Trello modifications CSS. Smaller fonts, larger cards, more info in one screen.

mods.css

h3.list-card-title a {
    font-size: 11px;
}

div.action-comment p {
    font-size: 11px;
}

a.inline-object.action-card {
    font-size: 12px;
}

p.date {
    font-size: 11px;
}

h2.hide-on-edit.current {
    font-size: 12px;
}

div.window-main-col-content.clearfix {
    font-size: 12px;
}

div.window-sidebar {
    font-size: 12px;
}

div.window {
    left: 70px;
    top: 10px;
}

div.window-wrapper.clearfix {
    width: 900px;
}

div.window-main-col {
    width: 670px;
}

div.window-header.clearfix {
    width: 801px;
}

a.button-link.highlight-icon {
    font-size: 11px;
    padding-top: 2px;
    padding-bottom: 2px;
}

div.board-widget-title h3 {
    font-size: 12px;
    margin-bottom: 0;
}

div.board-widgets {
    font-size: 11px;
    width: 260px;
}

.member, img.member-avatar {
    height: 20px;
    width: 20px;
}

.member .status {
    height: 4px;
    width: 4px;
}

div.action-comment {
    padding: 2px;
}

.list {
    padding: 1px;
}

#board {
    margin-right: 280px;
}

textarea.new-card {
    padding: 0;
    font-size: 10px;
}

.add-list-card {
    margin: 0 22px 0 4px;
    position: relative;
}

.list-card {
    font-size: 11px;
    line-height: 130%;
}