styles.css

 .accordion{
     max-width: 400px;
     box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
     border-radius: 5px;
     overflow: hidden;
     font-family: Verdana, Geneva, Tahoma, sans-serif;
     background: #009578;

 }

 .accordion__label, .accordion__content{
     padding: 14px 20px;
 }

 .accordion__label{
     display: block;
     color: white;
     font-weight: 500;
     cursor: pointer;
     position: relative;
     transition: background 0.1s;
 }

 .accordion__label:hover{
     background: rgba(0, 0, 0, 0.1);
 }

 .accordion__label::after{
     content: "";
     position: absolute;
     top: 50%;
     transform: translateY(-50%);
     right: 20px;
     width: 12px;
     height: 6px;
     background-image: url('data:image/svg+xml;utf8,<svg width="100" height="50" xmlns="http://www.w3.org/2000/svg"><polygon points="0,0 100,0 50,50" style="fill:%23FFFFFF99;" /></svg>');
     background-size: contain;
     transition: transform 0.4s;
 }

 .accordion__content{
     background-color: #ffffff;
     line-height: 1.6;
     font-size: 0.85em;
     display: none;
 }

 .accordion__input{
     display: none;
 }

 .accordion__input:checked ~ .accordion__content{
     display: block;
 }

 .accordion__input:checked ~ .accordion__label::after{
     transform: translateY(-50%) rotate(0.5turn);
 }