/**
 * Form
 * --
 * Contains all of the CSS used to format a standard form layout.
--------------------------------------------------------------------------------
<form
    action="#"
    method="get"
    class="mh-form"
    >
    <fieldset class="mh-form__fieldset">
        <legend class="mh-form__legend">My legend</legend>

        <div class="[ mh-form__field ]  [ mh-field ]">
            <div class="mh-field__control">
                <label class="mh-field__label" for="full-name">
                    <span class="mh-field__label-text">
                        Full name
                    </span>
                </label>

                <input
                    class="mh-field__text"
                    id="full-name"
                    name="full_name"
                    type="text"
                    >
            </div>
        </div>

        <div class="[ mh-form__field ]  [ mh-field  mh-field--btns ]">
            <button
                class="[ mh-field__btn ]  [ btn ]"
                type="submit"
                >
                <span class="mh-field__btn-text">
                    Submit
                </span>
            </button>

            <a
                class="[ mh-field__btn ]  [ btn ]"
                href="#"
                >
                <span class="mh-field__btn-text">
                    Cancel
                </span>
            </a>
        </div>
    </fieldset>
</form>
--------------------------------------------------------------------------------
 */


/**
 * Set the maximum width of the `.mh-field` element. This also affects the width
 * of the aside element when visible on desktop.
 */
$field_width: 600px;


/**
 * Form
 * --
 * Styles used to format the main form container, fieldset, legends, and notes.
 */
.mh-form {
    padding: 0;

    &:first-child { margin-top: 0; }
    &:last-child { margin-bottom: 0; }

    /**
     * Reverse optional
     * --
     * Class used on the form to reverse the behaviour of optional field labels
     * where-in all required fields will read `(Required)` and all optional
     * fields will be blank.
     */
    &--reverse-optional {
        .mh-field__label {
            &-text {
                &:after {
                    color: $color-font-light;
                    content: ' (Required)';
                    display: inline;
                }
            }

            &--optional {
                .mh-field__label-text {
                    &:after {
                        display:none;
                    }
                }
            }
        }
    }

    /**
     * Fixed buttons
     * --
     * Class added using javascript which detects if the height of the page is
     * larger than the user's window. Class is applied to either the `.mh-form` or
     * `.mh-form__fieldset` depending on whether or not the `.mh-field--btns` are
     * wrapped in a `.mh-form__fieldset` or not.
     */
    &--fixed-btns {
        padding-bottom: 75px;
        padding-top: 0;

        @include media-mobile() {
            padding-bottom: 55px;
        }

        @include media-tablet-portrait() {
            padding-bottom: 69px;
        }

        > :first-child {
            padding-top: 20px;
        }

        .mh-field--btns {
            box-shadow:
                0 -5px 5px -1px rgba(0, 0, 0, 0.05),
                0 -1px 0 0 rgba(0, 0, 0, 0.05);
            background-color: #fff;
            max-width: 1160px;
            padding: 20px;
            width: 100%;
            z-index: 1001;
            display: flex;
            @include position(fixed, null null 0px null);
            @include transition(box-shadow 0.2s ease-in-out);

            @include media-mobile() {
                width: calc(100% - 40px);
            }

            @include media-tablet-landscape() {
                width: calc((100% - #{$nav-width-min}) - 40px);
            }

            @include media-desktop() {
                width: calc((100% - #{$nav-width-max}) - 40px);
            }

            .mh-field__btn {
                max-width: 186.666666667px;
                margin: 0 20px 0 0;

                @include media-span($from: 0, $to: $tablet-portrait-width) {
                    @include btn-size(small);
                }

                &:last-child { margin-right: 0; }
            }

            /**
             * If the page has any actions against it, push the form buttons
             * further from the bottom to accommodate for actions on mobile.
             */
            .mh-body--has-actions & {
                @include media-span($from: 0, $to: $tablet-landscape-width) {
                    bottom: $action-height;
                }
            }
        }

        .mh-field--anchored {
            box-shadow: 0 -1px 0 0 rgba(0, 0, 0, 0.1);
        }
    }

    &__fieldset {
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        padding: 20px;

        &:last-child { border-bottom: none; }
    }

    &__legend {
        float: left;
        display: block;
        margin-bottom: 20px;
        width: 100%;
        @include type(h3);

        &:last-child { margin-top: 0; }
    }

    &__field {
        clear: left;
        margin-top: 20px;
        max-width: $field_width;

