body {
    color: #333;
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
}

main {
    margin: 40px;
}

h1 {
     font-size: 30px;
     margin-bottom: 40px;
}

a {
    text-decoration: none;
}

.button_container {
    border: 1px solid #ddd;
    margin: 0 10px 10px 0;
    padding: 20px;
    width: 300px;
    height: 300px;
    float: left;
    overflow: hidden;
    box-sizing: border-box;
    text-align: center;
}

a#btn_lyft {
    display: inline-block;
    position: relative;
    margin:auto;
    margin-top: 50px;
    padding: 25px;
    background-color: black;
    border-radius: 25px;
    transition: all .4s;
}

a#btn_lyft:hover {
    margin-top: 25px;
}

a#btn_lyft:hover #lyft-1 {
    padding-bottom: 15px;
    
}

a#btn_lyft:hover #lyft-2 {
    padding-bottom: 25px;
}

div#lyft-1 {
    display: inline-block;
    background-image: url(../assets/lyft-1.jpg);
    background-size: 75px 75px;
    background-repeat: no-repeat;

    width: 75px;
    height: 75px;
    transition: all .2s;
}
div#lyft-2 {
    display: inline-block;
    background-image: url(../assets/lyft-2.jpg);
    background-size: 75px 75px;
    background-repeat: no-repeat;

    margin-left: -4.16px;
    width: 75px;
    height: 75px;

    transition: all .4s;
}


a#btn_apple {
    display: inline-block;
    position: relative;
    margin:auto;
    margin-top: 75px;
    border-radius: 25px;
    transition: all .3s;

    background-color: lightgray;
    border-radius: 50%;
    padding: 25px 25px 30px 25px;
}

a#btn_apple:hover {
    background-color: black;
}

a#btn_apple:hover div#apple {
    background-image: url(../assets/apple-2.png);
}


div#apple {
    background-image: url(../assets/apple-1.png);
    background-size: 75px;

    width: 75px;
    height: 75px;
}


a#btn_teslamotors {
    display: inline-block;
    position: relative;
    margin:auto;
    margin-top: 75px;
    border-radius: 25px;
    transition: all .3s;
    
}

a#btn_teslamotors:hover {
    margin-top: 50px;
}


a#btn_teslamotors:hover div#teslamotors {
    height: 150px;
    transform: scale(1, 1);
    transition: all .3s;
}

div#teslamotors {
    background-image: url(../assets/teslamotors.png);
    background-size: cover;
    background-repeat: no-repeat;
    transform: scale(-1, 1);
    
    width: 150px;
    height: 120px;
    
}


#btn_stjude {
    display: inline-block;
    position: relative;
    margin:auto;
    margin-top: 50px;
    text-decoration: none;
    border-radius: 50%;
    transition: all 0.1s ease-in-out;
  }

  #btn_stjude:hover {
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
  }
  
  div#stjude {
    background-image: url(../assets/stjude.png);
    background-size: 175px 150px;
    width: 175px;
    height: 150px;
    transition: ease-in-out 0.4s;
    transform: translate3d(0, 0, -10px);
  }

  div#stjude:hover {
    transform: translate3d(0, 0, 25px);
  }



  #btn_npr {
    display: inline-block;
    position: relative;
    margin-top: 50px;
    text-decoration: none;
    border-radius: 50%;
    transition: all 0.4s;
  }

  #btn_npr i {
    transform: translate(0px, 90px) scale(0);
    z-index: 0;
  }

  div#npr {
    background-image: url(../assets/npr.png);
    background-size: 150px 150px;
    width: 150px;
    height: 150px;
    transition: all 0.2s;
  }

  #btn_npr:hover div#npr {
    margin-top: 10px;
    transition: all 0.2s;
  }

  #btn_npr:hover #npr-culture {
    transform: translate(-25px, 45px) scale(1.5);
    transition: all 0.3s;
    color: red;
  }

  #btn_npr:hover #npr-music {
    transform: translate(0px, 45px) scale(1.5);
    transition: all 0.2s;
    color: black;
  }

  #btn_npr:hover #npr-podcast {
    transform: translate(25px, 45px) scale(1.5);
    transition: all 0.3s;
    color: rgb(40, 61, 255);
  }


  #btn_mbg {
    display: inline-block;
    position: relative;
    margin-top: 50px;
    text-decoration: none;
    transition: all 1s;
  }

  div#mbg {
    background-image: url(../assets/mbg.png);
    background-size: 150px 150px;
    width: 150px;
    height: 150px;
    transition: all 1s;
  }

  div#mbg:hover {
    background-image: url(../assets/mbg-2.png);
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    transition: all 1s;
  }



