input.accordion_full {
    display: none;
}

 label.accordion_full  {
    display: block;
    padding: 8px 22px;
    margin: 0 0 1px 0;
    cursor: pointer;
    background: linear-gradient(182deg, green, transparent);
    border-radius: 3px;
    color: #FFF;
    transition: ease .5s;
    position: relative; /* ADDING THIS IS REQUIRED */
}

label.accordion_full:hover {
    background:  linear-gradient(1deg, #4E8774, transparent);
}

label.accordion_full::after {
    content: '+';
    font-size: 22px;
    font-weight: bold;
    position: absolute;
    right: 10px;
    top: 2px;
}

input.accordion_full:checked + label.accordion_full::after {
    content: '-';
    right: 14px;
    top: 3px;
}

.content_full {
}
input.accordion_full + label.accordion_full + .content_full {
    display: none;
}

input.accordion_full:checked + label.accordion_full + .content_full {
    display: block;
}