/**
 * Brain Games by AI Viral Lab
 * Self-contained stylesheet. No external fonts, no CDN requests.
 */

.zad-bg-outer {
	max-width: 100%;
}

.zad-bg {
	--zad-accent: #7c3aed;
	--zad-accent-2: #a855f7;
	--zad-bg: #ffffff;
	--zad-surface: #f6f6fb;
	--zad-surface-2: #ececf6;
	--zad-border: rgba(17, 17, 34, 0.1);
	--zad-text: #15152b;
	--zad-muted: #5c5c78;
	--zad-good: #059669;
	--zad-bad: #dc2626;
	--zad-warn: #d97706;
	--zad-radius: 16px;
	--zad-shadow: 0 10px 30px rgba(18, 18, 45, 0.08);
	--zad-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

	box-sizing: border-box;
	position: relative;
	display: block;
	width: 100%;
	padding: clamp(14px, 3vw, 26px);
	border: 1px solid var(--zad-border);
	border-radius: var(--zad-radius);
	background: var(--zad-bg);
	color: var(--zad-text);
	font-family: var(--zad-font);
	font-size: 16px;
	line-height: 1.5;
	box-shadow: var(--zad-shadow);
	-webkit-tap-highlight-color: transparent;
}

.zad-bg *,
.zad-bg *::before,
.zad-bg *::after {
	box-sizing: border-box;
}

.zad-bg--accent-cyan { --zad-accent: #0891b2; --zad-accent-2: #06b6d4; }
.zad-bg--accent-emerald { --zad-accent: #059669; --zad-accent-2: #10b981; }
.zad-bg--accent-amber { --zad-accent: #d97706; --zad-accent-2: #f59e0b; }
.zad-bg--accent-rose { --zad-accent: #e11d48; --zad-accent-2: #f43f5e; }

.zad-bg--theme-dark,
.zad-bg--theme-auto.is-dark {
	--zad-bg: #0f1020;
	--zad-surface: #191a31;
	--zad-surface-2: #23253f;
	--zad-border: rgba(255, 255, 255, 0.12);
	--zad-text: #f3f3fb;
	--zad-muted: #a2a3c0;
	--zad-shadow: 0 10px 34px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
	.zad-bg--theme-auto {
		--zad-bg: #0f1020;
		--zad-surface: #191a31;
		--zad-surface-2: #23253f;
		--zad-border: rgba(255, 255, 255, 0.12);
		--zad-text: #f3f3fb;
		--zad-muted: #a2a3c0;
		--zad-shadow: 0 10px 34px rgba(0, 0, 0, 0.35);
	}
}

/* ---------- Header ---------- */

.zad-bg__top {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 14px;
}

.zad-bg__brandline {
	display: flex;
	align-items: center;
	gap: 10px;
	min-width: 0;
}

.zad-bg__mark {
	display: grid;
	place-items: center;
	width: 38px;
	height: 38px;
	flex: 0 0 38px;
	border-radius: 11px;
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	color: #fff;
	font-weight: 800;
	font-size: 15px;
	letter-spacing: 0.5px;
}

.zad-bg__titles { min-width: 0; }

.zad-bg__title {
	margin: 0;
	font-size: clamp(17px, 2.4vw, 22px);
	font-weight: 800;
	line-height: 1.2;
	color: var(--zad-text);
}

.zad-bg__subtitle {
	margin: 2px 0 0;
	font-size: 13px;
	color: var(--zad-muted);
}

.zad-bg__tools {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.zad-bg__btn {
	appearance: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 7px;
	min-height: 40px;
	padding: 9px 16px;
	border: 1px solid var(--zad-border);
	border-radius: 999px;
	background: var(--zad-surface);
	color: var(--zad-text);
	font: inherit;
	font-size: 14px;
	font-weight: 600;
	cursor: pointer;
	transition: transform 0.12s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.zad-bg__btn:hover { background: var(--zad-surface-2); }
.zad-bg__btn:active { transform: scale(0.97); }

