server/core/css/tooltip.scss

/**
 * @copyright Copyright (c) 2016, John Molakvoæ <skjnldsv@protonmail.com>
 * @copyright Copyright (c) 2016, Robin Appelman <robin@icewind.nl>
 * @copyright Copyright (c) 2016, Jan-Christoph Borchardt <hey@jancborchardt.net>
 * @copyright Copyright (c) 2016, Erik Pellikka <erik@pellikka.org>
 * @copyright Copyright (c) 2015, Vincent Petry <pvince81@owncloud.com>
 *
 * Bootstrap v3.3.5 (http://getbootstrap.com)
 * Copyright 2011-2015 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */

.tooltip {
    position: absolute;
    display: block;
    font-family: 'Open Sans', Frutiger, Calibri, 'Myriad Pro', Myriad, sans-serif;
    font-style: normal;
    font-weight: 400;
    letter-spacing: normal;
    line-break: auto;
    line-height: 1.6;
    text-align: left;
    text-align: start;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    white-space: normal;
    word-break: normal;
    word-spacing: normal;
    word-wrap: normal;
    font-size: 12px;
    opacity: 0;
    z-index: 100000;
    /* default to top */
    margin-top: -3px;
    padding: 10px 0;
    filter: drop-shadow(0 1px 10px var(--color-box-shadow));
    &.in,
    &.tooltip[aria-hidden='false'] {
        visibility: visible;
        opacity: 1;
        transition: opacity .15s;
    }
    &.top .tooltip-arrow,
    &[x-placement^='top'] {
        left: 50%;
        margin-left: -10px;
    }
    &.bottom,
    &[x-placement^='bottom'] {
        margin-top: 3px;
        padding: 10px 0;
    }
    &.right,
    &[x-placement^='right'] {
        margin-left: 3px;
        padding: 0 10px;
        .tooltip-arrow {
            top: 50%;
            left: 0;
            margin-top: -10px;
            border-width: 10px 10px 10px 0;
            border-right-color: var(--color-main-background);
        }
    }
    &.left,
    &[x-placement^='left'] {
        margin-left: -3px;
        padding: 0 5px;
        .tooltip-arrow {
            top: 50%;
            right: 0;
            margin-top: -10px;
            border-width: 10px 0 10px 10px;
            border-left-color: var(--color-main-background);
        }
    }
    /* TOP */
    &.top,
    &.top-left,
    &[x-placement^='top'],
    &.top-right {
        .tooltip-arrow {
            bottom: 0;
            border-width: 10px 10px 0;
            border-top-color: var(--color-main-background);
        }
    }
    &.top-left .tooltip-arrow {
        right: 10px;
        margin-bottom: -10px;
    }
    &.top-right .tooltip-arrow {
        left: 10px;
        margin-bottom: -10px;
    }
    /* BOTTOM */
    &.bottom,
    &[x-placement^='bottom'],
    &.bottom-left,
    &.bottom-right {
        .tooltip-arrow {
            top: 0;
            border-width: 0 10px 10px;
            border-bottom-color: var(--color-main-background);
        }
    }
    &[x-placement^='bottom'] .tooltip-arrow,
    &.bottom .tooltip-arrow {
        left: 50%;
        margin-left: -10px;
    }
    &.bottom-left .tooltip-arrow {
        right: 10px;
        margin-top: -10px;
    }
    &.bottom-right .tooltip-arrow {
        left: 10px;
        margin-top: -10px;
    }
}

.tooltip-inner {
    max-width: 350px;
    padding: 5px 8px;
    background-color: var(--color-main-background);
    color: var(--color-main-text);
    text-align: center;
    border-radius: var(--border-radius);
}

.tooltip-arrow {
    position: absolute;
    width: 0;
    height: 0;
    border-color: transparent;
    border-style: solid;
}