nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 4rem;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 0.5px solid var(--border);
  transition: background-color 0.4s ease, border-color 0.4s ease, padding 0.25s ease;
}

nav.scrolled {
  padding: 0.6rem 4rem;
}

.nav-logo {
  font-family: 'Inter', sans-serif;
  font-size: 1.6rem;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-logo .su {
  font-weight: 400;
  color: var(--blue);
}

.nav-logo .cad {
  font-weight: 700;
  color: var(--orange);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mute);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--blue);
}

/* Theme toggle */
.theme-toggle {
  position: relative;
  width: 54px;
  height: 28px;
  border-radius: 14px;
  background: var(--border);
  border: none;
  cursor: pointer;
  padding: 0 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.3s ease;
}

.theme-toggle svg {
  width: 14px;
  height: 14px;
  z-index: 2;
  transition: opacity 0.3s, color 0.3s;
}

.theme-toggle .sun {
  color: var(--orange);
}

.theme-toggle .moon {
  color: var(--text-mute);
}

:root[data-theme="dark"] .theme-toggle .sun {
  color: var(--text-mute);
  opacity: 0.5;
}

:root[data-theme="dark"] .theme-toggle .moon {
  color: var(--blue);
  opacity: 1;
}

:root[data-theme="light"] .theme-toggle .moon {
  opacity: 0.5;
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s;
}

:root[data-theme="dark"] .theme-toggle::before {
  transform: translateX(26px);
}

/* CTA Nav */
.nav-cta {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  background: var(--orange);
  color: #fff;
  padding: 0.55rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: background-color 0.2s, transform 0.2s;
}

.nav-cta:hover {
  background: #b85420;
  transform: translateY(-1px);
}

:root[data-theme="dark"] .nav-cta:hover {
  background: #d47045;
}

/* Mobile Nav (si besoin) */
@media (max-width: 900px) {
  nav, nav.scrolled {
    padding: 0.75rem 1.5rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .nav-right {
    gap: 1rem;
  }
}