upstream-zulip/web/styles/widgets.css

.widget-content {
    margin-bottom: var(--markdown-interelement-space-px);
}

.widget-choices {
    & ul {
        padding: 3px;
    }

    & li {
        padding: 2px;
        list-style: none;
    }

    & button {
        font-weight: 700;
        color: hsl(240deg 100% 50%);
        font-family: inherit;
        font-size: inherit;
    }

    .widget-choices-heading {
        font-weight: 600;
    }
}

.todo-widget {
    .todo-task-list-title-bar {
        flex: 1 1 auto;
        display: flex;
        /* Ensure controls remain visible on narrower screens. */
        flex-flow: row wrap;
        gap: 5px;
        margin-bottom: var(--markdown-interelement-space-px);
    }

    .add-task-bar {
        display: flex;
        /* Ensure controls remain visible on narrower screens. */
        flex-flow: row wrap;
        gap: 5px;
    }

    /* For the box-shadow to be visible on the left */
    .add-task,
    .add-desc {
        font-weight: 400;
    }

    & label.checkbox {
        display: flex; /* Arrange that a multi-line description line wraps properly. */
        /* Keep checkboxes vertically aligned, including with multi-line tasks. */
        align-items: baseline;
        /* Reset default label.checkbox styles. */
        gap: 5px;
        position: static;
        min-height: 0;

        & input[type="checkbox"] {
            ~ .custom-checkbox {
                display: inline-block;
                vertical-align: middle;
                position: static;

                padding: 2px;
                margin: 0;

                font-size: 1.3em; /* 18.2px / 14px em */
                height: 0.6593em; /* 12px at 18.2px / em */
                width: 0.6593em; /* 12px at 18.2px / em */

                font-weight: 300;
                line-height: 0.8;
                text-align: center;
                border: 2px solid var(--color-border-todo-checkbox);

                border-radius: 4px;
                filter: brightness(1);

                cursor: pointer;
            }

            &:checked ~ .custom-checkbox {
                background-image: url("../images/checkbox-white.svg");
                background-size: 75%;
                background-position: 50% 50%;
                background-repeat: no-repeat;
                background-color: var(--color-background-todo-checkbox-checked);
                border-color: var(--color-border-todo-checkbox-checked);
            }

            &:disabled ~ .custom-checkbox {
                opacity: 0.5;
                cursor: not-allowed;
            }

            &:hover ~ .custom-checkbox {
                border-color: var(--color-border-todo-checkbox-hover);
            }

            &:not(:checked):hover ~ .custom-checkbox {
                /* We only change the background color on hover,
                   when the checkbox is not checked. */
                background-color: var(--color-background-todo-checkbox-hover);
            }

            &:focus ~ .custom-checkbox {
                outline-color: hsl(0deg 0% 100% / 0%);
            }
        }
    }
}

.todo-widget,
.poll-widget {
    .poll-question-header,
    .todo-task-list-title-header {
        font-size: 1.1em;
        font-weight: 600;
        /* Zero out the margin inherited from Markdown styles;
           we place the margin here on the header-area class,
           making alignment of the flex items more predictable. */
        margin-bottom: 0;
    }

    & li {
        display: flex;
        gap: 5px;
        align-items: baseline;
        list-style: none;
        margin: 0 0 5px;
    }

    & ul {
        margin: 0 0 5px;
        padding: 0;
    }

    & input[type="text"] {
        /* Reset from zulip.css */
        height: unset;
        border: 1px solid hsl(0deg 0% 80%);
        box-shadow: inset 0 1px 1px hsl(0deg 0% 0% / 7.5%);
        border-radius: 4px;
        color: var(--color-text-default);
        font-family: inherit;

        &:focus {
            border-color: hsl(206deg 80% 62% / 80%);
            outline: 0;
            box-shadow: none;
            background-color: var(--color-background-widget-input);
            transition:
                border-color linear 0.2s,
                box-shadow linear 0.2s;
        }
    }
}

.poll-widget {
    .poll-option-bar {
        display: flex;
        /* Ensure controls remain visible on narrower screens. */
        flex-flow: row wrap;
        gap: 5px;
    }

    .poll-option {
        font-weight: 400;
    }

    .poll-option-label {
        display: flex;
        gap: 5px;
        align-items: baseline;
    }

    .poll-option-text {
        font-weight: 600;
        /* Start with max-content, but allow options
           to shrink, so that voting names wrap comfortably. */
        flex: 0 1 max-content;
    }

