body {
    font-size: 16px;/*body에 기준px값을 적는다.*/
    /*em: font size of the element, rem: font size of the root element, vw: 1% of viewport's width*/
    /*px: 1/96 of 1 in, pt: 1/72 of 1 in*/
}
section {
    position: relative;
    width: 100%;
    margin-bottom: 4rem;
}
table {
    width: 100%;
    margin: 2rem auto;
    padding: 0.5rem;
    border: 2px solid black;
    border-collapse: collapse;/*border space 값을 없앤다.*/
    border-spacing: 0;
}
caption {
    padding: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
}
.table-easy td, .table-easy th {
    border: 1px solid lightgray;
    text-align: center;
}
.table-hard td, .table-hard th {
    margin: 0;
    padding: 0.25rem;
    text-align: left;
    vertical-align: text-top;
    border: 1px solid lightgray;
}
.table-hard col {
    border: 1px solid black;
}
.table-hard th {
    background-color: black;
    color: white;
    font-weight: 400;
    border: 1px solid white;
}
form {
    margin: 4rem auto;
}
fieldset {
    margin-bottom: 2rem;
    padding: 1.6rem 1.4rem;
    border: 2px solid lightgray;
}
legend {
    font-size: 1rem;
    font-weight: 400;
    color: #666;
    padding: 0;
}
input, textarea {
    margin-bottom: 2rem;
    margin-right: 1.4rem;
    padding: 0.6rem;
}
select {
    padding: 0.2rem 0.3rem;
}
h1 {
    margin-left: 1.1rem;
    font-size: 1.4rem;
    line-height: 1.4rem;
}
h2 {
    font-size: 1rem;
    font-weight: 700;
    line-height: 0.6rem;
}
button {
    margin-left: 1.4rem;
    font-size: 1.1rem;
    font-weight: 700;
    padding: 0.6rem 1.6rem;
    border: 2px solid lightgray;
    border-radius: 0.2rem;
}
button:last-child {
    margin-left: 0;
    background-color: black;
    color: white;
    border: 2px solid black;
}
.designers-link {
    margin: 0;
    padding: 0.4rem;
}
.designers-link li {
    display: inline-block;
    margin-left: 0;
    padding: 0.6rem;
    list-style: none;
}
a {
    padding: 0.6rem 1rem;
    font-weight: 700;
    text-decoration: none;
    color: white;
    background-color: deeppink;
    border-radius: 5px;
}
a:active {
    background-color: rebeccapurple;
}
a:visited {
    background-color: gray;
}
a:focus, a:hover {
    background-color: darkviolet;
}
.wrap {
    margin: 1rem;
    padding: 1rem;
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    border: 1px solid darkorange;
}
.border {
    background-color: yellow;
}
.margin, .padding {
    background-color: lightgrey;
}
.content {
    background-color: white;
    border: 1px dashed darkorange;
}