/* RB Typing Test & Practice */

.rbtt {
	--p: var(--rbtt-primary, #2563eb);
	--ok: #16a34a;
	--bad: #dc2626;
	--warn: #f59e0b;
	--bg: #f8fafc;
	--card: #ffffff;
	--ink: #0f172a;
	--mut: #64748b;
	--line: #e2e8f0;
	--p-soft: color-mix(in srgb, var(--p) 10%, var(--card));
	--zoom: var(--rbtt-zoom, 1);
	--lh: calc(2.55rem * var(--zoom));
	--hindi: 'Noto Sans Devanagari', 'Nirmala UI', 'Mangal', 'Kohinoor Devanagari', sans-serif;

	box-sizing: border-box;
	max-width: 960px;
	margin: 1.5rem auto;
	padding: clamp(14px, 3vw, 28px);
	background: var(--bg);
	color: var(--ink);
	border: 1px solid var(--line);
	border-radius: 16px;
	font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Noto Sans Devanagari', sans-serif;
	font-size: 16px;
	line-height: 1.5;
}
.rbtt.is-dark {
	--bg: #0b1220;
	--card: #111a2e;
	--ink: #e5edfb;
	--mut: #94a3b8;
	--line: #25324d;
}
.rbtt *,
.rbtt *::before,
.rbtt *::after {
	box-sizing: border-box;
}
.rbtt h2,
.rbtt h3,
.rbtt p {
	margin: 0;
	color: inherit;
}
.rbtt table {
	width: 100%;
	border-collapse: collapse;
	margin: 0;
	font-size: 0.92rem;
}
.rbtt th,
.rbtt td {
	padding: 8px 10px;
	text-align: left;
	border: 0;
	border-bottom: 1px solid var(--line);
	background: transparent;
	color: inherit;
}
.rbtt th {
	color: var(--mut);
	font-weight: 600;
}

/* Hindi companion labels */
.rbtt .rbtt-hi {
	display: inline-block;
	margin-left: 0.4em;
	font-family: var(--hindi);
	font-size: 0.86em;
	font-weight: 400;
	opacity: 0.82;
}
.rbtt .rbtt-hi::before {
	content: '(';
}
.rbtt .rbtt-hi::after {
	content: ')';
}
.rbtt.rbtt-nohi .rbtt-hi {
	display: none;
}

/* Headings */
.rbtt .rbtt-head {
	margin-bottom: 18px;
}
.rbtt .rbtt-title {
	font-size: clamp(1.35rem, 3.4vw, 1.8rem);
	font-weight: 750;
	line-height: 1.2;
	letter-spacing: -0.01em;
}
.rbtt .rbtt-sub {
	margin-top: 6px;
	color: var(--mut);
}
.rbtt .rbtt-fine {
	margin-top: 8px;
	font-size: 0.84rem;
	color: var(--mut);
}
.rbtt .rbtt-loading {
	color: var(--mut);
	padding: 24px 0;
}
.rbtt .rbtt-best {
	display: inline-block;
	margin-top: 10px;
	padding: 4px 12px;
	border-radius: 999px;
	background: color-mix(in srgb, var(--warn) 18%, var(--card));
	color: var(--ink);
	font-weight: 650;
	border: 1px solid var(--warn);
}

/* Setup */
.rbtt .rbtt-row {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	margin-bottom: 18px;
}
.rbtt .rbtt-field {
	margin-bottom: 18px;
}
.rbtt .rbtt-field > label,
.rbtt .rbtt-lab {
	display: block;
	margin-bottom: 8px;
	font-weight: 650;
}
.rbtt select,
.rbtt textarea,
.rbtt input[type='number'] {
	width: 100%;
	max-width: 100%;
	padding: 11px 12px;
	border: 1px solid var(--line);
	border-radius: 10px;
	background: var(--card);
	color: var(--ink);
	font: inherit;
}
.rbtt select:focus-visible,
.rbtt textarea:focus-visible,
.rbtt input:focus-visible,
.rbtt button:focus-visible,
.rbtt summary:focus-visible {
	outline: 3px solid color-mix(in srgb, var(--p) 55%, transparent);
	outline-offset: 2px;
}

