header {
  display: flex;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background-color: #ffffff;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header .header-logo {
  float: left;
  margin-left: 20px;
}

.header-logo img {
  height: 60px;
  padding-right: 20px;
}

header h1 {
  align-content: center;
}