/* Link to NetEra Games: game engine styles (v0.5).

   The launcher card and the Games-page cards use the theme's tokens, so they
   follow the green and light themes. The full-screen stage is the site's own
   deep-green "console": the schematic grid and acid accent from the homepage,
   JetBrains Mono for anything keyed or counted, a route of hops for progress,
   and a terminal prompt for typed answers. Right / wrong always come with an
   icon and words, never colour alone. */

.ltn-arc__empty { padding: var(--sp-3); color: var(--text-muted); }
.ltn-arc-sr {
	position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
	overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.ltn-arc-btn-icon { display: inline-flex; }
.ltn-arc-btn-icon svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

/* ---- launcher, in the page ----------------------------------------------- */

.ltn-arc-launch {
	display: grid;
	grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--r-lg);
	overflow: hidden;
	box-shadow: var(--shadow-sm);
}
.ltn-arc-launch:not(:has(.ltn-arc-launch__cover)) { grid-template-columns: 1fr; }
@media (max-width: 720px) { .ltn-arc-launch { grid-template-columns: 1fr; } }

.ltn-arc-launch__cover {
	display: flex; align-items: center; justify-content: center;
	min-height: 240px;
	background: var(--code-bg);
}
.ltn-arc-launch__cover img { display: block; width: 100%; height: 100%; max-height: 380px; object-fit: contain; }

.ltn-arc-launch__body {
	display: flex; flex-direction: column; justify-content: center; gap: var(--sp-2);
	padding: clamp(var(--sp-3), 4vw, var(--sp-5));
}
.ltn-arc-launch__kicker {
	margin: 0;
	font-family: var(--font-mono); font-size: var(--fs-xs);
	letter-spacing: var(--track-wide); text-transform: uppercase;
	color: var(--accent);
}
.ltn-arc-launch__title {
	margin: 0;
	font-family: var(--font-head); font-size: var(--fs-2xl); line-height: var(--lh-tight);
	letter-spacing: var(--track-tight); color: var(--text);
}
.ltn-arc-launch__note { margin: 0; color: var(--text-muted); line-height: var(--lh-body); }
.ltn-arc-launch__meter { height: 8px; border-radius: var(--r-pill); background: var(--surface-alt); overflow: hidden; }
.ltn-arc-launch__meter > span { display: block; height: 100%; background: var(--accent); border-radius: inherit; }
.ltn-arc-launch__actions { display: flex; flex-wrap: wrap; gap: var(--sp-1) var(--sp-2); margin-top: var(--sp-1); }
.ltn-arc-play { min-width: 160px; justify-content: center; gap: 8px; }

/* ---- the stage: the site's deep-green console ---------------------------- */

.ltn-arc-lock, .ltn-arc-lock body { overflow: hidden; }

.ltn-arc-stage {
	position: fixed; inset: 0;
	z-index: 100000; /* above the site header, and the admin bar for editors */
	display: flex; flex-direction: column;
	height: 100vh; height: 100dvh;
	overflow: hidden;
	color: #F2F6F3;
	background: #0B1A16;
	font-family: var(--font-body);
	-webkit-tap-highlight-color: transparent;
}
.ltn-arc-stage__bg {
	position: absolute; inset: 0; pointer-events: none;
	background:
		radial-gradient(900px 560px at 88% -12%, rgba(125, 242, 200, 0.15), transparent 60%),
		radial-gradient(760px 520px at -8% 112%, rgba(139, 125, 255, 0.13), transparent 62%),
		linear-gradient(to right, rgba(242, 246, 243, 0.035) 1px, transparent 1px) 0 0 / 32px 32px,
		linear-gradient(to bottom, rgba(242, 246, 243, 0.035) 1px, transparent 1px) 0 0 / 32px 32px,
		#0B1A16;
}

.ltn-arc-stage__top {
	position: relative;
	display: flex; align-items: center; gap: 16px;
	padding: 12px clamp(14px, 3vw, 28px);
	border-bottom: 1px solid rgba(242, 246, 243, 0.07);
	background: rgba(11, 26, 22, 0.6);
}
.ltn-arc-stage__title {
	flex: 0 1 auto; max-width: 24%;
	font-family: var(--font-head); font-weight: 700; font-size: 1rem;
	white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.ltn-arc-stage__score {
	flex: none;
	padding: 6px 12px; border-radius: 999px;
	border: 1px solid rgba(125, 242, 200, 0.35);
	color: #A5F7DA;
	font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600;
}
.ltn-arc-icon-btn {
	flex: none; display: inline-flex; align-items: center; justify-content: center;
	width: 44px; height: 44px;
	border: 1px solid rgba(242, 246, 243, 0.18); border-radius: 12px;
	background: rgba(242, 246, 243, 0.04); color: #F2F6F3;
	cursor: pointer;
	transition: background 0.15s ease, border-color 0.15s ease;
}
.ltn-arc-icon-btn:hover { background: rgba(242, 246, 243, 0.1); border-color: rgba(242, 246, 243, 0.3); }
.ltn-arc-icon-btn:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 2px; }
.ltn-arc-icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
@media (max-width: 600px) {
	.ltn-arc-stage__title { display: none; }
	/* Ten hops need room: on a phone the route gets its own full-width row. */
	.ltn-arc-stage__top { flex-wrap: wrap; row-gap: 10px; }
	/* (scoped selectors: the base .ltn-arc-route rule comes later in the file) */
	.ltn-arc-stage__top .ltn-arc-route { order: 5; flex: 1 1 100%; }
	.ltn-arc-stage__top .ltn-arc-stage__score { margin-right: auto; }
}

/* One focus ring in the game, not two: the site's global :focus-visible
   box-shadow would stack on top of the stage's own outlines (and drew a box
   inside the terminal prompt). */
.ltn-arc-stage :focus-visible { box-shadow: none; }
.ltn-arc-stage .btn:focus-visible { outline: 2px solid #F2F6F3; outline-offset: 3px; }
.ltn-arc-stage summary:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; border-radius: 4px; }

/* Progress as a route: one hop per question. */
.ltn-arc-route { flex: 1; display: flex; align-items: center; gap: 14px; min-width: 0; }
.ltn-arc-route__label {
	flex: none;
	font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600;
	color: rgba(242, 246, 243, 0.72);
	font-variant-numeric: tabular-nums;
}
.ltn-arc-route__track {
	position: relative; flex: 1;
	display: flex; align-items: center; justify-content: space-between;
	height: 22px; min-width: 0;
}
.ltn-arc-route__line,
.ltn-arc-route__fill {
	position: absolute; left: 8px; top: 50%;
	height: 2px; margin-top: -1px; border-radius: 2px;
}
.ltn-arc-route__line { right: 8px; background: rgba(242, 246, 243, 0.16); }
.ltn-arc-route__fill { width: 0; background: #7DF2C8; transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1); }
.ltn-arc-route__node {
	position: relative; z-index: 1;
	width: 12px; height: 12px; border-radius: 50%;
	border: 2px solid rgba(242, 246, 243, 0.35);
	background: #0B1A16;
	transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.ltn-arc-route__node.is-current {
	transform: scale(1.35);
	border-color: #7DF2C8;
	animation: ltn-arc-ping 1.8s ease-out infinite;
}
.ltn-arc-route__node.is-right { background: #5BD68F; border-color: #5BD68F; }
.ltn-arc-route__node.is-wrong { background: #F98A8A; border-color: #F98A8A; }
.ltn-arc-route__node.is-later { background: #8B7DFF; border-color: #8B7DFF; }
@keyframes ltn-arc-ping {
	0% { box-shadow: 0 0 0 0 rgba(125, 242, 200, 0.5); }
	100% { box-shadow: 0 0 0 9px rgba(125, 242, 200, 0); }
}

