:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --line: #e2e5ea;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --danger: #dc2626;
  --font: 'Kantumruy Pro', 'Khmer OS', 'Leelawadee UI', sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font-family: var(--font); color: var(--text); background: var(--bg); font-size: 14px; }
button, .btn, input { font-family: inherit; font-size: 14px; }
button, .btn {
  min-height: 36px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--text); cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 4px; white-space: nowrap;
}
button:hover, .btn:hover { border-color: #b8c0cc; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--danger); }
input { width: 100%; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; }
label { display: block; margin: 6px 0; color: var(--muted); font-size: 13px; }
label.btn { color: var(--text); font-size: 14px; }
h3 { margin: 0 0 8px; font-size: 15px; }
h4 { margin: 12px 0 6px; font-size: 13px; color: var(--muted); }
.row { display: flex; gap: 6px; flex-wrap: wrap; }
.row > label { flex: 1; }
[hidden] { display: none !important; }
.inline-check { display: flex; align-items: center; gap: 8px; min-height: 44px; }
.inline-check input { width: 18px; height: 18px; }

/* ---------- editor layout ---------- */
body.editor { display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  display: flex; gap: 8px; align-items: center; padding: 8px 12px;
  background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap;
}
.plan-name { width: 220px; font-weight: 700; font-size: 16px; border-color: transparent; }
.plan-name:hover, .plan-name:focus { border-color: var(--line); }
.top-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.layout { flex: 1; display: grid; grid-template-columns: 230px 1fr 260px; min-height: 0; }
.palette, .side { background: var(--panel); overflow-y: auto; padding: 12px; }
.palette { border-right: 1px solid var(--line); }
.side { border-left: 1px solid var(--line); }
.side section { padding-bottom: 12px; margin-bottom: 12px; border-bottom: 1px solid var(--line); }
.tools { display: flex; flex-direction: column; gap: 6px; }
.tool.active, .stamp.active, .floor-tabs .active { border-color: var(--accent); background: #eff6ff; color: var(--accent); }
.hint { color: var(--muted); font-size: 12px; margin: 12px 0 0; }
.stamp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.stamp { flex-direction: column; height: auto; padding: 6px 4px; font-size: 12px; white-space: normal; text-align: center; }
.stamp-icon { width: 44px; height: 32px; pointer-events: none; }
.stamp-icon .plan-text { display: none; }
.floor-tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 8px; }
.check-results { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-direction: column; gap: 4px; }
.check-results button { white-space: normal; text-align: left; height: auto; color: #b45309; font-size: 13px; width: 100%; }
.check-results .ok { color: #15803d; }
.status { color: #15803d; font-size: 13px; min-height: 20px; }
.status.error { color: var(--danger); }

.canvas-wrap { overflow: auto; padding: 24px; background: #e9ecf1; }
#canvas { background: #fff; display: block; box-shadow: 0 1px 4px rgba(0,0,0,.12); touch-action: none; user-select: none; }
#canvas.drawing { cursor: crosshair; }
#canvas .item { cursor: move; }
#canvas.drawing .item { cursor: crosshair; }
.grid-minor { stroke: #eef1f5; stroke-width: 1; }
.grid-major { stroke: #d9dee6; stroke-width: 1; }
.plan-text { font-family: var(--font); pointer-events: none; }
.sel-box { fill: none; stroke: var(--accent); stroke-width: 2; stroke-dasharray: 5 3; pointer-events: none; }
.sel-handle { fill: #fff; stroke: var(--accent); stroke-width: 2; cursor: nwse-resize; }
.draw-preview { fill: rgba(37,99,235,.12); stroke: var(--accent); stroke-width: 2; stroke-dasharray: 4 3; }

/* Editor needs a mouse; on small screens point people to the viewer */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: auto 1fr auto; overflow-y: auto; }
  .palette, .side { border: 0; max-height: none; }
}
.cloud-state { font-size: 13px; color: #15803d; align-self: center; }
.cloud-state.dirty { color: #b45309; }
.login-dialog { border: 1px solid var(--line); border-radius: 12px; padding: 20px; width: min(360px, calc(100vw - 32px)); }
.login-dialog::backdrop { background: rgba(0, 0, 0, .35); }
.login-dialog h3 { margin: 0 0 8px; }
.login-dialog input { width: 100%; min-height: 44px; }
.room-labels { pointer-events: none; }
body.editor .room-label, body.editor .room-label * { pointer-events: auto; cursor: move; }
.label-pos { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: 12px; color: var(--muted); margin: 2px 0 6px; }
.color-row { display: flex; gap: 6px; flex-wrap: wrap; margin: 4px 0 8px; }
.swatch { width: 28px; height: 28px; min-height: 28px; padding: 0; border-radius: 50%; border: 2px solid; }
.swatch.active { box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--accent); }