/* ==========================================================================
   Nav — Top navigation bar
   ========================================================================== */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg) 0;
  margin-bottom: var(--space-md);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-cyan);
  letter-spacing: 0.06em;
}

.nav__logo-symbol {
  font-size: 20px;
  font-weight: 700;
  text-shadow: 0 0 20px var(--color-cyan-glow);
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-size: 14px;
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
}

/* CTA button in nav */
.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: var(--color-green);
  color: var(--color-bg);
  font-size: 13px;
  font-weight: var(--fw-semibold);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav__cta:hover {
  background: var(--color-green-bright);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--color-green-glow);
}

/* Mobile hamburger */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.2s ease;
}

.nav__toggle-bar + .nav__toggle-bar {
  margin-top: 5px;
}

/* Hamburger → X transition */
.nav__toggle--open .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle--open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile-menu {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.nav__mobile-menu__inner {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: 0;
  transition: padding 0.3s ease;
}

/* Mobile breakpoint */
@media (max-width: 768px) {
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: block;
  }

  .nav__mobile-menu {
    background: var(--color-bg-card);
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    margin-top: var(--space-sm);
    margin-bottom: var(--space-md);
    transition: grid-template-rows 0.3s ease, border-color 0.3s ease;
  }

  .nav__mobile-menu--open {
    grid-template-rows: 1fr;
    border-color: var(--color-border);
  }

  .nav__mobile-menu--open .nav__mobile-menu__inner {
    padding: var(--space-lg);
  }

  .nav__mobile-menu .nav__link {
    font-size: 16px;
    padding: var(--space-sm) 0;
  }

  .nav__mobile-menu .nav__cta {
    align-self: flex-start;
  }
}