.bg-tonnage {
	--bg-primary: #00509d;
	--bg-primary-dark: #003f88;
	--bg-ink: #1f2937;
	--bg-copy: #5f6875;
	--bg-muted: #7b8490;
	--bg-line: #dfe5eb;
	--bg-soft: #f5f7f9;
	--bg-pale-blue: #eef5fb;
	--bg-white: #ffffff;
	--bg-success: #0f766e;
	--bg-warning: #9a3412;
	color: var(--bg-copy);
	font-family: Arial, Helvetica, sans-serif;
	margin: 0 auto;
	max-width: 1180px;
	padding: 52px 20px 76px;
}

.bg-tonnage *,
.bg-tonnage *::before,
.bg-tonnage *::after {
	box-sizing: border-box;
}

.bg-tonnage h1,
.bg-tonnage h2,
.bg-tonnage h3,
.bg-tonnage p {
	margin-top: 0;
}

.bg-tonnage h1,
.bg-tonnage h2,
.bg-tonnage h3 {
	color: var(--bg-ink);
	font-family: Arial, Helvetica, sans-serif;
	letter-spacing: -0.02em;
}

.bg-tonnage h1 {
	font-size: clamp(34px, 4vw, 40px);
	line-height: 1.16;
	margin-bottom: 18px;
}

.bg-tonnage h2 {
	font-size: clamp(27px, 3vw, 34px);
	line-height: 1.22;
	margin-bottom: 14px;
}

.bg-tonnage h3 {
	font-size: 19px;
	line-height: 1.35;
	margin-bottom: 11px;
}

.bg-tonnage__eyebrow,
.bg-tonnage__step {
	color: var(--bg-primary);
	font-size: 13px;
	font-weight: 700;
	letter-spacing: 0.04em;
	margin-bottom: 9px;
}

.bg-tonnage__intro {
	align-items: center;
	display: grid;
	gap: 42px;
	grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
	margin-bottom: 42px;
}

.bg-tonnage__intro-copy > p:not(.bg-tonnage__eyebrow) {
	font-size: 18px;
	line-height: 1.7;
	margin-bottom: 22px;
	max-width: 660px;
}

.bg-tonnage__formula {
	align-items: center;
	background: var(--bg-pale-blue);
	border-left: 4px solid var(--bg-primary);
	border-radius: 0 8px 8px 0;
	display: grid;
	gap: 5px;
	padding: 16px 18px;
}

.bg-tonnage__formula span {
	color: var(--bg-muted);
	font-size: 12px;
	font-weight: 700;
}

.bg-tonnage__formula strong {
	color: var(--bg-ink);
	font-size: clamp(16px, 1.7vw, 20px);
	line-height: 1.4;
}

.bg-tonnage__intro-visual {
	background: var(--bg-soft);
	border-radius: 16px;
	overflow: hidden;
	padding: 18px 18px 0;
}

.bg-tonnage__intro-visual img {
	display: block;
	height: auto;
	margin: 0 auto;
	max-height: 285px;
	object-fit: contain;
	width: 100%;
}

.bg-tonnage__intro-visual p {
	background: var(--bg-primary);
	color: #e8f3ff;
	font-size: 13px;
	line-height: 1.55;
	margin: 0 -18px;
	padding: 13px 18px;
}

.bg-tonnage__intro-visual p strong {
	color: var(--bg-white);
}

.bg-tonnage__surface {
	background: var(--bg-white);
	border: 1px solid var(--bg-line);
	border-radius: 18px;
	box-shadow: 0 12px 34px rgba(29, 54, 78, 0.08);
	display: grid;
	grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
	margin-bottom: 48px;
	overflow: hidden;
}

.bg-tonnage .bg-tonnage__form {
	background: var(--bg-white);
	padding: clamp(26px, 4vw, 44px);
}

.bg-tonnage__form-head {
	align-items: flex-start;
	display: flex;
	gap: 22px;
	justify-content: space-between;
	margin-bottom: 26px;
}

