classroom/src/assets/normalize.css

/*! normalize.css v7.0.0 | MIT License | github.com/necolas/normalize.css */

/* Document
   ========================================================================== */

/* add reset css */
*,
*:before,
*:after {
   box-sizing: border-box;
}

body {
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;
   text-rendering: optimizeLegibility;
   font-family: PingFang SC, Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
}

a:focus,
a:active {
   outline: none;
}

a,
a:focus,
a:hover {
   cursor: pointer;
   text-decoration: none;
}

ul {
   list-style: none;
   padding: 0;
   margin: 0;
}
p {
   padding: 0;
   margin: 0;
}

img {
   user-select: none;
   -webkit-user-select: none;
   -moz-user-select: none;
   -ms-user-select: none;
   -webkit-touch-callout: none;
   -webkit-user-drag: none;
   -moz-user-drag: none;
   -ms-user-drag: none;
   user-drag: none;
}

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in
 *    IE on Windows Phone and in iOS.
 */

html {
   line-height: 1; /* 1 */
   -ms-text-size-adjust: 100%; /* 2 */
   -webkit-text-size-adjust: 100%; /* 2 */
}

/* Sections
   ========================================================================== */

/**
 * Remove the margin in all browsers (opinionated).
 */

body {
   margin: 0;
}

/**
 * Add the correct display in IE 9-.
 */

article,
aside,
footer,
header,
nav,
section {
   display: block;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */

h1 {
   font-size: 2em;
   margin: 0.67em 0;
}

/* Grouping content
   ========================================================================== */

/**
 * Add the correct display in IE 9-.
 * 1. Add the correct display in IE.
 */

figcaption,
figure,
main {
   /* 1 */
   display: block;
}

/**
 * Add the correct margin in IE 8.
 */

figure {
   margin: 1em 40px;
}

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */

hr {
   box-sizing: content-box; /* 1 */
   height: 0; /* 1 */
   overflow: visible; /* 2 */
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

pre {
   font-family: monospace, monospace; /* 1 */
   font-size: 1em; /* 2 */
}

/* Text-level semantics
   ========================================================================== */

/**
 * 1. Remove the gray background on active links in IE 10.
 * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
 */

a {
   background-color: transparent; /* 1 */
   -webkit-text-decoration-skip: objects; /* 2 */
}

/**
 * 1. Remove the bottom border in Chrome 57- and Firefox 39-.
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
   border-bottom: none; /* 1 */
   text-decoration: underline; /* 2 */
   text-decoration: underline dotted; /* 2 */
}

/**
 * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
 */

b,
strong {
   font-weight: inherit;
}

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

b,
strong {
   font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

code,
kbd,
samp {
   font-family: monospace, monospace; /* 1 */
   font-size: 1em; /* 2 */
}

/**
 * Add the correct font style in Android 4.3-.
 */

dfn {
   font-style: italic;
}

/**
 * Add the correct background and color in IE 9-.
 */

mark {
   background-color: #ff0;
   color: #000;
}

/**
 * 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;
}

/* Embedded content
   ========================================================================== */

/**
 * Add the correct display in IE 9-.
 */

audio,
video {
   display: inline-block;
}

/**
 * Add the correct display in iOS 4-7.
 */

audio:not([controls]) {
   display: none;
   height: 0;
}

/**
 * Remove the border on images inside links in IE 10-.
 */

img {
   border-style: none;
}

/**
 * Hide the overflow in IE.
 */

svg:not(:root) {
   overflow: hidden;
}

/* Forms
   ========================================================================== */

/**
 * 1. Change the font styles in all browsers (opinionated).
 * 2. Remove the margin in Firefox and Safari.
 */

button,
input,
optgroup,
select,
textarea {
   font-family: sans-serif; /* 1 */
   font-size: 100%; /* 1 */
   line-height: 1.15; /* 1 */
   margin: 0; /* 2 */
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */

button,
input {
   /* 1 */
   overflow: visible;
}

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

button,
select {
   /* 1 */
   text-transform: none;
}

/**
 * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
 *    controls in Android 4.
 * 2. Correct the inability to style clickable types in iOS and Safari.
 */

button,
html [type="button"], /* 1 */
[type="reset"],
[type="submit"] {
   -webkit-appearance: button; /* 2 */
}

/**
 * Remove the inner border and padding in Firefox.
 */

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
   border-style: none;
   padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
   outline: 1px dotted ButtonText;
}

/**
 * Correct the padding in Firefox.
 */

fieldset {
   padding: 0.35em 0.75em 0.625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */

legend {
   box-sizing: border-box; /* 1 */
   color: inherit; /* 2 */
   display: table; /* 1 */
   max-width: 100%; /* 1 */
   padding: 0; /* 3 */
   white-space: normal; /* 1 */
}

/**
 * 1. Add the correct display in IE 9-.
 * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */

progress {
   display: inline-block; /* 1 */
   vertical-align: baseline; /* 2 */
}

/**
 * Remove the default vertical scrollbar in IE.
 */

textarea {
   overflow: auto;
}

/**
 * 1. Add the correct box sizing in IE 10-.
 * 2. Remove the padding in IE 10-.
 */

[type="checkbox"],
[type="radio"] {
   box-sizing: border-box; /* 1 */
   padding: 0; /* 2 */
}

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

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-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 and cancel buttons in Chrome and Safari on macOS.
 */

[type="search"]::-webkit-search-cancel-button,
[type="search"]::-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 */
}

/* Interactive
   ========================================================================== */

/*
 * Add the correct display in IE 9-.
 * 1. Add the correct display in Edge, IE, and Firefox.
 */

details, /* 1 */
menu {
   display: block;
}

/*
 * Add the correct display in all browsers.
 */

summary {
   display: list-item;
}

/* Scripting
   ========================================================================== */

/**
 * Add the correct display in IE 9-.
 */

canvas {
   display: inline-block;
}

/**
 * Add the correct display in IE.
 */

template {
   display: none;
}

/* Hidden
   ========================================================================== */

/**
 * Add the correct display in IE 10-.
 */

[hidden] {
   display: none;
}