:root {
	--primary: #2e3fb1;
	--border-color: #e2e8f0;
	--text-main: #1e293b;
	--text-muted: #64748b;
	--input-bg: #e0f2fe;
	--btn-calculate-bg: #1e293b;
	--result-box-bg: #e0f2fe;
}

.calc-tool-container { max-width: 600px; margin: 0 auto; }

.calc-card {
	background: white;
	border: 1px solid var(--border-color);
	border-radius: 12px;
	padding: 24px;
	margin-bottom: 24px;
}

.calc-card-title {
	text-align: center;
	padding: 20px 24px;
}

.calc-main-title {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--text-main);
	margin: 0;
}

.form-group {
	margin-bottom: 16px;
}

.form-group:last-child {
	margin-bottom: 0;
}

.form-group label {
	display: block;
	font-size: 0.875rem;
	font-weight: 500;
	margin-bottom: 6px;
	color: var(--text-main);
}

.date-input-wrapper {
	position: relative;
}

.date-input {
	width: 100%;
	padding: 10px 14px 10px 12px;
	border: 1px solid var(--border-color);
	border-radius: 10px;
	font-size: 1rem;
	background: var(--input-bg);
	color: var(--text-main);
}

.date-input:focus {
	outline: none;
	border-color: var(--primary);
}

.date-input::-webkit-calendar-picker-indicator {
	cursor: pointer;
	opacity: 0.7;
}

.period-row {
	margin-bottom: 16px;
}

.period-row:last-of-type {
	margin-bottom: 0;
}

.period-inputs {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
}

@media (max-width: 576px) {
	.period-inputs {
		grid-template-columns: 1fr;
	}
}

.add-period-wrap {
	margin-top: 16px;
	padding-top: 16px;
	border-top: 1px solid var(--border-color);
}

.btn-add-period {
	background: none;
	border: none;
	color: var(--primary);
	font-size: 0.9rem;
	font-weight: 500;
	cursor: pointer;
	padding: 0;
	text-decoration: none;
}

.btn-add-period:hover {
	text-decoration: underline;
}

.calc-actions {
	display: flex;
	justify-content: center;
	padding: 20px 24px;
}

.btn-calculate {
	display: inline-block;
	padding: 14px 40px;
	background: var(--btn-calculate-bg);
	color: white;
	border: none;
	border-radius: 10px;
	font-size: 1rem;
	font-weight: 600;
	cursor: pointer;
}

.btn-calculate:hover {
	background: #334155;
}

.calc-result {
	background: white;
	border: 1px solid var(--border-color);
	border-radius: 12px;
	padding: 24px;
	text-align: center;
}

.calc-result .result-label {
	font-size: 0.95rem;
	color: var(--text-main);
	margin-bottom: 16px;
}

.result-boxes {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 12px;
}

.result-box {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	min-width: 100px;
	padding: 16px 20px;
	background: var(--result-box-bg);
	border-radius: 10px;
	border: 1px solid #bae6fd;
}

.result-box .result-value {
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--text-main);
	line-height: 1.2;
}

.result-box .result-unit {
	font-size: 0.8rem;
	color: var(--text-muted);
	margin-top: 4px;
}

.result-error {
	font-size: 0.875rem;
	color: #dc2626;
	margin-top: 12px;
}

.calc-info {
	font-size: 0.85rem;
	color: var(--text-muted);
	margin-top: 16px;
	padding-top: 16px;
	border-top: 1px solid var(--border-color);
}