`-`

` all receive top and bottom margins. We nuke the top // margin for easier control within type scales as it avoids margin collapsing. h1, h2, h3, h4, h5, h6 { margin-top: 0; margin-bottom: .5rem; } // Reset margins on paragraphs // // Similarly, the top margin on `

`s get reset. However, we also reset the // bottom margin to use `rem` units instead of `em`. p { margin-top: 0; margin-bottom: 1rem; } // Abbreviations abbr[title], // Add data-* attribute to help out our tooltip plugin, per https://github.com/twbs/bootstrap/issues/5257 abbr[data-original-title] { cursor: help; } address { margin-bottom: 1rem; font-style: normal; line-height: inherit; } ol, ul, dl { margin-top: 0; margin-bottom: 1rem; } ol ol, ul ul, ol ul, ul ol { margin-bottom: 0; } dt { font-weight: $dt-font-weight; } dd { margin-bottom: .5rem; margin-left: 0; // Undo browser default } blockquote { margin: 0 0 1rem; } // // Links // a { color: $link-color; text-decoration: $link-decoration; @include hover-focus { color: $link-hover-color; text-decoration: $link-hover-decoration; } } // And undo these styles for placeholder links/named anchors (without href) // which have not been made explicitly keyboard-focusable (without tabindex). // It would be more straightforward to just use a[href] in previous block, but that // causes specificity issues in many other styles that are too complex to fix. // See https://github.com/twbs/bootstrap/issues/19402 a:not([href]):not([tabindex]) { color: inherit; text-decoration: none; @include hover-focus { color: inherit; text-decoration: none; } &:focus { outline: 0; } } // // Code // pre { // Remove browser default top margin margin-top: 0; // Reset browser default of `1em` to use `rem`s margin-bottom: 1rem; // Normalize v4 removed this property, causing `

` content to break out of wrapping code snippets
  overflow: auto;
}


//
// Figures
//

figure {
  // Normalize adds `margin` to `figure`s as browsers apply it inconsistently.
  // We reset that to create a better flow in-page.
  margin: 0 0 1rem;
}


//
// Images
//

img {
  // By default, ``s are `inline-block`. This assumes that, and vertically
  // centers them. This won't apply should you reset them to `block` level.
  vertical-align: middle;
  // Note: ``s are deliberately not made responsive by default.
  // For the rationale behind this, see the comments on the `.img-fluid` class.
}


// iOS "clickable elements" fix for role="button"
//
// Fixes "clickability" issue (and more generally, the firing of events such as focus as well)
// for traditionally non-focusable elements with role="button"
// see https://developer.mozilla.org/en-US/docs/Web/Events/click#Safari_Mobile

[role="button"] {
  cursor: pointer;
}


// Avoid 300ms click delay on touch devices that support the `touch-action` CSS property.
//
// In particular, unlike most other browsers, IE11+Edge on Windows 10 on touch devices and IE Mobile 10-11
// DON'T remove the click delay when `` is present.
// However, they DO support removing the click delay via `touch-action: manipulation`.
// See:
// * https://v4-alpha.getbootstrap.com/content/reboot/#click-delay-optimization-for-touch
// * http://caniuse.com/#feat=css-touch-action
// * https://patrickhlauke.github.io/touch/tests/results/#suppressing-300ms-delay

a,
area,
button,
[role="button"],
input,
label,
select,
summary,
textarea {
  touch-action: manipulation;
}


//
// Tables
//

table {
  // No longer part of Normalize since v4
  border-collapse: collapse;
  // Reset for nesting within parents with `background-color`.
  background-color: $table-bg;
}

caption {
  padding-top: $table-cell-padding;
  padding-bottom: $table-cell-padding;
  color: $text-muted;
  text-align: left;
  caption-side: bottom;
}

th {
  // Centered by default, but left-align-ed to match the `td`s below.
  text-align: left;
}


//
// Forms
//

label {
  // Allow labels to use `margin` for spacing.
  display: inline-block;
  margin-bottom: .5rem;
}

// Work around a Firefox/IE bug where the transparent `button` background
// results in a loss of the default `button` focus styles.
//
// Credit: https://github.com/suitcss/base/
button:focus {
  outline: 1px dotted;
  outline: 5px auto -webkit-focus-ring-color;
}

input,
button,
select,
textarea {
  // Normalize includes `font: inherit;`, so `font-family`. `font-size`, etc are
  // properly inherited. However, `line-height` isn't inherited there.
  line-height: inherit;
}

input[type="radio"],
input[type="checkbox"] {
  // Apply a disabled cursor for radios and checkboxes.
  //
  // Note: Neither radios nor checkboxes can be readonly.
  &:disabled {
    cursor: $cursor-disabled;
  }
}


input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="month"] {
  // Remove the default appearance of temporal inputs to avoid a Mobile Safari
  // bug where setting a custom line-height prevents text from being vertically
  // centered within the input.
  // See https://bugs.webkit.org/show_bug.cgi?id=139848
  // and https://github.com/twbs/bootstrap/issues/11266
  -webkit-appearance: listbox;
}

textarea {
  // Textareas should really only resize vertically so they don't break their (horizontal) containers.
  resize: vertical;
}

fieldset {
  // Browsers set a default `min-width: min-content;` on fieldsets,
  // unlike e.g. ``s, which have `min-width: 0;` by default.
  // So we reset that to ensure fieldsets behave more like a standard block element.
  // See https://github.com/twbs/bootstrap/issues/12359
  // and https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements
  min-width: 0;
  // Reset the default outline behavior of fieldsets so they don't affect page layout.
  padding: 0;
  margin: 0;
  border: 0;
}

legend {
  // Reset the entire legend element to match the `fieldset`
  display: block;
  width: 100%;
  padding: 0;
  margin-bottom: .5rem;
  font-size: 1.5rem;
  line-height: inherit;
}

input[type="search"] {
  // This overrides the extra rounded corners on search inputs in iOS so that our
  // `.form-control` class can properly style them. Note that this cannot simply
  // be added to `.form-control` as it's not specific enough. For details, see
  // https://github.com/twbs/bootstrap/issues/11586.
  -webkit-appearance: none;
}

// todo: needed?
output {
  display: inline-block;
//  font-size: $font-size-base;
//  line-height: $line-height;
//  color: $input-color;
}

// Always hide an element with the `hidden` HTML attribute (from PureCSS).
[hidden] {
  display: none !important;
}