/*
Theme Name: Book on Books
Theme URI: https://bookonbooks.com
Author: Book on Books
Description: Custom editorial theme for Book on Books — a curated library of book reviews by Joakim Book. Built to feel like a private library, not a blog or bookstore.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: book-on-books
*/

/* ==========================================================================
   1. Design Tokens
   ========================================================================== */

:root {
	--color-paper: #F7F3EC;
	--color-paper-dim: #EFE9DD;
	--color-ink: #1B1815;
	--color-ink-soft: #4A443C;
	--color-rule: #DCD4C4;
	--color-accent: #8A3B2E;

	--font-display: 'Fraunces', Georgia, serif;
	--font-body: 'Source Serif 4', Georgia, serif;
	--font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

	--space-1: 4px;
	--space-2: 8px;
	--space-3: 16px;
	--space-4: 24px;
	--space-5: 32px;
	--space-6: 48px;
	--space-7: 64px;
	--space-8: 96px;
	--space-9: 128px;
	--space-10: 192px;

	--measure: 68ch;
	--content-max: 1280px;
	--ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html { scroll-behavior: smooth; }

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

body {
	margin: 0;
	background: var(--color-paper);
	color: var(--color-ink);
	font-family: var(--font-body);
	font-size: 17px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}

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

a {
	color: var(--color-accent);
	text-decoration-thickness: 1px;
	text-underline-offset: 2px;
}

a:hover { text-decoration-thickness: 2px; }

:focus-visible {
	outline: 2px solid var(--color-accent);
	outline-offset: 3px;
}

h1, h2, h3 {
	font-family: var(--font-display);
	font-weight: 500;
	line-height: 1.15;
	margin: 0 0 var(--space-3);
	color: var(--color-ink);
}

h1 { font-size: clamp(2rem, 1.5rem + 2vw, 3.5rem); font-weight: 400; }
h2 { font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem); font-weight: 400; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1.4em; }

.u-visually-hidden {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden;
	clip: rect(0,0,0,0);
	white-space: nowrap;
	border: 0;
}

.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	background: var(--color-ink);
	color: var(--color-paper);
	padding: var(--space-2) var(--space-3);
	z-index: 1000;
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

/* ==========================================================================
   3. Layout containers
   ========================================================================== */

.container {
	max-width: var(--content-max);
	margin-inline: auto;
	padding-inline: var(--space-4);
}

@media (min-width: 900px) {
	.container { padding-inline: var(--space-7); }
}

.rhythm-section {
	padding-block: var(--space-8);
}

@media (min-width: 900px) {
	.rhythm-section { padding-block: var(--space-9); }
}

/* ==========================================================================
   4. Site Header
   ========================================================================== */

.site-header {
	border-bottom: 1px solid var(--color-rule);
	background: var(--color-paper);
	position: sticky;
	top: 0;
	z-index: 100;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-4);
	padding-block: var(--space-3);
}

.site-header__logo {
	font-family: var(--font-display);
	font-size: 1.5rem;
	font-weight: 500;
	color: var(--color-ink);
	text-decoration: none;
	white-space: nowrap;
}

.primary-nav { display: none; }

.primary-nav ul {
	list-style: none;
	display: flex;
	gap: var(--space-5);
	margin: 0;
	padding: 0;
}

.primary-nav a {
	font-family: var(--font-ui);
	font-size: 0.9375rem;
	font-weight: 500;
	color: var(--color-ink-soft);
	text-decoration: none;
}

.primary-nav a:hover,
.primary-nav a:focus-visible { color: var(--color-ink); }

@media (min-width: 780px) {
	.primary-nav { display: block; }
}

/* Search */

.site-search { position: relative; }

.site-search__input {
	font-family: var(--font-ui);
	font-size: 0.9375rem;
	border: 1px solid var(--color-rule);
	background: var(--color-paper-dim);
	border-radius: 6px;
	padding: var(--space-2) var(--space-3);
	width: 180px;
	max-width: 40vw;
	color: var(--color-ink);
	transition: width 300ms var(--ease-out), max-width 300ms var(--ease-out);
}

.site-search__input:focus {
	width: 280px;
	max-width: 60vw;
	outline: none;
	border-color: var(--color-accent);
}

.site-search__results {
	position: absolute;
	top: calc(100% + 8px);
	right: 0;
	width: 340px;
	max-width: 80vw;
	background: var(--color-paper);
	border: 1px solid var(--color-rule);
	border-radius: 8px;
	box-shadow: 0 12px 32px rgba(27, 24, 21, 0.12);
	max-height: 420px;
	overflow-y: auto;
	display: none;
	padding: var(--space-2);
}

