style.css

body, html {
    margin: 0px;
    padding: 0px;
}
h1 {
    font-family: 'Trocchi', serif;
}
.h4, h4 {
    font-family: 'Raleway', sans-serif;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 5px;
}
hr {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0));
}
address span {
    border-bottom: solid 1px rgba(0, 0, 0, 0.3);
}
#map {
    height: 300px;
}
a {
    color: inherit;
}
.container-wraper {
    height: 100%;
    position: relative;
    background-image: url("imgs/jura.jpg");
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}
.nav-link:hover {
    color: azure;
}
@media (max-width: 925px) {
    #brand h1 {
        font-size: 4rem;
    }
    #brand h4 {
        font-size: 1rem;
    }
    .container {
        padding: 0;
    }
    .container a {
        font-size: 0.8rem;
        padding: 8px 12px;
    }
}
@media (max-width: 635px) {
    #brand h1 {
        font-size: 3rem;
    }
    #brand h4 {
        font-size: 0.75rem;
    }
}
@media (max-width: 485px) {
    #brand h1 {
        font-size: 2rem;
    }
    #brand h4 {
        font-size: 0.5rem;
    }
    .lead {
        font-size: 1rem;
    }
}
.fa-angle-up:hover {
    color: rgb(35, 38, 43, 0.7);
    cursor: pointer;
}
#topbutton {
    display: inline-block;
    text-align: center;
    position: fixed;
    bottom: 30px;
    right: 30px;
    transition: background-color .3s, 
      opacity .5s, visibility .5s;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
  }

  #topbutton.show {
    opacity: 1;
    visibility: visible;
  }