/* Landing page (docs/index.html) — layers on shared.css + presentation/presentation.css */

/* ── Hero image slot ──
   Placeholder until the designed hero lands in assets/hero.png (2560×1280).
   When the image arrives: replace .hero-art contents with
   <img src="assets/hero.png" alt="Achilles" /> — the rule below sizes it. */
.hero-art {
  margin: 0 auto 2.5rem;
  max-width: 640px;
}

.hero-art img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
}

/* ── Hub scheme ── */
.hub-vis {
  display: block;
  width: 100%;
  max-width: 560px;
  margin: 2rem auto 0.5rem;
}

/* ── Navigation cards ── */
.nav-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin: 2rem 0 1rem;
}

.nav-card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 1.2rem 1.35rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  transition:
    transform 0.15s,
    box-shadow 0.15s,
    border-color 0.15s;
}

.nav-card:hover {
  transform: translateY(var(--link-hover-lift));
  box-shadow: var(--link-shadow-hover);
  border-color: var(--accent);
}

.nav-card__kicker {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.nav-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: var(--heading-spacing);
  margin-bottom: 0.3rem;
}

.nav-card__text {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.nav-card__arrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin-top: 0.55rem;
}

/* ── Pillars (two-line what-it-is strip) ── */
.pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin: 2rem 0 0.5rem;
}

.pillar {
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.pillar__title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.pillar__text {
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.55;
}

/* ── Footer meta ── */
.meta-line {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2rem;
}

.meta-line a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.meta-line a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

@media (max-width: 640px) {
  .nav-cards,
  .pillars {
    grid-template-columns: 1fr;
  }
}