/* ==========================================================================
   OpenFold Consortium, Shared Design System
   Imported by every page. Mobile-first; breakpoint at 768px.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --color-bg: #0a0e1a;
  --color-surface: #131929;
  --color-border: #1e2d4a;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);

  /* Warm gray pulled from the OpenFold Ghost blog, used on the header + footer */
  --color-ghost-gray: #b4b1b1;
  --color-band: #23262d;
  --color-band-border: #393c44;

  --maxw: 1200px;
  --space: 1.5rem;
}

/* --- Reset ---------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 19px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* --- Layout helpers ------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--space);
}

main {
  flex: 1 0 auto;
}

.section {
  padding-block: 4rem;
}

.section--tight {
  padding-block: 2.5rem;
}

.section__head {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
  display: block;
}

.section h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  margin-bottom: 0.75rem;
}

.section__lead {
  color: var(--color-text-secondary);
  font-size: 1.25rem;
}

.text-secondary {
  color: var(--color-text-secondary);
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
}

.btn--ghost {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.btn--sm {
  padding: 0.55rem 1rem;
  font-size: 1rem;
}

.link-arrow {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.link-arrow::after {
  content: '\2192';
  transition: transform 0.18s ease;
}

.link-arrow:hover::after {
  transform: translateX(3px);
}

/* --- Badges --------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  background-color: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge--muted {
  background-color: rgba(148, 163, 184, 0.1);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

/* --- Cards ---------------------------------------------------------------- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card h3 {
  font-size: 1.4rem;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.card--hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--color-accent);
}

.card__footer {
  margin-top: auto;
}

/* Generic responsive grids */
.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Home, Hero
   ========================================================================== */
.hero {
  position: relative;
  padding-block: clamp(4rem, 12vw, 8rem);
  background:
    radial-gradient(1200px 500px at 70% -10%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(900px 600px at 0% 100%, rgba(37, 99, 235, 0.12), transparent 55%),
    var(--color-bg);
  overflow: hidden;
}

.hero__inner {
  max-width: 880px;
  margin-inline: auto;
  text-align: center;
}

/* Large, centered tagline logo */
.hero__logo {
  display: block;
  width: min(640px, 100%);
  height: auto;
  margin: 0 auto 1.75rem;
}

@media (max-width: 767px) {
  .hero__logo {
    margin-bottom: 1.25rem;
  }
}

.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero__sub {
  font-size: clamp(1.25rem, 2.8vw, 1.55rem);
  color: var(--color-text-secondary);
  margin: 0 auto 2rem;
  max-width: 680px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* Impact / stat bar */
.impact {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
}

.impact__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding-block: 2rem;
  text-align: center;
}

@media (min-width: 768px) {
  .impact__inner { grid-template-columns: repeat(3, 1fr); }
  .impact__item:not(:last-child) { border-right: 1px solid var(--color-border); }
}

.impact__stat {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.impact__label {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

/* News strip cards (home) */
.news-card__source,
.news-item__source {
  margin-bottom: 0.75rem;
}

.news-card h3 {
  font-size: 1.25rem;
}

/* ==========================================================================
   Members / logo grids
   ========================================================================== */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  align-items: stretch;
}

@media (min-width: 768px) {
  .logo-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .logo-grid { grid-template-columns: repeat(5, 1fr); }
}

.logo-grid--lg {
  gap: 1.25rem;
}

.logo-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background-color: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-height: 96px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.logo-cell:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.logo-cell img {
  max-height: 56px;
  width: auto;
  object-fit: contain;
}

.logo-grid--lg .logo-cell {
  min-height: 120px;
}

.logo-grid--lg .logo-cell img {
  max-height: 70px;
}

/* Founders / supporters smaller rows */
.logo-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .logo-row { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
}

/* ==========================================================================
   Contribute / 3-up CTA cards
   ========================================================================== */
.contribute-card ul {
  list-style: none;
  margin-bottom: 1.25rem;
}

.contribute-card li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.contribute-card li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ==========================================================================
   Banner / callout
   ========================================================================== */
.banner {
  background: linear-gradient(120deg, var(--color-accent), var(--color-accent-hover));
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
  color: #fff;
}

.banner h2 {
  color: #fff;
  margin-bottom: 0.75rem;
}

.banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 620px;
  margin: 0 auto 1.5rem;
}