.rbtt .rbtt-seg {
	display: inline-flex;
	padding: 4px;
	gap: 4px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
}
.rbtt .rbtt-seg button {
	appearance: none;
	margin: 0;
	padding: 9px 16px;
	border: 0;
	border-radius: 9px;
	background: transparent;
	color: var(--ink);
	font: inherit;
	font-weight: 600;
	cursor: pointer;
}
.rbtt .rbtt-seg button.on {
	background: var(--p);
	color: #fff;
}
.rbtt .rbtt-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	align-items: center;
}
.rbtt .rbtt-chip {
	appearance: none;
	margin: 0;
	padding: 8px 14px;
	border: 1px solid var(--line);
	border-radius: 999px;
	background: var(--card);
	color: var(--ink);
	font: inherit;
	cursor: pointer;
}
.rbtt .rbtt-chip.on {
	border-color: var(--p);
	background: var(--p-soft);
	color: var(--p);
	font-weight: 650;
}
.rbtt .rbtt-custom {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	color: var(--mut);
}
.rbtt .rbtt-custom input {
	width: 88px;
	padding: 8px 10px;
	border-radius: 999px;
}
.rbtt .rbtt-checks {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 8px 16px;
}
.rbtt .rbtt-check {
	display: flex;
	align-items: center;
	gap: 8px;
	cursor: pointer;
}
.rbtt .rbtt-check input {
	width: 18px;
	height: 18px;
	margin: 0;
	accent-color: var(--p);
}
.rbtt .rbtt-fontrow {
	display: flex;
	align-items: center;
	gap: 14px;
}
.rbtt .rbtt-fontrow .rbtt-lab {
	margin: 0;
}
.rbtt .rbtt-msg {
	margin: 0 0 14px;
	padding: 10px 14px;
	border-radius: 10px;
	border: 1px solid var(--bad);
	background: color-mix(in srgb, var(--bad) 10%, var(--card));
}

/* Buttons */
.rbtt .rbtt-btn {
	appearance: none;
	margin: 0;
	padding: 11px 20px;
	border: 1px solid var(--p);
	border-radius: 10px;
	background: var(--p);
	color: #fff;
	font: inherit;
	font-weight: 650;
	line-height: 1.2;
	cursor: pointer;
	transition: filter 0.15s;
}
.rbtt .rbtt-btn:hover {
	filter: brightness(1.08);
}
.rbtt .rbtt-btn[disabled] {
	opacity: 0.6;
	cursor: wait;
}
.rbtt .rbtt-btn.ghost {
	background: var(--card);
	color: var(--p);
}
.rbtt .rbtt-go {
	width: 100%;
	padding: 15px 20px;
	font-size: 1.1rem;
}
.rbtt .rbtt-link {
	appearance: none;
	border: 0;
	background: none;
	color: var(--p);
	font: inherit;
	cursor: pointer;
	text-decoration: underline;
}

