.par_projektu {

    padding-bottom:40px;
    position: relative;
}

.par_projektu .inner-container{
        max-width:700px;
    margin:auto;
    text-align: left;
}


.par_projektu h3 {
    font-weight: bold;
    text-transform: uppercase;
     text-align: center;
}


.par_projektu::before {
    content: '';
    width: 120vw;
    height: 130%;
    margin-top: -10%;
    margin-left:-10vw;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #f2f2f2;
    z-index: -1;
    

  clip-path: polygon(
      5% 3%,       /* Top-left  */
      100% 0%,     /* Top-right point */
      100% 100%,    /* Bottom-right  */
      0% 90%      /* Bottom-left  */
  );

}