body { 
    margin: 0;
    background-color: #333333; 
    font-family: 'Arial', sans-serif;
}

.periodic-table { 
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    grid-gap: 1%;
    padding: 1%;
    box-sizing: border-box;
}

.legend .element {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 115%;
    padding-top: 100%; /* Aspect ratio 1:1 */
    color: #fff;
    border-radius: 5%;
    box-sizing: border-box;
    cursor: pointer;
}

.legend .element .span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2vw;
}

.element {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 115%;
    padding-top: 100%; /* Aspect ratio 1:1 */
    color: #eeeeee;
    border-radius: 15%;
    box-sizing: border-box;
    cursor: pointer;
    opacity: 0.90;
    border: 3px solid #ffffff;
}

.element span {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -35%);
    font-size: 1.4vw;
    font-weight:bold;
}

.atomic-number {
    position: absolute;
    top: 0;
    left: 0;
    /*font-size: 15px;*/ /* Adjust the font size as needed */
    font-size: .75vw;
    color: white; /* Adjust the color as needed */
    padding: 1px;
    margin-left: 5px;
}            

.element-name {
    position: absolute;
    bottom: 0;
    left: 50%;
    /*font-size: 12px;  Adjust the font size as needed */
    font-size: 0.7vw; /* Adjust the font size as needed */
    color: white; /* Adjust the color as needed */
    padding-top: 3px;
    padding: 1px;
    margin-left: 0px;
    transform: translate(-50%, -50%);
    align-items: center;
    justify-content: center;
}            

.hovered {
    background-color: #777777;
    color: #ffffff;
}            

/* .alkali-metal { background-color: #ff0000; }
.alkali-earth { background-color: #ff6600; }
.transition-metal { background-color: #b2b500; }
.basic-metal { background-color: #14a700; }
.semimetal { background-color: #00a7c1; }
.nonmetal { background-color: #003cff; }
.halogen { background-color: #c4bcf7; } 
.noble-gas { background-color: #de00bd; }
.lanthanide { background-color: #ff4ed0; }
.actinide { background-color: #c50073 } */

.alkali-metal { border-color: #ff0000; }
.alkali-earth { border-color: #ff6600; }
.transition-metal { border-color: #b2b500; }
.basic-metal { border-color: #14a700; }
.semimetal { border-color: #00a7c1; }
.nonmetal { border-color: #003cff; }
.halogen { border-color: #c4bcf7; } 
.noble-gas { border-color: #de00bd; }
.lanthanide { border-color: #00f140; }
.actinide { border-color: #ff8efd }

/* Adjust font size for smaller viewports */
@media (max-width: 768px) {
    .element span { font-size: 1vw; }
}

@media (max-width: 480px) {
    .element span { font-size: 4vw; }
}

/* Specific element positions */
#H { grid-column: 1; }
#He { grid-column: 18; }
#Li { grid-column: 1; grid-row: 2; }
#Be { grid-column: 2; grid-row: 2; }
#B { grid-column: 13; grid-row: 2; }
#C { grid-column: 14; grid-row: 2; }
#N { grid-column: 15; grid-row: 2; }
#O { grid-column: 16; grid-row: 2; }
#F { grid-column: 17; grid-row: 2; }
#Ne { grid-column: 18; grid-row: 2; }

#Na { grid-column: 1; grid-row: 3; }
#Mg { grid-column: 2; grid-row: 3; }
#Al { grid-column: 13; grid-row: 3; }
#Si { grid-column: 14; grid-row: 3; }
#P { grid-column: 15; grid-row: 3; }
#S { grid-column: 16; grid-row: 3; }
#Cl { grid-column: 17; grid-row: 3; }
#Ar { grid-column: 18; grid-row: 3; }

/* Grid positions for K to Xe */
#K { grid-column: 1; grid-row: 4; }
#Ca { grid-column: 2; grid-row: 4; }
#Sc { grid-column: 3; grid-row: 4; }
#Ti { grid-column: 4; grid-row: 4; }
#V { grid-column: 5; grid-row: 4; }
#Cr { grid-column: 6; grid-row: 4; }
#Mn { grid-column: 7; grid-row: 4; }
#Fe { grid-column: 8; grid-row: 4; }
#Co { grid-column: 9; grid-row: 4; }
#Ni { grid-column: 10; grid-row: 4; }
#Cu { grid-column: 11; grid-row: 4; }
#Zn { grid-column: 12; grid-row: 4; }
#Ga { grid-column: 13; grid-row: 4; }
#Ge { grid-column: 14; grid-row: 4; }
#As { grid-column: 15; grid-row: 4; }
#Se { grid-column: 16; grid-row: 4; }
#Br { grid-column: 17; grid-row: 4; }
#Kr { grid-column: 18; grid-row: 4; }
#Rb { grid-column: 1; grid-row: 5; }
#Sr { grid-column: 2; grid-row: 5; }
#Y { grid-column: 3; grid-row: 5; }
#Zr { grid-column: 4; grid-row: 5; }
#Nb { grid-column: 5; grid-row: 5; }
#Mo { grid-column: 6; grid-row: 5; }
#Tc { grid-column: 7; grid-row: 5; }
#Ru { grid-column: 8; grid-row: 5; }
#Rh { grid-column: 9; grid-row: 5; }
#Pd { grid-column: 10; grid-row: 5; }
#Ag { grid-column: 11; grid-row: 5; }
#Cd { grid-column: 12; grid-row: 5; }
#In { grid-column: 13; grid-row: 5; }
#Sn { grid-column: 14; grid-row: 5; }
#Sb { grid-column: 15; grid-row: 5; }
#Te { grid-column: 16; grid-row: 5; }
#I { grid-column: 17; grid-row: 5; }
#Xe { grid-column: 18; grid-row: 5; }