/* Typing screen */
.rbtt .rbtt-bar {
	display: flex;
	align-items: center;
	gap: 18px;
	flex-wrap: wrap;
	padding: 12px 16px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 14px;
}
.rbtt .rbtt-clock {
	position: relative;
	width: 64px;
	height: 64px;
	flex: none;
}
.rbtt .rbtt-clock svg {
	width: 64px;
	height: 64px;
	transform: rotate(-90deg);
}
.rbtt .rbtt-clock circle {
	fill: none;
	stroke-width: 6;
}
.rbtt .rbtt-clock .trk {
	stroke: var(--line);
}
.rbtt .rbtt-clock .val {
	stroke: var(--p);
	stroke-linecap: round;
	transition: stroke-dashoffset 0.25s linear;
}
.rbtt .rbtt-time {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 0.86rem;
	font-variant-numeric: tabular-nums;
}
.rbtt .rbtt-live {
	display: flex;
	gap: 22px;
	flex: 1 1 auto;
}
.rbtt .rbtt-live > div {
	display: flex;
	flex-direction: column;
}
.rbtt .rbtt-live b {
	font-size: 1.5rem;
	line-height: 1.1;
	font-variant-numeric: tabular-nums;
}
.rbtt .rbtt-live small {
	color: var(--mut);
	font-size: 0.78rem;
}
.rbtt .rbtt-bar-actions {
	display: flex;
	gap: 8px;
}
.rbtt .rbtt-bar-actions .rbtt-btn {
	padding: 9px 14px;
}
.rbtt .rbtt-track {
	height: 4px;
	margin: 10px 2px 14px;
	background: var(--line);
	border-radius: 4px;
	overflow: hidden;
}
.rbtt .rbtt-track i {
	display: block;
	width: 0;
	height: 100%;
	background: var(--p);
	transition: width 0.25s linear;
}

/* The passage sits on ruled paper, like an answer sheet. */
.rbtt .rbtt-passage {
	position: relative;
	max-height: calc(var(--lh) * 5 + 28px);
	overflow-y: auto;
	padding: 14px 20px;
	border: 1px solid var(--line);
	border-radius: 14px;
	background-color: var(--card);
	background-image: repeating-linear-gradient(to bottom, transparent 0, transparent calc(var(--lh) - 1px), var(--line) calc(var(--lh) - 1px), var(--line) var(--lh));
	background-attachment: local;
	background-position: 0 14px;
	font-size: calc(1.2rem * var(--zoom));
	line-height: var(--lh);
	text-align: left;
	cursor: text;
	scroll-behavior: smooth;
	user-select: none;
	-webkit-user-select: none;
}
.rbtt .rbtt-passage[lang='hi'] {
	font-family: var(--hindi);
}
.rbtt .rbtt-passage .w {
	border-radius: 5px;
	padding: 1px 0;
}
.rbtt .rbtt-passage .w.is-done {
	color: var(--mut);
}
.rbtt .rbtt-passage .w.is-cur {
	background: color-mix(in srgb, var(--p) 22%, transparent);
	color: var(--ink);
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--p) 22%, transparent);
}
.rbtt .rbtt-passage.show-mist .w.is-ok {
	color: var(--ok);
}
.rbtt .rbtt-passage.show-mist .w.is-bad {
	color: var(--bad);
	text-decoration: underline wavy var(--bad);
	text-underline-offset: 5px;
}
.rbtt .rbtt-passage.show-mist .w.is-cur-bad {
	background: color-mix(in srgb, var(--bad) 22%, transparent);
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--bad) 22%, transparent);
}
.rbtt .rbtt-passage .c-ok {
	color: var(--ok);
}
.rbtt .rbtt-passage .c-bad {
	color: var(--bad);
	font-weight: 700;
}
.rbtt .rbtt-passage .c-extra {
	text-decoration: line-through;
}
.rbtt .rbtt-passage .c-rest {
	color: var(--ink);
}
.rbtt .rbtt-input {
	display: block;
	margin-top: 14px;
	min-height: 150px;
	resize: vertical;
	font-size: calc(1.15rem * var(--zoom));
	line-height: 1.7;
	border-width: 2px;
	border-color: color-mix(in srgb, var(--p) 40%, var(--line));
}
.rbtt .rbtt-input[lang='hi'] {
	font-family: var(--hindi);
}
.rbtt .rbtt-input[readonly] {
	opacity: 0.7;
}

