Ghost/ghost/admin-x-settings/src/styles/preflight.css

.admin-x-settings {

    /*
    1. Prevent padding and border from affecting element width. (https://github.com/mozdevs/cssremedy/issues/4)
    2. Allow adding a border to an element by just adding a border-width. (https://github.com/tailwindcss/tailwindcss/pull/116)
    */

    *,
    ::before,
    ::after {
    box-sizing: border-box; /* 1 */
        max-width: revert;
        max-height: revert;
        min-width: revert;
        min-height: revert;
        border-width: 0; /* 2 */
        border-style: solid; /* 2 */
        border-color: theme('borderColor.DEFAULT', currentColor); /* 2 */
    }

    ::before,
    ::after {
        --tw-content: '';
    }

    /*
    1. Use a consistent sensible line-height in all browsers.
    2. Prevent adjustments of font size after orientation changes in iOS.
    3. Use a more readable tab size.
    4. Use the user's configured `sans` font-family by default.
    */

    html {
        line-height: 1.5; /* 1 */
        -webkit-text-size-adjust: 100%; /* 2 */
        -moz-tab-size: 4; /* 3 */
        tab-size: 4; /* 3 */
        font-family: theme('fontFamily.sans', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"); /* 4 */
    }

    /*
    1. Remove the margin in all browsers.
    2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
    */

    body {
        margin: 0; /* 1 */
        line-height: inherit; /* 2 */
    }

    /*
    1. Add the correct height in Firefox.
    2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
    3. Ensure horizontal rules are visible by default.
    */

    hr {
        height: 0; /* 1 */
        color: inherit; /* 2 */
        border-top-width: 1px; /* 3 */
    }

    /*
    Add the correct text decoration in Chrome, Edge, and Safari.
    */

    abbr:where([title]) {
        text-decoration: underline dotted;
    }

    /*
    Remove the default font size and weight for headings.
    */

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-size: inherit;
        font-weight: inherit;
    }

    /*
    Reset links to optimize for opt-in styling instead of opt-out.
    */

    a {
        color: inherit;
        text-decoration: inherit;
    }

    /*
    Add the correct font weight in Edge and Safari.
    */

    b,
    strong {
        font-weight: bolder;
    }

    /*
    1. Use the user's configured `mono` font family by default.
    2. Correct the odd `em` font sizing in all browsers.
    */

    code,
    kbd,
    samp,
    pre {
        font-family: theme('fontFamily.mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace); /* 1 */
        font-size: 1em; /* 2 */
    }

    /*
    Add the correct font size in all browsers.
    */

    small {
        font-size: 80%;
    }

    /*
    Prevent `sub` and `sup` elements from affecting the line height in all browsers.
    */

    sub,
    sup {
        font-size: 75%;
        line-height: 0;
        position: relative;
        vertical-align: baseline;
    }

    sub {
        bottom: -0.25em;
    }

    sup {
        top: -0.5em;
    }

    /*
    1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
    2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
    3. Remove gaps between table borders by default.
    */

    table {
        text-indent: 0; /* 1 */
        border-color: inherit; /* 2 */
        border-collapse: collapse; /* 3 */
    }

    /*
    1. Change the font styles in all browsers.
    2. Remove the margin in Firefox and Safari.
    3. Remove default padding in all browsers.
    */

    button,
    input,
    optgroup,
    select,
    textarea {
        font-family: inherit; /* 1 */
        font-size: 100%; /* 1 */
        font-weight: inherit; /* 1 */
        line-height: inherit; /* 1 */
        color: inherit; /* 1 */
        margin: 0; /* 2 */
        padding: 0; /* 3 */
    }

    /*
    Remove the inheritance of text transform in Edge and Firefox.
    */

    button,
    select {
        text-transform: none;
    }

    /*
    1. Correct the inability to style clickable types in iOS and Safari.
    2. Remove default button styles.
    */

    button,
        [type='button'],
        [type='reset'],
        [type='submit'] {
        -webkit-appearance: button; /* 1 */
        background-color: transparent; /* 2 */
        background-image: none; /* 2 */
    }

    /*
    Use the modern Firefox focus style for all focusable elements.
    */

    :-moz-focusring {
        outline: none;
    }

    /*
    Remove the additional `:invalid` styles in Firefox. (https://github.com/mozilla/gecko-dev/blob/2f9eacd9d3d995c937b4251a5557d95d494c9be1/layout/style/res/forms.css#L728-L737)
    */

    :-moz-ui-invalid {
        box-shadow: none;
    }

    /*
    Add the correct vertical alignment in Chrome and Firefox.
    */

    progress {
        vertical-align: baseline;
    }

    /*
    Correct the cursor style of increment and decrement buttons in Safari.
    */

    ::-webkit-inner-spin-button,
    ::-webkit-outer-spin-button {
        height: auto;
    }

    /*
    1. Correct the odd appearance in Chrome and Safari.
    2. Correct the outline style in Safari.
    */

    [type='search'] {
        -webkit-appearance: textfield; /* 1 */
        outline-offset: -2px; /* 2 */
    }

    /*
    Remove the inner padding in Chrome and Safari on macOS.
    */

    ::-webkit-search-decoration {
        -webkit-appearance: none;
    }

    /*
    1. Correct the inability to style clickable types in iOS and Safari.
    2. Change font properties to `inherit` in Safari.
    */

    ::-webkit-file-upload-button {
        -webkit-appearance: button; /* 1 */
        font: inherit; /* 2 */
    }

    /*
    Add the correct display in Chrome and Safari.
    */

    summary {
        display: list-item;
    }

    /*
    Removes the default spacing and border for appropriate elements.
    */

    blockquote,
    dl,
    dd,
    h1,
    h2,
    h3,
    h4,
    h5,
    h6,
    hr,
    figure,
    p,
    pre {
        margin: 0;
    }

    fieldset {
        margin: 0;
        padding: 0;
    }

    legend {
        padding: 0;
    }

    ol,
    ul,
    menu {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    /*
    Prevent resizing textareas horizontally by default.
    */

    textarea {
        resize: vertical;
    }

    /*
    1. Reset the default placeholder opacity in Firefox. (https://github.com/tailwindlabs/tailwindcss/issues/3300)
    2. Set the default placeholder color to the user's configured gray 400 color.
    */

    input::placeholder,
    textarea::placeholder {
        opacity: 1; /* 1 */
        color: theme('colors.grey.500'); /* 2 */
    }

    button:focus-visible,
    input:focus-visible {
        outline: none;
    }

    /*
    1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
    2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)
    This can trigger a poorly considered lint error in some tools but is included by design.
    */

    img,
    svg,
    video,
    canvas,
    audio,
    iframe,
    embed,
    object {
        display: block; /* 1 */
        vertical-align: middle; /* 2 */
    }

    /*
    Constrain images and videos to the parent width and preserve their intrinsic aspect ratio. (https://github.com/mozdevs/cssremedy/issues/14)
    */

    img,
    video {
        max-width: 100%;
        height: auto;
    }

}