:root {
	/* Neutral “product” palette */
	--bg: #0b1020;
	--surface: rgba(255, 255, 255, 0.06);
	--border: rgba(255, 255, 255, 0.1);
	--text: rgba(255, 255, 255, 0.92);
	--muted: rgba(255, 255, 255, 0.6);

	--accent: #3b82f6;
	--ok: #22c55e;
	--warn: #f59e0b;

	--radius-xl: 18px;
	--radius-lg: 14px;
}

* {
	box-sizing: border-box;
}

html,
body {
	height: 100%;
	margin: 0;
	background: radial-gradient(
		1200px 800px at 20% 0%,
		#121a35 0%,
		var(--bg) 55%,
		#070a14 100%
	);
	color: var(--text);
	font-family:
		system-ui,
		-apple-system,
		BlinkMacSystemFont,
		"Segoe UI",
		sans-serif;
}

.app {
	height: 100%;
	display: flex;
	flex-direction: column;
}

.appbar {
	display: flex;
	align-items: center;
	gap: 14px;
	padding: 12px 14px;
	border-bottom: 1px solid var(--border);
	background: rgba(10, 14, 28, 0.72);
	backdrop-filter: blur(10px);
}

.brand {
	display: flex;
	align-items: center;
	gap: 10px;
	min-width: 0;
}
.brand-text {
	display: flex;
	flex-direction: column;
	gap: 1px;
	min-width: 0;
}
.brand-title {
	font-weight: 700;
	font-size: 0.95rem;
	line-height: 1.1;
}
.brand-subtitle {
	font-size: 0.78rem;
	color: var(--muted);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.appbar-spacer {
	flex: 1;
}

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

.btn {
	border: 1px solid var(--border);
	background: rgba(255, 255, 255, 0.04);
	color: var(--text);
	border-radius: 999px;
	padding: 7px 12px;
	font-size: 0.82rem;
	cursor: pointer;
	transition:
		transform 0.05s ease,
		background 0.15s ease,
		border-color 0.15s ease;
	display: inline-flex;
	align-items: center;
	gap: 8px;
}

.btn:hover {
	background: rgba(255, 255, 255, 0.07);
	border-color: rgba(255, 255, 255, 0.16);
}
.btn:active {
	transform: translateY(1px);
}

.btn-primary {
	border-color: rgba(59, 130, 246, 0.45);
	background: rgba(59, 130, 246, 0.18);
}

.btn-primary:hover {
	background: rgba(59, 130, 246, 0.25);
	border-color: rgba(59, 130, 246, 0.55);
}

.btn-ghost {
	background: transparent;
}

.toggle {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 6px 10px;
	border-radius: 999px;
	border: 1px solid var(--border);
	background: rgba(255, 255, 255, 0.04);
	font-size: 0.82rem;
	color: var(--muted);
	user-select: none;
}

.toggle input {
	display: none;
}

.toggle-ui {
	width: 34px;
	height: 20px;
	border-radius: 999px;
	position: relative;
	background: rgba(255, 255, 255, 0.12);
	border: 1px solid rgba(255, 255, 255, 0.1);
	transition: background 0.15s ease;
}

.toggle-ui::after {
	content: "";
	position: absolute;
	top: 2px;
	left: 2px;
	width: 16px;
	height: 16px;
	border-radius: 999px;
	background: rgba(255, 255, 255, 0.86);
	transition: transform 0.15s ease;
}

.toggle input:checked + .toggle-ui {
	background: rgba(34, 197, 94, 0.18);
	border-color: rgba(34, 197, 94, 0.28);
}

.toggle input:checked + .toggle-ui::after {
	transform: translateX(14px);
	background: rgba(255, 255, 255, 0.95);
}

.toggle-label {
	color: var(--text);
	opacity: 0.85;
}

.workspace {
	flex: 1;
	min-height: 0;
	display: grid;
	grid-template-columns: 1fr 1fr 340px;
	gap: 12px;
	padding: 12px;
}

.workspace.no-side {
	grid-template-columns: 1fr 1fr;
}

.panel {
	min-width: 0;
	border: 1px solid var(--border);
	border-radius: var(--radius-xl);
	background: var(--surface);
	box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
	overflow: hidden;
	display: flex;
	flex-direction: column;
}

