body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  line-height: 1.4;
  background: #fefefe;
  color: #333;
  margin: 0;
}

header, footer {
  background-color: #0B317C;
  color: #fff;
  margin: 0;
  padding: .5rem 1rem;
}

.flex-container {
  display: flex;
  align-items: center; /* Center items vertically */
}

.flex-container h1 {
  margin: 10px 20px 0 20px;
}

.flex-container img {
  margin: 0;
  max-width: 100%; /* Ensure the image doesn't exceed the container width */
}

header > *, main > *:not(#Elements) {
  /* max-width: 48rem; */
  margin-left: auto;
  margin-right: auto;
}

footer a:link, footer a:visited {
  color: #fff;
}

footer a:focus, footer a:hover {
  color: #ccf;
}

main {
  margin: 2rem .5rem;
}

#Elements ol {
  padding: 0;
  color: #000;
  margin: 2rem 0;
/*   font-size: 30%; */
}

#Elements li {
  list-style-type: none;
  outline: .1em solid #000;
  box-sizing: border-box;
  padding: .5em .75em;
  width: 8em;
  position: relative;
  overflow: hidden;
  transition: transform .05s ease-in-out, box-shadow .2s ease-in-out, background-color .2s ease-in-out;
}

#Elements li div:first-child {
  text-align: right;
}

#Elements li div:nth-child(2) {
  font-size: 250%;
  font-weight: bold;
  line-height: 1.1;
}

#Elements li button {
  position: absolute;
  top: 0;
  left: 0;
  box-sizing: border-box;
  font: inherit;
  line-height: 1;
  padding: 0;
  text-indent: 5em;
  border: none;
  color: #fff;
  border-right: .1em solid #000;
  border-bottom: .1em solid #000;
  border-radius: 0 0 67% 0;
  width: 2em;
  height: 2em;
  overflow: hidden;
  background-color: #000;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M71.77069 61.87311a36.53064 36.53064 0 1 0-9.89917 9.89868l21.1792 21.17792a6.9996 6.9996 0 1 0 9.89844-9.89942zM41.49994 64a22.5 22.5 0 1 1 22.5-22.5 22.52554 22.52554 0 0 1-22.5 22.5z' fill='%23fff'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 1em 1em;
  background-position: 30% 40%;
}

#Elements li button:focus, #Elements li button:hover {
  background-color: #fff;
  color: #000;
  outline: none;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M71.77069 61.87311a36.53064 36.53064 0 1 0-9.89917 9.89868l21.1792 21.17792a6.9996 6.9996 0 1 0 9.89844-9.89942zM41.49994 64a22.5 22.5 0 1 1 22.5-22.5 22.52554 22.52554 0 0 1-22.5 22.5z' fill='%23000'/%3E%3C/svg%3E");
}

#Elements li#Key button {
  position: relative;
  border-radius: 0;
  border: none;
  height: 1.5em;
  width: 1.5em;
  background-color: transparent;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M71.77069 61.87311a36.53064 36.53064 0 1 0-9.89917 9.89868l21.1792 21.17792a6.9996 6.9996 0 1 0 9.89844-9.89942zM41.49994 64a22.5 22.5 0 1 1 22.5-22.5 22.52554 22.52554 0 0 1-22.5 22.5z' fill='%23000'/%3E%3C/svg%3E");
  background-position: 100% 100%;
}

#Elements li#Key button:focus, #Elements li#Key button:hover {
  background-color: #000;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M71.77069 61.87311a36.53064 36.53064 0 1 0-9.89917 9.89868l21.1792 21.17792a6.9996 6.9996 0 1 0 9.89844-9.89942zM41.49994 64a22.5 22.5 0 1 1 22.5-22.5 22.52554 22.52554 0 0 1-22.5 22.5z' fill='%23fff'/%3E%3C/svg%3E");
}

/* Colors */

.cat-fallback {
  background-color: #eeeeee;
}
.cat-doubtful {
  background-color: #888888;
}
.cat-stateofart {
  background-color: #B3E5FC;
}
.cat-jcblab {
  background-color: #8bcdff;
}
.cat-florida {
  background-color: #0b317c;
  color: #ffffff;
}
.cat-texas {
  background-color: #0b317c;
  color: #ffffff;
}
.cat-iberia {
  background-color: #0b317c;
  color: #ffffff;
}


