.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: #fff;
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-logo img {
  height: 36px;
  width: auto;
}

.header-logo span {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.header-nav a {
  font-size: 15px;
  color: var(--color-text);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-primary);
}

.header-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-report {
  font-size: 13px;
  color: var(--color-text-light);
  transition: color var(--transition);
}

.header-report:hover {
  color: var(--color-danger);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

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

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px;
    gap: 0;
    box-shadow: var(--shadow-md);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
  }

  .header-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .header-nav a {
    padding: 12px 0;
    font-size: 16px;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .header-right {
    gap: 8px;
  }

  .header-right .btn {
    padding: 6px 14px;
    font-size: 13px;
  }

  .header-report {
    display: none;
  }
}