* {
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue",
        "Hiragino Kaku Gothic ProN",
        "Hiragino Sans",
        Meiryo,
        Arial,
        sans-serif;
    font-size: 16px;
    line-height: 1.6;
    margin: 0;
    padding: 0 5px;
    background-color: #c7e5c8;
    color: #333;
}

a {
    color: #333;
}

button, .btn {
    background-color: #3a3a3a;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.link-button {
    color: #333;
    text-decoration: underline;
    cursor: pointer;
}

button:hover {
    background-color: #202020;
}

.btn-sm {
    padding: 5px 8px !important;
    font-size: 13px !important;
    line-height: 17px !important;
}


.mt-01 { margin-top: 1px; }
.mt-03 { margin-top: 3px; }
.mt-05 { margin-top: 5px; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mt-4 { margin-top: 40px; }
.mt-5 { margin-top: 50px; }
.mb-01 { margin-bottom: 1px; }
.mb-03 { margin-bottom: 3px; }
.mb-05 { margin-bottom: 5px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mb-4 { margin-bottom: 40px; }
.mb-5 { margin-bottom: 50px; }

.text-big {
    font-size: 1.2em;
    font-weight: bold;
}
.text-sm {
    font-size: 13px;
    line-height: 18px;
}
.text-sub {
    color: #888;
}

.block {
    display: block;
}
.i-block {
    display: inline-block;
}
.t-center {
    text-align: center;
}
.small-link {
    font-size: 12px;
}


.root-section {
    display: block;
    margin: 60px auto 20px auto;
    width: 100%;
    max-width: 720px;
}
.main-section {
    background-color: #fff;
    padding: 10px 20px 30px 20px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}





/* .header {
    line-height: 40px;
    margin: -20px;
    padding: 4px 20px;
    width: 100%;
    position: fixed;
    background-color: rgba(255, 255, 255, 0.8);
}
.header a {
    font-weight: bold;
    text-decoration: none;
}
.header-block {
    height: 50px;
}
.header-mini-image {
    width: 30px;
    height: 30px;
    vertical-align: middle;
} */



.footer {
    margin: 20px 0;
    padding: 10px;
    background-color: #fff;
    border-radius: 6px;
}
.copyright {
    margin-top: 20px;
    font-size: 12px;
    font-weight: bold;
}
.copyright a {
    text-decoration: none;
}


h1 {
    margin: 10px 0;
    padding: 0;
    font-size: 32px;
    line-height: 36px;
    font-weight: bold;
}

h2 {
    margin: 30px 0 20px 0;
    padding-left: 8px;
    font-size: 24px;
    line-height: 38px;
    font-weight: bold;
    border-left: solid 8px #333;
    border-bottom: solid 1px #333;
}

h3 {
    margin: 25px 0 10px 0;
    padding-left: 8px;
    font-size: 18px;
    line-height: 30px;
    font-weight: bold;
    border-left: solid 4px #333;
    border-bottom: solid 1px #333;
}



.btn {
    display: inline-block;
    font-size: 16px;
    line-height: 26px;
    text-decoration: none;
    font-weight: bold;
    background-color: #ffaa00;
    color: white;
    padding: 4px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.btn-lg {
    font-size: 20px;
    line-height: 30px;
    padding: 10px 20px;
}
.btn:hover {
    background-color: #ffbf40;
}
.btn:disabled {
    background-color: #ccc;
    color: #f8f8f8;
    cursor: inherit;
}



.main-top-image {
    width: 100%;
    max-width: 420px;
    height: auto;
}


#page-up-button {
    position: fixed;
    right: 20px;
    bottom: 20px;

    cursor: pointer;
    width: 60px;
    height: 60px;
}