.site-search__results.is-open { display: block; }

.site-search__result {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	padding: var(--space-2);
	text-decoration: none;
	border-radius: 6px;
}

.site-search__result:hover,
.site-search__result.is-active { background: var(--color-paper-dim); }

.site-search__result img {
	width: 40px;
	height: 56px;
	object-fit: cover;
	box-shadow: 0 2px 8px rgba(27,24,21,0.15);
	flex-shrink: 0;
}

.site-search__result-title {
	font-family: var(--font-display);
	font-size: 0.95rem;
	color: var(--color-ink);
	display: block;
}

.site-search__result-author {
	font-family: var(--font-ui);
	font-size: 0.75rem;
	color: var(--color-ink-soft);
}

.site-search__empty {
	padding: var(--space-3);
	font-family: var(--font-ui);
	font-size: 0.875rem;
	color: var(--color-ink-soft);
}

/* ==========================================================================
   5. Featured Review (homepage breakout)
   ========================================================================== */

.featured-review {
	padding-block: var(--space-8) var(--space-9);
	border-bottom: 1px solid var(--color-rule);
}

.featured-review__grid {
	display: grid;
	gap: var(--space-6);
	align-items: center;
}

@media (min-width: 780px) {
	.featured-review__grid {
		grid-template-columns: minmax(240px, 420px) 1fr;
		gap: var(--space-8);
	}
}

.featured-review__cover-wrap {
	opacity: 0;
	transform: translateY(12px);
}

.featured-review__cover {
	box-shadow: 0 24px 60px rgba(27, 24, 21, 0.18);
	transition: transform 400ms var(--ease-out);
}

.featured-review__cover-wrap:hover .featured-review__cover {
	transform: scale(1.015);
}

.featured-review__eyebrow {
	font-family: var(--font-ui);
	font-size: 0.8125rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--color-accent);
	margin-bottom: var(--space-3);
	display: block;
}

.featured-review__title {
	font-size: clamp(2rem, 1.6rem + 2vw, 3.75rem);
}

.featured-review__meta {
	font-family: var(--font-ui);
	font-size: 0.9375rem;
	color: var(--color-ink-soft);
	margin-bottom: var(--space-4);
}

.featured-review__excerpt {
	font-size: 1.125rem;
	max-width: 56ch;
	color: var(--color-ink-soft);
}

.link-arrow {
	font-family: var(--font-ui);
	font-weight: 500;
	color: var(--color-ink);
	text-decoration: none;
	border-bottom: 1px solid var(--color-ink);
	padding-bottom: 2px;
}

.link-arrow:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* ==========================================================================
   6. Rhythm Grid (archive / listings)
   ========================================================================== */

.rhythm-grid {
	display: grid;
	grid-template-columns: repeat(12, 1fr);
	gap: var(--space-6) var(--space-5);
}

.book-card {
	grid-column: span 12;
	opacity: 0;
	transform: translateY(10px);
}

@media (min-width: 600px) {
	.book-card--small { grid-column: span 6; }
	.book-card--medium { grid-column: span 6; }
}

@media (min-width: 900px) {
	.book-card--small { grid-column: span 4; }
	.book-card--medium { grid-column: span 5; }
	.book-card--large { grid-column: span 8; }
	.book-card--large { grid-column-start: auto; }
}

.book-card__link {
	text-decoration: none;
	color: inherit;
	display: block;
}

.book-card__cover-wrap {
	margin-bottom: var(--space-3);
	overflow: hidden;
}

.book-card__cover {
	width: 100%;
	box-shadow: 0 10px 30px rgba(27, 24, 21, 0.12);
	transition: transform 350ms var(--ease-out);
}

.book-card__link:hover .book-card__cover,
.book-card__link:focus-visible .book-card__cover {
	transform: scale(1.02);
}

.book-card--large .book-card__inner {
	display: flex;
	gap: var(--space-5);
	align-items: flex-start;
}

.book-card--large .book-card__cover-wrap { flex: 0 0 40%; margin-bottom: 0; }

.book-card__title {
	font-family: var(--font-display);
	font-size: 1.125rem;
	margin-bottom: var(--space-1);
}

.book-card--large .book-card__title { font-size: 1.75rem; }

.book-card__author {
	font-family: var(--font-ui);
	font-size: 0.8125rem;
	color: var(--color-ink-soft);
	margin-bottom: var(--space-2);
}

.book-card__topic {
	font-family: var(--font-ui);
	font-size: 0.75rem;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--color-accent);
}

.book-card__excerpt {
	font-size: 0.95rem;
	color: var(--color-ink-soft);
	margin-top: var(--space-2);
}

/* Reveal-on-scroll (JS adds .is-visible) */
.book-card.is-visible,
.featured-review__cover-wrap.is-visible {
	opacity: 1;
	transform: translateY(0);
	transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