.ltn-arc-stage__body {
	position: relative; flex: 1; min-height: 0;
	display: flex;
	overflow-y: auto; overscroll-behavior: contain;
	padding: clamp(16px, 3vw, 40px);
}

/* ---- a question: picture beside the question on wide screens ------------- */

.ltn-arc-q {
	width: min(100%, 1180px);
	margin: auto; /* centred when it fits, top-aligned and scrollable when not */
	display: grid;
	grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
	gap: clamp(18px, 3vw, 40px);
	align-items: center;
	animation: ltn-arc-in 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.ltn-arc-q--nomedia { grid-template-columns: minmax(0, 760px); justify-content: center; }
@media (max-width: 900px) { .ltn-arc-q { grid-template-columns: minmax(0, 1fr); gap: 18px; align-items: start; } }

@keyframes ltn-arc-in {
	from { opacity: 0; transform: translateY(10px); }
	to { opacity: 1; transform: none; }
}

.ltn-arc-q__media {
	position: relative; margin: 0;
	aspect-ratio: 4 / 3;
	max-height: min(72vh, 640px); max-height: min(72dvh, 640px);
	border-radius: 18px; overflow: hidden;
	border: 1px solid rgba(242, 246, 243, 0.1);
	background: #081310;
	box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
/* A blurred copy of the picture fills whatever the real one leaves empty. */
.ltn-arc-q__media::before {
	content: "";
	position: absolute; inset: -24px;
	background: var(--ltn-arc-img) center / cover no-repeat;
	filter: blur(22px) brightness(0.55) saturate(1.15);
}
.ltn-arc-q__media img { position: relative; display: block; width: 100%; height: 100%; object-fit: contain; }
.ltn-arc-q__credit {
	position: absolute; left: 12px; bottom: 12px; z-index: 1;
	max-width: calc(100% - 24px);
	padding: 4px 8px; border-radius: 6px;
	background: rgba(0, 0, 0, 0.5); color: rgba(242, 246, 243, 0.8);
	font-family: var(--font-mono); font-size: 0.72rem;
	white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
@media (max-width: 900px) {
	.ltn-arc-q__media { aspect-ratio: 16 / 10; max-height: 38vh; max-height: 38dvh; width: 100%; }
}

.ltn-arc-q__panel { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.ltn-arc-q__kicker {
	margin: 0;
	font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600;
	letter-spacing: 0.12em; text-transform: uppercase;
	color: #7DF2C8;
}
.ltn-arc-q__text {
	margin: 0;
	font-family: var(--font-head); font-weight: 650;
	font-size: clamp(1.35rem, 2.6vw, 2.05rem); line-height: 1.25; letter-spacing: -0.012em;
	color: #F2F6F3;
}
.ltn-arc-q--nomedia .ltn-arc-q__text { font-size: clamp(1.55rem, 3.4vw, 2.5rem); }

/* Answers: keyed rows. */
.ltn-arc-opts { display: grid; gap: 10px; margin-top: 4px; }
.ltn-arc-q--nomedia .ltn-arc-opts { grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .ltn-arc-q--nomedia .ltn-arc-opts { grid-template-columns: 1fr; } }

.ltn-arc-opt {
	display: flex; align-items: center; gap: 14px;
	width: 100%; min-height: 62px;
	padding: 12px 16px;
	border: 1px solid rgba(242, 246, 243, 0.16); border-radius: 14px;
	background: rgba(242, 246, 243, 0.04);
	color: #F2F6F3; text-align: left;
	font-family: var(--font-body); font-size: 1.08rem; font-weight: 600;
	cursor: pointer;
	transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease, opacity 0.2s ease;
}
.ltn-arc-opt:hover:not(:disabled) { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.07); transform: translateX(3px); }
.ltn-arc-opt:active:not(:disabled) { transform: translateX(1px) scale(0.99); }
.ltn-arc-opt:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-opt:disabled { cursor: default; }
.ltn-arc-opt__key {
	flex: none; display: inline-flex; align-items: center; justify-content: center;
	width: 32px; height: 32px;
	border: 1px solid rgba(242, 246, 243, 0.24); border-bottom-width: 3px; border-radius: 8px;
	background: rgba(0, 0, 0, 0.25);
	font-family: var(--font-mono); font-size: 0.9rem; font-weight: 700;
	color: rgba(242, 246, 243, 0.88);
}
.ltn-arc-opt__label { flex: 1; overflow-wrap: anywhere; }
.ltn-arc-opt__mark { flex: none; width: 24px; height: 24px; }
.ltn-arc-opt__mark svg { display: block; width: 100%; height: 100%; fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

.ltn-arc-opt.is-correct { border-color: #5BD68F; background: rgba(91, 214, 143, 0.14); animation: ltn-arc-pop 0.32s ease-out; }
.ltn-arc-opt.is-correct .ltn-arc-opt__key { background: #5BD68F; border-color: #5BD68F; color: #07231C; }
.ltn-arc-opt.is-correct .ltn-arc-opt__mark svg { stroke: #5BD68F; }
.ltn-arc-opt.is-wrong { border-color: #F98A8A; background: rgba(249, 138, 138, 0.12); animation: ltn-arc-nudge 0.32s ease-out; }
.ltn-arc-opt.is-wrong .ltn-arc-opt__key { background: #F98A8A; border-color: #F98A8A; color: #341A1A; }
.ltn-arc-opt.is-wrong .ltn-arc-opt__mark svg { stroke: #F98A8A; }
.ltn-arc-opt.is-dim { opacity: 0.38; }
@keyframes ltn-arc-pop { 40% { transform: scale(1.02); } }
@keyframes ltn-arc-nudge { 25% { transform: translateX(-4px); } 50% { transform: translateX(4px); } 75% { transform: translateX(-2px); } }

/* Typed answers: a terminal prompt. */
.ltn-arc-term { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.ltn-arc-term__row { display: flex; align-items: stretch; gap: 10px; }
.ltn-arc-term__line {
	flex: 1; min-width: 0;
	display: flex; align-items: center; gap: 10px;
	min-height: 62px; padding: 0 16px;
	border: 1px solid rgba(125, 242, 200, 0.35); border-radius: 14px;
	background: #081310;
	cursor: text;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.ltn-arc-term__line:focus-within { border-color: #7DF2C8; box-shadow: 0 0 0 4px rgba(125, 242, 200, 0.14); }
.ltn-arc-term__prompt { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 700; color: #7DF2C8; }
.ltn-arc-term__input,
.ltn-arc-term__input:focus,
.ltn-arc-term__input:focus-visible {
	flex: 1; min-width: 0;
	padding: 0; border: 0; border-radius: 0; outline: 0; box-shadow: none; background: transparent;
	color: #E8F0EC; caret-color: #7DF2C8;
	font-family: var(--font-mono); font-size: 1.2rem; font-weight: 500;
}
.ltn-arc-term__input::placeholder { color: rgba(232, 240, 236, 0.38); }
.ltn-arc-term__enter {
	flex: none; display: inline-flex; align-items: center; gap: 8px;
	min-height: 62px; padding: 0 20px;
	border: 0; border-radius: 14px;
	background: #7DF2C8; color: #07231C;
	font-family: var(--font-head); font-size: 1rem; font-weight: 700;
	cursor: pointer;
}
.ltn-arc-term__enter:hover:not(:disabled) { background: #A5F7DA; }
.ltn-arc-term__enter:focus-visible { outline: 2px solid #F2F6F3; outline-offset: 3px; }
.ltn-arc-term__enter:disabled { opacity: 0.4; cursor: not-allowed; }
.ltn-arc-term__hint { margin: 0; font-size: 0.85rem; color: rgba(242, 246, 243, 0.55); }
.ltn-arc-term.is-right .ltn-arc-term__line { border-color: #5BD68F; box-shadow: 0 0 0 4px rgba(91, 214, 143, 0.14); }
.ltn-arc-term.is-wrong .ltn-arc-term__line { border-color: #F98A8A; box-shadow: 0 0 0 4px rgba(249, 138, 138, 0.12); }
@media (max-width: 420px) { .ltn-arc-term__enter > span:first-child { display: none; } }

