:root {
	--bg: #f6f8fa;
	--accent: #0366d6;
}

* {
	box-sizing: border-box;
}

html, body {
	height: 100%;
	margin: 0;
	font-family: Arial, Helvetica, sans-serif;
	background: var(--bg);
	color: #111;
}

header {
	padding: 16px 20px;
	border-bottom: 1px solid #e6eef8;
	background: #fff;
}

.author {
	display: flex;
	gap: 10px;
	align-items: center;
}

.author input {
	padding: 6px;
	border: 1px solid #ccc;
	border-radius: 6px;
}

.inf3 {
	font-weight: 700;
	color: var(--accent);
}

main {
	max-width: 1000px;
	margin: 18px auto;
	display: flex;
	gap: 16px;
	padding: 12px;
}

.left, .right {
	flex: 1;
}

textarea {
	width: 100%;
	min-height: 140px;
	padding: 10px;
	border: 1px solid #ccc;
	border-radius: 6px;
	background: #fff;
}

.controls {
	display: flex;
	gap: 8px;
	align-items: center;
	margin-top: 8px;
}

select, button {
	padding: 8px;
	border-radius: 6px;
	border: 0;
	background: var(--accent);
	color: #fff;
	cursor: pointer;
}

button[title] {
	background: #888;
}

.panel {
	background: #fff;
	padding: 12px;
	border-radius: 8px;
	border: 1px solid #e9f0fa;
}

.output {
	white-space: pre-wrap;
	max-height: 360px;
	overflow: auto;
	padding: 8px;
	background: #fbfdff;
	border-radius: 6px;
}

.huffman {
	font-family: monospace;
}

footer {
	padding: 10px;
	text-align: center;
	color: #666;
	font-size: 13px;
}

@media (max-width: 760px) {
	main {
		flex-direction: column;
		padding: 10px;
	}

	.author {
		flex-direction: column;
		align-items: flex-start;
	}
}