body {
    margin: 0px;
    font-family: "Museo Slab 300";
    color: black;
    font-size: 12px;
}

div,
input,
textarea {
    box-sizing: border-box;
}

.main {
    text-align: center;
}

.title {
    font-size: 50px;
    margin: 20px;
}

.board {
    height: 666px;
    position: relative;
}


.hex {
    height: 210px;
    width: 130px;
    background: black;
    position: absolute;
    box-sizing: border-box;
    transform: translateX(-50%);
}

.hex::before, .hex::after {
    content: "";
    position: absolute;
    height: 0;
    width: 0; 
    top: 0;
    /* half height */
    border-top: 105px solid transparent;
    border-bottom: 105px solid transparent; 
}

.hex::before {
    left: -50px;
    border-right: 50px solid black; 
}

.hex::after {
    right: -50px;
    border-left: 50px solid black; 
}

.hex-inner {
    z-index: 100;
    height: 200px;
    width: 120px;
    background: white;
    position: absolute;
    box-sizing: border-box;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hex-inner::before, .hex-inner::after {
    content: "";
    position: absolute;
    height: 0;
    width: 0; 
    top: 0;
    /* half height */
    border-top: 100px solid transparent;
    border-bottom: 100px solid transparent; 
}

.hex-inner::before {
    left: -50px;
    border-right: 50px solid white; 
}

.hex-inner::after {
    right: -50px;
    border-left: 50px solid white; 
}

.hex .letter {
    font-size: 85px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    position: absolute;
}

.h0 {
    top: 10px;
    left: 50%;
}

.h1 {
    top: 115px;
    left: calc(50% + 190px);
}

.h2 {
    top: 334px;
    left: calc(50% + 190px);
}

.h3 {
    top: 442px;
    left: 50%;
}

.h4 {
    top: 334px;
    left: calc(50% - 190px);
}

.h5 {
    top: 115px;
    left: calc(50% - 190px);
}

.h6 {
    top: 226px;
    left: 50%;
}

.h6 .hex-inner {
    background: yellow;
}

.h6 .hex-inner::before {
    border-right: 50px solid yellow; 
}

.h6 .hex-inner::after {
    border-left: 50px solid yellow; 
}

.solution {
    font-size: 50px;
    background: yellow;
    padding: 10px 30px;
    border: 5px solid black;
    cursor: pointer;
    margin-bottom: 10px;
    width: 50%;
    display: inline-block;
    position: relative;
}

.solution .curtain {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: black;
    color: white;
    padding: 10px 30px;
    font-size: 25px;
}

.solution .curtain .text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.reset {
    display: inline-block;
    background: red;
    border-radius: 20px;
    border: 2px solid black;
    cursor: pointer;
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 30px;
    font-size: 35px;
    color: white;
}

.source {
    font-style: italic;
    padding: 40px;
}

.source .highlighted {
    font-weight:  bold;
    color:  red;
}