/*
Theme Name: pg-reference
Description: Reference theme for PatentGenius — an independent research archive of US patent data. Schematic and CAD-flavoured: monospaced headings, 2px corners, dashed cyan rules, no shadows, the widest measure in the portfolio.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 8.0
Text Domain: pg-reference
*/

/* ------------------------------------------------------------------ *
 * Tokens
 * The container is 1320px, deliberately the widest in the portfolio —
 * patent claim tables and classification grids need the room.
 * ------------------------------------------------------------------ */

:root {
	--pg-navy:  #0b3554;
	--pg-cyan:  #3ba7c7;
	--pg-paper: #f1f4f8;
	--pg-ink:   #0f1724;

	--pg-navy-soft: #1c4d73;
	--pg-rule:      #c3d0dd;
	--pg-muted:     #5a6b7d;
	--pg-sheet:     #ffffff;

	--pg-measure:      1320px;
	--pg-measure-read: 760px;

	--pg-face-head: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
	--pg-face-body: 'Inter Tight', 'Helvetica Neue', Arial, sans-serif;

	--pg-radius: 2px;

	--pg-s1: 0.5rem;
	--pg-s2: 1rem;
	--pg-s3: 1.75rem;
	--pg-s4: 3rem;
	--pg-s5: 4.5rem;
}

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

body {
	margin: 0;
	background: var(--pg-paper);
	color: var(--pg-ink);
	font-family: var(--pg-face-body);
	font-size: 1rem;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

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

a {
	color: var(--pg-navy);
	text-decoration: underline;
	text-underline-offset: 0.16em;
	text-decoration-thickness: 1px;
	transition: color 110ms linear;
}

/* Colour shift plus underline only — no lift, no shadow. */
a:hover, a:focus-visible { color: var(--pg-cyan); }

:focus-visible { outline: 2px solid var(--pg-cyan); outline-offset: 2px; }

h1, h2, h3, h4 {
	font-family: var(--pg-face-head);
	font-weight: 700;
	color: var(--pg-navy);
	line-height: 1.2;
	letter-spacing: -0.01em;
	margin: 0 0 var(--pg-s2);
}

h1 { font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.4rem); }
h2 { font-size: clamp(1.25rem, 1.05rem + 0.8vw, 1.6rem); font-weight: 500; }
h3 { font-size: 1.1rem;  font-weight: 500; }
h4 { font-size: 0.98rem; font-weight: 500; }

p, ul, ol, table, figure, blockquote { margin: 0 0 var(--pg-s3); }

code, pre, .pg-mono {
	font-family: var(--pg-face-head);
	font-size: 0.9em;
}

code {
	background: rgba(59, 167, 199, 0.12);
	border: 1px solid rgba(59, 167, 199, 0.35);
	border-radius: var(--pg-radius);
	padding: 0.08em 0.35em;
}

pre { background: var(--pg-sheet); border: 1px solid var(--pg-rule); padding: var(--pg-s2); overflow-x: auto; }
pre code { background: none; border: 0; padding: 0; }

/* The signature divider: a dashed cyan rule instead of a drop shadow. */
hr, .pg-schematic-rule {
	border: 0;
	border-top: 1px dashed var(--pg-cyan);
	margin: var(--pg-s4) 0;
	height: 0;
}

.pg-shell {
	width: 100%;
	max-width: var(--pg-measure);
	margin-inline: auto;
	padding-inline: 1.25rem;
}

.pg-skip { position: absolute; left: -9999px; background: var(--pg-navy); color: #fff; padding: 0.6rem 1rem; z-index: 100; }
.pg-skip:focus { left: 1rem; top: 1rem; }

/* ------------------------------------------------------------------ *
 * Masthead
 * ------------------------------------------------------------------ */

.pg-masthead {
	background: var(--pg-sheet);
	border-bottom: 1px solid var(--pg-navy);
	position: sticky;
	top: 0;
	z-index: 40;
}

.pg-masthead__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--pg-s3);
	min-height: 64px;
}

.pg-wordmark {
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	text-decoration: none;
	color: var(--pg-navy);
	flex-shrink: 0;
}

.pg-wordmark svg { width: 32px; height: 32px; }

.pg-wordmark__text {
	font-family: var(--pg-face-head);
	font-weight: 700;
	font-size: 1.12rem;
	letter-spacing: -0.03em;
}

