.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(33, 33, 33, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-logo img {
  height: 40px;
  width: auto;
}

.header-logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-nav-link {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.header-nav-link:hover {
  color: var(--color-accent);
}

.header-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.btn-login {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  background-color: transparent;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.btn-login:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-signup {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-bg-primary);
  background-color: var(--color-accent);
  border: none;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-fast);
}

.btn-signup:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Mobile menu button */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1003;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

/* Mobile menu overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1001;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
}

/* Body scroll lock */
body.mobile-menu-open {
  overflow: hidden;
}

@media (max-width: 1024px) {
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1002;
  }

  /* Мобильная кнопка меню */
  .mobile-menu-toggle {
    display: flex;
    background-color: rgba(254, 184, 7, 0.2);
    padding: 8px;
    border-radius: 4px;
    z-index: 1003;
    cursor: pointer;
  }

  /* Десктопное меню скрываем на мобильных */
  .header-nav {
    display: none;
  }

  /* Активное мобильное меню */
  .header-nav.active {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: 100vh;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    background-color: #212121;
    padding: 120px 32px 32px;
    gap: 32px;
    z-index: 1001;
    overflow-y: auto;
  }

  /* Оверлей */
  .mobile-menu-overlay {
    display: none;
  }

  .mobile-menu-overlay.active {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
  }

  /* Стили для элементов меню */
  .header-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .header-nav-link {
    display: block;
    font-size: 18px;
    padding: 16px;
    border-radius: 8px;
    color: #ffffff;
    text-decoration: none;
    transition: background-color 0.15s ease;
  }

  .header-nav-link:hover {
    background-color: #2d2d2d;
  }

  .header-nav-link::after {
    display: none;
  }

  .header-actions {
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
  }

  .btn-signup {
    width: 100%;
    padding: 16px;
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  .header-logo-text {
    display: none;
  }
}