/* Made of Copper — shared styles. Near-black ground, bronze hardware. */
:root {
  /* Ground: cool near-black, no brown wash */
  --bg: #06070a;
  --bg-2: #0a0c11;
  --surface: #0e1118;
  --surface-2: #12161f;

  /* Ink: cool off-white and grey, not cream and tan */
  --text: #e9e8e6;
  --muted: #868d99;
  --dim: #5b626e;

  /* Bronze: the only warm color on the page, used as metal not as paint */
  --bronze: #cd9b62;
  --bronze-lt: #f0c894;
  --bronze-dk: #7a5730;
  --bronze-deep: #3d2b17;

  /* Electric accent, used sparingly for state and emphasis */
  --volt: #4fe3cf;

  /* Structure */
  --line: rgba(205, 155, 98, 0.16);
  --line-cool: rgba(160, 175, 200, 0.10);
  --radius: 12px;
  --radius-sm: 8px;
  --max: 1120px;
  --font: "Sora", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--bronze-lt); text-decoration: none; }
a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--bronze); }
::selection { background: var(--bronze); color: #0a0b0e; }

/* ---------- Background: black, a faint bronze grid, one cold horizon ---------- */
.bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    /* tight bronze glow, low and behind the content */
    radial-gradient(1100px 520px at 12% -15%, rgba(205, 155, 98, 0.13), transparent 62%),
    /* cold counter-light so the page reads black, not brown */
    radial-gradient(900px 600px at 100% 5%, rgba(79, 227, 207, 0.055), transparent 60%),
    radial-gradient(1000px 700px at 50% 118%, rgba(205, 155, 98, 0.06), transparent 60%),
    var(--bg);
}
/* Engineering grid */
.bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(205, 155, 98, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(205, 155, 98, 0.055) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(circle at 50% 30%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 10%, transparent 78%);
}
/* Fine scanlines + grain */
.bg::after {
  content: ""; position: absolute; inset: 0; opacity: 0.5;
  background-image:
    repeating-linear-gradient(to bottom, rgba(255,255,255,0.016) 0 1px, transparent 1px 3px),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.85 0 0 0 0 0.85 0 0 0 0 0.9 0 0 0 0.22 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ---------- Layout ---------- */
.wrap { width: min(var(--max), calc(100% - 2.5rem)); margin: 0 auto; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.3rem 0; gap: 1rem;
  border-bottom: 1px solid var(--line-cool);
}
.brand {
  display: inline-flex; align-items: center; gap: .7rem; color: var(--text);
  font-weight: 600; letter-spacing: .01em;
}
.brand:hover { text-decoration: none; color: var(--text); }
.brand .mark {
  width: 30px; height: 30px; border-radius: var(--radius-sm); display: grid; place-items: center;
  background: linear-gradient(160deg, #f4d3a6 0%, var(--bronze) 42%, #6d4b26 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.5),
    inset 0 -1px 0 rgba(0,0,0,.35),
    0 0 18px rgba(205,155,98,.30);
  font-family: var(--mono); font-size: 12px; font-weight: 700; color: #14100a;
}
.nav-links { display: flex; gap: 1.4rem; font-size: .9rem; font-family: var(--mono); letter-spacing: .02em; }
.nav-links a { color: var(--dim); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--bronze-lt); }

main { padding-bottom: 5rem; }
footer {
  border-top: 1px solid var(--line-cool);
  padding: 2rem 0 3rem;
  color: var(--dim); font-size: .88rem; font-family: var(--mono);
  display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between;
}
footer a { color: var(--dim); }
footer a:hover { color: var(--bronze-lt); }

