#land-unit-studio,
#land-unit-studio * { box-sizing: border-box; }

#land-unit-studio {
	--luc-brand: #0f766e;
	--luc-brand-2: #0891b2;
	--luc-brand-soft: #ecfdf5;
	--luc-ink: #102a2b;
	--luc-muted: #64748b;
	--luc-line: #dce8e7;
	--luc-panel: #ffffff;
	--luc-bg: #f5f9f8;
	--luc-danger: #dc2626;
	--luc-shadow: 0 16px 42px rgba(15, 118, 110, .10);
	position: relative;
	width: min(1180px, calc(100% - 20px));
	margin: 12px auto 32px;
	border: 1px solid var(--luc-line);
	border-radius: 24px;
	background:
		radial-gradient(circle at 0 0, rgba(20, 184, 166, .08), transparent 32%),
		var(--luc-bg);
	box-shadow: var(--luc-shadow);
	overflow: hidden;
	color: var(--luc-ink);
	font-family: "SolaimanLipi", "Noto Sans Bengali", "Noto Serif Bengali", sans-serif;
	font-size: 15px;
	line-height: 1.45;
}

#land-unit-studio button,
#land-unit-studio input,
#land-unit-studio select { font: inherit; }

#land-unit-studio button { -webkit-tap-highlight-color: transparent; }

.luc-topbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
	padding: 16px 18px;
	border-bottom: 1px solid var(--luc-line);
	background: rgba(255,255,255,.94);
}

.luc-title-group,
.luc-head-actions,
.luc-title-group > div { min-width: 0; }
.luc-title-group { display: flex; align-items: center; gap: 11px; }
.luc-app-icon {
	display: grid;
	place-items: center;
	width: 46px;
	height: 46px;
	flex: 0 0 46px;
	border-radius: 15px;
	background: linear-gradient(145deg, #0f766e, #0891b2);
	box-shadow: 0 8px 20px rgba(8,145,178,.22);
	color: #fff;
	font-size: 18px;
}
.luc-kicker { color: var(--luc-muted); font-size: 11px; font-weight: 700; letter-spacing: .02em; }
.luc-kicker span { display: inline-flex; margin-right: 5px; padding: 2px 6px; border-radius: 99px; background: #d1fae5; color: #047857; font-size: 9px; font-family: Arial, sans-serif; }
.luc-title-group h1 { margin: 2px 0 0; font-size: clamp(18px, 2.2vw, 24px); line-height: 1.15; font-weight: 900; letter-spacing: -.015em; }
.luc-head-actions { display: flex; gap: 7px; }
.luc-icon-btn,
.luc-side-head button {
	display: grid;
	place-items: center;
	width: 40px;
	height: 40px;
	border: 1px solid var(--luc-line);
	border-radius: 12px;
	background: #fff;
	color: #334155;
	cursor: pointer;
}
.luc-icon-btn:hover { border-color: #5eead4; color: var(--luc-brand); background: #f0fdfa; }

.luc-trust-row {
	display: flex;
	align-items: center;
	gap: 18px;
	padding: 8px 18px;
	border-bottom: 1px solid #e8f0ef;
	background: #fbfefd;
	color: #476463;
	font-size: 11px;
	font-weight: 700;
}
.luc-trust-row span { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.luc-trust-row i { color: #0d9488; }

.luc-tabs {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 6px;
	padding: 9px 12px;
	border-bottom: 1px solid var(--luc-line);
	background: rgba(255,255,255,.86);
}
.luc-tab {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 7px;
	min-height: 42px;
	padding: 7px 10px;
	border: 1px solid transparent;
	border-radius: 12px;
	background: transparent;
	color: #64748b;
	font-weight: 800;
	cursor: pointer;
}
.luc-tab:hover { background: #f1f5f9; color: #334155; }
.luc-tab.is-active { border-color: #99f6e4; background: #ecfdf5; color: #0f766e; box-shadow: inset 0 -2px 0 #14b8a6; }

