styles.css

.atto_chemistry_library .yui3-tabview-list {
    border: none;
}

.atto_chemistry_library .yui3-tab-selected .yui3-tab-label, .yui3-skin-sam #atto_chemistry_library .yui3-tab-selected .yui3-tab-label:focus, .yui3-skin-sam #atto_chemistry_library .yui3-tab-selected .yui3-tab-label:hover {
    background: none;
    color: black;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
}

.atto_chemistry_library button {
    min-width: 31px;
    padding: 0px;
    margin: 0px;
}
.yui3-skin-sam .yui3-tabview-panel {
    padding-left: 2px;
    padding-right: 2px;
}
#page-admin-setting-atto_chemistry_settings .form-defaultinfo {
    max-height: 10em;
    overflow: auto;
    padding: 0px;
    margin: 0px;
    min-width: 206:px;
}
.atto_form {
    padding-left: 4px;
    padding-right: 4px;
}
.atto_form .atto_chemistry_preview {
    margin-bottom: 0px; /* Turn off the margin-bottom from the class "well" */
}