/* AVA Hub website UI kit — page-level layout (composes DS tokens) */

.site { background: var(--bg-page); overflow-x: hidden; }
.site section { position: relative; }

/* ---- Nav ---- */
.nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-5);
  padding: 0.85rem var(--container-pad);
  background: rgba(7, 10, 20, 0.7);
  backdrop-filter: blur(var(--blur-md)); -webkit-backdrop-filter: blur(var(--blur-md));
  border-bottom: 1px solid var(--border-subtle);
}
.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__link { font-size: var(--text-sm); color: var(--text-muted); transition: color var(--dur-fast) var(--ease-out); cursor: pointer; }
.nav__link:hover { color: var(--text-heading); }
.nav__link--active { color: var(--accent); }
.nav__right { display: flex; align-items: center; gap: var(--space-4); }
.nav__menu { display: none; }
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__right .nav-cta-secondary { display: none; }
}

/* ---- Shared section frame ---- */
.section-pad { padding-block: var(--section-y); }
.section-head { max-width: 720px; display: flex; flex-direction: column; gap: var(--space-4); }
.section-head h2 { font-size: var(--text-h1); }
.section-head .lead { font-size: var(--text-lead); color: var(--text-muted); }
.section-head--center { margin-inline: auto; text-align: center; align-items: center; }

/* ---- Hero ---- */
.hero { padding-block: clamp(5rem, 12vw, 9rem) var(--section-y); text-align: center; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: var(--gradient-halo);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0.5;
  background-image: linear-gradient(var(--border-subtle) 1px, transparent 1px), linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(70% 55% at 50% 35%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 55% at 50% 35%, #000 0%, transparent 75%);
}
.hero__inner { position: relative; display: flex; flex-direction: column; align-items: center; gap: var(--space-5); }
.hero h1 { font-size: var(--text-display-1); max-width: 16ch; }
.hero .lead { font-size: var(--text-lead); color: var(--text-muted); max-width: 56ch; }
.hero__actions { display: flex; gap: var(--space-3); flex-wrap: wrap; justify-content: center; margin-top: var(--space-2); }
.hero__trust { display: flex; gap: var(--space-6); flex-wrap: wrap; justify-content: center; margin-top: var(--space-6); color: var(--text-faint); }
.hero__trust span { display: inline-flex; align-items: center; gap: 0.5rem; font-size: var(--text-sm); }
.hero__trust svg { color: var(--accent); }

/* ---- Ecosystem diagram ---- */
.eco { display: grid; grid-template-columns: 1fr; gap: var(--space-7); }
.eco__diagram {
  position: relative; display: grid; gap: var(--space-5);
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 760px) { .eco__diagram { grid-template-columns: 1fr; } }
.eco__node {
  position: relative; z-index: 1;
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--surface); padding: var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-3);
  box-shadow: var(--edge-light);
}
.eco__node h3 { font-size: var(--text-h3); }
.eco__node p { font-size: var(--text-sm); color: var(--text-muted); }
.eco__icon { width: 46px; height: 46px; border-radius: var(--radius-md); display: grid; place-items: center; border: 1px solid var(--border-accent); background: var(--info-bg); color: var(--accent); }
.eco__backbone {
  margin-top: var(--space-5); border: 1px dashed var(--master-border); border-radius: var(--radius-lg);
  background: var(--master-bg); padding: var(--space-5);
  display: flex; align-items: center; gap: var(--space-4);
}
.eco__backbone .eco__icon { border-color: var(--master-border); background: rgba(155,140,255,0.16); color: var(--master-500); }
.eco__backbone h3 { font-size: var(--text-h4); color: var(--text-heading); }
.eco__backbone p { font-size: var(--text-sm); color: var(--text-muted); }

/* ---- Product section ---- */
.product { padding-block: var(--section-y); border-top: 1px solid var(--border-subtle); }
.product__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-8); align-items: start; }
@media (max-width: 920px) { .product__grid { grid-template-columns: 1fr; gap: var(--space-6); } }
.product__intro { display: flex; flex-direction: column; gap: var(--space-4); position: sticky; top: 90px; }
.product__name { font-size: var(--text-display-2); line-height: 1; }
.product__name b { font-weight: 500; color: var(--accent); }
.product__tagline { font-size: var(--text-h3); color: var(--text-heading); font-family: var(--font-display); font-weight: 400; }
.product__blurb { color: var(--text-muted); font-size: var(--text-body-lg); }
.product__diff {
  position: relative; border: 1px solid var(--border); border-left: 2px solid var(--accent);
  border-radius: var(--radius-md); background: var(--info-bg);
  padding: var(--space-4) var(--space-5); display: flex; flex-direction: column; gap: var(--space-2);
}
.product__diff-label { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-kicker); text-transform: uppercase; color: var(--accent); font-weight: 500; }
.product__diff p { color: var(--text-muted); font-size: var(--text-sm); line-height: 1.6; }
.product__statrow { display: flex; gap: var(--space-7); margin-top: var(--space-2); }
.product__modules { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 540px) { .product__modules { grid-template-columns: 1fr; } .product__intro { position: static; } }
.product__glow { position: absolute; inset-inline: 0; top: 0; height: 360px; pointer-events: none;
  background: radial-gradient(50% 100% at 20% 0%, var(--info-bg) 0%, transparent 70%); }

/* ---- Capabilities ---- */
.caps__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-top: var(--space-7); }
@media (max-width: 920px) { .caps__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .caps__grid { grid-template-columns: 1fr; } }

/* ---- About ---- */
.about__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8); align-items: center; }
@media (max-width: 860px) { .about__grid { grid-template-columns: 1fr; gap: var(--space-6); } }
.about__stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.about__stats .ava-card { display: flex; flex-direction: column; gap: var(--space-2); }

/* ---- Contact CTA ---- */
.cta {
  position: relative; overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius-2xl);
  background: linear-gradient(180deg, var(--ink-850), var(--ink-900));
  padding: clamp(2.5rem, 6vw, 5rem);
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-8); align-items: center;
}
@media (max-width: 860px) { .cta { grid-template-columns: 1fr; } }
.cta::before { content: ""; position: absolute; inset: 0; background: var(--gradient-halo); pointer-events: none; }
.cta__copy { position: relative; display: flex; flex-direction: column; gap: var(--space-4); }
.cta__copy h2 { font-size: var(--text-h1); }
.cta__form { position: relative; display: flex; flex-direction: column; gap: var(--space-4); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-5); box-shadow: var(--shadow-lg); }
.cta__form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 540px) { .cta__form-row { grid-template-columns: 1fr; } }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border-subtle); padding-block: var(--space-7) var(--space-6); }
.footer__top { display: flex; justify-content: space-between; gap: var(--space-7); flex-wrap: wrap; }
.footer__cols { display: flex; gap: var(--space-8); flex-wrap: wrap; }
.footer__col { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__col h4 { font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: var(--tracking-kicker); text-transform: uppercase; color: var(--text-faint); font-weight: 500; }
.footer__col a { font-size: var(--text-sm); color: var(--text-muted); }
.footer__col a:hover { color: var(--text-heading); }
.footer__bar { display: flex; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--border-subtle); color: var(--text-faint); font-size: var(--text-sm); }

/* ---- Entrance animation ---- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
  .reveal.is-in { opacity: 1; transform: none; }
}