/*
Theme Name: G-Bit
Theme URI: https://g-bit.tech
Author: A. Sepulveda-Jimenez
Author URI: https://g-bit.tech
Description: A dark, typographically rigorous WordPress theme for research groups publishing in quantum mechanics, probability theory, and mathematical physics. Includes a Papers custom post type with abstract/PDF/arXiv metadata, KaTeX math rendering, and a fast, dependency-free front end. Built as a migration target for the g-bit.tech site.
Version: 1.2.0
Requires at least: 6.2
Tested up to: 6.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: gbit
Tags: one-column, custom-colors, custom-menu, custom-logo, featured-images, block-styles, wide-blocks, editor-style, translation-ready, full-width-template
*/

/* ==========================================================================
   1. Design tokens
   ========================================================================== */

:root {
  /* Surfaces */
  --gb-bg:            #070b14;
  --gb-bg-alt:        #0b1220;
  --gb-surface:       #101a2c;
  --gb-surface-2:     #16223a;
  --gb-border:        #1f2d47;
  --gb-border-soft:   #17223a;

  /* Text */
  --gb-text:          #e8eefb;
  --gb-text-muted:    #9fb0c9;
  --gb-text-faint:    #6b7f9e;

  /* Accents */
  --gb-accent:        #48c8f5;
  --gb-accent-strong: #7ddcff;
  --gb-accent-deep:   #1b7fa8;
  --gb-violet:        #a98bfa;
  --gb-violet-soft:   #c9b6ff;

  /* Type */
  --gb-font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --gb-font-serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --gb-font-mono: ui-monospace, SFMono-Regular, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --gb-step--1: clamp(0.83rem, 0.80rem + 0.14vw, 0.92rem);
  --gb-step-0:  clamp(1.00rem, 0.96rem + 0.20vw, 1.12rem);
  --gb-step-1:  clamp(1.20rem, 1.12rem + 0.40vw, 1.45rem);
  --gb-step-2:  clamp(1.45rem, 1.30rem + 0.75vw, 1.95rem);
  --gb-step-3:  clamp(1.75rem, 1.48rem + 1.35vw, 2.60rem);
  --gb-step-4:  clamp(2.10rem, 1.60rem + 2.50vw, 3.60rem);

  /* Layout */
  --gb-content: 46rem;   /* reading column */
  --gb-wide:    72rem;   /* wide blocks   */
  --gb-full:    90rem;   /* page shell    */
  --gb-gutter:  clamp(1.15rem, 4vw, 2.5rem);

  --gb-radius:    14px;
  --gb-radius-sm: 8px;

  --gb-shadow: 0 1px 2px rgba(0,0,0,.5), 0 12px 34px -12px rgba(0,0,0,.7);
  --gb-ring:   0 0 0 1px var(--gb-border);

  --gb-ease: cubic-bezier(.22,.61,.36,1);
}

/* ==========================================================================
   2. Reset / base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body {
  margin: 0;
  background: var(--gb-bg);
  color: var(--gb-text);
  font-family: var(--gb-font-sans);
  font-size: var(--gb-step-0);
  line-height: 1.68;
  font-feature-settings: "kern" 1, "liga" 1, "cv05" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Subtle field texture — a nod to the original hero without the video weight */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58rem 34rem at 78% -8%, rgba(72,200,245,.13), transparent 62%),
    radial-gradient(46rem 30rem at 8% 4%, rgba(169,139,250,.10), transparent 60%);
}

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

img, svg, video, canvas { max-width: 100%; height: auto; display: block; }
img { border-radius: var(--gb-radius-sm); }

a {
  color: var(--gb-accent);
  text-decoration-color: color-mix(in srgb, var(--gb-accent) 38%, transparent);
  text-underline-offset: 3px;
  transition: color .18s var(--gb-ease), text-decoration-color .18s var(--gb-ease);
}
a:hover, a:focus-visible { color: var(--gb-accent-strong); text-decoration-color: currentColor; }

:focus-visible {
  outline: 2px solid var(--gb-accent-strong);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .55em;
  font-weight: 640;
  line-height: 1.16;
  letter-spacing: -0.022em;
  text-wrap: balance;
  color: #fff;
}
h1 { font-size: var(--gb-step-4); }
h2 { font-size: var(--gb-step-3); }
h3 { font-size: var(--gb-step-2); }
h4 { font-size: var(--gb-step-1); }
h5, h6 { font-size: var(--gb-step-0); letter-spacing: .04em; text-transform: uppercase; color: var(--gb-text-muted); }

p { margin: 0 0 1.15em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.35em; margin: 0 0 1.15em; }
li { margin-bottom: .4em; }
li::marker { color: var(--gb-accent-deep); }

blockquote {
  margin: 1.8em 0;
  padding: .2em 0 .2em 1.5rem;
  border-left: 2px solid var(--gb-accent-deep);
  color: var(--gb-text-muted);
  font-family: var(--gb-font-serif);
  font-size: var(--gb-step-1);
  font-style: italic;
  line-height: 1.55;
}
blockquote cite { display: block; margin-top: .7em; font-size: var(--gb-step--1); font-style: normal; color: var(--gb-text-faint); }

code, kbd, samp, pre { font-family: var(--gb-font-mono); font-size: .92em; }
code {
  background: var(--gb-surface);
  border: 1px solid var(--gb-border-soft);
  border-radius: 5px;
  padding: .12em .42em;
  color: var(--gb-violet-soft);
}
pre {
  background: var(--gb-bg-alt);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius-sm);
  padding: 1.15rem 1.3rem;
  overflow-x: auto;
  line-height: 1.6;
}
pre code { background: none; border: 0; padding: 0; color: inherit; }

hr {
  border: 0;
  height: 1px;
  margin: 3rem 0;
  background: linear-gradient(90deg, transparent, var(--gb-border), transparent);
}

table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: var(--gb-step--1); }
th, td { padding: .7rem .85rem; border-bottom: 1px solid var(--gb-border-soft); text-align: left; }
th { color: #fff; font-weight: 620; border-bottom-color: var(--gb-border); }

/* ==========================================================================
   3. Layout primitives
   ========================================================================== */

.gb-shell { width: min(100% - (var(--gb-gutter) * 2), var(--gb-full)); margin-inline: auto; }
.gb-wrap  { width: min(100% - (var(--gb-gutter) * 2), var(--gb-wide));  margin-inline: auto; }
.gb-read  { width: min(100% - (var(--gb-gutter) * 2), var(--gb-content)); margin-inline: auto; }

.gb-section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.gb-section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.gb-section--alt { background: linear-gradient(180deg, transparent, rgba(16,26,44,.55) 18%, rgba(16,26,44,.55) 82%, transparent); }

.screen-reader-text {
  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;
  z-index: 999;
  background: var(--gb-accent);
  color: #04121c;
  padding: .7rem 1.1rem;
  border-radius: 0 0 var(--gb-radius-sm) 0;
  font-weight: 640;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

/* Eyebrow / kicker */
.gb-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1.1rem;
  font-size: var(--gb-step--1);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gb-accent);
}
.gb-eyebrow::before {
  content: "";
  width: 1.9rem;
  height: 1px;
  background: linear-gradient(90deg, var(--gb-accent), transparent);
}

.gb-lede {
  font-size: var(--gb-step-1);
  line-height: 1.6;
  color: var(--gb-text-muted);
  max-width: 42ch;
}

/* ==========================================================================
   4. Header / navigation
   ========================================================================== */

.gb-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--gb-bg) 82%, transparent);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--gb-ease), background .25s var(--gb-ease);
}
.gb-header.is-stuck { border-bottom-color: var(--gb-border-soft); background: color-mix(in srgb, var(--gb-bg) 94%, transparent); }

.gb-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 4.5rem;
}

.gb-brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; color: #fff; flex-shrink: 0; }
.gb-brand img { max-height: 2.4rem; width: auto; border-radius: 0; }
.gb-brand__name { font-size: var(--gb-step-1); font-weight: 660; letter-spacing: -.02em; line-height: 1.1; }
.gb-brand__tagline { display: block; font-size: .72rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--gb-text-faint); }

