/*
Theme Name: Relative Gravity Labs
Theme URI: https://relativegravitylabs.hu
Author: Relative Gravity Labs
Author URI: https://relativegravitylabs.hu
Description: A dark, sci-fi/space-lab WordPress theme built for Relative Gravity Labs — an independent gravitational-wave and anomalous-propulsion research organization. Custom post types for Research Projects, Team Members and Publications, a built-in contact form, and a starfield hero.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
Tested up to: 6.6
License: GNU General Public License v2 or later
License URI: LICENSE
Text Domain: relativegravitylabs
Tags: dark, one-column, custom-post-types, custom-menu, featured-images, translation-ready

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned.
*/

/* ==========================================================================
   0. Design Tokens
   ========================================================================== */

:root {
	--rgl-bg:            #05070c;
	--rgl-bg-alt:        #090c14;
	--rgl-surface:       #10141f;
	--rgl-surface-2:     #161c2b;
	--rgl-border:        #232a3d;
	--rgl-border-soft:   #1a2030;

	--rgl-text:          #e7eaf3;
	--rgl-text-muted:    #97a0b8;
	--rgl-text-faint:    #616a84;

	--rgl-accent:        #57e2ff;
	--rgl-accent-soft:   rgba(87, 226, 255, 0.12);
	--rgl-accent-2:      #9b7bff;
	--rgl-accent-2-soft: rgba(155, 123, 255, 0.14);
	--rgl-warn:          #ffb454;

	--rgl-font-display:  'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
	--rgl-font-body:     'Inter', 'Segoe UI', system-ui, sans-serif;
	--rgl-font-mono:     'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

	--rgl-radius:        14px;
	--rgl-radius-sm:     8px;
	--rgl-max:           1160px;
	--rgl-shadow:        0 20px 60px -20px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   1. Reset / Base
   ========================================================================== */

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

html { scroll-behavior: smooth; }

body {
	margin: 0;
	background: var(--rgl-bg);
	color: var(--rgl-text);
	font-family: var(--rgl-font-body);
	font-size: 16px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}

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

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

h1, h2, h3, h4, h5, h6 {
	font-family: var(--rgl-font-display);
	font-weight: 600;
	line-height: 1.2;
	margin: 0 0 0.5em;
	letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1.2em; color: var(--rgl-text); }

ul, ol { padding-left: 1.2em; }

blockquote {
	border-left: 3px solid var(--rgl-accent);
	margin: 1.5em 0;
	padding: 0.4em 1.2em;
	color: var(--rgl-text-muted);
	font-style: italic;
}

hr { border: none; border-top: 1px solid var(--rgl-border); margin: 2.5em 0; }

::selection { background: var(--rgl-accent-2); color: #05070c; }

.container {
	max-width: var(--rgl-max);
	margin: 0 auto;
	padding: 0 24px;
}

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	overflow: hidden;
	clip: rect(1px, 1px, 1px, 1px);
	white-space: nowrap;
}

.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	background: var(--rgl-accent);
	color: #05070c;
	padding: 10px 16px;
	z-index: 10000;
	border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* Eyebrow / kicker label, used everywhere for the "technical readout" feel */
.eyebrow {
	font-family: var(--rgl-font-mono);
	text-transform: uppercase;
	letter-spacing: 0.14em;
	font-size: 0.75rem;
	color: var(--rgl-accent);
	display: inline-flex;
	align-items: center;
	gap: 8px;
	margin-bottom: 14px;
}
.eyebrow::before {
	content: '';
	width: 7px; height: 7px;
	border-radius: 50%;
	background: var(--rgl-accent);
	box-shadow: 0 0 10px var(--rgl-accent);
}

