/* Renaissance Tracks — design system (derived from Helius Partners architecture) */

:root {
  --ink-0: #07070a;
  --ink-1: #0a0a0f;
  --ink-2: #12121a;
  --ink-3: #1a1a24;
  --ink-4: #242430;
  --ink-5: #3a3a48;

  --cream-0: #f2ede0;
  --cream-1: #d8d2c2;
  --cream-2: #8a8477;
  --cream-3: #5a5549;

  --gold-0: #e9c877;
  --gold-1: #c8a24b;
  --gold-2: #9a7a34;
  --gold-3: #5a4721;

  --signal-green: #7fbf7f;
  --signal-red: #d47a6a;
  --signal-blue: #6a9bd4;

  --font-display: "Instrument Serif", "Times New Roman", serif;
  --font-body: "Newsreader", Georgia, serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --font-sans: "Inter Tight", "Helvetica Neue", sans-serif;

  --page-max: 1440px;
  --gutter: clamp(20px, 4vw, 64px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--ink-1);
  color: var(--cream-0);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  overflow-x: hidden;
}

body {
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(200, 162, 75, 0.06), transparent 60%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(200, 162, 75, 0.03), transparent 60%),
    var(--ink-1);
  min-height: 100vh;
}

::selection { background: var(--gold-1); color: var(--ink-0); }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 1000;
  opacity: 0.045; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.95;
  color: var(--cream-0);
}
.display em, .italic { font-style: italic; color: var(--gold-0); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cream-2);
}
.eyebrow .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold-1); margin-right: 10px; vertical-align: middle;
  box-shadow: 0 0 8px var(--gold-1);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.02em; }
.tabular { font-variant-numeric: tabular-nums; }

.wrap { max-width: var(--page-max); margin: 0 auto; padding: 0 var(--gutter); }

.section {
  padding-top: clamp(80px, 12vh, 140px);
  padding-bottom: clamp(80px, 12vh, 140px);
  position: relative;
}

.hairline { height: 1px; background: linear-gradient(90deg, transparent, var(--ink-4) 20%, var(--ink-4) 80%, transparent); }
.hairline-gold { height: 1px; background: linear-gradient(90deg, transparent, var(--gold-2) 20%, var(--gold-2) 80%, transparent); opacity: 0.5; }

/* ——— Nav ——— */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10, 10, 15, 0.75);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border-bottom: 1px solid rgba(36, 36, 48, 0.6);
}
.nav-brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-display); font-size: 22px;
  letter-spacing: -0.01em;
}
.nav-brand .mark { width: 22px; height: 22px; position: relative; display: inline-block; }
.nav-links {
  display: flex; gap: 32px; align-items: center;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--cream-1);
}
.nav-links a { transition: color .2s; }
.nav-links a:hover { color: var(--gold-0); }
.nav-links a .idx { color: var(--cream-3); margin-right: 6px; font-size: 10px; }
.nav-cta {
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 10px 18px;
  border: 1px solid var(--gold-2);
  color: var(--gold-0);
  transition: all .25s;
  display: inline-flex; align-items: center; gap: 8px;
}
.nav-cta:hover {
  background: var(--gold-1); color: var(--ink-0);
  border-color: var(--gold-1);
  box-shadow: 0 0 40px rgba(200, 162, 75, 0.35);
}
.nav-cta .arrow { transition: transform .25s; }
.nav-cta:hover .arrow { transform: translateX(4px); }

/* ——— Buttons ——— */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  transition: all .25s cubic-bezier(.2,.8,.2,1);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gold-1); color: var(--ink-0);
  box-shadow: 0 0 0 rgba(200,162,75,0);
}
.btn-primary:hover {
  background: var(--gold-0);
  box-shadow: 0 10px 60px rgba(200,162,75,0.35);
  transform: translateY(-1px);
}
.btn-ghost { border-color: var(--ink-4); color: var(--cream-1); }
.btn-ghost:hover { border-color: var(--gold-2); color: var(--gold-0); }

.muted { color: var(--cream-2); }
.dim { color: var(--cream-3); }
.gold { color: var(--gold-0); }

.section-num {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.3em; color: var(--cream-3);
  display: flex; align-items: center; gap: 16px;
}
.section-num::before, .section-num::after {
  content: ""; flex: 1; height: 1px; background: var(--ink-4);
}