main {
	gap: 1.5rem;
}

.experiment-intro {
	position: relative;
	max-width: min(760px, 100%);
	padding: 1.8rem;
	border: 1px solid rgba(210, 233, 231, 0.08);
	border-radius: 24px;
	background:
		linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01)),
		linear-gradient(135deg, rgba(17, 17, 17, 0.95), rgba(25, 33, 41, 0.9));
	box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
	overflow: clip;
}

.experiment-intro::before {
	content: "";
	position: absolute;
	top: -54px;
	right: -56px;
	width: 205px;
	height: 205px;
	background: radial-gradient(circle, rgba(248, 145, 91, 0.14) 0%, rgba(248, 145, 91, 0.08) 28%, transparent 72%);
	filter: blur(28px);
	pointer-events: none;
}

.experiment-intro h2 {
	position: relative;
	margin-bottom: 1.2rem;
	padding-bottom: 0.8rem;
	font-size: clamp(1.3rem, 1.7vw, 1.75rem);
	color: #f3dcc9;
}

.experiment-intro h2::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 0;
	width: min(250px, 58%);
	height: 1px;
	background: linear-gradient(90deg, rgba(248, 145, 91, 0.45), transparent);
}

.experiment-intro p {
	color: #d7dde1;
	margin-bottom: 1.35rem;
}

.experiment-intro p:last-child {
	margin-bottom: 0;
	display: flex;
	justify-content: center;
}

.experiment-container {
	max-width: min(760px, 100%);
}

.experiment-intro {
	display: block;
}

.experiment-container {
	display: none;
}

body.experiment-active .experiment-intro {
	display: none;
}

body.experiment-active .experiment-container {
	display: block;
}

.start-experiment-button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0.75rem 1.5rem;
	border: 1px solid var(--hover-color);
	border-radius: 999px;
	background: transparent;
	color: var(--hover-color);
	font: inherit;
	font-size: 0.92rem;
	font-weight: 500;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	cursor: pointer;
	transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.start-experiment-button:hover,
.start-experiment-button:focus-visible {
	border-color: var(--header-color);
	background: rgba(248, 145, 91, 0.12);
	color: #ffd5bf;
	transform: translateY(-1px);
}

.experiment-status {
	border: 1px solid rgba(210, 233, 231, 0.16);
	border-radius: 14px;
	background: rgba(0, 0, 0, 0.2);
	padding: 0.9rem 1rem;
}

.experiment-status p {
	margin: 0;
	display: flex;
	justify-content: center;
	color: #d7dde1;
	font-size: 0.9rem;
	line-height: 1.55;
}

#start-experiment-run {
	animation: start-button-pulse 1.8s ease-in-out infinite;
}

body.experiment-running #start-experiment-run {
	animation: none;
}

@keyframes start-button-pulse {
	0%,
	100% {
		transform: scale(1);
		box-shadow: 0 0 0 0 rgba(248, 145, 91, 0.36);
	}

	50% {
		transform: scale(1.03);
		box-shadow: 0 0 0 10px rgba(248, 145, 91, 0);
	}
}

.experiment-display {
	position: relative;
	display: grid;
	gap: 1rem;
	padding: 1.45rem;
	border: 1px solid rgba(248, 145, 91, 0.25);
	border-radius: 26px;
	background:
		radial-gradient(circle at top left, rgba(248, 145, 91, 0.14), transparent 40%),
		linear-gradient(120deg, rgba(13, 14, 15, 0.84) 10%, rgba(13, 14, 15, 0.62) 42%, rgba(13, 14, 15, 0.24) 72%),
		linear-gradient(135deg, rgba(95, 43, 28, 0.42), rgba(40, 67, 82, 0.28));
	box-shadow:
		0 0 26px -5px rgba(248, 145, 91, 0.6),
		inset 0 0 2px 1px rgba(248, 145, 91, 0.66),
		inset 0 0 12px rgba(38, 47, 59, 0.92),
		inset 0 50px 100px rgba(95, 43, 28, 0.32);
}

