:root {
    --vertical-whitepace: 30px;
    --background-color: #34495E;
    --text-color: #E4A03A;
    --button-background-color: #6081A9;
    --button-side-color: #6E94C2;
    --button-text-color: #FFFFFF;
    --table-border-color: rgba(228, 160, 58, 0.2);  /* Same as text-color but transparent */
}

* {
    margin: 0;
    padding: 0;
}

body  {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 30px 10px 20px 10px;
    background-color: var(--background-color);
    color: var(--text-color);
}

.wrapper {
    max-width: 600px;
    margin: 0 auto;
    padding: 0;
    text-align: center;
}

h1 {
    font-size: 2em;
    padding-bottom: var(--vertical-whitepace);
}

h2 {
    font-size: 1.5em;
    padding-bottom: 10px;
}

table {
    border-collapse: collapse;
}

th, td {
    padding: 6px 10px;
    border: none;
    text-align: left;
}

button {
    appearance: button;
    background-color: var(--button-background-color);
    border: solid transparent;
    border-radius: 16px;
    border-width: 0 0 4px;
    color: var(--button-text-color);
    cursor: pointer;
    font-weight: 700;
    letter-spacing: .8px;
    outline: none;
    padding: 13px 16px;
    touch-action: manipulation;
    transform: translateZ(0);
    transition: filter .2s;
    white-space: nowrap;
    -webkit-tap-highlight-color: transparent;
}

button:after {
    background-clip: padding-box;
    background-color: var(--button-side-color);
    border: solid transparent;
    border-radius: 16px;
    border-width: 0 0 4px;
    bottom: -4px;
    content: "";
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    z-index: -1;
}

button:hover {
    filter: brightness(1.1);
    -webkit-filter: brightness(1.1);
}

button:active {
  border-width: 4px 0 0;
  background: none;
}

#start-screen {
    display: block;
}

#game-screen {
    display: none;
}

#game-over-screen {
    display: none;
}

#highscore-screen {
    display: block;
}

#instruction-text {
    padding-bottom: var(--vertical-whitepace);
}

#start-button,
#start-again-button  {
    width: 300px;
    height: 100px;
    font-size: 2em;
    margin-bottom: var(--vertical-whitepace);
}

#question-display {
    font-size: 5em;
}

#answers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 20px;
    row-gap: 20px;
    margin: 0 0 var(--vertical-whitepace) 0;
}

#answers > button {
    height: 100px;
    font-size: 2em;
}

#answers > button.correct-answer {
    background-color: rgb(0, 128, 0);
}

#answers > button.correct-answer:after {
    background-color: rgb(0, 160, 0);
}

#answers > button.wrong-answer {
    background-color: #ff0000;
}

#answers > button.wrong-answer:after {
    background-color: #ff3030;
}

#result-display {
    padding-bottom: var(--vertical-whitepace);
}

#cancel-button {
    background-color: #ff0000;
    height: 60x;
}

#cancel-button:after {
    background-color: #ff3030;
}

#result-statistics-display {
    padding-bottom: var(--vertical-whitepace);
}

#result-statistics-display p {
    margin-bottom: 10px;
}

#results-answers-table {
    margin: 0 auto;
}

#results-answers-table tr {
    border-bottom: 1px solid var(--table-border-color);
}

.answer-icon {
    padding-right: 0;
}

.answer-icon img {
    position: relative;
    top: 2px;
}

#highscore-display table {
    margin: 0 auto 10px auto;
}

#highscore-display table tr.latest-game {
    background-color: #616111;
}

#points-explanation {
    font-style: italic;
    max-width: 400px;
    margin: 0 auto;
}

#no-highscore-text {
    font-style: italic;
}

@media (min-width: 600px) {
    h1 {
        font-size: 2.5em;
    }
    #question-display {
        font-size: 8em;
    }
    #answers {
        margin: 0 40px;
        margin: 0 40px var(--vertical-whitepace) 40px;
    }
}