html, body {
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    position: relative;
    background-color: ghostwhite;

    font-family: 'SeoulNamsan';

    color: var(--black-color);

    --ribbon-height: 5rem;

    --black-color: rgb(55, 50, 70);
    --box-shadow-rgb: 160, 160, 180;

    --attr-color: darkturquoise;
    --attr-color-dark: darkcyan;
    --attr-hover-color: lightsalmon;
    --item-hover-color: mistyrose;

    --transition-attr:            color 200ms ease-out;
    --transition-item: background-color 200ms ease-out;
}

.no-select {
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

span.colorattr {
    color: var(--attr-color);
    fill: var(--attr-color);
    transition: var(--transition-attr);
    cursor: pointer;
}

span.colorattr:hover {
    color: var(--attr-hover-color);
}

div, button {
    font-family: 'SeoulNamsan';
    outline: none;
    border: none;
}

div {
    transition: var(--transition-item);
}

div.head {
    display: block;
}

div.body {
    min-height: calc(100% - var(--ribbon-height));
    display: flex;
}

div.va { /* vertical align */
    display: flex;
    align-items: center;
}

div.ha { /* horizontal align */
    text-align: center;
    justify-content: center;
}

div.ribbon-top {
    position: relative;
    width: 100%;
    height: var(--ribbon-height);
    background-color: darkslateblue;
}

div.ribbon-top svg {
    fill: white;
}

div.ribbon-top button {
    padding: 1.2rem 2.4rem;
    margin: 0 .2rem;
    border: none;
    background: none;
    transition: 400ms;
    cursor: pointer;
}

div.ribbon-top button:hover {
    filter: opacity(60%);
}

div.ribbon-top button.quizlet {
    filter: none;
}

div.ribbon-top button.labeled {
    position: absolute;
    padding: .7rem 1.2rem;
    right: 6.5rem;

    color: white;
    background-color: var(--attr-color);
    border-radius: .4rem;
    transition: 300ms;
}

div.ribbon-top button.labeled:hover {
    background-color: var(--attr-color-dark);
    filter: none;
}

div.ribbon-top div.profile {
    position: absolute;
    width: 2.2rem;
    right: 2.4rem;
    cursor: pointer;
}

div.ribbon-top span.pipe {
    color: var(--black-color);
    filter: opacity(20%);
    font-size: 1.6rem;
    font-weight: bold;
}

div.panel-left {
    font-weight: 300;

    min-width: 17rem;
    font-size: .95rem;
    background-color: white;
    box-shadow: 0 0 2rem rgba(var(--box-shadow-rgb), .3);
}

div.panel-left svg {
    fill: var(--black-color);
    height: 1.2rem;
}

div.panel-left span.svgwrap {
    padding-right: 1rem;
}

div.panel-left span.float {
    padding-left: 2.17rem;
}

div.panel-left div.panel-list {
    border-top: 1px solid rgba(var(--box-shadow-rgb), .3);
    padding: 1rem 0;
}

div.panel-left div.panel-item {
    padding: .6rem 2.4rem;
    cursor: pointer;
}

div.panel-left div.panel-attr {
    padding: .6rem 2.4rem;
    color: var(--attr-color);
    transition: var(--transition-attr);
    background-color: none;
    cursor: pointer;
}

div.panel-left div.panel-item:hover {
    background-color: var(--item-hover-color);
}

div.panel-left div.panel-attr:hover {
    color: var(--attr-hover-color);
}

div.panel-center {
    display: block;
    padding: 2.6rem;
    width: 55%;
    font-size: 1rem;
    /* border: 1px dashed var(--black-color); */
}

div.panel-center div.panel-item {
    display: block;
    font-weight: bold;
    margin-bottom: 2.2rem;
}

div.panel-center div.itemhead {
    display: flex;
}

div.panel-center div.itemname {
    width: 50%;
    text-align: left;
    /* border: 1px dashed goldenrod; */
}

div.panel-center div.itemmore {
    width: 50%;
    text-align: right;
    font-weight: 300;
    /* border: 1px dashed goldenrod; */
}

div.panel-center div.cardbox {
    display: flex;
    flex-flow: row wrap;

    /* border: 1px solid coral; */
    margin-top: 1rem;
}

div.panel-center div.cardset {
    position: relative;
    width: max(18rem, 44%); /* need max-width? */
    height: 9.4rem;
    margin: 0 .6rem .6rem 0;
    padding: 1.6rem 1rem;
    cursor: pointer;

    background-color: white;
    border-radius: .4rem;
    box-shadow: .1rem .3rem .3rem rgba(var(--box-shadow-rgb), .2);

    /* border: 1px dotted blueviolet; */
}

div.panel-center div.cardset-title {
    font-size: 1.1rem;
    font-weight: 400;
    line-height: 1.2rem;

    /* border: 1px dotted; */
}

div.panel-center div.n-terms {
    margin-top: .8rem;

    font-size: 1rem;
    font-weight: 300;
    color: rgba(var(--box-shadow-rgb), 1);

    /* border: 1px dotted; */
}

div.panel-center div.cardset-creator {
    position: absolute;
    bottom: 1.5rem;

    font-size: 1rem;
    font-weight: 400;

    /* border: 1px dotted hotpink; */
}

div.panel-center div.cardset-creator span.usericon {
    margin-right: .5rem;
    width: 1.5rem;
}

/* div.panel-center div.cardset-creator span.usericon svg {
    width: 1.4rem;
    fill: var(--black-color);
} */