:root {
	--bg: #1d1f21;
	--bg-soft: #26292c;
	--bg-input: #2f3337;
	--border: #3a3f44;
	--text: #e6e6e6;
	--text-dim: #9aa0a6;
	--accent: #c8302b;
	--accent-text: #fff;
	--danger-bg: #3a1f1f;
	--danger-border: #7a2b26;
	--danger-text: #ffb3ae;
	--preview-bg: #4b4f52;
	--shadow: 0 10px 30px rgba(0, 0, 0, .45);
}

html[data-theme='light'] {
	--bg: #f4f5f7;
	--bg-soft: #fff;
	--bg-input: #fff;
	--border: #d7dade;
	--text: #22262a;
	--text-dim: #6b7177;
	--accent: #c8302b;
	--accent-text: #fff;
	--danger-bg: #fdecea;
	--danger-border: #f2b5b1;
	--danger-text: #8b2019;
	--preview-bg: #9ea3a8;
	--shadow: 0 10px 30px rgba(0, 0, 0, .15);
}

* { box-sizing: border-box; }

html, body {
	height: 100%;
	margin: 0;
}

body {
	display: flex;
	flex-direction: column;
	background: var(--bg);
	color: var(--text);
	font: 13px/1.45 -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
	overflow: hidden;
}

/* ---------- top bar ---------- */

.topbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 6px 10px;
	padding: 8px 12px;
	background: var(--bg-soft);
	border-bottom: 1px solid var(--border);
	flex: none;
}

.brand {
	font-size: 15px;
	letter-spacing: .2px;
	margin-right: 4px;
	white-space: nowrap;
}

.brand b { font-weight: 700; }

.brand span {
	color: var(--text-dim);
	font-size: 12px;
	margin-left: 6px;
}

.group {
	display: flex;
	align-items: center;
	gap: 6px;
}

.spacer { flex: 1 1 auto; }

button, select {
	font: inherit;
	color: var(--text);
	background: var(--bg-input);
	border: 1px solid var(--border);
	border-radius: 5px;
	padding: 5px 10px;
	cursor: pointer;
}

button:hover, select:hover { border-color: var(--text-dim); }

button:active { transform: translateY(1px); }

button.primary {
	background: var(--accent);
	border-color: var(--accent);
	color: var(--accent-text);
	font-weight: 600;
}

button.primary:hover { filter: brightness(1.1); }

button.icon {
	padding: 5px 8px;
	line-height: 1;
}

button:disabled {
	opacity: .5;
	cursor: default;
}

select { padding-right: 6px; }

.check {
	display: flex;
	align-items: center;
	gap: 4px;
	color: var(--text-dim);
	cursor: pointer;
	user-select: none;
}

.badge {
	display: inline-block;
	min-width: 16px;
	margin-left: 6px;
	padding: 0 4px;
	border-radius: 8px;
	background: var(--accent);
	color: var(--accent-text);
	font-size: 11px;
	text-align: center;
}

.status {
	color: var(--text-dim);
	font-size: 12px;
	white-space: nowrap;
}

.status.bad { color: var(--danger-text); }

/* ---------- split ---------- */

#split {
	display: flex;
	flex: 1 1 auto;
	min-height: 0;
}

.pane {
	position: relative;
	min-width: 0;
	overflow: hidden;
}

#editorPane { flex: 0 0 50%; }

#previewPane {
	flex: 1 1 auto;
	background: var(--preview-bg);
}

#editor {
	position: absolute;
	inset: 0;
}

#divider {
	flex: none;
	width: 6px;
	cursor: col-resize;
	background: var(--border);
}

#divider:hover, #divider.dragging { background: var(--accent); }

#pdf {
	width: 100%;
	height: 100%;
	border: 0;
	display: block;
}

.placeholder {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	opacity: .7;
	pointer-events: none;
}

/* ---------- error ---------- */

.error {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	max-height: 45%;
	overflow: auto;
	padding: 10px 12px;
	background: var(--danger-bg);
	border-top: 1px solid var(--danger-border);
	color: var(--danger-text);
	font-family: 'SF Mono', Consolas, 'Liberation Mono', monospace;
	font-size: 12px;
	white-space: pre-wrap;
}

.error b {
	display: block;
	margin-bottom: 4px;
}

/* ---------- assets panel ---------- */

.panel {
	position: absolute;
	top: 52px;
	right: 12px;
	z-index: 20;
	width: 380px;
	max-width: calc(100vw - 24px);
	max-height: calc(100vh - 80px);
	overflow: auto;
	padding: 12px;
	background: var(--bg-soft);
	border: 1px solid var(--border);
	border-radius: 8px;
	box-shadow: var(--shadow);
}

.panel-head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 8px;
}

.panel-foot {
	display: flex;
	gap: 6px;
	margin-top: 10px;
}

.hint {
	margin: 8px 0;
	color: var(--text-dim);
	font-size: 12px;
}

.hint code {
	background: var(--bg-input);
	border: 1px solid var(--border);
	border-radius: 3px;
	padding: 0 3px;
	font-size: 11px;
	word-break: break-all;
}

.assets-list {
	list-style: none;
	margin: 0;
	padding: 0;
	max-height: 200px;
	overflow: auto;
}

.assets-list li {
	display: flex;
	align-items: center;
	gap: 8px;
	padding: 4px 0;
	border-bottom: 1px solid var(--border);
}

.assets-list .name {
	flex: 1 1 auto;
	font-family: 'SF Mono', Consolas, monospace;
	font-size: 12px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.assets-list .size {
	color: var(--text-dim);
	font-size: 11px;
}

.assets-list .empty {
	color: var(--text-dim);
	border: 0;
}

/* ---------- drag & drop ---------- */

.drop {
	position: fixed;
	inset: 0;
	z-index: 50;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(0, 0, 0, .55);
	color: #fff;
	font-size: 18px;
	pointer-events: none;
}

.drop div {
	padding: 24px 32px;
	border: 2px dashed rgba(255, 255, 255, .7);
	border-radius: 12px;
}

.hidden { display: none !important; }

/* ---------- narrow screens ---------- */

@media (max-width: 860px) {
	#split { flex-direction: column; }

	#editorPane { flex: 0 0 45%; }

	#divider {
		width: auto;
		height: 6px;
		cursor: row-resize;
	}
}