/* SibylData - Dark Mode (OLED) design system
   Pattern: Real-Time / Operations Landing. Font: system-ui (self-contained, no external calls -> GDPR-safe, fast). */

:root {
  --color-primary: #1E293B;
  --color-secondary: #334155;
  --color-accent: #22C55E;
  --color-accent-hover: #16A34A;
  --color-background: #0F172A;
  --color-foreground: #F8FAFC;
  --color-muted: #1E293B;
  --color-muted-2: #272F42;
  --color-text-dim: #94A3B8;
  --color-border: #334155;
  --color-border-strong: #475569;
  --color-destructive: #EF4444;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono", Consolas, monospace;

  --maxw: 1120px;
  --measure: 68ch;
  --radius: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0; font-family: var(--font);
  background: var(--color-background); color: var(--color-foreground);
  line-height: 1.65; font-size: 17px;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--color-accent); color: #04210F; padding: 10px 16px; font-weight: 700; }
.skip:focus { left: 12px; top: 12px; }

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }

/* Header / nav */
.site-header { position: sticky; top: 0; z-index: 100;
  background: rgba(15,23,42,.85); backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border); }
.nav { display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding: 14px 24px; max-width: var(--maxw); margin: 0 auto; }
.brand { font-weight: 800; font-size: 19px; letter-spacing: -.02em;
  color: var(--color-foreground); display: flex; align-items: center; gap: 9px; }
.brand:hover { text-decoration: none; }
.brand .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent); }
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; margin-left: auto; align-items: center; }
.nav-links a { color: var(--color-text-dim); font-size: 14.5px; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--color-foreground); text-decoration: none; }

/* Buttons */
.btn { display: inline-block; cursor: pointer; background: var(--color-accent); color: #04210F;
  font-weight: 700; font-size: 15.5px; padding: 12px 22px; border-radius: var(--radius); border: 0;
  transition: background 200ms ease, transform 150ms ease; }
.btn:hover { background: var(--color-accent-hover); color: #04210F; text-decoration: none; transform: translateY(-1px); }
.btn-lg { padding: 16px 30px; font-size: 17px; }
.btn-ghost { background: transparent; color: var(--color-foreground); border: 1px solid var(--color-border-strong); }
.btn-ghost:hover { background: var(--color-muted-2); color: var(--color-foreground); }

/* Sections */
.section { padding: 64px 0; border-bottom: 1px solid var(--color-border); }
.section:last-of-type { border-bottom: 0; }
.hero { padding: 84px 0 60px; }

h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.08; letter-spacing: -.03em;
  font-weight: 800; margin: 0 0 18px; max-width: 20ch; }
h2 { font-size: clamp(24px, 3.4vw, 32px); line-height: 1.18; letter-spacing: -.02em; font-weight: 700; margin: 0 0 14px; }
h3 { font-size: 20px; font-weight: 700; margin: 28px 0 8px; letter-spacing: -.01em; }
h4 { font-size: 16.5px; font-weight: 700; margin: 18px 0 6px; }
h5 { font-size: 12.5px; font-weight: 700; margin: 16px 0 4px; text-transform: uppercase;
  letter-spacing: .09em; color: var(--color-accent); }

p { margin: 0 0 16px; max-width: var(--measure); }
.lead { font-size: 20px; color: #E2E8F0; max-width: 58ch; }
.dim { color: var(--color-text-dim); }
.eyebrow { color: var(--color-accent); font-weight: 700; font-size: 13px;
  text-transform: uppercase; letter-spacing: .1em; margin: 0 0 14px; }
.kicker { color: var(--color-text-dim); font-size: 14px; margin-bottom: 12px; }
.kicker a { color: var(--color-text-dim); }

/* Trust strip */
.trust { display: flex; gap: 14px; flex-wrap: wrap; margin: 30px 0 6px; }
.trust .stat { background: var(--color-muted); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 14px 18px; min-width: 132px; }
.trust .num { font-family: var(--mono); font-size: 22px; font-weight: 700;
  color: var(--color-foreground); font-variant-numeric: tabular-nums; }
.trust .lbl { font-size: 12.5px; color: var(--color-text-dim); margin-top: 2px; }

/* Cards */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-top: 26px; }
.card { background: var(--color-muted); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 22px; transition: border-color 200ms ease, transform 200ms ease; }
.card:hover { border-color: var(--color-border-strong); transform: translateY(-2px); }
.card h3 { margin-top: 0; }
.card p { margin-bottom: 10px; font-size: 15.5px; }
.card a.more { font-weight: 600; font-size: 14.5px; }

/* Steps / slots */
.slots { display: grid; gap: 12px; margin: 22px 0; }
.slot { display: flex; gap: 14px; align-items: flex-start; background: var(--color-muted-2);
  border-left: 3px solid var(--color-accent); border-radius: 8px; padding: 14px 16px; }
.slot .k { font-family: var(--mono); color: var(--color-accent); font-weight: 700; font-size: 13px; white-space: nowrap; }
.slot div p { margin: 0; }

/* FAQ */
.faq details { border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 4px 18px; margin-bottom: 12px; background: var(--color-muted); }
.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; font-size: 16.5px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--color-accent); font-weight: 700; font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { padding-bottom: 14px; color: var(--color-text-dim); }

/* CTA band */
.cta-band { background: linear-gradient(135deg, #14233F 0%, #0F172A 100%);
  border: 1px solid var(--color-border-strong); border-radius: 16px; padding: 40px; text-align: center; margin-top: 8px; }
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { margin: 0 auto 24px; max-width: 50ch; color: var(--color-text-dim); }

/* Footer */
.site-footer { padding: 40px 0; color: var(--color-text-dim); font-size: 14px; }
.site-footer .container { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer a { color: var(--color-text-dim); }
.site-footer a:hover { color: var(--color-foreground); }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }

code { font-family: var(--mono); background: var(--color-muted-2); color: #BAE6C2;
  padding: 2px 6px; border-radius: 5px; font-size: .9em; }

@media (max-width: 720px) {
  .nav-links { gap: 12px; width: 100%; margin-left: 0; }
  .hero { padding: 56px 0 44px; }
  .section { padding: 48px 0; }
  .cta-band { padding: 28px 20px; }
  body { font-size: 16px; }
}