export const CSS = String.raw`
:root {
	color-scheme: dark;
	--bg: #14161c;
	--panel: #1d2029;
	--text: #eef0f5;
	--muted: #9aa1b2;
	--accent: #f2b544;
	--part: #5cc8a8;
	--white: #f7f6f2;
	--white-down: #d9e8ff;
	--black: #1b1c20;
	--black-down: #3b5a8a;
}
* { box-sizing: border-box; }
html, body {
	margin: 0;
	height: 100%;
	overflow: hidden;
	overscroll-behavior: none;
	touch-action: none;
	-webkit-tap-highlight-color: transparent;
	-webkit-user-select: none;
	user-select: none;
	-webkit-touch-callout: none;
}
body {
	position: fixed;
	inset: 0;
	display: flex;
	flex-direction: column;
	background: var(--bg);
	color: var(--text);
	font: 15px/1.2 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
	padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px;
	padding: 8px 10px;
	background: var(--panel);
}
button {
	font: inherit;
	color: var(--text);
	background: #2a2e3a;
	border: 1px solid #3a3f4e;
	border-radius: 10px;
	min-height: 44px;
	min-width: 44px;
	padding: 0 12px;
	touch-action: manipulation;
	cursor: pointer;
}
button:active { background: #353b4b; }
button[hidden] { display: none; }
#range { min-width: 96px; font-weight: 600; }
#range.home { background: transparent; border-color: transparent; }
#readout {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	min-width: 84px;
	background: #22262f;
	line-height: 1.05;
}
#readout-note { font-size: 22px; font-weight: 800; color: var(--accent); }
#readout-hz { font-size: 11px; color: var(--muted); }
#readout:not(.has-note) #readout-note { font-size: 13px; color: var(--muted); font-weight: 500; }
#sustain[aria-pressed='true'] { background: var(--accent); color: #1a1a1a; border-color: var(--accent); font-weight: 700; }
#install { background: var(--part); color: #10231d; border-color: var(--part); font-weight: 700; }
.spacer { flex: 1 1 0; min-width: 0; }
/* Small About link: its own 44px tap target in the header, never over the keys. */
.info {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	border-radius: 50%;
	color: var(--muted);
	text-decoration: none;
	touch-action: manipulation;
}
.info:active { background: #2a2e3a; color: var(--text); }

#keyboard {
	flex: 1;
	min-height: 0;
	display: flex;
	flex-direction: column;
	gap: 10px;
	margin: 6px;
	touch-action: none;
}
.row {
	position: relative;
	flex: 1;
	min-height: 0;
	overflow: hidden;
	border-radius: 6px;
}
.strip {
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: calc(var(--n, 52) * var(--k, 60px));
	will-change: transform;
}
.key { position: absolute; touch-action: none; }

/* Low notes on the left in every orientation. */
.key.white {
	top: 0;
	bottom: 0;
	left: calc(var(--i) * var(--k) + 1.5px);
	width: calc(var(--k) - 3px);
	background: linear-gradient(to bottom, #e9e7e1, var(--white) 12%);
	border-radius: 0 0 8px 8px;
	box-shadow: inset 0 -6px 0 #d5d2c9;
}
.key.black {
	top: 0;
	height: 58%;
	left: calc(var(--c) * var(--k) - var(--k) * 0.31);
	width: calc(var(--k) * 0.62);
	z-index: 2;
	background: linear-gradient(to bottom, #2c2e35, var(--black));
	border-radius: 0 0 6px 6px;
	box-shadow: inset 0 -5px 0 #000, 0 2px 4px rgba(0, 0, 0, 0.5);
}
.key.white.down { background: var(--white-down); box-shadow: inset 0 -2px 0 #b8c9e6; }
.key.black.down { background: var(--black-down); box-shadow: inset 0 -2px 0 #000; }
.key.in-part::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 5px;
	background: var(--part);
	opacity: 0.85;
}
.key.black.in-part::before { opacity: 0.6; }
.label {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 12px;
	text-align: center;
	font-size: 13px;
	font-weight: 600;
	color: #5a5d66;
	pointer-events: none;
}
.key.black .label { bottom: 8px; font-size: 10px; color: #a9adb8; }
.key.middle-c { background: linear-gradient(to bottom, #f6e2b3, #fff3d6 14%); box-shadow: inset 0 -6px 0 var(--accent); }
.key.middle-c.down { background: #ffe4a3; }
.key.middle-c .label { color: #9a5b00; font-weight: 800; }
.tag {
	position: absolute;
	left: 50%;
	bottom: 32px;
	transform: translateX(-50%);
	background: var(--accent);
	color: #1a1a1a;
	font-size: 9px;
	font-weight: 700;
	border-radius: 6px;
	padding: 2px 4px;
	white-space: nowrap;
	pointer-events: none;
}
@media (orientation: landscape) and (max-height: 500px) {
	header { padding: 4px 8px; gap: 6px; }
	button { min-height: 40px; }
	#keyboard { margin-top: 4px; }
}
@media (max-width: 380px) {
	.label { font-size: 11px; }
	.tag { font-size: 8px; }
}
`