.zad-bg__btn:focus-visible,
.zad-bg__tile:focus-visible,
.zad-bg__pad:focus-visible,
.zad-bg__opt:focus-visible,
.zad-bg__card:focus-visible {
	outline: 3px solid var(--zad-accent-2);
	outline-offset: 2px;
}

.zad-bg__btn--primary {
	border-color: transparent;
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	color: #fff;
	box-shadow: 0 6px 18px rgba(124, 58, 237, 0.28);
}

.zad-bg__btn--primary:hover { filter: brightness(1.06); background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2)); }

.zad-bg__btn--ghost { background: transparent; }

.zad-bg__btn--lg { min-height: 48px; padding: 12px 26px; font-size: 16px; }

/* ---------- Stats bar ---------- */

.zad-bg__stats {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
	gap: 8px;
	margin-bottom: 14px;
}

.zad-bg__stat {
	padding: 9px 12px;
	border-radius: 12px;
	background: var(--zad-surface);
	border: 1px solid var(--zad-border);
	text-align: center;
}

.zad-bg__stat-label {
	display: block;
	font-size: 11px;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--zad-muted);
}

.zad-bg__stat-value {
	display: block;
	font-size: 18px;
	font-weight: 800;
	font-variant-numeric: tabular-nums;
}

.zad-bg__xpbar {
	height: 8px;
	margin-bottom: 16px;
	border-radius: 999px;
	background: var(--zad-surface-2);
	overflow: hidden;
}

.zad-bg__xpfill {
	height: 100%;
	width: 0;
	border-radius: 999px;
	background: linear-gradient(90deg, var(--zad-accent), var(--zad-accent-2));
	transition: width 0.5s ease;
}

/* ---------- Hub ---------- */

.zad-bg__grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: 12px;
}

.zad-bg__card {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 6px;
	padding: 16px;
	border: 1px solid var(--zad-border);
	border-radius: 14px;
	background: var(--zad-surface);
	text-align: left;
	cursor: pointer;
	font: inherit;
	color: inherit;
	transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.zad-bg__card:hover {
	transform: translateY(-3px);
	border-color: var(--zad-accent-2);
	box-shadow: 0 12px 26px rgba(18, 18, 45, 0.14);
}

.zad-bg__card-emoji { font-size: 26px; line-height: 1; }
.zad-bg__card-title { font-size: 16px; font-weight: 800; }
.zad-bg__card-desc { font-size: 13px; color: var(--zad-muted); }

.zad-bg__card-meta {
	margin-top: 6px;
	font-size: 12px;
	font-weight: 700;
	color: var(--zad-accent);
	font-variant-numeric: tabular-nums;
}

.zad-bg__badge {
	position: absolute;
	top: 10px;
	right: 10px;
	padding: 3px 9px;
	border-radius: 999px;
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	color: #fff;
	font-size: 10px;
	font-weight: 800;
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

/* ---------- Game shell ---------- */

.zad-bg__hud {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-bottom: 14px;
}

.zad-bg__chip {
	padding: 6px 12px;
	border-radius: 999px;
	background: var(--zad-surface);
	border: 1px solid var(--zad-border);
	font-size: 13px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
}

.zad-bg__chip b { color: var(--zad-accent); }
.zad-bg__chip--danger { color: var(--zad-bad); }

.zad-bg__status {
	margin: 0 0 12px;
	min-height: 24px;
	font-size: 15px;
	font-weight: 700;
	color: var(--zad-muted);
}

.zad-bg__status--good { color: var(--zad-good); }
.zad-bg__status--bad { color: var(--zad-bad); }

.zad-bg__board { margin-bottom: 14px; }

/* Memory match */

.zad-bg__tiles {
	display: grid;
	gap: 8px;
	max-width: 560px;
	margin: 0 auto;
}

.zad-bg__tile {
	position: relative;
	aspect-ratio: 1 / 1;
	min-height: 48px;
	border: 0;
	border-radius: 12px;
	background: transparent;
	padding: 0;
	cursor: pointer;
	perspective: 700px;
	font: inherit;
}

