.l3clp-packing-page,
.l3clp-packing-page * {
	box-sizing: border-box;
}

.l3clp-packing-page {
	background: #f6f8fb;
	color: #141a22;
	font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	margin-left: calc(50% - 50vw);
	margin-right: calc(50% - 50vw);
	max-width: 100vw;
	overflow-x: clip;
	padding: 18px;
	width: 100vw;
}

.l3clp-packing-page-inner {
	margin: 0 auto;
	width: 100%;
}

.l3clp-packing-page-intro {
	margin: 0 0 14px;
	max-width: 980px;
}

.l3clp-packing-page-heading {
	color: #0f172a;
	font-size: 34px;
	font-weight: 850;
	letter-spacing: 0;
	line-height: 1.12;
	margin: 0 0 8px;
}

.l3clp-packing-page-summary {
	color: #475569;
	font-size: 15px;
	line-height: 1.55;
	margin: 0;
}

.l3clp-packing-app {
	--l3clp-packing-bg: #f6f8fb;
	--l3clp-packing-sidebar: #eef2f6;
	--l3clp-packing-panel: #ffffff;
	--l3clp-packing-text: #141a22;
	--l3clp-packing-muted: #536170;
	--l3clp-packing-line: #cbd5e1;
	--l3clp-packing-accent: #166534;
	--l3clp-packing-accent-2: #2563eb;
	--l3clp-packing-warning-bg: #fff7ed;
	--l3clp-packing-warning-border: #f59e0b;
	--l3clp-packing-danger-bg: #fff1f2;
	--l3clp-packing-danger-border: #e11d48;
	background: var(--l3clp-packing-bg);
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 12px;
	isolation: isolate;
	max-width: 100%;
	overflow: hidden;
	position: relative;
}

.l3clp-packing-layout {
	align-items: stretch;
	display: grid;
	grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
	max-width: 100%;
	min-height: 720px;
	min-width: 0;
}

.l3clp-packing-panel,
.l3clp-packing-preview-panel,
.l3clp-packing-result-panel {
	background: var(--l3clp-packing-panel);
}

.l3clp-packing-input-panel {
	background: var(--l3clp-packing-sidebar);
	border-right: 1px solid var(--l3clp-packing-line);
	max-height: min(900px, calc(100vh - 48px));
	max-width: 100%;
	min-width: 0;
	overflow: auto;
	padding: 22px;
}

.l3clp-packing-output {
	align-items: stretch;
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(310px, 380px);
	max-width: 100%;
	min-width: 0;
}

.l3clp-packing-preview-panel {
	background: var(--l3clp-packing-bg);
	min-height: 720px;
	min-width: 0;
	padding: 24px;
}

.l3clp-packing-result-panel {
	background: var(--l3clp-packing-sidebar);
	border-left: 1px solid var(--l3clp-packing-line);
	display: grid;
	gap: 16px;
	grid-auto-rows: max-content;
	min-height: 720px;
	min-width: 0;
	padding: 22px 18px;
}

.l3clp-packing-panel-head,
.l3clp-packing-drawer-head {
	align-items: start;
	display: flex;
	gap: 12px;
	justify-content: space-between;
	margin-bottom: 14px;
}

.l3clp-packing-panel-head h2,
.l3clp-packing-drawer-head h2 {
	color: #0f172a;
	font-size: 22px;
	font-weight: 850;
	letter-spacing: 0;
	line-height: 1.18;
	margin: 0 0 4px;
}

.l3clp-packing-panel-head p,
.l3clp-packing-drawer-head p {
	color: var(--l3clp-packing-muted);
	font-size: 13px;
	line-height: 1.45;
	margin: 0;
}

.l3clp-packing-fieldset {
	border: 0;
	margin: 22px 0;
	padding: 0;
}

.l3clp-packing-fieldset legend {
	color: #334155;
	font-size: 13px;
	font-weight: 850;
	letter-spacing: 0.08em;
	padding: 0 0 12px;
	text-transform: uppercase;
}

.l3clp-packing-grid {
	display: grid;
	gap: 12px;
}

.l3clp-packing-grid-2 {
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.l3clp-packing-grid-3 {
	grid-template-columns: repeat(3, minmax(0, 1fr));
}

