/* sentinelcyber.io: self-hosted fonts, no third-party requests */
@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("/assets/fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 500; font-display: swap; src: url("/assets/fonts/inter-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("/assets/fonts/inter-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 700; font-display: swap; src: url("/assets/fonts/inter-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url("/assets/fonts/jetbrains-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url("/assets/fonts/jetbrains-mono-latin-500-normal.woff2") format("woff2"); }

:root {
  --bg-0: #090C11;
  --bg-1: #0E131A;
  --bg-2: #141B24;
  --line: #1F2833;
  --ink-0: #E9EDF2;
  --ink-1: #B4BECB;
  --ink-2: #7F8A99;
  --signal: #6EE7C8;      /* Sentinel */
  --signal-dim: #2C6B5C;
  --aegis: #93A8FF;       /* Aegis */
  --warn: #F2B866;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --maxw: 1160px;
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-0);
  color: var(--ink-0);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p { margin: 0; }
a { color: inherit; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(20px, 4vw, 48px); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(9, 12, 17, 0.82); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand__mark { width: 28px; height: 28px; color: var(--signal); }
.brand__name { font-weight: 700; letter-spacing: -0.01em; font-size: 18px; }
.brand__sub { font-family: var(--mono); font-size: 13px; color: var(--ink-2); margin-left: -4px; }
.nav__links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.nav__links a:not(.btn) { color: var(--ink-1); text-decoration: none; }
.nav__links a:not(.btn):hover { color: var(--ink-0); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 22px; border-radius: 999px;
  background: var(--signal); color: #06120F;
  font-weight: 600; font-size: 15px; text-decoration: none;
  transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); background: #8DF0D6; }
.btn--ghost { background: transparent; color: var(--ink-0); box-shadow: inset 0 0 0 1px var(--line); }
.btn--ghost:hover { background: var(--bg-2); }
.btn--small { padding: 9px 16px; font-size: 14px; }

/* Hero */
.hero {
  padding: clamp(80px, 12vw, 150px) 0 clamp(64px, 9vw, 110px);
  background:
    radial-gradient(ellipse 60% 50% at 85% 0%, rgba(110, 231, 200, 0.10), transparent 70%),
    radial-gradient(ellipse 50% 40% at 100% 30%, rgba(147, 168, 255, 0.08), transparent 70%),
    linear-gradient(transparent 0 calc(100% - 1px), var(--line) 0) 0 0 / 100% 64px,
    var(--bg-0);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--signal);
}
.eyebrow--aegis { color: var(--aegis); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px rgba(110, 231, 200, 0.18); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(110, 231, 200, 0); } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none; } html { scroll-behavior: auto; } .btn { transition: none; } }
h1 {
  margin-top: 22px;
  font-size: clamp(42px, 7vw, 84px); line-height: 1.03; letter-spacing: -0.035em; font-weight: 700;
}
.lede { margin-top: 26px; max-width: 62ch; font-size: clamp(17px, 1.6vw, 20px); color: var(--ink-1); }
.cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }

/* Signal strip */
.signal { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-1); }
.signal__inner { display: flex; align-items: center; gap: clamp(20px, 4vw, 48px); padding-top: 32px; padding-bottom: 32px; }
.signal__num { font-family: var(--mono); font-weight: 500; font-size: clamp(34px, 5vw, 52px); color: var(--warn); letter-spacing: -0.02em; white-space: nowrap; }
.signal__text { color: var(--ink-1); max-width: 70ch; font-size: 16px; }
.signal__text a { color: var(--ink-2); }

/* Sections */
.section { padding: clamp(72px, 10vw, 120px) 0; }
.section--alt { background: var(--bg-1); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { margin-top: 16px; font-size: clamp(30px, 4.2vw, 48px); line-height: 1.1; letter-spacing: -0.025em; font-weight: 700; max-width: 22ch; }
.section__lede { margin-top: 20px; max-width: 64ch; color: var(--ink-1); }
.grid3, .grid4 { display: grid; gap: 16px; margin-top: 44px; }
.grid3 { grid-template-columns: repeat(3, 1fr); }
.grid4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; }
.card p { margin-top: 10px; color: var(--ink-1); font-size: 15.5px; }
.card__num { font-family: var(--mono); font-size: 13px; color: var(--signal); margin-top: 0 !important; margin-bottom: 14px; }
.card--aegis { border-top: 2px solid var(--aegis); }
.card--plain { background: transparent; }
#who .grid3 { margin-top: 20px; }

/* Pilot */
.pilot { background: radial-gradient(ellipse 70% 80% at 0% 100%, rgba(110, 231, 200, 0.08), transparent 70%); border-top: 1px solid var(--line); }
.pilot__inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: end; }
.pilot__cta { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.fine { font-size: 13px; color: var(--ink-2); }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: 14px; color: var(--ink-2); }
.footer__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a { color: var(--ink-1); }

/* Responsive */
@media (max-width: 980px) {
  .grid4 { grid-template-columns: repeat(2, 1fr); }
  .pilot__inner { grid-template-columns: 1fr; align-items: start; }
}
@media (max-width: 720px) {
  .grid3, .grid4 { grid-template-columns: 1fr; }
  .nav__links a:not(.btn) { display: none; }
  .signal__inner { flex-direction: column; align-items: flex-start; gap: 8px; }
}