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

	max-width: 540px;
	margin: 24px 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	box-sizing: border-box;
}

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

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

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

.atc-header-icon {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 26px;
	border-radius: 8px;
	border: 1.5px solid var(--atc-teal);
	color: var(--atc-teal);
	font-size: 15px;
	font-weight: 700;
	flex-shrink: 0;
}

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

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

.atc-label {
	display: block;
	font-size: 10.5px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--atc-text-soft);
	margin-bottom: 7px;
}

.atc-formula-label,
.atc-activity-label,
.atc-goal-label,
.atc-macro-label {
	margin-top: 16px;
}

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

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

.atc-select {
	width: 100%;
	appearance: none;
	-webkit-appearance: none;
	background-image: linear-gradient(45deg, transparent 50%, var(--atc-navy) 50%), linear-gradient(135deg, var(--atc-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: 600;
}

.atc-seg-group {
	display: flex;
	gap: 4px;
	background: var(--atc-panel);
	border: 1px solid var(--atc-border);
	border-radius: 10px;
	padding: 4px;
}

.atc-sex-group {
	margin-bottom: 16px;
}

.atc-seg-btn {
	flex: 1;
	padding: 10px 8px;
	font-size: 12px;
	font-weight: 700;
	font-family: inherit;
	border: none;
	border-radius: 7px;
	background: transparent;
	color: var(--atc-text-soft);
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease;
}

.atc-seg-btn-sm {
	padding: 8px 10px;
	font-size: 10.5px;
}

.atc-seg-btn:hover {
	background: var(--atc-panel-hover);
	color: #ffffff;
}

.atc-seg-btn.is-active {
	background: var(--atc-teal);
	color: #06231f;
}

.atc-field-row {
	display: flex;
	gap: 10px;
	margin-bottom: 12px;
}

.atc-field {
	flex: 1;
	min-width: 0;
}

.atc-field .atc-input {
	width: 100%;
}

.atc-unit-input {
	display: flex;
	gap: 8px;
	align-items: stretch;
}

.atc-unit-input .atc-input {
	flex: 1;
	min-width: 0;
}

.atc-unit-input .atc-seg-group {
	flex: 0 0 auto;
}

.atc-bodyfat-row {
	margin-top: 14px;
}

.atc-bodyfat-row .atc-input {
	width: 100%;
}

.atc-goal-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 6px;
}

.atc-goal-btn {
	padding: 9px 4px;
	font-size: 10.5px;
	font-weight: 700;
	font-family: inherit;
	border: 1px solid var(--atc-border);
	border-radius: 8px;
	background: var(--atc-panel);
	color: var(--atc-text-soft);
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.atc-goal-btn:hover {
	background: var(--atc-panel-hover);
	color: #ffffff;
}

.atc-goal-btn.is-active {
	background: rgba(45, 212, 191, 0.14);
	border-color: var(--atc-teal);
	color: var(--atc-teal);
}

.atc-example-note {
	margin: 14px 0 0;
	font-size: 11.5px;
	font-style: italic;
	color: var(--atc-teal);
}

.atc-button-row {
	display: flex;
	gap: 10px;
	margin-top: 14px;
}

.atc-btn {
	flex: 1;
	padding: 12px 18px;
	font-size: 14px;
	font-weight: 700;
	font-family: inherit;
	border: none;
	border-radius: 10px;
	cursor: pointer;
	transition: background 0.15s ease, transform 0.05s ease;
}

.atc-btn-primary {
	background: var(--atc-teal);
	color: #06231f;
}

.atc-btn-primary:hover {
	background: var(--atc-teal-deep);
}

.atc-btn-ghost {
	background: var(--atc-panel);
	color: #ffffff;
	border: 1px solid var(--atc-border);
}

.atc-btn-ghost:hover {
	background: var(--atc-panel-hover);
}

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

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

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

.atc-caution {
	margin: 12px 0 0;
	padding: 10px 12px;
	font-size: 12px;
	font-weight: 600;
	line-height: 1.5;
	color: #ffcf8a;
	background: rgba(255, 173, 51, 0.1);
	border: 1px solid rgba(255, 173, 51, 0.35);
	border-radius: 8px;
}

