/* =========================================================================
   Neumann Design System — Ecosystem layer (public site distribution)
   Source of truth: /neumann-design-system/  ·  Build: 2026-06-29 (v1)
   Additive only. Loads AFTER styles.css and reuses its tokens
   (--ember, --steel, --ink, --surface, --line, --ease …).
   Adds: cross-project AI-Stack nav, "Local AI Stack" section,
   footer AI links, and progressive cross-document page transitions.
   ========================================================================= */

/* -- Design-system token aliases (canonical --jn-* names map to live tokens) */
:root {
  --jn-bg: var(--bg);
  --jn-surface: var(--surface);
  --jn-surface-glass: rgba(11, 18, 25, .72);
  --jn-ink: var(--ink);
  --jn-ink-muted: var(--ink-soft);
  --jn-border: var(--line);
  --jn-accent: var(--ember);
  --jn-accent-2: var(--steel);
  --jn-ok: var(--ok);
  --jn-warn: var(--warn);
  --jn-danger: var(--danger);
  --jn-radius-md: var(--radius-lg);
  --jn-shadow-lift: 0 22px 54px rgba(0, 0, 0, .5);
  --jn-glow-accent: 0 0 26px rgba(232, 116, 54, .20);
  --jn-ease: var(--ease);
  --jn-ease-out: var(--ease-out);
  --jn-dur-fast: .18s;
  --jn-dur: .32s;
}

/* =========================================================================
   1 · Cross-document View Transitions (progressive enhancement)
   ========================================================================= */
@view-transition { navigation: auto; }
.site-header { view-transition-name: jn-site-header; }
.site-footer { view-transition-name: jn-site-footer; }
@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) { animation: none !important; }
}

/* =========================================================================
   2 · AI-Stack navigation (desktop dropdown + mobile disclosure)
   ========================================================================= */
.nav-ai { position: relative; display: inline-flex; align-items: center; }
.nav-ai-btn {
  position: relative; min-height: 42px; display: inline-flex; align-items: center; gap: .34rem;
  padding: .5rem .8rem; color: var(--ink-dim); font-size: .92rem; font-weight: 550;
  border-radius: 5px; transition: color .25s var(--ease);
}
.nav-ai-btn:hover, .nav-ai-btn:focus-visible, .nav-ai[data-open="true"] .nav-ai-btn { color: var(--ink); }
.nav-ai-caret { width: 15px; height: 15px; transition: transform .3s var(--ease); }
.nav-ai:hover .nav-ai-caret,
.nav-ai[data-open="true"] .nav-ai-caret { transform: rotate(180deg); }

.nav-ai-menu {
  position: absolute; inset-block-start: calc(100% + .35rem); inset-inline-end: 0;
  min-width: 16rem; padding: .5rem; display: grid; gap: .15rem; z-index: 130;
  background: var(--jn-surface-glass); backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid var(--line-2); border-radius: 12px;
  box-shadow: var(--jn-shadow-lift);
  opacity: 0; transform: translateY(-8px) scale(.985); transform-origin: top right;
  pointer-events: none; visibility: hidden;
  transition: opacity .26s var(--ease), transform .26s var(--ease-out), visibility 0s linear .26s;
}
.nav-ai:hover .nav-ai-menu,
.nav-ai[data-open="true"] .nav-ai-menu {
  opacity: 1; transform: none; pointer-events: auto; visibility: visible;
  transition: opacity .26s var(--ease), transform .26s var(--ease-out);
}
.nav-ai-menu a {
  position: relative; display: grid; gap: .05rem; padding: .58rem .7rem;
  border-radius: 8px; text-decoration: none; color: var(--ink-dim);
  font-size: .94rem; font-weight: 600; line-height: 1.2;
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.nav-ai-menu a span { font-size: .74rem; font-weight: 500; color: var(--ink-soft); letter-spacing: .01em; }
.nav-ai-menu a::after { content: none; }
.nav-ai-menu a:hover, .nav-ai-menu a:focus-visible {
  background: rgba(143, 178, 199, .10); color: var(--ink); transform: translateX(2px);
}
.nav-ai-menu a:hover span, .nav-ai-menu a:focus-visible span { color: var(--ink-dim); }
.nav-ai-menu a[aria-current="page"] { color: var(--ember); }

