:root {
    --background-white: #FFFFFF;
    --rectangle-color: #3042ff;
    --default-black: black;
    --scrollbar-color: rgba(0, 255, 157, 0.303);
}

* {
    scrollbar-color: var(--scrollbar-color) var(--background-white);
}

body {
    background: var(--background-white);
    margin-top: 50px;
}

.rectangles-container {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    margin-top: 1vh;
    margin-left: 5vw;
    height: 80vh;
    width: 90vw;
    min-width: 1000px;
    min-height: 500px;
}

@media screen and (max-width: 1000px) {
    .rectangles-container {
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        margin-top: 1vh;
        margin-left: 1vw;
        height: inherit;
        width: 90vw;
        min-width: inherit;
        min-height: inherit;
    }

    html .category-rectangle,
    html .subcategory-rectangle,
    html .contents-rectangle {
        width: 100%;
        position: inherit;
    }

    html .subscribe-form-button {
        position: absolute;
        top: 20px;
        right: 30px;
    }

    html .content-actual {
        overflow: inherit;
        height: inherit;
    }

}

.category-rectangle,
.subcategory-rectangle,
.contents-rectangle {
    border: 1px solid var(--rectangle-color);
    height: 100%;
    margin: 10px;
}

.category-rectangle,
.subcategory-rectangle {
    width: 18%;
}

.contents-rectangle {
    width: 54%;
    position: relative;
}

.category-title,
.subcategory-title {
    display: block;
    font-family: monospace;
    position: relative;
    align-items: center;
    justify-content: center;
    padding: 15px;
    border: none;
    border-bottom: 1px solid var(--rectangle-color);
    cursor: pointer;
}

.content-title {
    display: block;
    font-family: monospace;
    position: relative;
    align-items: center;
    justify-content: center;
    padding: 15px;
    border: none;
    border-bottom: 1px solid var(--rectangle-color);
    cursor: pointer;
}

.content-actual {
    font-family: monospace;
    position: relative;
    align-items: center;
    justify-content: center;
    padding: 15px;
    overflow: scroll;
    height: calc(75vh - 40px);
}

.category-title[isselected=true] {
    background-color: var(--rectangle-color);
    color: var(--background-white);
}

.category-title[isselected=false] {
    background-color: var(--background-white);
    color: var(--default-black);
}

.subcategory-title[isselected=true] {
    background-color: var(--rectangle-color);
    color: var(--background-white);
}

.subcategory-title[isselected=false] {
    background-color: var(--background-white);
    color: var(--default-black);
}

.content-title[isselected=true] {
    background-color: var(--rectangle-color);
    color: var(--background-white);
}

.content-title[isselected=false] {
    background-color: var(--background-white);
    color: var(--default-black);
}

::-webkit-scrollbar {
    -webkit-appearance: none;
    width: 10px;
    top: 15px;
}
  
::-webkit-scrollbar-thumb {
    border-radius: 2px;
    background-color: var(--scrollbar-color);
    -webkit-box-shadow: 0 0 1px rgba(255,255,255,.5);
}

/** Subscribe modal **/
.subscribe-form-button {
    position: absolute;
    top: -30px;
    right: 0px;
    border: 1px solid var(--rectangle-color);
    background-color: var(--background-white);
    font-family: monospace;
}

.subscribe-form-button:hover {
    background-color: var(--rectangle-color);
    color: var(--background-white);
    cursor: pointer;
}

.email-input {
    font-family: monospace;
    margin-right: 10px;
}

.email-submit-button {
    font-family: monospace;
    cursor: pointer;
}

.close-div {
    position: absolute;
    top: 1px;
    right: 1px;
}

.close {
    box-sizing: border-box;
    position: relative;
    display: block;
    transform: scale(var(--ggs,1));
    width: 22px;
    height: 22px;
    border: 2px solid transparent;
    border-radius: 40px;
    color: #aaaaaa;
    cursor: pointer;
}
.close::after,
.close::before {
    content: "";
    display: block;
    box-sizing: border-box;
    position: absolute;
    width: 16px;
    height: 2px;
    background: currentColor;
    transform: rotate(45deg);
    border-radius: 5px;
    top: 8px;
    left: 1px
}
.close::after {
    transform: rotate(-45deg)
}

/** Table **/
table {
    border-collapse: collapse;
    border: 1px solid black;
    font-variant-numeric: tabular;
}

th {
    font-weight: bold;
    border: 1px solid black;

}
  
tr:nth-child(2) td {
   padding-top: 12px;
   border: 1px solid black;
}

tr:nth-child(odd) td {
    background: #f2f2f2;
    border: 1px solid black;
}

th, td {
    text-align: left;
    padding: 6px 12px;
    border: 1px solid black;
}

/** Quote **/
blockquote {
    margin-left: 1em;
    border-left: 4px rgb(224, 223, 223) solid;
    font-style: italic;
    color: rgb(115, 115, 115);
}

blockquote > p {
    margin-left: 1em;
}

/** Image **/
img[alt$="><"] {
    display: block;
    max-width: 100%;
    height: auto;
    margin: auto;
    float: none!important;
}

/** Code **/
code {
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    border-radius: 3px;
    overflow: auto;
    font-family: Courier, monospace;
    padding: 0;
    font-size: 14px;
    color: #353535;
}