:root {
  --header-underline-border: solid thin silver;
  --header-underline-border-center: solid thick pink;
  --line-color: black;
  --underline-center-color: pink;
}

.header-underline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.header-underline div:nth-child(1) {
  min-width: 10%;
  height: 2px !important;
  border: var(--header-underline-border);
  background: var(--line-color);
}
.header-underline div:nth-child(2) {
  min-width: 3%;
  height: 10px !important;
  background: var(--underline-center-color);
  border: var(--header-underline-border-right-center);
}
.header-underline div:nth-child(3) {
  min-width: 10%;
  height: 2px !important;
  border: var(--header-underline-border);
  background: var(--line-color);
}