.lede {
	font-size: 1.15rem;
	color: var(--rgl-text-muted);
	max-width: 62ch;
}

/* Buttons */
.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-family: var(--rgl-font-mono);
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	padding: 13px 24px;
	border-radius: var(--rgl-radius-sm);
	border: 1px solid var(--rgl-border);
	background: transparent;
	color: var(--rgl-text);
	cursor: pointer;
	transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.btn:hover { border-color: var(--rgl-accent); color: var(--rgl-accent); transform: translateY(-1px); }
.btn-primary {
	background: var(--rgl-accent);
	border-color: var(--rgl-accent);
	color: #04151a;
	font-weight: 600;
}
.btn-primary:hover { background: #7ce9ff; border-color: #7ce9ff; color: #04151a; }
.btn-arrow::after { content: '→'; transition: transform 0.2s ease; }
.btn-arrow:hover::after { transform: translateX(3px); }

/* Tag / badge chips */
.chip {
	display: inline-block;
	font-family: var(--rgl-font-mono);
	font-size: 0.7rem;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	padding: 4px 10px;
	border-radius: 999px;
	border: 1px solid var(--rgl-border);
	color: var(--rgl-text-muted);
}
.chip-active   { color: #6ee7a8; border-color: rgba(110,231,168,0.35); background: rgba(110,231,168,0.08); }
.chip-classified { color: #ff9d9d; border-color: rgba(255,157,157,0.35); background: rgba(255,157,157,0.08); }
.chip-concluded { color: #97a0b8; border-color: var(--rgl-border); background: rgba(151,160,184,0.06); }

/* ==========================================================================
   2. Starfield backdrop
   ========================================================================== */

#rgl-starfield {
	position: fixed;
	inset: 0;
	z-index: 0;
	pointer-events: none;
	opacity: 0.9;
}

.rgl-grid-overlay {
	position: fixed;
	inset: 0;
	z-index: 0;
	pointer-events: none;
	background-image:
		linear-gradient(rgba(87, 226, 255, 0.035) 1px, transparent 1px),
		linear-gradient(90deg, rgba(87, 226, 255, 0.035) 1px, transparent 1px);
	background-size: 64px 64px;
	mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
}

#page { position: relative; z-index: 1; }

/* ==========================================================================
   3. Header / Navigation
   ========================================================================== */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	backdrop-filter: blur(14px);
	background: rgba(5, 7, 12, 0.72);
	border-bottom: 1px solid var(--rgl-border-soft);
}

.site-header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 18px 24px;
	max-width: var(--rgl-max);
	margin: 0 auto;
}

.site-branding { display: flex; align-items: center; gap: 12px; }

.site-branding a { display: flex; align-items: center; gap: 10px; color: var(--rgl-text); }

.rgl-mark {
	width: 34px; height: 34px;
	flex: none;
}

.site-title {
	font-family: var(--rgl-font-display);
	font-size: 1.05rem;
	font-weight: 700;
	letter-spacing: 0.01em;
	line-height: 1.1;
	margin: 0;
}
.site-title .accent { color: var(--rgl-accent); }

.site-tagline {
	display: block;
	font-family: var(--rgl-font-mono);
	font-size: 0.65rem;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--rgl-text-faint);
}

.nav-menu {
	list-style: none;
	display: flex;
	align-items: center;
	gap: 6px;
	margin: 0;
	padding: 0;
}

.nav-menu li a {
	display: block;
	padding: 10px 16px;
	font-family: var(--rgl-font-mono);
	font-size: 0.82rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--rgl-text-muted);
	border-radius: var(--rgl-radius-sm);
	transition: color 0.2s ease, background 0.2s ease;
}
.nav-menu li a:hover,
.nav-menu li.current-menu-item > a,
.nav-menu li.current_page_item > a {
	color: var(--rgl-accent);
	background: var(--rgl-accent-soft);
}

.header-cta { display: flex; align-items: center; gap: 10px; }

.menu-toggle {
	display: none;
	background: transparent;
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius-sm);
	width: 42px; height: 42px;
	align-items: center;
	justify-content: center;
	color: var(--rgl-text);
	cursor: pointer;
}

/* ==========================================================================
   4. Hero
   ========================================================================== */

.hero {
	padding: 110px 0 90px;
	position: relative;
	border-bottom: 1px solid var(--rgl-border-soft);
}