        &:first-child { margin-top: 0; }
    }

    /**
     * Asides are similar to form notes, but aappear to the right of a field
     * when in desktop mode. Useful for adding information about one or more
     * fields in a fieldset.
     */
    &__aside {
        margin-top: 20px;
        max-width: $field-width;

        @include media-span($from: 0, $to: $desktop-width) {
            color: $color-font-light;
        }

        @include media-desktop() {
            background-color: lighten($color-bkg-main, 2%);
            border-radius: $corner-radius;
            clear: both;
            float: right;
            padding: 20px;
            width: calc(100% - 620px);

            &:first-of-type {
                margin-top: 0;
            }

            &--label-above {
                margin-top: 47px;
            }
        }

        &:first-child { margin-top: 0; }
    }

    /**
     * Form notes / paragraphs. NOTE: This should be added to any paragraph or
     * note container in order to correctly space it from the other fields.
     */
    &__note {
        margin-top: 20px;
        color: $color-font-light;

        @include media-tablet-landscape() {
            max-width: $field_width;
        }

        &:first-child { margin-top: 0; }
    }
}

/**
 * Field
 * --
 * Fields inside of a form. This includes text inputs, textareas, select
 * dropdowns, booleans, etc.
 */
.mh-field {
    @include clearfix;
    flex-grow: 0;

    @include media-mobile() {
        display: flex;
    }

    @include media-desktop() {
        .mh-form__aside:first-child + & {
            margin-top: 0;
        }
    }

    /**
     * Custom layouts
     * --
     * By default most layouts can be handled without needing to apply any
     * custom classes to the container. In those cases, simply insert the fields
     * the flex box will split the space evenly between them. However in cases
     * where you need the layout to be none fixed, or you have a single control
     * in a field that you want to be shorter than the rest, you need to use the
     * custom layouts below.
     */
    &--2-4 {
        @include media-mobile() {
            > :nth-child(1) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(2) {
                flex-basis: column_width(4, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    &--4-2 {
        @include media-mobile() {
            > :nth-child(1) {
                flex-basis: column_width(4, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(2) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    &--3-3 {
        @include media-mobile() {
            > :nth-child(1),
            > :nth-child(2) {
                flex-basis: column_width(3, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    &--2-2-1 {
        @include media-mobile() {
            > :nth-child(1) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(2) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(3) {
                flex-basis: column_width(1, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    &--1-2-2 {
        @include media-mobile() {
            > :nth-child(1) {
                flex-basis: column_width(1, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(2) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(3) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    &--2-2-2 {
        @include media-mobile() {
            > :nth-child(1) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(2) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }

            > :nth-child(3) {
                flex-basis: column_width(2, 6, $field_width);
                flex-grow: 0;
            }
        }
    }

    /**
     * Btns
     * --
     * A field that contains the main submit button for the form. Usually
     * positioned at the bottom of the form in the last fieldset.
     */
    &--btns {
        margin: 20px 0;
        max-width: none;

        @include media-mobile() {
            align-items: center;
            display: flex;
        }

        @include media-tablet-portrait() {
            margin: 30px 0;
        }

        &:first-child { margin-top: 0; }
        &:last-child { margin-bottom: 0; }

        .mh-form > & {
            margin-top: 0;
            padding: 20px;
        }

        .mh-field__btn,
        > * {
            margin: 20px 0;

            @include media-mobile() {
                max-width: 186.666666667px;
                margin: 0 20px 0 0;

                &:last-child { margin-right: 0; }
            }

            &:first-child { margin-top: 0; }
            &:last-child { margin-bottom: 0; }
        }

        > * {
            align-items: center;
            display: flex;
            max-width: none;
        }

        > .mh-form__note {
            display: block;
        }
    }

    &__control {
        flex: 1 0;
        margin-top: 20px;
        max-width: 100%;
        position: relative;
        z-index: 1;

        @include media-mobile() {
            margin: 0 20px 0 0;
            flex: 1 1;

            &:last-child { margin-right: 0; }
        }

        &:first-child { margin-top: 0; }

        &:hover {
            z-index: 2;
        }

        /**
         * This class is applied to every field by default. However, when the
         * field is focused-on or filled-in, the styles change below.
         */
        &--focused,
        &--filled {
            .mh-field {
                &__label {
                    padding: 8px 10px 0;
                    @include type(13px 13px, $color: $color-font-light);
                }
                &__label-text {
                    background-color: #fff;
                    box-shadow: 10px 0 0 0 #fff;
                }

