styles.css

@font-face {
  font-family: "ArcadeClassic";
  font-style: normal;
  font-weight: 400;
  src: local("ArcadeClassic"),
    url("https://fonts.cdnfonts.com/s/6071/ARCADECLASSIC.woff") format("woff");
}

p {
  margin: 0;
}

html,
body {
  height: 100%;
  overflow: hidden;
  background-color: black;
  font-family: "ArcadeClassic";
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

canvas#mesa {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: black;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  outline: none;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0); /* mobile webkit */
}

main {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.interfaz {
  position: absolute;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
  color: white;
  width: 80%;
  height: 75%;
}

.puntaje-jugando {
  position: absolute;
  display: none;
  flex-direction: row;
  align-items: flex-start;
  justify-content: center;
  font-size: 30px;
  z-index: 10;
  color: white;
  width: 50%;
  height: 75%;
  gap: 100px;
}

.game-over {
  position: absolute;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
  font-size: 20px;
  color: white;
  width: 60%;
  height: 75%;
}

.ganador {
  margin-bottom: 5%;
  font-size: 35px;
}

.puntaje-final {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 95%;
  height: 30%;
  font-size: 40px;
  z-index: -1;
}

.puntaje-final-1 {
  text-align: left;
}

.puntaje-final-2 {
  text-align: right;
}

.aviso-girar-pantalla {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: absolute;
  z-index: 10;
  text-align: center;
  font-size: 20px;
  color: white;
}

.titulo-ping-pong {
  font-size: 45px;
}

.menu {
  text-align: center;
  font-size: 20px;
  height: auto;
}

.menu-principal,
.menu-multijugador,
.menu-como-jugar,
.menu-opciones {
  display: none;
}

.active {
  display: block;
}

.contenedor-guia-desktop,
.contenedor-guia-movil {
  display: none;
  align-items: center;
  justify-content: center;
}

.guia-activa {
  display: flex;
}

.contenedor-guia-desktop > .boton-regresar,
.contenedor-guia-movil > .boton-regresar {
  margin: 0;
}

.guia-un-jugador,
.guia-multijugador-local {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3.5%;
}

.contenedor-guia-desktop .guia-un-jugador,
.contenedor-guia-desktop .guia-multijugador-local {
  width: 50px;
  height: 250px;
  margin-bottom: 3.5%;
}

.contenedor-guia-movil .guia-un-jugador,
.contenedor-guia-movil .guia-multijugador-local {
  width: 50px;
  height: 70%;
  margin-bottom: 2.5%;
}

.guia-un-jugador {
  left: 0;
}

.guia-multijugador-local {
  right: 0;
}

div.icon-guia {
  font-size: 50px;
}

.boton {
  margin: 13px 0;
  transition: 0.2s;
}

.boton-regresar {
  margin-top: 40px;
}

.boton:active {
  transform: scale(0.92);
}

span.checkbox {
  position: absolute;
  color: white;
  font-weight: bold;
  margin-left: 10px;
}

span.checkbox::after {
  position: absolute;
  content: "";
  font-weight: lighter;
  border: 2.5px solid white;
  width: 14px;
  height: 14px;
}

span.checkbox.checked::after {
  background-color: white;
  box-shadow: inset 0px 0px 0px 3.5px black;
}

footer {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  font-size: 13px;
  gap: 10px;
  height: auto;
}

.icons {
  gap: 8px;
}

.icon {
  font-size: 22px;
  color: white;
  transition: 0.2s;
}

.fa-brands {
  transition: 0.2s;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.fa-brands:active {
  transform: scale(1.2);
}

.fa-brands::after {
  position: absolute;
  content: "";
  z-index: -5;
  margin: 2px -19px;
  width: 19px;
  height: 18px;
  border-radius: 20px;
  background-color: black;
  transition: 0.2s;
}

.fa-linkedin:active {
  color: #0e76a8;
}

.fa-github:active {
  border-radius: 25px;
  color: black;
}

.fa-brands:active::after {
  background-color: white;
}

@media screen and (min-width: 992px) {
  .puntaje-jugando {
    font-size: 50px;
    gap: 200px;
  }

  .game-over {
    font-size: 30px;
  }

  .ganador {
    margin-bottom: 80px;
    font-size: 50px;
  }

  .puntaje-final {
    width: 100%;
    font-size: 50px;
  }

  .titulo-ping-pong {
    font-size: 65px;
  }

  span.checkbox {
    position: absolute;
    color: white;
    font-size: 17px;
    font-weight: bold;
    margin: 3px 0 0 10px;
    width: 20px;
    height: 20px;
  }

  span.checkbox::after {
    position: absolute;
    content: "";
    font-weight: lighter;
    border: 3.5px solid white;
    width: 16px;
    height: 16px;
  }

  span.checkbox.checked::after {
    background-color: white;
    box-shadow: inset 0px 0px 0px 4px black;
  }

  .menu {
    font-size: 32px;
  }

  .boton {
    margin: 17px 0;
  }

  .boton-regresar {
    margin-top: 60px;
  }

  .boton:hover {
    cursor: pointer;
    transform: scale(1.1);
  }

  .fa-brands:hover {
    transform: scale(1.2);
  }

  .fa-brands::after {
    position: absolute;
    content: "";
    z-index: -5;
    margin: 2px -19px;
    width: 18px;
    height: 18px;
    border-radius: 20px;
    background-color: black;
    transition: 0.2s;
  }

  .fa-linkedin:hover {
    color: #0e76a8;
  }

  .fa-github:hover {
    border-radius: 25px;
    color: black;
  }

  .fa-brands:hover::after {
    background-color: white;
  }
}