@media (max-width: 1203px) {
  .container {
    max-width: 680px;
  }

  .container-main {
    max-width: 900px;
  }

  .headline {
    font-size: 24px;
  }

  .nav__item {
    font-size: 17px;
  }

  .footer__text {
    font-size: 15.5px;
  }
}

@media (max-width: 955px)  {
 .container {
  max-width: 625px;
 }

 .container-main {
   max-width: 820px;
 }

 .headline {
   font-size: 22px;
 }

 .nav__item {
   font-size: 17px;
 }

 .footer__text {
   font-size: 14.5px;
 }

 .doi {
  width: 70px;
  height: 70px;
 }

 .miptk {
   width: 180px;
   height: 70px;
 }

 .crossref {
   height: 70px;
 }
}

@media (max-width: 870px) {
 .container-main {
  max-width: 700px;
 }

 .journal__img {
   width: 280px;
 }
}

@media (max-width: 768px) {
  .container {
    max-width: 570px;
  }

 .container-main {
  max-width: 600px;
 }

 .journal__img {
   width: 230px;
 }

 .nav__item {
   font-size: 15.5px;
 }

 .headline__about {
   font-size: 22px;
 }

 .text__journal {
   font-size: 15px;
 }

 .headline {
   font-size: 20px;
 }
}

@media (max-width: 640px) {
 .container {
  max-width: 539px;
 }

 .container-main {
   display: flex;
   flex-direction: column;
   max-width: none;
 }

 .about__container {
   padding-left: 20px;
   padding-right: 20px;
 }

 .journal__container {
   display: flex;
   justify-content: center;
 }

 main {
   margin-bottom: 40px;
 }

 .footer__text {
   font-size: 14px;
 }

 .nav__item {
   font-size: 14.5px;
 }

 .headline {
   font-size: 19px;
 }
}

@media (max-width: 570px) {
 .headline__container {
   text-align: center;
 }

 .container {
   max-width: 460px;
 }

 .nav__item {
   font-size: 12.7px;
 }
}

@media (max-width: 490px) {
 .headline {
   font-size: 17px;
 }

 .nav__item {
   font-size: 12.5px;
 }

 .footer__text {
   font-size: 12.8px;
 }
 
 img {
     width: 90%;
 }
}

@media (max-width: 440px) {
 .container {
   max-width: 300px;
 }

 .nav__item {
   margin-right: 30px;
   font-size: 12px;
 }

 .footer__text {
   font-size: 12px;
 }

 .doi {
   width: 60px;
   height: 60px;
   margin-right: 0px;
 }

 .miptk {
   height: 60px;
   width: auto;
 }

 .crossref {
   height: 60px;
 }
}

@media (max-width: 400px) {
 .nav__item {
   margin-right: 25px;
   font-size: 11px;
 }

 .footer__text {
   font-size: 10.5px;
 }
}