html, body {
margin: 0 1em;
}

h1 {
margin: 0;
}
table {
text-align:center;
border:0px;
font-family:sans-serif
}
th {
}
td {
width:1.75em;
height:1.75em
}
.block {
height:2em;
font-size:0.75em;
text-align:left;
vertical-align:bottom
}
.mouse {
border: 1px solid black;
border-collapse: collapse
}
th.mouse, td.mouse {
width:25%
}
#hydrogen {
border:1px solid lightgray;
background-color:#ffffff
}
#helium {
background-color:#d9ffff
}
#lithium {
background-color:#cc80ff
}
#beryllium {
background-color:#c2ff00
}
#boron {
background-color:#ffb5b5
}
#carbon {
background-color:#909090
}
#nitrogen {
background-color:#3050f8
}
#oxygen {
background-color:#ff0d0d
}
#fluorine {
background-color:#90e050
}
#neon {
background-color:#b3e3f5
}
#sodium {
background-color:#ab5cf2
}
#magnesium {
background-color:#8aff00
}
#aluminium {
background-color:#bfa6a6
}
#silicon {
background-color:#f0c8a0
}
#phosphorus {
background-color:#ff8000
}
#sulphur {
background-color:#ffff30
}
#chlorine {
background-color:#1ff01f
}
#argon {
background-color:#80d1e3
}
#potassium {
background-color:#8f40d4
}
#calcium {
background-color:#3dff00
}
#scandium {
background-color:#e6e6e6
}
#titanium {
background-color:#bfc2c7
}
#vanadium {
background-color:#a6a6ab
}
#chromium {
background-color:#8a99c7
}
#manganese {
background-color:#9c7ac7
}
#iron {
background-color:#e06633
}
#cobalt {
background-color:#f090a0
}
#nickel {
background-color:#50d050
}
#copper {
background-color:#c88033
}
#zinc {
background-color:#7d80b0
}
#gallium {
background-color:#c28f8f
}
#germanium {
background-color:#668f8f
}
#arsenic {
background-color:#bd80e3
}
#selenium {
background-color:#ffa100
}
#bromine {
background-color:#a62929
}
#krypton {
background-color:#5cb8d1
}
#rubidium {
background-color:#702eb0
}
#strontium {
background-color:#00ff00
}
#yttrium {
background-color:#94ffff
}
#zirconium {
background-color:#94e0e0
}
#niobium {
background-color:#73c2c9
}
#molybdenum {
background-color:#54b5b5
}
#technetium {
background-color:#3b9e9e
}
#ruthenium {
background-color:#248f8f
}
#rhodium {
background-color:#0a7d8c
}
#palladium {
background-color:#006985
}
#silver {
background-color:#c0c0c0
}
#cadmium {
background-color:#ffd98f
}
#indium {
background-color:#a67573
}
#tin {
background-color:#668080
}
#antimony {
background-color:#9e63b5
}
#tellurium {
background-color:#d47a00
}
#iodine {
background-color:#940094
}
#xenon {
background-color:#429eb0
}
#caesium {
background-color:#57178f
}
#barium {
background-color:#00c900
}
#lutetium {
background-color:#00ab24
}
#hafnium {
background-color:#4dc2ff
}
#tantalum {
background-color:#4da6ff
}
#tungsten {
background-color:#2194d6
}
#rhenium {
background-color:#267dab
}
#osmium {
background-color:#266696
}
#iridium {
background-color:#175487
}
#platinum {
background-color:#d0d0e0
}
#gold {
background-color:#ffd123
}
#mercury {
background-color:#b8b8d0
}
#thallium {
background-color:#a6544d
}
#lead {
background-color:#575961
}
#bismuth {
background-color:#9e4fb5
}
#polonium {
background-color:#ab5c00
}
#astatine {
background-color:#754f45
}
#radon {
background-color:#428296
}
#francium {
background-color:#420066
}
#radium {
background-color:#007d00
}
#lawrencium {
background-color:#c70066
}
#rutherfordium {
background-color:#cc0059
}
#dubnium {
background-color:#d1004f
}
#seaborgium {
background-color:#d90045
}
#bohrium {
background-color:#e00038
}
#hassium {
background-color:#e6002e
}
#meitnerium {
background-color:#eb0026
}
#darmstadtium {
background-color:#eb0026
}
#roentgenium {
background-color:#eb0026
}
#copernicium {
background-color:#eb0026
}
#lanthanum {
background-color:#70d4ff
}
#cerium {
background-color:#ffffc7
}
#praseodymium {
background-color:#d9ffc7
}
#neodymium {
background-color:#c7ffc7
}
#promethium {
background-color:#a3ffc7
}
#samarium {
background-color:#8fffc7
}
#europium {
background-color:#61ffc7
}
#gadolinium {
background-color:#45ffc7
}
#terbium {
background-color:#30ffc7
}
#dysprosium {
background-color:#1fffc7
}
#holmium {
background-color:#00ff9c
}
#erbium {
background-color:#00ff9c
}
#thulium {
background-color:#00d452
}
#ytterbium {
background-color:#00bf38
}
#actinium {
background-color:#70abfa
}
#thorium {
background-color:#00baff
}
#protoactinium {
background-color:#00a1ff
}
#uranium {
background-color:#008fff
}
#neptunium {
background-color:#0080ff
}
#plutonium {
background-color:#006bff
}
#americium {
background-color:#545cf2
}
#curium {
background-color:#785ce3
}
#berkelium {
background-color:#8a4fe3
}
#californium {
background-color:#a136d4
}
#einsteinium {
background-color:#b31fd4
}
#fermium {
background-color:#b31fba
}
#mendelevium {
background-color:#b30da6
}
#nobelium {
background-color:#bd0d87
}