/* ═══════════════════════════════════════
   nav.css — Navigation bar styles
═══════════════════════════════════════ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--side-pad);
  height: 72px;
  background: rgba(2, 8, 18, 0.75);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
nav.scrolled {
  background: rgba(2, 8, 18, 0.95);
}

/* ── Logo ── */
.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo span { color: var(--accent); }

.logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

/* ── Links ── */
.nav-links {
  display: flex;
  gap: 2.2rem;
}
.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  position: relative;
  transition: color 0.3s;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.nav-links a:hover              { color: var(--text); }
.nav-links a:hover::after       { transform: scaleX(1); }

/* ── CTA button ── */
.nav-cta {
  padding: 0.55rem 1.4rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background 0.25s, color 0.25s, box-shadow 0.25s;
}
.nav-cta:hover {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 24px rgba(0,200,255,0.4);
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}
.hamburger span {
  width: 26px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu ── */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0; bottom: 0;
  background: rgba(2, 8, 18, 0.97);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  z-index: 150;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  transition: color 0.3s;
}
.mobile-menu a:hover { color: var(--accent); }