body {
  margin: 0;
  background-color: rgba(82, 85, 93);
}
.container {
  margin: 0 auto;
}
.research {
  margin: 0 auto;
  padding: 55px 0px 0px 100px;
  background: no-repeat center/cover url("../img/background.png");
  background-position: 0 0;
  width: 1700px;
  height: 700px;
}

.card-slot {
  padding: 95px 101px;
  margin-bottom: 35px;
  display: inline-block;
  position: relative;
}

.card {
  display: inline-block;
  position: absolute;
  height: 100%;
  width: 100%;
  left: 0;
  top: 2px;
  background: no-repeat center/cover;
}

.NeutronBombs      { background-image: url("../img/1neutronBombs.png"); }
.Starbase          { background-image: url("../img/1starbase.png"); }
.PlasmaCannon      { background-image: url("../img/1plasmaCannon.png"); }
.PhaseShield       { background-image: url("../img/1phaseShield.png"); }
.AdvancedMining    { background-image: url("../img/1advancedMining.png"); }
.TachyonSource     { background-image: url("../img/1tachyonSource.png"); }
.PlasmaMissile     { background-image: url("../img/1plasmaMissle.png"); }
.GluonComputer     { background-image: url("../img/1gluonComputer.png"); }

.GaussShield       { background-image: url("../img/2gaussShield.png"); }
.ImprovedHull      { background-image: url("../img/2improvedHull.png"); }
.FusionSource      { background-image: url("../img/2fusionSource.png"); }
.PositronComputer  { background-image: url("../img/2positronComputer.png"); }
.AdvancedEconomy   { background-image: url("../img/2advancedEconomy.png"); }
.TachyonDrive      { background-image: url("../img/2tachyonDrive.png"); }
.AntimatterCannon  { background-image: url("../img/2antimatterCannon.png"); }
.QuantumGrid       { background-image: url("../img/2quantumGrid.png"); }

.Nanorobots        { background-image: url("../img/3nanorobots.png"); }
.FusionDrive       { background-image: url("../img/3fusionDrive.png"); }
.Orbitals          { background-image: url("../img/3orbital.png"); }
.AdvancedLabs      { background-image: url("../img/3advancedLabs.png"); }
.AdvancedRobotics  { background-image: url("../img/3advancedRobotics.png"); }
.Monolith          { background-image: url("../img/3monolith.png"); }
.ArtifactKey       { background-image: url("../img/3artifactKey.png"); }
.WormholeGenerator { background-image: url("../img/3wormholeGener.png"); }