/* nav.css — shared top navigation (injected by core/chrome.js) */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav__inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav__logo {
  font-family: var(--font-display);
  font-weight: 850;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}
.nav__logo-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}
.nav__links {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  align-items: center;
}
.nav__link {
  font-size: .92rem;
  color: var(--muted);
  transition: color .2s ease;
  position: relative;
  padding-block: .3rem;
}
.nav__link:hover { color: var(--ink); }
.nav__link.is-active { color: var(--ink); }
.nav__link.is-active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.nav__cta { margin-left: .4rem; }

/* language selector (translations pending — UI affordance now, i18n retrofit at copy-freeze) */
.lang-select { position: relative; }
.lang-select__btn {
  display: inline-flex; align-items: center; gap: .4rem;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  padding: .45rem .9rem;
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}
.lang-select__btn:hover { border-color: var(--accent); color: var(--accent); }
.lang-select__menu {
  position: absolute;
  top: calc(100% + 8px); right: 0;
  min-width: 170px;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-pop);
  padding: .35rem;
  display: none;
  z-index: 120;
}
.lang-select__menu.is-open { display: grid; }
.lang-select__menu button {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  width: 100%;
  background: none; border: 0;
  padding: .55rem .7rem;
  border-radius: 8px;
  color: var(--ink-dim);
  font-size: .88rem;
  cursor: pointer;
  text-align: left;
}
.lang-select__menu button:hover { background: var(--surface); color: var(--ink); }
.lang-select__menu button.is-active { color: var(--accent); }
.lang-select__soon { font-family: var(--font-mono); font-size: .62rem; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }

/* toast */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translate(-50%, 12px);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--ink);
  font-size: .88rem;
  padding: .7rem 1.3rem;
  box-shadow: var(--shadow-pop);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
  z-index: 200;
}
.toast.is-shown { opacity: 1; transform: translate(-50%, 0); }

/* mobile */
.nav__burger {
  display: none;
  margin-left: auto;
  background: none; border: 0; cursor: pointer;
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  color: var(--ink);
}
.nav__burger svg { margin: auto; }
@media (max-width: 820px) {
  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
    padding: .6rem 1.25rem 1.2rem;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__link { padding: .85rem .25rem; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .nav__link:last-of-type { border-bottom: 0; }
  .nav__burger { display: flex; }
  .nav__cta { margin: .8rem 0 0; text-align: center; }
}