.gb-nav ul { display: flex; align-items: center; gap: .35rem; list-style: none; margin: 0; padding: 0; }
.gb-nav li { margin: 0; }
.gb-nav a {
  display: block;
  padding: .5rem .85rem;
  border-radius: var(--gb-radius-sm);
  color: var(--gb-text-muted);
  font-size: var(--gb-step--1);
  font-weight: 560;
  letter-spacing: .01em;
  text-decoration: none;
  transition: color .18s var(--gb-ease), background .18s var(--gb-ease);
}
.gb-nav a:hover, .gb-nav a:focus-visible { color: #fff; background: var(--gb-surface); }
.gb-nav .current-menu-item > a,
.gb-nav .current_page_item > a,
.gb-nav .current-menu-parent > a { color: #fff; background: var(--gb-surface); }

.gb-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.7rem; height: 2.7rem;
  padding: 0;
  background: var(--gb-surface);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius-sm);
  color: var(--gb-text);
  cursor: pointer;
}
.gb-nav-toggle span { position: relative; display: block; width: 17px; height: 1.6px; background: currentColor; border-radius: 2px; transition: transform .22s var(--gb-ease), opacity .18s var(--gb-ease); }
.gb-nav-toggle span::before,
.gb-nav-toggle span::after { content: ""; position: absolute; left: 0; width: 17px; height: 1.6px; background: currentColor; border-radius: 2px; transition: transform .22s var(--gb-ease); }
.gb-nav-toggle span::before { top: -5.5px; }
.gb-nav-toggle span::after  { top: 5.5px; }
.gb-nav-toggle[aria-expanded="true"] span { background: transparent; }
.gb-nav-toggle[aria-expanded="true"] span::before { transform: translateY(5.5px) rotate(45deg); }
.gb-nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-5.5px) rotate(-45deg); }

@media (max-width: 860px) {
  .gb-nav-toggle { display: inline-flex; }
  .gb-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--gb-bg-alt);
    border-block: 1px solid var(--gb-border-soft);
    padding: .75rem var(--gb-gutter) 1.25rem;
    display: none;
  }
  .gb-nav.is-open { display: block; }
  .gb-nav ul { flex-direction: column; align-items: stretch; gap: .15rem; }
  .gb-nav a { padding: .8rem .9rem; font-size: var(--gb-step-0); }
}

/* ==========================================================================
   5. Buttons
   ========================================================================== */

.gb-btn,
.wp-block-button__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  padding: .82rem 1.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: var(--gb-step--1);
  font-weight: 640;
  letter-spacing: .015em;
  text-decoration: none;
  cursor: pointer;
  transition: transform .16s var(--gb-ease), box-shadow .2s var(--gb-ease), background .2s var(--gb-ease), border-color .2s var(--gb-ease), color .2s var(--gb-ease);
}
.gb-btn--primary,
.wp-block-button:not(.is-style-outline) .wp-block-button__link {
  background: linear-gradient(135deg, var(--gb-accent-strong), var(--gb-accent) 55%, var(--gb-accent-deep));
  color: #04121c;
  box-shadow: 0 8px 22px -10px rgba(72,200,245,.75);
}
.gb-btn--primary:hover,
.wp-block-button:not(.is-style-outline) .wp-block-button__link:hover {
  color: #04121c;
  transform: translateY(-1.5px);
  box-shadow: 0 14px 30px -10px rgba(72,200,245,.85);
}
.gb-btn--ghost,
.wp-block-button.is-style-outline .wp-block-button__link {
  background: transparent;
  border-color: var(--gb-border);
  color: var(--gb-text);
}
.gb-btn--ghost:hover,
.wp-block-button.is-style-outline .wp-block-button__link:hover {
  border-color: var(--gb-accent);
  color: #fff;
  background: rgba(72,200,245,.07);
  transform: translateY(-1.5px);
}
.gb-btn--sm { padding: .55rem 1.1rem; font-size: .82rem; }

.gb-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }

/* ==========================================================================
   6. Hero
   ========================================================================== */

.gb-hero {
  position: relative;
  padding-block: clamp(4rem, 12vw, 8.5rem);
  overflow: hidden;
}
.gb-hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(72,200,245,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(72,200,245,.055) 1px, transparent 1px);
  background-size: 4.5rem 4.5rem;
  mask-image: radial-gradient(58% 62% at 50% 34%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(58% 62% at 50% 34%, #000 25%, transparent 78%);
}
.gb-hero__inner { position: relative; z-index: 1; }
.gb-hero h1 { max-width: 15ch; margin-bottom: .4em; }
.gb-hero h1 em {
  font-style: normal;
  background: linear-gradient(115deg, var(--gb-accent-strong), var(--gb-violet-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.gb-hero .gb-lede { max-width: 48ch; font-size: clamp(1.05rem, .98rem + .45vw, 1.32rem); }

