/* ============================================================
   SmartStack — nav.css
   Navigation pill flottante + burger mobile
   ============================================================ */

.nav {
  position: fixed;
  top: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 2rem);
  max-width: 1120px;
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  padding: 0.75rem 1.25rem;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 45px;
  width: auto;
  max-width: none;
  mix-blend-mode: multiply;
  margin-right: 0.5rem;
}

.nav__logo span {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}

.nav__logo span:first-of-type {
  color: var(--color-navy);
}
.nav__logo span:last-of-type {
  color: var(--color-blue);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-left: auto;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-pill);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text);
  background-color: rgba(15, 23, 42, 0.05);
}

.nav__link--active {
  color: var(--color-text);
  background-color: rgba(15, 23, 42, 0.05);
}

.nav__cta {
  flex-shrink: 0;
  font-size: 0.8125rem;
  padding: 0.5rem 1rem;
}

.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
}

.nav__burger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition:
    transform var(--transition-base),
    opacity var(--transition-base);
  transform-origin: center;
}

/* Burger open state */
.nav--open .nav__burger span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav--open .nav__burger span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav--open .nav__burger span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav open */
.nav--open .nav__links {
  display: flex;
}
.nav--open .nav__cta {
  display: inline-flex;
}

/* ─── Responsive : desktop (1024px+) ─── */
@media (min-width: 1024px) {
  .nav__links {
    display: flex;
  }
  .nav__cta {
    display: inline-flex;
  }
  .nav__burger {
    display: none;
  }
}

/* ─── Responsive : mobile (<768px) ─── */
@media (max-width: 767px) {
  .nav__links {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-sm));
    left: 0;
    right: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    flex-direction: column;
    gap: var(--space-xs);
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.25s ease;
    z-index: 100;
  }

  .nav__link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 1rem;
  }

  .nav__cta {
    display: none;
  }
  .nav__burger {
    display: flex;
  }

  .nav--open .nav__cta {
    width: 45%;
    font-size: 0.625rem; /* 10px */
  }
}