/* CSI Website Design System v1.0 */
:root {
  --bg: #07101f;
  --bg-alt: #0a1425;
  --panel: #101a2d;
  --text: #f4f5fb;
  --muted: #b7bfd4;
  --line: rgba(255,255,255,.11);
  --accent: #8b5cf6;
  --accent-soft: rgba(139,92,246,.16);
  --success: #39a96b;
  --warning: #d39a35;
  --future: #7f8aa3;
  --max: 1180px;
  --radius: 1rem;
  --space-1: .5rem;
  --space-2: .75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --shadow: 0 22px 60px rgba(0,0,0,.22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
.container { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7,16,31,.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.nav-wrap, .footer-grid {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.nav-wrap { min-height: 76px; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; }
.brand-mark {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%;
  background: linear-gradient(145deg, var(--accent), #5b21b6);
  font-size: .78rem; font-weight: 800; letter-spacing: .08em;
}
.brand-name { font-weight: 700; }
.site-nav { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: .93rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); }

.hero, .section, .cta, .site-footer { background: var(--bg); }
.hero {
  padding: clamp(5rem, 10vw, 8.5rem) 0 5rem;
  background: radial-gradient(circle at 75% 20%, rgba(139,92,246,.18), transparent 32rem), var(--bg);
}
.hero-grid, .two-column {
  display: grid; grid-template-columns: minmax(0,1.25fr) minmax(280px,.75fr);
  gap: clamp(2.5rem,6vw,6rem); align-items: start;
}
.eyebrow {
  margin: 0 0 1rem; color: #a78bfa; font-size: .76rem; font-weight: 800;
  letter-spacing: .18em; text-transform: uppercase;
}
h1 { max-width: 900px; margin: 0; font-size: clamp(2.8rem,6vw,5.5rem); line-height: .99; letter-spacing: -.045em; }
h2 { margin: 0 0 1.5rem; font-size: clamp(2rem,4vw,3.45rem); line-height: 1.08; letter-spacing: -.03em; }
h3 { margin: .7rem 0 .55rem; line-height: 1.25; }
.lead, .section-intro { max-width: 800px; color: var(--muted); font-size: clamp(1.08rem,2vw,1.3rem); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: .8rem 1.2rem; border: 1px solid transparent; border-radius: .75rem;
  text-decoration: none; font-weight: 700;
}
.button-primary { background: var(--accent); color: white; }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,.03); }

.panel, .card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(255,255,255,.05), rgba(255,255,255,.018));
}
.panel { padding: 1.5rem; box-shadow: var(--shadow); }
.card { padding: 1.4rem; }
.card p, .prose, .muted { color: var(--muted); }
.card-label, .roadmap-status {
  color: #a78bfa; font-size: .74rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
}
.summary-list { display: grid; gap: 1rem; margin: 0; }
.summary-list div { padding-top: 1rem; border-top: 1px solid var(--line); }
.summary-list div:first-child { padding-top: 0; border-top: 0; }
.summary-list dt { color: var(--muted); font-size: .8rem; }
.summary-list dd { margin: .35rem 0 0; }

.section { padding: clamp(4.5rem,8vw,7rem) 0; }
.alt-section { background: var(--bg-alt); border-block: 1px solid var(--line); }
.prose { font-size: 1.05rem; line-height: 1.82; }
.definition-callout {
  padding: 1.4rem 1.5rem; border-left: 3px solid var(--accent);
  background: var(--accent-soft); color: var(--muted); font-size: 1.08rem; line-height: 1.75;
}
.card-grid { display: grid; gap: 1rem; margin-top: 2.2rem; }
.card-grid.three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.numbered span { color: #a78bfa; font-weight: 800; }
.tag-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.tag-grid div { padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: .8rem; background: rgba(255,255,255,.025); }

.cta {
  padding: 5.5rem 0; text-align: center;
  background: radial-gradient(circle at center, rgba(139,92,246,.16), transparent 28rem), var(--bg-alt);
  border-top: 1px solid var(--line);
}
.cta p:not(.eyebrow) { max-width: 690px; margin: 0 auto 1.7rem; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0; }
.site-footer a { color: var(--muted); }

.integrity-list { display: grid; gap: 1rem; padding: 0; list-style: none; }
.integrity-list li { padding: 1.15rem 1.2rem; border: 1px solid var(--line); border-radius: .8rem; background: rgba(255,255,255,.025); }

@media (max-width: 900px) {
  .hero-grid, .two-column { grid-template-columns: 1fr; }
  .card-grid.three { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 650px) {
  .nav-wrap, .footer-grid { align-items: flex-start; flex-direction: column; padding-block: 1rem; }
  .site-nav { gap: .75rem 1rem; }
  .brand-name { font-size: .92rem; }
  .card-grid.three, .tag-grid { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.45rem,13vw,4rem); }
}


/* Framework page components */
.framework-sequence {
  display: grid;
  grid-template-columns: repeat(11, auto);
  gap: .7rem;
  align-items: stretch;
  margin-top: 2.5rem;
}

.framework-stage {
  width: min(100%, 210px);
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(255,255,255,.05), rgba(255,255,255,.018));
}

.stage-number {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: #c4b5fd;
  font-weight: 800;
}

.stage-arrow {
  align-self: center;
  color: var(--accent);
  font-size: 1.4rem;
}

@media (max-width: 1100px) {
  .framework-sequence {
    grid-template-columns: 1fr;
  }

  .framework-stage {
    width: auto;
  }

  .stage-arrow {
    justify-self: center;
    transform: rotate(90deg);
  }
}