.hero-inner { max-width: 760px; }

.hero h1 { margin-bottom: 22px; }
.hero h1 .accent { color: var(--rgl-accent); }

.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }

.hero-stats {
	display: grid;
	grid-template-columns: repeat(4, minmax(0,1fr));
	gap: 1px;
	background: var(--rgl-border);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius);
	overflow: hidden;
	margin-top: 64px;
}
.hero-stat {
	background: var(--rgl-surface);
	padding: 22px 20px;
}
.hero-stat .num {
	font-family: var(--rgl-font-mono);
	font-size: 1.6rem;
	color: var(--rgl-accent);
	display: block;
}
.hero-stat .label {
	font-size: 0.78rem;
	color: var(--rgl-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.05em;
}

.wave-divider { display: block; width: 100%; height: 60px; opacity: 0.5; }

/* ==========================================================================
   5. Sections / Layout
   ========================================================================== */

.section { padding: 90px 0; border-bottom: 1px solid var(--rgl-border-soft); }
.section:last-of-type { border-bottom: none; }
.section-head {
	display: flex;
	align-items: flex-end;
	justify-content: space-between;
	gap: 24px;
	margin-bottom: 44px;
	flex-wrap: wrap;
}
.section-head .lede { margin-bottom: 0; }

.grid {
	display: grid;
	gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }

/* ==========================================================================
   6. Cards
   ========================================================================== */

.card {
	background: var(--rgl-surface);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius);
	padding: 28px;
	position: relative;
	transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
	display: flex;
	flex-direction: column;
	height: 100%;
}
.card:hover {
	border-color: rgba(87, 226, 255, 0.35);
	transform: translateY(-3px);
	box-shadow: var(--rgl-shadow);
}
.card-media {
	margin: -28px -28px 20px;
	border-radius: var(--rgl-radius) var(--rgl-radius) 0 0;
	overflow: hidden;
	aspect-ratio: 16/10;
	background: linear-gradient(135deg, var(--rgl-surface-2), var(--rgl-bg));
}
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-meta { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.card h3 { margin-bottom: 10px; }
.card h3 a { color: var(--rgl-text); }
.card h3 a:hover { color: var(--rgl-accent); }
.card p { color: var(--rgl-text-muted); font-size: 0.95rem; margin-bottom: 16px; }
.card-foot {
	margin-top: auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-top: 16px;
	border-top: 1px solid var(--rgl-border-soft);
	font-family: var(--rgl-font-mono);
	font-size: 0.78rem;
	color: var(--rgl-text-faint);
}

/* Team card variant */
.card-team { text-align: center; align-items: center; }
.card-team .avatar {
	width: 96px; height: 96px;
	border-radius: 50%;
	overflow: hidden;
	margin: -28px auto 16px;
	border: 3px solid var(--rgl-bg);
	background: linear-gradient(135deg, var(--rgl-accent-2-soft), var(--rgl-accent-soft));
	display: flex; align-items: center; justify-content: center;
	font-family: var(--rgl-font-display);
	font-size: 1.6rem;
	color: var(--rgl-accent);
}
.card-team .role {
	font-family: var(--rgl-font-mono);
	font-size: 0.78rem;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--rgl-accent);
	margin-bottom: 12px;
}

/* Publication row */
.pub-list { display: flex; flex-direction: column; gap: 1px; background: var(--rgl-border); border: 1px solid var(--rgl-border); border-radius: var(--rgl-radius); overflow: hidden; }
.pub-item {
	background: var(--rgl-surface);
	padding: 24px 28px;
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 20px;
	flex-wrap: wrap;
}
.pub-item h3 { margin-bottom: 6px; font-size: 1.15rem; }
.pub-item h3 a { color: var(--rgl-text); }
.pub-item h3 a:hover { color: var(--rgl-accent); }
.pub-meta { font-family: var(--rgl-font-mono); font-size: 0.78rem; color: var(--rgl-text-faint); }
.pub-item .btn { flex: none; }