/* Result */
.rbtt .rbtt-tabs {
	display: inline-flex;
	gap: 4px;
	padding: 4px;
	margin-bottom: 16px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
}
.rbtt .rbtt-tabs button {
	appearance: none;
	margin: 0;
	padding: 9px 20px;
	border: 0;
	border-radius: 9px;
	background: transparent;
	color: var(--ink);
	font: inherit;
	font-weight: 650;
	cursor: pointer;
}
.rbtt .rbtt-tabs button.on {
	background: var(--p);
	color: #fff;
}
.rbtt .rbtt-tabpanel {
	display: none;
}
.rbtt .rbtt-tabpanel.on {
	display: block;
}
.rbtt .rbtt-panel-top {
	display: flex;
	align-items: center;
	gap: 22px;
	flex-wrap: wrap;
	margin-bottom: 16px;
	padding: 18px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 14px;
}
.rbtt .rbtt-gauge {
	position: relative;
	width: 230px;
	max-width: 100%;
	flex: none;
}
.rbtt .rbtt-gauge svg {
	display: block;
	width: 100%;
	height: auto;
}
.rbtt .rbtt-gauge path {
	fill: none;
	stroke-width: 16;
	stroke-linecap: round;
}
.rbtt .rbtt-gauge .g-trk {
	stroke: var(--line);
}
.rbtt .rbtt-gauge .g-val {
	stroke: var(--p);
	transition: stroke-dasharray 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.rbtt .rbtt-gauge .g-target {
	stroke: var(--warn);
	stroke-width: 4;
	stroke-linecap: round;
}
.rbtt .rbtt-gauge .g-num {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 4px;
	display: flex;
	flex-direction: column;
	align-items: center;
}
.rbtt .rbtt-gauge .g-num b {
	font-size: 2.3rem;
	line-height: 1;
	font-variant-numeric: tabular-nums;
}
.rbtt .rbtt-gauge .g-num small {
	margin-top: 2px;
	color: var(--mut);
	font-size: 0.78rem;
}
.rbtt .rbtt-grade {
	flex: 1 1 220px;
	display: flex;
	flex-direction: column;
	gap: 4px;
}
.rbtt .rbtt-grade b {
	font-size: 1.35rem;
}
.rbtt .rbtt-grade span {
	color: var(--mut);
}
.rbtt .rbtt-grade.ok b {
	color: var(--ok);
}
.rbtt .rbtt-grade.no b {
	color: var(--bad);
}
.rbtt .rbtt-tiles {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
	gap: 10px;
}
.rbtt .rbtt-tile {
	padding: 12px 14px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
}
.rbtt .rbtt-tile b {
	display: block;
	font-size: 1.5rem;
	line-height: 1.15;
	font-variant-numeric: tabular-nums;
}
.rbtt .rbtt-tile b i {
	margin-left: 4px;
	font-style: normal;
	font-size: 0.8rem;
	font-weight: 500;
	color: var(--mut);
}
.rbtt .rbtt-tile span {
	color: var(--mut);
	font-size: 0.84rem;
}
.rbtt .rbtt-verdicts {
	display: grid;
	gap: 8px;
	margin-bottom: 12px;
}
.rbtt .rbtt-verdict {
	display: flex;
	gap: 12px;
	align-items: flex-start;
	padding: 12px 14px;
	background: var(--card);
	border: 1px solid var(--line);
	border-left-width: 5px;
	border-radius: 12px;
}
.rbtt .rbtt-verdict.ok {
	border-left-color: var(--ok);
}
.rbtt .rbtt-verdict.no {
	border-left-color: var(--bad);
}
.rbtt .rbtt-verdict .vi {
	font-weight: 800;
}
.rbtt .rbtt-verdict.ok .vi {
	color: var(--ok);
}
.rbtt .rbtt-verdict.no .vi {
	color: var(--bad);
}
.rbtt .rbtt-verdict div {
	display: flex;
	flex-direction: column;
}
.rbtt .rbtt-verdict div span {
	color: var(--mut);
	font-size: 0.9rem;
}
.rbtt .rbtt-clean {
	margin-top: 16px;
	color: var(--ok);
	font-weight: 650;
}
.rbtt .rbtt-mist {
	margin-top: 16px;
	padding: 4px 14px 10px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 12px;
}
.rbtt .rbtt-mist summary {
	padding: 10px 0;
	font-weight: 650;
	cursor: pointer;
}
.rbtt .rbtt-scroll {
	overflow-x: auto;
}
.rbtt .rbtt-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	margin-top: 18px;
}

