Banner 01

/* ベース */
figure { margin: 0 }
img {
    max-width: 100%;
    vertical-align: bottom;
}
button {
    margin: 0;
    width: auto;
    height: auto;
    font-family: inherit;
    cursor: pointer;
}
a *,
button * { cursor: inherit }
.wrapper {
    position: relative;
    height: 100%;
    text-align: left;
    font-size: 12px;
    line-height: 1.66667;
}
.wrapper * {
    box-sizing: border-box;
    white-space: inherit;
    font-size: 100%;
    line-height: inherit;
}

/* ボタン */
.btn {
    transition: .2s;
    display: inline-block;
    border-radius: 4px;
    border: solid 1px transparent;
    padding: 13px 16px;
    background: #{style.colorMain};
    color: #fff;
    vertical-align: middle;
    text-decoration: none;
    text-align: center;
    line-height: 1.25;
}
.btn:hover,
.btn:focus { opacity: .75 }

/* 閉じるボタン */
.btn-close {
    position: absolute;
    z-index: 1;
    border-radius: 50%;
    line-height: 1;
    transition: .25s;
    top: 7px;
    right: 7px;
    padding: 6px;
    background: 0;
    color: #{style.closeColor};
}
.btn-close:hover,
.btn-close:focus {
    opacity: .5;
    -webkit-transform: rotate(90deg);
            transform: rotate(90deg);
}
.btn-close .icon {
    display: inline-block;
    vertical-align: top;
}

/* バナー */
a.banner { transition: .2s }
a.banner:hover,
a.banner:focus {
    box-shadow: 0 5px 16px rgba(0,0,0,.1), 0 8px 28px rgba(0,0,0,.16);
}
.banner {
    box-shadow: 0 5px 16px rgba(0,0,0,.05), 0 8px 14px rgba(0,0,0,.08);
    display: block;
}
.banner img {
    margin: 0 auto;
    width: 320px;
    max-width: 90vw;
    max-height: calc(~"100vh - 160px");
}