/* ============================================================
   G-IA · nav.css
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(249, 249, 252, 0.72);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t), background var(--t), box-shadow var(--t);
}

.nav.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 14px rgba(0, 0, 0, 0.04);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ---- Brand ---- */
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.nav__logo {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--violet);
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -1px;
  box-shadow: 0 3px 10px rgba(124, 58, 237, 0.32);
}

.nav__brand-text {
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -1px;
}

/* ---- Links ---- */
.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  font-size: 0.94rem;
  font-weight: 400;
  color: var(--text2);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  transition: color var(--t), background var(--t);
}
.nav__link:hover { color: var(--text); background: var(--bg-alt); }

.nav__cta { margin-left: 6px; }

/* ---- Hamburger ---- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform var(--t), opacity var(--t);
}
.nav__hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Mobile ---- */
@media (max-width: 860px) {
  .nav__hamburger { display: flex; }

  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 24px 28px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 18px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t), opacity var(--t);
  }
  .nav__links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link { padding: 12px 14px; font-size: 1.02rem; }
  .nav__cta { margin: 8px 0 0; width: 100%; }
}