@import url("https://navinav.neocities.org/pc-9900-v2.otf.woff2");
body{
  --tab-bg: #EEE;
  --tab-bg-active: #00FFFF;
  --tab-text: black;
  --tab-text-active: white;
  padding: 2rem;
  letter-spacing: 2px;
  line-height: 1.5;
  font-family:'pc-9900-v2',Sans-Serif;
  background:
    linear-gradient(
      90deg,
    #EEE 2px, transparent 2px
    )-1px -1px/3rem 3rem repeat,
  
    linear-gradient(
    #EEE 2px, transparent 2px
    )-1px -1px/3rem 3rem repeat;
}

.tab-menu{
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 0.3rem;
}

.tab-menu__button{
  appearance: none;
  border: 0;
  background: var(--tab-bg);
  color:var(--tab-text);
  padding: 0.75rem 1rem;
  letter-spacing: 2px; 
  font-family:'pc-9900-v2',Sans-Serif ;
  &.is-active{
    background: var(--tab-bg-active);
    color: var(--tab-text-active);
    border: 3px solid blue;
  }
}

.tab-panel{
  display: none;
  border: 3px solid gray;
  padding: 2rem;
  background: lightgray;
  &.is-active{
    display: block;
  }
    
  }