.tool-background-remover .bgr { width: 100%; max-width: 1180px; margin: 0 auto; color: var(--fg); font-size: 15px; line-height: 1.45; }
.tool-background-remover .bgr *, .tool-background-remover .bgr *::before, .tool-background-remover .bgr *::after { box-sizing: border-box; }
.tool-background-remover [hidden] { display: none !important; }
.tool-background-remover .bgr-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.tool-background-remover .bgr-note { margin: 0 0 12px; padding: 10px 12px; border: 1px solid var(--border); border-left: 4px solid var(--accent); background: var(--surface); border-radius: var(--radius); }
.tool-background-remover .bgr-note.is-warn { border-left-color: var(--danger); }

/* buttons */
.tool-background-remover .bgr-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 40px; padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2); color: var(--fg); font: inherit; font-weight: 600; cursor: pointer; text-align: center; touch-action: manipulation; }
.tool-background-remover .bgr-btn:hover:not(:disabled) { border-color: var(--accent); }
.tool-background-remover .bgr-btn:disabled { opacity: .5; cursor: not-allowed; }
.tool-background-remover .bgr-btn-primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.tool-background-remover .bgr-btn-primary:hover:not(:disabled) { filter: brightness(1.08); }
.tool-background-remover .bgr-sm { min-height: 36px; padding: 6px 10px; font-weight: 500; }
.tool-background-remover .bgr button:focus-visible, .tool-background-remover .bgr input:focus-visible + label, .tool-background-remover .bgr label.bgr-btn:focus-within, .tool-background-remover .bgr select:focus-visible, .tool-background-remover .bgr input[type=range]:focus-visible, .tool-background-remover .bgr input[type=color]:focus-visible, .tool-background-remover .bgr-stage:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.tool-background-remover .bgr-sr:focus-visible + .bgr-btn { outline: 3px solid var(--accent); outline-offset: 2px; }

/* drop zone */
.tool-background-remover .bgr-drop { display: flex; align-items: center; justify-content: center; min-height: 300px; padding: 24px 16px; border: 2px dashed var(--border); border-radius: var(--radius); background: var(--surface); text-align: center; transition: border-color .15s, background .15s; }
.tool-background-remover .bgr-drop.is-over { border-color: var(--accent); background: var(--surface-2); }
.tool-background-remover .bgr-drop-in { max-width: 520px; }
.tool-background-remover .bgr-drop-t { margin: 0 0 12px; font-size: 20px; font-weight: 700; }
.tool-background-remover .bgr-drop-s { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

/* layout */
.tool-background-remover .bgr-app { display: flex; flex-direction: column; gap: 0; }
.tool-background-remover .bgr-right { display: contents; }
.tool-background-remover .bgr-c-q { order: 1; } .tool-background-remover .bgr-left { order: 2; margin-bottom: 12px; } .tool-background-remover .bgr-c-s { order: 3; } .tool-background-remover .bgr-c-d { order: 4; }
@media (min-width: 900px) {
  .tool-background-remover .bgr-app { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 0 14px; align-items: start; }
  .tool-background-remover .bgr-left { grid-column: 1; grid-row: 1 / span 3; margin: 0; }
  .tool-background-remover .bgr-right { display: block; grid-column: 2; grid-row: 1 / span 3; }
  .tool-background-remover .bgr-c-q, .tool-background-remover .bgr-c-s, .tool-background-remover .bgr-c-d { order: 0; }
}
.tool-background-remover .bgr-left, .tool-background-remover .bgr-right { min-width: 0; }
.tool-background-remover .bgr-card { margin: 0 0 12px; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.tool-background-remover .bgr-h { margin: 0 0 10px; font-size: 15px; font-weight: 700; }
.tool-background-remover .bgr-h2 { margin-top: 16px; }
.tool-background-remover .bgr-count { color: var(--muted); font-weight: 400; }
.tool-background-remover .bgr-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
.tool-background-remover .bgr-small { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

/* toolbar */
.tool-background-remover .bgr-bar { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin-bottom: 8px; }
.tool-background-remover .bgr-grp { display: flex; gap: 6px; margin-left: auto; }
.tool-background-remover .bgr-seg { display: inline-flex; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
.tool-background-remover .bgr-seg-wrap { display: flex; flex-wrap: wrap; }
.tool-background-remover .bgr-tool, .tool-background-remover .bgr-bgb { min-height: 38px; padding: 6px 12px; border: 0; background: transparent; color: var(--fg); font: inherit; cursor: pointer; touch-action: manipulation; }
.tool-background-remover .bgr-seg-wrap .bgr-bgb { flex: 1 1 auto; }
.tool-background-remover .bgr-tool + .bgr-tool, .tool-background-remover .bgr-bgb + .bgr-bgb { border-left: 1px solid var(--border); }
.tool-background-remover .bgr-tool.is-on, .tool-background-remover .bgr-bgb.is-on { background: var(--accent); color: var(--accent-fg); font-weight: 700; }
.tool-background-remover .bgr-inl { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; }
.tool-background-remover .bgr-inl input[type=range] { width: 120px; }

