Css Linkler Mozilla ve Explorer'da Açılmıyor

.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 6px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    width: 300px;
    font-size: 14px;
    margin: 1px 1px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}

.button a{
color:#FFFFFF;
}


.button1 {
    background-color: #27ae60; 
    color: white; 
    border: 2px solid #27ae60;
    a color:ffffff;
}

.button1:hover {
    background-color: #32ce74;
    color: white;
}

.button2 {
    background-color: #2980b9; 
    color: white; 
    border: 2px solid #2980b9;
}

.button2:hover {
    background-color: #3599db;
    color: white;
}

.button3 {
    background-color: #c0392b; 
    color: white; 
    border: 2px solid #c0392b;
}

.button3:hover {
    background-color: #e74c3c;
    color: white;
}

.button4 {
    background-color: #f39c12;
    color: white;
    border: 2px solid #f39c12;
}

.button4:hover {background-color: #f1c40f;}

.button5 {
    background-color: #2c3e50;
    color: white;
    border: 2px solid #2c3e50;
}

.button5:hover {
    background-color: #34495e;
    color: white;
}

.button6 {
    background-color: #8e44ad;
    color: white;
    border: 2px solid #8e44ad;
}

.button6:hover {
    background-color: #9b59b6;
    color: white;
}

.button7 {
    background-color: #7f8c8d;
    color: white;
    border: 2px solid #7f8c8d;
}

.button7:hover {
    background-color: #95a5a6;
    color: white;
}

.button8 {
    background-color: #f75e10;
    color: white;
    border: 2px solid #f75e10;
}

.button8:hover {
    background-color: #FF8040;
    color: white;
}

.button9 {
    background-color: #16a085;
    color: white;
    border: 2px solid #16a085;
}

.button9:hover {
    background-color: #1bc7a5;
    color: white;
}

.button10 {
    background-color: #3b5998;
    color: white;
    border: 2px solid #3b5998;
    padding: 16px 32px;
    width: 320px;
}

.button11 {
    background-color: #dc4a38;
    color: white;
    border: 2px solid #dc4a38;
    padding: 16px 32px;
    width: 320px;
}

.button12 {
    background-color: #00aced;
    color: white;
    border: 2px solid #00aced;
    padding: 16px 32px;
    width: 320px;
}

.button13 {
    background-color: #e52b25;
    color: white;
    border: 2px solid #e52b25;
    padding: 16px 32px;
    width: 320px;
}


.onceki {
  display: inline-block;
  border-radius: 4px;
  background-color: #88b7d5;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 14px;
  padding: 10px;
  width: 220px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}

.onceki span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.onceki span:after {
  content: '«';
  position: absolute;
  opacity: 0;
  top: 0;
  left: -20px;
  transition: 0.5s;
}

.onceki:hover span {
  padding-left: 25px;
}

.onceki:hover span:after {
  opacity: 1;
  left: 0;
}

.onceki a {text-decoration:none !important;color:#fff;}


.sonraki {
  display: inline-block;
  border-radius: 4px;
  background-color: #88b7d5;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 14px;
  padding: 10px;
  width: 220px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}


.sonraki span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.sonraki span:after {
  content: '»';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}

.sonraki:hover span {
  padding-right: 25px;
}

.sonraki:hover span:after {
  opacity: 1;
  right: 0;
}

.sonraki a {text-decoration:none !important;color:#fff;}