/* ============================================
   CoColour Life — Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-md) 0;
  transition: all var(--duration-normal) var(--ease-out);
  background: transparent;
}

.nav.scrolled {
  background: rgba(254, 254, 254, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  padding: var(--space-sm) 0;
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo-ring {
  width: 28px;
  height: 28px;
}

.nav-brand {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
  color: var(--black);
}

.brand-co {
  color: var(--teal);
}

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

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--mid-grey);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-link:hover {
  color: var(--black);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--teal);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link--cta {
  padding: 0.45rem 1.1rem;
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
}

.nav-link--cta:hover {
  color: var(--white);
  background: #333;
}

.nav-link--cta::after {
  display: none;
}

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--black);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-mobile-menu);
  background: rgba(254,254,254,0.98);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  color: var(--dark-grey);
  transition: color var(--duration-fast);
}

.mobile-link:hover {
  color: var(--teal);
}

.mobile-link--cta {
  margin-top: var(--space-md);
  padding: 0.6rem 1.75rem;
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
}

.mobile-link--cta:hover {
  color: var(--white);
}