main.css

div {
    position: relative;
}

div input {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100% !important;
    height: auto !important;
    margin: 0;
    padding: 12px;
    background: linear-gradient(0deg, #fff 42%, rgba(255, 255, 255, 0) 100%);
    text-align: center;
    border: none !important;
    outline: none !important;
    appearance: none !important;
    box-shadow: none !important;
    cursor: pointer;
}

div input::before {
    content: 'Read More';
    color: #000 !important;
    font-size: 1.5em;
}

div input+article {
    height: 250px;
    overflow-y: hidden;
}

div input:checked {
    display: none !important;
}

div input:checked::before {
    content: '';
}

div input:checked+article {
    height: auto;
    overflow-y: auto;
}