.page-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: #222;
  border-bottom: 1px solid #444;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  box-sizing: border-box;
  z-index: 1000;
  width: 100%;
}

.header-left,
.header-right {
  flex: 0 0 120px; /* fixed width containers */
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-center {
  flex: 1 1 auto; /* takes remaining space */
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
}

#topLeftButton,
#aboutButton {
  height: 40px;
  padding: 8px 14px;
  border-radius: 6px;
  font-weight: bold;
  font-size: 16px;
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  color: white;
}

#topLeftButton {
  background-color: #444;
}

#topLeftButton:hover {
  background-color: #666;
}

#aboutButton {
  background-color: #444;
}

#aboutButton:hover {
  background-color: #666;
}

.page-header h2 {
  margin: 0;
  color: white;
  font-size: 1.5rem;
  font-weight: normal;
  user-select: none;
  pointer-events: none;
  text-align: center;
  width: 100%;
}