    .poll-vote {
        color: var(--color-poll-vote);
        border-color: var(--color-border-poll-vote);
        border-style: solid;
        font-weight: 600;
        border-radius: 3px;
        /* We don't want poll-vote tallies to spill
           digits onto second lines in narrow viewports. */
        flex-shrink: 0;
        min-width: 1.7857em; /* 25px at 14px / em */
        height: 1.7857em; /* 25px at 14px / em */
        font-size: 0.9285em; /* 13px at 14px / em */
        background-color: var(--color-background-widget-button);
        font-family: inherit;

        &:hover {
            color: var(--color-poll-vote-hover);
            background-color: var(--color-background-poll-vote-hover);
            border-color: var(--color-border-poll-vote-hover);
        }

        &:focus {
            outline: 0;
            color: var(--color-poll-vote-focus);
            background-color: var(--color-background-poll-vote-focus);
            border-color: var(--color-border-poll-vote-focus);
        }

        &:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
    }

    .poll-names {
        color: var(--color-poll-names);
        /* Aim for 50% of the flexbox for voting names,
           but also shrink modestly (.5) adjacent a long
           option. */
        flex: 1 0.5 50%;
    }
}

button {
    &.add-task,
    &.poll-option {
        color: hsl(156deg 41% 40%);
        border: 1px solid hsl(156deg 28% 70%);
        width: max-content;
        flex: 0 0 auto;
        border-radius: 3px;
        background-color: var(--color-background-widget-button);
        padding: 4px;
        padding-left: 14px;
        padding-right: 14px;
        font-family: inherit;
        font-size: inherit;

        &:hover,
        &:focus {
            outline: 0;
            border-color: hsl(156deg 30% 50%);
            transition: 0.2s ease;
            transition-property: background-color, border-color, color;
        }

        &:active {
            transition: 0.2s ease;
            transition-property: background-color, border-color, color;
        }

        &:disabled {
            cursor: not-allowed;
            filter: saturate(0);
            background-color: var(--color-background-zulip-button-disabled);
            color: hsl(0deg 3% 52%);
        }
    }
}

input {
    &.add-task,
    &.add-desc,
    &.poll-option,
    &.poll-question,
    &.todo-task-list-title {
        flex: 1 0 auto;
        padding: var(--input-vertical-padding) var(--input-horizontal-padding);
    }
}

.widget-error {
    color: hsl(1deg 45% 50%);
    font-size: 0.8571em; /* 12px at 14px/em */
    display: flex;
    align-items: center;
}

.poll-question-check,
.poll-question-remove,
.todo-task-list-title-check,
.todo-task-list-title-remove {
    display: flex;
    align-items: center;
    justify-content: center;
    align-self: stretch;
    /* TODO: Re-express the 30.5px value here
       as part of information density work. */
    flex: 0 0 30.5px;
    min-height: 30.5px;
    border-radius: 3px;
    border: 1px solid var(--color-border-zulip-button);
    background-color: var(--color-background-zulip-button);
    font-size: inherit;

    &:hover {
        border-color: var(--color-border-zulip-button-interactive);
        background-color: var(--color-background-zulip-button-hover);
    }
}

.poll-edit-question,
.todo-edit-task-list-title {
    padding: 0;
    border: none;
    background: none;
    font-size: inherit;
    color: var(--color-message-action-visible);
    cursor: pointer;
    /* We're going to offset this manually with margin-top,
       in ems, so the icon looks good even if a question
       or list title spans multiple lines. */
    align-self: flex-start;
    /* Give the icon its own flexbox, so it is sized
       nicely relative to the icon box. */
    display: flex;
    margin-top: 0.25em; /* 4px at 16px/1em; this is eyeballed, but correct. */

    &:hover,
    &:focus-visible {
        color: var(--color-message-action-interactive);
    }
}

.poll-question-bar {
    flex: 1 1 auto;
    display: flex;
    /* Ensure controls remain visible on narrower screens. */
    flex-flow: row wrap;
    gap: 5px;
    /* Reserve space for the focus outline to prevent it from being cut off */
    margin-right: 2px;
    margin-bottom: var(--markdown-interelement-space-px);
}

.poll-widget-header-area,
.todo-widget-header-area {
    display: flex;
    align-items: baseline;
    gap: 5px;
    /* Keep the expected margin under the heading, but place it
       here on the header area, rather than the heading itself,
       so the flexbox for aligning text and icon button is
       unaffected. */
    margin-bottom: var(--markdown-interelement-space-px);
}

.current-user-vote {
    background-color: hsl(156deg 10% 90% / 90%);
}

.add-task-wrapper {
    display: inline;
    position: relative;
    z-index: 1;

    /* Unlike other browsers like Chrome, Microsoft Edge, etc.,
    Firefox does not automatically display the "not-allowed"
    cursor for disabled elements. The below css ensures that the
    correct cursor is shown across all browsers. */
    &:hover {
        cursor: not-allowed;
    }
}