.l3clp-packing-field,
.l3clp-packing-check {
	display: grid;
	gap: 6px;
	min-width: 0;
}

.l3clp-packing-field-wide {
	grid-column: 1 / -1;
	margin-bottom: 12px;
}

.l3clp-packing-label,
.l3clp-packing-field span,
.l3clp-packing-check span {
	color: #172033;
	font-size: 13px;
	font-weight: 750;
	line-height: 1.25;
}

.l3clp-packing-field input,
.l3clp-packing-field select,
.l3clp-packing-app select[data-l3clp-packing-field],
.l3clp-packing-app input[data-l3clp-packing-field] {
	background: #ffffff;
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 8px;
	color: var(--l3clp-packing-text);
	font: inherit;
	font-size: 14px;
	line-height: 1.35;
	min-height: 40px;
	padding: 8px 10px;
	width: 100%;
}

.l3clp-packing-field input:focus,
.l3clp-packing-field select:focus,
.l3clp-packing-app select[data-l3clp-packing-field]:focus,
.l3clp-packing-app input[data-l3clp-packing-field]:focus {
	border-color: var(--l3clp-packing-accent-2);
	box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.13);
	outline: 0;
}

.l3clp-packing-check {
	align-items: center;
	background: #ffffff;
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 8px;
	grid-template-columns: 18px 1fr;
	min-height: 42px;
	padding: 10px;
}

.l3clp-packing-check input {
	height: 16px;
	margin: 0;
	width: 16px;
}

.l3clp-packing-secondary-btn,
.l3clp-packing-primary-btn,
.l3clp-packing-tools button,
.l3clp-packing-transfer-confirm button {
	align-items: center;
	background: #ffffff;
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 8px;
	color: var(--l3clp-packing-text);
	cursor: pointer;
	display: inline-flex;
	font: inherit;
	font-size: 13px;
	font-weight: 800;
	justify-content: center;
	line-height: 1.2;
	min-height: 40px;
	padding: 9px 12px;
	text-align: center;
	text-decoration: none;
}

.l3clp-packing-secondary-btn {
	margin-top: 10px;
	width: 100%;
}

.l3clp-packing-primary-btn,
.l3clp-packing-tools button,
.l3clp-packing-transfer-confirm button[data-l3clp-packing-confirm="continue"] {
	background: var(--l3clp-packing-accent-2);
	border-color: var(--l3clp-packing-accent-2);
	color: #ffffff;
}

.l3clp-packing-primary-btn {
	width: 100%;
}

.l3clp-packing-help {
	color: var(--l3clp-packing-muted);
	font-size: 12px;
	line-height: 1.4;
	margin: 10px 0 0;
}

.l3clp-packing-viewport {
	background:
		radial-gradient(circle, rgba(37, 99, 235, 0.10) 1px, transparent 1px) 0 0 / 28px 28px,
		linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(241, 245, 249, 0.82)),
		#f8fafc;
	border: 2px dashed var(--l3clp-packing-line);
	border-radius: 12px;
	box-shadow: inset 0 0 42px rgba(15, 23, 42, 0.06);
	min-height: 560px;
	overflow: hidden;
	position: relative;
	width: 100%;
}

.l3clp-packing-viewport canvas {
	display: block;
	height: 100%;
	min-height: 560px;
	width: 100%;
}

.l3clp-packing-overlay-labels {
	background: rgba(255, 255, 255, 0.94);
	border: 1px solid rgba(148, 163, 184, 0.7);
	border-radius: 8px;
	box-shadow: 0 10px 24px rgba(15, 23, 42, 0.09);
	display: grid;
	gap: 7px;
	left: 14px;
	max-width: min(300px, calc(100% - 24px));
	padding: 11px 12px;
	position: absolute;
	right: auto;
	top: 12px;
	z-index: 3;
}

.l3clp-packing-overlay-labels div {
	display: grid;
	gap: 2px;
}

.l3clp-packing-overlay-labels span {
	color: #64748b;
	font-size: 11px;
	font-weight: 850;
	letter-spacing: 0.06em;
	line-height: 1.2;
	text-transform: uppercase;
}

.l3clp-packing-overlay-labels strong {
	color: #0f172a;
	font-size: 12px;
	font-weight: 850;
	line-height: 1.25;
}

