.papers {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
}

.papers .paper {
    position: relative;
    width: calc(100%/4 - 20px);
    aspect-ratio: 20/21;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid #999;
    padding: 5px;
    margin-inline-end: 20px;
    margin-block-end: 20px;
}

.papers .paper button {
    aspect-ratio: 1/1;
    border: none;
    outline: none;
    background-color: #999;
    color: #fff;
    font-weight: 700;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    inset-block-start: 10px;
    inset-inline-end: 10px;
    border-radius: 50%;
    opacity: 0.5;
}

.papers .addmore {
    border-style: dashed;
}

.papers .addmore i {
    aspect-ratio: 1/1;
    width: 60px;
    border: 3px dashed #999;
    border-radius: 50%;
    font-size: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #999;
    position: absolute;
    inset-block-start: 50%;
    inset-inline-start: 50%;
    transform: translate(-50%, -50%);
}

.papers .addmore input {
    cursor: pointer;
    opacity: 0;
    position: absolute;
    inset: 0;
    z-index: 2;
}

.papers .paper button:hover {
    opacity: 0.9;
}

.papers .paper img {
    width: 100%;
    height: 100%;
    border-radius: 5px;
    object-fit: contain;
}