/*
 * Colophon — design tokens & base system.
 *
 * Palette: leather-bound "reading room" — near-black iron-gall ink ground,
 * aged cream paper text, oxblood morocco-leather red, brass/gilt foil-
 * stamping gold. Two self-hosted families only (Colophon Display /
 * Colophon Text, both cuts of Libre Caslon — see fonts.css).
 *
 * Layout archetype: the "card catalogue" — editions and bindings browse in
 * a grid styled after a library card-catalogue drawer, with guide-tab
 * labels along each card's top edge, distinct from this catalogue's other
 * light-parchment "catalogue spread" (Patina/auction-house) archetype.
 *
 * @package Colophon
 */

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

:root {
	--cl-ink: #1a1512;
	--cl-ink-soft: #221b16;
	--cl-ink-elevated: #2a221b;
	--cl-paper: #f3e9d6;
	--cl-paper-dim: rgba(243, 233, 214, 0.72);
	--cl-paper-faint: rgba(243, 233, 214, 0.46);
	--cl-oxblood: #7d2a35;
	--cl-oxblood-bright: #a23947;
	--cl-brass: #b6903f;
	--cl-brass-bright: #dbb768;
	--cl-line: rgba(243, 233, 214, 0.14);
	--cl-line-strong: rgba(243, 233, 214, 0.24);
	--cl-glass-bg: rgba(34, 27, 22, 0.62);
	--cl-glass-border: rgba(243, 233, 214, 0.12);
	--cl-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);

	--cl-font-display: 'Colophon Display', Georgia, 'Times New Roman', serif;
	--cl-font-text: 'Colophon Text', Georgia, 'Times New Roman', serif;
	--cl-font-mono: ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;

	/* Type scale: base 17px x 1.25 (major third-ish), 7 sizes, reused everywhere. */
	--cl-size-0: 0.9375rem;  /* 15 */
	--cl-size-1: 1.0625rem;  /* 17 */
	--cl-size-2: 1.3125rem;  /* 21 */
	--cl-size-3: 1.6875rem;  /* 27 */
	--cl-size-4: 2.0625rem;  /* 33 */
	--cl-size-5: 2.625rem;   /* 42 */
	--cl-size-6: 3.25rem;    /* 52 */
	--cl-size-7: 4.0625rem;  /* 65 */

	/* Spacing scale: base 8px. */
	--cl-sp-1: 0.5rem;
	--cl-sp-2: 1rem;
	--cl-sp-3: 1.5rem;
	--cl-sp-4: 2rem;
	--cl-sp-5: 3rem;
	--cl-sp-6: 4rem;
	--cl-sp-7: 6rem;
	--cl-sp-8: 8rem;
	--cl-sp-9: 10rem;

	--cl-radius: 3px;
	--cl-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
	--cl-ease-in: cubic-bezier(0.7, 0, 0.84, 0);
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

html, body { overflow-x: hidden; }

body {
	margin: 0;
	background: var(--cl-ink);
	color: var(--cl-paper);
	font-family: var(--cl-font-text);
	font-size: var(--cl-size-1);
	line-height: 1.55;
	-webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }

h1, h2, h3, h4 {
	font-family: var(--cl-font-display);
	font-weight: 400;
	line-height: 1.12;
	letter-spacing: -0.01em;
	text-wrap: balance;
}

.h-display { font-size: var(--cl-size-7); }
.h-1 { font-size: var(--cl-size-6); }
.h-2 { font-size: var(--cl-size-5); }
.h-3 { font-size: var(--cl-size-4); }
.h-4 { font-size: var(--cl-size-3); }

@media (max-width: 720px) {
	.h-display { font-size: var(--cl-size-6); }
	.h-1 { font-size: var(--cl-size-5); }
	.h-2 { font-size: var(--cl-size-4); }
}

.eyebrow {
	font-family: var(--cl-font-text);
	font-size: var(--cl-size-0);
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--cl-brass-bright);
}

.lede {
	font-size: var(--cl-size-2);
	color: var(--cl-paper-dim);
	max-width: 62ch;
	line-height: 1.5;
}

