/* ========================================================
   NAV.CSS — Navigation Styles
   ======================================================== */

/* ===== NAVBAR ===== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  background: transparent;
  z-index: 1000;
  transition: background var(--transition-mid),
              border-bottom var(--transition-mid),
              backdrop-filter var(--transition-mid);
}

.navbar.scrolled {
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

/* ===== NAV LOGO ===== */

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--accent);
  white-space: nowrap;
}

/* ===== NAV LINKS ===== */

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text-primary);
}

.nav-links a.active {
  color: var(--accent);
}

.nav-ig-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
}

/* ===== HAMBURGER MENU ===== */

.nav-hamburger {
  display: none;
  width: 2.2rem;
  height: 2.2rem;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  padding: 0;
  z-index: 1101;
}

.hamburger-line {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-fast),
              opacity var(--transition-fast);
  transform-origin: center;
}

.hamburger-line:nth-child(1) {
  top: 0.5rem;
}

.hamburger-line:nth-child(2) {
  top: 1rem;
}

.hamburger-line:nth-child(3) {
  top: 1.5rem;
}

/* Hamburger open state */

.navbar.menu-open .hamburger-line:nth-child(1) {
  transform: translateY(0.5rem) rotate(45deg);
}

.navbar.menu-open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.navbar.menu-open .hamburger-line:nth-child(3) {
  transform: translateY(-0.5rem) rotate(-45deg);
}

/* ===== NAV OVERLAY ===== */

.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  z-index: 1100;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.nav-overlay.open {
  display: flex;
  opacity: 1;
}

.nav-overlay-links {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-overlay-links a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 4rem);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  opacity: 0;
  animation: fadeInUp 600ms var(--transition-fast) forwards;
  padding: 0.5rem 0;
}

.nav-overlay.open .nav-overlay-links a:nth-child(1) {
  animation-delay: 0ms;
}

.nav-overlay.open .nav-overlay-links a:nth-child(2) {
  animation-delay: 100ms;
}

.nav-overlay.open .nav-overlay-links a:nth-child(3) {
  animation-delay: 200ms;
}

.nav-overlay.open .nav-overlay-links a:nth-child(4) {
  animation-delay: 300ms;
}

.nav-overlay.open .nav-overlay-links a:nth-child(5) {
  animation-delay: 400ms;
}

.nav-overlay-links a:hover,
.nav-overlay-links a:focus-visible {
  color: var(--accent);
}

/* ===== RESPONSIVE ===== */

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: block;
  }

  .navbar {
    padding: 0 var(--space-sm);
  }
}