*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.01em;
}
p { margin: 0; line-height: 1.6; }
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}
@media (max-width: 640px) {
  .wrap { padding: 0 var(--space-sm); }
}

/* ---------- Nav: persistent dark glass thread across every page ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(11, 18, 32, 0.35);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}
.site-nav.is-scrolled {
  background: rgba(11, 18, 32, 0.72);
}
.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav-name {
  font-family: var(--font-display);
  font-weight: 600;
  color: #fff;
  font-size: 1.05rem;
}
.nav-links {
  display: flex;
  gap: var(--space-md);
}
.nav-links a {
  color: rgba(255,255,255,0.72);
  font-size: 0.92rem;
  font-family: var(--font-body);
  transition: color 0.25s var(--ease);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--c-accent);
}
.nav-cta {
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  color: #fff !important;
  font-size: 0.85rem;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}
.nav-cta:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.5); }
.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: block;
    background: none; border: none;
    color: #fff; font-size: 1.4rem;
    cursor: pointer;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(11,18,32,0.94);
    backdrop-filter: blur(18px);
    padding: var(--space-md);
    gap: var(--space-sm);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
}

/* ---------- Glass panels: white-tinted on dark, ink-tinted on light ---------- */
.glass {
  background: var(--glass-light-bg);
  border: 1px solid var(--glass-light-brd);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.28);
}
.glass-on-light {
  background: var(--glass-dark-bg);
  border: 1px solid var(--glass-dark-brd);
  box-shadow: 0 6px 24px rgba(20,24,31,0.06);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.btn-primary {
  background: var(--c-accent);
  color: #fff;
  border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(59,130,246,0.35); }
.btn-ghost {
  background: transparent;
  color: inherit;
  border: 1px solid var(--glass-dark-brd);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--c-accent); }
.btn-ghost.on-dark {
  border-color: rgba(255,255,255,0.28);
  color: #fff;
}
.btn-ghost.on-dark:hover { border-color: rgba(255,255,255,0.6); }

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * { transition-delay: calc(var(--i, 0) * 90ms); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .site-nav, .btn, .glass-mesh { transition: none !important; animation: none !important; }
}

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid var(--c-line);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--c-ink-soft);
  font-size: 0.85rem;
}
.footer-links { display: flex; gap: var(--space-md); }

::selection { background: var(--c-accent); color: #fff; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }