/* ==========================================================================
   Bé Tô Màu — giao diện lưới tranh & công cụ tô màu
   ========================================================================== */

:root {
	--bt-primary: #ff6b6b;
	--bt-primary-dark: #e8474b;
	--bt-accent: #ffd166;
	--bt-blue: #4dabf7;
	--bt-green: #51cf66;
	--bt-purple: #9775fa;
	--bt-ink: #2b2d42;
	--bt-muted: #6b7280;
	--bt-line: #ffe3e3;
	--bt-bg: #fff9f5;
	--bt-card: #ffffff;
	--bt-radius: 20px;
	--bt-shadow: 0 6px 20px rgba(43, 45, 66, .08);
	--bt-shadow-hover: 0 12px 30px rgba(43, 45, 66, .16);
}

/* ------------------------------------------------------------- Lưới tranh */

.betomau-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
	gap: 22px;
	margin: 24px 0;
}

.betomau-card {
	background: var(--bt-card);
	border-radius: var(--bt-radius);
	box-shadow: var(--bt-shadow);
	overflow: hidden;
	transition: transform .18s ease, box-shadow .18s ease;
	display: flex;
	flex-direction: column;
}

.betomau-card:hover,
.betomau-card:focus-within {
	transform: translateY(-4px);
	box-shadow: var(--bt-shadow-hover);
}

.betomau-card__link {
	text-decoration: none;
	color: inherit;
	display: block;
}

.betomau-card__media {
	position: relative;
	aspect-ratio: 1 / 1;
	background: #fff;
	display: flex;
	align-items: center;
	justify-content: center;
	overflow: hidden;
	border-bottom: 2px dashed var(--bt-line);
}

.betomau-card__media img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	padding: 8px;
	box-sizing: border-box;
}

.betomau-card__placeholder {
	font-size: 46px;
}

.betomau-card__badge {
	position: absolute;
	inset: auto 10px 10px auto;
	background: var(--bt-primary);
	color: #fff;
	font-size: 12px;
	font-weight: 700;
	padding: 4px 10px;
	border-radius: 999px;
	opacity: 0;
	transform: translateY(6px);
	transition: .18s ease;
}

.betomau-card:hover .betomau-card__badge {
	opacity: 1;
	transform: none;
}

.betomau-card__title {
	font-size: 15px;
	line-height: 1.35;
	margin: 12px 14px 4px;
	font-weight: 700;
	color: var(--bt-ink);
}

.betomau-card__meta {
	margin: 0 14px 14px;
	font-size: 12.5px;
	color: var(--bt-muted);
}

.betomau-card__meta a {
	color: var(--bt-muted);
	text-decoration: none;
}

.betomau-card__meta a:hover {
	color: var(--bt-primary);
}

.betomau-empty {
	background: #fff;
	border: 2px dashed var(--bt-line);
	border-radius: var(--bt-radius);
	padding: 32px;
	text-align: center;
	color: var(--bt-muted);
}

/* ---------------------------------------------------------------- Chủ đề */

.betomau-topics {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
	gap: 18px;
	margin: 24px 0;
}

.betomau-topic {
	background: var(--bt-card);
	border-radius: var(--bt-radius);
	box-shadow: var(--bt-shadow);
	padding: 14px;
	text-align: center;
	text-decoration: none;
	color: var(--bt-ink);
	transition: transform .18s ease, box-shadow .18s ease;
}

.betomau-topic:hover {
	transform: translateY(-4px) rotate(-1deg);
	box-shadow: var(--bt-shadow-hover);
}

.betomau-topic__media {
	display: block;
	aspect-ratio: 1 / 1;
	background: var(--bt-bg);
	border-radius: 14px;
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	margin-bottom: 10px;
}

.betomau-topic__media img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	padding: 6px;
	box-sizing: border-box;
}

.betomau-topic__placeholder {
	font-size: 40px;
}

.betomau-topic__name {
	display: block;
	font-weight: 700;
	font-size: 15px;
}

.betomau-topic__count {
	display: block;
	font-size: 12.5px;
	color: var(--bt-muted);
	margin-top: 2px;
}

/* ------------------------------------------------------- Công cụ tô màu */

.betomau-studio {
	background: var(--bt-card);
	border-radius: 24px;
	box-shadow: var(--bt-shadow);
	padding: 14px;
	margin: 24px 0;
}

.betomau-studio__toolbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px;
	padding: 10px;
	background: var(--bt-bg);
	border-radius: 16px;
	margin-bottom: 14px;
}

.betomau-tool {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	border: 2px solid transparent;
	background: #fff;
	border-radius: 12px;
	padding: 9px 13px;
	font: inherit;
	font-size: 14px;
	font-weight: 600;
	color: var(--bt-ink);
	cursor: pointer;
	box-shadow: 0 2px 6px rgba(43, 45, 66, .07);
	transition: .15s ease;
}

.betomau-tool:hover:not(:disabled) {
	transform: translateY(-2px);
	border-color: var(--bt-primary);
}

.betomau-tool.is-active {
	background: var(--bt-primary);
	border-color: var(--bt-primary-dark);
	color: #fff;
}

