/* @import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@500&display=swap'); */
*{
	padding: 0;
	margin: 0;
	box-sizing: border-box;
	--guard-height: 60px;
}
body{
	overflow-x: hidden;
}
.backdrop {
    position: fixed;
    inset: 0;
}
.screenguard{
	position: fixed;
	top: 0; left: 0;
	width: 100svw;
	height: 100svh;
	/* z-index: 1; */
}
.top-guard{
	width: 100%;
	height: var(--guard-height);
	display: flex;
	align-items: center;
	justify-content: center;
	backdrop-filter: grayscale(85%);
	-webkit-backdrop-filter: grayscale(85%);
	backdrop-filter: blur(5px);
	-webkit-backdrop-filter: blur(5px);
}
.top-guard .badge {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--text-1);
	border: 1px solid var(--rule);
	color: var(--q-color);
	border: 1px solid var(--q-accent);
	border-radius: 999px;
	padding: 6px 14px;
	margin-bottom: 20px;
}
.top-guard .badge i {
	font-size: 14px;
}
.hub {
    position: relative;
}
#color-screen{
	background: var(--q-bg);
	width: 100svw;
	height: 120svh;
	position: fixed;
	top: 0;
	left: 0;
}
@media screen and (max-width: 540px){
	#qob-drop img{
		transform: scale(0.8);
		opacity: 0.7;
	}
}
#studentHub {
	--bg-0: #0d0d0d;
	--bg-1: #111111;
	--bg-2: #161616d6;
	--rule: #232323;
	--text-0: #f2f2f0;
	--text-1: #8f8f8f;

	--kids: #ffb84d;
	--teen: #4dd0e1;
	--exam: #693e81;
	--core: #7c6fff;
	--general: #6b6b6b;

	/* --font-display: 'Space Grotesk', sans-serif; */
	--font-display: berranger-hand;
	/* --font-body: 'Inter', sans-serif; */
	--font-body: Satoshi;
	--font-mono: 'IBM Plex Mono', monospace;
	--font-platform-caption: Satoshi-Black;

	display: block;
	font-family: var(--font-body);
	color: var(--q-accent);
	padding: 10px 30px 40px;
	width: 100svw;
	margin: 0 auto;
	margin-top: var(--guard-height);
}

#studentHub * {
	box-sizing: border-box;
}

/* ---------- head ---------- */

#studentHub .hub-head {
	text-align: center;
	margin-bottom: 28px;
}

#studentHub h1 {
	font-family: var(--font-display);
	font-weight: 400;
	font-size: clamp(28px, 3vw, 32px);
	line-height: 1.1;
	letter-spacing: -0.09em;
	word-spacing: 0.1em;
	margin: 10px 10px;
}

#studentHub .hub-sub {
	color: var(--text-1);
	font-size: 15px;
	max-width: 460px;
	margin: 0 auto;
}

/* ---------- age rail (signature element) ---------- */

#studentHub .age-rail {
	max-width: 780px;
	margin: 0 auto 10px;
	padding: 0 4px;
}

#studentHub .age-rail-track {
	position: relative;
	height: 4px;
	border-radius: 4px;
	overflow: hidden;
	background: var(--rule);
}

#studentHub .rail-seg {
	position: absolute;
	top: 0;
	height: 100%;
	width: 33.34%;
}

#studentHub .seg--kids {
	left: 66.66%;
	background: var(--kids);
	opacity: 0.85;
}

#studentHub .seg--teen {
	left: 33.33%;
	background: var(--teen);
	opacity: 0.85;
}

#studentHub .seg--exam {
	left: 0;
	background: var(--exam);
	opacity: 0.85;
}

#studentHub .age-rail-ticks {
	position: relative;
	height: 18px;
	margin-top: 6px;
}

#studentHub .tick {
	position: absolute;
	transform: translateX(-50%);
	font-family: var(--font-mono);
	font-size: 11px;
	color: var(--text-1);
}

