header {
  width: 100%;
  padding: 16px 8%;
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid rgba(223, 225, 230, 0.6);
  transition: var(--transition);
}

#navbar {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 82, 204, 0.15);
  background: #FFFFFF;
}

.brand-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: -0.5px;
  line-height: 1;
}

.brand-title span {
  color: var(--primary-blue);
  display: block;
  font-size: 0.75rem;
  letter-spacing: 1.5px;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 2px;
}

#nav_list {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-item a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 0;
  position: relative;
  transition: var(--transition);
}

.nav-item a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--primary-blue);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-item a:hover {
  color: var(--primary-blue);
}

.nav-item.active a {
  color: var(--primary-blue);
  font-weight: 700;
}

.nav-item.active a::after {
  width: 100%;
}

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

#mobile_btn {
  display: none;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  color: var(--primary-dark);
  cursor: pointer;
  padding: 6px;
}

#mobile_menu {
  display: none;
}

@media screen and (max-width: 1080px) {
  #nav_list,
  .header-actions .btn-primary {
    display: none;
  }

  #mobile_btn {
    display: block;
  }

  #mobile_menu.active {
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: #FFFFFF;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    padding: 24px 8%;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
  }

  #mobile_nav_list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    list-style: none;
  }

  #mobile_nav_list .nav-item a {
    font-size: 1.1rem;
  }
}