/* =========================================================================
   3 · Local AI Stack section (homepage)
   ========================================================================= */
.eco-grid {
  display: grid; gap: 1.1rem; margin-top: 2.2rem;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
}
.eco-card {
  position: relative; display: flex; flex-direction: column; gap: .9rem;
  padding: 1.5rem 1.45rem 1.35rem; border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line); overflow: hidden; isolation: isolate;
  transition: transform .4s var(--ease-out), border-color .3s var(--ease), box-shadow .4s var(--ease);
}
.eco-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--ember), var(--steel)); opacity: .85;
  transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease-out);
}
.eco-card::after {
  content: ""; position: absolute; inset-block-start: -40%; inset-inline-end: -30%;
  width: 60%; height: 80%; z-index: -1; border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 116, 54, .16), transparent 70%);
  opacity: 0; transition: opacity .5s var(--ease);
}
.eco-card-head { display: flex; align-items: center; justify-content: space-between; gap: .6rem; }
.eco-num { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .22em; color: var(--ink-soft); }
.eco-status {
  display: inline-flex; align-items: center; gap: .4rem; padding: .26rem .6rem;
  border-radius: 999px; border: 1px solid rgba(118, 181, 138, .35);
  background: rgba(118, 181, 138, .10); color: var(--ok);
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .16em; text-transform: uppercase;
}
.eco-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 0 rgba(118, 181, 138, .6); }
.eco-card h3 { font-size: 1.22rem; margin: 0; letter-spacing: -0.01em; }
.eco-card p { margin: 0; color: var(--ink-soft); font-size: .94rem; line-height: 1.55; }
.eco-tags { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: auto; }
.eco-tag {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .04em;
  padding: .26rem .55rem; border-radius: 6px; color: var(--ink-dim);
  background: rgba(143, 178, 199, .08); border: 1px solid var(--line);
}
.eco-link {
  display: inline-flex; align-items: center; gap: .45rem; margin-top: .3rem;
  color: var(--ink); font-weight: 600; font-size: .92rem; text-decoration: none;
}
.eco-link .ico { width: 18px; height: 18px; transition: transform .3s var(--ease); }
.eco-card:hover .eco-link .ico, .eco-link:focus-visible .ico { transform: translateX(4px); }

@media (hover: hover) and (pointer: fine) {
  .eco-card:hover {
    transform: translateY(-5px); border-color: rgba(232, 116, 54, .35);
    box-shadow: var(--jn-shadow-lift), var(--jn-glow-accent);
  }
  .eco-card:hover::before { transform: scaleX(1); }
  .eco-card:hover::after { opacity: 1; }
}
.eco-card:focus-within::before { transform: scaleX(1); }

/* =========================================================================
   4 · Footer — AI-Stack group label
   ========================================================================= */
.footer-nav .footer-ai-label {
  width: 100%; margin-top: .4rem; padding: 0 .55rem;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .22em;
  text-transform: uppercase; color: var(--ink-soft); opacity: .8;
}

/* =========================================================================
   5 · Responsive — mobile sheet disclosure for AI-Stack
   ========================================================================= */
@media (max-width: 860px) {
  .nav-ai { display: block; }
  .nav-ai-btn { width: 100%; min-height: 50px; justify-content: space-between; font-size: 1.05rem; }
  .nav-ai-menu {
    position: static; min-width: 0; inset: auto; margin: .2rem 0 .4rem; padding: .2rem .2rem .2rem .5rem;
    background: rgba(143, 178, 199, .05); border: none; border-inline-start: 2px solid var(--line);
    border-radius: 0; box-shadow: none; opacity: 1; transform: none; visibility: hidden;
    display: none; pointer-events: auto; transition: none;
  }
  /* on touch we rely on explicit toggle only, never hover */
  .nav-ai:hover .nav-ai-menu { display: none; }
  .nav-ai[data-open="true"] .nav-ai-menu,
  .nav-ai[data-open="true"]:hover .nav-ai-menu { display: grid; visibility: visible; }
  .nav-ai-menu a { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .eco-card, .eco-card::before, .eco-card::after, .nav-ai-menu, .nav-ai-caret,
  .eco-link .ico { transition: none !important; }
  .eco-card:hover { transform: none; }
}