.measure { max-width: 68ch; }

/* ---------- Skip link ---------- */
.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	background: var(--cl-oxblood);
	color: var(--cl-paper);
	padding: var(--cl-sp-2) var(--cl-sp-3);
	z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---------- Persistent GPU scene stage ----------
 * Painted before .colophon-page so an opaque body background can never
 * hide a fixed canvas behind it (a real bug class this catalogue has hit
 * before). Canvas fades in via .is-ready; the fallback gradient is the
 * default visible state and is what static-tier visitors see permanently.
 */
.colophon-scene-stage {
	position: fixed; inset: 0; z-index: 0; overflow: hidden; background: var(--cl-ink);
}
.colophon-scene-stage canvas {
	position: absolute; inset: 0; width: 100%; height: 100%; display: block;
	opacity: 0; transition: opacity 1.2s var(--cl-ease-out);
}
.colophon-scene-stage.is-ready canvas { opacity: 1; }
.colophon-scene-fallback {
	position: absolute; inset: 0;
	background:
		radial-gradient(ellipse 70% 55% at 50% 30%, rgba(125, 42, 53, 0.18), transparent 70%),
		radial-gradient(ellipse 60% 50% at 80% 80%, rgba(182, 144, 63, 0.10), transparent 70%),
		var(--cl-ink);
}
.colophon-scene-stage.is-ready .colophon-scene-fallback { display: none; }

.colophon-page { position: relative; z-index: 1; }

/* ---------- Glass utility ---------- */
.glass {
	background: var(--cl-glass-bg);
	backdrop-filter: blur(18px) saturate(1.1);
	-webkit-backdrop-filter: blur(18px) saturate(1.1);
	border: 1px solid var(--cl-glass-border);
	border-radius: var(--cl-radius);
}

/* ---------- Layout ---------- */
.wrap { max-width: 1280px; margin: 0 auto; padding: 0 var(--cl-sp-4); }
@media (max-width: 720px) { .wrap { padding: 0 var(--cl-sp-3); } }

.section { padding: var(--cl-sp-8) 0; }
@media (max-width: 900px) { .section { padding: var(--cl-sp-6) 0; } }

.section-head { max-width: 46rem; margin-bottom: var(--cl-sp-5); }
.section-head + .section-head { margin-top: var(--cl-sp-5); }

.btn {
	display: inline-flex; align-items: center; gap: var(--cl-sp-1);
	padding: 0.85em 1.6em;
	font-family: var(--cl-font-text); font-size: var(--cl-size-1);
	border-radius: var(--cl-radius);
	transition: transform 0.35s var(--cl-ease-out), background 0.35s, border-color 0.35s, color 0.35s;
}
.btn-primary {
	background: var(--cl-oxblood); color: var(--cl-paper); border: 1px solid var(--cl-oxblood-bright);
}
.btn-primary:hover { background: var(--cl-oxblood-bright); transform: translateY(-2px); }
.btn-ghost {
	border: 1px solid var(--cl-line-strong); color: var(--cl-paper);
}
.btn-ghost:hover { border-color: var(--cl-brass-bright); color: var(--cl-brass-bright); transform: translateY(-2px); }
.btn-brass {
	background: var(--cl-brass); color: var(--cl-ink); border: 1px solid var(--cl-brass-bright); font-weight: 700;
}
.btn-brass:hover { background: var(--cl-brass-bright); transform: translateY(-2px); }

/* ---------- Header / nav ---------- */
.site-header {
	position: sticky; top: 0; z-index: 100;
	border-bottom: 1px solid var(--cl-line);
	background: var(--cl-glass-bg);
	backdrop-filter: blur(14px) saturate(1.1);
	-webkit-backdrop-filter: blur(14px) saturate(1.1);
}
.site-header__inner {
	display: flex; align-items: center; justify-content: space-between;
	padding: var(--cl-sp-2) 0;
}
.brand { display: flex; align-items: center; gap: 0.6rem; font-family: var(--cl-font-display); font-size: var(--cl-size-3); color: var(--cl-paper); }
.brand__mark { color: var(--cl-brass-bright); }
.brand small { display: block; font-family: var(--cl-font-text); font-size: 0.62em; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cl-paper-faint); }

