/* ═══════════════════════════════════════════════════════════════════
   AITHERIUM FOUNDATION — aitherium.org
   Traditional web page: light paper, ink type, serif display, one
   dignified accent. Deliberately NOT the dark Living-OS chrome of
   aitherium.com — a foundation site reads as a document, not an OS.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --paper: #faf9f7;
  --paper-deep: #f2f0ec;
  --card: #ffffff;
  --ink: #1c1b18;
  --ink-soft: #4a473f;
  --ink-faint: #8a857a;
  --rule: #e4e0d8;
  --rule-strong: #d3cec4;
  --accent: #1f4fd8;          /* dignified blue */
  --accent-deep: #163a9e;
  --accent-soft: #e8edfb;
  --gold: #b7791f;            /* warm gold for giving */
  --gold-soft: #f7efe0;
  --ok: #1d7a4e;

  --serif: Georgia, 'Iowan Old Style', 'Palatino Linotype', 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --measure: 66ch;
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ─────────────────────────────────────────────────── */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 4.5vw, 3.3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h3 { font-size: 1.22rem; }

p { max-width: var(--measure); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.serif { font-family: var(--serif); }
.lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 60ch;
}
.muted { color: var(--ink-soft); }
.small { font-size: 0.9rem; }
.tiny { font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-faint); font-weight: 600; }

/* ── Layout ─────────────────────────────────────────────────────── */

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

section { padding: 72px 0; }
section.alt { background: var(--paper-deep); }
section.dark { background: #16150f; color: #efece3; }

.section-head { max-width: var(--measure); margin-bottom: 40px; }
.section-head .tiny { display: block; margin-bottom: 10px; }
.section-head h2 { margin-bottom: 12px; }
.section-head p { color: var(--ink-soft); }

/* ── Header / nav ───────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky; top: 0; z-index: 50;
}
.nav-row {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--ink); font-family: var(--serif); font-size: 1.15rem; font-weight: 600;
}
.brand:hover { text-decoration: none; }
.brand .mark { width: 30px; height: 30px; flex-shrink: 0; }
.brand .org-suffix { color: var(--ink-faint); font-size: 0.85rem; font-family: var(--sans); font-weight: 500; }

.nav-links {
  display: flex; align-items: center; gap: 26px;
  list-style: none;
}
.nav-links a { color: var(--ink-soft); font-size: 0.95rem; font-weight: 500; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }

/* ── Buttons ────────────────────────────────────────────────────── */

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { text-decoration: none; }

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

.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: #9a6518; }

.btn-outline { border-color: var(--rule-strong); color: var(--ink); background: transparent; }
.btn-outline:hover { border-color: var(--ink); background: var(--paper-deep); }

.btn-ghost-light { border-color: rgba(255,255,255,.35); color: #efece3; background: transparent; }
.btn-ghost-light:hover { border-color: #fff; background: rgba(255,255,255,.08); }

/* ── Hero ───────────────────────────────────────────────────────── */

.hero { padding: 96px 0 88px; border-bottom: 1px solid var(--rule); }
.hero .container { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center; }
.hero h1 { margin: 18px 0 20px; }
.hero .lede { margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-seal { justify-self: end; text-align: center; }
.hero-seal svg { width: 200px; height: 200px; }
.hero-seal .tiny { display: block; margin-top: 10px; }

/* ── Stats strip ────────────────────────────────────────────────── */

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; padding: 40px 0; border-bottom: 1px solid var(--rule);
}
.stat .num { font-family: var(--serif); font-size: 2.1rem; font-weight: 600; color: var(--accent-deep); }
.stat .label { color: var(--ink-soft); font-size: 0.92rem; }

/* ── Cards / grids ──────────────────────────────────────────────── */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 30px;
  display: flex; flex-direction: column; gap: 12px;
}
.card h3 { font-size: 1.15rem; }
.card p { color: var(--ink-soft); font-size: 0.95rem; }
.card .card-link { margin-top: auto; font-size: 0.92rem; font-weight: 600; }
.card .kicker { font-family: var(--serif); font-size: 1.7rem; line-height: 1; color: var(--accent-deep); }

/* ── Principles list ────────────────────────────────────────────── */

.principles { list-style: none; display: flex; flex-direction: column; gap: 26px; }
.principles li { display: grid; grid-template-columns: 44px 1fr; gap: 18px; }
.principles .n {
  font-family: var(--serif); font-size: 1.15rem; font-weight: 600;
  color: var(--accent-deep); background: var(--accent-soft);
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.principles h3 { margin-bottom: 4px; font-size: 1.12rem; }
.principles p { color: var(--ink-soft); }

/* ── CTA band ───────────────────────────────────────────────────── */

.cta-band {
  background: var(--accent-deep);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}
.cta-band h2 { margin-bottom: 12px; }
.cta-band p { margin: 0 auto 28px; color: rgba(255,255,255,.82); }
.cta-band .btn-gold { font-size: 1.05rem; padding: 14px 32px; }

/* ── Footer ─────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--rule);
  background: var(--paper-deep);
  padding: 56px 0 36px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 44px;
}
.footer-grid h4 { font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 14px; }
.footer-grid ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.footer-grid a { color: var(--ink-soft); font-size: 0.92rem; }
.footer-grid a:hover { color: var(--ink); }
.footer-blurb { color: var(--ink-soft); font-size: 0.92rem; max-width: 34ch; margin-top: 14px; }
.footer-bottom {
  border-top: 1px solid var(--rule);
  padding-top: 22px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  color: var(--ink-faint); font-size: 0.82rem;
}
.footer-bottom .mark { width: 22px; height: 22px; vertical-align: -6px; margin-right: 6px; }

/* ── Page headers (interior) ────────────────────────────────────── */

.page-head { padding: 64px 0 40px; border-bottom: 1px solid var(--rule); }
.page-head h1 { margin-bottom: 14px; }
.page-head .lede { margin-bottom: 0; }

/* ── News list ──────────────────────────────────────────────────── */

.news-list { list-style: none; display: flex; flex-direction: column; }
.news-list li {
  padding: 22px 0; border-bottom: 1px solid var(--rule);
  display: grid; grid-template-columns: 140px 1fr; gap: 20px; align-items: baseline;
}
.news-list .date { color: var(--ink-faint); font-size: 0.85rem; font-family: var(--serif); font-style: italic; }
.news-list h3 { font-size: 1.1rem; margin-bottom: 4px; }
.news-list p { color: var(--ink-soft); font-size: 0.93rem; }

/* ── Tables (transparency) ──────────────────────────────────────── */

table.data { width: 100%; border-collapse: collapse; background: var(--card); }
table.data th, table.data td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--rule); font-size: 0.95rem; }
table.data th { background: var(--paper-deep); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); }
table.data td:last-child, table.data th:last-child { text-align: right; }

/* ── Responsive ─────────────────────────────────────────────────── */

@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .hero .container { grid-template-columns: 1fr; gap: 36px; }
  .hero-seal { justify-self: start; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links {
    display: none;
    position: absolute; top: 68px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .nav-toggle { display: block; }
  .news-list li { grid-template-columns: 1fr; gap: 4px; }
  .hero { padding: 64px 0; }
  section { padding: 56px 0; }
}