.bg-tonnage__form-head h2,
.bg-tonnage__results h2 {
	font-size: clamp(25px, 2.3vw, 30px);
	margin-bottom: 0;
}

.bg-tonnage .bg-tonnage__units {
	background: var(--bg-soft);
	border: 1px solid var(--bg-line);
	border-radius: 999px;
	display: inline-flex;
	flex: 0 0 auto;
	padding: 3px;
}

.bg-tonnage .bg-tonnage__units button {
	background: transparent;
	border: 0;
	border-radius: 999px;
	color: var(--bg-copy);
	cursor: pointer;
	font: inherit;
	font-size: 13px;
	font-weight: 700;
	min-height: 36px;
	padding: 6px 13px;
}

.bg-tonnage .bg-tonnage__units button.is-active {
	background: var(--bg-primary);
	color: var(--bg-white);
}

.bg-tonnage__fields {
	display: grid;
	gap: 18px;
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bg-tonnage__field {
	display: flex;
	flex-direction: column;
	gap: 7px;
	margin-bottom: 18px;
	min-width: 0;
}

.bg-tonnage__fields .bg-tonnage__field {
	margin-bottom: 0;
}

.bg-tonnage__field--wide {
	grid-column: 1 / -1;
}

.bg-tonnage__field label {
	color: var(--bg-ink);
	font-size: 14px;
	font-weight: 700;
}

.bg-tonnage__field label span {
	color: var(--bg-copy);
	font-weight: 400;
}

.bg-tonnage .bg-tonnage__field input,
.bg-tonnage .bg-tonnage__field select {
	appearance: none;
	background-color: var(--bg-white);
	border: 1px solid #cbd5df;
	border-radius: 7px;
	color: var(--bg-ink);
	font: inherit;
	font-size: 16px;
	min-height: 48px;
	padding: 10px 12px;
	width: 100%;
}

.bg-tonnage .bg-tonnage__field select {
	background-image:
		linear-gradient(45deg, transparent 50%, #66717f 50%),
		linear-gradient(135deg, #66717f 50%, transparent 50%);
	background-position:
		calc(100% - 17px) 21px,
		calc(100% - 12px) 21px;
	background-repeat: no-repeat;
	background-size: 5px 5px, 5px 5px;
	padding-right: 34px;
}

.bg-tonnage .bg-tonnage__field input:focus,
.bg-tonnage .bg-tonnage__field select:focus,
.bg-tonnage button:focus-visible,
.bg-tonnage a:focus-visible {
	outline: 3px solid rgba(0, 80, 157, 0.25);
	outline-offset: 2px;
}

.bg-tonnage__hint {
	color: var(--bg-muted);
	font-size: 12px;
	line-height: 1.45;
	margin-bottom: 0;
}

.bg-tonnage .bg-tonnage__text-button {
	align-self: flex-start;
	background: transparent;
	border: 0;
	border-radius: 0;
	color: var(--bg-primary);
	cursor: pointer;
	font: inherit;
	font-size: 12px;
	font-weight: 700;
	padding: 2px 0;
	text-decoration: underline;
	text-underline-offset: 3px;
}

.bg-tonnage .bg-tonnage__calculate,
.bg-tonnage .bg-tonnage__copy {
	border: 0;
	border-radius: 999px;
	cursor: pointer;
	font: inherit;
	font-weight: 700;
	min-height: 50px;
	padding: 12px 20px;
}

.bg-tonnage .bg-tonnage__calculate {
	background: var(--bg-primary);
	color: var(--bg-white);
	margin-top: 26px;
	width: 100%;
}

.bg-tonnage .bg-tonnage__calculate:hover,
.bg-tonnage .bg-tonnage__cta-primary:hover {
	background: var(--bg-primary-dark);
	color: var(--bg-white);
}

.bg-tonnage__errors {
	background: #fff1f2;
	border-left: 4px solid #be123c;
	border-radius: 0 6px 6px 0;
	color: #9f1239;
	font-size: 14px;
	font-weight: 600;
	margin-top: 20px;
	padding: 12px 14px;
}

