@keyframes spinGrow {
	0% {
		transform: scale(0.18) rotate(0deg);
		opacity: 0;
	}
	15% {
		opacity: 1;
	}
	100% {
		transform: scale(2.2) rotate(1800deg);
		opacity: 1;
	}
}

@keyframes typing {
	from {
		width: 0ch;
	}
	to {
		width: 30ch;
	}
}

@keyframes blink {
	50% {
		border-color: transparent;
	}
}

@keyframes glowBurst {
	0% {
		transform: translate(-50%, -50%) scale(0.6);
		opacity: 0;
	}
	45% {
		opacity: 0.55;
	}
	100% {
		transform: translate(-50%, -50%) scale(2.2);
		opacity: 0;
	}
}

.logo-wrap {
	position: relative;
	animation: spinGrow 0.85s cubic-bezier(.17, .84, .24, 1) forwards;
	transform-origin: center;
}

.glow-burst {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 170px;
	height: 170px;
	transform: translate(-50%, -50%);
	border-radius: 9999px;
	background: radial-gradient(
		circle,
		rgba(255, 208, 76, 0.9) 0%,
		rgba(255, 196, 0, 0.45) 35%,
		rgba(255, 120, 0, 0.18) 58%,
		rgba(255, 120, 0, 0) 75%
	);
	filter: blur(6px);
	pointer-events: none;
	opacity: 0;
	animation: glowBurst 0.55s ease-out 0.82s forwards;
}

.typed {
	width: 0ch;
	max-width: 100%;
	overflow: hidden;
	white-space: nowrap;
	border-right: 3px solid black;
	animation:
		typing 2s steps(27, end) 0.9s forwards,
		blink 0.7s step-end 0.9s infinite;
}

.hero-shell {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: flex-start;
	overflow-x: hidden;
}

.grade-square-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1rem;
	max-width: 40rem;
	margin: 0 auto;
}

.grade-square-card {
	--accent: #f97316;
	--accent-rgb: 249, 115, 22;
	aspect-ratio: 1.2 / 1;
	position: relative;
	overflow: hidden;
	background:
		radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0) 45%),
		linear-gradient(150deg, #0f172a 0%, #111827 55%, #0b1120 100%);
	color: #f8fafc;
	border: 1px solid #334155;
	border-radius: 1.1rem;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: clamp(1.3rem, 2.2vw, 1.8rem);
	font-weight: 700;
	letter-spacing: 0.02em;
	text-decoration: none;
	box-shadow: 0 12px 28px rgba(2, 6, 23, 0.35);
	transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.grade-square-card::before {
	content: "";
	position: absolute;
	inset: auto -18% -24% auto;
	width: 70%;
	height: 70%;
	border-radius: 9999px;
	background: radial-gradient(circle, rgba(var(--accent-rgb), 0.55), transparent 70%);
	opacity: 0.7;
	transition: transform 0.25s ease, opacity 0.25s ease;
}

.grade-square-card::after {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(130deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0) 40%);
	pointer-events: none;
}

.grade-square-card:hover {
	transform: translateY(-6px);
	border-color: rgba(var(--accent-rgb), 0.8);
	box-shadow: 0 16px 32px rgba(2, 6, 23, 0.45);
}

.grade-square-card:hover::before {
	transform: scale(1.08);
	opacity: 0.9;
}

.grade-square-card:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 3px;
}

.grade-square-card:nth-child(1) {
	--accent: #f59e0b;
	--accent-rgb: 245, 158, 11;
}

.grade-square-card:nth-child(2) {
	--accent: #f97316;
	--accent-rgb: 249, 115, 22;
}

.grade-square-card:nth-child(3) {
	--accent: #ea580c;
	--accent-rgb: 234, 88, 12;
}

.grade-square-card:nth-child(4) {
	--accent: #fb923c;
	--accent-rgb: 251, 146, 60;
}

@media (max-width: 640px) {
	.typed {
		font-size: 1rem;
		letter-spacing: 0.04em;
		width: auto;
		overflow: visible;
		white-space: normal;
		border-right: none;
		animation: none;
	}

	.grade-square-grid {
		grid-template-columns: 1fr;
		gap: 1rem;
	}
}

/* Floating frog styles */
.floating-frog {
	position: fixed;
	right: 1.25rem;
	top: 30vh;
	z-index: 60;
 	pointer-events: none; /* allow clicks to pass through except on bubble */
}

.frog-inner {
 	display: flex;
 	flex-direction: column;
 	align-items: center;
 	gap: 0.5rem;
 	transform: translateY(0);
 	transition: transform 0.25s ease-out;
}

.frog-img {
 	width: 72px;
 	height: auto;
 	filter: drop-shadow(0 6px 12px rgba(2,6,23,0.35));
 	animation: frog-bob 3.6s ease-in-out infinite;
}

.frog-bubble {
 	pointer-events: auto; /* bubble can be clicked */
 	background: rgba(255,255,255,0.95);
 	color: #0b1220;
 	padding: 0.5rem 0.75rem;
 	border-radius: 0.6rem;
 	box-shadow: 0 8px 20px rgba(2,6,23,0.15);
 	font-size: 0.875rem;
 	line-height: 1.15;
 	max-width: 14rem;
 	text-align: center;
}

@keyframes frog-bob {
 	0% { transform: translateY(0); }
 	50% { transform: translateY(-8px) rotate(-2deg); }
 	100% { transform: translateY(0); }
}

/* Reduce or hide frog on small screens to avoid covering content */
@media (max-width: 640px) {
 	.floating-frog { display: none; }
}

/* Frog dialogue UI */
.frog-question {
 	font-weight: 700;
 	margin-bottom: 0.35rem;
}
.frog-options {
 	display: flex;
 	flex-direction: column;
 	gap: 0.35rem;
}
.frog-option {
 	background: #0b1220;
 	color: #fff;
 	border: none;
 	padding: 0.4rem 0.6rem;
 	border-radius: 0.45rem;
 	cursor: pointer;
 	font-size: 0.85rem;
}
.frog-option[disabled], .frog-option[aria-disabled="true"] {
 	opacity: 0.45;
 	cursor: not-allowed;
}
.frog-response {
 	margin-top: 0.5rem;
 	font-size: 0.85rem;
 	color: #0b1220;
}
.frog-response ul { padding-left: 1.1rem; margin: 0.25rem 0; }
.frog-response li { margin-bottom: 0.35rem; }