink:#172f3c;
  --muted:#60717a;
  --line:#dce3e2;
  --accent:#0c6c65;
  --green:#238355;
  --red:#bd4c45;
  font:14px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif
}
* {
  box-sizing:border-box
}
body {
  margin:0;
  background:var(--paper);
  color:var(--ink);
  height:100vh;
  height:100dvh;
  display:grid;
  grid-template-rows:auto minmax(0,1fr)
}
button,input,select {
  font:inherit
}
button,select,input[type=checkbox],input[type=range] {
  cursor:pointer
}
button,select,input[type=number] {
  border:1px solid #c9d4d4;
  background:#fff;
  color:var(--ink);
  border-radius:5px;
  min-height:42px
}
button {
  padding:7px 12px
}
button:hover {
  background:#eaf2ef;
  border-color:#92aaa6
}
button:active {
  transform:translateY(1px)
}
:focus-visible {
  outline:3px solid #d29c36;
  outline-offset:3px
}
button:disabled,input:disabled,select:disabled {
  cursor:default;
  opacity:.5
}
select {
  width:100%;
  padding:8px 28px 8px 10px
}
input[type=number] {
  width:100%;
  min-width:0;
  padding:7px;
  text-align:right;
  font-variant-numeric:tabular-nums
}
input[type=range] {
  width:100%;
  accent-color:var(--accent);
  min-height:34px;
  margin:0
}
input[type=checkbox] {
  width:18px;
  height:18px;
  accent-color:var(--accent);
  flex:0 0 auto;
  margin:0
}
label:not(.check) {
  display:block;
  font-size:12px;
  font-weight:600;
  margin:12px 0 5px
}
p {
  margin:0
}
h1,h3 {
  margin:0
}
h3 {
  font-size:13px
}
fieldset {
  padding:0;
  margin:0;
  border:0;
  min-width:0
}
fieldset:disabled {
  opacity:.6
}
.app-header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 24px;
  border-bottom:1px solid var(--line);
  min-height:76px
}
.brand {
  display:flex;
  align-items:center;
  gap:12px
}
.brand svg {
  color:var(--accent);
  flex-shrink:0
}
h1 {
  font-size:22px;
  font-weight:650;
  letter-spacing:-.8px;
  line-height:1.2
}
h1 span {
  color:#b3bfbd;
  font-weight:300;
  margin:0 7px
}
h1 small {
  font-size:14px;
  letter-spacing:0;
  font-weight:450
}
.brand p {
  font-size:11px;
  color:var(--muted);
  margin-top:4px;
  letter-spacing:.25px
}
#connection {
  font-size:11px;
  color:var(--muted);
  display:flex;
  align-items:center;
  gap:7px
}
#connection:before {
  content:"";
  width:6px;
  height:6px;
  background:#b38e49;
  border-radius:50%;
  flex-shrink:0
}
#connection[data-state=ready]:before {
  background:var(--green)
}
#connection[data-state=error] {
  color:#a63b35
}
#connection[data-state=error]:before {
  background:var(--red)
}
.workspace {
  display:grid;
  grid-template-columns:350px minmax(0,1fr);
  min-height:0
}
.sidebar {
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-width:thin;
  padding:0 20px 24px;
  border-right:1px solid var(--line)
}
.panel {
  padding:20px 0;
  border-bottom:1px solid var(--line)
}
.eyebrow {
  font-size:10px;
  letter-spacing:1.4px;
  font-weight:700;
  text-transform:uppercase;
  color:var(--muted)
}
.section-heading {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px
}
.text-button {
  font-size:11px;
  color:var(--accent);
  border:0;
  background:transparent;
  min-height:32px;
  padding:4px 0
}
.help {
  font-size:11px;
  line-height:1.6;
  color:var(--muted);
  margin-top:8px
}
.view-row {
  display:flex;
  gap:6px
}
.view-row select {
  min-width:0
}
.view-row button {
  font-size:21px;
  width:44px;
  padding:0;
  flex-shrink:0
}
.readout-head,.readout {
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr 1fr;
  gap:8px;
  align-items:center
}
.readout-head {
  color:var(--muted);
  font-size:10px;
  margin:14px 0 3px;
  text-align:right
}
.readout-head span:first-child {
  text-align:left
}
.readout {
  padding:9px 0;
  font-size:12px;
  border-top:1px solid var(--line)
}
.readout output {
  font:500 15px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;
  text-align:right;
  font-variant-numeric:tabular-nums
}
.readout i {
  display:inline-block;
  width:5px;
  height:5px;
  border-radius:50%;
  margin-right:7px
}
.left-eye i {
  background:var(--green)
}
.right-eye i {
  background:var(--red)
}
.parameter-heading,.parameter-row {
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:8px;
  align-items:center
}
.parameter-heading {