/* Blog / post list */
.post-list { display: grid; gap: 24px; }
.post-item {
	display: grid;
	grid-template-columns: 140px 1fr;
	gap: 24px;
	background: var(--rgl-surface);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius);
	padding: 24px;
}
.post-item .post-date {
	font-family: var(--rgl-font-mono);
	color: var(--rgl-text-faint);
	font-size: 0.8rem;
	border-right: 1px solid var(--rgl-border-soft);
	padding-right: 20px;
}
.post-item h2, .post-item h3 { font-size: 1.25rem; margin-bottom: 8px; }
.post-item h2 a, .post-item h3 a { color: var(--rgl-text); }
.post-item h2 a:hover, .post-item h3 a:hover { color: var(--rgl-accent); }
.post-item p { color: var(--rgl-text-muted); margin-bottom: 0; }

/* Single content */
.single-content, .page-content {
	max-width: 760px;
}
.single-content img, .page-content img { border-radius: var(--rgl-radius); }
.entry-header { margin-bottom: 32px; }
.entry-meta { font-family: var(--rgl-font-mono); font-size: 0.8rem; color: var(--rgl-text-faint); margin-bottom: 14px; }
.entry-thumb { border-radius: var(--rgl-radius); overflow: hidden; margin-bottom: 40px; border: 1px solid var(--rgl-border); }

/* ==========================================================================
   7. About page
   ========================================================================== */

.about-hero { padding-bottom: 50px; }
.value-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; margin-top: 20px; }
.value-card { border: 1px solid var(--rgl-border); border-radius: var(--rgl-radius); padding: 24px; background: var(--rgl-surface); }
.value-card .index { font-family: var(--rgl-font-mono); color: var(--rgl-accent-2); font-size: 0.85rem; display: block; margin-bottom: 10px; }

.timeline { border-left: 1px solid var(--rgl-border); margin-left: 8px; }
.timeline-item { position: relative; padding: 0 0 40px 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
	content: '';
	position: absolute;
	left: -6.5px; top: 4px;
	width: 12px; height: 12px;
	border-radius: 50%;
	background: var(--rgl-bg);
	border: 2px solid var(--rgl-accent);
}
.timeline-year { font-family: var(--rgl-font-mono); color: var(--rgl-accent); font-size: 0.85rem; margin-bottom: 6px; display:block; }

/* ==========================================================================
   8. Contact
   ========================================================================== */

.contact-wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
.contact-info-card {
	background: var(--rgl-surface);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius);
	padding: 32px;
}
.contact-info-card dt { font-family: var(--rgl-font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--rgl-text-faint); margin-top: 18px; }
.contact-info-card dt:first-child { margin-top: 0; }
.contact-info-card dd { margin: 4px 0 0; color: var(--rgl-text); }

.form-row { margin-bottom: 20px; }
.form-row label {
	display: block;
	font-family: var(--rgl-font-mono);
	font-size: 0.78rem;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--rgl-text-muted);
	margin-bottom: 8px;
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row textarea {
	width: 100%;
	background: var(--rgl-surface);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius-sm);
	padding: 13px 16px;
	color: var(--rgl-text);
	font-family: var(--rgl-font-body);
	font-size: 0.95rem;
	transition: border-color 0.2s ease;
}
.form-row input:focus, .form-row textarea:focus {
	outline: none;
	border-color: var(--rgl-accent);
}
.form-row textarea { min-height: 150px; resize: vertical; }
.hp-field { position: absolute; left: -9999px; opacity: 0; }

.form-notice { border-radius: var(--rgl-radius-sm); padding: 14px 18px; margin-bottom: 24px; font-size: 0.9rem; font-family: var(--rgl-font-mono); }
.form-notice.success { background: rgba(110,231,168,0.08); border: 1px solid rgba(110,231,168,0.3); color: #6ee7a8; }
.form-notice.error { background: rgba(255,157,157,0.08); border: 1px solid rgba(255,157,157,0.3); color: #ff9d9d; }

/* ==========================================================================
   9. Footer
   ========================================================================== */