/* History */
.rbtt .rbtt-hist {
	margin-top: 24px;
	padding: 16px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: 14px;
}
.rbtt .rbtt-hist-top {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 10px;
}
.rbtt .rbtt-hist h3 {
	font-size: 1.05rem;
}
.rbtt .rbtt-hist-sum {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 22px;
	margin-bottom: 8px;
}
.rbtt .rbtt-hist-sum > div {
	display: flex;
	flex-direction: column;
}
.rbtt .rbtt-hist-sum b {
	font-size: 1.4rem;
	line-height: 1.1;
}
.rbtt .rbtt-hist-sum span {
	color: var(--mut);
	font-size: 0.8rem;
}
.rbtt .rbtt-spark {
	width: 220px;
	height: 44px;
}
.rbtt .rbtt-spark polyline {
	fill: none;
	stroke: var(--p);
	stroke-width: 2.5;
	stroke-linejoin: round;
	stroke-linecap: round;
}

/* Ads */
.rbtt .rbtt-ad {
	margin: 14px 0;
	text-align: center;
	overflow: hidden;
}
.rbtt .rbtt-ad-label {
	display: block;
	margin-bottom: 4px;
	color: var(--mut);
	font-size: 0.7rem;
}
.rbtt.hide-ads-typing.is-typing .rbtt-ad {
	display: none;
}

/* Small screens */
@media (max-width: 600px) {
	.rbtt .rbtt-live {
		gap: 16px;
	}
	.rbtt .rbtt-bar-actions {
		width: 100%;
	}
	.rbtt .rbtt-bar-actions .rbtt-btn {
		flex: 1;
	}
	.rbtt .rbtt-passage {
		padding: 12px 14px;
	}
	.rbtt .rbtt-tabs {
		display: flex;
	}
	.rbtt .rbtt-tabs button {
		flex: 1;
		padding: 9px 8px;
	}
	.rbtt .rbtt-actions .rbtt-btn {
		flex: 1 1 100%;
	}
}

@media (prefers-reduced-motion: reduce) {
	.rbtt .rbtt-gauge .g-val,
	.rbtt .rbtt-clock .val,
	.rbtt .rbtt-track i {
		transition: none;
	}
	.rbtt .rbtt-passage {
		scroll-behavior: auto;
	}
}

/* Print only the result, with all three tabs. */
@media print {
	body * {
		visibility: hidden;
	}
	.rbtt .rbtt-result,
	.rbtt .rbtt-result * {
		visibility: visible;
	}
	.rbtt .rbtt-result {
		position: absolute;
		left: 0;
		top: 0;
		width: 100%;
	}
	.rbtt .rbtt-tabpanel {
		display: block !important;
		margin-bottom: 16px;
	}
	.rbtt .rbtt-tabs,
	.rbtt .rbtt-actions,
	.rbtt .rbtt-adhere,
	.rbtt .rbtt-hist,
	.rbtt .rbtt-ad {
		display: none !important;
	}
}

/* Fallbacks for browsers without color-mix() */
@supports not (color: color-mix(in srgb, red, blue)) {
	.rbtt {
		--p-soft: #e8f0fe;
	}
	.rbtt .rbtt-passage .w.is-cur {
		background: #dbe7ff;
		box-shadow: 0 0 0 3px #dbe7ff;
	}
	.rbtt .rbtt-passage.show-mist .w.is-cur-bad {
		background: #fde2e2;
		box-shadow: 0 0 0 3px #fde2e2;
	}
	.rbtt .rbtt-msg {
		background: #fde2e2;
	}
	.rbtt .rbtt-best {
		background: #fef3c7;
	}
	.rbtt .rbtt-input {
		border-color: #93b4f5;
	}
}

