zulip/web/styles/reactions.css

.message_reactions {
    overflow: hidden;
    user-select: none;

    &:has(.message_reaction) {
        margin-bottom: var(--message-box-markdown-aligned-vertical-space);
    }

    .message_reaction_container {
        &.disabled {
            cursor: not-allowed;
        }
    }

    .message_reaction {
        display: flex;
        /* Set a pixel and half padding to maintain
           pill height adjacent own reactions. */
        padding: 1.5px 4px 1.5px 3px;
        box-sizing: border-box;
        min-width: 44px;
        cursor: pointer;
        color: var(--color-message-reaction-text);
        background-color: var(--color-message-reaction-background);
        border: 1px solid var(--color-message-reaction-border);
        border-radius: 21px;
        align-items: center;
        box-shadow: inset 0 0 5px 0 var(--color-message-reaction-shadow-inner);
        transition:
            transform 100ms linear,
            font-weight 100ms linear; /* stylelint-disable-line plugin/no-low-performance-animation-properties */

        &.reacted {
            color: var(--color-message-reaction-text-reacted);
            background-color: var(--color-message-reaction-background-reacted);
            border-color: var(--color-message-reaction-border-reacted);
            /* Make this border thicker by half a pixel,
               to make own reactions more prominent. */
            border-width: 1.5px;
            /* Reduce the padding top and bottom by half
               a pixel accordingly, to maintain the same
               pill height. */
            padding: 1px 4px 1px 3px;
            font-weight: var(--font-weight-message-reaction);
            box-shadow: none;
        }

        &.disabled {
            pointer-events: none;
        }

        &:hover {
            background-color: var(--color-message-reaction-background-hover);
        }

        &:active {
            transform: scale(var(--scale-message-reaction-active));
        }

        .emoji {
            margin: 1px 3px;
            /* 17px at 14px/1em */
            height: 1.2143em;
            width: 1.2143em;
            /* Preserve the emoji's dimensions, no
               matter what the flexbox does. */
            flex-shrink: 0;
            /* Don't inherit position: relative; from
               the base .emoji class. */
            position: static;
        }

        .emoji_alt_code {
            /* Apply the same margins as on graphical emoji. */
            margin: 1px 3px;
            font-size: 0.8em;
        }
    }

    .message_reaction_count {
        /* 90% works out here to 12.6px */
        font-size: 90%;
        /* No top and bottom margin; just allow
           flexbox to handle the vertical alignment. */
        margin: 0 3px;
        /* Set the 12.6px text on a 13px line;
           the goal is to center correctly on the
           vertical with square emoji, resulting in
           equal space above and below the reaction
           count/name.
           13px at 12.6/1em */
        line-height: 1.0317em;
    }

    .message_reaction:hover .message_reaction_count {
        color: var(--color-message-reaction-button-text-hover);
    }

    &:hover .reaction_button {
        visibility: visible;
        pointer-events: all;
    }

    .emoji-message-control-button-container {
        display: flex;
        align-items: center;
    }

    .reaction_button {
        visibility: hidden;
        pointer-events: none;
        /* Set top/bottom padding to accommodate borders
           and padding around reaction pills. */
        padding: 4px 6px;
        border-radius: 21px;
        color: var(--color-message-reaction-button-text);
        background-color: var(--color-message-reaction-button-background);
        border: 1px solid var(--color-message-reaction-button-border);

        & i {
            font-size: 1em;
            color: var(--color-message-reaction-button-text);
        }

        &:hover i {
            color: var(--color-message-reaction-button-text-hover);
        }

        &:hover {
            color: var(--color-message-reaction-button-text-hover);
            background-color: var(
                --color-message-reaction-button-background-hover
            );
            border: 1px solid var(--color-message-reaction-button-border-hover);
            border-color: var(--color-message-reaction-button-border-hover);
            box-shadow: inset 0 0 5px 0
                var(--color-message-reaction-shadow-inner);
            cursor: pointer;
            opacity: 1;
        }

        .message_reaction_count {
            font-weight: 700;
            color: var(--color-message-reaction-button-text);
            margin-right: 0;
            line-height: 14px;
        }

        &:hover .message_reaction_count {
            color: var(--color-message-reaction-button-text-hover);
        }
    }
}