.pg-nav ul { display: flex; flex-wrap: wrap; gap: 1.1rem; list-style: none; margin: 0; padding: 0; }

.pg-nav a {
	font-family: var(--pg-face-head);
	font-size: 0.8rem;
	font-weight: 500;
	letter-spacing: 0.02em;
	text-transform: uppercase;
	text-decoration: none;
	color: var(--pg-navy);
	padding-block: 0.3rem;
	border-bottom: 1px solid transparent;
}

.pg-nav a:hover,
.pg-nav .current-menu-item > a { color: var(--pg-cyan); border-bottom-color: var(--pg-cyan); }

.pg-navtoggle {
	display: none;
	background: none;
	border: 1px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	color: var(--pg-navy);
	font-family: var(--pg-face-head);
	font-size: 0.75rem;
	text-transform: uppercase;
	padding: 0.4rem 0.65rem;
	cursor: pointer;
}

@media (max-width: 860px) {
	.pg-navtoggle { display: block; }
	.pg-nav { display: none; width: 100%; order: 3; border-top: 1px dashed var(--pg-cyan); padding-block: var(--pg-s2); }
	.pg-nav.is-open { display: block; }
	.pg-nav ul { flex-direction: column; gap: 0.6rem; }
	.pg-masthead__inner { flex-wrap: wrap; }
}

/* ------------------------------------------------------------------ *
 * Search hero
 * ------------------------------------------------------------------ */

.pg-search-hero {
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-top: 3px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	padding: var(--pg-s4) var(--pg-s3);
	margin-block: var(--pg-s4);
}

.pg-search-hero h1 { max-width: 22ch; }

.pg-search-hero__sub {
	max-width: 62ch;
	color: var(--pg-muted);
	font-size: 1.05rem;
	margin-bottom: var(--pg-s3);
}

.pg-searchform { display: flex; flex-wrap: wrap; gap: 0.5rem; max-width: 640px; }

.pg-searchform input[type="search"] {
	flex: 1 1 16rem;
	font-family: var(--pg-face-head);
	font-size: 0.95rem;
	padding: 0.6rem 0.75rem;
	border: 1px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	background: var(--pg-paper);
	color: var(--pg-ink);
}

.pg-searchform button {
	font-family: var(--pg-face-head);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	padding: 0.6rem 1.2rem;
	border: 1px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	background: var(--pg-navy);
	color: #fff;
	cursor: pointer;
	transition: background 110ms linear;
}

.pg-searchform button:hover { background: var(--pg-cyan); border-color: var(--pg-cyan); }

/* ------------------------------------------------------------------ *
 * Page head
 * ------------------------------------------------------------------ */

.pg-pagehead {
	padding-block: var(--pg-s4) var(--pg-s2);
	border-bottom: 1px dashed var(--pg-cyan);
	margin-bottom: var(--pg-s4);
}

.pg-kicker {
	font-family: var(--pg-face-head);
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--pg-cyan);
	margin: 0 0 var(--pg-s1);
}

.pg-pagehead__sub { max-width: 72ch; color: var(--pg-muted); margin-bottom: 0; }

/* Patent numbers: monospaced, tracked out, bold. */
.pg-patentno {
	font-family: var(--pg-face-head);
	font-weight: 700;
	letter-spacing: 0.06em;
	color: var(--pg-navy);
}

/* Large display numerals for dates. */
.pg-datebig {
	font-family: var(--pg-face-head);
	font-weight: 700;
	font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.1rem);
	line-height: 1;
	color: var(--pg-navy);
	display: block;
}

.pg-classcode {
	font-family: var(--pg-face-head);
	font-size: 0.85em;
	background: rgba(59, 167, 199, 0.12);
	border: 1px solid rgba(59, 167, 199, 0.35);
	border-radius: var(--pg-radius);
	padding: 0.08em 0.4em;
	white-space: nowrap;
}

/* ------------------------------------------------------------------ *
 * Cards and grids
 * ------------------------------------------------------------------ */

.pg-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: var(--pg-s3);
	margin-bottom: var(--pg-s4);
}

.pg-inventor-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
	gap: var(--pg-s2) var(--pg-s3);
	margin-bottom: var(--pg-s4);
}

.pg-patent-card {
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-left: 3px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	box-shadow: none;
	padding: var(--pg-s2);
	transition: border-left-color 110ms linear;
}

