zulip/static/styles/input_pill.scss

.pill-container {
    display: inline-flex;
    flex-wrap: wrap;

    padding: 2px;
    border: 1px solid hsla(0, 0%, 0%, 0.15);
    border-radius: 4px;

    font-size: 0.9em;

    cursor: text;
}

.pill-container .pill {
    display: inline-flex;
    align-items: center;

    height: 20px;
    margin: 1px 2px;

    color: inherit;
    border: 1px solid hsla(0, 0%, 0%, 0.15);

    border-radius: 4px;
    background: hsla(0, 0%, 0%, 0.07);
    cursor: pointer;
}

.pill-container .pill:focus {
    color: #fff;
    border: 1px solid #108179;
    background: hsl(176, 49%, 42%);
    outline: none;
}

.pill-container.notmem {
    cursor: not-allowed;
    border: none;
}

.pill-container.notmem .pill {
    padding-right: 4px;
    cursor: not-allowed;
}

.pill-container.notmem .pill:focus {
    color: inherit;
    border: 1px solid hsla(0, 0%, 0%, 0.15);
    background: hsla(0, 0%, 0%, 0.07);
}

.pill-container.notmem .pill .exit {
    display: none;
}

.pill-container .input {
    display: inline-block;
    padding: 2px 4px;

    min-width: 2px;
    word-break: break-all;

    outline: none;
}

.pill-container .pill .pill-value {
    margin: 0 5px;
}

.pill-container .pill .exit {
    opacity: 0.5;
    font-size: 1.3em;
    margin-right: 3px;
}

.pill-container .pill:hover .exit {
    opacity: 1;
}

.pill-container .input.shake {
    animation: shake 0.3s cubic-bezier(.36, .07, .19, .97) both;
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
}

.pm_recipient .pill-container {
    padding: 0px 2px;
    border: none;

    align-content: center;
}

.pm_recipient .pill-container .input {
    height: 20px;
}

.pm_recipient .pill-container .input:first-child:empty::before {
    content: attr(data-no-recipients-text);
    opacity: 0.5;
}

.pm_recipient .pill-container .pill + .input:empty::before {
    content: attr(data-some-recipients-text);
    opacity: 0.5;
}

.pill-image {
    height: 20px;
    width: 20px;
    border-radius: 4px 0 0 4px;
}

@keyframes shake {
    10%,
    90% {
        transform: translate3d(-1px, 0, 0);
    }

    20%,
    80% {
        transform: translate3d(2px, 0, 0);
    }

    30%,
    50%,
    70% {
        transform: translate3d(-3px, 0, 0);
    }

    40%,
    60% {
        transform: translate3d(3px, 0, 0);
    }
}