/* Prevent Flash of Invisible Text (FOIT) */
@font-face {
	font-family: 'Plus Jakarta Sans';
	font-display: swap;
}
@font-face {
	font-family: 'Space Grotesk';
	font-display: swap;
}

/* Custom theme variables */
:root {
	--ui-primary: #0f172a;
	--ui-accent: #2563eb;
	--ui-success: #22c55e;
	--ui-warning: #f59e0b;
	--ui-danger: #ef4444;
	--ui-muted: #d1d5db;
	--ui-surface: #ffffff;
	--ui-text: #111827;
	--ui-border: #e5e7eb;
}

/* Question grid navigation */
.question-grid {
	display: grid;
	grid-template-columns: repeat(5, minmax(0, 1fr));
	gap: 0.5rem;
}

.question-grid .question-btn {
	border: 1px solid var(--ui-border);
	border-radius: 0.5rem;
	padding: 0.55rem 0.25rem;
	text-align: center;
	font-size: 0.875rem;
	font-weight: 700;
	transition: all 0.2s ease;
}

.question-grid .question-btn:hover {
	transform: translateY(-1px);
	box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.question-grid .status-answered {
	background: var(--ui-success);
	color: #fff;
}

.question-grid .status-doubt {
	background: var(--ui-warning);
	color: #fff;
}

.question-grid .status-unanswered {
	background: var(--ui-danger);
	color: #fff;
}

.question-grid .status-locked {
	background: var(--ui-muted);
	color: #374151;
	cursor: not-allowed;
}

/* Timer */
.exam-timer {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	border-radius: 9999px;
	background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
	color: #fff;
	padding: 0.5rem 1rem;
	font-weight: 700;
	letter-spacing: 0.02em;
}

.exam-timer.warning {
	background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
}

.exam-timer.danger {
	background: linear-gradient(135deg, #b91c1c 0%, #ef4444 100%);
}

/* Result cards */
.result-card {
	border-radius: 1rem;
	border: 1px solid var(--ui-border);
	background: var(--ui-surface);
	padding: 1.25rem;
	box-shadow: 0 8px 18px rgba(2, 6, 23, 0.05);
	opacity: 0;
	transform: translateY(12px);
	animation: card-up 0.55s ease forwards;
}

.result-card:nth-child(2) { animation-delay: 0.08s; }
.result-card:nth-child(3) { animation-delay: 0.16s; }
.result-card:nth-child(4) { animation-delay: 0.24s; }

@keyframes card-up {
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Loading animation */
.loading-overlay {
	position: fixed;
	inset: 0;
	z-index: 1000;
	background: rgba(15, 23, 42, 0.45);
	display: flex;
	align-items: center;
	justify-content: center;
}

.loading-spinner {
	width: 2.75rem;
	height: 2.75rem;
	border-radius: 9999px;
	border: 4px solid rgba(255, 255, 255, 0.35);
	border-top-color: #fff;
	animation: spin 0.85s linear infinite;
}

@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

/* Responsive */
@media (max-width: 1024px) {
	.question-grid {
		grid-template-columns: repeat(6, minmax(0, 1fr));
	}
}

@media (max-width: 768px) {
	.question-grid {
		grid-template-columns: repeat(5, minmax(0, 1fr));
	}

	.exam-timer {
		width: 100%;
		justify-content: center;
		border-radius: 0.75rem;
	}

	.result-card {
		padding: 1rem;
	}
}

@media (max-width: 480px) {
	.question-grid {
		grid-template-columns: repeat(4, minmax(0, 1fr));
		gap: 0.4rem;
	}

	.question-grid .question-btn {
		padding: 0.45rem 0.15rem;
		font-size: 0.78rem;
	}
}