.pg-patent-card:hover { border-left-color: var(--pg-cyan); }

.pg-patent-card__no { font-size: 0.82rem; margin: 0 0 0.35rem; }

.pg-patent-card__title {
	font-family: var(--pg-face-body);
	font-size: 1rem;
	font-weight: 600;
	line-height: 1.3;
	margin: 0 0 0.4rem;
	color: var(--pg-ink);
}

.pg-patent-card__title a { text-decoration: none; color: inherit; }
.pg-patent-card:hover .pg-patent-card__title a { color: var(--pg-cyan); }

.pg-patent-card__meta { font-size: 0.8rem; color: var(--pg-muted); margin: 0; }

.pg-patent-card__media { margin: calc(var(--pg-s2) * -1) calc(var(--pg-s2) * -1) var(--pg-s2); }
.pg-patent-card__media img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }

/* ------------------------------------------------------------------ *
 * Data table — the spec sheet on a patent page
 * ------------------------------------------------------------------ */

.pg-spec {
	width: 100%;
	border-collapse: collapse;
	font-size: 0.92rem;
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-radius: var(--pg-radius);
}

.pg-spec th, .pg-spec td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px dotted var(--pg-cyan); vertical-align: top; }
.pg-spec tr:last-child th, .pg-spec tr:last-child td { border-bottom: 0; }

.pg-spec th {
	font-family: var(--pg-face-head);
	font-size: 0.76rem;
	font-weight: 500;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--pg-muted);
	width: 13rem;
	white-space: nowrap;
}

.pg-layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: var(--pg-s4);
}

@media (min-width: 1000px) {
	.pg-layout--split { grid-template-columns: minmax(0, 1fr) 24rem; }
}

/* ------------------------------------------------------------------ *
 * Claims + abstract
 * ------------------------------------------------------------------ */

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

.pg-abstract {
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-top: 2px solid var(--pg-cyan);
	border-radius: var(--pg-radius);
	padding: var(--pg-s3);
	margin-bottom: var(--pg-s4);
}

.pg-abstract p:last-child { margin-bottom: 0; }

.pg-claims {
	font-size: 0.95rem;
	line-height: 1.7;
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-radius: var(--pg-radius);
	padding: var(--pg-s3);
}

/* ------------------------------------------------------------------ *
 * Citation block — the mandatory USPTO link lives here
 * ------------------------------------------------------------------ */

.pg-cite-block {
	border-top: 1px dashed var(--pg-cyan);
	border-bottom: 1px dashed var(--pg-cyan);
	padding: var(--pg-s2) 0;
	margin: var(--pg-s4) 0;
	font-size: 0.88rem;
	color: var(--pg-muted);
}

.pg-cite-block__label {
	font-family: var(--pg-face-head);
	font-size: 0.7rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--pg-cyan);
	margin-bottom: 0.4rem;
}

.pg-uspto-link {
	display: inline-block;
	font-family: var(--pg-face-head);
	font-size: 0.85rem;
	letter-spacing: 0.04em;
	border: 1px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	padding: 0.45rem 0.9rem;
	text-decoration: none;
	color: var(--pg-navy);
	transition: color 110ms linear, border-color 110ms linear;
}

.pg-uspto-link:hover { color: var(--pg-cyan); border-color: var(--pg-cyan); }

/* ------------------------------------------------------------------ *
 * Listings and pagination
 * ------------------------------------------------------------------ */

.pg-sectionhead {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: var(--pg-s2);
	border-bottom: 1px solid var(--pg-navy);
	padding-bottom: var(--pg-s1);
	margin-bottom: var(--pg-s3);
}

.pg-sectionhead h2 { margin: 0; }

.pg-sectionhead__more {
	font-family: var(--pg-face-head);
	font-size: 0.75rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	text-decoration: none;
	white-space: nowrap;
}

.pg-linklist { list-style: none; margin: 0 0 var(--pg-s4); padding: 0; }

.pg-linklist li { border-bottom: 1px dotted var(--pg-cyan); padding: 0.55rem 0; }

.pg-linklist a { text-decoration: none; }

.pg-linklist__meta { font-size: 0.8rem; color: var(--pg-muted); display: block; }

.pg-pagination { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: var(--pg-s4) 0; }

.pg-pagination .page-numbers {
	font-family: var(--pg-face-head);
	font-size: 0.85rem;
	border: 1px solid var(--pg-rule);
	border-radius: var(--pg-radius);
	padding: 0.3rem 0.65rem;
	text-decoration: none;
	background: var(--pg-sheet);
}