.luc-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 14px; padding: 14px; }
.luc-main { min-width: 0; display: grid; gap: 14px; align-content: start; }
.luc-panel,
.luc-side {
	border: 1px solid var(--luc-line);
	border-radius: 18px;
	background: var(--luc-panel);
	box-shadow: 0 7px 24px rgba(15, 23, 42, .045);
}
.luc-work-panel,
.luc-history-panel,
.luc-results { padding: 16px; }
.luc-panel-heading,
.luc-results-head,
.luc-side-head,
.luc-setting-label,
.luc-toggle-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.luc-panel-heading > div,
.luc-results-head > div,
.luc-side-head > div { display: flex; align-items: center; gap: 9px; min-width: 0; }
.luc-panel-heading h2,
.luc-results-head h2 { margin: 0; font-size: 16px; font-weight: 900; }
.luc-panel-heading > small,
.luc-results-head small { color: var(--luc-muted); font-size: 11px; text-align: right; }
.luc-step {
	display: grid;
	place-items: center;
	width: 27px;
	height: 27px;
	flex: 0 0 27px;
	border-radius: 9px;
	background: #ccfbf1;
	color: #0f766e;
	font: 800 12px/1 Arial, sans-serif;
}

.luc-convert-row { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(210px, 1fr); gap: 10px; margin-top: 14px; }
.luc-field { display: grid; gap: 6px; min-width: 0; }
.luc-field > span { color: #475569; font-size: 11px; font-weight: 800; }
.luc-field input,
.luc-field select {
	width: 100%;
	height: 46px;
	min-width: 0;
	padding: 8px 12px;
	border: 1px solid #cbd5e1;
	border-radius: 12px;
	outline: 0;
	background: #fff;
	color: #0f172a;
	font-weight: 800;
	transition: border-color .15s, box-shadow .15s;
}
.luc-value-field input { font-family: "SolaimanLipi", "Noto Sans Bengali", sans-serif; font-size: 21px; }
.luc-field input:focus,
.luc-field select:focus { border-color: #14b8a6; box-shadow: 0 0 0 3px rgba(20,184,166,.14); }
.luc-input-help { margin: 7px 0 0; color: var(--luc-muted); font-size: 10px; }
.luc-input-help i { color: #f59e0b; }
.luc-unit-chips { display: flex; gap: 6px; margin-top: 12px; overflow-x: auto; scrollbar-width: none; }
.luc-unit-chips::-webkit-scrollbar { display: none; }
.luc-unit-chips button {
	min-width: 68px;
	height: 34px;
	padding: 4px 12px;
	border: 1px solid #dbe5e4;
	border-radius: 99px;
	background: #f8fafc;
	color: #475569;
	font-size: 11px;
	font-weight: 800;
	cursor: pointer;
}
.luc-unit-chips button.is-active { border-color: #2dd4bf; background: #ecfdf5; color: #0f766e; }
.luc-primary-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	width: 100%;
	min-height: 46px;
	margin-top: 14px;
	border: 0;
	border-radius: 13px;
	background: linear-gradient(135deg, #0f766e, #0891b2);
	box-shadow: 0 9px 18px rgba(15,118,110,.19);
	color: #fff;
	font-weight: 900;
	cursor: pointer;
}
.luc-primary-btn:active { transform: translateY(1px); }

.luc-mixed-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; margin-top: 14px; }
.luc-mixed-wide { grid-column: span 2; }

