/* Make the assignment box green and add a paper icon */
.admonition.assignment-box {
    border-color: #2e7d32;              /* green border */
}

.admonition.assignment-box > .admonition-title {
    background-color: #2e7d32;          /* green title bar */
    background-image: none !important;  /* remove theme's default '!' */
}

/* Paper icon, colored to match the title text */
.admonition.assignment-box > .admonition-title::before {
    content: "📝";
    font-size: 1.1em;
    margin-right: .45em;
    vertical-align: -0.15em;
    color: inherit;                      /* match title color */
}