.banner .btn--primary {
  background-color: #fff;
  color: var(--color-accent-hover);
}

.banner .btn--primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--color-accent-hover);
}

/* ==========================================================================
   Spotlight / events cards
   ========================================================================== */
.spotlight-card {
  position: relative;
  overflow: hidden;
}

.spotlight-card::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(400px 200px at 100% 0%, rgba(59, 130, 246, 0.12), transparent 70%);
}

/* ==========================================================================
   Team
   ========================================================================== */
.team-section + .team-section {
  margin-top: 3rem;
}

.team-section > h2 {
  font-size: 1.65rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .team-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .team-grid { grid-template-columns: repeat(4, 1fr); }
}

.person {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.person:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--color-accent);
}

.person__photo {
  width: 104px;
  height: 104px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
}

.person__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.person__name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.person__title {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.45;
  margin-bottom: 0.9rem;
}

.person__linkedin {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

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

.person__linkedin svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ==========================================================================
   News archive
   ========================================================================== */
.news-list {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .news-list { grid-template-columns: repeat(2, 1fr); }
}

.news-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.news-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--color-accent);
}

.news-item h2,
.news-item h3 {
  font-size: 1.3rem;
  margin-bottom: 0.6rem;
}

.news-item p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.news-item .card__footer {
  margin-top: auto;
}

/* ==========================================================================
   Resources tiles
   ========================================================================== */
.tile {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.4rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.tile:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.tile strong {
  color: var(--color-text-primary);
  font-size: 1.25rem;
}

.tile span {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

/* ==========================================================================
   Newsletter band
   ========================================================================== */
.newsletter {
  text-align: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
}

.newsletter h2 {
  margin-bottom: 0.75rem;
}

.newsletter p {
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 1.5rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  flex-shrink: 0;
  background-color: var(--color-band);
  border-top: 1px solid var(--color-band-border);
  padding-block: 2.5rem;
}

.site-footer__logo {
  height: 48px;
  width: auto;
  flex-shrink: 0;
}

/* Logo + tagline side-by-side in the footer's first column */
.site-footer__grid > div:first-child {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-footer__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr; }
}

.site-footer p,
.site-footer a {
  font-size: 1.05rem;
}

.site-footer p {
  color: var(--color-ghost-gray);
  max-width: 36ch;
}

.site-footer h4 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ghost-gray);
  margin-bottom: 0.9rem;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--color-band-border);
  color: var(--color-ghost-gray);
}

.footer-social a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.footer-social img {
  width: 18px;
  height: 18px;
}

.site-footer__bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-band-border);
  text-align: center;
  color: var(--color-ghost-gray);
  font-size: 1rem;
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.stack > * + * { margin-top: 1rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.center { text-align: center; }
.mono { font-family: var(--font-mono); }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* ==========================================================================
   Contact modal
   ========================================================================== */
.contact-modal[hidden] { display: none; }

.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.contact-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
}

.contact-modal__dialog {
  position: relative;
  width: 100%;
  max-width: 440px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  text-align: center;
  animation: contact-pop 0.18s ease-out;
}

@keyframes contact-pop {
  from { transform: translateY(8px) scale(0.98); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.contact-modal__dialog h3 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.contact-modal__dialog > p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.contact-modal__close {
  position: absolute;
  top: 0.75rem;
  right: 0.9rem;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
}

.contact-modal__close:hover { color: var(--color-text-primary); }

.contact-modal__email {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.25rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
}

.contact-modal__address {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-text-primary);
  word-break: break-all;
}

/* ==========================================================================
   Newsletter modal (inline PDF viewer)
   ========================================================================== */
.newsletter-modal[hidden] { display: none; }

.newsletter-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.newsletter-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
}

.newsletter-modal__dialog {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 960px;
  height: 90vh;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: contact-pop 0.18s ease-out;
}

.newsletter-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.newsletter-modal__head h3 {
  font-size: 1.3rem;
  margin: 0;
}

.newsletter-modal__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.newsletter-modal__close {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
}

.newsletter-modal__close:hover { color: var(--color-text-primary); }

.newsletter-modal__frame {
  flex: 1;
  width: 100%;
  border: none;
  background-color: var(--color-bg);
}