.luc-results { background: linear-gradient(160deg, #fff 0%, #f8fffd 100%); }
.luc-results-head { margin-bottom: 13px; }
.luc-results-head > div > div { min-width: 0; }
.luc-copy-all,
.luc-text-btn {
	border: 0;
	background: transparent;
	color: var(--luc-brand);
	font-size: 11px;
	font-weight: 900;
	cursor: pointer;
}
.luc-copy-all { display: inline-flex; align-items: center; gap: 5px; padding: 7px 9px; border-radius: 9px; background: #ecfdf5; }
.luc-primary-results { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.luc-result-card {
	position: relative;
	min-width: 0;
	padding: 13px 11px 11px;
	border: 1px solid #dceae8;
	border-radius: 14px;
	background: #fff;
	overflow: hidden;
}
.luc-result-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--card-accent, #14b8a6); }
.luc-result-card small { display: block; color: var(--luc-muted); font-size: 10px; font-weight: 800; }
.luc-result-card strong { display: block; margin-top: 4px; overflow-wrap: anywhere; color: var(--luc-ink); font-size: clamp(16px, 2vw, 21px); line-height: 1.2; font-family: "SolaimanLipi", "Noto Sans Bengali", sans-serif; }
.luc-result-card button { position: absolute; top: 7px; right: 7px; width: 27px; height: 27px; border: 0; border-radius: 8px; background: #f1f5f9; color: #64748b; cursor: pointer; opacity: .72; }
.luc-result-card:hover button { opacity: 1; }
.luc-more-results { margin-top: 9px; border-top: 1px dashed #d9e6e4; }
.luc-more-results summary,
.luc-formula-card summary { display: flex; align-items: center; justify-content: space-between; gap: 7px; padding: 11px 2px 4px; color: #476463; font-size: 11px; font-weight: 900; cursor: pointer; list-style: none; }
.luc-more-results summary::-webkit-details-marker,
.luc-formula-card summary::-webkit-details-marker { display: none; }
.luc-more-results[open] summary i:last-child,
.luc-formula-card[open] summary i:last-child { transform: rotate(180deg); }
.luc-secondary-results { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; margin-top: 7px; }
.luc-secondary-item { padding: 9px; border-radius: 10px; background: #f1f5f9; }
.luc-secondary-item small { display: block; color: var(--luc-muted); font-size: 9px; }
.luc-secondary-item b { display: block; margin-top: 2px; overflow-wrap: anywhere; font-size: 13px; }
.luc-breakdown { margin-top: 10px; padding: 10px 12px; border: 1px solid #bae6fd; border-radius: 12px; background: #f0f9ff; color: #075985; font-size: 12px; font-weight: 800; }
.luc-breakdown i { margin-right: 5px; }
.luc-result-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; margin-top: 11px; }
.luc-result-actions button,
.luc-outline-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
	min-height: 38px;
	padding: 7px;
	border: 1px solid #d6e3e1;
	border-radius: 10px;
	background: #fff;
	color: #334155;
	font-size: 10px;
	font-weight: 900;
	cursor: pointer;
}
.luc-result-actions button:hover,
.luc-outline-btn:hover { border-color: #5eead4; color: #0f766e; background: #f0fdfa; }

.luc-side { align-self: start; position: sticky; top: 12px; padding: 14px; }
.luc-side-head { padding-bottom: 11px; border-bottom: 1px solid var(--luc-line); }
.luc-side-head > div > i { color: #0f766e; }
.luc-side-head span { display: grid; }
.luc-side-head b { font-size: 13px; }
.luc-side-head small { color: var(--luc-muted); font-size: 9px; }
.luc-side-head button { display: none; width: 32px; height: 32px; }
.luc-side > .luc-field { margin-top: 12px; }
.luc-standard-card { display: flex; align-items: flex-start; gap: 8px; margin-top: 10px; padding: 10px; border: 1px solid #a7f3d0; border-radius: 12px; background: #ecfdf5; }
.luc-standard-card > i { margin-top: 2px; color: #059669; }
.luc-standard-card div { display: grid; min-width: 0; }
.luc-standard-card b { color: #065f46; font-size: 11px; }
.luc-standard-card small { color: #52756d; font-size: 9px; line-height: 1.4; }
.luc-custom-settings { display: grid; gap: 10px; margin-top: 10px; padding: 10px; border: 1px dashed #cbd5e1; border-radius: 12px; background: #f8fafc; }
.luc-settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.luc-custom-settings .luc-field input { height: 39px; }
.luc-setting-block { margin-top: 12px; padding-top: 12px; border-top: 1px solid #e7efee; }
.luc-setting-label span,
.luc-toggle-row b { color: #334155; font-size: 11px; font-weight: 900; }
.luc-setting-label b { display: grid; place-items: center; min-width: 26px; height: 24px; border-radius: 7px; background: #ccfbf1; color: #0f766e; font: 800 11px/1 Arial, sans-serif; }
.luc-setting-block > input[type="range"] { width: 100%; margin: 8px 0 2px; accent-color: #0f766e; }
.luc-setting-block > small,
.luc-toggle-row small { display: block; color: var(--luc-muted); font-size: 9px; }
.luc-switch { position: relative; width: 42px; height: 24px; flex: 0 0 42px; }
.luc-switch input { position: absolute; opacity: 0; pointer-events: none; }
.luc-switch span { position: absolute; inset: 0; border-radius: 99px; background: #cbd5e1; cursor: pointer; transition: .2s; }
.luc-switch span::after { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; top: 3px; border-radius: 50%; background: #fff; box-shadow: 0 2px 5px rgba(15,23,42,.25); transition: .2s; }
.luc-switch input:checked + span { background: #0d9488; }
.luc-switch input:checked + span::after { transform: translateX(18px); }
.luc-formula-card { margin-top: 12px; border-top: 1px solid #e7efee; }
.luc-formula-card > div { color: #536766; font-size: 10px; }
.luc-formula-card p { margin: 7px 0; }
.luc-formula-card a { display: inline-flex; gap: 5px; align-items: center; color: #0369a1; font-weight: 900; text-decoration: none; }

