/* Shared Hal chrome: tokens, nav, buttons, footer.
 *
 * Extracted when the third page shape appeared. index.html and sell.html still
 * carry their own inline copies — those are bespoke marketing pages whose CSS
 * is mostly hero, ticker and flow-diagram rules that nothing else uses, and
 * rewriting a working live page to save duplication nobody is paying for is
 * churn. This sheet exists so the blog, which multiplies one essay at a time,
 * does not carry 300 lines of chrome in every file.
 *
 * If those two pages are ever touched for another reason, migrate them then.
 */

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

:root {
  --black: #080808;
  --white: #f4f0e8;
  --orange: #f5a623;
  --orange-dim: #c47d0e;
  --gray: #1a1a1a;
  --gray-mid: #2e2e2e;
  --gray-text: #6b6b6b;
  /* Lighter than --gray-text, for body copy that has to be read rather than
     glanced at. #6b6b6b on #080808 is about 3.4:1 — under the 4.5:1 AA floor.
     An essay is the one thing on this site nobody should squint at. */
  --body-text: #b4b0a8;
  --green: #34d399;
  --nav-h: 4.5rem;
  --mono: 'Space Mono', monospace;
  --sans: 'Syne', sans-serif;
}

html { scroll-behavior: smooth; }
html, body { max-width: 100%; overflow-x: hidden; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  overflow-x: hidden;
  cursor: crosshair;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: rgba(8,8,8,0.85);
  backdrop-filter: blur(12px);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: var(--orange);
  text-decoration: none;
}

.nav-links { display: flex; gap: 2.5rem; list-style: none; }

.nav-links a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-text);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--white); }
.nav-links a.active { color: var(--orange); }

.nav-cta {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--black);
  background: var(--orange);
  padding: 0.6rem 1.4rem;
  text-decoration: none;
  transition: background 0.2s;
}

.nav-cta:hover { background: var(--orange-dim); }

.nav-toggle { display: none; }
.nav-burger { display: none; cursor: pointer; width: 24px; height: 18px;
  flex-direction: column; justify-content: space-between; margin-left: 0.9rem; }
.nav-burger span { display: block; height: 2px; width: 100%;
  background: var(--white); transition: transform 0.2s, opacity 0.2s; }
.nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
.nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav-actions { display: flex; align-items: center; gap: 1.5rem; }

.nav-login {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-text);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-login:hover { color: var(--white); }

/* ── SHARED BLOCKS ── */
section { padding: 6rem 3rem; }

.section-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 1.5rem;
}

.btn-primary {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--black);
  background: var(--orange);
  padding: 1rem 2.5rem;
  text-decoration: none;
  display: inline-block;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary:hover { background: var(--orange-dim); transform: translateY(-2px); }

.btn-outline {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white);
  border: 1px solid var(--gray-mid);
  padding: 1rem 2.5rem;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.2s, color 0.2s;
}

.btn-outline:hover { border-color: var(--white); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--gray-mid);
  padding: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo { font-family: var(--mono); font-size: 0.9rem; letter-spacing: 0.2em; color: var(--orange); }
.footer-text { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.15em; color: var(--gray-text); }
.footer-links { display: flex; gap: 2rem; list-style: none; }

.footer-links a {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--gray-text);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--white); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  :root { --nav-h: 3.9rem; }
  nav { padding: 1.2rem 1.25rem; flex-wrap: wrap; }
  .nav-burger { display: flex; }
  .nav-links { display: none; flex-basis: 100%; flex-direction: column; gap: 0; margin: 1rem 0 0; }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-links li { border-top: 1px solid rgba(255,255,255,0.07); }
  .nav-links a { display: block; padding: 0.9rem 0.15rem; font-size: 0.78rem; }
  .nav-actions { gap: 0.6rem; margin-left: auto; }
  .nav-login { font-size: 0.62rem; letter-spacing: 0.1em; }
  .nav-cta { font-size: 0.62rem; letter-spacing: 0.1em; padding: 0.6rem 0.8rem; }
  section { padding: 4rem 1.5rem; }
  footer { flex-direction: column; gap: 1.5rem; text-align: center; }
}