/**
 * LensPair – dual-eye prescription selector.
 *
 * Colours and radii are exposed as custom properties so a theme can retune the
 * component without overriding selectors. Type is inherited from the theme.
 */

.lenspair {
	--lenspair-ink: #14181d;
	--lenspair-muted: #667080;
	--lenspair-line: #dde2e8;
	--lenspair-line-strong: #b9c1cb;
	--lenspair-surface: #fff;
	--lenspair-surface-sunken: #f6f8fa;
	--lenspair-accent: #0f6d8c;
	--lenspair-danger: #b3261e;
	--lenspair-success: #0f6b3f;
	--lenspair-radius: 10px;
	--lenspair-gap: 1rem;
	--lenspair-mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;

	margin: 0 0 1.75rem;
	color: var(--lenspair-ink);
}

/* Head ------------------------------------------------------------------ */

.lenspair__head {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	padding-bottom: 0.75rem;
	border-bottom: 1px solid var(--lenspair-line);
}

.lenspair__title {
	margin: 0;
	font-size: 0.9375rem;
	font-weight: 600;
	letter-spacing: 0.02em;
}

/* Eyes ------------------------------------------------------------------ */

.lenspair__eyes {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--lenspair-gap);
	margin-top: var(--lenspair-gap);
}

.lenspair--split .lenspair__eyes {
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lenspair__eye {
	padding: 0.875rem 1rem 1rem;
	background: var(--lenspair-surface);
	border: 1px solid var(--lenspair-line);
	border-radius: var(--lenspair-radius);
}

/* Only the eyes being ordered for are shown. */
.lenspair--enhanced .lenspair__eye[aria-hidden="true"] {
	display: none;
}

.lenspair__eye-label {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	margin: 0 0 0.75rem;
	font-size: 0.8125rem;
	font-weight: 600;
	color: var(--lenspair-muted);
}

/* With one prescription covering both eyes there is nothing to label. */
.lenspair--enhanced.lenspair--same .lenspair__eye-label {
	visibility: hidden;
	height: 0;
	margin: 0;
	overflow: hidden;
}

.lenspair__eye-badge {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 2.25rem;
	padding: 0.125rem 0.375rem;
	font-family: var(--lenspair-mono);
	font-size: 0.6875rem;
	font-weight: 700;
	letter-spacing: 0.08em;
	color: var(--lenspair-accent);
	background: var(--lenspair-surface-sunken);
	border: 1px solid var(--lenspair-line);
	border-radius: 4px;
}

/* Fields ---------------------------------------------------------------- */

.lenspair__fields {
	display: flex;
	flex-wrap: wrap;
	gap: 0.875rem 0.75rem;
	align-items: flex-start;
}

.lenspair__field {
	flex: 1 1 8rem;
	min-width: 0;
}

.lenspair__field-head {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	justify-content: space-between;
	gap: 0.5rem;
	margin-bottom: 0.3125rem;
	min-height: 1.1rem;
}

.lenspair__field-label {
	display: block;
	font-size: 0.75rem;
	font-weight: 600;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--lenspair-muted);
}

.lenspair__fields select {
	width: 100%;
	max-width: 100%;
	font-family: var(--lenspair-mono);
	font-variant-numeric: tabular-nums;
}

.lenspair__reset {
	flex: none;
	align-self: center;
	font-size: 0.75rem;
	color: var(--lenspair-muted);
	text-decoration: underline;
}

/* Quantity + variation -------------------------------------------------- */

.lenspair__variation:empty {
	display: none;
}

.lenspair__variation .price {
	font-size: 1rem;
	font-weight: 600;
}

.lenspair__eye-actions {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-end;
	gap: 0.75rem;
	margin-top: 0.75rem;
}

.lenspair__field--qty {
	flex: 0 0 6.5rem;
}

.lenspair__eye-actions .quantity {
	margin: 0;
}

/* The per-eye buttons are the no-JS fallback only. */
.lenspair--enhanced .lenspair__native-submit {
	display: none;
}

/* Footer ---------------------------------------------------------------- */

.lenspair__disclaimer {
	margin: 1rem 0 0;
	font-size: 0.75rem;
	line-height: 1.55;
	color: var(--lenspair-muted);
}

