/* ==========================================================
   Global Citizen Science Partnership — site stylesheet
   Design tokens
   ========================================================== */
:root{
  --ink:        #0e2733;   /* deep teal-navy — night-sky / global */
  --ink-2:      #123240;
  --panel:      #17404f;
  --paper:      #f6f1e2;   /* warm parchment — field notebook */
  --paper-2:    #efe7d2;
  --text-on-ink:   #eaf1ee;
  --text-on-ink-dim: #a9c2c2;
  --text-on-paper: #1c2a25;
  --text-on-paper-dim: #5a6b62;
  --accent:     #e2a63c;   /* sextant gold */
  --accent-2:   #4c9c86;   /* muted field green */
  --line-ink:   rgba(234,241,238,.14);
  --line-paper: rgba(28,42,37,.14);
  --maxw: 1180px;
  --radius: 3px;
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--paper);
  color: var(--text-on-paper);
  font-family: var(--font-body);
  line-height: 1.65;
  font-size: 17px;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 .5em;
}
p{ margin: 0 0 1.1em; }
.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.eyebrow{
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 14px;
  display: block;
}
.visually-hidden{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------------- Header ---------------- */
header.site-header{
  background: var(--ink);
  color: var(--text-on-ink);
  border-bottom: 1px solid var(--line-ink);
  position: relative;
  z-index: 20;
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  padding-top: 16px; padding-bottom: 16px; gap: 20px;
}
.brand{ display:flex; align-items:center; gap:12px; text-decoration:none; }
.brand svg{ width: 40px; height: 40px; flex: none; }
.brand .wordmark{
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--text-on-ink);
  line-height: 1.15;
}
.brand .wordmark small{
  display:block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .09em;
  color: var(--text-on-ink-dim);
  font-weight: 400;
  text-transform: uppercase;
  margin-top: 2px;
}

nav.primary-nav ul{
  list-style:none; display:flex; gap: 28px; margin:0; padding:0;
}
nav.primary-nav a{
  text-decoration:none;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--text-on-ink-dim);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
nav.primary-nav a:hover,
nav.primary-nav a[aria-current="page"]{
  color: var(--text-on-ink);
  border-bottom-color: var(--accent);
}

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line-ink); color:var(--text-on-ink);
  border-radius: var(--radius); padding: 8px 12px; font-size: 14px; cursor:pointer;
  font-family: var(--font-body);
}

@media (max-width: 780px){
  nav.primary-nav{
    position:absolute; top:100%; left:0; right:0;
    background: var(--ink); border-bottom: 1px solid var(--line-ink);
    max-height: 0; overflow:hidden; transition: max-height .25s ease;
  }
  nav.primary-nav.open{ max-height: 320px; }
  nav.primary-nav ul{ flex-direction:column; gap:0; padding: 8px 24px 18px; }
  nav.primary-nav a{ display:block; padding: 12px 0; border-bottom: 1px solid var(--line-ink); }
  .nav-toggle{ display:inline-block; }
}

/* ---------------- Hero ---------------- */
.hero{
  background: var(--ink);
  color: var(--text-on-ink);
  padding: 72px 0 60px;
  overflow: hidden;
}
.hero .container{
  display:grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items:center;
}
.hero h1{ font-size: clamp(34px, 4.4vw, 54px); color:#fff; }
.hero .lede{ font-size: 18px; color: var(--text-on-ink-dim); max-width: 46ch; }
.hero-actions{ display:flex; gap:14px; margin-top: 28px; flex-wrap:wrap; }
.btn{
  display:inline-block; font-family: var(--font-body); font-size:14px; font-weight:600;
  padding: 12px 22px; border-radius: var(--radius); text-decoration:none;
  letter-spacing:.02em;
}
.btn-primary{ background: var(--accent); color: var(--ink); }
.btn-primary:hover{ background:#eab758; }
.btn-ghost{ border:1px solid var(--line-ink); color: var(--text-on-ink); }
.btn-ghost:hover{ border-color: var(--accent); color: var(--accent); }

.hero-diagram{ width:100%; height:auto; }

/* ---------------- Sections ---------------- */
section{ padding: 74px 0; }
section.on-ink{ background: var(--ink); color: var(--text-on-ink); }
section.on-paper-2{ background: var(--paper-2); }

.section-head{ max-width: 640px; margin: 0 0 40px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }

