/* Cairn marketing site — slate + Summit Teal, matching the web UI brand. */

/* Self-hosted fonts — no third-party requests, consistent rendering everywhere. */
@font-face {
  font-family: 'Inter';
  src: url('assets/fonts/inter-var-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('assets/fonts/jetbrains-mono-var-latin.woff2') format('woff2');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --a-300: #5eead4;
  --a-400: #2dd4bf;
  --a-500: #14b8a6;
  --a-600: #0d9488;
  --a-700: #0f766e;

  --bg: #0b1220;
  --bg-2: #0f172a;
  --panel: #131f33;
  --panel-2: #18263d;
  --line: #1f2c40;
  --line-2: #27384f;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-faint: #64748b;

  --maxw: 1140px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
.h2, h2, h3 { text-wrap: balance; }
p, li { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(45,212,191,0.28); color: var(--text); }
:focus-visible { outline: 2px solid var(--a-400); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- glow backdrop ---------- */
.backdrop {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 50% at 75% -5%, rgba(20,184,166,0.16), transparent 70%),
    radial-gradient(50% 40% at 10% 5%, rgba(13,148,136,0.10), transparent 70%);
}

/* ---------- nav ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11,18,32,0.72);
  border-bottom: 1px solid var(--line);
}
nav { display: flex; align-items: center; gap: 22px; height: 64px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 19px; letter-spacing: -.02em; }
.brand .mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(150deg, var(--a-400), var(--a-600));
  display: grid; place-items: center;
  box-shadow: 0 6px 18px -6px var(--a-600);
}
.brand .mark svg { width: 18px; height: 18px; }
nav .links { display: flex; gap: 22px; margin-left: auto; }
nav .links a { color: var(--text-dim); font-size: 14.5px; font-weight: 500; }
nav .links a:hover { color: var(--text); }
nav .cta { margin-left: 8px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14.5px; font-weight: 600; padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line-2); background: var(--panel); color: var(--text);
  cursor: pointer; transition: .15s;
}
.btn:hover { border-color: var(--a-600); transform: translateY(-1px); }
.btn.primary {
  background: var(--a-500); border-color: var(--a-500); color: #04201c;
  box-shadow: 0 10px 26px -10px var(--a-500);
}
.btn.primary:hover { background: var(--a-400); border-color: var(--a-400); }
.btn svg { width: 16px; height: 16px; }

/* ---------- hero ---------- */
.hero { padding: 86px 0 48px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; color: var(--a-300);
  background: rgba(20,184,166,0.10); border: 1px solid rgba(20,184,166,0.30);
  padding: 6px 13px; border-radius: 999px; margin-bottom: 22px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--a-400); box-shadow: 0 0 8px var(--a-400); }
.hero h1 {
  font-size: clamp(38px, 6vw, 62px); line-height: 1.06; letter-spacing: -.03em; font-weight: 800;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--a-300), var(--a-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { margin-top: 22px; font-size: 19px; line-height: 1.65; color: var(--text-dim); max-width: 56ch; }
.hero .actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero .note { margin-top: 16px; font-size: 13px; color: var(--text-faint); }

.shot {
  margin-top: 56px; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line-2);
  box-shadow: 0 40px 90px -40px rgba(0,0,0,0.8), 0 0 0 1px rgba(20,184,166,0.06);
  background: var(--bg-2);
}
.shot img { display: block; width: 100%; }

/* ---------- logos / trust strip ---------- */
.trust { padding: 34px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: 64px; }
.trust .row { display: flex; flex-wrap: wrap; gap: 14px 30px; align-items: center; justify-content: center; color: var(--text-faint); font-size: 14px; }
.trust .row b { color: var(--text-dim); font-weight: 600; }
.trust .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--line-2); }

/* ---------- sections ---------- */
section.block { padding: 84px 0; }
.eyebrow { color: var(--a-400); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.12; letter-spacing: -.02em; font-weight: 800; margin-top: 10px; }
.sub { color: var(--text-dim); font-size: 17px; line-height: 1.65; margin-top: 14px; max-width: 62ch; }