/* Results */
.atc-results:not(.has-result) {
	display: none;
}

.atc-stat-grid-top {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 10px;
	margin-top: 22px;
}

.atc-stat-box {
	background: var(--atc-panel);
	border: 1px solid var(--atc-border);
	border-radius: 12px;
	padding: 12px 10px;
	text-align: center;
}

.atc-stat-label {
	display: block;
	font-size: 9.5px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.03em;
	color: var(--atc-text-soft);
	margin-bottom: 6px;
}

.atc-stat-value {
	display: block;
	font-size: 16px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	color: #ffffff;
}

.atc-target-box {
	text-align: center;
	margin-top: 10px;
	padding: 16px;
	background: var(--atc-panel);
	border: 1px solid var(--atc-teal);
	border-radius: 12px;
}

.atc-target-label {
	display: block;
	font-size: 10px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--atc-text-soft);
	margin-bottom: 8px;
}

.atc-target-value {
	display: block;
	font-size: 28px;
	font-weight: 800;
	font-variant-numeric: tabular-nums;
	letter-spacing: -0.02em;
	color: var(--atc-teal);
}

/* Macro sliders */
.atc-macro-section {
	margin-top: 22px;
}

.atc-macro-row {
	display: grid;
	grid-template-columns: 55px 1fr 42px;
	align-items: center;
	gap: 10px;
	margin-bottom: 10px;
}

.atc-macro-name {
	font-size: 11px;
	font-weight: 700;
	color: #ffffff;
}

.atc-macro-readout {
	font-size: 12px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	color: var(--atc-teal);
	text-align: right;
}

.atc-slider {
	width: 100%;
	height: 6px;
	border-radius: 3px;
	background: var(--atc-panel);
	cursor: pointer;
}

.atc-slider-protein {
	accent-color: #2dd4bf;
}

.atc-slider-carb {
	accent-color: #60a5fa;
}

.atc-slider-fat {
	accent-color: #fbbf24;
}

.atc-macro-grams {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 8px;
	margin-top: 14px;
}

.atc-macro-gram-box {
	background: var(--atc-panel);
	border: 1px solid var(--atc-border);
	border-radius: 10px;
	padding: 10px 6px;
	text-align: center;
}

.atc-macro-gram-value {
	display: block;
	font-size: 16px;
	font-weight: 800;
	font-variant-numeric: tabular-nums;
	color: #ffffff;
}

.atc-macro-gram-label {
	display: block;
	font-size: 9.5px;
	color: var(--atc-text-soft);
	margin-top: 3px;
}

/* Reference tables */
.atc-reference-section {
	margin-top: 26px;
}

.atc-section-title {
	margin: 0 0 10px;
	font-size: 12px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--atc-text-soft);
}

.atc-reference-title-2 {
	margin-top: 18px;
}

.atc-reference-wrap {
	overflow-x: auto;
	border: 1px solid var(--atc-border);
	border-radius: 10px;
}

.atc-reference-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 11.5px;
}

.atc-reference-table thead th {
	background: var(--atc-panel);
	color: var(--atc-teal);
	font-size: 10px;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.02em;
	padding: 8px 10px;
	text-align: left;
	border-bottom: 1px solid var(--atc-border);
}

.atc-reference-table tbody td {
	padding: 7px 10px;
	color: #ffffff;
	border-bottom: 1px solid var(--atc-border);
}

.atc-reference-table tbody tr:last-child td {
	border-bottom: none;
}

.atc-reference-table tbody tr:nth-child(even) {
	background: var(--atc-panel);
}

.atc-reference-table tr.atc-reference-active td {
	color: var(--atc-teal);
	font-weight: 700;
}

.atc-disclaimer {
	margin: 20px 0 0;
	font-size: 10px;
	color: var(--atc-text-soft);
	line-height: 1.5;
	text-align: center;
}

@media (max-width: 420px) {
	.atc-goal-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.atc-macro-row {
		grid-template-columns: 48px 1fr 38px;
		gap: 6px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.atc-btn,
	.atc-seg-btn,
	.atc-goal-btn {
		transition: none;
	}
}