/* After an answer: the feedback strip, with a draining timer to the next one. */
.ltn-arc-fb {
	position: relative;
	display: none;
	grid-template-columns: auto minmax(0, 1fr) auto;
	align-items: center; gap: 12px 14px;
	padding: 14px 16px 17px;
	border: 1px solid rgba(242, 246, 243, 0.12); border-radius: 14px;
	background: rgba(242, 246, 243, 0.05);
	overflow: hidden;
}
.ltn-arc-fb.is-on { display: grid; animation: ltn-arc-in 0.22s ease-out; }
.ltn-arc-fb.is-right { border-color: rgba(91, 214, 143, 0.5); background: rgba(91, 214, 143, 0.1); }
.ltn-arc-fb.is-wrong { border-color: rgba(249, 138, 138, 0.5); background: rgba(249, 138, 138, 0.08); }
.ltn-arc-fb__icon svg {
	display: block; width: 32px; height: 32px; padding: 6px; border-radius: 50%;
	fill: none; stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round;
}
.ltn-arc-fb.is-right .ltn-arc-fb__icon svg { background: #5BD68F; stroke: #07231C; }
.ltn-arc-fb.is-wrong .ltn-arc-fb__icon svg { background: #F98A8A; stroke: #341A1A; }
.ltn-arc-fb__words strong { display: block; font-family: var(--font-head); font-size: 1.05rem; color: #F2F6F3; }
.ltn-arc-fb__words span { display: block; margin-top: 1px; font-size: 0.95rem; color: rgba(242, 246, 243, 0.82); overflow-wrap: anywhere; }
.ltn-arc-fb__actions { display: flex; gap: 8px; }
.ltn-arc-fb__why,
.ltn-arc-fb__next {
	display: inline-flex; align-items: center; gap: 6px;
	min-height: 44px; padding: 0 16px; border-radius: 999px;
	font-family: var(--font-head); font-size: 0.95rem; font-weight: 600;
	cursor: pointer;
}
.ltn-arc-fb__why { border: 1px solid rgba(242, 246, 243, 0.35); background: transparent; color: #F2F6F3; }
.ltn-arc-fb__why:hover { background: rgba(242, 246, 243, 0.08); }
.ltn-arc-fb__next { border: 0; background: #7DF2C8; color: #07231C; }
.ltn-arc-fb__next:hover { background: #A5F7DA; }
.ltn-arc-fb__why:focus-visible, .ltn-arc-fb__next:focus-visible { outline: 2px solid #F2F6F3; outline-offset: 2px; }
.ltn-arc-fb__explain {
	grid-column: 1 / -1; margin: 0; padding-top: 12px;
	border-top: 1px solid rgba(242, 246, 243, 0.12);
	color: rgba(242, 246, 243, 0.9); line-height: 1.6;
}
.ltn-arc-fb__timer {
	position: absolute; left: 0; bottom: 0;
	width: 100%; height: 3px;
	background: #7DF2C8;
	transform-origin: left center;
	animation: ltn-arc-drain 1s linear forwards;
}
.ltn-arc-fb.is-wrong .ltn-arc-fb__timer { background: #F98A8A; }
.ltn-arc-fb.is-held .ltn-arc-fb__timer { display: none; }
@keyframes ltn-arc-drain { from { transform: scaleX(1); } to { transform: scaleX(0); } }
@media (max-width: 560px) {
	.ltn-arc-fb { grid-template-columns: auto minmax(0, 1fr); }
	.ltn-arc-fb__actions { grid-column: 1 / -1; justify-content: flex-end; }
}

/* ---- end of a round: the route trace -------------------------------------- */

.ltn-arc-res {
	width: min(100%, 780px);
	margin: auto;
	padding: clamp(22px, 4vw, 44px);
	border: 1px solid rgba(242, 246, 243, 0.12); border-radius: 22px;
	background: rgba(23, 49, 43, 0.78);
	-webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
	box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
	animation: ltn-arc-in 0.3s ease-out;
}
.ltn-arc-res__kicker {
	margin: 0 0 14px;
	font-family: var(--font-mono); font-size: 0.78rem; font-weight: 600;
	letter-spacing: 0.12em; text-transform: uppercase; color: #7DF2C8;
}
.ltn-arc-res__head { display: flex; align-items: center; gap: clamp(16px, 4vw, 32px); flex-wrap: wrap; }
.ltn-arc-res__score { margin: 0; display: flex; align-items: baseline; font-variant-numeric: tabular-nums; }
.ltn-arc-res__score strong { font-family: var(--font-head); font-size: clamp(3.2rem, 9vw, 4.8rem); font-weight: 800; line-height: 1; color: #F2F6F3; }
.ltn-arc-res__score span { margin-left: 4px; font-family: var(--font-mono); font-size: clamp(1.2rem, 3vw, 1.6rem); color: rgba(242, 246, 243, 0.55); }
.ltn-arc-res__title { margin: 0; font-family: var(--font-head); font-size: clamp(1.4rem, 3.4vw, 2rem); color: #F2F6F3; }
.ltn-arc-res__sub { margin: 4px 0 0; color: rgba(242, 246, 243, 0.75); }

.ltn-arc-trace {
	position: relative;
	display: flex; align-items: center; justify-content: space-between;
	margin: 26px 0 6px; height: 30px;
}
.ltn-arc-trace::before {
	content: ""; position: absolute; left: 13px; right: 13px; top: 50%;
	height: 2px; margin-top: -1px; background: rgba(242, 246, 243, 0.18);
}
.ltn-arc-trace__node {
	position: relative; z-index: 1;
	display: flex; align-items: center; justify-content: center;
	width: 26px; height: 26px; border-radius: 50%;
	opacity: 0; transform: scale(0.4);
	animation: ltn-arc-light 0.32s cubic-bezier(0.2, 1.4, 0.4, 1) forwards;
}
.ltn-arc-trace__node.is-right { background: #5BD68F; }
.ltn-arc-trace__node.is-wrong { background: #F98A8A; }
.ltn-arc-trace__node.is-later { background: #8B7DFF; }
.ltn-arc-trace__node svg { width: 14px; height: 14px; fill: none; stroke: #07231C; stroke-width: 3.4; stroke-linecap: round; stroke-linejoin: round; }
.ltn-arc-trace__node.is-wrong svg { stroke: #341A1A; }
.ltn-arc-trace__node.is-later svg { stroke: #1A1640; }
@keyframes ltn-arc-light { to { opacity: 1; transform: none; } }

.ltn-arc-res__ask { margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(242, 246, 243, 0.12); }
.ltn-arc-res__q { margin: 0 0 14px; color: #F2F6F3; font-size: 1.1rem; font-weight: 600; }
.ltn-arc-res__btns { display: flex; flex-wrap: wrap; gap: 10px; }
.ltn-arc-stage .btn { gap: 8px; }
.ltn-arc-stage .btn--ghost { color: #F2F6F3; border-color: rgba(242, 246, 243, 0.4); background: transparent; }
.ltn-arc-stage .btn--ghost:hover { background: rgba(242, 246, 243, 0.08); color: #F2F6F3; }

