style.css

*{
    margin: 0;
    padding: 0;
    font-family: 'Amiri', serif;
}

body{
    margin: 0 auto;
    box-sizing: border-box;
    background-color: #f8f8f8;
}

div#wrap{
    margin: 0 auto;
    box-sizing: border-box;
    margin-top: 20px;
    width: 400px;
    height: 160px;
    background-color: #F0F0F0;
    border: 1px solid #D3D3D3;
    border-radius: 5px;
    transition: all 1s ease;
    -webkit-transition: all 1s ease;
}

div#wrap h1{
    font-size: 22px;
    margin: 5px;
    text-align: center;
    color: #0d4aa4;
    line-height: 44px;
    font-weight: bold;
}

div#wrap input{
    display: block;
    width: 200px;
    height: 40px;
    text-align: center;
    margin: 3px auto;
    border-radius: 5px;
    font-size: 16px;
    line-height: 20px;
    color: #2C2022;
    padding: 0px 15px;
    padding-top: 10px;
    padding-bottom: 8px;
    background-color: #FFFFFF;
    border: 1px solid #C1C1C1;
    border-radius: 5px;
    outline: none;
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
}

div#wrap input:focus {
    background-color: lightgoldenrodyellow;
    transform: scale(1.08, 1.08)
}

div#wrap input:hover, select:hover {
    background-color: lightgoldenrodyellow;
}

div#przycisk{
    width: 82px;
    display: block;
    margin: 10px auto;
}

button{
    display: inline-block;
    cursor: default;
    font-size: 15px;
    line-height: 15px;
    color: #FFFFFF;
    background-color: rgba(13, 71, 164, 0.78);
    padding: 10px 20px;
    margin: 0 auto;
    text-align: center;
    /background-image: linear-gradient(-45deg, green 10%, blue);
    text-transform: capitalize;
    border: none;
    border-radius: 5px;
    transition: all .5s ease;
}

button:hover{
    background-color: red;
    background-color: rgba(58, 134, 255, 0.92);
}

div#properties{
    visibility: hidden;
    opacity: 0;
    transition: all 1.2s ease;
    -webkit-transition: all 1.2s ease;
    width: auto;
}

div#is_correct_div{
    display: block;
    display:table-cell;
    vertical-align: middle;
    width: 400px;
    height: 70px;
    text-align: center;
    margin: 0 auto;
    font-size: 18px;
    line-height: 20px;
    color: #2C2022;
    padding: 5px 20px;
    /background-color: #FFFFFF;
    /border: 1px solid #C1C1C1;
    /border-radius: 3px;
    outline: none;
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
}

.element{
    text-align: center;
    font-size: 16px;
    display: block;
    /vertical-align: middle;
    width: 300px;
    height: 20px;
    text-align: center;
    margin: 4px auto;
    font-size: 15px;
    line-height: 20px;
    color: #2C2022;
    padding: 10px;
    background-color: #FFFFFF;
    border: 1px solid #C1C1C1;
    border-radius: 3px;
    outline: none;
}