.panel-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	padding: 10px 12px;
	border-bottom: 1px solid rgba(255, 255, 255, 0.08);
	background: rgba(0, 0, 0, 0.2);
}

.panel-title {
	font-weight: 650;
	font-size: 0.86rem;
	letter-spacing: 0.01em;
}

.editor-wrap {
	flex: 1;
	min-height: 0;
	display: flex;
}

#md-input {
	font-family:
		ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
		"Courier New", monospace;
	font-size: 14px;
	line-height: 20px;
	padding: 12px;
	flex: 1;
	width: 100%;
	height: 100%;
}

#md-input {
	border: none;
	outline: none;
	resize: none;
	overflow: auto;
	background: transparent;
	white-space: pre-wrap;
	line-height: 1.5;
	color: var(--text-main);
}

#preview {
	flex: 1;
	width: 100%;
	min-height: 0;
	border: none;
	background: #ffffff;
}

.side {
	min-width: 0;
	border: 1px solid var(--border);
	border-radius: var(--radius-xl);
	background: rgba(255, 255, 255, 0.04);
	overflow: hidden;
	display: flex;
	flex-direction: column;
}

.side-hidden {
	display: none;
}

.side-head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 10px;
	padding: 10px 12px;
	border-bottom: 1px solid rgba(255, 255, 255, 0.08);
	background: rgba(0, 0, 0, 0.2);
}

.side-title {
	font-weight: 650;
	font-size: 0.86rem;
}

.icon-btn {
	border: 1px solid rgba(255, 255, 255, 0.12);
	background: rgba(255, 255, 255, 0.04);
	color: var(--text);
	border-radius: 10px;
	padding: 6px 8px;
	cursor: pointer;
}

.icon-btn:hover {
	background: rgba(255, 255, 255, 0.07);
}

.side-body {
	padding: 10px 12px;
	display: flex;
	flex-direction: column;
	gap: 10px;
	color: var(--muted);
	font-size: 0.84rem;
}

.accordion {
	border: 1px solid rgba(255, 255, 255, 0.08);
	border-radius: var(--radius-lg);
	background: rgba(0, 0, 0, 0.16);
	padding: 8px 10px;
}

.accordion summary {
	cursor: pointer;
	color: rgba(255, 255, 255, 0.88);
	font-weight: 600;
}

.steps,
.bullets {
	margin: 8px 0 0;
	padding-left: 18px;
}

.kv {
	display: grid;
	grid-template-columns: 90px 1fr;
	gap: 6px 10px;
	margin-top: 8px;
	font-size: 0.82rem;
}

.kv .k {
	color: rgba(255, 255, 255, 0.55);
}
.kv .v {
	color: rgba(255, 255, 255, 0.88);
	font-family: ui-monospace, monospace;
	font-size: 0.8rem;
}

.side-footer {
	margin-top: 6px;
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
}

.link {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	text-decoration: none;
	color: rgba(255, 255, 255, 0.88);
	border: 1px solid rgba(255, 255, 255, 0.1);
	background: rgba(255, 255, 255, 0.04);
	padding: 6px 10px;
	border-radius: 999px;
	font-size: 0.8rem;
}

.link:hover {
	background: rgba(255, 255, 255, 0.07);
}

.statusbar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 12px;
	padding: 10px 14px;
	border-top: 1px solid var(--border);
	background: rgba(10, 14, 28, 0.72);
	backdrop-filter: blur(10px);
	font-size: 0.82rem;
	color: var(--muted);
}

.status-left {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	min-width: 0;
}

.dot {
	width: 8px;
	height: 8px;
	border-radius: 999px;
	background: var(--ok);
}

.dot.busy {
	background: var(--warn);
	animation: pulse 1.1s ease-in-out infinite;
}

@keyframes pulse {
	0%,
	100% {
		opacity: 0.55;
	}
	50% {
		opacity: 1;
	}
}

.status-right {
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

@media (max-width: 1100px) {
	.workspace {
		grid-template-columns: 1fr;
	}
	.workspace.no-side {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 640px) {
	.toolbar {
		flex-wrap: wrap;
		justify-content: flex-end;
	}
	.brand-subtitle {
		display: none;
	}
}