:root{
	--bg:#0f1724;
	--card:#0b1220;
	--muted:#9aa7bf;
	--accent:#6ee7b7;
	--accent-2:#60a5fa;
	--glass: rgba(255,255,255,0.03);
}

*{box-sizing:border-box}
body{
	font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial;
	margin:24px;
	color:#e6eef8;
	/* animated background gradient */
	background: linear-gradient(270deg,#071024 0%, #071828 40%, #082430 60%, #071024 100%);
	background-size: 600% 600%;
	animation: bgGradient 18s ease infinite;
}

@keyframes bgGradient {
	0%{background-position:0% 50%}
	50%{background-position:100% 50%}
	100%{background-position:0% 50%}
}
main{
	max-width:760px;
	margin:0 auto;
	background:var(--card);
	padding:28px;
	border-radius:12px;
	box-shadow:0 8px 30px rgba(2,6,23,0.6);
}
h1{margin:0 0 6px 0;font-size:1.6rem}
#description{color:var(--muted);margin-bottom:18px}

.question{margin:18px 0;padding:14px;background:var(--glass);border-radius:10px;display:flex;flex-direction:column;gap:12px}
#question-text{font-weight:600}

.slider-wrapper{display:flex;align-items:center;gap:12px}
.value-display{min-width:56px;background:rgba(255,255,255,0.04);padding:8px 12px;border-radius:999px;text-align:center;font-weight:700}

/* hide native number input spinners */
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button{
	-webkit-appearance:none;
	margin:0;
}
input[type=number]{
	-moz-appearance:textfield;
	appearance:textfield;
}

/* specific styling for the editable value display */
#value-display{width:72px;padding:8px;border-radius:999px;border:0;background:rgba(255,255,255,0.03);color:inherit;text-align:center}

/* Range slider styles */
input[type=range]{-webkit-appearance:none;width:100%;height:22px;background:transparent;display:block}
input[type=range]:focus{outline:none}
input[type=range]::-webkit-slider-runnable-track{height:8px;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px;background-repeat:no-repeat;background-size:100% 100%}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;margin-top:-6px;width:22px;height:22px;border-radius:50%;background:linear-gradient(180deg,#fff,#e6eef8);box-shadow:0 4px 12px rgba(96,165,250,0.18);position:relative;z-index:2}
input[type=range]::-moz-range-track{height:8px;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px;background-repeat:no-repeat;background-size:100% 100%}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:none}

.question-nav{display:flex;align-items:center;justify-content:space-between;gap:12px}
#question-progress{color:var(--muted);font-size:0.9rem}

button{cursor:pointer;border:0;padding:10px 14px;border-radius:10px;font-weight:600}
#next-question{background:transparent;color:var(--accent-2);border:1px solid rgba(96,165,250,0.15)}
#next-question:hover{box-shadow:0 6px 18px rgba(96,165,250,0.08)}
#submit{margin-top:16px;padding:12px 16px;background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#04202a;border-radius:12px;font-size:1rem}
#submit[disabled]{opacity:0.5;cursor:not-allowed}

#leaderboard{margin-top:22px;background:rgba(255,255,255,0.02);padding:14px;border-radius:8px;display:none}
#results{padding-left:18px}

@media (max-width:520px){
	main{padding:18px}
	.value-display{min-width:44px}
}