/* ─── Higgs Dyson — shared styles ─── */
:root {
  --bg: #3D1F1F;
  --bg-deep: #2A1414;
  --bg-deeper: #1C0D0D;
  --border: #5A2E2E;
  --gold: #FFE117;
  --gold-soft: #FFE11733;
  --text: #FFFFFF;
  --text-muted: #F5E6D3;
  --text-dim: #C9B7A3;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  line-height: 1.5;
}
.serif { font-family: 'Fraunces', Georgia, serif; font-weight: 600; letter-spacing: -0.02em; }

/* ─── Nav ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 1rem 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(12px);
  background: rgba(61, 31, 31, 0);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease, padding 0.3s ease;
}
nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(61, 31, 31, 0.85);
  padding: 0.75rem 2.5rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo .mark     { height: 34px; width: auto; display: block; }
.nav-logo .wordmark { height: 18px; width: auto; display: block; }

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
}
.nav-links a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
}
.nav-links a:hover,
.nav-links a.active { color: var(--gold); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* ─── Stars (used on hero & contact backdrops) ─── */
.star {
  position: absolute;
  width: 2px; height: 2px;
  background: var(--gold);
  border-radius: 50%;
  opacity: 0.5;
  box-shadow: 0 0 6px var(--gold);
  pointer-events: none;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.95rem 1.75rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, opacity 0.2s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn-primary { background: var(--gold); color: var(--bg-deeper); }
.btn-primary:hover { transform: translateY(-2px); background: #fff05a; }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; transform: none; background: var(--gold); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

/* ─── Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Footer ─── */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* ─── Mobile breakpoint ─── */
@media (max-width: 640px) {
  nav { padding: 0.75rem 1.25rem; }
  nav.scrolled { padding: 0.6rem 1.25rem; }
  .nav-logo { gap: 0.5rem; }
  .nav-logo .mark { height: 28px; }
  .nav-logo .wordmark { height: 14px; }
  .nav-links { gap: 1.5rem; font-size: 0.8rem; }
  .btn { padding: 0.85rem 1.5rem; font-size: 0.9rem; }
  footer { padding: 2rem 1.25rem; font-size: 0.8rem; justify-content: center; text-align: center; }
}