.pkp_head_wrapper{
  background-color: #08080800;
}

.pkp_site_name .is_text {
    color: #dde5f100 !important;
}

body {
    line-height: 2.1;
}

.pkp_structure_head {
    background-color: #08080a;
    border-bottom: 1px solid #0a0a0a;
}

.pkp_structure_footer_wrapper {
    background-color: #080606;
}

.pkp_site_nav_menu {  
    background: #080808;

}

img {
    width: 100px;
    height: 100px;
}
img {
    width: 200px;
    height: 200px;
}
img {
    max-width: 100%;
    width
Specifies the width of the content area, padding area or border area (depending on 'box-sizing') of certain boxes.

Widely available across major browsers (Baseline since January 2018)
Learn more

Don’t show
: auto;
    height: auto;
}

/* Primera imagen específica */
img[src*="https://www.elanet-se.org/wp-content/uploads/2020/11/UMSS-Logo.png"] {
    width: 100px !important;
    height: auto !important;
    max-width: 20%;
}

/* Segunda imagen específica */
img[src*="https://revistas.umss.edu.bo/public/site/images/oarellano/mceclip0.png"] {
     width: 100px !important;
    height: auto !important;
    max-width: 20%;
}