#addCompanyForm div input, #addCompanyForm div textarea
{
   width: 100%;
}

input[type="submit"]
{
   width: calc(100% + 5px);
}

article, footer
{
   max-width: 920px;
   width: calc(100% - 40px);
   padding: 0 20px;
}

header #search
{
   max-width: 900px;
   width: calc(100% - 20px);
}

header #search input[type="text"]
{
   width: calc(100% - 120px);
}

@media (max-width: 900px)
{
   .companies-1
   {
      width: 100%;
      float: none;
   }

   .companies-2
   {
      width: 100%;
      float: none;
   }
}

@media (max-width: 530px)
{
   header #nav ul li
   {
      display: block;
      padding: 5px 20px;
   }

   header h1
   {
      margin-top: 116px;
   }

   .company div:first-child, .company div:nth-child(2)
   {
      width: 100%;
      float: none;
   }

   footer ul li, footer ul li:first-child, footer ul li:last-child
   {
      display: block;
      padding: 5px 20px
   }
}