/* Stat row */
.stat-row{ display:grid; grid-template-columns: repeat(3,1fr); gap: 28px; margin-top: 40px; }
.stat{ border-top: 2px solid var(--accent); padding-top: 14px; }
.stat .num{ font-family: var(--font-mono); font-size: 30px; font-weight:600; }
.stat .label{ font-size: 14px; color: var(--text-on-paper-dim); }
section.on-ink .stat .label{ color: var(--text-on-ink-dim); }

@media (max-width: 780px){
  .hero .container{ grid-template-columns: 1fr; }
  .stat-row{ grid-template-columns: 1fr; }
  .hero-diagram{ max-width: 340px; margin: 0 auto; }
}

/* Card grid */
.card-grid{
  display:grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 10px;
}
@media (max-width: 780px){ .card-grid{ grid-template-columns: 1fr; } }

.card{
  background: var(--paper); border: 1px solid var(--line-paper); border-radius: var(--radius);
  padding: 28px; height: 100%;
}
section.on-ink .card{ background: var(--panel); border-color: var(--line-ink); color: var(--text-on-ink); }
.card .tag{
  font-family: var(--font-mono); font-size: 11px; letter-spacing:.1em; text-transform:uppercase;
  color: var(--accent-2); display:block; margin-bottom:10px;
}
section.on-ink .card .tag{ color: var(--accent); }
.card h3{ font-size: 20px; margin-bottom: 10px; }
.card p{ font-size: 15px; color: var(--text-on-paper-dim); margin-bottom: 0; }
section.on-ink .card p{ color: var(--text-on-ink-dim); }

/* Network badges */
.badge-list{ display:flex; flex-wrap:wrap; gap: 10px; margin-top: 24px; }
.badge{
  font-family: var(--font-mono); font-size: 13px; padding: 8px 14px;
  border: 1px solid var(--line-paper); border-radius: 999px; color: var(--text-on-paper);
  background: var(--paper);
}

/* CTA band */
.cta-band{ background: var(--accent); color: var(--ink); text-align:center; }
.cta-band h2{ color: var(--ink); }
.cta-band .btn-primary{ background: var(--ink); color: #fff; }
.cta-band .btn-primary:hover{ background:#08202b; }

/* Timeline (news / history) */
.timeline{ border-left: 2px solid var(--line-paper); padding-left: 26px; margin-top: 30px; }
.timeline-item{ position:relative; padding-bottom: 34px; }
.timeline-item:last-child{ padding-bottom:0; }
.timeline-item::before{
  content:""; position:absolute; left:-32px; top:4px; width:10px; height:10px;
  border-radius:50%; background: var(--accent);
}
.timeline-date{ font-family: var(--font-mono); font-size: 12px; color: var(--text-on-paper-dim); letter-spacing:.06em; }
.timeline-item h3{ font-size: 19px; margin: 4px 0 8px; }

/* Contact */
.contact-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items:start; }
@media (max-width: 780px){ .contact-grid{ grid-template-columns: 1fr; } }
.contact-detail{ margin-bottom: 22px; }
.contact-detail .label{
  font-family: var(--font-mono); font-size:11px; text-transform:uppercase; letter-spacing:.1em;
  color: var(--accent-2); display:block; margin-bottom:6px;
}
.contact-detail a{ text-decoration:none; border-bottom: 1px solid var(--line-paper); }
.map-frame{ border:1px solid var(--line-paper); border-radius: var(--radius); overflow:hidden; }
.map-frame iframe{ width:100%; height: 340px; border:0; display:block; }

/* Breadcrumb / page intro (inner pages) */
.page-hero{ background: var(--ink); color: var(--text-on-ink); padding: 56px 0 48px; }
.page-hero h1{ color:#fff; font-size: clamp(28px, 4vw, 40px); }
.page-hero p{ color: var(--text-on-ink-dim); max-width: 62ch; font-size: 17px; }

/* Footer */
footer.site-footer{ background: var(--ink); color: var(--text-on-ink-dim); padding: 50px 0 30px; }
.footer-grid{ display:grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 40px; }
@media (max-width: 780px){ .footer-grid{ grid-template-columns: 1fr; gap:28px; } }
.footer-grid h4{
  font-family: var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.1em;
  color: var(--text-on-ink); margin-bottom: 14px; font-weight:600;
}
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom: 8px; font-size: 14.5px; }
.footer-grid a{ text-decoration:none; color: var(--text-on-ink-dim); }
.footer-grid a:hover{ color: var(--accent); }
.footer-bottom{
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line-ink);
  font-size: 13px; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}