style.css

 body {
   font-family: sans-serif;
    
}

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
#map {
    height: 100vh;
    width: 75%;
}

main {
display: flex;
}

.store-list{
    width: 25%;
    height: 100vh;
    overflow: auto;
    background-color: whitesmoke;
}

.store-list .heading{
     background-color: #ff6900;
     color: #fff;
}

.store-list .heading h2{
    padding: 1rem
}

::-webkit-scrollbar{
    width: 3px;
    height: 3px;
    border-left: 0;
    background-color: rgba( 0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb{
    background-color: #ff6900;
    border-radius: 0;
}
.store-list ul.list{
 padding: 0 1rem;
 list-style-type: none;
}

.store-list .shop-item{
    margin:  1rem;
   border-bottom: 1px solid rgba( 0, 0, 0, 0.1);
   padding-bottom:  1rem;
}

.store-list li:last-child{
    border: none;
}
.store-list .shop-item a{
    text-decoration: none;
    font-size: 20px;
    color: #ff6900;
    font-weight: 700;
}
.store-list .shop-item p{
    font-size: 14px;
    color: #404040;
}
.leaflet-popup-content-wrapper {
   padding: 0;
   overflow: hidden;
}
.leaflet-popup-content-wrapper .leaflet-popup-content {
 margin: 0;
}
.leaflet-popup-content-wrapper h4{
    padding: 16px;
    background-color: #ff6900;
    color: #fff;
    font-size: 16px;
}
.leaflet-popup-content-wrapper p{
    padding: 0 16px;
    font-size:  14px;
    margin-bottom: 14px;
}
.leaflet-popup-content-wrapper .leaflet-popup-content .phone-number{
  padding: 16px;
  padding-top: 0;
}

.leaflet-popup-content-wrapper .leaflet-popup-content .phone-number a{
    color: #ff6900;
    font-size: 14px;
}