@charset "utf-8";

/*********************
RESET
*********************/
*, *:before, *:after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/*********************
common
*********************/
body {
    font-size: 16px;
    background: #fff;
    color: #333;
}

.fs-0_6{
    font-size: .6em;
}
.fs-0_7{
    font-size: .7em;
}
.fs-0_8{
    font-size: .8em;
}
.fs-0_9{
    font-size: .9em;
}
.fs-1_0{
    font-size: 1em;
}
.fs-1_1{
    font-size: 1.1em;
}
.fs-1_2{
    font-size: 1.2em;
}
.fs-1_3{
    font-size: 1.3em;
}
.fs-1_4{
    font-size: 1.4em;
}
.fs-1_5{
    font-size: 1.5em;
}
.fs-1_6{
    font-size: 1.6em;
}
.fs-1_7{
    font-size: 1.7em;
}
.fs-1_8{
    font-size: 1.8em;
}
.fs-1_9{
    font-size: 1.9em;
}
.fs-2_0{
    font-size: 2.0em;
}

.text-bold{
    font-weight: bold;
}

.text-center{
    text-align: center;
}

.text-red{
    color: #f00;
}

.mt-1em{
    margin-top: 1em;
}
.mt-2em{
    margin-top: 2em;
}
.mt-3em{
    margin-top: 3em;
}
.mt-4em{
    margin-top: 4em;
}

.mb-1em{
    margin-bottom: 1em;
}
.mb-2em{
    margin-bottom: 2em;
}
.mb-3em{
    margin-bottom: 3em;
}
.mb-4em{
    margin-bottom: 4em;
}

/*********************
header
*********************/
header {
    background: #fff;
    color: #333;
    padding: 1em 0;
    text-align: center;
    border-bottom: 1px solid #aaa;
}

/*********************
footer
*********************/
footer {
    background-color: #0161a1;
    color: #fff;
    font-size: .8em;
    text-align: center;
    padding: 1em 0;
    margin-top: 4em;
}

/*********************
main
*********************/
main {
    margin: 2em auto;
    max-width: 720px;
    padding-left: 20px;
    padding-right: 20px;
}

/*********************
button
*********************/
.btn-back a{
    display: block;
    width: 300px;
    margin: auto;
    background: #38b11c;
    color: #fff;
    font-weight: bold;
    text-align: center;    
    text-decoration: none;
    padding: 1em;
    cursor: pointer;
    border-radius: 4px;
    transition: .3s;
}
.btn-back a:hover {
    background: #216910;
}