  #btn_moo {
    display: inline-block;
    position: relative;
    background: rgb(159,255,179);
    background: linear-gradient(90deg, rgba(159,255,179,1) 0%, rgba(102,255,0,1) 100%);
    width: 200px;
    height: 100px;
    margin-top: 75px;
    text-decoration: none;
    transition: all 0.15s;
  }

 div#moo {
    background-image: url(../assets/moo.png);
    background-size: 200px 100px;
    width: 200px;
    height: 100px;
    transition: all 0.15s;
 }

 #btn_moo:hover {
    margin-top: 65px;
    padding: 10px;
    transition: all 0.13s;
 }

 #btn_moo:hover div {
  transform: scale(0.95);
  transition: all 0.2s;
}



#btn_instagram {
  display: inline-block;
  position: relative;
  width: 100px;
  height: 100px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
  border-radius: 40%;
}

div#instagram {
  background-image: url(../assets/instagram-1.png);
  background-size: 100px 100px;
  width: 100px;
  height: 100px;
  transform: scale(0.8);
  transition: all 0.15s;
}

#btn_instagram:hover div#instagram {
  background-image: url(../assets/instagram-2.png);
  transition: all 0.15s;
  transform: scale(1.2);
}



#btn_samsung {
  display: inline-block;
  position: relative;
  margin-left: auto;
  margin-right: auto;
  width: 150px;
  height: 150px;
  margin-top: 50px;
  text-decoration: none;
  transition: all 0.15s;
  border-radius: 50%;
}

div#samsung {
  background-image: url(../assets/samsung.png);
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 0.15s;
}

#btn_samsung:hover {
  transition: all 0.3s;
  transform: scale(1.2);
background: radial-gradient(circle, rgba(26,30,130,0.52) 0%, rgba(43,124,255,0.6666666666666667) 5%, rgba(26,30,130,0) 100%);
  border-radius: 50%;
}


#btn_sardellastl {
  display: inline-block;
  position: relative;
  margin-top: 45%;
  padding: 10px;
  text-decoration: none;
  text-transform: uppercase;
  font-weight: 800;
  font-size: 2rem;
  background-color: rgb(255, 220, 220);
  color: orange;
  transition: all 0.15s;
}


div#sardella {
  display: inline;
}

#btn_sardellastl:hover {
  transform: scale(1.2) rotate(10deg);
  border-radius: 10px;
}

#btn_sardellastl:hover div#sardella:nth-child(2) {
  color: coral;
}


#btn_bissingers {
  display: inline-block;
  position: relative;
  margin-top: 50px;
  padding: 10px;
  width: 1000px;
  height: 150px;
  transition: all 0.15s;
}

div#bissingers {
  background-image: url(../assets/bissingers-1.jpg);
  background-repeat: no-repeat;
  background-size: 225px 100px;
  width: 1000px;
  height: 150px;
  transition: all 0.15s;
}

#btn_bissingers:hover div#bissingers {
  background-size: contain;
  background-repeat: no-repeat;
  background-image: url(../assets/bissingers-2.jpg);
  background-size: 225px 100px;
  width: 1000px;
  height: 150px;
  transition: all 0.15s;
}

#btn_bissingers:hover div#bissingers{
  color: coral;
}

#btn_fitbit {
  display: inline-block;
  position: relative;
  width: 200px;
  height: 150px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
  border-radius: 50%;
}

div#fitbit {
  background-image: url(../assets/fitbit.jpg);
  background-repeat: no-repeat;
  background-size: 200px 100px;
  width: 200px;
  height: 150px;
  transition: all 0.15s;
  border-radius: 50%;
}

#btn_fitbit:hover div#fitbit {
  transform-origin: center;
  animation-name: spin;
  animation-duration: 1s;
  animation-iteration-count: 1;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}


#btn_velocity {
  display: inline-block;
  position: relative;
  width: 200px;
  height: 150px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
}

div#velocity {
  background-image: url(../assets/velocity.jpg);
  background-repeat: no-repeat;
  background-size: 200px 100px;
  width: 200px;
  height: 150px;
  transition: all 0.15s;
}

@keyframes rev {
  from { transform: skew(0deg); }
  25% {transform: skew(5deg); }
  45% { transform: skew(0deg); }
  65% { transform: skew(10deg); }
  to { transform: skew(-15deg);}
}

