#search_suggestion_box {
    max-width: 400px;
    margin:0 auto;
    box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.2);
    text-align: left;
}
#search_field {
    box-sizing: border-box;
    font-size: 1.2em;
    border: none;
    margin-bottom: 0;
    padding-left: 10px;
    height: 45px;
    width: 400px;
}

#search_submit {
    box-sizing: border-box;
    left: calc(50% + 200px);
    position: absolute;
    float: right;
    height: 45px;
    line-height: 45px;
    vertical-align: center;
    background: #43a047;
    color: white;
    box-shadow: 3px 3px 6px 0 rgba(0, 0, 0, 0.2);
    text-decoration: none;
    outline: none !important;
    border: none;
    cursor: pointer;
    text-align: center;
    padding: 0 10px;
    border-radius: 0px 10px 10px 0px;
}

.suggestion_item {
    text-align: left;
    box-sizing: border-box;
    width: 100%;
    padding: 5px;
    cursor: pointer;
    border-top: 2px solid #dadada;
    margin: 0;
}
.suggestion_item.selected {
    background: rgb(200,200,200)
}

 @media only screen and (max-width: 500px) {
     #search_suggestion_box {
         width: 220px;
     }
     #search_submit {
         left: calc(50% + 110px);
     }
     #search_field {
         width: 220px;
     }
 }

 @media only screen and (max-width: 350px) {
      #search_suggestion_box {
         width: 160px;
     }
     #search_submit {
         left: calc(50% + 80px);
     }
     #search_field {
         width: 160px;
     }
 }