.lenspair__footer {
	margin-top: 1rem;
}

.lenspair__submit {
	width: 100%;
}

.lenspair__submit[disabled] {
	opacity: 0.45;
	cursor: not-allowed;
}

.lenspair--busy .lenspair__submit {
	opacity: 0.65;
}

.lenspair__notice {
	margin: 0.625rem 0 0;
	font-size: 0.8125rem;
	min-height: 1.2em;
}

.lenspair__notice:empty {
	display: none;
}

.lenspair__notice[data-type="error"] {
	color: var(--lenspair-danger);
}

.lenspair__notice[data-type="success"] {
	color: var(--lenspair-success);
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 600px) {
	.lenspair--split .lenspair__eyes {
		grid-template-columns: 1fr;
	}

	.lenspair__head {
		align-items: flex-start;
		flex-direction: column;
	}
}

@media (prefers-reduced-motion: reduce) {
	.lenspair__scope-label {
		transition: none;
	}
}

/* No prefers-color-scheme override here on purpose.
   The surrounding theme is light-only, so repainting just this component for a
   dark OS setting left near-white text and a washed-out accent sitting on the
   theme's white card. Retune the custom properties above if the theme ever
   gains a real dark mode. */


/* Field hints ------------------------------------------------------------- */

.lenspair__field-hint {
	margin: 0.3125rem 0 0;
	font-size: 0.6875rem;
	line-height: 1.4;
	color: var(--lenspair-muted);
}

/* A right-eye field that is currently copying the left. It is auto-filled, not
   locked — pick a different value here and the two eyes simply stop matching. */
.lenspair__field--following select {
	background-color: var(--lenspair-surface-sunken);
}

/* Single-choice attributes are a spec, not a decision. */
.lenspair__field--fixed select {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	white-space: nowrap;
}

.lenspair__fixed-value {
	margin: 0;
	padding: 0.3125rem 0;
	font-family: var(--lenspair-mono);
	font-size: 0.875rem;
	font-variant-numeric: tabular-nums;
}

.lenspair__field--color {
	flex-basis: 100%;
}

/* Scope control ----------------------------------------------------------- */

.lenspair__scope {
	display: flex;
	flex-wrap: wrap;
	gap: 0;
	margin: 0.875rem 0 0;
	padding: 0;
	border: 1px solid var(--lenspair-line-strong);
	border-radius: var(--lenspair-radius);
	overflow: hidden;
}

.lenspair__scope-input {
	position: absolute;
	width: 1px;
	height: 1px;
	opacity: 0;
	pointer-events: none;
}

.lenspair__scope-label {
	flex: 1 1 auto;
	padding: 0.5rem 0.75rem;
	font-size: 0.8125rem;
	font-weight: 500;
	text-align: center;
	white-space: nowrap;
	cursor: pointer;
	border-left: 1px solid var(--lenspair-line);
	transition: background 140ms ease, color 140ms ease;
}

.lenspair__scope-label:first-of-type {
	border-left: 0;
}

.lenspair__scope-input:checked + .lenspair__scope-label {
	color: #fff;
	background: var(--lenspair-accent);
}

.lenspair__scope-input:focus-visible + .lenspair__scope-label {
	outline: 2px solid var(--lenspair-accent);
	outline-offset: -2px;
}

/* Which eye --------------------------------------------------------------- */

.lenspair__which {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem;
	margin-top: 0.75rem;
}

.lenspair__which[hidden] {
	display: none;
}

.lenspair__which-label {
	font-size: 0.8125rem;
	color: var(--lenspair-muted);
}

.lenspair__which-input {
	position: absolute;
	width: 1px;
	height: 1px;
	opacity: 0;
	pointer-events: none;
}

.lenspair__which-option {
	padding: 0.3125rem 0.625rem;
	font-size: 0.8125rem;
	line-height: 1.4;
	cursor: pointer;
	color: var(--lenspair-ink);
	background: var(--lenspair-surface);
	border: 1px solid var(--lenspair-line-strong);
	border-radius: 999px;
}

.lenspair__which-input:checked + .lenspair__which-option {
	color: #fff;
	background: var(--lenspair-accent);
	border-color: var(--lenspair-accent);
}

.lenspair__which-input:focus-visible + .lenspair__which-option {
	outline: 2px solid var(--lenspair-accent);
	outline-offset: 2px;
}

@media (max-width: 480px) {
	.lenspair__scope {
		flex-direction: column;
	}

	.lenspair__scope-label {
		border-left: 0;
		border-top: 1px solid var(--lenspair-line);
	}

	.lenspair__scope-label:first-of-type {
		border-top: 0;
	}
}