  font-size:10px;
  color:var(--muted);
  margin:18px 0 7px
}
.parameter-heading span {
  text-align:left
}
.parameter-row {
  margin:7px 0
}
.toggle-grid {
  display:grid;
  grid-template-columns:1fr;
  gap:2px;
  margin-top:12px
}
.check {
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  min-height:38px;
  padding:5px 0
}
.reference-card {
  border:1px solid var(--line);
  border-left:3px solid #9aafa9;
  border-radius:5px;
  padding:12px;
  margin-top:12px;
  background:#fff
}
.reference-card p {
  font-size:11px;
  color:var(--muted);
  margin:5px 0 10px
}
.reference-card output {
  display:block;
  font:11px/1.6 ui-monospace,monospace;
  white-space:pre-line;
  margin-bottom:12px
}
.reference-card button {
  font-size:11px;
  width:100%
}
.listing-panel {
  border-left:2px solid #b6cdc7;
  padding-left:12px;
  margin-left:-12px
}
summary {
  cursor:pointer;
  min-height:30px;
  display:list-item;
  font-size:12px
}
summary::marker {
  color:#829996
}
.detail-body {
  padding-top:8px
}
.range-label {
  display:flex!important;
  justify-content:space-between;
  gap:8px
}
.range-label output {
  font-variant-numeric:tabular-nums;
  font-weight:400
}
.manual-eye {
  margin-top:14px
}
.manual-eye h3 {
  font-size:12px;
  margin-bottom:8px
}
.manual-row {
  display:grid;
  grid-template-columns:86px minmax(0,1fr) 60px;
  gap:6px;
  align-items:center;
  font-size:11px
}
/* Mechanical axes: base, system, ring, bow, torsion (same hues as the model). */
.manual-row[data-axis=a] { --axis-color:#2563eb; }
.manual-row[data-axis=b] { --axis-color:#d6b000; }
.manual-row[data-axis=c] { --axis-color:#d43b35; }
.manual-row[data-axis=d] { --axis-color:#16863a; }
.manual-row[data-axis=e] { --axis-color:#009caa; }
.manual-row .coordinate-reset {
  margin:0!important;
  border-left:4px solid var(--axis-color);
  padding-left:6px
}
.manual-row input[type=range] {
  accent-color:var(--axis-color)
}
.manual-row input[type=number] {
  font-size:11px;
  padding:4px
}
.usage {
  border-bottom:0
}
.usage p {
  font-size:11px;
  color:var(--muted);
  margin-top:10px
}
.model-stage {
  position:relative;
  min-width:0;
  min-height:0;
  background:#10232f;
  overflow:hidden
}
x3d-canvas {
  display:block;
  width:100%;
  height:100%;
  border:0
}
.loading {
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:18px;
  background:#10232f;
  color:#a5b7c1;
  font-size:12px;
  pointer-events:none
}
.loading-ring {
  display:block;
  width:30px;
  height:30px;
  border:1px solid #536570;
  border-top-color:#b1dbce;
  border-radius:50%;
  animation:spin 1.4s linear infinite
}
.error-help {
  font-size:12px;
  color:#a63b35;
  padding:14px 0
}
.error-help button {
  margin-top:10px
}
.sr-only {
  position:absolute;
  width:1px;
  height:1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap
}
[hidden] {
  display:none!important
}
@keyframes spin {
  to {
    transform:rotate(360deg)
  }
}
@media(prefers-reduced-motion:reduce) {
  *,*::before,*::after {
    animation:none!important;
    scroll-behavior:auto!important
  }
}
@media(orientation:portrait) {
  .workspace {
    grid-template-columns:minmax(0,1fr);
    grid-template-rows:minmax(220px,45%) minmax(0,1fr)
  }
  .model-stage {
    grid-row:1
  }
  .sidebar {
    grid-row:2;
    border-right:0;
    border-top:1px solid var(--line);
    padding:0 22px 24px
  }
  .app-header {
    padding:12px 18px;
    min-height:67px
  }
  .brand svg {
    width:29px;
    height:29px
  }
  .brand p {
    font-size:10px
  }
  h1 {
    font-size:21px
  }
  h1 small {
    font-size:12px
  }
  #connection {
    max-width:110px;
    font-size:10px
  }
  .panel {
    padding:17px 0
  }
  .sidebar>fieldset {
    max-width:680px;
    margin:auto
  }
  .usage,.error-help {
    max-width:680px;
    margin:auto
  }
}
@media(orientation:landscape) and (max-width:900px) {
  .workspace {
    grid-template-columns:290px minmax(0,1fr)
  }
  .sidebar {
    padding:0 15px 20px
  }
  .app-header {
    min-height:52px;
    padding:8px 18px
  }
  .brand p {
    display:none
  }
  .brand svg {
    width:28px;
    height:28px
  }
  .panel {
    padding:15px 0
  }
}
@media(max-width:370px) {
  h1 small {
    display:none
  }
  .app-header {
