:root {
	--bg: #f0f2f5;
	--panel: #ffffff;
	--text: #1a1a1b;
	--accent: #3b82f6;
	--border: #d1d5db;
	--header: #ffffff;
}

[data-theme="dark"] {
	--bg: #0f172a;
	--panel: #1e293b;
	--text: #f8fafc;
	--accent: #60a5fa;
	--border: #334155;
	--header: #1e293b;
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

body {
	background-color: var(--bg);
	color: var(--text);
	font-family: "Inter", system-ui, sans-serif;
	height: 100vh;
}

.app-grid {
	display: grid;
	grid-template-rows: auto 1fr;
	height: 100vh;
}

.app-header {
	background: var(--header);
	padding: 1rem 2rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
	border-bottom: 1px solid var(--border);
	box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.global-controls {
	display: flex;
	gap: 1.5rem;
	align-items: center;
}

.control-group {
	display: flex;
	flex-direction: column;
	gap: 0.25rem;
}

.control-group label {
	font-size: 0.7rem;
	font-weight: 700;
	text-transform: uppercase;
	color: var(--accent);
}

select,
.btn {
	padding: 0.5rem 0.75rem;
	border-radius: 6px;
	border: 1px solid var(--border);
	background: var(--panel);
	color: var(--text);
	font-size: 0.9rem;
	cursor: pointer;
}

.primary {
	background: var(--accent);
	color: white;
	border: none;
}

.content {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 1rem;
	padding: 1rem;
	overflow: hidden;
}

.pane {
	background: var(--panel);
	border-radius: 12px;
	border: 1px solid var(--border);
	display: flex;
	flex-direction: column;
	overflow: hidden;
	position: relative;
}

.pane-label {
	padding: 0.5rem 1rem;
	font-size: 0.75rem;
	background: rgba(0, 0, 0, 0.03);
	border-bottom: 1px solid var(--border);
	font-weight: 600;
}

#editor {
	flex: 1;
	padding: 1.5rem;
	border: none;
	background: transparent;
	color: var(--text);
	font-family: "Fira Code", monospace;
	font-size: 14px;
	line-height: 1.6;
	outline: none;
	resize: none;
}

#viewer {
	flex: 1;
	padding: 1rem;
	overflow: auto;
	display: flex;
	justify-content: center;
	align-items: flex-start;
}

@media (max-width: 900px) {
	.content {
		grid-template-columns: 1fr;
		grid-template-rows: 1fr 1fr;
	}
	.app-header {
		flex-direction: column;
		gap: 1rem;
	}
}