:root {
	--bg: #f6f6f4;
	--card: #ffffff;
	--text: #1c1c1a;
	--muted: #6b6b66;
	--border: #e2e2dc;
	--accent: #b3122e;
	--accent-text: #ffffff;
	--ok: #15803d;
	--err: #b42318;
	--code-bg: #f1f1ee;
	color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #141413;
		--card: #1e1e1c;
		--text: #ecece8;
		--muted: #a0a09a;
		--border: #33332f;
		--accent: #e5484d;
		--accent-text: #ffffff;
		--ok: #4ade80;
		--err: #f87171;
		--code-bg: #262624;
	}
}

* { box-sizing: border-box; }

body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header, main, footer {
	max-width: 980px;
	margin: 0 auto;
	padding: 0 16px;
}

header { padding-top: 40px; padding-bottom: 8px; }

h1 {
	display: flex;
	align-items: center;
	gap: 12px;
	margin: 0;
	font-size: 2.2rem;
	letter-spacing: 0.04em;
}

.logo {
	width: 36px;
	height: 36px;
	background: conic-gradient(#ff0000 0 25%, #0000ff 0 50%, #00ff00 0 75%, #000 0);
	border: 3px solid #fff;
	outline: 1px solid var(--border);
}

.tagline { color: var(--muted); margin: 8px 0 0; max-width: 60ch; }

h2 { margin: 0 0 12px; font-size: 1.3rem; }

.card {
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 12px;
	padding: 20px;
	margin: 20px 0;
}

label { font-weight: 600; font-size: 0.95rem; }

textarea {
	display: block;
	width: 100%;
	margin: 6px 0 12px;
	padding: 10px 12px;
	font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
	color: var(--text);
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: 8px;
	resize: vertical;
}

select {
	margin-left: 8px;
	padding: 6px 8px;
	font: inherit;
	color: var(--text);
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: 6px;
}

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.bytes { color: var(--muted); font-size: 0.9rem; }
.hint { color: var(--muted); font-size: 0.92rem; }

button, .button {
	display: inline-block;
	padding: 10px 18px;
	font: 600 15px/1 system-ui, sans-serif;
	color: var(--accent-text);
	background: var(--accent);
	border: 1px solid var(--accent);
	border-radius: 8px;
	cursor: pointer;
	text-decoration: none;
}
button.secondary, .button.secondary {
	color: var(--text);
	background: transparent;
	border-color: var(--border);
}
button.small, .button.small { padding: 6px 12px; font-size: 13px; }
button:hover, .button:hover { filter: brightness(1.08); }

.variants {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 16px;
	margin-top: 16px;
}

.variant {
	margin: 0;
	padding: 12px;
	border: 1px solid var(--border);
	border-radius: 10px;
	display: flex;
	flex-direction: column;
	gap: 10px;
}

/* Every variant is shown at the same width, so square size is comparable. */
.code { background: #fff; border-radius: 4px; line-height: 0; }
.code svg { width: 100%; height: auto; image-rendering: pixelated; }

figcaption { display: flex; flex-direction: column; gap: 2px; font-size: 0.9rem; }
figcaption span { color: var(--muted); }
figcaption .gain { color: var(--ok); font-weight: 600; }
figcaption .gain.muted { color: var(--muted); font-weight: 400; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }

.error { color: var(--err); }

#camera { margin-top: 16px; }

.viewport {
	position: relative;
	max-width: 640px;
	border-radius: 10px;
	overflow: hidden;
	background: #000;
}
.viewport video, .viewport canvas { display: block; width: 100%; height: auto; }
.viewport canvas { position: absolute; inset: 0; height: 100%; pointer-events: none; }

.layers { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.chip {
	padding: 4px 10px;
	border-radius: 999px;
	border: 1px solid var(--border);
	font-size: 0.85rem;
	color: var(--muted);
}
.chip small { opacity: 0.8; }
.chip.ok { color: var(--text); font-weight: 600; }
.chip.ok.ch-R { border-color: #ff0000; }
.chip.ok.ch-G { border-color: #00c000; }
.chip.ok.ch-B { border-color: #3b5bff; }
.chip.tentative { opacity: 0.55; border-style: dashed; }

.result {
	margin-top: 16px;
	padding: 14px;
	border: 1px solid var(--border);
	border-radius: 10px;
}
.result-kind { margin: 0 0 8px; color: var(--ok); font-weight: 600; }
.result pre {
	margin: 0;
	padding: 10px;
	white-space: pre-wrap;
	word-break: break-word;
	background: var(--code-bg);
	border-radius: 6px;
	font-size: 14px;
}

.how p { max-width: 70ch; }

.legend {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
	gap: 8px;
	margin: 12px 0;
	font-size: 0.88rem;
}
.swatch { display: flex; align-items: center; gap: 8px; }
.swatch span {
	width: 22px;
	height: 22px;
	border: 1px solid var(--border);
	flex: none;
}

a { color: var(--accent); }

footer { padding-bottom: 40px; color: var(--muted); font-size: 0.9rem; }