.l3clp-packing-viewport-loading,
.l3clp-packing-viewport-fallback {
	align-items: center;
	background: rgba(255, 255, 255, 0.88);
	color: var(--l3clp-packing-muted);
	display: flex;
	inset: 0;
	justify-content: center;
	line-height: 1.45;
	padding: 18px;
	position: absolute;
	text-align: center;
}

.l3clp-packing-viewport-loading[hidden],
.l3clp-packing-viewport-fallback[hidden],
.l3clp-packing-preview-note[hidden],
.l3clp-packing-overlay-labels[hidden],
.l3clp-packing-fieldset[hidden],
.l3clp-packing-grid[hidden],
.l3clp-packing-transfer-confirm[hidden],
[data-l3clp-packing-same-gap][hidden],
[data-l3clp-packing-custom-gap][hidden] {
	display: none;
}

.l3clp-packing-tools {
	background: rgba(255, 255, 255, 0.9);
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 12px;
	display: grid;
	gap: 8px;
	grid-template-columns: repeat(5, minmax(0, 1fr));
	margin: 16px auto 0;
	max-width: 920px;
	padding: 8px;
}

.l3clp-packing-tools button {
	min-height: 44px;
	white-space: normal;
	width: 100%;
}

.l3clp-packing-tools button:disabled {
	cursor: not-allowed;
	opacity: 0.52;
}

.l3clp-packing-tools button.is-active {
	background: #0f172a;
	border-color: #0f172a;
	color: #ffffff;
}

.l3clp-packing-preview-note {
	background: #ecfdf5;
	border: 1px solid #86efac;
	border-radius: 8px;
	color: #14532d;
	font-size: 13px;
	font-weight: 750;
	line-height: 1.45;
	margin: 12px 0 0;
	padding: 10px 12px;
}

.l3clp-packing-preview-note-result {
	margin: 0;
}

.l3clp-packing-result-card {
	background: #ffffff;
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 12px;
	overflow: hidden;
}

.l3clp-packing-result-card-head {
	background: #e2e8f0;
	display: grid;
	gap: 5px;
	padding: 14px 16px 16px;
}

.l3clp-packing-result-card-head span {
	color: #334155;
	font-size: 12px;
	font-weight: 850;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.l3clp-packing-result-card-head strong {
	color: #0f172a;
	font-size: 22px;
	line-height: 1.16;
}

.l3clp-packing-result-metrics {
	display: grid;
	padding: 12px 16px 16px;
}

.l3clp-packing-result-metrics div {
	border-bottom: 1px solid var(--l3clp-packing-line);
	display: grid;
	gap: 5px;
	grid-template-columns: minmax(0, 1fr) auto;
	padding: 10px 0;
}

.l3clp-packing-result-metrics div:last-child {
	border-bottom: 0;
}

.l3clp-packing-result-metrics span {
	color: var(--l3clp-packing-muted);
	font-size: 13px;
}

.l3clp-packing-result-metrics strong {
	color: #0f172a;
	font-size: 14px;
}

.l3clp-packing-meter {
	background: #d7dadd;
	border-radius: 999px;
	grid-column: 1 / -1;
	height: 8px;
	overflow: hidden;
}

.l3clp-packing-meter b {
	background: var(--l3clp-packing-accent);
	display: block;
	height: 100%;
	width: 0;
}

.l3clp-packing-alerts {
	display: grid;
	gap: 8px;
}

.l3clp-packing-alert {
	border-radius: 8px;
	font-size: 13px;
	line-height: 1.45;
	padding: 10px 12px;
}

.l3clp-packing-alert-warning {
	background: var(--l3clp-packing-warning-bg);
	border: 1px solid var(--l3clp-packing-warning-border);
	color: #713f12;
}

.l3clp-packing-alert-info {
	background: #eff6ff;
	border: 1px solid #93c5fd;
	color: #1e3a8a;
}

.l3clp-packing-alert-danger {
	background: var(--l3clp-packing-danger-bg);
	border: 1px solid var(--l3clp-packing-danger-border);
	color: #9f1239;
}

.l3clp-packing-result-list {
	background: #ffffff;
	border: 1px solid var(--l3clp-packing-line);
	border-radius: 12px;
	display: grid;
	margin: 0;
	max-height: 420px;
	overflow: auto;
	padding: 4px 14px;
}

.l3clp-packing-result-list div {
	border-bottom: 1px solid var(--l3clp-packing-line);
	display: grid;
	gap: 3px;
	grid-template-columns: 1fr;
	padding: 9px 0;
}

.l3clp-packing-result-list div:last-child {
	border-bottom: 0;
}

.l3clp-packing-result-list dt {
	color: var(--l3clp-packing-muted);
	font-size: 13px;
	font-weight: 800;
	margin: 0;
}

.l3clp-packing-result-list dd {
	color: var(--l3clp-packing-text);
	font-size: 13px;
	font-weight: 650;
	margin: 0;
	word-break: break-word;
}

.l3clp-packing-transfer-confirm {
	background: #eff6ff;
	border: 1px solid #93c5fd;
	border-radius: 12px;
	color: #1e3a8a;
	display: grid;
	gap: 10px;
	padding: 12px;
}

.l3clp-packing-transfer-confirm p {
	font-size: 13px;
	line-height: 1.45;
	margin: 0;
}

.l3clp-packing-transfer-confirm div {
	display: grid;
	gap: 8px;
	grid-template-columns: 1fr 1fr;
}

@media (max-width: 1100px) {
	.l3clp-packing-layout,
	.l3clp-packing-output {
		grid-template-columns: 1fr;
	}

	.l3clp-packing-input-panel {
		border-bottom: 1px solid var(--l3clp-packing-line);
		border-right: 0;
		max-height: none;
	}

	.l3clp-packing-preview-panel,
	.l3clp-packing-result-panel {
		min-height: 0;
	}

	.l3clp-packing-result-panel {
		border-left: 0;
		border-top: 1px solid var(--l3clp-packing-line);
	}
}

@media (max-width: 760px) {
	.l3clp-packing-page {
		padding: 10px;
	}

	.l3clp-packing-page-heading {
		font-size: 26px;
	}

	.l3clp-packing-page-summary {
		font-size: 14px;
	}

	.l3clp-packing-input-panel,
	.l3clp-packing-preview-panel,
	.l3clp-packing-result-panel {
		padding: 16px 12px;
	}

	.l3clp-packing-grid-2,
	.l3clp-packing-grid-3,
	.l3clp-packing-tools {
		grid-template-columns: 1fr;
	}

	.l3clp-packing-viewport,
	.l3clp-packing-viewport canvas {
		min-height: 340px;
	}

	.l3clp-packing-overlay-labels {
		left: 10px;
		right: 10px;
		top: 10px;
	}

	.l3clp-packing-result-metrics div {
		grid-template-columns: 1fr;
	}

	.l3clp-packing-result-list {
		max-height: none;
	}
}

@media (max-width: 520px) {
	.l3clp-packing-page {
		padding: 8px;
	}

	.l3clp-packing-viewport,
	.l3clp-packing-viewport canvas {
		min-height: 310px;
	}
}

/* v0.2.4: centered SEO intro. */
.l3clp-packing-page-intro {
	margin: 0 auto 20px;
	max-width: 1040px;
	text-align: center;
}

.l3clp-packing-page-heading {
	font-size: clamp(30px, 3vw, 42px);
	line-height: 1.08;
}

.l3clp-packing-page-summary {
	font-size: 16px;
	line-height: 1.62;
	margin-left: auto;
	margin-right: auto;
	max-width: 980px;
}

@media (max-width: 760px) {
	.l3clp-packing-page-intro {
		margin-bottom: 16px;
	}
}


/* v0.2.6: keep the WebGL viewport stable without making the camera feel zoomed in. */
.l3clp-packing-viewport {
	height: clamp(430px, 42vw, 520px);
	contain: layout paint;
}

.l3clp-packing-viewport canvas {
	height: 100%;
	min-height: 0;
}

@media (max-width: 900px) {
	.l3clp-packing-viewport,
	.l3clp-packing-viewport canvas {
		height: 340px;
		min-height: 0;
	}
}

@media (max-width: 520px) {
	.l3clp-packing-viewport,
	.l3clp-packing-viewport canvas {
		height: 310px;
		min-height: 0;
	}
}