.zad-bg__tile-inner {
	position: absolute;
	inset: 0;
	border-radius: 12px;
	transition: transform 0.35s ease;
	transform-style: preserve-3d;
}

.zad-bg__tile.is-up .zad-bg__tile-inner,
.zad-bg__tile.is-done .zad-bg__tile-inner { transform: rotateY(180deg); }

.zad-bg__tile-face {
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	border-radius: 12px;
	backface-visibility: hidden;
	-webkit-backface-visibility: hidden;
	font-size: clamp(20px, 5vw, 30px);
	border: 1px solid var(--zad-border);
}

.zad-bg__tile-back {
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	color: #fff;
	font-weight: 800;
}

.zad-bg__tile-front {
	background: var(--zad-surface);
	transform: rotateY(180deg);
}

.zad-bg__tile.is-done { cursor: default; }
.zad-bg__tile.is-done .zad-bg__tile-front { border-color: var(--zad-good); box-shadow: inset 0 0 0 2px var(--zad-good); }

/* Sequence pads */

.zad-bg__pads {
	display: grid;
	gap: 10px;
	max-width: 420px;
	margin: 0 auto;
}

.zad-bg__pad {
	aspect-ratio: 1 / 1;
	min-height: 56px;
	border: 1px solid var(--zad-border);
	border-radius: 14px;
	background: var(--zad-surface);
	cursor: pointer;
	transition: transform 0.1s ease, filter 0.1s ease, box-shadow 0.15s ease;
	font: inherit;
}

.zad-bg__pad.is-lit {
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	box-shadow: 0 0 28px rgba(124, 58, 237, 0.55);
	transform: scale(1.04);
}

.zad-bg__pad.is-bad { background: var(--zad-bad); }

/* Number memory grid */

.zad-bg__numgrid {
	display: grid;
	grid-template-columns: repeat(5, 1fr);
	gap: 8px;
	max-width: 440px;
	margin: 0 auto;
}

.zad-bg__num {
	aspect-ratio: 1 / 1;
	min-height: 48px;
	border: 1px solid var(--zad-border);
	border-radius: 12px;
	background: var(--zad-surface);
	color: var(--zad-text);
	font: inherit;
	font-size: clamp(16px, 4vw, 22px);
	font-weight: 800;
	cursor: pointer;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.15s ease, transform 0.12s ease;
}

.zad-bg__num.is-on { opacity: 1; pointer-events: auto; }
.zad-bg__num.is-hidden { color: transparent; background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2)); }
.zad-bg__num.is-cleared { opacity: 0.25; pointer-events: none; }
.zad-bg__num.is-bad { background: var(--zad-bad); color: #fff; }

/* Question games */

.zad-bg__question {
	margin: 0 0 16px;
	padding: 22px 16px;
	border-radius: 14px;
	background: var(--zad-surface);
	border: 1px solid var(--zad-border);
	text-align: center;
	font-size: clamp(22px, 6vw, 34px);
	font-weight: 800;
	font-variant-numeric: tabular-nums;
	letter-spacing: 0.02em;
}

.zad-bg__options {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
	gap: 10px;
}

.zad-bg__opt {
	min-height: 56px;
	padding: 12px;
	border: 1px solid var(--zad-border);
	border-radius: 13px;
	background: var(--zad-surface);
	color: var(--zad-text);
	font: inherit;
	font-size: 19px;
	font-weight: 800;
	font-variant-numeric: tabular-nums;
	cursor: pointer;
	transition: transform 0.12s ease, background 0.2s ease;
}

.zad-bg__opt:hover { background: var(--zad-surface-2); }
.zad-bg__opt:active { transform: scale(0.97); }
.zad-bg__opt.is-good { background: var(--zad-good); border-color: var(--zad-good); color: #fff; }
.zad-bg__opt.is-bad { background: var(--zad-bad); border-color: var(--zad-bad); color: #fff; }

.zad-bg__timer {
	height: 10px;
	margin-bottom: 14px;
	border-radius: 999px;
	background: var(--zad-surface-2);
	overflow: hidden;
}