.nav-toggle { display: none; }
.nav__close { display: none; }

.nav { display: flex; align-items: center; gap: var(--cl-sp-4); }
.nav__links { display: flex; align-items: center; gap: var(--cl-sp-3); }
.nav a:not(.btn) {
	position: relative; padding: 0.3em 0; font-size: var(--cl-size-0); letter-spacing: 0.03em;
}
.nav a:not(.btn)::after {
	content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px;
	background: var(--cl-brass-bright); transform: scaleX(0); transform-origin: left;
	transition: transform 0.3s var(--cl-ease-out);
}
.nav a:not(.btn):hover::after, .nav a:not(.btn).is-active::after { transform: scaleX(1); }
.nav__cta { margin-left: 0.3rem; }

@media (max-width: 900px) {
	.nav-toggle {
		display: inline-flex; align-items: center; justify-content: center;
		width: 40px; height: 40px; border: 1px solid var(--cl-line-strong); border-radius: var(--cl-radius);
	}
	.nav {
		position: fixed; inset: 0 0 0 30%; z-index: 150;
		flex-direction: column; align-items: flex-start; justify-content: flex-start;
		padding: var(--cl-sp-6) var(--cl-sp-4);
		background: var(--cl-ink-soft); border-left: 1px solid var(--cl-line);
		transform: translateX(100%); transition: transform 0.4s var(--cl-ease-out);
	}
	.nav.is-open { transform: translateX(0); }
	.nav__links { flex-direction: column; align-items: flex-start; gap: var(--cl-sp-3); width: 100%; }
	.nav__cta { margin-left: 0; margin-top: var(--cl-sp-3); }
	.nav__close { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; position: absolute; top: var(--cl-sp-3); right: var(--cl-sp-3); }
}

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--cl-line); padding: var(--cl-sp-7) 0 var(--cl-sp-4); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--cl-sp-5); }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h4 { font-family: var(--cl-font-text); font-size: var(--cl-size-0); letter-spacing: 0.1em; text-transform: uppercase; color: var(--cl-brass-bright); margin-bottom: var(--cl-sp-2); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a:hover { color: var(--cl-brass-bright); }
.footer-bottom {
	margin-top: var(--cl-sp-6); padding-top: var(--cl-sp-3); border-top: 1px solid var(--cl-line);
	display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--cl-sp-2);
	font-size: var(--cl-size-0); color: var(--cl-paper-faint);
}
.social-row { display: flex; gap: var(--cl-sp-2); }
.social-row a { color: var(--cl-paper-dim); }
.social-row a:hover { color: var(--cl-brass-bright); }

/* ---------- Hero ---------- */
.hero { min-height: 92vh; display: flex; align-items: center; padding: var(--cl-sp-7) 0; }
.hero__inner { max-width: 42rem; }
.hero__panel {
	padding: var(--cl-sp-5); border-radius: var(--cl-radius);
}
.hero__title { margin: var(--cl-sp-2) 0 var(--cl-sp-3); white-space: pre-line; }
.hero__actions { display: flex; gap: var(--cl-sp-2); margin-top: var(--cl-sp-4); flex-wrap: wrap; }
.hero__scroll-cue {
	position: absolute; left: 1.5rem; bottom: 2rem;
	writing-mode: vertical-rl; font-size: var(--cl-size-0); letter-spacing: 0.14em; text-transform: uppercase;
	color: var(--cl-paper-faint); display: flex; align-items: center; gap: 0.6rem;
}
.hero__scroll-cue::after { content: ''; width: 1px; height: 40px; background: var(--cl-line-strong); }

/* ---------- Reveal-on-scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--cl-ease-out), transform 0.7s var(--cl-ease-out); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { transition-delay: calc(var(--i, 0) * 80ms); }

/* ---------- Stat grid ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--cl-sp-4); }
@media (max-width: 800px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
.stat { padding: var(--cl-sp-3) 0; border-top: 1px solid var(--cl-line); }
.stat__value { font-family: var(--cl-font-display); font-size: var(--cl-size-5); color: var(--cl-brass-bright); }
.stat__label { font-size: var(--cl-size-0); color: var(--cl-paper-faint); margin-top: 0.3rem; }

