:root {
	--aipc-primary: #0ea5e9;
	--aipc-primary-hover: #0284c7;
	--aipc-bg: #ffffff;
	--aipc-bg-alt: #f8fafc;
	--aipc-text: #0f172a;
	--aipc-text-light: #64748b;
	--aipc-border: #e2e8f0;
	--aipc-radius: 12px;
	--aipc-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

@media (prefers-color-scheme: dark) {
	:root {
		--aipc-bg: #1e293b;
		--aipc-bg-alt: #0f172a;
		--aipc-text: #f8fafc;
		--aipc-border: #334155;
	}
}

.aipc-wrapper,
.aipc-wrapper *,
.aipc-wrapper *::before,
.aipc-wrapper *::after {
	box-sizing: border-box;
}

.aipc-wrapper {
	max-width: 900px;
	margin: 2rem auto;
	font-family: system-ui, -apple-system, sans-serif;
	color: var(--aipc-text);
}

.aipc-card {
	background: var(--aipc-bg);
	border-radius: var(--aipc-radius);
	padding: 2rem;
	box-shadow: var(--aipc-shadow);
	border: 1px solid var(--aipc-border);
}

.aipc-title {
	margin-top: 0;
	font-size: 1.5rem;
	color: var(--aipc-primary);
	border-bottom: 2px solid var(--aipc-border);
	padding-bottom: 1rem;
	margin-bottom: 1.5rem;
}

.aipc-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 2rem;
}

.aipc-controls {
	display: flex;
	flex-direction: column;
}

.aipc-form-group {
	display: flex;
	flex-direction: column;
	align-items: stretch;
	text-align: left;
	margin-bottom: 1.2rem;
}

.aipc-form-group label {
	display: block;
	width: 100%;
	margin: 0 0 0.5rem 0;
	padding: 0;
	font-weight: 600;
	line-height: 1.3;
	text-align: left;
}

.aipc-input {
	display: block;
	width: 100%;
	min-height: 3rem;
	margin: 0;
	padding: 0.75rem 2.25rem 0.75rem 0.75rem;
	border: 1px solid var(--aipc-border);
	border-radius: 8px;
	background: var(--aipc-bg-alt);
	color: var(--aipc-text);
	font-family: inherit;
	font-size: 1rem;
	line-height: 1.4;
	vertical-align: middle;
	transition: border-color 0.2s;
	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;
}

select.aipc-input {
	background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 0.75rem center;
	background-size: 1rem;
}

input.aipc-input {
	line-height: 1.4;
}

.aipc-input:focus {
	outline: none;
	border-color: var(--aipc-primary);
	box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

.aipc-input.aipc-hidden {
	display: none !important;
}

input.aipc-input:not(.aipc-hidden) {
	margin-top: 0.5rem;
}

.aipc-visualizer {
	background: var(--aipc-bg-alt);
	border-radius: var(--aipc-radius);
	padding: 1.5rem;
	text-align: center;
	border: 1px solid var(--aipc-border);
}

.aipc-result-box {
	margin-bottom: 1.5rem;
}

.aipc-highlight {
	font-size: 2.5rem;
	font-weight: 700;
	color: var(--aipc-primary);
	line-height: 1;
}

.aipc-subtext {
	font-size: 1.1rem;
	color: var(--aipc-text-light);
	margin-top: 0.5rem;
}

.aipc-syringe-container {
	height: 300px;
	display: flex;
	justify-content: center;
}

.aipc-syringe-svg {
	height: 100%;
	width: auto;
}

#aipc-fluid {
	transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1), y 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.aipc-guide {
	margin-top: 2rem;
	padding-top: 1.5rem;
	border-top: 1px solid var(--aipc-border);
}

.aipc-equation {
	background: var(--aipc-bg-alt);
	padding: 1rem;
	border-radius: 8px;
	font-size: 1.1rem;
	margin-bottom: 1rem;
	text-align: center;
}

.aipc-steps {
	padding-left: 1.2rem;
}

.aipc-steps li {
	margin-bottom: 0.75rem;
	font-size: 1.05rem;
}

.aipc-actions {
	display: flex;
	gap: 1rem;
	margin-top: 2rem;
}

.aipc-btn {
	flex: 1;
	padding: 0.75rem;
	border: none;
	border-radius: 8px;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.2s;
	background: var(--aipc-primary);
	color: white;
}

.aipc-btn:hover {
	background: var(--aipc-primary-hover);
}

/* Print portal: hidden on screen, only shown during print */
#aipc-print-portal {
	display: none;
}

/* Print Styles for PDF Generation */
@media print {
	@page {
		margin: 1.5cm;
	}

	html, body {
		height: auto !important;
		overflow: visible !important;
		background: #fff !important;
		margin: 0 !important;
		padding: 0 !important;
	}

	/* Remove the entire real page from layout (not just from view) so no
	   blank space or blank pages are left behind by hidden theme markup. */
	body > *:not(#aipc-print-portal) {
		display: none !important;
	}

	#aipc-print-portal {
		display: block !important;
	}

	#aipc-print-portal .aipc-wrapper {
		max-width: 100%;
		margin: 0;
	}

	#aipc-print-portal .aipc-card {
		box-shadow: none;
		border: none;
		padding: 0;
	}

	#aipc-print-portal .aipc-actions {
		display: none !important;
	}

	/* Stack into a single compact column for print instead of the
	   two-column screen grid - keeps total page height predictable and
	   avoids forcing the whole card onto its own oversized page. */
	#aipc-print-portal .aipc-grid {
		display: block;
	}

	#aipc-print-portal .aipc-visualizer {
		margin-top: 1rem;
	}

	#aipc-print-portal .aipc-syringe-container {
		height: auto;
		max-height: 140px;
	}

	#aipc-print-portal .aipc-syringe-svg {
		height: 140px;
		width: auto;
	}

	/* Only protect small individual pieces from splitting mid-item -
	   never the whole card, which is what was producing blank pages. */
	#aipc-print-portal .aipc-form-group,
	#aipc-print-portal .aipc-result-box,
	#aipc-print-portal .aipc-steps li {
		break-inside: avoid;
		page-break-inside: avoid;
	}

	/* Plain, reliably-printable stand-in for the live <select>/<input>
	   controls, which are swapped out before printing (see calculator.js). */
	#aipc-print-portal .aipc-print-value {
		font-size: 1rem;
		font-weight: 600;
		color: #000;
		padding: 0.35rem 0;
		border-bottom: 1px solid #cbd5e1;
	}
}

/* Mobile Responsive */
@media (max-width: 768px) {
	.aipc-grid {
		grid-template-columns: 1fr;
	}
}