/* Layout: full-bleed stage (2D plan + 3D diorama) with frosted-glass overlays: header on top, tool rail left, inspector right. Clean white. */
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 13.5px;
  overflow: hidden;
}
button,
input,
select {
  font: inherit;
  color: inherit;
}
select {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 5px 28px 5px 10px;
  font-weight: 600;
  background-color: var(--field);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='none' stroke='%238a93a3' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
  max-width: 100%;
}
select:hover {
  background-color: var(--hover);
}
select:focus-visible {
  border-color: var(--focus);
}
option {
  background: var(--bg);
  color: var(--ink);
}
button {
  cursor: pointer;
  transition:
    background-color 0.15s,
    transform 0.12s,
    box-shadow 0.15s;
}
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.app {
  position: relative;
  height: 100%;
  overflow: hidden;
  --ri: 316px;
  --r2: 0px;
}
.glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(22px) saturate(1.6);
  backdrop-filter: blur(22px) saturate(1.6);
  border: 1px solid var(--glass-line);
  box-shadow: var(--shadow);
}
/* stage */
.stage {
  position: absolute;
  inset: 0;
  display: grid;
}
.stage[data-view='split'] {
  grid-template-columns: 44% 56%;
}
.stage[data-view='2d'] .p3d,
.stage[data-view='3d'] .p2d {
  display: none;
}
.pane {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.p2d {
  background: var(--paper);
}
.p3d {
  background: #d9edf8;
  border-left: 1px solid var(--edge);
}
.stage[data-view='3d'] .p3d,
.stage[data-view='2d'] .p2d {
  border: 0;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}
#c2d {
  cursor: crosshair;
}
/* header */
.top {
  position: absolute;
  z-index: 30;
  top: 14px;
  left: max(16px, env(safe-area-inset-left, 0px));
  right: max(16px, env(safe-area-inset-right, 0px));
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 14px;
  border-radius: 22px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand svg {
  width: 26px;
  height: 26px;
}
.pname {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 6px 10px;
  font-weight: 600;
  min-width: 0;
  width: 190px;
  max-width: 100%;
}
.pname:hover {
  border-color: var(--line);
}
.pname:focus {
  border-color: var(--focus);
  outline: none;
  background: var(--field);
}
.spacer {
  flex: 1;
}
.seg {
  display: inline-flex;
  background: var(--hover);
  border-radius: 14px;
  padding: 3px;
  gap: 2px;
}
.seg button {
  border: 0;
  background: transparent;
  padding: 6px 13px;
  border-radius: 11px;
  font-weight: 600;
  color: var(--muted);
}
.seg button:hover {
  color: var(--ink);
}
.seg button[aria-pressed='true'] {
  background: var(--sel);
  color: var(--sel-ink);
}
.ibtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--field);
  border-radius: 13px;
  padding: 7px 12px;
  font-weight: 600;
}
.ibtn:hover {
  background: var(--hover);
}
.ibtn:disabled {
  opacity: 0.4;
  cursor: default;
}
.ibtn[aria-pressed='true'] {
  background: var(--sel);
  color: var(--sel-ink);
  border-color: var(--sel);
}
.ibtn svg {
  width: 16px;
  height: 16px;
}
.menuwrap {
  position: relative;
}
.menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
  backdrop-filter: blur(24px) saturate(1.6);
  border: 1px solid var(--glass-line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 6px;
  min-width: 210px;
  display: flex;
  flex-direction: column;
}
.menu button {
  border: 0;
  background: transparent;
  text-align: left;
  padding: 9px 12px;
  border-radius: 11px;
  font-weight: 600;
}
.menu button:hover {
  background: var(--hover);
}
/* tool rail */
.tools {
  position: absolute;
  z-index: 20;
  left: max(16px, env(safe-area-inset-left, 0px));
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-radius: 22px;
  padding: 8px;
  width: 68px;
  max-height: calc(100% - 100px);
  overflow: auto;
}
.tool {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  border: 0;
  background: transparent;
  border-radius: 15px;
  padding: 9px 2px 7px;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--muted);
}
.tool svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.tool:hover {
  background: var(--hover);
  color: var(--ink);
}
.tool[aria-pressed='true'] {
  background: var(--sel);
  color: var(--sel-ink);
}