.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text-heading);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--text-lg);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-text-heading);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta,
.header-cta {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-lg);
  transform: translateY(-10px);
  opacity: 0;
  transition: all var(--transition-base);
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu .nav-link {
  font-size: var(--text-base);
  padding: var(--space-sm) 0;
}

.mobile-menu .nav-cta-mobile {
  margin-top: var(--space-md);
  text-align: center;
  display: inline-block;
}

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

  .mobile-menu-btn {
    display: flex;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }

  .logo {
    font-size: var(--text-base);
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: var(--text-sm);
  }

  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: var(--text-sm);
  }
}