/* ==========================================================================
   AIforE.org — Design System
   Palette: deep forest dark base + electric-green accent (#4AE87A)
   Fonts: system stack only (portable, no external font loads)
   ========================================================================== */

:root {
  --bg: #0b1210;
  --bg-alt: #0f1b16;
  --surface: #142622;
  --surface-2: #1a2f29;
  --border: rgba(255, 255, 255, 0.09);
  --text: #eef6f1;
  --text-muted: #a7c3b6;
  --text-faint: #6f8d80;
  --accent: #4ae87a;
  --accent-dark: #33c264;
  --accent-ink: #06140c;
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1180px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p {
  margin: 0 0 16px;
  color: var(--text-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

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

.btn-accent {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-accent:hover { background: var(--accent-dark); }

.btn-outline {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 12px 4px;
}
.btn-ghost:hover { color: var(--accent); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 18, 16, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.brand img { width: 32px; height: 32px; display: block; }
.brand .brand-for { color: var(--accent); font-style: italic; font-weight: 600; margin: 0 1px; }

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

.nav-links > li {
  position: relative;
}

.nav-links > li > a,
.nav-links > li > button {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text);
  background: none;
  border: none;
  font-family: var(--font);
  cursor: pointer;
}

.nav-links > li > a:hover,
.nav-links > li > button:hover,
.nav-links > li.open > button {
  background: var(--surface);
  color: var(--accent);
}

.caret { font-size: 0.6rem; opacity: 0.7; transform: translateY(1px); }

.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all 0.15s ease;
}

.nav-links > li:hover .dropdown,
.nav-links > li.open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown a {
  display: block;
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.dropdown a:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav-cta { margin-left: 6px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 8px 10px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 96px;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(74, 232, 122, 0.16), transparent),
    linear-gradient(180deg, #0c1613 0%, #0b1210 100%);
  border-bottom: 1px solid var(--border);
}

.hero::after {
  /* Placeholder for full-bleed photography — swap for a real image/video
     (per site outline: real photography > illustration on hero) */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 30%, rgba(74,232,122,0.08), transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(74,232,122,0.06), transparent 45%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 780px;
}

.hero p.lede {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 620px;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.photo-note {
  margin-top: 40px;
  display: inline-block;
  font-size: 0.78rem;
  color: var(--text-faint);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

/* ---------- News strip ---------- */
.news-strip {
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.news-strip .wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  flex-wrap: wrap;
}

.news-tag {
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  flex-shrink: 0;
}

.news-strip a.headline {
  color: var(--text);
  font-weight: 500;
  font-size: 0.94rem;
}
.news-strip a.headline:hover { color: var(--accent); }

/* ---------- Latest Insight teaser (homepage, mission area) ---------- */
.latest-insight {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.latest-insight .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 24px;
  flex-wrap: wrap;
}

.latest-insight .insight-tag {
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  flex-shrink: 0;
}

.latest-insight .insight-content {
  flex: 1;
  min-width: 240px;
}

.latest-insight a.insight-title {
  display: block;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.latest-insight a.insight-title:hover {
  color: var(--accent);
}

.latest-insight .insight-dek {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 6px;
}

.latest-insight .insight-byline {
  color: var(--text-faint);
  font-size: 0.82rem;
}

.latest-insight .insight-cta {
  flex-shrink: 0;
}

/* ---------- Sections ---------- */
section {
  padding: 88px 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.diagram-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.link-arrow {
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.link-arrow:hover { text-decoration: underline; }

/* ---------- Flagship spotlight ---------- */
.spotlight {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.spotlight .badge {
  display: inline-block;
  background: rgba(74, 232, 122, 0.12);
  color: var(--accent);
  border: 1px solid rgba(74, 232, 122, 0.3);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.calc-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.calc-row:last-child { border-bottom: none; }
.calc-row span:first-child { color: var(--text-muted); }
.calc-row span:last-child { color: var(--accent); font-weight: 700; font-family: ui-monospace, monospace; }

