.rb-stage{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line,#e6dccd);touch-action:none}
.rb-stage[data-bg="checker"]{background-color:#fff;background-image:linear-gradient(45deg,#ddd 25%,transparent 25%),linear-gradient(-45deg,#ddd 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ddd 75%),linear-gradient(-45deg,transparent 75%,#ddd 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}
.rb-stage[data-bg="white"]{background:#fff}
.rb-stage canvas{display:block;max-width:100%;max-height:70vh;width:auto;height:auto;margin:0 auto;cursor:crosshair;touch-action:none}
.rb-toolbar{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin:.75rem 0}
.rb-toolbar [aria-pressed="true"]{outline:2px solid currentColor}
.rb-bg-options{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}
.rb-item-button{background:none;border:0;padding:0;font:inherit;font-weight:600;text-align:left;cursor:pointer;color:inherit}
.rb-item-button:disabled{cursor:default}
.batch-item.is-selected{outline:2px solid var(--accent,#c56a2d);border-radius:10px}
.rb-progress{width:100%}

.rb-gpu-error { margin-top: .75rem; font-size: .875rem; }
.rb-gpu-error textarea { width: 100%; font-family: ui-monospace, monospace; font-size: .75rem; margin-top: .5rem; box-sizing: border-box; }