#btn_velocity:hover div#velocity {
  transform-origin: center;
  animation-name: rev;
  animation-duration: 1.5s;
  animation-iteration-count: 1;
  transform: skew(-10deg);
  transition: all 0.15s;
}


#btn_explodingkittens {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
}

div#explodingkittens {
  background-image: url(../assets/explodingcat-1.jpg);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 0.15s;
}

@keyframes explode {
  from { transform: rotate(-7deg); }
  15% { transform: rotate(4deg); }
  30% { transform: rotate(-7deg); }
  45% { transform: rotate(9deg); }
  60% { transform: rotate(-14deg); }
  75% { transform: rotate(17deg); }
  90% { transform: rotate(-24deg); }
  to { transform: rotate(35deg); }
}

#btn_explodingkittens:hover div#explodingkittens {
  background-repeat: no-repeat;
  transform-origin: center;
  animation-name: explode;
  animation-duration: 0.5s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  background-size: 150px 150px;
  width: 150px;
  transition: all 0.5s;
}


#btn_facebook {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
  border-color: #43609C;
  border-radius: 50%;
  padding: 10px;
}

div#facebook {
  background-image: url(../assets/facebook-1.png);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  
  width: 150px;
  height: 150px;
  transition: all 0.15s;
}

#btn_facebook:hover {
  border-radius: 20%;
  border-style: solid;
}

#btn_facebook:hover div#facebook {
  background-image: url(../assets/facebook-1.jpg);
}


#btn_nike {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 75px;
  text-decoration: none;
  transition: all 0.15s;
  padding: 10px;
}

div#nike {
  background-image: url(../assets/nike.png);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 1s;
}

@keyframes flip {
  from { transform: scale(1,1); }
  50% { transform: scale(-1,1); }
  to { transform: scale(1,1); }
}


#btn_nike:hover div#nike {
  transform-origin: center;
  animation-name: flip;
  animation-duration: 1s;
  animation-iteration-count: 1;

  background-image: url(../assets/nike-2.png);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 1s;
}



#btn_electra {
  display: inline-block;
  position: relative;
  width: 250px;
  height: 150px;
  margin-top: 50px;
  text-decoration: none;
  transition: all 0.15s;
  padding: 10px;
}

div#electra {
  background-image: url(../assets/electra.jpg);
  background-repeat: no-repeat;
  background-size: 250px 150px;
  width: 250px;
  height: 150px;
  transition: all 1s;
}

#btn_electra:hover div#electra {
  box-shadow: rgba(29, 195, 255, 0.4) 5px 5px, rgba(52, 177, 223, 0.4) 10px 10px, rgba(56, 157, 194, 0.4) 15px 15px;
  transition: all 0.1s;
}



#btn_hsn {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 50px;
  text-decoration: none;
  transition: all 0.15s;
  padding: 10px;
  border-radius: 50%;
}

div#hsn {
  background-image: url(../assets/hsn.png);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 0.1s;
}

#btn_hsn:hover div#hsn {
  border-radius: 50%;
  background-color: rgba(59, 121, 255, 0.705);
  transition: all 0.1s;
}



#btn_oldnavy {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 50px;
  text-decoration: none;
  transition: all 0.15s;
  padding: 10px;
  border-radius: 50%;
}

div#oldnavy {
  background-image: url(../assets/oldnavy-1.jpg);
  transform: scale(0.9);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 0.1s;
}

#btn_oldnavy:hover div#oldnavy {
  background-image: url(../assets/oldnavy-2.png);
  transform: scale(1);
  background-color: rgba(59, 121, 255, 0.705);
  transition: all 0.1s;
  border-radius: 25%;
}



#btn_mollyjogger {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 150px;
  margin-top: 50px;
  text-decoration: none;
  transition: all 0.15s;
  padding: 5px;
  background-color: rgba(190, 255, 210, 0.705);
  border-radius: 20%;
}

div#mollyjogger {
  background-image: url(../assets/mollyjogger.jpg);
  border-radius: 20%;
  transform: scale(0.9);
  background-repeat: no-repeat;
  background-size: 150px 150px;
  width: 150px;
  height: 150px;
  transition: all 0.1s;
}

#btn_mollyjogger:hover{ 
  padding: 20px;
}



#btn_mollyjogger:hover div#mollyjogger {
  transform: scale(1.1) rotate(15deg);
  
  transition: all 0.2s;
  border-radius: 25%;
}