.header {
  /*background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
  background-color: var(--purple);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.header-menu {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 auto;
  padding: 0 20px;
}

.header-menu a {
  position: relative;
  color: white;
  text-decoration: none;
  padding: 1.8rem 2rem;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 500;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  overflow: hidden;
}

.header-menu a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lavander), var(--light-blue));
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.header-menu a::after {
  content: '';
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  text-decoration: none;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  transition: all 0.3s ease;
}

.logo-image {
  width: 340px;
  height: 80px;
  border-radius: 8px;
  object-fit: contain;
  transition: all 0.3s ease;
  /*filter: brightness(0) invert(1);*/
}

.header-menu a:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.header-menu a:hover::before {
  width: 80%;
}

.header-menu a:hover::after {
  left: 100%;
}

.header-menu a.active {
  background: rgba(255, 255, 255, 0.15);
  font-weight: 600;
}

.header-menu a.active::before {
  width: 100%;
  background: linear-gradient(90deg, var(--lavander), var(--light-blue));
}

/* Анимация при загрузке */
.header-menu a {
  animation: slideIn 0.6s ease forwards;
  opacity: 0;
  transform: translateY(-20px);
}

.header-menu a:nth-child(1) { animation-delay: 0.1s; }
.header-menu a:nth-child(2) { animation-delay: 0.2s; }
.header-menu a:nth-child(3) { animation-delay: 0.3s; }

@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Адаптивность */
@media (max-width: 768px) {
  .header-menu {
    flex-direction: column;
    padding: 0;
  }
  
  .header-menu a {
    width: 100%;
    text-align: center;
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .header-menu a:last-child {
    border-bottom: none;
  }
}

/* Эффект пульсации при наведении на кнопку выхода */
.header-menu a[onclick]:hover {
  background: linear-gradient(135deg, #ff6b6b, #ee5a52);
}

.header-menu a[onclick]:hover::before {
  background: linear-gradient(90deg, #ffd89b, #ff6b6b);
}