:root {
	--bg: #ffffff;
	--surface: #faf7fd;
	--surface-2: #f2eaf9;
	--text: #1d1828;
	--muted: #5d5670;
	--border: #e4daef;
	--accent: #8008e0;
	--accent-2: #e830c8;
	--accent-soft: #f6e8fd;
	--code-bg: #f6f2fa;
	--code-text: #2a2236;
	--warn: #9a5b00;
	--warn-bg: #fff4dc;
	--note-bg: #e9f1ff;
	--note: #1f4fa8;
	--gradient: linear-gradient(120deg, #8008e0, #e830c8);
	--sidebar-w: 270px;
	--content-w: 860px;
	color-scheme: light;
}

:root[data-theme="dark"] {
	--bg: #14101b;
	--surface: #1c1626;
	--surface-2: #271e36;
	--text: #efe9f7;
	--muted: #ab9fc3;
	--border: #35294b;
	--accent: #c76bff;
	--accent-2: #ff5fd8;
	--accent-soft: #2f1a44;
	--code-bg: #1e1829;
	--code-text: #e8e0f4;
	--warn: #e2a84a;
	--warn-bg: #33291a;
	--note-bg: #182338;
	--note: #8db4ff;
	color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
	:root:not([data-theme="light"]) {
		--bg: #14101b;
		--surface: #1c1626;
		--surface-2: #271e36;
		--text: #efe9f7;
		--muted: #ab9fc3;
		--border: #35294b;
		--accent: #c76bff;
		--accent-2: #ff5fd8;
		--accent-soft: #2f1a44;
		--code-bg: #1e1829;
		--code-text: #e8e0f4;
		--warn: #e2a84a;
		--warn-bg: #33291a;
		--note-bg: #182338;
		--note: #8db4ff;
		color-scheme: dark;
	}
}

* { box-sizing: border-box; }

::selection { background: var(--accent-soft); color: var(--text); }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
	position: sticky;
	top: 0;
	z-index: 20;
	display: flex;
	align-items: center;
	gap: 0.75rem;
	padding: 0.6rem 1rem;
	background: var(--bg);
	border-bottom: 1px solid var(--border);
}

/* a thin band in the colours of the logo under the bar */
.topbar::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -1px;
	height: 3px;
	background: var(--gradient);
}

.topbar .brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; color: var(--text); }
.topbar .brand:hover { text-decoration: none; }
.topbar .brand .logo { display: block; width: 28px; height: 28px; }
.topbar .brand .name { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.topbar .brand .sub { margin-left: -0.35rem; color: var(--muted); font-weight: 600; }
.topbar .spacer { flex: 1; }

.topbar button {
	background: var(--surface);
	color: var(--text);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 0.35rem 0.7rem;
	font: inherit;
	cursor: pointer;
}
.topbar button:hover { background: var(--surface-2); }
#menu-toggle { display: none; }

.layout {
	display: grid;
	grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
	max-width: calc(var(--sidebar-w) + var(--content-w) + 4rem);
	margin: 0 auto;
}

.sidebar {
	position: sticky;
	top: 3.4rem;
	align-self: start;
	height: calc(100vh - 3.4rem);
	overflow-y: auto;
	padding: 1.2rem 1rem 2rem;
	border-right: 1px solid var(--border);
}

.sidebar input[type="search"] {
	width: 100%;
	padding: 0.45rem 0.6rem;
	margin-bottom: 0.8rem;
	background: var(--surface);
	color: var(--text);
	border: 1px solid var(--border);
	border-radius: 8px;
	font: inherit;
}

.sidebar h4 {
	margin: 1rem 0 0.3rem;
	font-size: 0.72rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--muted);
}

.sidebar a {
	display: block;
	padding: 0.28rem 0.6rem;
	border-radius: 6px;
	color: var(--text);
}
.sidebar a:hover { background: var(--surface); text-decoration: none; }
.sidebar a.current { background: var(--accent-soft); color: var(--accent); font-weight: 600; box-shadow: inset 0 0 0 1.5px var(--accent-2); }
.sidebar a.hidden { display: none; }

main { padding: 1.5rem 2rem 4rem; min-width: 0; }

main h1 { font-size: 2rem; line-height: 1.25; margin: 0.2rem 0 0.4rem; }
main h1::after { content: ""; display: block; width: 3.4rem; height: 4px; margin-top: 0.5rem; border-radius: 2px; background: var(--gradient); }
main .lead { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
main h2 { margin-top: 2.4rem; padding-top: 0.4rem; border-top: 1px solid var(--border); font-size: 1.45rem; }
main h3 { margin-top: 1.8rem; font-size: 1.15rem; }
main h2 .anchor, main h3 .anchor { margin-left: 0.4rem; color: var(--muted); opacity: 0; font-weight: 400; }
main h2:hover .anchor, main h3:hover .anchor { opacity: 1; }

code, pre { font-family: ui-monospace, "Cascadia Code", "Fira Code", Consolas, monospace; font-size: 0.9em; }
code { background: var(--code-bg); color: var(--code-text); padding: 0.1em 0.35em; border-radius: 5px; }

pre {
	position: relative;
	margin: 1rem 0;
	padding: 0.9rem 1rem;
	overflow-x: auto;
	background: var(--code-bg);
	color: var(--code-text);
	border: 1px solid var(--border);
	border-radius: 10px;
	line-height: 1.5;
}
pre { tab-size: 4; }
pre code { background: none; padding: 0; color: inherit; }
pre .copy {
	position: absolute;
	top: 0.4rem;
	right: 0.4rem;
	padding: 0.15rem 0.5rem;
	font: 0.75rem system-ui, sans-serif;
	background: var(--surface);
	color: var(--muted);
	border: 1px solid var(--border);
	border-radius: 6px;
	cursor: pointer;
	opacity: 0;
}
pre:hover .copy { opacity: 1; }

table { border-collapse: collapse; display: block; max-width: 100%; overflow-x: auto; margin: 1rem 0; font-size: 0.95rem; }
td code, th code { overflow-wrap: anywhere; }
main p, main li { overflow-wrap: break-word; }
th, td { text-align: left; padding: 0.5rem 0.7rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface); }
.table-wrap { overflow-x: auto; }

.callout { margin: 1.2rem 0; padding: 0.8rem 1rem; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); }
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }
.callout.note { background: var(--note-bg); border-color: transparent; }
.callout.note strong.label { color: var(--note); }
.callout.warn { background: var(--warn-bg); border-color: transparent; }
.callout.warn strong.label { color: var(--warn); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 0.9rem; margin: 1.2rem 0; }
.card { display: block; padding: 0.9rem 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; color: var(--text); }
.card:hover { border-color: var(--accent-2); box-shadow: 0 0 0 1px var(--accent-2); text-decoration: none; }
.card strong { display: block; color: var(--accent); margin-bottom: 0.2rem; }
.card span { color: var(--muted); font-size: 0.92rem; }

footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }

@media (max-width: 900px) {
	.layout { display: block; }
	#menu-toggle { display: inline-block; }
	.sidebar {
		display: none;
		position: fixed;
		top: 3.1rem;
		left: 0;
		right: 0;
		height: auto;
		max-height: calc(100vh - 3.1rem);
		z-index: 15;
		background: var(--bg);
		border-right: none;
		border-bottom: 1px solid var(--border);
	}
	body.menu-open .sidebar { display: block; }
	main { padding: 1.2rem 1rem 3rem; }
	main h1 { font-size: 1.6rem; }
}