.mail_list_box{
    padding: 14px 16px;
    border-radius: 16px;
    background: #ffffff;
    margin-bottom: 12px;
    cursor: pointer;

    box-shadow:
            0 2px 10px rgba(0,0,0,.05);

    transition: all .2s ease;
    border: 1px solid #f1f1f1;
}

.mail_list_box:hover{
    transform: translateY(-2px);
    box-shadow:
            0 6px 18px rgba(0,0,0,.08);
}

.mail_header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.mail_sender{
    font-size: 15px;
    font-weight: 600;
    color: #222;

    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mail_time{
    font-size: 12px;
    color: #999;
    flex-shrink: 0;
}

.mail_subject{
    font-size: 16px;
    font-weight: 700;
    color: #003ce3;
    margin-bottom: 6px;

    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mail_preview{
    font-size: 14px;
    color: #666;
    line-height: 1.5;

    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;

    overflow: hidden;
}