.rt-wrap {
	--rt-accent: #4dff4d;
	--rt-on-accent: #000;
	--rt-line: rgba(128, 128, 128, .28);
	--rt-soft: rgba(128, 128, 128, .08);
	--rt-radius: 14px;
	--rt-good: #2ecc71;
	--rt-bad: #ff5c5c;
	max-width: 760px;
	margin: 0 auto;
	padding: 1.5rem;
	font: inherit;
	color: inherit;
	box-sizing: border-box;
}
.rt-wrap *, .rt-wrap *::before, .rt-wrap *::after { box-sizing: border-box; }
.rt-wrap [hidden] { display: none !important; }
.rt-wrap a { text-decoration: none; color: inherit; }

.rt-dark { --rt-text: #f5f5f5; --rt-line: rgba(255, 255, 255, .18); --rt-soft: rgba(255, 255, 255, .06); color: var(--rt-text); }
.rt-light { --rt-text: #111; --rt-line: rgba(0, 0, 0, .16); --rt-soft: rgba(0, 0, 0, .04); color: var(--rt-text); }
.rt-dark h2, .rt-dark h3, .rt-dark p, .rt-dark label, .rt-dark span, .rt-dark strong,
.rt-light h2, .rt-light h3, .rt-light p, .rt-light label, .rt-light span, .rt-light strong { color: inherit; }

/* Sponsor banner: label, heading and blurb on the left, button on the right */
.rt-sponsor {
	display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
	margin: 0 0 1.5rem; padding: 1.5rem 1.75rem;
	border: 1px solid var(--rt-line); border-radius: var(--rt-radius); background: var(--rt-soft);
}
.rt-sponsor--open { border-style: dashed; }
.rt-sponsor__copy { display: grid; gap: .35rem; min-width: 0; }
.rt-sponsor__label { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; opacity: .6; }
.rt-sponsor__name { font-size: clamp(1.15rem, 2.4vw, 1.45rem); font-weight: 800; line-height: 1.2; }
.rt-sponsor .rt-sponsor__tag { margin: 0; max-width: 46ch; line-height: 1.45; opacity: .85; }
.rt-wrap .rt-sponsor__btn {
	flex: 0 0 auto; display: inline-block; padding: .8rem 1.5rem; border-radius: 10px;
	background: #0e0e0e; color: #fff; font-weight: 700; line-height: 1.2; text-align: center;
	border: 1px solid rgba(255, 255, 255, .12); transition: border-color .15s, transform .1s;
}
.rt-wrap .rt-sponsor__btn:hover { border-color: var(--rt-accent); transform: translateY(-1px); }
.rt-sponsor__btn:focus-visible { outline: 2px solid var(--rt-accent); outline-offset: 2px; }
/* Image banner */
.rt-sponsor--img { display: block; position: relative; padding: 1.6rem 1rem 1rem; text-align: center; }
.rt-sponsor--img .rt-sponsor__label { position: absolute; top: .6rem; left: 1rem; }
.rt-sponsor__link { display: block; }
.rt-sponsor__img { display: block; width: 100%; max-width: 728px; height: auto; margin: 0 auto; border-radius: 8px; }
@media (max-width: 560px) {
	.rt-sponsor { flex-direction: column; align-items: flex-start; padding: 1.25rem; }
	.rt-wrap .rt-sponsor__btn { width: 100%; }
}

/* Card */
.rt-box { border: 1px solid var(--rt-line); border-radius: var(--rt-radius); padding: 1.75rem; background: var(--rt-soft); }
.rt-title { margin: 0 0 .5rem; font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.15; letter-spacing: -.02em; }
.rt-intro { margin: 0 0 1.25rem; opacity: .8; }
.rt-best { margin: 0 0 1.25rem; font-weight: 600; color: var(--rt-accent); }
.rt-msg { opacity: .8; margin: 0 0 1rem; }
.rt-kicker { margin: 0 0 .5rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; opacity: .65; }

.rt-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.25rem; }
.rt-field { display: grid; gap: .35rem; font-size: .85em; font-weight: 600; }
.rt-field select {
	width: 100%; padding: .7rem .85rem; border: 1px solid var(--rt-line); border-radius: 10px;
	background: transparent; color: inherit; font: inherit; font-weight: 400;
}
.rt-field select option { color: #111; }

/* Progress */
.rt-progress { height: 6px; border-radius: 999px; background: var(--rt-line); overflow: hidden; margin-bottom: .75rem; }
.rt-progress__bar { height: 100%; background: var(--rt-accent); transition: width .3s; }
.rt-qmeta { display: flex; justify-content: space-between; font-size: .85em; opacity: .75; margin-bottom: 1rem; }
.rt-chip { display: inline-block; margin-bottom: .6rem; padding: .18rem .65rem; border: 1px solid var(--rt-line); border-radius: 999px; font-size: .75rem; }
.rt-q { margin: 0 0 1.25rem; font-size: clamp(1.25rem, 2.6vw, 1.6rem); line-height: 1.3; outline: none; }

/* Options */
.rt-opts { display: grid; gap: .65rem; }
.rt-opt {
	display: flex; align-items: center; gap: .85rem; width: 100%; text-align: left;
	padding: .9rem 1rem; border: 1px solid var(--rt-line); border-radius: 12px;
	background: transparent; color: inherit; font: inherit; cursor: pointer;
	transition: border-color .15s, background .15s, transform .1s;
}
.rt-opt:hover:not(:disabled) { border-color: var(--rt-accent); transform: translateY(-1px); }
.rt-opt:focus-visible { outline: 2px solid var(--rt-accent); outline-offset: 2px; }
.rt-opt:disabled { cursor: default; }
.rt-opt__key {
	flex: 0 0 30px; width: 30px; height: 30px; border-radius: 8px; border: 1px solid var(--rt-line);
	display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .85rem;
}
.rt-opt.is-correct { border-color: var(--rt-good); background: rgba(46, 204, 113, .15); }
.rt-opt.is-correct .rt-opt__key { background: var(--rt-good); border-color: var(--rt-good); color: #000; }
.rt-opt.is-wrong { border-color: var(--rt-bad); background: rgba(255, 92, 92, .14); }
.rt-opt.is-wrong .rt-opt__key { background: var(--rt-bad); border-color: var(--rt-bad); color: #000; }
.rt-opt.is-dim { opacity: .45; }

/* Feedback */
.rt-feedback { margin-top: 1.1rem; }
.rt-feedback strong { display: block; font-size: 1.05rem; }
.rt-ok { color: var(--rt-good); }
.rt-no { color: var(--rt-bad); }
.rt-wrap .rt-feedback .rt-ok { color: var(--rt-good); }
.rt-wrap .rt-feedback .rt-no { color: var(--rt-bad); }
.rt-explain { margin: .5rem 0; opacity: .85; line-height: 1.55; }
.rt-source { display: inline-block; margin: 0 1rem .5rem 0; font-size: .9em; text-decoration: underline; opacity: .8; }
.rt-feedback .rt-btn { margin-top: .75rem; }

/* Results */
.rt-score { font-size: clamp(3rem, 9vw, 4.5rem); font-weight: 800; line-height: 1; letter-spacing: -.03em; }
.rt-tier { margin: .5rem 0 1.5rem; font-size: 1.25rem; font-weight: 700; color: var(--rt-accent); }
.rt-actions, .rt-cta { display: flex; flex-wrap: wrap; gap: .75rem; }
.rt-cta { margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--rt-line); }

/* Buttons */
.rt-btn {
	display: inline-block; padding: .8rem 1.4rem; border: 1px solid var(--rt-line); border-radius: 10px;
	background: transparent; color: inherit; font: inherit; font-weight: 700; cursor: pointer; line-height: 1.2; text-align: center;
}
.rt-btn:hover { border-color: var(--rt-accent); }
.rt-wrap .rt-btn--accent, .rt-wrap .rt-btn--accent:hover { background: var(--rt-accent); border-color: var(--rt-accent); color: var(--rt-on-accent); }
.rt-btn--accent:hover { opacity: .88; }

@media (max-width: 560px) {
	.rt-wrap { padding: 1rem; }
	.rt-box { padding: 1.25rem; }
	.rt-controls { grid-template-columns: 1fr; }
}

