/*
	Design system for kyleniemeyer.com — "bookish / letterpress".

	Deliberately different from the research group site, which uses
	Poppins + Nunito Sans, pure white, blue links, and a left sidebar.
	Here: a serif display face on warm paper, an oxblood accent, and a
	horizontal top nav.

	Nearly everything visual is a custom property in :root below, so the
	look can be retuned here without touching any Svelte component.
*/

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400..700;1,9..144,400..700&family=Inter:ital,wght@0,300..600;1,300..600&display=swap');

:root {
	/* Color — light */
	--paper: #fbf8f3; /* warm page background */
	--paper-raised: #ffffff; /* cards, insets */
	--paper-sunken: #f4efe6; /* quiet fills */
	--ink: #1f1b16; /* warm near-black body text */
	--ink-soft: #554e45; /* secondary text */
	--ink-faint: #8a8175; /* captions, metadata */
	--rule: #e3dcd0; /* hairlines and borders */
	--accent: #7b2d26; /* oxblood — links, marks */
	--accent-hover: #a03c33;
	--accent-soft: #f2e7e4; /* accent wash behind current nav item */

	/* Type */
	--font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
	--font-body: 'Inter', system-ui, -apple-system, sans-serif;

	--size-body: 1.0625rem;
	--size-small: 0.9375rem;
	--size-tiny: 0.8125rem;
	--size-lede: 1.3125rem;

	--weight-body: 400;
	--weight-bold: 600;
	--weight-display: 600;

	--leading-body: 1.65;
	--leading-display: 1.15;

	/* Layout */
	--measure: 44rem; /* comfortable line length for prose */
	--wide: 68rem; /* card grids and galleries */
	--gutter: 1.5rem;
	--step: 1.5rem; /* vertical rhythm unit */
	--radius: 3px; /* restrained — printed matter, not app chrome */
}

@media (prefers-color-scheme: dark) {
	:root {
		--paper: #16130f;
		--paper-raised: #1f1b16;
		--paper-sunken: #14110d;
		--ink: #efe9df;
		--ink-soft: #b3a996;
		--ink-faint: #7d7466;
		--rule: #2e2820;
		--accent: #d98b7f;
		--accent-hover: #eda69b;
		--accent-soft: #2a1d1a;
	}
	/*
		Note: no global img { opacity } dimming here. The research group site
		dims images in dark mode, but this site is photo-forward (books,
		woodworking) and dimming the photographs would defeat their purpose.
	*/
}

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	/* Anchored section headings shouldn't hide under the sticky nav. */
	scroll-padding-top: 5rem;
}

body {
	margin: 0;
	color: var(--ink);
	background-color: var(--paper);
	font-family: var(--font-body);
	font-size: var(--size-body);
	font-weight: var(--weight-body);
	line-height: var(--leading-body);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

/* --- Headings ------------------------------------------------------ */

h1,
h2,
h3,
h4 {
	font-family: var(--font-display);
	font-weight: var(--weight-display);
	line-height: var(--leading-display);
	letter-spacing: -0.01em;
	margin: calc(var(--step) * 1.75) 0 var(--step) 0;
	text-wrap: balance;
}

h1 {
	font-size: clamp(1.85rem, 1.3rem + 2.2vw, 2.75rem);
	/* Fraunces optical-size axis: larger optical size for display settings. */
	font-variation-settings: 'opsz' 100, 'SOFT' 20;
	margin-top: 0;
}

h2 {
	font-size: clamp(1.4rem, 1.15rem + 1vw, 1.75rem);
	font-variation-settings: 'opsz' 48;
}

h3 {
	font-size: 1.1875rem;
	font-variation-settings: 'opsz' 24;
}

h4 {
	font-size: 1.0625rem;
	font-variation-settings: 'opsz' 14;
}

p {
	margin: 0 0 var(--step) 0;
}

/* An opening paragraph, set larger. Use class="lede" on the first <p>. */
.lede {
	font-size: var(--size-lede);
	line-height: 1.5;
	color: var(--ink-soft);
}

/* --- Links --------------------------------------------------------- */

a {
	color: var(--accent);
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 0.18em;
	text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
	transition:
		color 0.12s ease,
		text-decoration-color 0.12s ease;
}

a:hover {
	color: var(--accent-hover);
	text-decoration-color: currentColor;
	cursor: pointer;
}

a:focus-visible,
button:focus-visible {
	outline: 2px solid var(--accent);
	outline-offset: 2px;
	border-radius: var(--radius);
}

b,
strong {
	font-weight: var(--weight-bold);
}

small {
	font-size: var(--size-small);
}

/* --- Lists --------------------------------------------------------- */

ul,
ol {
	margin: 0 0 var(--step) 0;
	padding-left: 1.25rem;
}

li {
	margin-bottom: 0.4rem;
}

li::marker {
	color: var(--ink-faint);
}

/* --- Rules, quotes, code ------------------------------------------- */

hr {
	border: none;
	border-top: 1px solid var(--rule);
	margin: calc(var(--step) * 2) 0;
}

blockquote {
	margin: var(--step) 0;
	padding-left: 1.25rem;
	border-left: 2px solid var(--rule);
	color: var(--ink-soft);
	font-style: italic;
}

code {
	font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: 0.9em;
	background-color: var(--paper-sunken);
	padding: 0.1em 0.35em;
	border-radius: var(--radius);
}

mark {
	color: var(--ink);
	background-color: var(--accent-soft);
	border-radius: var(--radius);
	padding: 0.1em 0.4em;
}

/* --- Images -------------------------------------------------------- */

img {
	max-width: 100%;
	height: auto;
	display: block;
}

/* --- Small caps label, used for section eyebrows ------------------- */

.eyebrow {
	font-family: var(--font-body);
	font-size: var(--size-tiny);
	font-weight: var(--weight-bold);
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--ink-faint);
	margin-bottom: 0.5rem;
}

/* --- Layout helpers ------------------------------------------------ */

.measure {
	max-width: var(--measure);
}

.wide {
	max-width: var(--wide);
}

/* Visually hidden but available to screen readers. */
.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}
}