.bg-tonnage__results {
	background: var(--bg-primary);
	color: #e7f2ff;
	padding: clamp(26px, 4vw, 44px);
}

.bg-tonnage__results .bg-tonnage__step {
	color: #c9e4ff;
}

.bg-tonnage__results h2 {
	color: var(--bg-white);
}

.bg-tonnage__result-primary {
	border-bottom: 1px solid rgba(255, 255, 255, 0.24);
	display: grid;
	gap: 6px;
	margin: 27px 0;
	padding-bottom: 24px;
}

.bg-tonnage__result-primary span,
.bg-tonnage__result-grid span {
	color: #d6eaff;
	font-size: 13px;
}

.bg-tonnage__result-primary strong {
	color: var(--bg-white);
	font-size: clamp(34px, 4vw, 46px);
	line-height: 1.08;
}

.bg-tonnage__result-primary small,
.bg-tonnage__result-grid small {
	color: #c4e0fb;
	font-size: 12px;
}

.bg-tonnage__result-grid {
	display: grid;
	gap: 22px 18px;
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bg-tonnage__result-grid > div {
	display: grid;
	gap: 5px;
}

.bg-tonnage__result-grid strong {
	color: var(--bg-white);
	font-size: 19px;
	line-height: 1.25;
}

.bg-tonnage__warnings {
	display: grid;
	gap: 10px;
	margin-top: 24px;
}

.bg-tonnage__notice {
	border-left: 3px solid currentColor;
	border-radius: 0 6px 6px 0;
	font-size: 13px;
	line-height: 1.5;
	margin-bottom: 0;
	padding: 10px 12px;
}

.bg-tonnage__notice--ok {
	background: rgba(4, 120, 87, 0.2);
	color: #d1fae5;
}

.bg-tonnage__notice--warning {
	background: rgba(154, 52, 18, 0.22);
	color: #ffedd5;
}

.bg-tonnage .bg-tonnage__copy {
	background: var(--bg-white);
	border: 1px solid var(--bg-white);
	color: var(--bg-primary);
	margin-top: 22px;
	width: 100%;
}

.bg-tonnage .bg-tonnage__copy:hover {
	background: #eef6ff;
	color: var(--bg-primary-dark);
}

.bg-tonnage__scope {
	color: #d6eaff;
	font-size: 12px;
	line-height: 1.55;
	margin: 16px 0 0;
}

.bg-tonnage__explain {
	background: var(--bg-soft);
	border-radius: 16px;
	margin-bottom: 32px;
	padding: clamp(26px, 4vw, 42px);
}

.bg-tonnage__section-heading {
	max-width: 760px;
}

.bg-tonnage__section-heading > p:last-child {
	font-size: 16px;
	line-height: 1.65;
	margin-bottom: 28px;
}

.bg-tonnage__explain-grid {
	display: grid;
	gap: 24px;
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bg-tonnage__explain-grid > div {
	background: var(--bg-white);
	border: 1px solid var(--bg-line);
	border-radius: 10px;
	padding: 22px;
}

.bg-tonnage__explain ul {
	margin: 0;
	padding-left: 20px;
}

.bg-tonnage__explain li {
	line-height: 1.6;
	margin-bottom: 7px;
}

.bg-tonnage__sources {
	border-top: 1px solid #d6dde4;
	font-size: 13px;
	line-height: 1.7;
	margin: 24px 0 0;
	padding-top: 18px;
}

.bg-tonnage__sources a {
	color: var(--bg-primary);
}

.bg-tonnage__related {
	align-items: start;
	border: 1px solid var(--bg-line);
	border-radius: 16px;
	display: grid;
	gap: 28px 44px;
	grid-template-columns: minmax(230px, 0.75fr) minmax(0, 1.25fr);
	margin-bottom: 32px;
	padding: clamp(25px, 4vw, 38px);
}

