CSS Esercizio Debug (.css)

.top-bar, #search-box, .nav-list li, .nav-list a {
    background-color: #002D45;
    font-family: Proxima Nova,helvetica neue,helvetica,sans-serif;
    font-weight: bold;
    font-size: 110%;
    color: #ffffff;
}

.top-bar {
    color: #FFFFFF;
    height: 40px;
    margin: 0px;
    padding: 1px;
    display: flex;
    align-items: center;
}

.nav-list {
    list-style-type: none;
    padding: 0;
        display: inline;
}

.nav-list li {
        float: "left";
}

.nav-list a {
    display: inline;
    padding: 8px;
        text-decoration: none;
}

#search-box {
    margin-left: auto;
    margin-right: 0;
    padding: 10px;
 }

#search-controls {
    background-color: #ffffff;
    padding: 15px 15px;
    font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif;
    font-size: 70%;
    display: flex;
    align-items: center;
}


#filter-parts {
    float: right;
    margin-left: auto;
    margin-right: 0;
    padding-right: 5px;
 }

.catalog-part {
  margin: 2px;
  padding: 0px 5px;
  float: left;
  border-style: solid;
  border-color: #808285;
  border-width: 1px;
  width: 150px;
  height: 200px;
  line-height: 200px;
    display: table-cell;
  position: relative;
}

.catalog-part img {
  height: auto;
    vertical-align: middle;
  width: 100%;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: 0.5s ease;
  background-color: #f4f4f4;
    display: inline-table;
}

.catalog-part:hover .overlay {
  opacity: 0.75;
}

p {
    font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif;
  line-height: 1;
    overflow: scroll;
}

.catalog-part p {
    vertical-align: middle;
    text-align: center;
  color: black;
    display: table-cell;
    font-size: 80%;
    font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif;
}