/* Metric strip */
.gb-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 1px;
  margin-top: clamp(3rem, 7vw, 4.5rem);
  background: var(--gb-border-soft);
  border: 1px solid var(--gb-border-soft);
  border-radius: var(--gb-radius);
  overflow: hidden;
}
.gb-metric { background: var(--gb-bg); padding: 1.4rem 1.5rem; }
.gb-metric__value { font-size: var(--gb-step-2); font-weight: 660; color: #fff; letter-spacing: -.03em; line-height: 1.1; }
.gb-metric__label { margin-top: .3rem; font-size: var(--gb-step--1); color: var(--gb-text-faint); }

/* ==========================================================================
   7. Cards
   ========================================================================== */

.gb-grid { display: grid; gap: 1.35rem; }
.gb-grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); }
.gb-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 16.5rem), 1fr)); }

.gb-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  background: linear-gradient(160deg, var(--gb-surface), var(--gb-bg-alt));
  border: 1px solid var(--gb-border-soft);
  border-radius: var(--gb-radius);
  transition: transform .22s var(--gb-ease), border-color .22s var(--gb-ease), box-shadow .22s var(--gb-ease);
}
a.gb-card, .gb-card--link { text-decoration: none; color: inherit; }
.gb-card:hover, .gb-card:focus-within {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--gb-accent) 45%, var(--gb-border));
  box-shadow: var(--gb-shadow);
}
.gb-card__icon {
  display: grid;
  place-items: center;
  width: 2.7rem; height: 2.7rem;
  margin-bottom: 1.1rem;
  border-radius: 10px;
  background: rgba(72,200,245,.11);
  border: 1px solid rgba(72,200,245,.24);
  color: var(--gb-accent);
}
.gb-card__icon svg { width: 1.35rem; height: 1.35rem; }
.gb-card :is(h2, h3, h4) { font-size: var(--gb-step-1); margin-bottom: .5rem; }
.gb-card p { color: var(--gb-text-muted); font-size: var(--gb-step--1); margin-bottom: 0; }
.gb-card__more { margin-top: 1.15rem; font-size: var(--gb-step--1); font-weight: 620; color: var(--gb-accent); }
.gb-card__more::after { content: " \2192"; transition: margin .18s var(--gb-ease); }
.gb-card:hover .gb-card__more::after { margin-left: .25rem; }

/* ==========================================================================
   8. Papers
   ========================================================================== */

.gb-papers { display: grid; gap: 1.1rem; margin-top: 2.5rem; list-style: none; padding: 0; }

.gb-paper {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .35rem 1.4rem;
  padding: 1.6rem 1.75rem;
  margin: 0;
  background: var(--gb-bg-alt);
  border: 1px solid var(--gb-border-soft);
  border-left: 2px solid var(--gb-accent-deep);
  border-radius: var(--gb-radius-sm);
  transition: border-color .2s var(--gb-ease), background .2s var(--gb-ease);
}
.gb-paper:hover { border-left-color: var(--gb-accent); background: var(--gb-surface); }
.gb-paper__index {
  grid-row: 1 / span 3;
  font-family: var(--gb-font-mono);
  font-size: var(--gb-step--1);
  color: var(--gb-text-faint);
  padding-top: .3rem;
}
.gb-paper__title { font-size: var(--gb-step-1); margin: 0 0 .35rem; }
.gb-paper__title a { color: #fff; text-decoration: none; }
.gb-paper__title a:hover { color: var(--gb-accent-strong); }
.gb-paper__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .9rem;
  margin-bottom: .6rem;
  font-size: var(--gb-step--1);
  color: var(--gb-text-faint);
}
.gb-paper__abstract { font-size: var(--gb-step--1); color: var(--gb-text-muted); margin: 0; }
.gb-paper__links { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }

.gb-tag {
  display: inline-block;
  padding: .22rem .65rem;
  border: 1px solid var(--gb-border);
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 580;
  letter-spacing: .045em;
  text-transform: uppercase;
  color: var(--gb-text-muted);
  text-decoration: none;
}
a.gb-tag:hover { border-color: var(--gb-accent); color: var(--gb-accent-strong); }
.gb-tag--pdf { border-color: rgba(72,200,245,.4); color: var(--gb-accent); }

@media (max-width: 620px) {
  .gb-paper { grid-template-columns: 1fr; padding: 1.3rem 1.25rem; }
  .gb-paper__index { grid-row: auto; padding-top: 0; }
}

/* ==========================================================================
   9. Entry / article content
   ========================================================================== */

.gb-entry-header { padding-block: clamp(3rem, 7vw, 5rem) clamp(1.5rem, 3vw, 2.5rem); }
.gb-entry-header h1 { max-width: 22ch; }
.gb-entry-meta { display: flex; flex-wrap: wrap; gap: .5rem 1.1rem; margin-top: 1.2rem; font-size: var(--gb-step--1); color: var(--gb-text-faint); }

.gb-content { padding-bottom: clamp(3rem, 7vw, 5rem); }
.gb-content > * { margin-inline: auto; width: min(100%, var(--gb-content)); }
.gb-content > .alignwide  { width: min(100%, var(--gb-wide)); }
.gb-content > .alignfull  { width: 100%; max-width: none; }
.gb-content h2 { margin-top: 2.4em; }
.gb-content h3 { margin-top: 1.9em; }
.gb-content figure { margin: 2.2rem auto; }
.gb-content figcaption { margin-top: .7rem; font-size: var(--gb-step--1); color: var(--gb-text-faint); text-align: center; }

/* Serif reading mode for long-form papers */
.gb-content--serif p,
.gb-content--serif li { font-family: var(--gb-font-serif); font-size: 1.09rem; line-height: 1.72; }

/* Abstract callout */
.gb-abstract {
  padding: 1.5rem 1.75rem;
  margin-bottom: 2.5rem;
  background: var(--gb-bg-alt);
  border: 1px solid var(--gb-border-soft);
  border-radius: var(--gb-radius-sm);
}
.gb-abstract h2 {
  margin: 0 0 .7rem;
  font-size: var(--gb-step--1);
  font-weight: 640;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--gb-accent);
}
.gb-abstract p { color: var(--gb-text-muted); margin-bottom: 0; }

/* ==========================================================================
   10. Math (KaTeX)
   ========================================================================== */

.katex { font-size: 1.06em; }
.katex-display {
  margin: 1.9rem 0;
  padding: .35rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}
.katex-display > .katex { color: var(--gb-text); }

/* ==========================================================================
   11. Contact / forms
   ========================================================================== */

.gb-contact { display: grid; gap: clamp(2rem, 5vw, 3.5rem); grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); align-items: start; }

.gb-contact__list { list-style: none; padding: 0; margin: 1.8rem 0 0; }
.gb-contact__list li { display: flex; align-items: center; gap: .8rem; margin-bottom: .95rem; font-size: var(--gb-step-0); }
.gb-contact__list svg { width: 1.05rem; height: 1.05rem; color: var(--gb-accent); flex-shrink: 0; }
.gb-contact__list a { color: var(--gb-text); text-decoration: none; }
.gb-contact__list a:hover { color: var(--gb-accent-strong); }

input[type="text"], input[type="email"], input[type="url"], input[type="search"], input[type="tel"], textarea, select {
  width: 100%;
  padding: .8rem 1rem;
  background: var(--gb-bg-alt);
  border: 1px solid var(--gb-border);
  border-radius: var(--gb-radius-sm);
  color: var(--gb-text);
  font-family: inherit;
  font-size: var(--gb-step-0);
  transition: border-color .18s var(--gb-ease), box-shadow .18s var(--gb-ease);
}
input::placeholder, textarea::placeholder { color: var(--gb-text-faint); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--gb-accent);
  box-shadow: 0 0 0 3px rgba(72,200,245,.16);
}
label { display: block; margin-bottom: .4rem; font-size: var(--gb-step--1); font-weight: 580; color: var(--gb-text-muted); }
.gb-field { margin-bottom: 1.1rem; }

/* ==========================================================================
   12. Footer
   ========================================================================== */