#Cs { grid-column: 1; grid-row: 6; }
#Ba { grid-column: 2; grid-row: 6; }
#La { grid-column: 3; grid-row: 6; }
#Hf { grid-column: 4; grid-row: 6; }
#Ta { grid-column: 5; grid-row: 6; }
#W { grid-column: 6; grid-row: 6; }
#Re { grid-column: 7; grid-row: 6; }
#Os { grid-column: 8; grid-row: 6; }
#Ir { grid-column: 9; grid-row: 6; }
#Pt { grid-column: 10; grid-row: 6; }
#Au { grid-column: 11; grid-row: 6; }
#Hg { grid-column: 12; grid-row: 6; }
#Tl { grid-column: 13; grid-row: 6; }
#Pb { grid-column: 14; grid-row: 6; }
#Bi { grid-column: 15; grid-row: 6; }
#Po { grid-column: 16; grid-row: 6; }
#At { grid-column: 17; grid-row: 6; }
#Rn { grid-column: 18; grid-row: 6; }

#Fr { grid-column: 1; grid-row: 7; }
#Ra { grid-column: 2; grid-row: 7; }
#Ac { grid-column: 3; grid-row: 7; }
#Rf { grid-column: 4; grid-row: 7; }
#Db { grid-column: 5; grid-row: 7; }
#Sg { grid-column: 6; grid-row: 7; }
#Bh { grid-column: 7; grid-row: 7; }
#Hs { grid-column: 8; grid-row: 7; }
#Mt { grid-column: 9; grid-row: 7; }
#Ds { grid-column: 10; grid-row: 7; }
#Rg { grid-column: 11; grid-row: 7; }
#Cn { grid-column: 12; grid-row: 7; }
#Nh { grid-column: 13; grid-row: 7; }
#Fl { grid-column: 14; grid-row: 7; }
#Mc { grid-column: 15; grid-row: 7; }
#Lv { grid-column: 16; grid-row: 7; }
#Ts { grid-column: 17; grid-row: 7; }
#Og { grid-column: 18; grid-row: 7; }

/* lanthanides */
#Ce { grid-column: 4; grid-row: 10 }
#Pr { grid-column: 5; grid-row: 10 }
#Nd { grid-column: 6; grid-row: 10 }
#Pm { grid-column: 7; grid-row: 10 }
#Sm { grid-column: 8; grid-row: 10 }
#Eu { grid-column: 9; grid-row: 10 }
#Gd { grid-column: 10; grid-row: 10 }
#Tb { grid-column: 11; grid-row: 10 }
#Dy { grid-column: 12; grid-row: 10 }
#Ho { grid-column: 13; grid-row: 10 }
#Er { grid-column: 14; grid-row: 10 }
#Tm { grid-column: 15; grid-row: 10 }
#Yb { grid-column: 16; grid-row: 10 }
#Lu { grid-column: 17; grid-row: 10 }

/* Actinides */
#Th { grid-column: 4; grid-row: 11 }
#Pa { grid-column: 5; grid-row: 11 }
#U { grid-column: 6; grid-row: 11 }
#Np { grid-column: 7; grid-row: 11 }
#Pu { grid-column: 8; grid-row: 11 }
#Am { grid-column: 9; grid-row: 11 }
#Cm { grid-column: 10; grid-row: 11 }
#Bk { grid-column: 11; grid-row: 11 }
#Cf { grid-column: 12; grid-row: 11 }
#Es { grid-column: 13; grid-row: 11 }
#Fm { grid-column: 14; grid-row: 11 }
#Md { grid-column: 15; grid-row: 11 }
#No { grid-column: 16; grid-row: 11 }
#Lr { grid-column: 17; grid-row: 11 }

#overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 0px solid #222222;
    padding: 20px;
    opacity: 0.9;
}

/* Custom Styles */
#viewport-overlay {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
    z-index: 1;
}

#new-div {
    display: none;
    position: fixed;
    width: 80%; /* Increased width for better viewing */
    height: 700px; /* Fixed height of at least 700px */
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    padding: 20px;
    border: 5px solid #999999;
    background-color: rgb(0, 35, 62);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    overflow: auto;
    color: #eeeeee;
}

.close-button {
    position: absolute;
    top: 10px;
    right: 20px;
    cursor: pointer;
    font-size: 20px;
}            

.dialog-title {
    position: absolute;
    top: 10px;
    left: 15px;
    font-size: 25px;
}            

.content {
    margin-top: 30px;
}

.content iframe {
    border: none;
    border-radius: 5px;
}