.site-footer {
	border-top: 1px solid var(--rgl-border-soft);
	padding: 70px 0 30px;
	position: relative;
}
.footer-grid {
	display: grid;
	grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
	gap: 40px;
	padding-bottom: 50px;
}
.footer-brand p { color: var(--rgl-text-muted); font-size: 0.92rem; max-width: 34ch; }
.footer-widget-title, .footer-col h4 {
	font-family: var(--rgl-font-mono);
	font-size: 0.75rem;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--rgl-text-faint);
	margin-bottom: 16px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { color: var(--rgl-text-muted); font-size: 0.92rem; }
.footer-col ul a:hover { color: var(--rgl-accent); }

.footer-bottom {
	border-top: 1px solid var(--rgl-border-soft);
	padding-top: 26px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 12px;
	font-family: var(--rgl-font-mono);
	font-size: 0.75rem;
	color: var(--rgl-text-faint);
}
.social-links { display: flex; gap: 10px; }
.social-links a {
	width: 34px; height: 34px;
	display: flex; align-items: center; justify-content: center;
	border: 1px solid var(--rgl-border);
	border-radius: 50%;
	color: var(--rgl-text-muted);
}
.social-links a:hover { color: var(--rgl-accent); border-color: var(--rgl-accent); }

/* ==========================================================================
   10. 404 / misc
   ========================================================================== */

.error-404 { padding: 140px 0; text-align: center; }
.error-404 .code {
	font-family: var(--rgl-font-mono);
	font-size: 5rem;
	color: var(--rgl-accent);
	line-height: 1;
	margin-bottom: 12px;
	text-shadow: 0 0 40px var(--rgl-accent-soft);
}

.pagination { display: flex; gap: 10px; justify-content: center; margin-top: 50px; }
.pagination a, .pagination span {
	padding: 10px 16px;
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius-sm);
	font-family: var(--rgl-font-mono);
	font-size: 0.85rem;
	color: var(--rgl-text-muted);
}
.pagination .current { color: var(--rgl-accent); border-color: var(--rgl-accent); }

/* Comments */
.comments-area { max-width: 760px; margin-top: 60px; }
.comment-list { list-style: none; padding: 0; }
.comment-body { background: var(--rgl-surface); border: 1px solid var(--rgl-border); border-radius: var(--rgl-radius); padding: 20px; margin-bottom: 16px; }
.comment-respond input, .comment-respond textarea {
	width: 100%;
	background: var(--rgl-surface);
	border: 1px solid var(--rgl-border);
	border-radius: var(--rgl-radius-sm);
	padding: 12px 14px;
	color: var(--rgl-text);
	margin-bottom: 14px;
}

/* ==========================================================================
   11. Responsive
   ========================================================================== */

@media (max-width: 900px) {
	.hero-stats { grid-template-columns: repeat(2, 1fr); }
	.grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
	.footer-grid { grid-template-columns: repeat(2, 1fr); }
	.contact-wrap { grid-template-columns: 1fr; }
	.value-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
	.nav-menu { position: fixed; top: 74px; left: 0; right: 0; bottom: 0; flex-direction: column; align-items: stretch; background: var(--rgl-bg); padding: 20px; gap: 4px; transform: translateX(100%); transition: transform 0.3s ease; overflow-y: auto; }
	.nav-menu.is-open { transform: translateX(0); }
	.nav-menu li a { padding: 14px 16px; font-size: 0.95rem; }
	.menu-toggle { display: flex; }
	.header-cta .btn-primary { display: none; }
	.hero { padding: 70px 0 60px; }
	.hero-stats { grid-template-columns: repeat(2, 1fr); }
	.grid-3, .grid-2 { grid-template-columns: 1fr; }
	.footer-grid { grid-template-columns: 1fr; gap: 32px; }
	.post-item { grid-template-columns: 1fr; }
	.post-item .post-date { border-right: none; border-bottom: 1px solid var(--rgl-border-soft); padding-right: 0; padding-bottom: 10px; }
	.pub-item { flex-direction: column; }
	.section { padding: 60px 0; }
}