.cat-diatomic_nonmetal {
  background-color: #FDC7FE;
}
.cat-noble_gas {
  background-color: #CBECFB;
}
.cat-alkali_metal {
  background-color: #FCD0AC;
}
.cat-alkaline_earth_metal {
  background-color: #FFE5AA;
}
.cat-metalloid {
  background-color: #AFFFB5;
}
.cat-polyatomic_nonmetal {
  background-color: #D0C1FF;
}
.cat-post-transition_metal {
  background-color: #FFFAA9;
}
.cat-transition_metal {
  background-color: #F0FEAB;
}
.cat-lanthanide {
  background-color: #DDFDAA;
}
.cat-actinide {
  background-color: #CAFEA9;
}
.cat-unknown_probably_transition_metal,
.cat-unknown_probably_post-transition_metal,
.cat-unknown_probably_metalloid,
.cat-unknown_predicted_to_be_noble_gas,
.cat-unknown_but_predicted_to_be_an_alkali_metal {
  background-color: #ddd;
}

#Key h2 {
  margin: 0 0 1em 0;
  font-size: 1.1em;
}

#Key dl {
  line-height: 1.4;
  margin: 0;
  padding: 0;
  width: 100%;
  /* text-transform: capitalize; */
}

#Key dt, #Key dd {
  margin: 0;
  padding: 0;
  margin-top: .5em;
  float: left;
}

#Key dt {
  width: 1.5em;
  height: 1.5em;
  outline: .1em solid #000;
  clear: left;
  margin-right: 1em;
}

#Key dt[class*=unknown], #Key dt[class*=unknown] + dd {
  display: none;
}

/* Fallback for non-grid browsers */

#Elements li {
  float: left;
}

#Elements ol::after {
  content: "";
  display: block;
  clear: left;
}

li#Key {
  clear: left;
  outline: none;
  padding-top: 1em;
  width: 100%;
}

@supports (display: grid) {
  #Elements li {
    float: none;
  }
  #Elements ol::after {
    content: none;
  }
  #Elements ol {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(8em, 8em));
  }
  li#Key {
    grid-column: 1 / span 3;
  }
  #Key dl {
    display: grid;
    grid-template-columns: repeat(1, 1em 12em);
    grid-gap: .5em 1em;
  }
  #Key dt, #Key dd {
    margin: 0;
    float: none;
    clear: none;
  }
}

@media all and (min-width: 40em) {
  #Elements ol {
    font-size: 1.18vw;
    display: -ms-grid;
    -ms-grid-columns: 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em;
    display: grid;
    grid-template-columns: 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em;
  }
  #Elements li:not(#Key):hover {
    transform: scale(2);
    z-index: 120;
    box-shadow: 0 0 1em rgba(0,0,0,.8);
  }
  /* Merge with above when :focus-within is supported */
  #Elements li:not(#Key):focus-within {
    transform: scale(2);
    z-index: 120;
    box-shadow: 0 0 1em rgba(0,0,0,.8);
  }
  li#Key {
    font-size: 150%;
    -ms-grid-column: 1;
    -ms-grid-column-span: 3;
    -ms-grid-row: 8;
    -ms-grid-row-span: 5;
    grid-column: 1 / 4;
    grid-row: 8 / 13;
  }
  li.row1 {
    grid-column: 1 / 2;
    -ms-grid-column: 1;
  }
  li.row2 {
    grid-column: 2 / 3;
    -ms-grid-column: 2;
  }
  li.row3 {
    grid-column: 3 / 4;
    -ms-grid-column: 3;
  }
  li.row4 {
    grid-column: 4 / 5;
    -ms-grid-column: 4;
  }
  li.row5 {
    grid-column: 5 / 6;
    -ms-grid-column: 5;
  }
  li.row6 {
    grid-column: 6 / 7;
    -ms-grid-column: 6;
  }
  li.row7 {
    grid-column: 7 / 8;
    -ms-grid-column: 7;
  }
  li.row8 {
    grid-column: 8 / 9;
    -ms-grid-column: 8;
  }
  li.row9 {
    grid-column: 9 / 10;
    -ms-grid-column: 9;
  }
  li.row10 {
    grid-column: 10 / 11;
    -ms-grid-column: 10;
  }
  li.col1 {
    grid-row: 18 / 19;
    -ms-grid-row: 18;
  }
  li.col2 {
    grid-row: 17 / 18;
    -ms-grid-row: 17;
  }
  li.col3 {
    grid-row: 16 / 17;
    -ms-grid-row: 16;
  }
  li.col4 {
    grid-row: 15 / 16;
    -ms-grid-row: 15;
  }
  li.col5 {
    grid-row: 14 / 15;
    -ms-grid-row: 14;
  }
  li.col6 {
    grid-row: 13 / 14;
    -ms-grid-row: 13;
  }
  li.col7 {
    grid-row: 12 / 13;
    -ms-grid-row: 12;
  }
  li.col8 {
    grid-row: 11 / 12;
    -ms-grid-row: 11;
  }
  li.col9 {
    grid-row: 10 / 11;
    -ms-grid-row: 10;
  }
  li.col10 {
    grid-row: 9 / 10;
    -ms-grid-row: 9;
  }
  li.col11 {
    grid-row: 8 / 9;
    -ms-grid-row: 8;
  }
  li.col12 {
    grid-row: 7 / 8;
    -ms-grid-row: 7;
  }
  li.col13 {
    grid-row: 6 / 7;
    -ms-grid-row: 6;
  }
  li.col14 {
    grid-row: 5 / 6;
    -ms-grid-row: 5;
  }
  li.col15 {
    grid-row: 4 / 5;
    -ms-grid-row: 4;
  }
  li.col16 {
    grid-row: 3 / 4;
    -ms-grid-row: 3;
  }
  li.col17 {
    grid-row: 2 / 3;
    -ms-grid-row: 2;
  }
  li.col18 {
    grid-row: 1 / 2;
    -ms-grid-row: 1;
  }
}
@media all and (min-width: 40em) and (max-width: 60em) {
  #Elements li.row1:hover {
    transform-origin: left;
  }
  #Elements li.row10:hover {
    transform-origin: right;
  }
  /* Merge with above when :focus-within is supported */
  #Elements li.row1:focus-within {
    transform-origin: left;
  }
  #Elements li.row10:focus-within {
    transform-origin: right;
  }
}