/* ---------- Card catalogue grid (editions/bindings) ----------
 * Signature layout archetype: each card is styled after a library card-
 * catalogue drawer entry, with a guide-tab label along its top edge.
 */
.catalogue-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--cl-sp-4); }
@media (max-width: 980px) { .catalogue-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .catalogue-grid { grid-template-columns: 1fr; } }

.catalogue-card {
	position: relative; display: block; border: 1px solid var(--cl-line);
	background: var(--cl-ink-soft); border-radius: var(--cl-radius); overflow: hidden;
	transition: transform 0.4s var(--cl-ease-out), border-color 0.4s;
}
.catalogue-card:hover { transform: translateY(-4px); border-color: var(--cl-line-strong); }
.catalogue-card__tab {
	position: absolute; top: 0; left: var(--cl-sp-3);
	background: var(--cl-brass); color: var(--cl-ink);
	font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700;
	padding: 0.3em 0.9em; border-radius: 0 0 4px 4px;
	z-index: 2;
}
.catalogue-card__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--cl-ink); }
.catalogue-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--cl-ease-out); }
.catalogue-card:hover .catalogue-card__media img { transform: scale(1.05); }
.catalogue-card__body { padding: var(--cl-sp-3); }
.catalogue-card__title { font-family: var(--cl-font-display); font-size: var(--cl-size-3); margin-bottom: 0.3rem; }
.catalogue-card__meta { font-size: var(--cl-size-0); color: var(--cl-paper-faint); display: flex; flex-wrap: wrap; gap: 0.3em 0.8em; margin-bottom: 0.6rem; }
.catalogue-card__collation {
	font-family: var(--cl-font-mono); font-size: 0.78rem; color: var(--cl-brass-bright);
	border-top: 1px dashed var(--cl-line-strong); margin-top: 0.6rem; padding-top: 0.6rem;
}
.catalogue-card__price { font-family: var(--cl-font-display); font-size: var(--cl-size-2); color: var(--cl-paper); margin-top: 0.6rem; }

/* ---------- Filter rail ---------- */
.filter-rail { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: var(--cl-sp-4); }
.filter-chip {
	padding: 0.5em 1.1em; font-size: var(--cl-size-0); border: 1px solid var(--cl-line-strong); border-radius: 999px;
	transition: background 0.3s, border-color 0.3s, color 0.3s;
}
.filter-chip.is-active, .filter-chip:hover { background: var(--cl-oxblood); border-color: var(--cl-oxblood-bright); color: var(--cl-paper); }

/* ---------- Process list ---------- */
.process-list { counter-reset: step; display: flex; flex-direction: column; }
.process-step {
	display: grid; grid-template-columns: 4rem 1fr; gap: var(--cl-sp-3);
	padding: var(--cl-sp-4) 0; border-top: 1px solid var(--cl-line);
}
.process-step:last-child { border-bottom: 1px solid var(--cl-line); }
.process-step__num {
	counter-increment: step; font-family: var(--cl-font-display); font-size: var(--cl-size-4); color: var(--cl-brass-bright);
}
.process-step__num::before { content: counter(step, decimal-leading-zero); }

/* ---------- Testimonial ---------- */
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--cl-sp-4); }
@media (max-width: 900px) { .testimonial-grid { grid-template-columns: 1fr; } }
.testimonial { padding: var(--cl-sp-4); border: 1px solid var(--cl-line); border-radius: var(--cl-radius); }
.testimonial__quote { font-family: var(--cl-font-display); font-size: var(--cl-size-2); line-height: 1.4; }
.testimonial__author { margin-top: var(--cl-sp-2); font-size: var(--cl-size-0); color: var(--cl-paper-faint); }