                &__text,
                &__select,
                &__textarea,
                &__asset {
                    line-height: 200%; /* IE11 ignores padding */
                    padding-top: 18px;

                    @include placeholder {
                        color: $color-font-light !important;
                    }
                }

                &__select {
                    color: $color-font;
                    padding-top: 18px;
                }

                &__textarea {
                    padding-top: 24px;
                }
            }
        }

        &--focused { z-index: 3; }

        /**
         * Position field label above the field rather than inside the field.
         * This style is added by default to tick fields and tick list fields.
         */
        &--label-above {
            .mh-field {
                &__text,
                &__select,
                &__textarea,
                &__asset {
                    padding-left: 20px;
                    padding-top: 0;

                    @include placeholder {
                        color: $color-font-light;
                    }
                }

                &__textarea {
                    padding: 20px;
                }

                &__select {
                    color: $color-font;
                }
            }

            > .mh-field__label {
                color: inherit;
                cursor: default;
                display: block;
                font-weight: 400;
                padding: 0 0 3px;
                pointer-events: auto;
                position: static;
                text-overflow: clip;
                white-space: normal;
                @include type(standard, $font-weight: 500);
            }
        }

        /**
         * Shrink the width of the field control element so that it is only as
         * wide as it needs to be. This is usefuly if you do not want a field to
         * stretch the entire width of the form.
         */
        &--shrink {
            flex: 0 0 auto;
        }

        /**
         * A class added to the `field__control` element whenever there is an
         * error against the field. For certain fields, a pop up error message
         * is shown whenever the field is focused-on or active.
         */
        &--error {
            > .mh-field__label {
                color: $color-alert-error !important;
                padding-right: 39px;

                .mh-field__label-text {
                    margin-right: 5px;
                }
            }

            .mh-field__error {
                display: block;
                margin-top: 5px;
                padding-left: 21px;
                position: relative;

                &-icon {
                    background-color: $color-alert-error;
                    border-radius: 50%;
                    display: block;
                    height: 16px;
                    margin-top: -8px;
                    pointer-events: none;
                    width: 16px;
                    @include position(absolute, 50% null null 0px);

                    &:before, &:after {
                        background-color: #fff;
                        content: '';
                        display: block;
                        height: 8px;
                        margin: -4px 0 0 -1px;
                        width: 2px;
                        @include position(absolute, 50% null null 50%);
                    }

                    &:before {
                        @include transform(rotate(45deg));
                    }

                    &:after {
                        @include transform(rotate(-45deg));
                    }
                }

                &-text {
                    color: $color-alert-error;
                    @include type-size(map-get($types, standard));
                }
            }

            .mh-field__text,
            .mh-field__select,
            .mh-field__textarea,
            .mh-field__asset {
                padding-right: 39px;

                &:focus {
                    box-shadow:
                        0 3px 0 0 $color-alert-error,
                        inset 0 -1px 0 0 $color-alert-error,
                        inset 0 1px 0 0 rgba(0, 0, 0, 0.25),
                        inset -1px 0 0 0 rgba(0, 0, 0, 0.25),
                        inset 1px 0 0 0 rgba(0, 0, 0, 0.25),
                        inset 0 3px 3px 0 rgba(0, 0, 0, 0.1);
                    color: $color-font;
                }

                + .mh-field__error,
                + * + .mh-field__error {
                    margin-top: 0;
                    padding-left: 0;

                    .mh-field__error-text {
                        background-color: $color-bkg-nav;
                        border-radius: $corner-radius;
                        max-width: 220px;
                        opacity: 0;
                        padding: 5px 10px;
                        pointer-events: none;
                        @include position(absolute, null 0px calc(#{$field-standard-height} - 6px) null);
                        @include transition(opacity 0.2s ease-in-out);
                        @include type(small, $color: #fff);

                        &:before {
                            content: '';
                            display: block;
                            @include position(absolute, 100% 21px null null);
                            @include triangle(10px, $color-bkg-nav, down);
                        }
                    }

                    .mh-field__error-icon {
                        height: 26px;
                        width: 26px;
                        @include position(absolute, auto 13px 12px auto);

                        &:before, &:after {
                            height: 14px;
                            margin: -7px 0 0 -2px;
                            width: 4px;
                        }
                    }
                }
            }