.ltn-arc-rev { margin-top: 24px; }
.ltn-arc-rev summary { cursor: pointer; color: #A5F7DA; font-weight: 600; padding: 6px 0; }
.ltn-arc-rev__item {
	display: grid; grid-template-columns: 30px 1fr; gap: 12px;
	padding: 14px 0;
	border-top: 1px solid rgba(242, 246, 243, 0.1);
}
.ltn-arc-rev__mark svg {
	display: block; width: 26px; height: 26px; padding: 5px; border-radius: 50%;
	fill: none; stroke-width: 3.2; stroke-linecap: round; stroke-linejoin: round;
}
.ltn-arc-rev__item.is-right .ltn-arc-rev__mark svg { background: #5BD68F; stroke: #07231C; }
.ltn-arc-rev__item.is-wrong .ltn-arc-rev__mark svg { background: #F98A8A; stroke: #341A1A; }
.ltn-arc-rev__thumb {
	float: right; width: 96px; height: 72px; margin: 0 0 6px 12px;
	object-fit: contain; border-radius: 8px; background: #081310;
}
.ltn-arc-rev__q { margin: 0; color: #F2F6F3; font-weight: 600; }
.ltn-arc-rev__a { margin: 4px 0 0; color: rgba(242, 246, 243, 0.85); font-size: 0.95rem; }
.ltn-arc-rev__why { margin: 6px 0 0; color: rgba(242, 246, 243, 0.75); font-size: 0.92rem; line-height: 1.55; }
.ltn-arc-rev__credit { margin: 4px 0 0; color: rgba(242, 246, 243, 0.5); font-size: 0.75rem; font-family: var(--font-mono); }

@media (prefers-reduced-motion: reduce) {
	.ltn-arc-q, .ltn-arc-fb.is-on, .ltn-arc-res,
	.ltn-arc-opt.is-correct, .ltn-arc-opt.is-wrong,
	.ltn-arc-route__node.is-current { animation: none; }
	.ltn-arc-trace__node { animation: none; opacity: 1; transform: none; }
	.ltn-arc-opt, .ltn-arc-route__fill, .ltn-arc-route__node { transition: none; }
	.ltn-arc-opt:hover:not(:disabled) { transform: none; }
	/* The drain bar stays: it tells you when the next question comes. */
}

/* ---- the game types added in 0.5 ------------------------------------------ */

/* Shared pieces: keycaps, small headings, buttons, marks. */
.ltn-arc-ic { display: inline-flex; }
.ltn-arc-ic svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.ltn-arc-key {
	flex: none; display: inline-flex; align-items: center; justify-content: center;
	min-width: 28px; height: 28px; padding: 0 6px;
	border: 1px solid rgba(242, 246, 243, 0.24); border-bottom-width: 3px; border-radius: 8px;
	background: rgba(0, 0, 0, 0.25);
	font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; color: rgba(242, 246, 243, 0.88);
}
.ltn-arc-hint { margin: 0; font-size: 0.9rem; line-height: 1.45; color: rgba(242, 246, 243, 0.66); }
.ltn-arc-note { margin: 0; padding: 12px 14px; border: 1px dashed rgba(242, 246, 243, 0.22); border-radius: 12px; color: rgba(242, 246, 243, 0.68); font-size: 0.9rem; }
.ltn-arc-col-h {
	margin: 0; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
	letter-spacing: 0.12em; text-transform: uppercase; color: rgba(242, 246, 243, 0.66);
}
.ltn-arc-col { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.ltn-arc-col__head { display: flex; align-items: baseline; justify-content: space-between; gap: 6px 12px; flex-wrap: wrap; }
.ltn-arc-stack { display: flex; flex-direction: column; gap: 10px; }

.ltn-arc-acts { display: flex; align-items: center; gap: 10px 12px; flex-wrap: wrap; }
.ltn-arc-acts[hidden] { display: none; }
.ltn-arc-go, .ltn-arc-ghost, .ltn-arc-later {
	display: inline-flex; align-items: center; justify-content: center; gap: 8px;
	min-height: 48px; padding: 0 20px; border-radius: 999px;
	font-family: var(--font-head); font-size: 1rem; font-weight: 700; cursor: pointer;
	transition: background 0.15s ease, opacity 0.15s ease;
}
.ltn-arc-go[hidden], .ltn-arc-later[hidden] { display: none; }
.ltn-arc-go { border: 0; background: #7DF2C8; color: #07231C; }
.ltn-arc-go:hover:not(:disabled) { background: #A5F7DA; }
.ltn-arc-ghost { border: 1px solid rgba(242, 246, 243, 0.35); background: transparent; color: #F2F6F3; font-weight: 600; }
.ltn-arc-ghost:hover:not(:disabled) { background: rgba(242, 246, 243, 0.08); }
.ltn-arc-later { border: 1px solid rgba(139, 125, 255, 0.8); background: rgba(139, 125, 255, 0.12); color: #E2DEFF; }
.ltn-arc-later:hover { background: rgba(139, 125, 255, 0.22); }
.ltn-arc-go:disabled, .ltn-arc-ghost:disabled { opacity: 0.4; cursor: not-allowed; }
.ltn-arc-go:focus-visible, .ltn-arc-ghost:focus-visible, .ltn-arc-later:focus-visible { outline: 2px solid #F2F6F3; outline-offset: 3px; }
.ltn-arc-go .ltn-arc-btn-icon svg { width: 18px; height: 18px; }
.ltn-arc-go .ltn-arc-key { background: rgba(7, 35, 28, 0.15); border-color: rgba(7, 35, 28, 0.35); color: #07231C; }
.ltn-arc-later .ltn-arc-key { border-color: rgba(201, 194, 255, 0.5); color: #E2DEFF; }

.ltn-arc-mark { flex: none; display: inline-flex; width: 22px; height: 22px; }
.ltn-arc-mark svg { display: block; width: 100%; height: 100%; fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.ltn-arc-mark.is-right svg { stroke: #5BD68F; }
.ltn-arc-mark.is-wrong svg { stroke: #F98A8A; }
.ltn-arc-fix {
	flex: none; padding: 3px 8px; border-radius: 6px;
	background: rgba(249, 138, 138, 0.16); color: #FFC2C2;
	font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; white-space: nowrap;
}

/* A wide single column (order, sort, match). */
.ltn-arc-q--wide { grid-template-columns: minmax(0, 1fr); width: min(100%, 1080px); }
.ltn-arc-q--wide .ltn-arc-q__panel { gap: 18px; }
.ltn-arc-q--wide .ltn-arc-q__text { font-size: clamp(1.3rem, 2.4vw, 1.9rem); max-width: 900px; }

/* Tiles: the pieces you move. */
.ltn-arc-tile {
	display: flex; align-items: center; gap: 12px;
	width: 100%; min-height: 54px; padding: 10px 14px;
	border: 1px solid rgba(242, 246, 243, 0.16); border-radius: 12px;
	background: rgba(242, 246, 243, 0.04); color: #F2F6F3; text-align: left;
	font-family: var(--font-body); font-size: 1rem; font-weight: 600; line-height: 1.35;
	cursor: pointer;
	transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.ltn-arc-tile:hover:not(:disabled) { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.07); }
.ltn-arc-tile:active:not(:disabled) { transform: scale(0.99); }
.ltn-arc-tile:disabled { cursor: default; }
.ltn-arc-tile:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-tile__t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.ltn-arc-tile.is-right { border-color: #5BD68F; background: rgba(91, 214, 143, 0.14); }
.ltn-arc-tile.is-wrong { border-color: #F98A8A; background: rgba(249, 138, 138, 0.12); }