.zad-bg__timer-fill {
	height: 100%;
	width: 100%;
	background: linear-gradient(90deg, var(--zad-accent), var(--zad-accent-2));
	transition: width 0.25s linear;
}

.zad-bg__timer-fill.is-low { background: var(--zad-bad); }

/* Intro / result panels */

.zad-bg__panel {
	padding: clamp(18px, 4vw, 34px) 18px;
	border-radius: 16px;
	background: var(--zad-surface);
	border: 1px solid var(--zad-border);
	text-align: center;
}

.zad-bg__panel h4 {
	margin: 0 0 6px;
	font-size: clamp(20px, 4vw, 26px);
	font-weight: 800;
}

.zad-bg__panel p { margin: 0 0 14px; color: var(--zad-muted); }

.zad-bg__bigscore {
	font-size: clamp(38px, 11vw, 62px);
	font-weight: 900;
	line-height: 1;
	background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2));
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
	font-variant-numeric: tabular-nums;
}

.zad-bg__panel-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin-top: 16px;
}

.zad-bg__pill {
	display: inline-block;
	margin: 4px 4px 0;
	padding: 5px 12px;
	border-radius: 999px;
	background: var(--zad-surface-2);
	font-size: 12px;
	font-weight: 700;
}

.zad-bg__pill--new { background: linear-gradient(135deg, var(--zad-accent), var(--zad-accent-2)); color: #fff; }

/* Footer */

.zad-bg__foot {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	align-items: center;
	justify-content: space-between;
	margin-top: 16px;
	padding-top: 12px;
	border-top: 1px solid var(--zad-border);
	font-size: 12px;
	color: var(--zad-muted);
}

.zad-bg__foot a { color: var(--zad-accent); text-decoration: none; font-weight: 700; }
.zad-bg__foot a:hover { text-decoration: underline; }

.zad-bg__link-btn {
	border: 0;
	background: none;
	padding: 0;
	color: var(--zad-muted);
	font: inherit;
	font-size: 12px;
	text-decoration: underline;
	cursor: pointer;
}

.zad-bg-noscript {
	margin: 0;
	padding: 16px;
	border-radius: 12px;
	background: #fff3cd;
	color: #664d03;
}

.zad-bg__sr {
	position: absolute !important;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* Feedback animations */

@keyframes zad-bg-pop {
	0% { transform: scale(0.84); opacity: 0; }
	60% { transform: scale(1.04); opacity: 1; }
	100% { transform: scale(1); opacity: 1; }
}

.zad-bg__pop { animation: zad-bg-pop 0.28s ease-out; }

@keyframes zad-bg-shake {
	0%, 100% { transform: translateX(0); }
	25% { transform: translateX(-6px); }
	75% { transform: translateX(6px); }
}

.zad-bg__shake { animation: zad-bg-shake 0.3s ease-in-out; }

.zad-bg__float {
	position: absolute;
	pointer-events: none;
	font-weight: 900;
	font-size: 20px;
	color: var(--zad-good);
	animation: zad-bg-float 0.9s ease-out forwards;
	z-index: 5;
}

@keyframes zad-bg-float {
	from { opacity: 1; transform: translateY(0); }
	to { opacity: 0; transform: translateY(-46px); }
}

.zad-bg__confetti {
	position: absolute;
	top: -12px;
	width: 9px;
	height: 14px;
	border-radius: 2px;
	pointer-events: none;
	z-index: 4;
	animation: zad-bg-fall 1.5s linear forwards;
}

@keyframes zad-bg-fall {
	to { transform: translateY(340px) rotate(620deg); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
	.zad-bg *,
	.zad-bg *::before,
	.zad-bg *::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
}

@media (max-width: 480px) {
	.zad-bg__stats { grid-template-columns: repeat(2, 1fr); }
	.zad-bg__grid { grid-template-columns: 1fr; }
	.zad-bg__options { grid-template-columns: repeat(2, 1fr); }
	.zad-bg__numgrid { grid-template-columns: repeat(4, 1fr); }
}