/* Full page test view */
html.rbtt-lock {
	overflow: hidden;
}
.rbtt .rbtt-side,
.rbtt .rbtt-exit {
	display: none;
}
.rbtt.is-full {
	position: fixed;
	inset: 0;
	z-index: 999999;
	max-width: none;
	margin: 0;
	padding: 56px clamp(14px, 3vw, 32px) 32px;
	border: 0;
	border-radius: 0;
	overflow-y: auto;
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	justify-content: center;
	align-content: start;
	gap: 20px;
}
.rbtt.is-full.has-side {
	grid-template-columns: minmax(0, 980px) 180px;
}
.rbtt.is-full .rbtt-app {
	min-width: 0;
}
.rbtt.is-full .rbtt-ad-top,
.rbtt.is-full .rbtt-ad-bottom {
	display: none;
}
.rbtt.is-full .rbtt-exit {
	display: inline-flex;
	align-items: center;
	position: fixed;
	top: 12px;
	right: 16px;
	z-index: 2;
	padding: 8px 14px;
	border: 1px solid var(--line);
	border-radius: 999px;
	background: var(--card);
	color: var(--ink);
	font: inherit;
	font-weight: 600;
	cursor: pointer;
}
.rbtt.is-full .rbtt-exit:hover {
	border-color: var(--p);
	color: var(--p);
}
.rbtt.is-full .rbtt-side {
	display: block;
	position: sticky;
	top: 0;
	align-self: start;
	width: 180px;
	min-height: 120px;
}
.rbtt .rbtt-sidead {
	text-align: center;
	overflow: hidden;
}
.rbtt.is-full .rbtt-passage {
	max-height: calc(var(--lh) * 6 + 28px);
}
@media (max-width: 1160px) {
	.rbtt.is-full.has-side {
		grid-template-columns: minmax(0, 1fr);
	}
	.rbtt.is-full .rbtt-side {
		display: none;
	}
}

.rbtt .rbtt-chip small {
	opacity: 0.75;
}
.rbtt .rbtt-chip[disabled] {
	opacity: 0.45;
	cursor: not-allowed;
}

/* Dropdowns: stop themes from clipping the text (tall Hindi letters, fixed heights) */
.rbtt select {
	height: auto !important;
	min-height: 52px;
	padding: 12px 38px 12px 14px !important;
	font-size: 1.1rem !important;
	line-height: 1.7 !important;
	font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Noto Sans Devanagari', 'Nirmala UI', 'Mangal', sans-serif;
	text-overflow: ellipsis;
	overflow: hidden;
	white-space: nowrap;
}
.rbtt select option {
	font-size: 1.05rem;
	line-height: 1.7;
	padding: 6px 10px;
	white-space: normal;
}
.rbtt .rbtt-field > label,
.rbtt .rbtt-lab {
	font-size: 1.1rem;
}

/* Taller dropdowns and inputs: stops theme styles from clipping the text (Hindi especially). */
.rbtt select,
.rbtt input[type='number'] {
	height: auto !important;
	min-height: 52px !important;
	padding: 12px 14px !important;
	line-height: 1.6 !important;
	font-size: 1rem !important;
	font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', 'Noto Sans Devanagari', 'Nirmala UI', 'Mangal', sans-serif;
	overflow: visible;
	text-overflow: ellipsis;
}
.rbtt select {
	padding-right: 36px !important;
	cursor: pointer;
}
.rbtt select option {
	line-height: 1.6;
	padding: 8px 10px;
}
.rbtt .rbtt-custom input[type='number'] {
	min-height: 44px !important;
	padding: 8px 12px !important;
}