@media all and (min-width: 60em) {
  #Elements ol {
    font-size: .67vw;
    display: -ms-grid;
    -ms-grid-columns: 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em;
    display: grid;
    grid-template-columns: 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em 8em;
    margin: auto;
    width: fit-content;
  }
  li#Key {
    -ms-grid-row: 1;
    -ms-grid-row-span: 3;
    -ms-grid-column: 5;
    -ms-grid-column-span: 6;
    grid-row: 1 / 4 ;
    grid-column: 5 / 11;
  }
  #Key dl {
    display: -ms-grid;
    -ms-grid-columns: (2em 12em)[4];
    -ms-grid-rows: (2em)[5];
    grid-template-columns: repeat(2, 1em 12em);
  }
  #Key dt:nth-of-type(2n-1) {
    -ms-grid-column: 1;
  }
  #Key dt:nth-of-type(2n) {
    -ms-grid-column: 3;
  }
  #Key dd:nth-of-type(2n-1) {
    -ms-grid-column: 2;
  }
  #Key dd:nth-of-type(2n) {
    -ms-grid-column: 4;
  }
  #Key dl *:nth-child(n+5) {
    -ms-grid-row: 2;
  }
  #Key dl *:nth-child(n+9) {
    -ms-grid-row: 3;
  }
  #Key dl *:nth-child(n+13) {
    -ms-grid-row: 4;
  }
  #Key dl *:nth-child(n+17) {
    -ms-grid-row: 5;
  }
  li.row1 {
    grid-row: 1 / 2;
    -ms-grid-row: 1;
  }
  li.row2 {
    grid-row: 2 / 3;
    -ms-grid-row: 2;
  }
  li.row3 {
    grid-row: 3 / 4;
    -ms-grid-row: 3;
  }
  li.row4 {
    grid-row: 4 / 5;
    -ms-grid-row: 4;
  }
  li.row5 {
    grid-row: 5 / 6;
    -ms-grid-row: 5;
  }
  li.row6 {
    grid-row: 6 / 7;
    -ms-grid-row: 6;
  }
  li.row7 {
    grid-row: 7 / 8;
    -ms-grid-row: 7;
  }
  li.row8 {
    grid-row: 8 / 9;
    -ms-grid-row: 8;
  }
  li.row9 {
    grid-row: 9 / 10;
    -ms-grid-row: 9;
  }
  li.row10 {
    grid-row: 10 / 11;
    -ms-grid-row: 10;
  }
  li.col1 {
    grid-column: 1 / 2;
    -ms-grid-column: 1;
  }
  li.col2 {
    grid-column: 2 / 3;
    -ms-grid-column: 2;
  }
  li.col3 {
    grid-column: 3 / 4;
    -ms-grid-column: 3;
  }
  li.col4 {
    grid-column: 4 / 5;
    -ms-grid-column: 4;
  }
  li.col5 {
    grid-column: 5 / 6;
    -ms-grid-column: 5;
  }
  li.col6 {
    grid-column: 6 / 7;
    -ms-grid-column: 6;
  }
  li.col7 {
    grid-column: 7 / 8;
    -ms-grid-column: 7;
  }
  li.col8 {
    grid-column: 8 / 9;
    -ms-grid-column: 8;
  }
  li.col9 {
    grid-column: 9 / 10;
    -ms-grid-column: 9;
  }
  li.col10 {
    grid-column: 10 / 11;
    -ms-grid-column: 10;
  }
  li.col11 {
    grid-column: 11 / 12;
    -ms-grid-column: 11;
  }
  li.col12 {
    grid-column: 12 / 13;
    -ms-grid-column: 12;
  }
  li.col13 {
    grid-column: 13 / 14;
    -ms-grid-column: 13;
  }
  li.col14 {
    grid-column: 14 / 15;
    -ms-grid-column: 14;
  }
  li.col15 {
    grid-column: 15 / 16;
    -ms-grid-column: 15;
  }
  li.col16 {
    grid-column: 16 / 17;
    -ms-grid-column: 16;
  }
  li.col17 {
    grid-column: 17 / 18;
    -ms-grid-column: 17;
  }
  li.col18 {
    grid-column: 18 / 19;
    -ms-grid-column: 18;
  }
  #Elements li.col1:hover {
    transform-origin: left;
  }
  #Elements li.col18:hover {
    transform-origin: right;
  }
  /* Merge with above when :focus-within is supported */
  #Elements li.col1:focus-within {
    transform-origin: left;
  }
  #Elements li.col18:focus-within {
    transform-origin: right;
  }

