.gvc-calculator {
	--gvc-primary: #2f6d3b;
	--gvc-primary-dark: #234f2b;
	--gvc-bg: #f6f8f5;
	--gvc-border: #d8ddd4;
	--gvc-text: #22291f;
	max-width: 560px;
	margin: 0 auto;
	padding: 28px;
	background: var(--gvc-bg);
	border: 1px solid var(--gvc-border);
	border-radius: 12px;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	color: var(--gvc-text);
	box-sizing: border-box;
}

.gvc-calculator * {
	box-sizing: border-box;
}

.gvc-field {
	margin-bottom: 18px;
}

.gvc-label {
	display: block;
	font-weight: 600;
	font-size: 14px;
	margin-bottom: 6px;
}

.gvc-unit {
	font-weight: 400;
	color: #6b756a;
}

.gvc-radio-group {
	display: flex;
	gap: 10px;
}

.gvc-radio {
	flex: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 10px 12px;
	border: 1px solid var(--gvc-border);
	border-radius: 8px;
	background: #fff;
	cursor: pointer;
	font-size: 14px;
	transition: border-color .15s ease, background .15s ease;
}

.gvc-radio:has(input:checked) {
	border-color: var(--gvc-primary);
	background: #eaf3ea;
	font-weight: 600;
}

.gvc-radio input {
	accent-color: var(--gvc-primary);
}

.gvc-dims {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 0 14px;
}

.gvc-dim-depth {
	grid-column: 1 / -1;
}

.gvc-calculator input[type="number"],
.gvc-calculator select {
	width: 100%;
	padding: 10px 12px;
	border: 1px solid var(--gvc-border);
	border-radius: 8px;
	font-size: 15px;
	background: #fff;
	color: var(--gvc-text);
}

.gvc-calculator input[type="number"]:focus,
.gvc-calculator select:focus {
	outline: none;
	border-color: var(--gvc-primary);
	box-shadow: 0 0 0 3px rgba(47, 109, 59, 0.15);
}

.gvc-hint {
	margin: 6px 2px 0;
	font-size: 12px;
	color: #6b756a;
}

.gvc-submit {
	width: 100%;
	padding: 13px 16px;
	background: var(--gvc-primary);
	color: #fff;
	border: none;
	border-radius: 8px;
	font-size: 16px;
	font-weight: 600;
	cursor: pointer;
	transition: background .15s ease;
}

.gvc-submit:hover {
	background: var(--gvc-primary-dark);
}

.gvc-results {
	margin-top: 24px;
	padding-top: 20px;
	border-top: 1px solid var(--gvc-border);
}

.gvc-results-title {
	margin: 0 0 14px;
	font-size: 16px;
}

.gvc-results-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 12px;
}

.gvc-result-card {
	background: #fff;
	border: 1px solid var(--gvc-border);
	border-radius: 10px;
	padding: 14px;
	text-align: center;
}

.gvc-result-value {
	display: block;
	font-size: 24px;
	font-weight: 700;
	color: var(--gvc-primary-dark);
	line-height: 1.2;
}

.gvc-result-label {
	display: block;
	font-size: 12px;
	color: #6b756a;
	text-transform: uppercase;
	letter-spacing: .04em;
	margin-top: 2px;
}

.gvc-note {
	margin: 14px 2px 0;
	font-size: 12.5px;
	color: #6b756a;
}

.gvc-error {
	color: #b3261e;
	font-size: 13px;
	margin-top: 4px;
}

@media (max-width: 420px) {
	.gvc-calculator {
		padding: 20px;
	}
	.gvc-dims {
		grid-template-columns: 1fr;
	}
}