@font-face {
  font-family: "azeret";
  src: url("AzeretMono-Light.ttf") format("truetype");
 }
 
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: azeret, sans-serif;
  color: yellow;
  text-shadow: 0 0 10px yellow;
  text-align: center;
  line-height: 4vmin;
}
body{
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: black;
}
.container{
  width: 80vmin;
  height: 80vmin;
  display: flex;
  flex-wrap: wrap;
  cursor: pointer;
}
.container > div{
  width: 4vmin;
  height: 4vmin;
  flex: 0 0 auto;
}

/* SECTION FORMES ----------------------- */
.empty{}
.slash::after{content:'/';}
.twopoints::after{content:':';}
.a::after{content:'A';}
.b::after{content:'B';}
.c::after{content:'C';}
.d::after{content:'D';}
.e::after{content:'E';}
.f::after{content:'F';}
.g::after{content:'G';}
.h::after{content:'H';}
.i::after{content:'I';}
.j::after{content:'J';}
.k::after{content:'K';}
.l::after{content:'L';}
.m::after{content:'M';}
.n::after{content:'N';}
.o::after{content:'O';}
.p::after{content:'P';}
.q::after{content:'Q';}
.r::after{content:'R';}
.s::after{content:'S';}
.t::after{content:'T';}
.u::after{content:'U';}
.v::after{content:'V';}
.w::after{content:'W';}
.x::after{content:'X';}
.y::after{content:'Y';}
.z::after{content:'Z';}

/* SECTION COULEURS --------------------- */

.color0{background-color: transparent;}
.color1{background-color: yellow;box-shadow: 0 0 3vmin rgba(255,255,0,.6);}