/* ====================================================
   NAV — Fixed top navigation
   ==================================================== */

#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--sp-5) var(--container-px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 10, 10, 0.7);
  border-bottom: 1px solid var(--clr-border);
  transition: background var(--dur-base) ease;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.03em;
}

.nav__logo span {
  color: var(--clr-red);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  list-style: none;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  transition: color var(--dur-base) ease;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--clr-red);
  transition: width var(--dur-base) var(--ease-expo);
}

.nav__link:hover {
  color: #ffffff;
}

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

/* CTA button in nav */
.nav__cta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-bg);
  background: var(--clr-red);
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-full);
  transition: background var(--dur-base) ease,
              transform var(--dur-base) ease;
}

.nav__cta:hover {
  background: #c0082e;
  transform: translateY(-1px);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--sp-2);
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
  transition: transform var(--dur-base) ease, opacity var(--dur-base) ease;
}

/* Mobile nav overlay */
.nav__mobile {
  display: none;
  position: fixed;
  inset: 0;
  background: #0d0d0d;
  z-index: 2000;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--sp-8);
}

.nav__mobile.is-open {
  display: flex;
}

.nav__mobile-link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.03em;
  transition: color var(--dur-base) ease;
}

.nav__mobile-link:hover {
  color: var(--clr-red);
}

.nav__mobile-close {
  position: absolute;
  top: var(--sp-6);
  right: var(--sp-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: #ffffff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav__links {
    display: none;
  }
  .nav__hamburger {
    display: flex;
  }
  .nav__cta {
    display: none;
  }
}