.pg-pagination .page-numbers.current { background: var(--pg-navy); border-color: var(--pg-navy); color: #fff; }

/* ------------------------------------------------------------------ *
 * Byline
 * ------------------------------------------------------------------ */

.pg-byline {
	display: flex;
	gap: var(--pg-s2);
	align-items: flex-start;
	border-top: 1px dashed var(--pg-cyan);
	padding-top: var(--pg-s2);
	margin-top: var(--pg-s4);
	max-width: var(--pg-measure-read);
}

.pg-byline img { width: 64px; height: 64px; object-fit: cover; border-radius: var(--pg-radius); flex-shrink: 0; }
.pg-byline__name { font-family: var(--pg-face-head); font-weight: 700; font-size: 0.95rem; margin: 0 0 0.15rem; color: var(--pg-navy); }
.pg-byline__role { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--pg-cyan); margin: 0 0 0.35rem; }
.pg-byline__bio  { font-size: 0.86rem; color: var(--pg-muted); margin: 0; }

/* ------------------------------------------------------------------ *
 * Colophon — two columns, deliberately not the three-column pattern
 * ------------------------------------------------------------------ */

.pg-colophon {
	background: var(--pg-sheet);
	border-top: 1px solid var(--pg-navy);
	margin-top: var(--pg-s5);
	padding-block: var(--pg-s4) var(--pg-s3);
	font-size: 0.88rem;
}

.pg-colophon__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--pg-s4); margin-bottom: var(--pg-s3); }

.pg-colophon h3 {
	font-family: var(--pg-face-head);
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--pg-cyan);
	margin-bottom: 0.7rem;
}

.pg-colophon ul { list-style: none; margin: 0; padding: 0; columns: 2; }
.pg-colophon li { margin-bottom: 0.3rem; break-inside: avoid; }
.pg-colophon a { text-decoration: none; }

/* The independence disclaimer is mandatory on every page. */
.pg-disclaimer {
	border-top: 1px dashed var(--pg-cyan);
	padding-top: var(--pg-s2);
	font-size: 0.82rem;
	line-height: 1.55;
	color: var(--pg-muted);
	max-width: 78ch;
}

.pg-colophon__base {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 0.5rem var(--pg-s3);
	align-items: center;
	margin-top: var(--pg-s2);
	font-size: 0.8rem;
	color: var(--pg-muted);
}

/* ------------------------------------------------------------------ *
 * Contact — read-only, no submission anywhere on this site
 * ------------------------------------------------------------------ */

.pg-contact-card {
	background: var(--pg-sheet);
	border: 1px solid var(--pg-rule);
	border-left: 3px solid var(--pg-navy);
	border-radius: var(--pg-radius);
	padding: var(--pg-s3);
	max-width: var(--pg-measure-read);
}

.pg-contact-card dt {
	font-family: var(--pg-face-head);
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--pg-cyan);
	margin-bottom: 0.2rem;
}

.pg-contact-card dd { margin: 0 0 var(--pg-s2); }

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

@media print {
	.pg-masthead, .pg-colophon, .pg-navtoggle, .pg-searchform { display: none; }
	body { background: #fff; }
}

/* ------------------------------------------------------------------ *
 * FAQ (added 2026-07-30)
 * ------------------------------------------------------------------ */

.pg-faq { max-width: 78ch; }

.pg-faq-item {
	border-bottom: 1px dotted var(--pg-cyan);
	padding: 0.85rem 0;
}

.pg-faq-item summary {
	cursor: pointer;
	font-family: var(--pg-face-head);
	font-size: 0.98rem;
	font-weight: 500;
	color: var(--pg-navy);
	list-style: none;
}

.pg-faq-item summary::-webkit-details-marker { display: none; }

.pg-faq-item summary::before {
	content: "+";
	display: inline-block;
	width: 1.2em;
	color: var(--pg-cyan);
	font-weight: 700;
}

.pg-faq-item[open] summary::before { content: "\2212"; }

.pg-faq-item p {
	margin: 0.55rem 0 0 1.2em;
	color: var(--pg-muted);
	font-size: 0.94rem;
}

/* The FAQ question is a real heading, so it sits in the document outline;
   the summary keeps its inline appearance. */
.pg-faq-q {
	display: inline;
	margin: 0;
	font-family: inherit;
	font-size: inherit;
	font-weight: inherit;
	color: inherit;
	letter-spacing: inherit;
}