*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;

}

body {
    background-color: #081b29;
    color: aliceblue;
}

.header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 10%;
    background: transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;

}

.logo{
    position: relative;
    font-size: 25px;
    color: aliceblue; 
    text-decoration: none;
    text-align: center  ;
}    

.logo img{
    position: relative;
    font-size: 25px;
    color: aliceblue; 
    text-decoration: none;
    font-weight: 600;
    width: 40%;
    align-items: left;
}


.navbar a {
    font-size: 18px;
    color: aliceblue;
    text-decoration: none;
    font-weight: 500;
    margin-left: 35px;
    transition: .3s;
}

.navbar a:hover,
.navbar a.active {
     color: #00abf0;
}

.nadpis{
    text-align: center;
    padding-top: 13%;
    font-size: larger;
}

.nadpis h1:hover{
    color: #00abf0;
}

.prace{
    text-align: center;
    align-items: center;
    margin-left: 5%;

}

.prace a{
    text-decoration: none;
    color: #ffffff;
}

.prace1{
    float: left;
    margin: 5%;
    border-style: solid;
    border-radius: 2.5%;
    border-color: #00abf0;
    outline: 2px solid #00abf0;
    outline-offset: +10px;
    padding: 12% 5% 10% 5%;
    background-color: #03a0df;
    position: relative;
}

.prace2{
    float: left;
    margin: 5%;
    border-style: solid;
    border-radius: 2.5%;
    border-color: #00abf0;
    outline: 2px solid #00abf0;
    outline-offset: +10px;
    padding: 12% 7% 10% 7%;
    background-color: #03a0df;
    position: relative;
}

.prace3{
    float: left;
    margin: 5%;
    border-style: solid;
    border-radius: 2.5%;
    border-color: #00abf0;
    outline: 2px solid #00abf0;
    outline-offset: +10px;
    padding: 12% 7% 10% 7%;
    background-color: #03a0df;
    position: relative;
}


.overlay {
    border-radius: 2.5%;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #ffffff;
    overflow: hidden;
    width: 100%;
    height: 0;
    transition: .5s ease;
  }
  
  .prace1:hover .overlay {
    height: 100%;
  }

  .prace2:hover .overlay {
    height: 100%;
  }

  .prace3:hover .overlay {
    height: 100%;
  }

  .text {
    color: #00abf0;
    font-size: 25px;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    text-align: center;
  }

.text a {
    color: #00abf0;
}

.footer{
    float: left;
    text-align: center;
    margin-left: 47%;
}