  body {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
  }
}

@media all and (min-width: 2000px) {
  #Elements ol {
    font-size: .5vw;
    margin: auto;
    width: fit-content;
  }
}

/* Dialog */

#Overlay {
  position: absolute;
  z-index: 150;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(0,0,0,.75);
  display: none;
  backdrop-filter: blur(.1em); /* Maybe no */
}

[role="dialog"] {
  position: absolute;
  z-index: 200;
  top: 5vh;
  bottom: 5vh;
  left: 5vw;
  right: 5vw;
  overflow: hidden;
  box-shadow: 0 0 2em rgba(0,0,0,.5);
  border: .1em solid #000;
  background: #fefefe;
  padding: 0;
  visibility: visible;
  transition: transform .1s ease-in, opacity .2s ease-in;
}

[role="dialog"][hidden] {
  display: block;
  visibility: hidden;
  transform: scale(.5);
  opacity: .6;
}

[role="dialog"] h2 {
  margin: 0;
  padding: .5rem 1.25rem;
  /* Header bar for: Modal Dialog / Element Details */
  background: #0B317C;
  color: #fefefe;
}

[role="dialog"] button {
  float: right;
  margin: -2rem 1.25rem 0 0;
  padding: 0;
  text-indent: 5em;
  line-height: 0;
  font: inherit;
  background: transparent;
  border: none;
  border-radius: 50%;
  width: 1.5em;
  height: 1.5em;
  overflow: hidden;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M50 0a50 50 0 1 0 0 100A50 50 0 0 0 50 0zm26.6 76.6a37.5 37.5 0 0 1-53.2 0 37.5 37.5 0 0 1 0-53.2 37.5 37.5 0 0 1 53.2 0 37.5 37.5 0 0 1 0 53.2zm-7.3-45.9a6.6 6.6 0 0 0-9.3 0l-10 10-10-10a6.6 6.6 0 0 0-9.3 9.3l10 10-10 10a6.6 6.6 0 1 0 9.3 9.3l10-10 10 10a6.6 6.6 0 0 0 9.3 0 6.6 6.6 0 0 0 0-9.3l-10-10 10-10a6.6 6.6 0 0 0 0-9.3z' fill='%23fff'/%3E%3C/svg%3E");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: 50%;
}

[role="dialog"] button:focus, [role="dialog"] button:hover {
  outline: .2em solid transparent;
  background: #fff;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M50 0a50 50 0 1 0 0 100A50 50 0 0 0 50 0zm26.6 76.6a37.5 37.5 0 0 1-53.2 0 37.5 37.5 0 0 1 0-53.2 37.5 37.5 0 0 1 53.2 0 37.5 37.5 0 0 1 0 53.2zm-7.3-45.9a6.6 6.6 0 0 0-9.3 0l-10 10-10-10a6.6 6.6 0 0 0-9.3 9.3l10 10-10 10a6.6 6.6 0 1 0 9.3 9.3l10-10 10 10a6.6 6.6 0 0 0 9.3 0 6.6 6.6 0 0 0 0-9.3l-10-10 10-10a6.6 6.6 0 0 0 0-9.3z' fill='%23000'/%3E%3C/svg%3E");
  box-shadow: 0 0 .5em rgba(255,255,255,1);
}

[role="dialog"] div[role=document] {
  /*  Need this because of a VoiceOver bug  */
  display: inline;
}

[role="dialog"] div[role=document] div {
  box-sizing: border-box;
  height: calc(100% - 3rem);
  overflow: auto;
  padding: .5rem 1.25rem;
}

@media all and (min-width: 30em) {
  [role="dialog"] dl {
    margin: 1em 2rem;
    column-count: 2;
    column-gap: 4rem;
  }
}