    gap:8px
  }
  .sidebar {
    padding-left:15px;
    padding-right:15px
  }
}
@media(orientation:portrait) and (max-height:600px) {
  .workspace {
    grid-template-rows:minmax(140px,40%) minmax(0,1fr)
  }
}
.header-controls {
  display:flex;
  align-items:center;
  gap:18px
}
.header-controls select {
  width:180px;
  min-height:36px;
  font-size:12px
}
.switch-note {
  font-size:10px;
  color:var(--muted);
  padding:14px 0 0
}
.classic .workspace {
  grid-template-columns:minmax(0,1fr);
  grid-template-rows:minmax(0,1fr)
}
.classic .sidebar {
  display:none
}
.classic .model-stage {
  grid-row:1
}
@media(max-width:600px) {
  .header-controls {
    align-items:flex-end;
    flex-direction:column;
    gap:4px
  }
  .header-controls select {
    width:150px;
    font-size:11px;
    min-height:32px
  }
  #connection {
    max-width:none
  }
  .brand p {
    max-width:170px
  }
  .app-header {
    gap:8px;
    padding-left:14px;
    padding-right:14px
  }
  .brand {
    gap:8px
  }
  h1 small {
    display:none
  }
  h1 span {
    display:none
  }
}
.loading button {
  pointer-events:auto
}
.loading {
  padding:20px;
  text-align:center
}
.parameter-cell {
  min-width:0;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(50px,60px);
  gap:0 4px;
  align-items:center
}
.coordinate-reset {
  display:flex;
  align-items:center;
  gap:3px;
  min-width:0;
  min-height:34px;
  padding:4px 0;
  border:0;
  border-radius:3px;
  background:transparent;
  font-size:11px;
  font-weight:600;
  text-align:left;
  line-height:1.5
}
.coordinate-reset:hover:not(:disabled) {
  background:#eaf2ef;
  text-decoration:underline;
  text-underline-offset:3px
}
.coordinate-reset>span[aria-hidden] { color:var(--muted); flex-shrink:0; }
.parameter-cell input[type=range] {
  grid-column:1 / -1;
  display:block;
  min-height:30px
}
.interface-choice {
  display:flex;
  flex-direction:column;
  gap:3px
}
.interface-choice>span {
  font-size:9px;
  color:var(--muted)
}
/* Language and interface selection stay available in both scene variants. */
.header-controls {
  display:grid;
  grid-template-columns:auto auto;
  gap:4px 10px;
  align-items:start;
}
.interface-choice { grid-column:1; grid-row:1; }
.language-choice { grid-column:2; grid-row:1; }
#language { width:60px; padding-left:8px; padding-right:18px; }
#connection { grid-column:1 / -1; justify-self:end; }
@media(max-width:600px) {
  .header-controls { gap:3px 6px; }
  .interface-choice select { width:142px; }
  #language { width:52px; }
}
@media(max-width:370px) {
  .interface-choice select { width:120px; }
  #language { width:48px; }
  .brand svg { display:none; }
}
/* Leave room for the native select arrow without clipping the DE/EN code. */
#language { padding:6px; width:64px; }
@media(max-width:600px) { #language { width:56px; } }
@media(max-width:370px) { #language { width:52px; } }
.cartesian-inputs { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; margin:8px 0 12px; }
.cartesian-inputs input { display:block; margin-top:4px; }

/* Small screens can devote the full viewport to the existing live scene. */
.viewport-toggle { display:none; }
@media (max-width:1024px), (max-height:600px) {
  body:not(.classic) .viewport-toggle {
    position:absolute;
    top:max(12px,env(safe-area-inset-top));
    right:max(12px,env(safe-area-inset-right));
    z-index:3;
    display:inline-flex;
    align-items:center;
    gap:6px;
    max-width:calc(100% - 24px);
    min-height:44px;
    padding:8px 12px;
    font-size:12px;
    background:rgba(247,248,246,.95);
    box-shadow:0 2px 12px #0003
  }
  .viewport-toggle svg { flex-shrink:0; }
  body:not(.classic).controls-collapsed { grid-template-rows:minmax(0,1fr); }
  .controls-collapsed .app-header,.controls-collapsed .sidebar { display:none; }
  .controls-collapsed .workspace {
    grid-template-columns:minmax(0,1fr);
    grid-template-rows:minmax(0,1fr)
  }
  .controls-collapsed .model-stage { grid-column:1; grid-row:1; }
  .controls-collapsed .viewport-toggle svg { transform:rotate(180deg); }
}
@media (orientation:landscape) {
  .viewport-toggle svg { transform:rotate(90deg); }
  .controls-collapsed .viewport-toggle svg { transform:rotate(-90deg); }
}