moodle/lib/editor/atto/styles.css

.editor_atto_content_wrap {
    background-color: white;
    color: #333;
}
.editor_atto_content {
    padding: 4px;
    resize: vertical;
    overflow: auto;
}

.editor_atto_content_wrap,
.editor_atto + textarea {
    width: 100%;
    padding: 0;
    border: 1px solid #BBB;
    border-top: none;
}

.editor_atto + textarea {
    border-radius: 0;
    resize: vertical;
    margin-top: -1px;
}

div.editor_atto_toolbar {
    display: block;
    background: #F2F2F2;
    min-height: 35px;
    border: 1px solid #BBB;
    width: 100%;
    padding: 0 0 9px 0;
}

div.editor_atto_toolbar button {
    padding: 3px 9px;
    background: none;
    border: 0;
    margin: 0;
    border-radius: 0;
    cursor: pointer;
 }

div.editor_atto_toolbar button + button {
   border-left: 1px solid #CCC;
}

div.editor_atto_toolbar button[disabled] {
    opacity: .45;
    background: none;
    cursor: default;
}

.editor_atto_toolbar button:hover {
    background-image: radial-gradient(ellipse at center, #ffffff 60%,#dfdfdf 100%);
    background-color: #ebebeb;
}

.editor_atto_toolbar button:active, .editor_atto_toolbar button.highlight {
    background-image: radial-gradient(ellipse at center, #ffffff 40%,#dfdfdf 100%);
    background-color: #dfdfdf;
}

/* Make firefox button sizes match other browsers */
div.editor_atto_toolbar button::-moz-focus-inner {
    border:0;
    padding:0;
}

div.editor_atto_toolbar button img.icon {
    padding: 0px;
    margin: 2px 0;
    /* The following is dedicated to the beloved IE8, clashing with Bootstrap. God bless you IE. */
    vertical-align: text-bottom;
    width: auto;
    height: auto;
}

div.editor_atto_toolbar div.atto_group {
    display: inline-block;
    border: 1px solid #CCC;
    border-bottom: 1px solid #B3B3B3;
    border-radius: 4px;
    margin: 9px 0 0 9px;
    background: #FFF;
}

.editor_atto_content img {
    resize: both; overflow: auto;
}

.atto_hasmenu {
    /* IE8 places the images on top of each other if that is not set. */
    white-space: nowrap;
}

.atto_menuentry img {
    width: 16px;
    height: 16px;
}

.atto_menu {
    background: white;
    padding: 1px;
    white-space: inherit;
}

.atto_menu a {
    color: black;
}
.atto_menuentry {
    clear: left;
}

.atto_menuentry h1,
.atto_menuentry h2,
.atto_menuentry p {
    margin: 4px;
}


.atto_form label.sameline {
    display: inline-block;
    min-width: 10em;
}
.atto_form textarea.fullwidth,
.atto_form input.fullwidth {
    width: 100%;
}
.atto_form {
    padding-left: 30px;
    padding-right: 30px;
}
.atto_form label {
    display: block;
    margin: 0 0 5px 0;
}

/* RTL Rules */
body.dir-rtl div.editor_atto_toolbar button + button {
    border-left: 0;
    border-right: 1px solid #CCC;
}

body.dir-rtl div.editor_atto_toolbar img.icon {
    padding: 0;
}

body.dir-rtl div.editor_atto_toolbar div.atto_group {
    margin: 9px 9px 0 0;
}

.atto_control {
    position: absolute;
    right: -6px;
    bottom: -6px;
    display: none;
    cursor: pointer;
}
.atto_control img {
    background-color: white;
}
div.editor_atto_content:focus .atto_control,
div.editor_atto_content:hover .atto_control {
    display: block;
}

.yui3-menu-hidden {
    display: none;
}
.editor_atto_controlmenu li {
    list-style-type: none;
    padding: 0;
    margin: 0;
}
.editor_atto_controlmenu ul {
    padding: 0;
    margin: 0;
}
.editor_atto_controlmenu .moodle-dialogue-hd,
.editor_atto_controlmenu .moodle-dialogue-ft {
    display: none;
}

.editor_atto_controlmenu ul li a:active,
.editor_atto_controlmenu ul li a:hover {
    background-color: #0088cc;
    color: white;
}
.editor_atto_controlmenu ul li a {
    color: #333;
    padding: 2px;
    padding-left: 6px;
    padding-right: 6px;
    border-radius: 2px;
    display: block;
}

/* Get broken images back in firefox */
.editor_atto_content img:-moz-broken {
    -moz-force-broken-image-icon:1;
    min-width:24px;
    min-height:24px;
}

.moodle-dialogue-base .editor_atto_menu .moodle-dialogue-content .moodle-dialogue-bd {
    position: absolute;
    text-align:left;
    z-index: 1000;
    display: block;
    background-color: #fff;
    border: 1px solid #ccc;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
    -webkit-box-shadow: 5px 5px 20px 0 #666666;
    -moz-box-shadow: 5px 5px 20px 0 #666666;
    box-shadow: 5px 5px 20px 0 #666666;
    padding: 0px;
}

.editor_atto_menu .menu {
  margin: 0px;
}

.editor_atto_menu .menu a {
    display: block;
    padding: 4px 1em 4px 1em;
    color: #333333;
}

.editor_atto_menu .menu a:hover {
    color: #ffffff;background-color: #0088cc;
}
.editor_atto_menu .menu a.hidden {
    display: none;
}
.editor_atto_menu .menu img {
    vertical-align: middle;
}
.editor_atto_menu .menu > li {
    display: block;
}