/* Confetti */
.rt-confetti { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 99999; pointer-events: none; }

/* Glitch on a wrong answer */
.rt-box { position: relative; overflow: hidden; }
.rt-glitch { animation: rt-glitch-box .7s steps(2, end) 1; }
.rt-glitch .rt-q, .rt-glitch .rt-opt.is-wrong { animation: rt-glitch-text .7s steps(2, end) 1; }
.rt-glitch::after {
	content: ''; position: absolute; left: 0; right: 0; top: 0; height: 26%;
	background: linear-gradient(180deg, rgba(255, 60, 90, .22), rgba(60, 220, 255, .18));
	mix-blend-mode: screen; pointer-events: none; animation: rt-glitch-bar .7s linear 1;
}
@keyframes rt-glitch-box {
	0%   { transform: translate(0, 0); filter: none; }
	10%  { transform: translate(-6px, 2px) skewX(-4deg); filter: hue-rotate(90deg) saturate(2); }
	20%  { transform: translate(5px, -3px) skewX(3deg); filter: hue-rotate(-60deg); }
	35%  { transform: translate(-3px, 1px); filter: contrast(1.6); }
	50%  { transform: translate(6px, 0) skewX(-2deg); filter: hue-rotate(160deg) saturate(2.4); }
	65%  { transform: translate(-4px, -2px); filter: none; }
	80%  { transform: translate(2px, 1px); }
	100% { transform: translate(0, 0); filter: none; }
}
@keyframes rt-glitch-text {
	0%, 100% { text-shadow: none; }
	15% { text-shadow: 3px 0 #ff2e63, -3px 0 #08f7fe; }
	40% { text-shadow: -4px 0 #ff2e63, 4px 0 #08f7fe; }
	65% { text-shadow: 2px 1px #ff2e63, -2px -1px #08f7fe; }
}
@keyframes rt-glitch-bar { from { top: -30%; opacity: 1; } to { top: 110%; opacity: .2; } }

/* Scoreboard */
.rt-board { margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rt-line); }
.rt-board__title { margin: 0 0 .75rem; font-size: 1.05rem; text-transform: uppercase; letter-spacing: .08em; }
.rt-board__list { list-style: none; margin: 0; padding: 0; display: grid; gap: .4rem; }
.rt-board__row { display: grid; grid-template-columns: 2rem 1fr auto; gap: .75rem; align-items: center; padding: .55rem .8rem; border: 1px solid var(--rt-line); border-radius: 10px; }
.rt-board__row:nth-child(1) .rt-board__rank { color: #ffd23f; }
.rt-board__row:nth-child(2) .rt-board__rank { color: #cfd6df; }
.rt-board__row:nth-child(3) .rt-board__rank { color: #d9955b; }
.rt-board__rank { font-weight: 800; }
.rt-board__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rt-board__score { font-weight: 700; font-variant-numeric: tabular-nums; }
.rt-board__row.is-me { border-color: var(--rt-accent); background: rgba(128, 128, 128, .12); }
.rt-board__count { margin: .75rem 0 0; font-size: .85em; opacity: .65; }

.rt-post { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.25rem; }
.rt-post__name { flex: 1 1 200px; padding: .8rem .95rem; border: 1px solid var(--rt-line); border-radius: 10px; background: transparent; color: inherit; font: inherit; }
.rt-post__name:focus-visible { outline: 2px solid var(--rt-accent); outline-offset: 2px; }
.rt-post__note { margin: .75rem 0 0; font-weight: 700; color: var(--rt-accent); }

@media (prefers-reduced-motion: reduce) {
	.rt-glitch, .rt-glitch .rt-q, .rt-glitch .rt-opt.is-wrong, .rt-glitch::after { animation: none; }
}

/* Second sponsor slot sits under the quiz */
.rt-sponsor--sponsor2 { margin: 1.5rem 0 0; }