.bg-tonnage__related h2 {
	font-size: clamp(25px, 2.5vw, 31px);
	margin-bottom: 0;
}

.bg-tonnage__related ul {
	list-style: none;
	margin: 0;
	padding: 0;
}

.bg-tonnage__related li {
	border-bottom: 1px solid var(--bg-line);
	display: grid;
	gap: 6px;
	padding: 0 0 17px;
}

.bg-tonnage__related li + li {
	padding-top: 17px;
}

.bg-tonnage__related li:last-child {
	border-bottom: 0;
	padding-bottom: 0;
}

.bg-tonnage__related a {
	color: var(--bg-primary);
	font-size: 17px;
	font-weight: 700;
	text-decoration: none;
}

.bg-tonnage__related a::after {
	content: " →";
}

.bg-tonnage__related a:hover {
	color: var(--bg-primary-dark);
	text-decoration: underline;
	text-underline-offset: 3px;
}

.bg-tonnage__related span {
	color: var(--bg-copy);
	font-size: 14px;
	line-height: 1.55;
}

.bg-tonnage__cta {
	align-items: center;
	background: var(--bg-pale-blue);
	border-radius: 16px;
	display: grid;
	gap: 30px 48px;
	grid-template-columns: minmax(0, 1fr) minmax(285px, 0.45fr);
	padding: clamp(26px, 4vw, 42px);
}

.bg-tonnage__cta p:not(.bg-tonnage__eyebrow) {
	font-size: 16px;
	line-height: 1.65;
	margin-bottom: 0;
}

.bg-tonnage__cta-actions {
	display: grid;
	gap: 12px;
}

.bg-tonnage .bg-tonnage__cta-actions a {
	border-radius: 999px;
	display: block;
	font-weight: 700;
	line-height: 1.35;
	padding: 14px 18px;
	text-align: center;
	text-decoration: none;
}

.bg-tonnage .bg-tonnage__cta-primary {
	background: var(--bg-primary);
	color: var(--bg-white);
}

.bg-tonnage .bg-tonnage__cta-secondary {
	background: var(--bg-white);
	border: 1px solid var(--bg-primary);
	color: var(--bg-primary);
}

@media (max-width: 880px) {
	.bg-tonnage__intro,
	.bg-tonnage__surface,
	.bg-tonnage__related,
	.bg-tonnage__cta {
		grid-template-columns: 1fr;
	}

	.bg-tonnage__intro {
		gap: 28px;
	}

	.bg-tonnage__surface {
		border-radius: 14px;
	}

	.bg-tonnage__results {
		border-radius: 0 0 14px 14px;
	}

	.bg-tonnage__intro-visual img {
		max-height: 320px;
	}
}

@media (max-width: 620px) {
	.bg-tonnage {
		padding: 30px 14px 52px;
	}

	.bg-tonnage h1 {
		font-size: 32px;
	}

	.bg-tonnage h2 {
		font-size: 26px;
	}

	.bg-tonnage__intro-copy > p:not(.bg-tonnage__eyebrow) {
		font-size: 16px;
	}

	.bg-tonnage__intro-visual {
		padding: 12px 12px 0;
	}

	.bg-tonnage__intro-visual p {
		margin-left: -12px;
		margin-right: -12px;
	}

	.bg-tonnage__form-head {
		align-items: stretch;
		flex-direction: column;
	}

	.bg-tonnage__units {
		align-self: flex-start;
	}

	.bg-tonnage__fields,
	.bg-tonnage__result-grid,
	.bg-tonnage__explain-grid {
		grid-template-columns: 1fr;
	}

	.bg-tonnage__result-primary strong {
		font-size: 34px;
	}

	.bg-tonnage__form,
	.bg-tonnage__results,
	.bg-tonnage__explain,
	.bg-tonnage__related,
	.bg-tonnage__cta {
		padding: 24px 20px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.bg-tonnage * {
		scroll-behavior: auto;
	}
}