.luc-history-list { display: grid; gap: 7px; margin-top: 12px; }
.luc-history-item { display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; align-items: center; gap: 9px; padding: 9px; border: 1px solid #e2e8f0; border-radius: 12px; background: #fff; }
.luc-history-item > i { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: #ecfdf5; color: #0f766e; }
.luc-history-item div { min-width: 0; }
.luc-history-item b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }
.luc-history-item small { display: block; color: var(--luc-muted); font-size: 9px; }
.luc-history-actions { display: flex; gap: 4px; }
.luc-history-actions button { width: 31px; height: 31px; border: 0; border-radius: 8px; background: #f1f5f9; color: #475569; cursor: pointer; }
.luc-history-empty { padding: 28px 10px; border: 1px dashed #cbd5e1; border-radius: 13px; text-align: center; color: var(--luc-muted); }
.luc-history-empty i { display: block; margin-bottom: 8px; color: #94a3b8; font-size: 24px; }
.luc-danger { color: var(--luc-danger); }

.luc-toast { position: fixed; left: 50%; bottom: 24px; z-index: 999999; max-width: calc(100vw - 30px); padding: 9px 14px; border-radius: 99px; background: #0f172a; color: #fff; box-shadow: 0 10px 28px rgba(15,23,42,.3); font-size: 11px; font-weight: 800; opacity: 0; pointer-events: none; transform: translate(-50%, 12px); transition: .2s; }
.luc-toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

.dark #land-unit-studio {
	--luc-ink: #e7f3f2;
	--luc-muted: #94a3b8;
	--luc-line: #263c43;
	--luc-panel: #10252b;
	--luc-bg: #091a20;
	background: radial-gradient(circle at 0 0, rgba(20,184,166,.11), transparent 32%), var(--luc-bg);
}
.dark .luc-topbar,
.dark .luc-tabs,
.dark .luc-trust-row { background: rgba(13,35,41,.96); }
.dark .luc-icon-btn,
.dark .luc-field input,
.dark .luc-field select,
.dark .luc-result-card,
.dark .luc-result-actions button,
.dark .luc-outline-btn,
.dark .luc-history-item { border-color: #304850; background: #122b32; color: #e2e8f0; }
.dark .luc-unit-chips button,
.dark .luc-secondary-item { border-color: #304850; background: #142d35; color: #cbd5e1; }
.dark .luc-unit-chips button.is-active { border-color: #2dd4bf; background: #113f3d; color: #99f6e4; }
.dark .luc-result-card strong,
.dark .luc-panel-heading h2,
.dark .luc-results-head h2 { color: #f1f5f9; }
.dark .luc-standard-card { border-color: #116c5e; background: #103a38; }
.dark .luc-standard-card b { color: #99f6e4; }
.dark .luc-custom-settings { border-color: #3c5159; background: #0d2026; }
.dark .luc-breakdown { border-color: #155e75; background: #0c3140; color: #bae6fd; }

