:root {
    --color-black: #333231;
    --color-white: #e5e0dd;
    --color-gray: #a4a19c;
    --color-midd: #858280;
    --color-link: #33a;
}

html {
    height: 100%;
    color: var(--color-black);

    font-family: cursive;
    font-size: 24px;
}

body {
    margin: 0;
    height: 100%;

    background: linear-gradient(180deg, var(--color-white) 80%, var(--color-gray) 115%);
    background-attachment: fixed;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;

    height: 100%;
    max-width: 1200px;

    margin: 0 auto;
}

#hexagram-borad {
    grid-column: 1 / 2;
    grid-row: 1 / 3;

    display: flex;
    flex-direction: column-reverse;
    justify-content: center;
    align-items: center;

    gap: 1.5vw;
}

.hexagram {
    width: 33vw;
    max-width: 400px;
    aspect-ratio: 6 / 1;

    background-color: var(--color-black);
    border: none;
    padding: 0;
}

.hexagram[data-negtive] {
    background: linear-gradient(90deg, var(--color-black) 0% 45%, transparent 45% 55%, var(--color-black) 55% 100%);
}

.hexagram:focus {
    outline: none;
}

/* .hexagram::before, */
.hexagram:focus::before,
.hexagram:hover::before {
    content: "";
    display: block;
    position: relative;
    top: 0;
    left: 0;
    /* width: 45%; */
    height: 100%;
    box-shadow: 0px 0px 16px 0px var(--color-black);
}

/* .hexagram[data-negtive]::before, */
.hexagram[data-negtive]:focus::before,
.hexagram[data-negtive]:hover::before {
    content: "";
    display: block;
    position: relative;
    top: 1px;
    left: 1px;
    width: calc(45% - 2px);
    height: calc(100% - 2px);
    box-shadow: 0px 0px 16px 0px var(--color-black);
}

/* .hexagram[data-negtive]::after, */
.hexagram[data-negtive]:focus::after,
.hexagram[data-negtive]:hover::after {
    content: "";
    display: block;
    position: relative;
    top: calc(-100% - -2px);
    left: calc(55% + 1px);
    width: calc(45% - 2px);
    height: calc(100% - 2px);
    box-shadow: 0px 0px 16px 0px var(--color-black);
}

/* ================ */

#explain,
#website {
    width: 20rem;
    margin: 0 auto;
}

#website {
    align-content: end;
}

.list-block {
    padding: 0;
}

.explain-list {
    list-style-type: none;
}

.small-title {
    display: inline-block;
    width: 3rem;

    font-size: calc(1rem - 4px);
    font-weight: bold;
    color: var(--color-midd);
}

.website-link {
    display: inline-block;

    font-size: calc(1rem - 4px);
    font-weight: bold;
    color: var(--color-link);

    text-decoration: none;
}

.website-link:hover {
    text-decoration: underline;
}

@media (max-width: 1000px) {
    html {
        font-size: 20px;
    }
}

@media (max-width: 750px) {
    main {
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;

        padding-top: 1rem;
        gap: 1rem;
        height: auto;
    }
}

@media (max-width: 700px) {
    html {
        font-size: 18px;
    }

    .hexagram {
        width: 45vw;
    }
}

@media (max-width: 380px) {
    html {
        font-size: 16px;
    }

}