/* Reason4X — reason4x.com | a Next Orion LLC product
   Static-first, near-zero JS. Distinctive "governed systems" aesthetic. */

:root {
  --bg: #0a0d12;
  --bg-elev: #10151d;
  --bg-card: #0e131b;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e9edf2;
  --muted: #9aa7b4;
  --faint: #6a7683;
  --accent: #38e6c4;      /* signal teal */
  --accent-ink: #05221c;
  --amber: #f4b860;       /* single warm accent, used sparingly */
  --maxw: 1120px;
  --radius: 14px;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* faint hairline grid — the "governed structure" motif */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 100% 4.5rem, 4.5rem 100%;
  background-position: center top;
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

img, svg { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); font-weight: 650; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand .mark { width: 30px; height: 30px; }
.brand b { font-size: 1.12rem; }
.brand .tld { color: var(--faint); font-weight: 500; font-family: var(--mono); font-size: .8rem; }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--muted); font-size: .95rem; }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav .btn { margin-left: 4px; }
@media (max-width: 720px) { .nav a.navlink { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: .95rem; line-height: 1;
  padding: 12px 18px; border-radius: 10px; border: 1px solid var(--line-strong);
  color: var(--text); background: transparent; cursor: pointer; transition: .18s ease;
}
.btn:hover { border-color: var(--accent); color: var(--text); text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { box-shadow: 0 8px 30px -8px color-mix(in oklab, var(--accent) 60%, transparent); }

/* ---------- eyebrow / labels ---------- */
.eyebrow {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 18px;
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--accent); display: inline-block; }

/* ---------- hero ---------- */
.hero { padding: clamp(64px, 12vw, 132px) 0 clamp(48px, 8vw, 96px); border-bottom: 1px solid var(--line); }
.hero h1 {
  font-size: clamp(2.4rem, 6.4vw, 4.3rem); line-height: 1.03; letter-spacing: -0.03em;
  margin: 0 0 24px; font-weight: 680; max-width: 15ch;
}
.hero h1 .hl { color: var(--accent); }
.hero .lead { font-size: clamp(1.05rem, 2.4vw, 1.35rem); color: var(--muted); max-width: 60ch; margin: 0 0 34px; }
.hero .cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero .note { margin-top: 22px; color: var(--faint); font-size: .9rem; font-family: var(--mono); }

/* ---------- section scaffold ---------- */
section { padding: clamp(56px, 9vw, 104px) 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 62ch; margin-bottom: 46px; }
.section-head h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); letter-spacing: -0.02em; line-height: 1.1; margin: 0 0 14px; font-weight: 650; }
.section-head p { color: var(--muted); margin: 0; font-size: 1.08rem; }

/* ---------- pillar grid ---------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: linear-gradient(180deg, var(--bg-card), color-mix(in oklab, var(--bg-card) 82%, #000));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px 28px;
  transition: border-color .18s ease, transform .18s ease;
}
.card:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.card .idx { font-family: var(--mono); font-size: .74rem; color: var(--faint); letter-spacing: .1em; }
.card h3 { font-size: 1.16rem; margin: 12px 0 10px; letter-spacing: -0.01em; }
.card p { color: var(--muted); font-size: .98rem; margin: 0; }

/* ---------- steps ---------- */
.steps { display: grid; gap: 0; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 780px) { .steps { grid-template-columns: 1fr; } }
.step { padding: 30px 26px; border-right: 1px solid var(--line); background: var(--bg-card); }
.steps .step:last-child { border-right: none; }
@media (max-width: 780px) { .step { border-right: none; border-bottom: 1px solid var(--line); } .steps .step:last-child { border-bottom: none; } }
.step .n { font-family: var(--mono); color: var(--accent); font-size: .8rem; letter-spacing: .1em; }
.step h3 { margin: 14px 0 8px; font-size: 1.14rem; }
.step p { color: var(--muted); margin: 0; font-size: .97rem; }

/* ---------- statement band ---------- */
.band { background: var(--bg-elev); }
.band .wrap { text-align: center; }
.band .eyebrow { justify-content: center; }
.band h2 { font-size: clamp(1.8rem, 4.6vw, 2.9rem); letter-spacing: -0.025em; line-height: 1.12; margin: 0 auto 28px; max-width: 20ch; font-weight: 660; }
.band .cta-row { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ---------- prose (privacy / terms) ---------- */
.prose { max-width: 760px; margin: 0 auto; padding: clamp(48px, 8vw, 88px) 0; }
.prose h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -0.025em; margin: 0 0 8px; }
.prose .updated { color: var(--faint); font-family: var(--mono); font-size: .82rem; margin: 0 0 40px; }
.prose h2 { font-size: 1.35rem; margin: 44px 0 12px; letter-spacing: -0.01em; padding-top: 8px; border-top: 1px solid var(--line); }
.prose h3 { font-size: 1.08rem; margin: 26px 0 8px; color: var(--text); }
.prose p, .prose li { color: var(--muted); }
.prose a { color: var(--accent); }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose .callout {
  background: color-mix(in oklab, var(--amber) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--amber) 40%, transparent);
  border-radius: 10px; padding: 14px 18px; color: var(--text); font-size: .95rem; margin: 24px 0;
}
.prose .confirm { color: var(--amber); font-family: var(--mono); font-size: .85em; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 46px 0 40px; background: var(--bg); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.site-footer .brand b { font-size: 1rem; }
.site-footer .cols { display: flex; gap: 56px; flex-wrap: wrap; }
.site-footer h4 { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--faint); margin: 0 0 12px; font-weight: 600; }
.site-footer a { color: var(--muted); font-size: .95rem; display: block; margin: 7px 0; }
.site-footer a:hover { color: var(--text); text-decoration: none; }
.legal { margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--faint); font-size: .85rem; }
.legal .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 404 ---------- */
.center-screen { min-height: 70vh; display: grid; place-content: center; text-align: center; gap: 16px; }
.center-screen h1 { font-size: clamp(2.4rem, 8vw, 5rem); margin: 0; letter-spacing: -.03em; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }