/*まずはお決まりのボックスサイズ算出をborer-boxに */
*,
*:before,
*:after {
    -webkit-box-sizing: inherit;
    box-sizing: inherit;
}

html {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 62.5%;/*rem算出をしやすくするために*/
}

.btn,
a.btn,
button.btn {
    font-size: 1.6rem;
    font-weight: 700;
    position: relative;
    display: inline-block;
    padding: 3rem 4rem;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    text-align: center;
    vertical-align: middle;
    text-decoration: none;
    letter-spacing: 0.1em;
    border-radius: 0.5rem;
    border-color: #e2ced0;
}

#book
{
    color: #eaa2aa;
    text-shadow: -1px -1px 1px rgba(255, 255, 255, .44), 1px 1px 1px #4a0a11;
    background-color: #eb6868;
}

#blog
{
    color: #7bfef3;
    text-shadow: -1px -1px 1px rgba(255, 255, 255, .44), 1px 1px 1px #4a0a11;
    background-color: #42bae6;
}

#shift
{
    color: #82fcab;
    text-shadow: -1px -1px 1px rgba(255, 255, 255, .44), 1px 1px 1px #4a0a11;
    background-color: #20d96d;
}

h1{
    text-align: center;
    
}