style.css

@charset "utf-8";

html, body, div, span, h1, h2, h3, h4, h5, h6, p, a, em, img, strong,dl, dt, dd, ol, ul, li{
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 12px;
}
html, body{
    height: 100%;
    background-color: #f2f2f2;
}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
    content: '';
    content: none;
}
.blind{
    overflow: hidden;
    position: absolute;
    clip: rect( 0 0 0 0);
    width: 1px;
    height: 1px;
    margin: -1px;
}
.wrap{
    height: 100%;
    background-repeat: no-repeat;
    background-position: center right;
    background-size: cover;
    background-color: rgb(0, 174, 247);
    background-image: url('./img/background.jpg');
}
.wrap .header{
    position: relative;
    height: 15px;
    background-color: #f9f978;
    border-bottom: 1px solid #eee;
    cursor:move;
}

.memo{
    position: absolute;
    background-color: lightyellow;
    border: 1px solid #eee;
}
.content{
    position: relative;
    overflow-x:hidden;
    overflow-y:auto;
    padding: 10px;
}
.content .textarea{
    outline: none;
}
.btn_close{
    position: absolute;
    top: 0;
    right: 0;
    width: 15px;
    height: 15px;
    appearance: button;
    -webkit-appearance: button;
    -moz-appearance: button;
    border: 0;
    background-color: #fff;
    cursor: pointer;
    outline:0;
    text-align: center;
}
.btn_close:after{
    position: absolute;
    top: -1px;
    right: 0;
    width: 15px;
    content:"\d7";
    font-size: 15px;
    line-height: 15px;
    color: #666;
    text-align: center;
}
.btn_size{
    position: absolute;
    bottom: 0;
    right: 0;
    width: 15px;
    height: 15px;
    appearance: button;
    -webkit-appearance: button;
    -moz-appearance: button;
    border: 0;
    background: transparent;
    cursor: nwse-resize;
    outline:0;
    text-align: center;
}
.help {
    position: fixed;
    color: rgba(255, 255, 255, 0.4);
    font-size: 20px;
    right: 5%;
    bottom: 5%;
}