/* Research Unit Converter — all styles scoped under .ruc-widget so they
   never leak into or collide with the host theme. */

.ruc-widget {
	--ruc-accent: #4A90E2;
	--ruc-accent-dark: #357ABD;
	--ruc-bg: #ffffff;
	--ruc-panel: #f6f8fb;
	--ruc-border: #e2e8f0;
	--ruc-text: #1a2433;
	--ruc-muted: #64748b;
	--ruc-radius: 14px;

	box-sizing: border-box;
	max-width: 460px;
	margin: 0 auto;
	padding: 22px;
	background: var(--ruc-bg);
	border: 1px solid var(--ruc-border);
	border-radius: var(--ruc-radius);
	box-shadow: 0 6px 24px rgba(26, 36, 51, 0.06);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	color: var(--ruc-text);
}

.ruc-widget *,
.ruc-widget *::before,
.ruc-widget *::after {
	box-sizing: border-box;
}

/* Segmented tab control (phone-calculator style). Wraps to multiple rows
   so all categories stay visible and nothing gets clipped. */
.ruc-tabs {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 4px;
	padding: 4px;
	background: var(--ruc-panel);
	border-radius: 10px;
	margin-bottom: 20px;
}

.ruc-tab {
	flex: 1 1 auto;
	appearance: none;
	border: none;
	background: transparent;
	color: var(--ruc-muted);
	font-size: 13.5px;
	font-weight: 600;
	padding: 9px 12px;
	border-radius: 8px;
	cursor: pointer;
	white-space: nowrap;
	transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
	font-family: inherit;
}

.ruc-tab:hover {
	color: var(--ruc-text);
}

.ruc-tab.is-active {
	background: var(--ruc-bg);
	color: var(--ruc-accent);
	box-shadow: 0 1px 3px rgba(26, 36, 51, 0.12);
}

.ruc-tab:focus-visible {
	outline: 2px solid var(--ruc-accent);
	outline-offset: 2px;
}

/* Input row.
   Themes (especially WooCommerce ones) apply broad rules like
   `select { width: 100% }` or `input { height: 42px; margin-bottom: 20px }`.
   The declarations below are forced so the layout holds on any theme:
   the input takes all remaining space, the select is capped. */
.ruc-input-row {
	display: flex;
	flex-wrap: nowrap;
	align-items: stretch;
	gap: 10px;
	margin-bottom: 12px;
	width: 100%;
}

.ruc-widget .ruc-input {
	flex: 1 1 auto !important;
	width: auto !important;
	min-width: 0 !important;
	max-width: none !important;
	height: auto !important;
	min-height: 0 !important;
	line-height: 1.3 !important;
	margin: 0 !important;
	font-size: 26px;
	font-weight: 600;
	padding: 12px 14px;
	border: 1px solid var(--ruc-border);
	border-radius: 10px;
	background: var(--ruc-bg);
	color: var(--ruc-text);
	font-family: inherit;
	box-shadow: none;
	transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.ruc-input::placeholder {
	color: #c2cbd8;
	opacity: 1;
}

.ruc-widget .ruc-input:focus {
	outline: none;
	border-color: var(--ruc-accent);
	box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
}

.ruc-widget .ruc-unit-select {
	flex: 0 0 auto !important;
	width: auto !important;
	min-width: 104px !important;
	max-width: 140px !important;
	height: auto !important;
	min-height: 0 !important;
	line-height: 1.3 !important;
	margin: 0 !important;
	font-size: 15px;
	font-weight: 600;
	padding: 12px 34px 12px 14px;
	border: 1px solid var(--ruc-border);
	border-radius: 10px;
	background-color: var(--ruc-bg);
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234A90E2' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") !important;
	background-repeat: no-repeat !important;
	background-position: right 12px center !important;
	background-size: 12px 8px !important;
	color: var(--ruc-text);
	cursor: pointer;
	box-shadow: none;
	appearance: none !important;
	-webkit-appearance: none !important;
	-moz-appearance: none !important;
	font-family: inherit;
	text-overflow: ellipsis;
}

.ruc-widget .ruc-unit-select:focus {
	outline: none;
	border-color: var(--ruc-accent);
	box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
}

/* Clear button */
.ruc-clear {
	display: inline-block;
	appearance: none;
	border: none;
	background: transparent;
	color: var(--ruc-accent);
	font-size: 13px;
	font-weight: 600;
	padding: 4px 2px;
	margin-bottom: 14px;
	cursor: pointer;
	font-family: inherit;
}

.ruc-clear:hover {
	color: var(--ruc-accent-dark);
	text-decoration: underline;
}

.ruc-clear:focus-visible {
	outline: 2px solid var(--ruc-accent);
	outline-offset: 2px;
	border-radius: 4px;
}

/* Results */
.ruc-results {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--ruc-border);
}

.ruc-result-row {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 12px;
	padding: 13px 4px;
	border-bottom: 1px solid var(--ruc-border);
}

.ruc-result-value {
	font-size: 20px;
	font-weight: 600;
	color: var(--ruc-text);
	font-variant-numeric: tabular-nums;
	word-break: break-all;
	text-align: left;
}

.ruc-result-unit {
	flex: 0 0 auto;
	font-size: 13px;
	font-weight: 600;
	color: var(--ruc-muted);
	white-space: nowrap;
}

.ruc-note {
	margin: 14px 0 0;
	font-size: 12px;
	line-height: 1.5;
	color: var(--ruc-muted);
	min-height: 1em;
}

/* Small screens */
@media (max-width: 420px) {
	.ruc-widget { padding: 16px; }
	.ruc-widget .ruc-input { font-size: 22px; padding: 11px 12px; }
	.ruc-widget .ruc-unit-select {
		min-width: 88px !important;
		max-width: 110px !important;
		font-size: 14px;
		padding: 11px 30px 11px 12px;
	}
	.ruc-result-value { font-size: 18px; }
	.ruc-tab { font-size: 12.5px; padding: 8px 9px; }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
	.ruc-tab,
	.ruc-input,
	.ruc-unit-select {
		transition: none;
	}
}