/* Put in order: the pool beside a numbered path. */
.ltn-arc-ord { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; }
.ltn-arc-path { position: relative; list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.ltn-arc-path::before { content: ""; position: absolute; left: 17px; top: 27px; bottom: 27px; width: 2px; background: rgba(242, 246, 243, 0.14); }
.ltn-arc-hop { position: relative; display: flex; align-items: center; gap: 14px; min-height: 54px; margin: 0; }
.ltn-arc-hop__num {
	position: relative; z-index: 1; flex: none;
	display: inline-flex; align-items: center; justify-content: center;
	width: 36px; height: 36px; border-radius: 50%;
	border: 2px solid rgba(242, 246, 243, 0.28); background: #0B1A16;
	font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; color: rgba(242, 246, 243, 0.72);
}
.ltn-arc-hop.is-next .ltn-arc-hop__num { border-color: #7DF2C8; color: #7DF2C8; animation: ltn-arc-ping 1.8s ease-out infinite; }
.ltn-arc-hop.is-filled .ltn-arc-hop__num { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.14); color: #A5F7DA; }
.ltn-arc-hop.is-right .ltn-arc-hop__num { border-color: #5BD68F; background: #5BD68F; color: #07231C; }
.ltn-arc-hop.is-wrong .ltn-arc-hop__num { border-color: #F98A8A; background: #F98A8A; color: #341A1A; }
.ltn-arc-hop__card { animation: ltn-arc-drop 0.22s ease-out; }
.ltn-arc-hop__slot {
	flex: 1; display: flex; align-items: center; min-height: 54px; padding: 0 14px;
	border: 1px dashed rgba(242, 246, 243, 0.2); border-radius: 12px;
	color: rgba(242, 246, 243, 0.5); font-size: 0.9rem;
}
.ltn-arc-hop.is-next .ltn-arc-hop__slot { border-color: rgba(125, 242, 200, 0.55); color: #A5F7DA; }
.ltn-arc-answer { margin: 0; padding: 0; list-style: none; counter-reset: ltn-arc-a; display: flex; flex-direction: column; gap: 8px; animation: ltn-arc-in 0.25s ease-out; }
.ltn-arc-answer li {
	counter-increment: ltn-arc-a; display: flex; align-items: flex-start; gap: 12px; margin: 0;
	padding: 10px 12px; border: 1px solid rgba(91, 214, 143, 0.35); border-radius: 12px;
	background: rgba(91, 214, 143, 0.08); color: #F2F6F3; font-size: 0.95rem; line-height: 1.35;
}
.ltn-arc-answer li::before {
	content: counter(ltn-arc-a); flex: none; display: inline-flex; align-items: center; justify-content: center;
	width: 26px; height: 26px; border-radius: 50%; background: #5BD68F; color: #07231C;
	font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700;
}
@keyframes ltn-arc-drop { from { opacity: 0; transform: translateY(-6px) scale(0.98); } to { opacity: 1; transform: none; } }

/* Sort into groups: a tray of chips over the groups. */
.ltn-arc-tray { display: flex; flex-direction: column; gap: 10px; }
.ltn-arc-chips { display: flex; flex-wrap: wrap; gap: 10px; min-height: 48px; align-items: center; }
.ltn-arc-chip {
	display: inline-flex; align-items: center; gap: 10px;
	min-height: 46px; padding: 6px 14px 6px 8px;
	border: 1px solid rgba(242, 246, 243, 0.16); border-radius: 12px;
	background: rgba(242, 246, 243, 0.04); color: #F2F6F3;
	font-family: var(--font-body); font-size: 0.97rem; font-weight: 600; text-align: left;
	cursor: grab; touch-action: manipulation;
	transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.ltn-arc-chip:hover:not(:disabled) { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.07); }
.ltn-arc-chip:disabled { cursor: default; }
.ltn-arc-chip:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-chip .ltn-arc-key { min-width: 26px; height: 26px; font-size: 0.72rem; }
.ltn-arc-chip.is-sel { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.14); box-shadow: 0 0 0 3px rgba(125, 242, 200, 0.2); }
.ltn-arc-chip.is-sel .ltn-arc-key { background: #7DF2C8; border-color: #7DF2C8; color: #07231C; }
.ltn-arc-chip__t { overflow-wrap: anywhere; }
.ltn-arc-chip--in { width: 100%; justify-content: space-between; padding: 6px 12px; cursor: pointer; animation: ltn-arc-drop 0.22s ease-out; }
.ltn-arc-chip--in .ltn-arc-chip__t { flex: 1; }
.ltn-arc-chip.is-right { border-color: #5BD68F; background: rgba(91, 214, 143, 0.14); }
.ltn-arc-chip.is-wrong { border-color: #F98A8A; background: rgba(249, 138, 138, 0.12); }

.ltn-arc-bins { display: grid; gap: 14px; }
.ltn-arc-bins--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ltn-arc-bins--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ltn-arc-bins--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.ltn-arc-bin {
	display: flex; flex-direction: column; gap: 10px;
	min-height: 200px; padding: 14px;
	border: 1px solid rgba(242, 246, 243, 0.12); border-radius: 16px;
	background: rgba(8, 19, 16, 0.72);
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.ltn-arc-bin.is-target { border-color: rgba(125, 242, 200, 0.55); }
.ltn-arc-bin.is-over { border-color: #7DF2C8; box-shadow: inset 0 0 0 1px #7DF2C8; }
.ltn-arc-bin__head { display: flex; align-items: center; gap: 12px; padding-bottom: 10px; border-bottom: 1px solid rgba(242, 246, 243, 0.1); }
.ltn-arc-bin__name { flex: 1; min-width: 0; }
.ltn-arc-bin__name strong { display: block; font-family: var(--font-head); font-size: 1.1rem; font-weight: 700; color: #F2F6F3; }
.ltn-arc-bin__name span { display: block; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(242, 246, 243, 0.6); }
.ltn-arc-bin__count { font-family: var(--font-mono); font-size: 0.8rem; color: rgba(242, 246, 243, 0.6); }
.ltn-arc-bin__items { display: flex; flex-direction: column; gap: 8px; }
.ltn-arc-bin__drop {
	display: flex; align-items: center; justify-content: center; gap: 8px;
	min-height: 48px; margin-top: auto; padding: 0 12px;
	border: 1px dashed rgba(125, 242, 200, 0.6); border-radius: 12px;
	background: rgba(125, 242, 200, 0.06); color: #A5F7DA;
	font-family: var(--font-body); font-size: 0.9rem; font-weight: 600; cursor: pointer;
}
.ltn-arc-bin__drop:hover { background: rgba(125, 242, 200, 0.12); border-style: solid; }
.ltn-arc-bin__drop:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-bin__drop svg { flex: none; width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.ltn-arc-bin__empty { margin: auto 0 0; padding: 12px 0 4px; text-align: center; color: rgba(242, 246, 243, 0.45); font-size: 0.85rem; }

