.itg-calculator {
	--itg-navy: #0b1526;
	--itg-panel: #142238;
	--itg-panel-hover: #1b2c47;
	--itg-border: #223452;
	--itg-text-soft: #7c8aa6;
	--itg-teal: #2dd4bf;
	--itg-teal-deep: #26b3a1;

	max-width: 620px;
	margin: 24px 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	box-sizing: border-box;
}

.itg-calculator *,
.itg-calculator *::before,
.itg-calculator *::after {
	box-sizing: inherit;
}

.itg-panel {
	background: var(--itg-navy);
	border: 1px solid var(--itg-border);
	border-radius: 18px;
	overflow: hidden;
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.itg-header {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 18px 22px;
	border-bottom: 1px solid var(--itg-border);
}

.itg-header-icon {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 26px;
	border-radius: 8px;
	border: 1.5px solid var(--itg-teal);
	color: var(--itg-teal);
	font-size: 16px;
	font-weight: 700;
	flex-shrink: 0;
}

.itg-heading {
	margin: 0;
	font-size: 16px;
	font-weight: 700;
	color: #ffffff;
	letter-spacing: -0.01em;
}

.itg-body {
	padding: 20px 22px 22px;
}

.itg-field-row {
	display: flex;
	gap: 10px;
}

.itg-field {
	min-width: 0;
}

.itg-field-grow {
	flex: 1;
}

.itg-field:not(.itg-field-grow) {
	flex: 0 0 130px;
}

.itg-label {
	display: block;
	font-size: 10.5px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--itg-text-soft);
	margin-bottom: 6px;
}

.itg-input {
	width: 100%;
	padding: 11px 12px;
	font-size: 14px;
	font-family: inherit;
	font-variant-numeric: tabular-nums;
	border: none;
	background: #ffffff;
	border-radius: 10px;
	color: var(--itg-navy);
	transition: box-shadow 0.15s ease;
}

.itg-input::placeholder {
	color: #9aa4b5;
}

.itg-input:focus {
	outline: none;
	box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.45);
}

.itg-select {
	appearance: none;
	-webkit-appearance: none;
	background-image: linear-gradient(45deg, transparent 50%, var(--itg-navy) 50%), linear-gradient(135deg, var(--itg-navy) 50%, transparent 50%);
	background-position: calc(100% - 16px) center, calc(100% - 11px) center;
	background-size: 5px 5px, 5px 5px;
	background-repeat: no-repeat;
	padding-right: 30px;
	font-weight: 700;
}

.itg-meta-row {
	display: flex;
	gap: 8px;
	margin-top: 12px;
	flex-wrap: wrap;
}

.itg-meta-badge {
	font-size: 11px;
	font-weight: 600;
	color: var(--itg-text-soft);
	background: var(--itg-panel);
	border: 1px solid var(--itg-border);
	border-radius: 20px;
	padding: 5px 12px;
}

.itg-plot-btn {
	width: 100%;
	margin-top: 14px;
	padding: 12px 18px;
	font-size: 14px;
	font-weight: 700;
	font-family: inherit;
	border: none;
	border-radius: 10px;
	cursor: pointer;
	background: var(--itg-teal);
	color: #06231f;
	transition: background 0.15s ease, transform 0.05s ease;
}

.itg-plot-btn:hover {
	background: var(--itg-teal-deep);
}

.itg-plot-btn:active {
	transform: translateY(1px);
}

.itg-plot-btn:focus-visible {
	outline: 2px solid var(--itg-teal);
	outline-offset: 2px;
}

.itg-error {
	min-height: 16px;
	margin: 12px 0 0;
	font-size: 13px;
	font-weight: 600;
	color: #ff9d8a;
}

.itg-graph-wrap {
	margin-top: 18px;
	background: var(--itg-panel);
	border: 1px solid var(--itg-border);
	border-radius: 12px;
	padding: 8px;
}

.itg-svg {
	display: block;
	width: 100%;
	height: auto;
}

.itg-axis {
	stroke: var(--itg-text-soft);
	stroke-width: 1.5;
}

.itg-tick {
	stroke: var(--itg-text-soft);
	stroke-width: 1;
}

.itg-tick-label {
	fill: var(--itg-text-soft);
	font-size: 10px;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.itg-asymptote {
	stroke: var(--itg-border);
	stroke-width: 1.5;
	stroke-dasharray: 5 4;
}

.itg-curve {
	fill: none;
	stroke: var(--itg-teal);
	stroke-width: 3;
	stroke-linecap: round;
	stroke-linejoin: round;
}

.itg-point {
	fill: #ffffff;
	stroke: var(--itg-teal);
	stroke-width: 2.5;
}

.itg-point-label {
	fill: #ffffff;
	font-size: 12px;
	font-weight: 700;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.itg-point-readout {
	margin: 10px 0 0;
	font-size: 13px;
	font-weight: 600;
	color: var(--itg-teal);
	text-align: center;
	min-height: 16px;
}

@media (max-width: 400px) {
	.itg-field-row {
		flex-wrap: wrap;
	}

	.itg-field:not(.itg-field-grow) {
		flex: 1 1 100%;
	}
}

@media (prefers-reduced-motion: reduce) {
	.itg-plot-btn {
		transition: none;
	}
}