.prose { margin-top: 28px; max-width: 68ch; display: flex; flex-direction: column; gap: 18px; }
.prose p { color: var(--text-dim); font-size: 17px; line-height: 1.75; }
.prose b { color: var(--text); font-weight: 600; }
.prose a { color: var(--a-300); border-bottom: 1px solid rgba(20,184,166,0.35); }
.prose a:hover { color: var(--a-400); }
.prose .closer { color: var(--text); font-weight: 600; font-size: 18px; line-height: 1.6; padding-left: 18px; border-left: 3px solid var(--a-400); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line); border-radius: 15px; padding: 22px;
  transition: .18s;
}
.card:hover { border-color: var(--a-700); transform: translateY(-3px); }
.card .ico {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: rgba(20,184,166,0.12); border: 1px solid rgba(20,184,166,0.25); margin-bottom: 15px;
}
.card .ico svg { width: 21px; height: 21px; color: var(--a-300); }
.card h3 { font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.card p { color: var(--text-dim); font-size: 15px; line-height: 1.65; margin-top: 8px; }
.card .tag {
  display: inline-block; margin-top: 12px; font-size: 11px; font-weight: 700; letter-spacing: .04em;
  color: var(--a-300); background: rgba(20,184,166,0.10); border: 1px solid rgba(20,184,166,0.25);
  padding: 3px 8px; border-radius: 6px;
}

/* ---------- platforms & data ---------- */
.table-wrap { margin-top: 40px; border: 1px solid var(--line); border-radius: 15px; overflow-x: auto; background: linear-gradient(180deg, var(--panel), var(--bg-2)); }
.ptable { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
.ptable th {
  text-align: left; font-size: 12px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--text-faint); padding: 14px 20px; border-bottom: 1px solid var(--line-2);
}
.ptable td { padding: 15px 20px; color: var(--text-dim); line-height: 1.55; vertical-align: top; }
.ptable td:first-child { color: var(--text); font-weight: 600; white-space: nowrap; }
.ptable tbody tr + tr td { border-top: 1px solid var(--line); }

.datafields { margin-top: 36px; }
.dfrow {
  display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: baseline;
  padding: 18px 4px; border-top: 1px solid var(--line);
}
.dfrow:last-child { border-bottom: 1px solid var(--line); }
.dfrow h4 { font-size: 12.5px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--a-300); }
.dfrow p { color: var(--text-dim); font-size: 15px; line-height: 1.7; }

.roadmap-note { margin-top: 26px; font-size: 14px; color: var(--text-faint); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-top: 40px; }
.split ul { margin-top: 22px; display: flex; flex-direction: column; gap: 14px; }
.split li { display: flex; gap: 12px; font-size: 15.5px; line-height: 1.6; color: var(--text-dim); list-style: none; }
.split li svg { width: 20px; height: 20px; color: var(--a-400); flex-shrink: 0; margin-top: 1px; }
.split li b { color: var(--text); font-weight: 600; }

.code {
  background: #0a1120; border: 1px solid var(--line-2); border-radius: 14px; overflow: hidden;
  font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 13px;
}
.code .bar { display: flex; gap: 7px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.code .bar i { width: 11px; height: 11px; border-radius: 50%; background: var(--line-2); display: inline-block; }
.code pre { padding: 18px; overflow-x: auto; color: #c8d3e2; line-height: 1.7; }
.code .c { color: var(--text-faint); }
.code .k { color: var(--a-300); }
.code .s { color: #9ae6c4; }

/* ---------- CTA ---------- */
.cta-band {
  margin: 0 auto; max-width: var(--maxw);
  background: linear-gradient(120deg, rgba(20,184,166,0.14), rgba(13,148,136,0.06));
  border: 1px solid rgba(20,184,166,0.25); border-radius: 22px; padding: 54px 40px; text-align: center;
}
.cta-band h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: -.02em; }
.cta-band p { color: var(--text-dim); margin-top: 12px; font-size: 17px; }
.cta-band .actions { margin-top: 26px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 80px; }
footer .row { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between; color: var(--text-faint); font-size: 13.5px; }
footer .row a:hover { color: var(--text-dim); }
footer .fl { display: flex; gap: 20px; }

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .dfrow { grid-template-columns: 1fr; gap: 8px; }
  nav .links { display: none; }
  section.block { padding: 64px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}