/* Estimate: a readout over a scale. */
.ltn-arc-dial {
	display: flex; flex-direction: column; gap: 20px; margin-top: 4px;
	padding: clamp(16px, 3vw, 26px);
	border: 1px solid rgba(242, 246, 243, 0.12); border-radius: 18px;
	background: rgba(8, 19, 16, 0.72);
}
.ltn-arc-dial__read { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; min-height: 90px; }
.ltn-arc-dial__you, .ltn-arc-dial__ans { display: flex; flex-direction: column; gap: 4px; }
.ltn-arc-dial__ans { align-items: flex-end; animation: ltn-arc-in 0.25s ease-out; }
.ltn-arc-dial__lbl { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(242, 246, 243, 0.6); }
.ltn-arc-dial__ans .ltn-arc-dial__lbl { color: #5BD68F; }
.ltn-arc-dial__num { display: flex; align-items: baseline; gap: 10px; font-variant-numeric: tabular-nums; }
.ltn-arc-dial__num strong { font-family: var(--font-mono); font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1; font-weight: 700; letter-spacing: -0.03em; color: #F2F6F3; }
.ltn-arc-dial__num span { font-family: var(--font-head); font-size: 1.2rem; font-weight: 600; color: rgba(242, 246, 243, 0.7); }
.ltn-arc-dial__ans strong { font-family: var(--font-mono); font-size: clamp(1.6rem, 4vw, 2.4rem); line-height: 1; font-weight: 700; color: #5BD68F; }
.ltn-arc-gap { padding: 3px 9px; border-radius: 8px; font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; }
.ltn-arc-gap.is-right { background: rgba(91, 214, 143, 0.16); color: #9BEBBE; }
.ltn-arc-gap.is-wrong { background: rgba(249, 138, 138, 0.16); color: #FFC2C2; }
.ltn-arc-scale { position: relative; height: 56px; margin-top: 26px; }
.ltn-arc-scale__rail { position: absolute; left: 14px; right: 14px; top: 26px; height: 4px; border-radius: 4px; background: rgba(242, 246, 243, 0.14); }
.ltn-arc-scale__fill { position: absolute; left: 14px; top: 26px; height: 4px; border-radius: 4px; background: #7DF2C8; }
.ltn-arc-scale__band { position: absolute; top: 14px; height: 28px; border-radius: 8px; background: rgba(91, 214, 143, 0.18); border: 1px dashed rgba(91, 214, 143, 0.6); }
.ltn-arc-scale__miss { position: absolute; top: 26px; height: 4px; background: repeating-linear-gradient(90deg, #F98A8A 0 6px, transparent 6px 10px); }
.ltn-arc-scale__miss.is-right { background: repeating-linear-gradient(90deg, #5BD68F 0 6px, transparent 6px 10px); }
.ltn-arc-scale__flag { position: absolute; top: -32px; bottom: 4px; width: 0; animation: ltn-arc-in 0.25s ease-out; pointer-events: none; }
.ltn-arc-scale__flag::before { content: ""; position: absolute; left: -1px; top: 24px; bottom: 0; width: 2px; background: #5BD68F; }
.ltn-arc-scale__flag span { position: absolute; left: 50%; top: 0; transform: translateX(-50%); padding: 2px 8px; border-radius: 6px; background: #5BD68F; color: #07231C; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700; white-space: nowrap; }
.ltn-arc-scale__input {
	-webkit-appearance: none; appearance: none;
	position: absolute; left: 0; top: 0; width: 100%; height: 56px; margin: 0;
	background: transparent; cursor: pointer; touch-action: pan-y;
}
.ltn-arc-scale__input:disabled { cursor: default; }
.ltn-arc-scale__input::-webkit-slider-runnable-track { height: 56px; background: transparent; }
.ltn-arc-scale__input::-webkit-slider-thumb {
	-webkit-appearance: none; appearance: none;
	width: 28px; height: 28px; margin-top: 14px; border-radius: 50%;
	background: #7DF2C8; border: 4px solid #0B1A16; box-shadow: 0 0 0 2px #7DF2C8, 0 6px 18px rgba(0, 0, 0, 0.45);
}
.ltn-arc-scale__input::-moz-range-track { height: 56px; background: transparent; }
.ltn-arc-scale__input::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: #7DF2C8; border: 4px solid #0B1A16; box-shadow: 0 0 0 2px #7DF2C8; }
.ltn-arc-scale__input:focus-visible { outline: none; }
.ltn-arc-scale__input:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 2px #7DF2C8, 0 0 0 8px rgba(125, 242, 200, 0.3); }
.ltn-arc-scale__input:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 2px #7DF2C8, 0 0 0 8px rgba(125, 242, 200, 0.3); }
.ltn-arc-scale__ticks { position: relative; height: 18px; }
.ltn-arc-scale__tick { position: absolute; top: 0; transform: translateX(-50%); font-family: var(--font-mono); font-size: 0.75rem; color: rgba(242, 246, 243, 0.55); white-space: nowrap; }
.ltn-arc-tune { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ltn-arc-tune__gap { flex: 1; }
.ltn-arc-nudge {
	display: inline-flex; align-items: center; justify-content: center;
	min-width: 60px; min-height: 44px; padding: 0 12px;
	border: 1px solid rgba(242, 246, 243, 0.2); border-radius: 12px;
	background: rgba(242, 246, 243, 0.04); color: #F2F6F3;
	font-family: var(--font-mono); font-size: 0.88rem; font-weight: 700; cursor: pointer;
}
.ltn-arc-nudge:hover:not(:disabled) { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.07); }
.ltn-arc-nudge:disabled { opacity: 0.35; cursor: default; }
.ltn-arc-nudge:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 2px; }
.ltn-arc-q--estimate.ltn-arc-q--nomedia { grid-template-columns: minmax(0, 860px); }

/* Pictures you act on (find it, label it): the picture keeps its own shape,
   so a point on screen is the same point the editor marked. */
.ltn-arc-q--hotspot, .ltn-arc-q--label { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }
.ltn-arc-hot, .ltn-arc-lab { position: relative; margin: 0; display: flex; flex-direction: column; align-items: center; gap: 10px; min-width: 0; }
.ltn-arc-hot__pic, .ltn-arc-pic {
	position: relative; display: inline-block; max-width: 100%; padding: 0;
	border: 1px solid rgba(242, 246, 243, 0.12); border-radius: 16px; overflow: hidden;
	background: #081310; line-height: 0;
	box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
.ltn-arc-hot__pic { cursor: crosshair; }
.ltn-arc-hot__pic.is-done { cursor: default; }
.ltn-arc-hot__pic img, .ltn-arc-pic img {
	display: block; max-width: 100%; width: auto; height: auto;
	max-height: min(68vh, 640px); max-height: min(68dvh, 640px);
	user-select: none; -webkit-user-select: none;
}
.ltn-arc-hot__pic:focus-visible { outline: 3px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-hot__cross {
	position: absolute; display: none; width: 26px; height: 26px; transform: translate(-50%, -50%);
	border: 2px solid #7DF2C8; border-radius: 50%; box-shadow: 0 0 0 2px rgba(11, 26, 22, 0.8);
	pointer-events: none;
}
.ltn-arc-hot__pic:focus-visible:not(.is-done) .ltn-arc-hot__cross { display: block; }
.ltn-arc-hot__ring {
	position: absolute; aspect-ratio: 1; transform: translate(-50%, -50%);
	border: 3px solid #5BD68F; border-radius: 50%;
	background: rgba(91, 214, 143, 0.18); box-shadow: 0 0 0 3px rgba(11, 26, 22, 0.6);
	pointer-events: none;
}
.ltn-arc-hot__ring.is-box { aspect-ratio: auto; transform: none; border-radius: 10px; }
.ltn-arc-hot__tap {
	position: absolute; width: 18px; height: 18px; transform: translate(-50%, -50%);
	border-radius: 50%; border: 3px solid #0B1A16; pointer-events: none;
}
.ltn-arc-hot__tap.is-right { background: #5BD68F; }
.ltn-arc-hot__tap.is-wrong { background: #F98A8A; }
.ltn-arc-hot .ltn-arc-q__credit, .ltn-arc-lab .ltn-arc-q__credit { position: static; max-width: 100%; }
.ltn-arc-tap { margin: 0; padding: 12px 14px; border: 1px dashed rgba(242, 246, 243, 0.22); border-radius: 12px; color: rgba(242, 246, 243, 0.72); font-size: 0.95rem; }
.ltn-arc-tap[hidden] { display: none; }

/* Label the picture: numbered points, numbered boxes. */
.ltn-arc-pin {
	position: absolute; transform: translate(-50%, -50%);
	display: inline-flex; align-items: center; justify-content: center;
	width: 30px; height: 30px; border-radius: 50%;
	background: #7DF2C8; color: #07231C; border: 3px solid #0B1A16;
	font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; line-height: 1;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
	transition: transform 0.15s ease, background 0.15s ease;
}
.ltn-arc-pin.is-hi { transform: translate(-50%, -50%) scale(1.25); background: #F2F6F3; }
.ltn-arc-pin.is-right { background: #5BD68F; }
.ltn-arc-pin.is-wrong { background: #F98A8A; color: #341A1A; }
.ltn-arc-chips--labels { min-height: 0; }
.ltn-arc-boxes { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.ltn-arc-boxes li { margin: 0; }
.ltn-arc-box {
	display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
	width: 100%; min-height: 48px; padding: 6px 12px 6px 6px;
	border: 1px dashed rgba(242, 246, 243, 0.25); border-radius: 12px;
	background: transparent; color: rgba(242, 246, 243, 0.55);
	font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; text-align: left; cursor: pointer;
}
.ltn-arc-box:hover:not(:disabled) { border-color: #7DF2C8; background: rgba(125, 242, 200, 0.06); }
.ltn-arc-box:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-box:disabled { cursor: default; }
.ltn-arc-box__no {
	flex: none; display: inline-flex; align-items: center; justify-content: center;
	width: 34px; height: 34px; border-radius: 50%;
	background: #7DF2C8; color: #07231C; font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700;
}
.ltn-arc-box__t { flex: 1; min-width: 0; }
.ltn-arc-box.is-target { border-color: rgba(125, 242, 200, 0.7); color: #A5F7DA; }
.ltn-arc-box.is-filled { border-style: solid; border-color: rgba(125, 242, 200, 0.45); background: rgba(125, 242, 200, 0.08); color: #F2F6F3; animation: ltn-arc-drop 0.22s ease-out; }
.ltn-arc-box.is-right { border-style: solid; border-color: #5BD68F; background: rgba(91, 214, 143, 0.14); color: #F2F6F3; }
.ltn-arc-box.is-right .ltn-arc-box__no { background: #5BD68F; }
.ltn-arc-box.is-wrong { border-style: solid; border-color: #F98A8A; background: rgba(249, 138, 138, 0.12); color: #F2F6F3; }
.ltn-arc-box.is-wrong .ltn-arc-box__no { background: #F98A8A; color: #341A1A; }

/* Match pairs: two columns, cables between. */
.ltn-arc-clock {
	align-self: flex-start; display: inline-flex; align-items: center; gap: 12px;
	padding: 8px 14px; border: 1px solid rgba(242, 246, 243, 0.14); border-radius: 14px;
	background: rgba(8, 19, 16, 0.72); color: #7DF2C8;
}
.ltn-arc-clock__time { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; color: #F2F6F3; min-width: 6.2ch; }
.ltn-arc-clock__slips { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; color: rgba(242, 246, 243, 0.64); white-space: nowrap; }
.ltn-arc-clock__slips.has-slips { color: #FFC2C2; }
.ltn-arc-match { position: relative; display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); column-gap: clamp(40px, 16%, 200px); }
.ltn-arc-match__wires { position: absolute; inset: 0; pointer-events: none; }
.ltn-arc-match__col { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.ltn-arc-match__progress[hidden] { display: none; }
.ltn-arc-jack {
	position: relative; display: flex; align-items: center; gap: 12px;
	width: 100%; min-height: 56px; padding: 8px 16px 8px 10px;
	border: 1px solid rgba(242, 246, 243, 0.16); border-radius: 14px;
	background: rgba(17, 36, 31, 0.95); color: #F2F6F3; text-align: left;
	font-family: var(--font-body); font-size: 0.97rem; font-weight: 600; line-height: 1.3;
	cursor: pointer; transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.ltn-arc-match__col--r .ltn-arc-jack { padding: 8px 10px 8px 16px; }
.ltn-arc-jack:hover:not(:disabled) { border-color: #7DF2C8; }
.ltn-arc-jack:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 3px; }
.ltn-arc-jack:disabled { cursor: default; }
.ltn-arc-jack__t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.ltn-arc-match__col--l .ltn-arc-jack__t { font-family: var(--font-mono); font-size: 1.05rem; }
.ltn-arc-jack__sock {
	position: absolute; top: 50%; width: 14px; height: 14px; margin-top: -7px;
	border-radius: 50%; border: 2px solid rgba(242, 246, 243, 0.35); background: #0B1A16;
}
.ltn-arc-match__col--l .ltn-arc-jack__sock { right: -8px; }
.ltn-arc-match__col--r .ltn-arc-jack__sock { left: -8px; }
.ltn-arc-jack.is-sel { border-color: #7DF2C8; background: rgba(28, 74, 60, 0.95); box-shadow: 0 0 0 3px rgba(125, 242, 200, 0.2); }
.ltn-arc-jack.is-sel .ltn-arc-key { background: #7DF2C8; border-color: #7DF2C8; color: #07231C; }
.ltn-arc-jack.is-sel .ltn-arc-jack__sock, .ltn-arc-jack.is-linked .ltn-arc-jack__sock { border-color: #7DF2C8; background: #7DF2C8; }
.ltn-arc-jack.is-linked { border-color: rgba(125, 242, 200, 0.45); }
.ltn-arc-jack.is-linked .ltn-arc-key { opacity: 0.45; }
.ltn-arc-jack.is-wrong { border-color: #F98A8A; background: rgba(70, 30, 30, 0.95); animation: ltn-arc-nudge 0.32s ease-out; }
.ltn-arc-jack.is-wrong .ltn-arc-jack__sock { border-color: #F98A8A; background: #F98A8A; }
.ltn-arc-cable {
	position: absolute; height: 3px; border-radius: 3px; transform-origin: 0 50%;
	background: #7DF2C8; box-shadow: 0 0 12px rgba(125, 242, 200, 0.35);
	animation: ltn-arc-fade 0.3s ease-out;
}
@keyframes ltn-arc-fade { from { opacity: 0; } to { opacity: 1; } }

