:root {
	--primary-color: #f6821f;
	--primary-hover: #e67e22;
	--light-bg: #f9fafb;
	--border-color: #e5e7eb;
	--text-color: #1f2937;
	--text-light: #6b7280;
	--user-msg-bg: #fff2e6;
	--assistant-msg-bg: #f3f4f6;
}
* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
body {
	font-family:
		-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
		Cantarell, sans-serif;
	line-height: 1.6;
	color: var(--text-color);
	max-width: 800px;
	margin: 0 auto;
	padding: 1rem;
}
header {
	text-align: center;
	margin-bottom: 2rem;
	padding: 1rem 0;
	border-bottom: 1px solid var(--border-color);
}
h1 {
	font-size: 1.5rem;
	color: var(--primary-color);
}