/* ---------- Widget shells (signature techniques) ---------- */
.widget-panel {
	border: 1px solid var(--cl-line); border-radius: var(--cl-radius); padding: var(--cl-sp-4);
	background: var(--cl-ink-soft);
}
.widget-panel h3 { margin-bottom: var(--cl-sp-2); }
.widget-controls { display: flex; flex-wrap: wrap; gap: var(--cl-sp-3); margin: var(--cl-sp-3) 0; }
.widget-field { display: flex; flex-direction: column; gap: 0.35rem; font-size: var(--cl-size-0); color: var(--cl-paper-dim); }
.widget-field input[type="range"] { width: 220px; accent-color: var(--cl-brass); }
.widget-field select, .widget-field input[type="text"], .widget-field textarea {
	background: var(--cl-ink); border: 1px solid var(--cl-line-strong); color: var(--cl-paper);
	padding: 0.5em 0.8em; border-radius: var(--cl-radius); font-family: var(--cl-font-text);
}
.widget-output {
	font-family: var(--cl-font-mono); font-size: 0.85rem; color: var(--cl-brass-bright);
	background: rgba(0,0,0,0.25); border-radius: var(--cl-radius); padding: var(--cl-sp-2);
}

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--cl-sp-3); }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-field.span-2 { grid-column: 1 / -1; }
.form-field label { font-size: var(--cl-size-0); color: var(--cl-paper-dim); }
.form-field input, .form-field select, .form-field textarea {
	background: var(--cl-ink); border: 1px solid var(--cl-line-strong); color: var(--cl-paper);
	padding: 0.7em 0.9em; border-radius: var(--cl-radius); font-family: var(--cl-font-text); font-size: var(--cl-size-1);
	transition: border-color 0.3s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: none; border-color: var(--cl-brass); }
.form-honeypot { position: absolute; left: -9999px; }
.form-status { margin-top: var(--cl-sp-2); font-size: var(--cl-size-0); }
.form-status.is-error { color: #e08a8a; }
.form-status.is-success { color: var(--cl-brass-bright); }

/* ---------- Inner page hero ---------- */
.page-hero { padding: var(--cl-sp-7) 0 var(--cl-sp-4); }
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; font-size: var(--cl-size-0); color: var(--cl-paper-faint); margin-bottom: var(--cl-sp-3); }
.back-link:hover { color: var(--cl-brass-bright); }
.section--narrow .wrap { max-width: 800px; }
.content-body { font-size: var(--cl-size-1); line-height: 1.7; }
.content-body p { margin-bottom: 1.2em; }
.content-body h2, .content-body h3 { margin: 1.6em 0 0.6em; }
.content-body a { color: var(--cl-brass-bright); text-decoration: underline; text-underline-offset: 3px; }
.content-body img { border-radius: var(--cl-radius); margin: 1.5em 0; }

/* ---------- Post list (index/search) ---------- */
.post-list { display: flex; flex-direction: column; gap: var(--cl-sp-4); }
.post-row { display: grid; grid-template-columns: 1fr; gap: 0.4rem; padding: var(--cl-sp-4) 0; border-top: 1px solid var(--cl-line); }
.post-row__title { font-family: var(--cl-font-display); font-size: var(--cl-size-3); }
.post-row__meta { font-size: var(--cl-size-0); color: var(--cl-paper-faint); }
.pagination { display: flex; gap: var(--cl-sp-2); margin-top: var(--cl-sp-5); }
.pagination a, .pagination span { padding: 0.5em 1em; border: 1px solid var(--cl-line-strong); border-radius: var(--cl-radius); font-size: var(--cl-size-0); }

/* ---------- Search form ---------- */
.search-form { display: flex; gap: 0.6rem; max-width: 30rem; }
.search-form input[type="search"] {
	flex: 1; background: var(--cl-ink); border: 1px solid var(--cl-line-strong); color: var(--cl-paper);
	padding: 0.7em 0.9em; border-radius: var(--cl-radius); font-family: var(--cl-font-text);
}

/* ---------- 404 / search ---------- */
.error-page { min-height: 60vh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }

/* ---------- Comments ---------- */
.comment-list { display: flex; flex-direction: column; gap: var(--cl-sp-3); }
.comment-body { padding: var(--cl-sp-3); border: 1px solid var(--cl-line); border-radius: var(--cl-radius); }
.comment-meta { font-size: var(--cl-size-0); color: var(--cl-paper-faint); margin-bottom: 0.4rem; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.sr-only {
	position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}