.experiment-choices {
	display: grid;
	grid-template-columns: repeat(2, max-content);
	justify-content: center;
	gap: clamp(0.9rem, 3vw, 2.2rem);
}

.choice {
	display: grid;
	place-items: center;
	width: 40vw;
	aspect-ratio: 4 / 7;
	border: 1px solid rgba(210, 233, 231, 0.25);
	border-radius: 14px;
	background: rgba(0, 0, 0, 0.22);
	color: var(--header-color);
	font-size: clamp(4.2rem, 12vw, 10.3rem);
	font-weight: 500;
	letter-spacing: 0.04em;
	user-select: none;
	pointer-events: none;
	transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

@media (min-width: 1000px) {
	.choice {
		height: 50vh;
		width: auto;
		max-height: 620px;
	}
}

.choice:hover,
.choice:focus-visible {
	border-color: var(--hover-color);
	background: rgba(248, 145, 91, 0.12);
	color: #ffd5bf;
	transform: translateY(-1px);
}

.experiment-timer,
.experiment-result {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 3.35rem;
	border-radius: 999px;
	border: 1px solid rgba(210, 233, 231, 0.22);
	background: rgba(13, 14, 15, 0.36);
	color: var(--header-color);
	font-weight: 500;
	letter-spacing: 0.08em;
	text-align: center;
}

.experiment-timer {
	color: #ffd5bf;
	border-color: rgba(248, 145, 91, 0.34);
	background: rgba(248, 145, 91, 0.08);
	border-radius: 4px;
	font-size: clamp(1.05rem, 2.5vw, 1.35rem);
	font-family: "Roboto Mono", monospace;
	font-variant-numeric: tabular-nums lining-nums;
	font-feature-settings: "tnum" 1, "lnum" 1;
	box-sizing: content-box;
	padding-inline: 1.2rem;
	min-width: 8ch;
	width: fit-content;
	white-space: nowrap;
	margin-inline: auto;
}

.experiment-result {
	font-size: clamp(1.3rem, 3.3vw, 1.85rem);
}

.post-run-choice {
	display: none;
	gap: 0.8rem;
	border: 1px solid rgba(210, 233, 231, 0.22);
	border-radius: 14px;
	background: rgba(0, 0, 0, 0.2);
	padding: 0.9rem 1rem;
}

body.experiment-choice-open .post-run-choice {
	display: grid;
}

.post-run-choice-title {
	margin: 0;
	text-align: center;
	color: #d7dde1;
	font-size: 0.95rem;
	line-height: 1.4;
}

.post-run-choice-buttons {
	display: grid;
	grid-template-columns: repeat(2, minmax(140px, 1fr));
	gap: 0.75rem;
}

.post-run-choice-buttons .start-experiment-button {
	width: 100%;
	padding-inline: 1rem;
	letter-spacing: 0.05em;
}

.post-run-choice-feedback {
	margin: 0;
	text-align: center;
	min-height: 1.3rem;
	color: #ffd5bf;
	font-size: 0.88rem;
	letter-spacing: 0.03em;
}

footer p {
	margin: 0;
	padding: 1rem 1.5rem;
	color: var(--header-color);
	font-size: 0.8rem;
	letter-spacing: 0.1em;
	text-transform: uppercase;
}

@media (max-width: 900px) {
	.experiment-intro,
	.experiment-display {
		border-radius: 18px;
	}
}

@media (max-width: 760px) {
	.experiment-intro,
	.experiment-display {
		padding: 1.25rem 1rem;
	}
}

@media (max-width: 480px) {
	main {
		gap: 1rem;
	}

	.experiment-intro,
	.experiment-display {
		border-radius: 16px;
	}

	.choice {
		width: 39vw;
		font-size: clamp(2.5rem, 10vw, 3.6rem);
	}

	.post-run-choice-buttons {
		grid-template-columns: 1fr;
	}
}