/* stage */
.tool-background-remover .bgr-stage { position: relative; width: 100%; height: min(62vh, 620px); min-height: 280px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2); touch-action: none; user-select: none; -webkit-user-select: none; }
.tool-background-remover .bgr-stage[data-tool=compare] { cursor: ew-resize; }
.tool-background-remover .bgr-stage[data-tool=pan] { cursor: grab; }
.tool-background-remover .bgr-stage[data-tool=restore], .tool-background-remover .bgr-stage[data-tool=erase] { cursor: none; }
.tool-background-remover .bgr-view { position: absolute; left: 0; top: 0; transform-origin: 0 0; will-change: transform; }
.tool-background-remover .bgr-cv, .tool-background-remover .bgr-checker { position: absolute; left: 0; top: 0; width: 100%; height: 100%; display: block; }
.tool-background-remover .bgr-checker { background-color: #fff; background-image: conic-gradient(#c9ccd3 25%, transparent 0 50%, #c9ccd3 0 75%, transparent 0); background-size: 20px 20px; }
.tool-background-remover .bgr-ov { pointer-events: none; opacity: .55; }
.tool-background-remover .bgr-line { position: absolute; top: 0; bottom: 0; width: 3px; margin-left: -1px; background: #fff; box-shadow: 0 0 0 1px rgba(0, 0, 0, .55); pointer-events: none; }
.tool-background-remover .bgr-busy { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); display: flex; gap: 8px; align-items: center; padding: 6px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--fg); font-size: 13px; pointer-events: none; }
.tool-background-remover .bgr-spin { width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: bgr-spin .8s linear infinite; }
@keyframes bgr-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .tool-background-remover .bgr-spin { animation-duration: 3s; } }
.tool-background-remover .bgr-cursor { position: absolute; pointer-events: none; border: 2px solid #fff; box-shadow: 0 0 0 1px rgba(0, 0, 0, .7); border-radius: 50%; transform: translate(-50%, -50%); }
.tool-background-remover .bgr-cmp { display: flex; align-items: center; gap: 10px; margin-top: 8px; color: var(--muted); font-size: 13px; }
.tool-background-remover .bgr-cmp input { flex: 1 1 auto; min-width: 0; }

/* queue */
.tool-background-remover .bgr-queue { list-style: none; margin: 0; padding: 0; max-height: 240px; overflow: auto; display: flex; flex-direction: column; gap: 6px; }
.tool-background-remover .bgr-q { display: flex; align-items: center; gap: 8px; padding: 4px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2); }
.tool-background-remover .bgr-q.is-cur { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.tool-background-remover .bgr-q-sel { display: flex; flex: 1 1 auto; min-width: 0; align-items: center; gap: 8px; padding: 0; border: 0; background: transparent; color: var(--fg); font: inherit; text-align: left; cursor: pointer; min-height: 44px; }
.tool-background-remover .bgr-q-th { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 6px; background-color: #fff; background-image: conic-gradient(#c9ccd3 25%, transparent 0 50%, #c9ccd3 0 75%, transparent 0); background-size: 10px 10px; object-fit: contain; }
.tool-background-remover .bgr-q-n { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.tool-background-remover .bgr-q-s { display: block; color: var(--muted); font-size: 12px; }
.tool-background-remover .bgr-q-s.is-err { color: var(--danger); }
.tool-background-remover .bgr-q-s.is-ok { color: var(--ok); }
.tool-background-remover .bgr-q-x { flex: 0 0 36px; width: 36px; height: 36px; border: 0; border-radius: var(--radius); background: transparent; color: var(--muted); font-size: 20px; cursor: pointer; }
.tool-background-remover .bgr-q-x:hover { color: var(--danger); }

/* progress */
.tool-background-remover .bgr-prog { margin-top: 10px; }
.tool-background-remover .bgr-prog-t { margin-bottom: 4px; font-size: 13px; color: var(--muted); }
.tool-background-remover .bgr-prog-bar { height: 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; }
.tool-background-remover .bgr-prog-bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .15s; }

/* settings */
.tool-background-remover .bgr-opt { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 10px; }
.tool-background-remover .bgr-opt .bgr-sl { flex: 1 1 100%; margin-top: 0; }
.tool-background-remover .bgr-sw { display: flex; flex-wrap: wrap; gap: 6px; }
.tool-background-remover .bgr-swb { width: 32px; height: 32px; padding: 0; border: 2px solid var(--border); border-radius: 50%; cursor: pointer; }
.tool-background-remover .bgr-swb.is-on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent); }
.tool-background-remover .bgr-sl { display: block; margin-top: 10px; font-size: 14px; }
.tool-background-remover .bgr-sl output { float: right; color: var(--muted); }
.tool-background-remover .bgr-sl input[type=range] { display: block; width: 100%; margin-top: 4px; }
.tool-background-remover .bgr input[type=range] { accent-color: var(--accent); min-height: 28px; }
.tool-background-remover .bgr input[type=color] { width: 40px; height: 32px; padding: 0; border: 1px solid var(--border); border-radius: 6px; background: transparent; }
.tool-background-remover .bgr select { min-height: 36px; padding: 4px 8px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-2); color: var(--fg); font: inherit; }
.tool-background-remover .bgr-fmt select { display: block; margin-top: 4px; }