#canvas_id {
	max-width: 100%;
	height: auto;
	touch-action: none;
}

.bk-canvas-zoom-viewport {
	position: relative;
	overflow: hidden;
	max-width: 100%;
	margin: 0 auto;
	line-height: 0;
}

/* image-wrapperの左右余白をViewportの幅計算に含めないための内側要素。 */
.bk-canvas-viewport-host {
	width: 100%;
	margin: 0;
	padding: 0;
}

.bk-canvas-zoom-stage {
	position: relative;
	transform-origin: 0 0;
	will-change: transform;
}

.bk-canvas-pan-mode {
	touch-action: none;
}

.bk-zoom-toolbar {
	margin-top: 5px;
	padding: 8px 10px;
	background: #eee;
	text-align: center;
}

.bk-canvas-mode-toolbar {
	margin-top: 1px;
	padding: 8px 10px;
	background: #eee;
	text-align: center;
}

.bk-zoom-controls {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	max-width: 100%;
}

.bk-canvas-mode-controls {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	max-width: 100%;
}

.bk-zoom-icon {
	min-width: 44px;
}

.bk-zoom-value {
	min-width: 58px;
	padding: 6px 8px;
	border: 1px solid #ccc;
	border-radius: 4px;
	background: #fff;
	color: #555;
	line-height: 20px;
	text-align: center;
}

.bk-zoom-pan.active {
	border-color: #286090;
	background: #337ab7;
	color: #fff;
}

.bk-zoom-status {
	margin-top: 5px;
	padding: 9px 12px;
	border-left: 4px solid #337ab7;
	background: #d9edf7;
	color: #245580;
	line-height: 1.5;
}

.bk-zoom-status .fa {
	margin-right: 4px;
}

@media (max-width: 480px) {
	.bk-zoom-controls {
		gap: 4px;
	}

	.bk-canvas-mode-controls {
		gap: 4px;
	}

	.bk-zoom-icon {
		min-width: 40px;
	}

	.bk-zoom-pan {
		padding-right: 7px;
		padding-left: 7px;
	}
}

@media (max-width: 420px) {
	.bk-canvas-mode-controls {
		display: flex;
		flex-wrap: wrap;
		justify-content: center;
	}

	.bk-canvas-mode-controls .bk-zoom-pan {
		flex-basis: 100%;
	}

	.bk-canvas-mode-controls #mode_erase,
	.bk-canvas-mode-controls #mode_restore {
		flex: 1 1 0;
	}
}

#parameter0_range {
	--bk-brush-slider-size: 20px;
	height: 42px;
	padding: 0;
	background: transparent;
	-webkit-appearance: none;
	appearance: none;
}

#parameter0_range::-webkit-slider-runnable-track {
	height: 8px;
	border-radius: 999px;
	background: #ddd;
}

#parameter0_range::-webkit-slider-thumb {
	width: var(--bk-brush-slider-size);
	height: var(--bk-brush-slider-size);
	margin-top: calc((8px - var(--bk-brush-slider-size)) / 2);
	border: 2px solid #fff;
	border-radius: 50%;
	background: #337ab7;
	box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
	-webkit-appearance: none;
	appearance: none;
}

#parameter0_range::-moz-range-track {
	height: 8px;
	border: 0;
	border-radius: 999px;
	background: #ddd;
}

#parameter0_range::-moz-range-thumb {
	width: var(--bk-brush-slider-size);
	height: var(--bk-brush-slider-size);
	border: 2px solid #fff;
	border-radius: 50%;
	background: #337ab7;
	box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
}

.bk-history-toolbar {
	margin-top: 5px;
	padding: 10px 0;
	background: #eee;
}

.bk-history-button {
	height: 50px;
}

.bk-history-button .fa {
	margin-right: 6px;
}

.bk-drawing-mode {
	height: auto;
	padding: 6px;
}

.bk-drawing-mode .btn {
	min-width: 110px;
}