#studentHub .tick--mid {
	color: var(--text-1);
	opacity: 0.6;
}

/* ---------- cards, shared ---------- */

#studentHub .card {
	display: flex;
	flex-direction: column;
	border: 1px solid var(--rule);
	border-radius: 14px;
	padding: 25px;
	text-decoration: none;
	transition: 
		transform 0.15s ease, 
		border-color 0.15s ease, 
		/* background 0.15s ease */
	;
	backdrop-filter: blur(10px);
	-webkit-backdrop-filter: blur(10px);
}

#studentHub .card:hover {
	transform: translateY(-2px);
	background: var(--q-ball);
}

#studentHub .card:focus-visible {
	outline: 2px solid var(--text-0);
	outline-offset: 2px;
}

#studentHub .card-icon {
	font-size: 22px;
	margin-bottom: 14px;
}

#studentHub .card-age {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--text-1);
	margin-bottom: 8px;
	display: block;
}
#studentHub .card:hover .card-age {
	color: black;
}

#studentHub .card h3 {
	font-family: var(--font-platform-caption);
	font-size: 19px;
	font-weight: 600;
	margin: 0 0 8px;
	color: var(--q-accent);
	letter-spacing: -0.07em;
}
#studentHub .card:hover h3{
	color: var(--text-0);
	text-shadow: 0.5px 1px 1px rgba(0, 0, 0, 0.911);
}

#studentHub .card p {
	font-size: 13.5px;
	line-height: 1.5;
	color: var(--text-1);
	margin: 0 0 18px;
	flex-grow: 1;
}
#studentHub .card:hover p{
	color: var(--q-bg);
}

#studentHub .card-go {
	font-family: var(--font-mono);
	font-size: 12px;
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

#studentHub .card-go i {
	font-size: 14px;
}

#studentHub .card{
	border-color: var(--q-accent);
}
/* per-platform accent (icon + border-top) */

#studentHub .card--kids .card-icon,
#studentHub .card--kids .card-go {
	color: var(--kids);
}

#studentHub .card--kids {
	border-top: 2px solid var(--kids);
}

#studentHub .card--teen .card-icon,
#studentHub .card--teen .card-go {
	color: var(--teen);
}

#studentHub .card--teen {
	border-top: 2px solid var(--teen);
}

#studentHub .card--exam .card-icon,
#studentHub .card--exam .card-go {
	color: var(--exam);
}

#studentHub .card--exam {
	border-top: 2px solid var(--exam);
}

#studentHub .card--general .card-icon,
#studentHub .card--general .card-go {
	color: var(--general);
}

/* ---------- rail-cards row ---------- */

#studentHub .rail-cards {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 16px;
	margin: auto;
	margin-bottom: 20px;
	max-width: 80svw;
}

/* ---------- core (CoRiQuLuM) full-width band ---------- */

#studentHub .card--core {
	flex-direction: row;
	align-items: center;
	justify-content: space-between;
	border-top: none;
	border-left: 2px solid var(--core);
	margin-bottom: 32px;
}

#studentHub .card--core .card-icon,
#studentHub .card--core .card-go {
	color: var(--core);
}

#studentHub .core-left {
	display: flex;
	align-items: flex-start;
	gap: 16px;
}

#studentHub .card--core .card-icon {
	margin-bottom: 0;
	margin-top: 2px;
}

#studentHub .card--core p {
	margin-bottom: 0;
}

#studentHub .card--core .card-go {
	flex-shrink: 0;
	margin-left: 24px;
}

/* ---------- general resources row ---------- */

#studentHub .general-row {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 16px;
	margin-bottom: 48px;
}

/* ---------- footer ---------- */

#studentHub .hub-foot {
	text-align: center;
	font-family: var(--font-mono);
	font-size: 12px;
	color: var(--text-1);
}

#studentHub .hub-foot strong {
	color: var(--text-0);
}

/* ---------- responsive ---------- */

@media (max-width: 720px) {
	/* #studentHub {
		padding: 48px 20px 32px;
	} */

	#studentHub .rail-cards,
	#studentHub .general-row {
		grid-template-columns: 1fr;
	}

	#studentHub .card--core {
		flex-direction: column;
		align-items: flex-start;
		gap: 16px;
	}

	#studentHub .card--core .card-go {
		margin-left: 0;
	}
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
	#studentHub .card {
		transition: none;
	}
}