.gb-footer {
  margin-top: clamp(4rem, 9vw, 7rem);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
  border-top: 1px solid var(--gb-border-soft);
  background: linear-gradient(180deg, transparent, rgba(11,18,32,.85));
}
.gb-footer__top {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  padding-bottom: 2.5rem;
}
.gb-footer h2, .gb-footer h3 { font-size: var(--gb-step--1); letter-spacing: .13em; text-transform: uppercase; color: var(--gb-text-muted); margin-bottom: 1.1rem; font-weight: 640; }
.gb-footer p, .gb-footer li { font-size: var(--gb-step--1); color: var(--gb-text-muted); }
.gb-footer ul { list-style: none; padding: 0; margin: 0; }
.gb-footer li { margin-bottom: .55rem; }
.gb-footer a { color: var(--gb-text-muted); text-decoration: none; }
.gb-footer a:hover { color: var(--gb-accent-strong); }

.gb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--gb-border-soft);
  font-size: var(--gb-step--1);
  color: var(--gb-text-faint);
}

.gb-social { display: flex; gap: .5rem; }
.gb-social a {
  display: grid;
  place-items: center;
  width: 2.3rem; height: 2.3rem;
  border: 1px solid var(--gb-border);
  border-radius: 50%;
  color: var(--gb-text-muted);
  transition: border-color .18s var(--gb-ease), color .18s var(--gb-ease), transform .18s var(--gb-ease);
}
.gb-social a:hover { border-color: var(--gb-accent); color: var(--gb-accent-strong); transform: translateY(-2px); }
.gb-social svg { width: 1.05rem; height: 1.05rem; }

/* ==========================================================================
   13. WP core block / alignment support
   ========================================================================== */

.alignleft  { float: left;  margin: .3rem 1.6rem 1.2rem 0; }
.alignright { float: right; margin: .3rem 0 1.2rem 1.6rem; }
.aligncenter { margin-inline: auto; }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--gb-step--1); color: var(--gb-text-faint); text-align: center; }
.sticky, .gallery-caption, .bypostauthor { display: block; }

.wp-block-separator { border: 0; height: 1px; background: var(--gb-border); }
.wp-block-pullquote { border-block: 1px solid var(--gb-border); padding: 2rem 0; }
.wp-block-table td, .wp-block-table th { border-color: var(--gb-border-soft); }

.gb-pagination { display: flex; gap: .5rem; justify-content: center; margin-top: 3rem; }
.gb-pagination .page-numbers {
  display: grid; place-items: center;
  min-width: 2.4rem; height: 2.4rem; padding-inline: .6rem;
  border: 1px solid var(--gb-border); border-radius: var(--gb-radius-sm);
  color: var(--gb-text-muted); text-decoration: none;
}
.gb-pagination .page-numbers:hover,
.gb-pagination .page-numbers.current { border-color: var(--gb-accent); color: #fff; }

/* Reveal-on-scroll (progressive enhancement; no-JS shows everything) */
.gb-reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--gb-ease), transform .6s var(--gb-ease); }
.gb-reveal.is-visible { opacity: 1; transform: none; }
.no-js .gb-reveal { opacity: 1; transform: none; }

/* Print */
@media print {
  body::before, .gb-header, .gb-footer, .gb-actions, .gb-hero__grid { display: none !important; }
  body { background: #fff; color: #000; }
  a { color: #000; }
}

/* ==========================================================================
   14. Block-authored page bodies (homepage / papers intro)
   ========================================================================== */

.gb-blocks > * {
  width: min(100% - (var(--gb-gutter) * 2), var(--gb-wide));
  margin-inline: auto;
}
.gb-blocks > .gb-section,
.gb-blocks > .alignfull { width: 100%; max-width: none; }
.gb-blocks > .alignwide { width: min(100% - (var(--gb-gutter) * 2), var(--gb-wide)); }
.gb-blocks > .wp-block-group.gb-section { max-width: none; }
.gb-blocks .gb-wrap > * { max-width: none; }
.gb-blocks .wp-block-columns { gap: 1.35rem; }
.gb-blocks .gb-card > *:last-child { margin-bottom: 0; }
.gb-blocks .gb-section > .gb-wrap > .gb-eyebrow { display: inline-flex; }