.active-emoji-picker-reference,
.active-playground-links-reference {
    visibility: visible !important;
    pointer-events: all !important;
    opacity: 1 !important;
}

.emoji-picker-popover {
    padding: 0;
    user-select: none;

    .emoji-popover {
        width: 16.6667em; /* 250px at 15px/em */

        .emoji-popover-category-tabs {
            /* Flex needed here to work around #7511 (90% zoom issues in firefox) */
            display: flex;
            background-color: var(--color-background-emoji-picker-popover);
            width: 100%;
            box-sizing: border-box;
            overflow: hidden;

            .emoji-popover-tab-item {
                font-size: 1.0667em; /* 16px at 15px/em */
                display: inline-block;
                padding-top: 0.5em; /* 8px at 16px/em */
                width: 1.5625em; /* 25px at 16px/em */
                height: 1.5625em; /* 25px at 16px/em */
                text-align: center;
                cursor: pointer;
                /* Flex needed here to work around #7511 (90% zoom issues in firefox) */
                flex-grow: 1;

                &.active {
                    background-color: var(
                        --color-background-emoji-picker-popover-tab-item-active
                    );
                }
            }
        }

        .emoji-popover-emoji-map,
        .emoji-search-results-container {
            padding: 0;
            position: relative;
            overflow: hidden auto;
            display: block;
            width: 16.4667em; /* 247px at 15px/em */
            padding-left: 0.2em; /* 3px at 15px/em */
        }

        .emoji-popover-emoji-map {
            height: 16.6667em; /* 250px at 15px/em */

            .emoji-popover-subheading {
                font-weight: 600;
                padding: 0.3333em 0.2em; /* 5px 3px at 15px/em */
            }
        }

        .emoji-popover-emoji {
            display: inline-block;
            margin: 0;
            padding: 0.4em; /* 6px at 15px/em */
            cursor: pointer;
            border-radius: 0.5em;
            height: 1.6667em; /* 25px at 15px/em */
            width: 1.6667em; /* 25px at 15px/em */

            &:focus {
                background-color: var(
                    --color-background-emoji-picker-emoji-focus
                );
                /* Only dark mode takes a box shadow on
                   the emoji-picker's focused emoji. */
                box-shadow: 0 0 1px
                    var(--color-box-shadow-emoji-picker-emoji-focus);
                outline: none;
            }

            &.reacted {
                background-color: var(
                    --color-background-emoji-picker-emoji-reacted
                );
                border-color: var(--color-border-emoji-picker-emoji-reacted);
            }

            &.reacted:focus {
                background-color: var(
                    --color-background-emoji-picker-emoji-reacted-focus
                );
            }

            &.hide {
                display: none;
            }

            .emoji {
                height: 1.6667em; /* 25px at 15px/em */
                width: 1.6667em; /* 25px at 15px/em */
            }
        }

        .emoji-search-results-container {
            /* Keep it hidden initially to avoid it taking extra height
               when the emoji popover is initially rendered which can
               cause the popover to render at incorrect position when
               the search container is hidden `onMount`. */
            display: none;
            height: 18.8667em; /* 283px at 15px/em */

            .emoji-popover-results-heading {
                font-size: 1.1333em; /* 17px at 15px/em */
                font-weight: 600;
                padding: 0.2941em 0.1765em 0.1765em 0.2941em; /* 5px 3px 3px 5px at 17px/em */
            }
        }
    }

    .emoji-showcase-container {
        position: relative;
        background-color: var(--color-background-emoji-picker-popover);
        min-height: 2.9333em; /* 44px at 15px/em */
        width: 16.6667em; /* 250px at 15px/em */
        border-radius: 0 0 6px 6px;

        .emoji-preview {
            position: absolute;
            width: 2.1333em; /* 32px at 15px/em */
            height: 2.1333em; /* 32px at 15px/em */
            left: 0.3333em; /* 5px at 15px/em */
            top: 0.4em; /* 6px at 15px/em */
            margin-top: 0;
        }

        .emoji-canonical-name {
            font-size: 1.0667em; /* 16px at 15px/em */
            position: relative;
            top: 0.75em; /* 12px at 16px/em */
            margin-left: 3.125em; /* 50px at 16px/em */
            font-weight: 600;
            white-space: nowrap;
            text-overflow: ellipsis;
            overflow: hidden;
        }
    }
}

.typeahead .emoji {
    top: 2px;
}