/* ---------- Credibility bar ---------- */
.quote-block {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.quote-block blockquote {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 18px;
  color: var(--text);
}

.quote-block cite {
  color: var(--text-faint);
  font-style: normal;
  font-size: 0.92rem;
}

.logo-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 44px;
  opacity: 0.6;
}

.logo-chip {
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 22px;
  font-size: 0.82rem;
  color: var(--text-faint);
}

/* ---------- Cards / grids ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover { border-color: rgba(74,232,122,0.35); transform: translateY(-2px); }

.card .tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 10px;
  display: block;
}

.card .date {
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-top: 14px;
  display: block;
}

.card-img {
  aspect-ratio: 16/9;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--surface-2), var(--bg-alt));
  border: 1px solid var(--border);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 0.75rem;
}

/* ---------- Team / people ---------- */
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 260px));
  justify-content: start;
  gap: 32px;
}

.person-photo {
  aspect-ratio: 1;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--surface-2), var(--bg-alt));
  border: 1px solid var(--border);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-size: 0.78rem;
  text-align: center;
  padding: 12px;
}

.person-name { font-weight: 700; margin-bottom: 2px; }
.person-role { color: var(--accent); font-size: 0.85rem; font-weight: 600; margin-bottom: 10px; }
.person-bio { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ---------- Newsletter ---------- */
.newsletter {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
}

.newsletter-form {
  display: flex;
  gap: 10px;
  max-width: 560px;
  margin: 24px auto 0;
  flex-wrap: wrap;
  justify-content: center;
}

.newsletter-form input {
  flex: 1;
  min-width: 160px;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.92rem;
}

.newsletter-form input::placeholder { color: var(--text-faint); }
.newsletter-form input:focus { outline: none; border-color: var(--accent); }

.form-note {
  font-size: 0.78rem;
  color: var(--text-faint);
  margin-top: 14px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  background: var(--bg-alt);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
  padding: 5px 0;
}
.footer-col a:hover { color: var(--accent); }

.footer-brand p { max-width: 280px; font-size: 0.9rem; }

.social-row {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.social-row a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.social-row a:hover { border-color: var(--accent); color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-faint);
}

.footer-bottom a { color: var(--text-faint); }
.footer-bottom a:hover { color: var(--accent); }

.legal-links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- Page header (interior pages) ---------- */
.page-header {
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #0c1613 0%, #0b1210 100%);
}

.page-header p.lede { max-width: 640px; font-size: 1.05rem; }

/* ---------- Divider (brand graphic slot) ---------- */
.leaf-divider {
  display: flex;
  justify-content: center;
  padding: 8px 0 0;
  opacity: 0.5;
}

/* ---------- Utility ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.stack { display: flex; flex-direction: column; gap: 6px; }
.placeholder-note {
  font-size: 0.78rem;
  color: var(--text-faint);
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 12px;
  margin-top: 10px;
}

/* ---------- Donate page ---------- */
.donate-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.impact-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.impact-stat {
  text-align: center;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
}

.impact-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}
.impact-stat .label { font-size: 0.82rem; color: var(--text-muted); }

.zeffy-slot {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 40px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.9rem;
}

.paypal-donate {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.paypal-donate h3 { margin-bottom: 6px; }

.paypal-qr {
  width: 160px;
  height: 160px;
  margin: 16px auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  padding: 8px;
}

.paypal-donate .btn { margin-top: 4px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .two-col, .spotlight, .footer-grid { grid-template-columns: 1fr; }
  .grid-3, .impact-row { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: 64px;
    right: 0;
    left: 0;
    bottom: 0;
    height: calc(100vh - 64px);
    z-index: 99;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.2s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links > li > a, .nav-links > li > button { width: 100%; justify-content: space-between; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; display: none; box-shadow: none; }
  .nav-links > li.open .dropdown { display: block; }
  .nav-cta { margin-left: 0; margin-top: 8px; }
  .hero { padding: 88px 0 64px; }
  .spotlight { padding: 32px; }
  .newsletter { padding: 32px; }
}