            .mh-field__select {
                background-position: top 50% right 50px;
                padding-right: 59px;
            }

            .mh-field__tick {
                .mh-field__tick-input {
                    &:focus + .mh-field__label {
                        &:before {
                            box-shadow:
                                0 0 0 1px $color-alert-error,
                                inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                        }
                    }

                    &:checked:focus + .mh-field__label {
                        &:before {
                            box-shadow:
                                0 0 0 1px rgba(0, 0, 0, 0.15),
                                0 0 0 1px $color-alert-error,
                                inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                        }
                    }
                }

                .mh-field__label {
                    color: $color-font !important;
                }
            }

            .mh-field__text {
                + .mh-field__error,
                + * + .mh-field__error {
                    height: $field-standard-height;
                    pointer-events: none;
                    position: absolute;
                    top: 0;
                    width: 100%;
                }
            }
        }
    }

    &__label {
        cursor: text;
        padding: 0 20px;
        pointer-events: none;
        text-align: left;
        z-index: 2;
        @include ellipsis();
        @include position(absolute, 0px null null 0px);
        @include transition(
            color 0.2s ease-in-out,
            font-size 0.2s ease-in-out,
            font-weight 0.2s ease-in-out,
            line-height 0.2s ease-in-out,
            padding 0.2s ease-in-out
            );
        @include type(standard, $font-weight: 400, $line-height: $field-standard-height);

        &--optional {
            > .mh-field__label-text {
                &:after {
                    color: $color-font-light;
                    content: ' (Optional)';
                    display: inline;
                }
            }

            &.mh-field__label--required {
                > .mh-field__label-text {
                    &:after {
                        display: none;
                    }
                }
            }
        }

        .mh-field__error {
            display: inline;
            margin-top: 0;
            padding-left: 0;

            .mh-field__error-text {
                vertical-align: middle;

                &::before {
                    content: ' - ';
                    display: inline;
                }
            }

            .mh-field__error-icon {
                display: inline-block;
                left: auto;
                margin: 0 0 -3px 5px;
                position: relative;
                top: auto;
            }
        }
    }


    /**
     * Consistent formatting across text fields, select fields, and textarea
     * fields.
     */
    &__text,
    &__select,
    &__textarea,
    &__asset {
        background-clip: padding-box;
        background-color: #fff;
        border: none;
        border-radius: $corner-radius;
        box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.15);
        display: block;
        height: $field-standard-height;
        margin: 0;
        padding: 0 10px;
        text-align: left;
        width: 100%;
        @include transition(
            line-height 0.2s ease-in-out,
            padding 0.2s ease-in-out
            );
        @include type(
            standard,
            $color: $color-font,
            $font-weight: 400,
            $line-height: $field-standard-height
            );

        @include placeholder {
            color: #fff !important;
            @include transition(color 0.2s ease-in-out);
            @include type(
                standard,
                $font-weight: 300,
                $line-height: $field-standard-height
                );

            .mh-body--no-transitions & {
                @include transition(none);
            }
        }

        &:hover {
            box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.25);
        }

        &:focus {
            box-shadow:
                0 3px 0 0 nth($color-themes, 1),
                inset 0 -1px 0 0 nth($color-themes, 1),
                inset 0 1px 0 0 rgba(0, 0, 0, 0.25),
                inset -1px 0 0 0 rgba(0, 0, 0, 0.25),
                inset 1px 0 0 0 rgba(0, 0, 0, 0.25),
                inset 0 3px 3px 0 rgba(0, 0, 0, 0.1);
            color: $color-font;
        }
    }

    &__text--small {
        height: $field-small-height;
        line-height: $field-small-height;

        @include placeholder {
            color: $color-font-light !important;
            line-height: $field-small-height;
        }
    }

    /**
     * Select
     * --
     * Custom formatting for select dropdown fields
     */
    &__select {
        background:
            #fff
            url($manhattan-manage-asset-root + '/icon-arrow-down.svg')
            right 15px top 50%
            no-repeat;
        background-size: 9px 4px;
        color: #fff;
        cursor: pointer;
        padding-right: 24px;
        @include appearance(none);

        &:-moz-focusring {
            color: transparent;
            text-shadow: 0 0 0 $color-font;
        }