/* =========================================================================
   5b · Business layer (2026-07-05) — hero value line, NDS band, contact panels
   ========================================================================= */
.hero-lead {
  max-width: 34rem; margin-top: 1.05rem;
  color: var(--ink-dim); font-size: clamp(1rem, 1.4vw, 1.13rem); line-height: 1.62;
}

.biz-band {
  position: relative; display: grid; gap: 2rem; align-items: center;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  padding: clamp(1.8rem, 4vw, 3rem); border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--surface-2), var(--surface) 62%);
  border: 1px solid var(--line); overflow: hidden; isolation: isolate;
}
.biz-band::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--ember), var(--steel)); opacity: .85;
}
.biz-band::after {
  content: ""; position: absolute; inset-block-end: -55%; inset-inline-end: -18%;
  width: 55%; height: 110%; z-index: -1; border-radius: 50%;
  background: radial-gradient(circle, rgba(127, 176, 205, .10), transparent 70%);
}
.biz-band h2 { margin: .35rem 0 0; font-size: clamp(1.55rem, 3vw, 2.15rem); letter-spacing: -0.015em; }
.biz-band .lead { margin-top: .9rem; }
.biz-points { list-style: none; margin: 0; padding: 0; display: grid; gap: .65rem; }
.biz-points li {
  position: relative; padding: .8rem .95rem .8rem 2.15rem; border-radius: 10px;
  background: rgba(143, 178, 199, .06); border: 1px solid var(--line);
  color: var(--ink-dim); font-size: .95rem; line-height: 1.5;
}
.biz-points li strong { color: var(--ink); }
.biz-points li::before {
  content: ""; position: absolute; inset-block-start: 1.18rem; inset-inline-start: .95rem;
  width: .55rem; height: .55rem; border-radius: 2px;
  background: linear-gradient(135deg, var(--ember), var(--steel));
}
.biz-band .hero-actions { margin-top: 1.4rem; }
@media (max-width: 900px) {
  .biz-band { grid-template-columns: minmax(0, 1fr); gap: 1.4rem; }
}

.contact-panels {
  display: grid; gap: 1.1rem; margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
}

/* =========================================================================
   6 · Local AI Runtime page helpers (eco-status variant, breadcrumbs, pipeline)
   ========================================================================= */
.eco-status-local { color: var(--steel); border-color: rgba(127, 176, 205, .35); background: rgba(127, 176, 205, .10); }
.eco-status-local .dot { background: var(--steel); box-shadow: none; }

.eco-breadcrumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: .45rem;
  margin-bottom: 1.4rem; font-size: .82rem; color: var(--ink-soft);
}
.eco-breadcrumbs a { color: var(--ink-soft); text-decoration: none; }
.eco-breadcrumbs a:hover, .eco-breadcrumbs a:focus-visible { color: var(--ink); }
.eco-breadcrumbs span[aria-current="page"] { color: var(--ink-dim); font-weight: 600; }
.eco-breadcrumbs span[aria-hidden="true"] { opacity: .55; }

.rt-pipeline {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: .8rem; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  counter-reset: rt;
}
.rt-pipeline li {
  position: relative; counter-increment: rt;
  padding: 1rem 1.1rem 1rem 2.6rem; border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line); display: grid; gap: .2rem;
}
.rt-pipeline li::before {
  content: counter(rt, decimal-leading-zero); position: absolute; inset-block-start: 1rem; inset-inline-start: 1rem;
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; color: var(--ember);
}
.rt-pipeline li strong { color: var(--ink); font-size: 1.02rem; }
.rt-pipeline li span { color: var(--ink-soft); font-size: .86rem; }