html,
body {
  height: 100%;
}
* {
  box-sizing: border-box;
}
body {
  background-size: cover;
  background-repeat: no-repeat;
  background-position: top center;
  text-align: center;
  margin: 0;
  padding: 0;
  /*min-height: 600px; 


    @media(min-height: 600px){
        min-height: 700px; 
    }

    @media(min-height: 800px){
        min-height: 800px; 
    }
    @media(min-height: 900px){
        min-height: 900px; 
    }*/
}
body .content {
  display: flex;
  height: 100%;
  align-items: center;
  background: rgba(255, 255, 255, 0.85);
}
body .content > div {
  width: 100%;
}
.btn {
  display: inline-block;
  min-width: 10rem;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  color: #fff;
  font-family: 'Lato', sans-serif;
  text-decoration: none;
  font-weight: 300;
  text-transform: uppercase;
  background: transparent;
  margin: 0 .5rem;
  text-align: center;
}
.btn.amma {
  background: #ff7829;
  border: 1px solid #ff7829;
}
.btn.stowarzyszenie {
  background: #800000;
  border: 1px solid #800000;
}
.btn:hover,
.btn:active,
.btn:focus {
  background: transparent;
}
.btn:hover.amma,
.btn:active.amma,
.btn:focus.amma {
  border-color: #ff7829;
  color: #ff7829;
}
.btn:hover.stowarzyszenie,
.btn:active.stowarzyszenie,
.btn:focus.stowarzyszenie {
  border-color: #800000;
  color: #800000;
}
h1 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 56px;
  line-height: 50px;
  color: #000;
  text-transform: uppercase;
  margin-bottom: 2.3rem;
  margin-top: 0rem;
}
h1 span {
  display: block;
  text-align: center;
  font-family: "Kaushan Script", cursive;
  font-size: 22px;
  color: #000;
  text-transform: none;
}
@media (max-width: 767px) {
  .content {
    padding: 0 1rem;
  }
  .btn {
    min-width: 8rem;
    padding: 0.8rem 2rem;
    font-size: 1.2rem;
  }
  h1 {
    font-size: 4rem;
    line-height: 4rem;
    margin-bottom: 2.3rem;
    margin-top: 1rem;
  }
  h1 span {
    font-size: 2.5rem;
  }
}
@media (max-width: 640px) {
  .btn {
    min-width: 8rem;
    display: block;
    width: 80%;
    margin: 0 auto .5rem;
    padding: 0.8rem 0rem;
    font-size: 1.2rem;
  }
  h1 {
    font-size: 3rem;
    line-height: 3rem;
    margin-bottom: 2.3rem;
    margin-top: 1rem;
  }
  h1 span {
    font-size: 1.5rem;
  }
}