        &::-ms-expand {
            display: none;
        }
    }

    /**
     * Textarea
     * --
     * Custom formatting for textarea fields
     */
    &__textarea {
        height: 200px;
        min-height: 200px;
        line-height: 165% !important;
        padding-top: 16px;
        padding-bottom: 10px;
        resize: vertical;
        @include type-size(map-get($types, standard));

        @include placeholder {
            @include type-size(map-get($types, standard));
        }

        &--shrink {
            height: 100px;
            min-height: 100px;
        }

        &--grow {
            height: 300px;
            min-height: 300px;
        }
    }

    /**
     * Ticks
     * --
     * A container for showing a list of ticks
     */
    &__ticks {
        margin-top: -5px;

        &--flexible {
            .mh-field__tick {
                display: inline-block;
                margin-right: 20px;
            }
        }

        &--split {
            @include media-mobile() {
                display: flex;
                flex-wrap: wrap;

                .mh-field__tick {
                    width: 50%;
                }
            }
        }

        .mh-field__tick {
            margin-top: 5px;
        }
    }

    /**
     * Tick
     * --
     * A container for a single tick and it's associated label. The tick input
     * is actually hidden, and instead the associated label is used to format
     * a "fake" tick instead.
     */
    &__tick {

        /**
         * The tick input is actually hidden by default, and the associated
         * label is used to format a "fake" tick instead.
         */
        &-input {
            @include homer();

            & + .mh-field__label {
                cursor: pointer;
                display: inline-block;
                overflow: visible;
                padding: 0 0 0 29px;
                pointer-events: auto;
                position: relative;
                text-overflow: clip;
                white-space: normal;
                @include type(standard, $font-weight: 400);

                &:hover {
                    &:before {
                        box-shadow:
                            inset 0 0 0 1px rgba(0, 0, 0, 0.25),
                            inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                    }
                }

                &:before {
                    background-color: #fff;
                    border-radius: $corner-radius;
                    box-shadow:
                        inset 0 0 0 1px rgba(0, 0, 0, 0.15),
                        inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                    content: '';
                    display: block;
                    height: 19px;
                    margin-top: -10px;
                    width: 19px;
                    @include position(absolute, 50% null null 0px);
                }

                .mh-field__label-text {
                    &:after {
                        display: none;
                    }
                }
            }

            /**
             * A rounded style is used for tick fields with a type of radio.
             */
            &[type='radio'] + .mh-field__label {
                &:before {
                    border-radius: 50%;
                }

                &:after {
                    background-color: #fff;
                    border-radius: 50%;
                    content: '';
                    display: none;
                    height: 7px;
                    margin-top: -4px;
                    width: 7px;
                    @include position(absolute, 50% null null 6px);
                }
            }

            /**
             * A square style is used for tick fields with a type of checkbox.
             */
            &[type='checkbox'] + .mh-field__label {
                &:after {
                    border-bottom: 3px solid #fff;
                    border-right: 3px solid #fff;
                    content: '';
                    display: none;
                    height: 12px;
                    margin-top: -8px !important;
                    width: 7px;
                    @include position(absolute, 50% null null 6px);
                    @include transform(rotate(45deg));
                }
            }

            &:focus + .mh-field__label {
                &:before {
                    box-shadow:
                        0 0 0 1px nth($color-themes, 1),
                        inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                }
            }

            &:checked + .mh-field__label {
                &:before { background-color: nth($color-themes, 1); }
                &:after { display: block !important; }
            }

            &:checked:focus + .mh-field__label {
                &:before {
                    box-shadow:
                        0 0 0 1px rgba(0, 0, 0, 0.15),
                        0 0 0 1px nth($color-themes, 1),
                        inset 0 -5px 8px -2px rgba(0, 0, 0, 0.15);
                }
            }
        }
    }


    /**
     * Btn
     * --
     * A button used to submit the form.
     */
    &__btn {
        margin: 20px 0;

        &:first-child { margin-top: 0; }
        &:last-child { margin-bottom: 0; }
    }
}


/**
 * Pinned field errors.
 */
.mh-pinned-field-error {
    background-color: $color-bkg-nav;
    border-radius: $corner-radius;
    display: block;
    max-width: 220px;
    padding: 5px 10px;
    pointer-events: none;
    position: absolute;
    z-index: 1000;
    @include type(small, $color: #fff);

    &:before {
        content: '';
        display: block;
        @include position(absolute, 100% 21px null null);
        @include triangle(10px, $color-bkg-nav, down);
    }
}