/* ---------- Typography ---------- */
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 .6em; font-weight: 600; }
h1 { font-size: clamp(2.5rem, 6.5vw, 5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-top: 2.6em; }
h3 { font-size: 1.12rem; margin-top: 1.8em; }
p { margin: 0 0 1.1em; }
.lead { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); max-width: 46ch; }
.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--bronze);
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--bronze));
}
.gradient-text {
  background: linear-gradient(100deg, #fff1dc 0%, var(--bronze-lt) 38%, var(--bronze) 78%, #8a6134 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .78rem 1.3rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .92rem; letter-spacing: .01em;
  border: 1px solid var(--line); color: var(--text); background: rgba(255,255,255,.025);
  transition: transform .15s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.btn:hover {
  text-decoration: none; color: var(--text); transform: translateY(-1px);
  border-color: rgba(205,155,98,.55); background: rgba(205,155,98,.08);
  box-shadow: 0 0 0 1px rgba(205,155,98,.12), 0 8px 24px rgba(0,0,0,.5);
}
.btn.primary {
  background: linear-gradient(150deg, #f2cfa2 0%, var(--bronze) 55%, #996c38 100%);
  color: #100c07; border-color: rgba(255,220,180,.35);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.55),
    inset 0 -1px 0 rgba(0,0,0,.3),
    0 0 26px rgba(205,155,98,.28);
}
.btn.primary:hover {
  color: #100c07;
  background: linear-gradient(150deg, #ffe0bb 0%, var(--bronze-lt) 55%, var(--bronze) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.6), 0 0 38px rgba(205,155,98,.42);
}

/* ---------- Cards: black panels with bronze corner brackets ---------- */
.card {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line-cool); border-radius: var(--radius);
  padding: 1.6rem; position: relative; overflow: hidden;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card:hover {
  border-color: rgba(205,155,98,.34); transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(0,0,0,.55), 0 0 0 1px rgba(205,155,98,.08);
}
/* top hairline */
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(205,155,98,.55) 35%, rgba(79,227,207,.30) 65%, transparent);
  opacity: .8;
}
.grid { display: grid; gap: 1.1rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.pill {
  display: inline-block; padding: .22rem .7rem; border-radius: 999px; font-size: .74rem;
  font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase;
  color: var(--volt); border: 1px solid rgba(79,227,207,.3);
  background: rgba(79,227,207,.06);
}

/* ---------- Legal / document pages ---------- */
.doc { max-width: 74ch; }
.doc-head { padding: 3.5rem 0 1.2rem; border-bottom: 1px solid var(--line); margin-bottom: 2.5rem; }
.doc-meta { color: var(--dim); font-family: var(--mono); font-size: .82rem; letter-spacing: .04em; }
.doc h2 {
  padding-top: .5rem; scroll-margin-top: 2rem;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
}
.doc ul, .doc ol { padding-left: 1.3rem; }
.doc li { margin: .35em 0; }
.doc li::marker { color: var(--bronze-dk); }
.doc table { width: 100%; border-collapse: collapse; margin: 1rem 0 1.6rem; font-size: .94rem; }
.doc th, .doc td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--line-cool); vertical-align: top; }
.doc thead th { border-bottom-color: var(--line); }
.doc th {
  color: var(--bronze); font-weight: 500; font-family: var(--mono);
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
}
.doc tbody tr:hover { background: rgba(205,155,98,.03); }
.table-wrap { overflow-x: auto; }
.callout {
  border-left: 2px solid var(--bronze);
  background: linear-gradient(90deg, rgba(205,155,98,.075), transparent 70%);
  padding: 1.1rem 1.3rem; border-radius: 0 var(--radius) var(--radius) 0; margin: 1.5rem 0;
}
.toc { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.6rem 0 0; padding: 0; list-style: none; }
.toc a {
  display: inline-block; padding: .3rem .75rem; border-radius: var(--radius-sm);
  border: 1px solid var(--line-cool); color: var(--dim);
  font-size: .8rem; font-family: var(--mono);
}
.toc a:hover { color: var(--bronze-lt); border-color: rgba(205,155,98,.4); text-decoration: none; background: rgba(205,155,98,.05); }

/* ---------- Motion ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-links { gap: 1rem; font-size: .82rem; }
  .card { padding: 1.3rem; }
  .bg::before { background-size: 44px 44px; }
}