/*
Language: CSS
Purpose: Public product website presentation for Responsibility Pathway Runtime.
Boundary: Static presentation only; it does not change runtime authorization or verification semantics.
*/
:root {
  color-scheme: dark;
  --bg: #07111f;
  --surface: rgba(18, 35, 58, 0.78);
  --surface-strong: #10253e;
  --text: #f7fbff;
  --muted: #b7c7d9;
  --accent: #7ce7d4;
  --accent-2: #8eb8ff;
  --warning: #ffd27a;
  --line: rgba(190, 220, 255, 0.18);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 8%, rgba(124, 231, 212, 0.16), transparent 34rem),
    radial-gradient(circle at 86% 14%, rgba(142, 184, 255, 0.16), transparent 30rem),
    linear-gradient(160deg, #07111f 0%, #091828 48%, #06101b 100%);
  line-height: 1.65;
}
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { color: #b8fff2; }
.skip-link { position: absolute; left: -999px; top: 1rem; }
.skip-link:focus { left: 1rem; z-index: 99; padding: .7rem 1rem; background: #fff; color: #000; border-radius: .7rem; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  background: rgba(7, 17, 31, .82); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .75rem; font-weight: 800; letter-spacing: .02em; }
.brand-mark { width: 2.3rem; height: 2.3rem; display: grid; place-items: center; border: 1px solid var(--line); border-radius: .8rem; background: linear-gradient(145deg, rgba(124,231,212,.22), rgba(142,184,255,.18)); }
nav { display: flex; flex-wrap: wrap; gap: .9rem; }
nav a { color: var(--muted); text-decoration: none; font-weight: 650; }
nav a:hover, nav a:focus-visible { color: var(--text); }
main { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.hero { min-height: 78vh; display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: clamp(2rem, 6vw, 5rem); padding: clamp(4rem, 9vw, 8rem) 0; }
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: .16em; text-transform: uppercase; font-size: .78rem; }
h1 { font-size: clamp(3rem, 8vw, 6.8rem); line-height: .94; letter-spacing: -.055em; margin: .7rem 0 1.5rem; max-width: 10ch; }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.05; letter-spacing: -.035em; margin: 0 0 1rem; }
h3 { margin: 0 0 .65rem; font-size: 1.15rem; }
.lead { color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.35rem); max-width: 65ch; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: .75rem 1.1rem; border-radius: .85rem; border: 1px solid var(--line); text-decoration: none; font-weight: 800; }
.button.primary { color: #04151b; background: linear-gradient(135deg, var(--accent), #9ff5e8); }
.button.secondary { color: var(--text); background: rgba(255,255,255,.04); }
.status-card, .card, pre { background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
.status-card { border-radius: 1.4rem; padding: 1.4rem; }
.status-row { display: flex; justify-content: space-between; gap: 1rem; padding: .72rem 0; border-bottom: 1px solid var(--line); }
.status-row:last-child { border-bottom: 0; }
.status-row span:first-child { color: var(--muted); }
.badge { display: inline-flex; align-items: center; gap: .4rem; border-radius: 999px; padding: .35rem .65rem; border: 1px solid var(--line); background: rgba(124,231,212,.08); font-size: .86rem; font-weight: 800; }
section { padding: clamp(3.5rem, 8vw, 7rem) 0; border-top: 1px solid var(--line); }
.section-intro { color: var(--muted); max-width: 70ch; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.card { border-radius: 1.15rem; padding: 1.25rem; }
.card p, .card li { color: var(--muted); }
.pathway { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: .65rem; margin-top: 2rem; }
.pathway div { position: relative; padding: 1rem; border-radius: .9rem; border: 1px solid var(--line); background: rgba(255,255,255,.035); text-align: center; font-weight: 800; }
.pathway div:not(:last-child)::after { content: "→"; position: absolute; right: -.7rem; top: 50%; transform: translateY(-50%); color: var(--accent); z-index: 2; }
pre { overflow-x: auto; padding: 1.2rem; border-radius: 1rem; color: #d9fff7; }
.notice { border-left: .25rem solid var(--warning); padding: 1rem 1.2rem; background: rgba(255,210,122,.08); border-radius: .35rem .9rem .9rem .35rem; }
.site-footer { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 2.5rem 0 4rem; color: var(--muted); border-top: 1px solid var(--line); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 820px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .grid { grid-template-columns: 1fr; }
  .pathway { grid-template-columns: 1fr; }
  .pathway div:not(:last-child)::after { content: "↓"; right: 50%; top: auto; bottom: -.95rem; transform: translateX(50%); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}