/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 24px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.4s var(--ease-out);
  backdrop-filter: blur(0px);
}
.nav.scrolled {
  padding: 14px 48px;
  backdrop-filter: blur(20px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.nav-logo-mark {
  width: 32px; height: 32px;
  position: relative;
  display: grid;
  place-items: center;
}
.nav-logo-mark svg { width: 100%; height: 100%; }
.nav-logo-mark::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--cyan), transparent 70%);
  opacity: 0.3;
  filter: blur(8px);
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.1); }
}
.nav-logo-text .sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--cyan);
  font-weight: 400;
  margin-top: -2px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
}
.nav-menu a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s;
}
.nav-menu a::before {
  content: counter(nav-counter, decimal-leading-zero) '. ';
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan);
  margin-right: 4px;
  opacity: 0.7;
}
.nav-menu { counter-reset: nav-counter; }
.nav-menu li { counter-increment: nav-counter; }
.nav-menu a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--cyan);
  transition: width 0.4s var(--ease-out);
}
.nav-menu a:hover::after,
.nav-menu a.active::after { width: 100%; }
.nav-menu a:hover,
.nav-menu a.active { color: var(--cyan); }

.nav-actions { display: flex; align-items: center; gap: 16px; }

.theme-toggle {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  display: grid;
  place-items: center;
  color: var(--text);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.theme-toggle:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: rotate(20deg);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.nav-cta {
  padding: 12px 24px;
  background: var(--cyan);
  color: var(--navy);
  border: none;
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.nav-cta:hover {
  background: var(--gold);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 184, 0, 0.3);
}

.mobile-toggle { display: none; }

@media (max-width: 968px) {
  .nav { padding: 18px 24px; }
  .nav.scrolled { padding: 12px 24px; }
  .nav-menu, .nav-cta { display: none; }
  .mobile-toggle {
    display: grid;
    place-items: center;
    width: 44px; height: 44px;
    border: 1px solid var(--border);
    background: transparent;
    border-radius: 50%;
    color: var(--text);
    cursor: pointer;
  }
  .mobile-toggle svg { width: 18px; height: 18px; }
  .nav-menu.open {
    display: flex;
    position: fixed;
    top: 80px; left: 24px; right: 24px;
    flex-direction: column;
    padding: 32px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    gap: 20px;
    align-items: flex-start;
  }
}