material.css

.tooltipster-base {
    max-width: 50%;
}

.tooltipster-content img.wikilink {
    max-width: 10%;
}

.tooltip_templates, .tooltipster-arrow {
    display: none;
}

.tooltipster-content {
    font-size: 16px;
}

[data-md-color-scheme="slate"] .tooltipster-sidetip .tooltipster-box {
    background-color: #00000063 !important;
    border: none;
}

[data-md-color-scheme="default"] .tooltipster-sidetip .tooltipster-box {
    background-color: hsla(0, 0%, 100%, 0.9) !important;
    border: none;
}

[data-md-color-scheme="default"] .tooltipster-sidetip .tooltipster-content {
    color: black !important;
    font-family: var(--md-text-font-family);
}