html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strong, sub, sup, var,
b, u, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header,
nav, output, ruby, section, summary,
time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

article, aside, details, figcaption, figure, 
footer, header, menu, nav, section, picture, source {
    display: block;
}

body {
    /* line-height: 1.5; */
    line-height: 0;
    box-sizing: border-box;
    /* box-sizng 꼭 체크할 것 */
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-size: inherit;
    line-height: 1.2;
}
p {
    font-size: 1rem;
    line-height: 1.6;
}

ol, ul {
    list-style: none;
}

blockquote, q {
    quotes: none;
}

blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}

table {
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
}

caption {
    text-align: left;
    font-weight: normal;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    vertical-align: bottom;
}

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

.clearfix::after {
    content: "";
    clear: both;
    display: table;
}

.sr_only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

#skip {
    position: relative;
    z-index: 99;
}

#skip > a {
    position: absolute;
    display: block;
    width: 100%;
    height: 35px;
    background: #333;
    color: #fff;
    line-height: 35px;
    text-align: center;
    left: 0;
    top: -35px;
}

#skip > a:focus, 
#skip > a:active {
    top: 0;
}

/* IOS response */

html {
    -webkit-text-size-adjust: none;
    -moz-text-size-adjust: none;
    -ms-text-size-adjust: none;
    -o-text-size-adjust: none;
    /* text크기를 자동으로 조절하지 말아라 */
}

input, button {
    appearance: auto;
    border-radius: 0;
}


/* //IOS response */


input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

button, input[type="button"], input[type="submit"] {
    cursor: pointer;
}

input:valid, textarea:valid, select:valid {
    border-color: green;
}

input:invalid, textarea:invalid, select:invalid {
    border-color: red;
}