.betomau-tool--primary {
	background: var(--bt-green);
	color: #fff;
}

.betomau-tool:disabled {
	opacity: .45;
	cursor: not-allowed;
}

.betomau-tool__label {
	white-space: nowrap;
}

.betomau-toolbar__sep {
	width: 2px;
	height: 26px;
	background: var(--bt-line);
	border-radius: 2px;
}

.betomau-toolbar__spacer {
	flex: 1 1 auto;
}

.betomau-size {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-size: 13px;
	font-weight: 600;
	color: var(--bt-muted);
}

.betomau-size input {
	width: 110px;
	accent-color: var(--bt-primary);
}

/* --------------------------------------------------------- Thanh kiểu bút */

.betomau-brushbar {
	display: flex;
	align-items: center;
	gap: 6px;
	flex-wrap: wrap;
	padding: 8px 10px;
	background: #fff;
	border: 2px dashed var(--bt-line);
	border-radius: 14px;
	margin-bottom: 14px;
}

.betomau-brushbar__label {
	font-size: 13px;
	font-weight: 700;
	color: var(--bt-muted);
	margin-right: 2px;
}

.betomau-brush {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	border: 2px solid var(--bt-line);
	background: #fff;
	border-radius: 10px;
	padding: 7px 11px;
	font: inherit;
	font-size: 13.5px;
	font-weight: 600;
	color: var(--bt-ink);
	cursor: pointer;
	transition: .15s ease;
}

.betomau-brush:hover {
	border-color: var(--bt-purple);
	transform: translateY(-2px);
}

.betomau-brush.is-active {
	background: var(--bt-purple);
	border-color: var(--bt-purple);
	color: #fff;
}

.betomau-brush__icon {
	font-size: 15px;
	line-height: 1;
}

.betomau-studio__body {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 232px;
	gap: 16px;
	align-items: start;
}

.betomau-stage {
	position: relative;
	width: 100%;
	background:
		linear-gradient(45deg, #f6f6f6 25%, transparent 25%, transparent 75%, #f6f6f6 75%) 0 0 / 24px 24px,
		linear-gradient(45deg, #f6f6f6 25%, #fff 25%, #fff 75%, #f6f6f6 75%) 12px 12px / 24px 24px;
	border-radius: 18px;
	border: 2px solid var(--bt-line);
	overflow: hidden;
	touch-action: none;
}

.betomau-stage__viewport {
	position: relative;
	width: 100%;
	transform-origin: center center;
	will-change: transform;
}

.betomau-stage__layer {
	display: block;
	width: 100%;
	height: auto;
}

.betomau-stage__lines,
.betomau-stage__preview,
.betomau-stage__decor {
	position: absolute;
	inset: 0;
	pointer-events: none;
	width: 100%;
	height: 100%;
}

.betomau-stage[data-tool="fill"] .betomau-stage__color {
	cursor: cell;
}

.betomau-stage[data-tool="brush"] .betomau-stage__color,
.betomau-stage[data-tool="eraser"] .betomau-stage__color {
	cursor: crosshair;
}

.betomau-stage[data-tool="text"] .betomau-stage__color {
	cursor: text;
}

.betomau-stage[data-tool="pan"] .betomau-stage__color {
	cursor: grab;
}

.betomau-stage[data-tool="pan"] .betomau-stage__color:active {
	cursor: grabbing;
}

.betomau-zoom {
	min-width: 52px;
	text-align: center;
	font-size: 13px;
	font-weight: 700;
	color: var(--bt-muted);
}

.betomau-stage__loading {
	position: absolute;
	inset: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 10px;
	background: #fff;
	color: var(--bt-muted);
	font-weight: 600;
}

.betomau-stage__loading.is-error {
	color: var(--bt-primary-dark);
}

.betomau-spinner {
	width: 34px;
	height: 34px;
	border: 4px solid var(--bt-line);
	border-top-color: var(--bt-primary);
	border-radius: 50%;
	animation: betomau-spin .8s linear infinite;
}

@keyframes betomau-spin {
	to { transform: rotate(360deg); }
}

/* ------------------------------------------------------------ Bảng màu */

.betomau-palette {
	background: var(--bt-bg);
	border-radius: 18px;
	padding: 12px;
}

.betomau-palette__current {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 12px;
}

.betomau-palette__swatch {
	width: 44px;
	height: 44px;
	border-radius: 12px;
	border: 3px solid #fff;
	box-shadow: 0 2px 8px rgba(43, 45, 66, .18);
	flex: none;
}

.betomau-palette__picker {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 13px;
	font-weight: 600;
	color: var(--bt-muted);
	cursor: pointer;
}

.betomau-palette__picker input {
	width: 34px;
	height: 34px;
	padding: 0;
	border: none;
	background: none;
	cursor: pointer;
}

.betomau-palette__sets {
	display: flex;
	flex-wrap: wrap;
	gap: 5px;
	margin-bottom: 10px;
}

.betomau-set {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	border: 2px solid transparent;
	background: #fff;
	border-radius: 999px;
	padding: 5px 11px;
	font: inherit;
	font-size: 12.5px;
	font-weight: 600;
	color: var(--bt-ink);
	cursor: pointer;
	transition: .15s ease;
}