/* Level map */
.rt-hint { min-height: 1.4em; margin: .85rem 0 0; font-size: .9em; opacity: .85; }
.rt-map { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: .9rem; margin-top: .5rem; }
.rt-lvl {
	position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .15rem;
	aspect-ratio: 1; padding: .6rem .4rem; border: 0; border-radius: 22px; cursor: pointer; color: #fff; font: inherit;
	background: linear-gradient(160deg, var(--c), color-mix(in srgb, var(--c) 55%, #000));
	box-shadow: 0 5px 0 rgba(0, 0, 0, .45), inset 0 2px 0 rgba(255, 255, 255, .35);
	transition: transform .12s, box-shadow .12s;
}
.rt-lvl:hover { transform: translateY(-3px) rotate(-1deg); }
.rt-lvl:active { transform: translateY(2px); box-shadow: 0 2px 0 rgba(0, 0, 0, .45), inset 0 2px 0 rgba(255, 255, 255, .35); }
.rt-lvl:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
.rt-lvl__n { font-size: 2rem; font-weight: 900; line-height: 1; text-shadow: 0 2px 0 rgba(0, 0, 0, .35); }
.rt-lvl__n--small { font-size: .85rem; opacity: .8; }
.rt-lvl__name { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; opacity: .92; text-align: center; line-height: 1.15; }
.rt-lvl.is-next { animation: rt-pulse 1.6s ease-in-out infinite; }
.rt-lvl.is-locked { background: linear-gradient(160deg, #6b7280, #3b4048); color: rgba(255, 255, 255, .75); box-shadow: 0 5px 0 rgba(0, 0, 0, .45), inset 0 2px 0 rgba(255, 255, 255, .15); cursor: not-allowed; }
.rt-lvl.is-locked:hover { transform: none; }
.rt-lock { width: 30px; height: 30px; fill: rgba(255, 255, 255, .85); color: rgba(255, 255, 255, .85); }
.rt-lvl.is-shake { animation: rt-shake .4s; }
@keyframes rt-pulse { 0%, 100% { box-shadow: 0 5px 0 rgba(0, 0, 0, .45), inset 0 2px 0 rgba(255, 255, 255, .35), 0 0 0 0 rgba(255, 255, 255, .55); } 50% { box-shadow: 0 5px 0 rgba(0, 0, 0, .45), inset 0 2px 0 rgba(255, 255, 255, .35), 0 0 0 9px rgba(255, 255, 255, 0); } }
@keyframes rt-shake { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-6px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(4px); } }

/* Stars */
.rt-stars { display: flex; justify-content: flex-start; gap: .25rem; margin: .25rem 0 .75rem; font-size: 2.2rem; line-height: 1; }
.rt-stars--sm { justify-content: center; margin: .15rem 0 0; font-size: 1rem; gap: .1rem; }
.rt-wrap .rt-star { color: rgba(255, 255, 255, .28); }
.rt-wrap.rt-light .rt-star { color: rgba(0, 0, 0, .18); }
.rt-wrap .rt-lvl .rt-star { color: rgba(0, 0, 0, .35); }
.rt-wrap .rt-lvl.is-locked .rt-star { color: rgba(0, 0, 0, .3); }
.rt-wrap .rt-star.is-on, .rt-wrap.rt-light .rt-star.is-on, .rt-wrap .rt-lvl .rt-star.is-on { color: #ffd23f; text-shadow: 0 0 10px rgba(255, 210, 63, .6), 0 2px 0 rgba(0, 0, 0, .3); }
.rt-stars:not(.rt-stars--sm) .rt-star.is-on { animation: rt-star-pop .5s cubic-bezier(.2, 1.6, .4, 1) both; }
@keyframes rt-star-pop { 0% { transform: scale(0) rotate(-40deg); opacity: 0; } 100% { transform: scale(1) rotate(0); opacity: 1; } }

.rt-board__lv { font-size: .8em; opacity: .7; white-space: nowrap; }
.rt-board__row { grid-template-columns: 2rem 1fr auto auto; }

@media (prefers-reduced-motion: reduce) {
	.rt-lvl.is-next, .rt-lvl.is-shake, .rt-stars:not(.rt-stars--sm) .rt-star.is-on { animation: none; }
}

.rt-board__teaser { margin: 1.5rem 0 0; padding-top: 1.25rem; border-top: 1px solid var(--rt-line); font-size: .9em; opacity: .7; }

.rt-board__proof { font-weight: 700; opacity: 1; }