/* ==========================================================================
   7. Single Review Page
   ========================================================================== */

.single-book {
	padding-block: var(--space-7) var(--space-9);
}

.single-book__header {
	max-width: var(--measure);
	margin: 0 auto var(--space-7);
	text-align: left;
}

.single-book__cover-figure {
	margin: 0 0 var(--space-6);
}

.single-book__cover-figure img {
	box-shadow: 0 20px 50px rgba(27,24,21,0.15);
}

.single-book--bleed .single-book__cover-figure {
	max-width: none;
	margin-left: calc(-1 * var(--space-4));
	margin-right: calc(-1 * var(--space-4));
}

@media (min-width: 900px) {
	.single-book--bleed .single-book__cover-figure {
		width: calc(var(--measure) + 220px);
		margin-left: -110px;
	}
}

.single-book__title { margin-bottom: var(--space-2); }

.single-book__meta {
	font-family: var(--font-ui);
	font-size: 0.9375rem;
	color: var(--color-ink-soft);
	margin-bottom: var(--space-2);
}

.single-book__meta a { color: var(--color-ink-soft); }

.single-book__tags {
	font-family: var(--font-ui);
	font-size: 0.8125rem;
	text-transform: uppercase;
	letter-spacing: 0.03em;
	color: var(--color-accent);
	display: flex;
	gap: var(--space-3);
	flex-wrap: wrap;
	margin-top: var(--space-3);
}

.single-book__tags a { color: var(--color-accent); text-decoration: none; }

.single-book__content {
	max-width: var(--measure);
	margin: 0 auto;
	font-size: 1.1875rem;
	line-height: 1.75;
}

.single-book__content p { margin-bottom: 1.5em; }

.single-book__retailer {
	max-width: var(--measure);
	margin: var(--space-7) auto 0;
	padding-top: var(--space-5);
	border-top: 1px solid var(--color-rule);
}

.single-book__retailer a {
	font-family: var(--font-ui);
	font-weight: 500;
}

/* ==========================================================================
   8. Taxonomy archive header
   ========================================================================== */

.archive-header {
	padding-block: var(--space-7) var(--space-6);
	border-bottom: 1px solid var(--color-rule);
	margin-bottom: var(--space-7);
}

.archive-header__eyebrow {
	font-family: var(--font-ui);
	font-size: 0.8125rem;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--color-accent);
}

.taxonomy-filter-list {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-3) var(--space-4);
	padding: 0;
	margin: var(--space-4) 0 0;
	font-family: var(--font-ui);
	font-size: 0.875rem;
}

.taxonomy-filter-list a { color: var(--color-ink-soft); text-decoration: none; }
.taxonomy-filter-list a:hover { color: var(--color-accent); }

/* ==========================================================================
   9. About page
   ========================================================================== */

.about-page {
	max-width: var(--measure);
	margin: 0 auto;
	padding-block: var(--space-8) var(--space-9);
}

.about-page__portrait {
	width: 160px;
	height: 160px;
	border-radius: 50%;
	object-fit: cover;
	margin-bottom: var(--space-5);
}

.about-page__content { font-size: 1.125rem; }

/* ==========================================================================
   10. Search results page
   ========================================================================== */

.search-page__input-wrap { margin-bottom: var(--space-7); }

.search-page__input {
	width: 100%;
	font-family: var(--font-display);
	font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
	border: none;
	border-bottom: 2px solid var(--color-ink);
	background: transparent;
	padding: var(--space-3) 0;
	color: var(--color-ink);
}

.search-page__input:focus { outline: none; border-color: var(--color-accent); }

.search-page__count {
	font-family: var(--font-ui);
	font-size: 0.875rem;
	color: var(--color-ink-soft);
	margin-top: var(--space-2);
}

/* ==========================================================================
   11. Footer
   ========================================================================== */

.site-footer {
	border-top: 1px solid var(--color-rule);
	padding-block: var(--space-8);
	margin-top: var(--space-9);
}

.site-footer__bio {
	max-width: 60ch;
	font-size: 1rem;
	color: var(--color-ink-soft);
	margin-bottom: var(--space-5);
}

.site-footer__nav {
	display: flex;
	gap: var(--space-5);
	list-style: none;
	padding: 0;
	margin: 0;
	font-family: var(--font-ui);
	font-size: 0.875rem;
}

.site-footer__nav a { color: var(--color-ink-soft); text-decoration: none; }
.site-footer__nav a:hover { color: var(--color-accent); }

/* ==========================================================================
   12. 404
   ========================================================================== */

.not-found {
	padding-block: var(--space-10);
	text-align: center;
}