/* Flashcards. */
.ltn-arc-q--card { grid-template-columns: minmax(0, 1fr); width: min(100%, 900px); }
.ltn-arc-q--card .ltn-arc-q__panel { align-items: center; text-align: center; gap: 16px; }
.ltn-arc-cardnote { margin: 0; min-height: 1.4em; color: #C9C2FF; font-size: 0.95rem; }
.ltn-arc-deck { display: flex; align-items: center; justify-content: center; gap: 24px; width: 100%; }
.ltn-arc-flip { width: min(100%, 680px); height: clamp(250px, 42vh, 340px); height: clamp(250px, 42dvh, 340px); perspective: 1600px; }
.ltn-arc-flip__inner { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1); }
.ltn-arc-flip.is-flipped .ltn-arc-flip__inner { transform: rotateY(180deg); }
.ltn-arc-face {
	position: absolute; inset: 0; display: flex; flex-direction: column; gap: 10px;
	padding: clamp(18px, 3vw, 28px) clamp(18px, 3.5vw, 34px);
	border: 1px solid rgba(242, 246, 243, 0.14); border-radius: 22px;
	background: rgba(23, 49, 43, 0.95); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
	text-align: left; overflow: hidden;
	-webkit-backface-visibility: hidden; backface-visibility: hidden;
}
.ltn-arc-face--back { transform: rotateY(180deg); background: #0F2722; }
.ltn-arc-face__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.ltn-arc-face__lbl { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(242, 246, 243, 0.6); }
.ltn-arc-again { padding: 3px 9px; border-radius: 6px; background: rgba(139, 125, 255, 0.22); color: #C9C2FF; font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.ltn-arc-face__img { display: block; max-width: 100%; max-height: 40%; margin: 0 auto; object-fit: contain; border-radius: 10px; }
.ltn-arc-face__term { margin: auto 0; text-align: center; font-family: var(--font-head); font-size: clamp(2.2rem, 7vw, 4.4rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1.05; color: #F2F6F3; overflow-wrap: anywhere; }
.ltn-arc-face__meaning { margin: 8px 0 0; font-family: var(--font-head); font-size: clamp(1.1rem, 2.4vw, 1.55rem); font-weight: 600; line-height: 1.32; color: #F2F6F3; }
.ltn-arc-face__eg { margin: auto 0 0; padding: 10px 12px; border-radius: 12px; background: #081310; font-family: var(--font-mono); font-size: 0.88rem; color: #A5F7DA; white-space: pre-wrap; overflow-wrap: anywhere; }
.ltn-arc-pile { display: flex; flex-direction: column; align-items: center; gap: 8px; width: 90px; flex: none; }
.ltn-arc-pile__stack { position: relative; width: 56px; height: 74px; }
.ltn-arc-pile__card { position: absolute; inset: 0; border: 1px solid rgba(139, 125, 255, 0.6); border-radius: 10px; background: rgba(139, 125, 255, 0.14); }
.ltn-arc-pile__card:nth-child(2) { transform: translate(5px, -5px); }
.ltn-arc-pile__card:nth-child(3) { transform: translate(10px, -10px); }
.ltn-arc-pile__num { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 1.4rem; font-weight: 700; color: #C9C2FF; }
.ltn-arc-pile__lbl { font-size: 0.8rem; color: rgba(242, 246, 243, 0.64); }
.ltn-arc-cardctl { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; min-height: 52px; }

/* The phone bar that keeps the targets under your thumb. */
.ltn-arc-thumbbar { display: none; }

/* Phones and narrow windows. */
@media (max-width: 900px) {
	.ltn-arc-q--hotspot, .ltn-arc-q--label { grid-template-columns: minmax(0, 1fr); }
	.ltn-arc-hot__pic img, .ltn-arc-pic img { max-height: 46vh; max-height: 46dvh; }
	.ltn-arc-bins--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
	.ltn-arc-ord { grid-template-columns: minmax(0, 1fr); gap: 22px; }
	.ltn-arc-bins--3 { grid-template-columns: minmax(0, 1fr); }
	.ltn-arc-bin { min-height: 0; }
	.ltn-arc-match { column-gap: 34px; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); }
	.ltn-arc-jack { padding: 8px 10px 8px 8px; font-size: 0.9rem; }
	.ltn-arc-jack .ltn-arc-key { display: none; }
	.ltn-arc-pile { display: none; }
	.ltn-arc-pin { width: 24px; height: 24px; border-width: 2px; font-size: 0.72rem; }
	.ltn-arc-thumbbar {
		position: sticky; bottom: 0; z-index: 3;
		display: flex; flex-direction: column; gap: 8px;
		padding: 12px; border: 1px solid rgba(125, 242, 200, 0.45); border-radius: 16px;
		background: rgba(11, 26, 22, 0.97); box-shadow: 0 -14px 30px rgba(0, 0, 0, 0.5);
		animation: ltn-arc-in 0.18s ease-out;
	}
	.ltn-arc-thumbbar__lbl { font-size: 0.9rem; font-weight: 600; color: #A5F7DA; overflow-wrap: anywhere; }
	.ltn-arc-thumbbar__row { display: flex; flex-wrap: wrap; gap: 8px; }
	.ltn-arc-thumbbar__btn {
		flex: 1 1 auto; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
		min-width: 46px; min-height: 46px; padding: 0 12px;
		border: 1px solid rgba(125, 242, 200, 0.6); border-radius: 12px;
		background: rgba(125, 242, 200, 0.1); color: #F2F6F3;
		font-family: var(--font-body); font-size: 0.95rem; font-weight: 600; cursor: pointer;
	}
	.ltn-arc-thumbbar__btn:focus-visible { outline: 2px solid #7DF2C8; outline-offset: 2px; }
	.ltn-arc-thumbbar__btn .ltn-arc-key { min-width: 24px; height: 24px; font-size: 0.7rem; }
}
@media (max-width: 420px) {
	.ltn-arc-bins--2, .ltn-arc-bins--4 { grid-template-columns: minmax(0, 1fr); }
	.ltn-arc-tune__gap { flex-basis: 100%; }
}

@media (prefers-reduced-motion: reduce) {
	.ltn-arc-flip__inner { transition: none; }
	.ltn-arc-hop.is-next .ltn-arc-hop__num, .ltn-arc-hop__card, .ltn-arc-chip--in, .ltn-arc-box.is-filled,
	.ltn-arc-jack.is-wrong, .ltn-arc-cable, .ltn-arc-dial__ans, .ltn-arc-scale__flag { animation: none; }
	.ltn-arc-pin, .ltn-arc-tile, .ltn-arc-chip { transition: none; }
}

/* ---- Arcade page: the game cards ([ltn_arcade_games]) ---------------------- */

.ltn-arc-hub {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
	gap: var(--sp-3);
}
.ltn-arc-card {
	display: flex; flex-direction: column;
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--r-lg);
	overflow: hidden;
	color: var(--text);
	text-decoration: none;
	transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.ltn-arc-card:hover {
	border-color: var(--accent);
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
	color: var(--text);
	text-decoration: none;
}
.ltn-arc-card:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.ltn-arc-card__img {
	display: block;
	aspect-ratio: 4 / 3;
	background: var(--code-bg);
	border-bottom: 1px solid var(--border);
}
.ltn-arc-card__img img { display: block; width: 100%; height: 100%; object-fit: contain; }
.ltn-arc-card__body { display: flex; flex-direction: column; gap: 6px; padding: var(--sp-2) var(--sp-3) var(--sp-3); }
.ltn-arc-card__kicker {
	font-family: var(--font-mono); font-size: var(--fs-xs);
	letter-spacing: var(--track-wide); text-transform: uppercase;
	color: var(--accent);
}
.ltn-arc-card__title { font-family: var(--font-head); font-size: var(--fs-lg); line-height: var(--lh-snug); }
.ltn-arc-card__desc { font-size: var(--fs-sm); color: var(--text-muted); line-height: var(--lh-body); }
.ltn-arc-hub__note { margin-top: var(--sp-3); font-size: var(--fs-sm); color: var(--text-muted); }

@media (prefers-reduced-motion: reduce) {
	.ltn-arc-card { transition: none; }
	.ltn-arc-card:hover { transform: none; }
}