Template:Threaded Talk/styles.css

/* Neutralize MediaWiki's default colon indenting (<dl><dd>) to prevent double-indents */
.thread-comment dl,
.thread-comment dd {
    margin: 0 !important;
    padding: 0 !important;
}

.thread-dt-marker {
  border: 0 ;
  clip-path: inset(50%) ;
  height: 1px ;
  margin: -1px ;
  overflow: hidden ;
  padding: 0 ;
  position: absolute ;
  width: 1px ;
  white-space: nowrap;
}

/* Base thread container styling */
.thread-container {
    position: relative;
    border-left: 2px solid #edeff1;
    margin-left: 12px;
    padding-left: 14px;
    padding-bottom: 6px;
    margin-top: 4px;
}

.thread-container:hover {
    border-left-color: #0079d3; 
    background-color: rgba(0, 121, 211, 0.03);
}

.thread-container:hover > .thread-body {
    background-color: rgba(0, 121, 211, 0.02);
}

.thread-container:hover .thread-container:hover {
    background-color: transparent;
}

.thread-container:hover .thread-container:hover:hover {
    border-left-color: #0079d3;
    background-color: rgba(0, 121, 211, 0.03);
}

.thread-container.mw-collapsed .mw-collapsible-content {
    display: none;
}

/* The toggle button positioned directly over the border line */
.thread-toggle {
    position: absolute;
    left: -9px;
    top: 2px;
    width: 16px;
    height: 16px;
    background-color: #ffffff12;
    font-size: 14px;
    color: #878a8c;
    cursor: pointer;
    text-align: center;
    line-height: 14px;
    user-select: none;
    z-index: 1;
}

.thread-toggle:hover {
    color: #0079d3;
}

/* Dynamically change the icon based on MW's aria-expanded state */
.thread-toggle[aria-expanded="true"]::before {
    content: "–"; /* Minus sign when thread is open */
    font-weight: bold;
}

.thread-toggle[aria-expanded="false"]::before {
    content: "+"; /* Plus sign when thread is collapsed */
    font-weight: bold;
}

/* Spacing and typography */
.thread-replies {
    margin-top: 4px;
}

.thread-comment {
    margin-top: 4px;
    color: #1c1c1c;
    line-height: 1.5;
}

.thread-comment-text {
    padding-bottom: 8px;
}

.thread-body {
    margin-top: 0;
    padding-left: 0;
}