.betomau-set:hover {
	border-color: var(--bt-blue);
}

.betomau-set.is-active {
	background: var(--bt-ink);
	color: #fff;
}

.betomau-palette__grid {
	display: none;
	grid-template-columns: repeat(6, 1fr);
	gap: 6px;
}

.betomau-palette__grid.is-active {
	display: grid;
}

.betomau-swatch {
	aspect-ratio: 1 / 1;
	border: 2px solid rgba(255, 255, 255, .8);
	border-radius: 8px;
	cursor: pointer;
	padding: 0;
	transition: transform .12s ease, box-shadow .12s ease;
	box-shadow: 0 1px 3px rgba(43, 45, 66, .18);
}

.betomau-swatch:hover {
	transform: scale(1.15);
	z-index: 1;
}

.betomau-swatch.is-active {
	border-color: var(--bt-ink);
	transform: scale(1.12);
}

/* ------------------------------------------------------- Bảng trang trí */

.betomau-decor {
	margin-top: 16px;
	padding: 14px;
	background: var(--bt-bg);
	border-radius: 18px;
	border: 2px dashed var(--bt-line);
}

.betomau-decor__title {
	margin: 0 0 12px;
	font-size: 16px;
	font-weight: 800;
	color: var(--bt-ink);
}

.betomau-decor__row {
	display: flex;
	align-items: flex-start;
	gap: 10px;
	flex-wrap: wrap;
	margin-bottom: 12px;
}

.betomau-decor__label {
	flex: none;
	min-width: 84px;
	padding-top: 8px;
	font-size: 13px;
	font-weight: 700;
	color: var(--bt-muted);
}

.betomau-frames,
.betomau-text {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
	flex: 1 1 320px;
	align-items: center;
}

.betomau-frame {
	display: inline-flex;
	align-items: center;
	gap: 5px;
	border: 2px solid var(--bt-line);
	background: #fff;
	border-radius: 10px;
	padding: 7px 11px;
	font: inherit;
	font-size: 13px;
	font-weight: 600;
	color: var(--bt-ink);
	cursor: pointer;
	transition: .15s ease;
}

.betomau-frame:hover {
	border-color: var(--bt-accent);
	transform: translateY(-2px);
}

.betomau-frame.is-active {
	background: var(--bt-accent);
	border-color: #e6b800;
	color: var(--bt-ink);
}

.betomau-frame__icon {
	font-size: 15px;
	line-height: 1;
}

.betomau-text__input {
	flex: 1 1 200px;
	min-width: 160px;
	border: 2px solid var(--bt-line);
	border-radius: 10px;
	padding: 9px 12px;
	font: inherit;
	font-size: 14px;
	background: #fff;
	color: var(--bt-ink);
}

.betomau-text__input:focus {
	outline: none;
	border-color: var(--bt-blue);
}

.betomau-text__font {
	border: 2px solid var(--bt-line);
	border-radius: 10px;
	padding: 8px 10px;
	font: inherit;
	font-size: 13.5px;
	background: #fff;
	color: var(--bt-ink);
	cursor: pointer;
}

.betomau-text__size {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	font-size: 13px;
	font-weight: 600;
	color: var(--bt-muted);
}

.betomau-text__size input {
	width: 100px;
	accent-color: var(--bt-purple);
}

.betomau-decor__hint {
	margin: 0;
	font-size: 13px;
	color: var(--bt-muted);
}

.betomau-studio__hint {
	margin: 12px 4px 2px;
	font-size: 13.5px;
	color: var(--bt-muted);
}

/* ----------------------------------------------------------- Responsive */

@media (max-width: 860px) {
	.betomau-studio__body {
		grid-template-columns: 1fr;
	}

	.betomau-palette__grid {
		grid-template-columns: repeat(12, 1fr);
	}
}

@media (max-width: 600px) {
	.betomau-grid {
		grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
		gap: 14px;
	}

	.betomau-tool__label {
		display: none;
	}

	.betomau-tool {
		padding: 10px 12px;
		font-size: 18px;
	}

	.betomau-size input {
		width: 80px;
	}

	.betomau-size__label {
		display: none;
	}

	.betomau-palette__grid {
		grid-template-columns: repeat(10, 1fr);
	}

	.betomau-brush__name,
	.betomau-brushbar__label {
		display: none;
	}

	.betomau-brush {
		padding: 9px 12px;
	}

	.betomau-brush__icon {
		font-size: 19px;
	}

	.betomau-brushbar {
		justify-content: space-between;
	}

	.betomau-frame__name {
		display: none;
	}

	.betomau-frame {
		padding: 9px 12px;
	}

	.betomau-frame__icon {
		font-size: 19px;
	}

	.betomau-decor__label {
		min-width: 0;
		padding-top: 0;
		flex-basis: 100%;
	}
}

@media print {
	.betomau-studio__toolbar,
	.betomau-brushbar,
	.betomau-palette,
	.betomau-decor,
	.betomau-studio__hint {
		display: none !important;
	}
}