/* CoLab Haus — Navigation (Dark Prismatic Theme) */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--ch-nav-height);
  display: flex;
  align-items: center;
  transition: all var(--ch-duration) var(--ch-ease);
  background: transparent;
}

.nav--scrolled {
  background: rgba(10, 10, 12, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--ch-max-width);
  margin: 0 auto;
  padding: 0 var(--ch-space-xl);
}

/* Logo — Text-only wordmark, Plus Jakarta Sans 800 */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--ch-space-sm);
  font-family: var(--ch-font-display);
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ch-white);
  text-decoration: none;
}

.nav__logo:hover {
  color: var(--ch-white);
}

/* SVG icon — hidden in prismatic theme (wordmark IS the logo) */
.nav__logo-icon {
  display: none;
}

.nav__logo-text span {
  background: linear-gradient(135deg, var(--ch-prism-vivid-mint), var(--ch-prism-vivid-violet), var(--ch-prism-vivid-peach));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: prismFlow 6s linear infinite;
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--ch-space-2xl);
}

.nav__link {
  font-family: var(--ch-font-display);
  font-size: var(--ch-text-sm);
  font-weight: 500;
  color: var(--ch-gray-400);
  text-decoration: none;
  transition: color var(--ch-duration) var(--ch-ease);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ch-gradient-prism-vivid);
  transition: width var(--ch-duration) var(--ch-ease);
}

.nav__link:hover {
  color: var(--ch-white);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--active {
  color: var(--ch-white);
}

.nav__link--active::after {
  width: 100%;
}

/* CTA */
.nav__cta {
  margin-left: var(--ch-space-lg);
}

/* Mobile Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ch-white);
  border-radius: 2px;
  transition: all var(--ch-duration) var(--ch-ease);
}

/* Mobile Menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--ch-nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--ch-black);
  padding: var(--ch-space-2xl);
  z-index: 999;
}

.nav__mobile.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--ch-space-lg);
}

.nav__mobile .nav__link {
  font-size: var(--ch-text-xl);
  color: var(--ch-gray-300);
  padding: var(--ch-space-md) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (max-width: 900px) {
  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }
}

/* Toggle animation */
.nav__toggle.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav__toggle.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}