@media (max-width: 860px) {
	#land-unit-studio { width: 100%; margin: 0 auto 20px; border-width: 0 0 1px; border-radius: 0; }
	.luc-layout { grid-template-columns: 1fr; padding: 10px; }
	.luc-side { position: fixed; z-index: 99999; inset: auto 0 0; max-height: min(76vh, 620px); overflow-y: auto; border-radius: 20px 20px 0 0; box-shadow: 0 -16px 48px rgba(15,23,42,.25); transform: translateY(105%); visibility: hidden; transition: transform .24s ease, visibility .24s; }
	.luc-side.is-open { transform: translateY(0); visibility: visible; }
	.luc-side-head button { display: grid; }
	.luc-primary-results { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
	.luc-topbar { padding: 11px 10px; }
	.luc-app-icon { width: 40px; height: 40px; flex-basis: 40px; border-radius: 13px; }
	.luc-title-group h1 { font-size: 16px; }
	.luc-kicker { font-size: 9px; }
	.luc-head-actions { gap: 4px; }
	.luc-icon-btn { width: 36px; height: 36px; border-radius: 10px; }
	.luc-trust-row { gap: 12px; padding: 7px 10px; overflow-x: auto; scrollbar-width: none; font-size: 9px; }
	.luc-tabs { position: sticky; top: 0; z-index: 15; padding: 7px; }
	.luc-tab { min-height: 39px; padding: 5px; font-size: 10px; }
	.luc-tab i { font-size: 11px; }
	.luc-work-panel,
	.luc-history-panel,
	.luc-results { padding: 12px; border-radius: 15px; }
	.luc-panel-heading { align-items: flex-start; }
	.luc-panel-heading > small { max-width: 120px; font-size: 9px; }
	.luc-panel-heading h2,
	.luc-results-head h2 { font-size: 13px; }
	.luc-convert-row { grid-template-columns: minmax(0, 1fr) 145px; gap: 7px; }
	.luc-field input,
	.luc-field select { height: 43px; padding: 6px 9px; border-radius: 10px; font-size: 12px; }
	.luc-value-field input { font-size: 18px; }
	.luc-unit-chips button { min-width: 60px; height: 32px; padding: 3px 9px; }
	.luc-mixed-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.luc-mixed-wide { grid-column: span 2; }
	.luc-result-card { padding: 11px 9px 9px; }
	.luc-result-card strong { font-size: 17px; }
	.luc-secondary-results { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.luc-result-actions { position: sticky; bottom: 7px; z-index: 5; padding: 6px; border: 1px solid #dbe5e4; border-radius: 13px; background: rgba(255,255,255,.94); box-shadow: 0 8px 24px rgba(15,23,42,.13); }
	.dark .luc-result-actions { border-color: #304850; background: rgba(16,37,43,.94); }
	.luc-result-actions button { min-height: 35px; padding: 4px; font-size: 9px; }
}

@media (max-width: 385px) {
	.luc-title-group h1 { max-width: 190px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
	.luc-tab { gap: 4px; font-size: 9px; }
	.luc-convert-row { grid-template-columns: 1fr; }
}

@media print {
	body * { visibility: hidden !important; }
	#land-unit-studio,
	#land-unit-studio * { visibility: visible !important; }
	#land-unit-studio { position: absolute; inset: 0; width: 100%; margin: 0; border: 0; box-shadow: none; background: #fff; color: #111827; }
	#land-unit-studio .luc-topbar { padding: 12px; border-bottom: 2px solid #0f766e; background: #fff; }
	#land-unit-studio .luc-head-actions,
	#land-unit-studio .luc-trust-row,
	#land-unit-studio .luc-tabs,
	#land-unit-studio .luc-work-panel,
	#land-unit-studio .luc-history-panel,
	#land-unit-studio .luc-side,
	#land-unit-studio .luc-result-actions,
	#land-unit-studio .luc-copy-all,
	#land-unit-studio .luc-result-card button { display: none !important; }
	#land-unit-studio .luc-layout { display: block; padding: 14px 0; }
	#land-unit-studio .luc-results { display: block !important; border: 0; box-shadow: none; background: #fff; }
	#land-unit-studio .luc-primary-results { grid-template-columns: repeat(4, 1fr); }
	#land-unit-studio .luc-more-results { display: block; }
	#land-unit-studio .luc-more-results > summary { display: none; }
	#land-unit-studio .luc-secondary-results { grid-template-columns: repeat(4, 1fr); }
}