:root {
    --color-primary: #d73953;

    --color-black: #090909;
    --color-white: #ffffff;
    --color-light-grey: #f3f3f3;
    --color-dark-grey: #353535;

    --text-color: var(--color-black);
    --color-header: #f7fad2;
    --color-main: #ffffff;
    --color-footer: #929292;

    --footer-height: 100vh;

    --font-family-base: "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-family-title: "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-size-small: 1.2rem;
    --font-size-medium: 1.6rem;
    --font-size-large: 1.8rem;
    --font-size-x-large: 2.3rem;
    --font-size-xx-large: 4.8rem;
    --font-weight-regular: 400;
    --font-weight-bold: 700;

    --transition-duration: .3s;
    --transition-cubic-bezier: cubic-bezier(0.17, 0.67, 0, 1.01);
}
/* VARIABLES END */

/* RESET START */
/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}
/* RESET END */

/* GENERIC START */
html {
    scroll-behavior: smooth;
    font-size: 62.5%;
}

body {
    width: 100%;

    color: var(--text-color);
    font-family: var(--font-family-base);
    font-size: var(--font-size-medium);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-base);

    display: flex;
    flex-direction: column;
    flex-flow: column;
    align-content: center;
    justify-content: space-between;
    align-items: stretch;
    flex-wrap: nowrap;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-title);
    font-weight: var(--font-weight-bold);
}

a:link {
    color: var(--text-color);
    text-decoration: none;
}

a:visited {
    font-style: italic;
}

a:hover {
    text-decoration: underline;
}

a:visited {
    color: var(--text-color);
}

.atomic-age {
    font-family: 'Atomic Age';
    font-weight: 400;
    font-style: normal;
}

.unselectable {
    user-select: none;
    -webkit-user-drag: none;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
}
/* GENERIC END */

/* HEADER AND FOOTER START */
#body-header {
    top: 0;
    width: 100%;
    position: fixed;
}

#body-header > * {
    min-height: 1rem;
    width: 100%;
}

.header-div {
    background-color: var(--color-header);
    padding: 0 5vw;
}

#header-nav li a {
    display: block;
    padding: 10px;
}

#header {
    width: 100%;
    padding: 0;

    display: flex;
    flex-direction: row;
    flex-flow: row;
    align-content: center;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

#header-name-div {
    padding-left: 2.5vw;
}

#header-dropdown-div {
    padding-right: 0;
}

#header-dropdown-btn {
    background-color: #04AA6D;
    color: white;
    padding: 2vh 2.5vw;
    font-size: 16px;
    border: none;
}

#header-dropdown-content {
    display: none;
    position: absolute;
    background-color: #f1f1f1;
    min-width: 2.5vw;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

#header-dropdown-content a {
    color: black;
    padding: 12px 2.5vw;
    text-decoration: none;
    display: block;
}

#header-dropdown-content a:hover {background-color: #ddd;}
#header-dropdown:hover #header-dropdown-content {display: block;}
#header-dropdown:hover #header-dropdown-btn {background-color: #3e8e41;}

#header ul {
    display: flex;
    flex-flow: row;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    flex-direction: row;
}

#header-name {
    font-size: large;
    padding: 0;
}


#header-nav {
    display: flex;
    flex-flow: row;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
}

#header-nav ul {
    display: flex;
    flex-flow: row;
    justify-content: space-around;
    align-items: center;
    flex-wrap: nowrap;
    flex-direction: row;
}


#header-nav li a {
    padding: 2vh 3vw;
}

#header-nav a:hover {
    color: white;
    background-color: red;
    text-decoration: none;
}
/* HEADER AND FOOTER END */

/* MATH START */
#math-main {
    height: 93vh;
    width: 100vw;
    display: flex;
    flex-direction: column;
}
#math-select-div {
    display: flex;
    flex-direction: row;
    width: 60%;
}
.math-select {
    width: 100%;
    padding: 10px;
    margin: 10px;
}
#math-select-areas {
    display: block;
}
#math-select-programs {
    display: block;
}
.math-hr {
    width:99.8%;
    text-align:left;
    margin: 0 0 1rem 0;
}
#math-main {
    height: 93vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    align-content: center;
}
#math-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
}
.math-matrix {
    display: flex;
    flex-direction: row;
    align-items: center;
    margin: 5px;
}
.math-matrix-coefficient {
    width: 4rem;
    height: 2rem;
    margin: 0 1rem 2.5rem 1rem;
    border: 0.5px solid rgb(118, 118, 118);
    background-color: rgb(252, 252, 255);
}
.math-matrix-table-data-input {
    text-align: center;
    width: 5rem;
    height: 2.5rem;
    margin: 2px;
}
.math-matrix-table-data-input:disabled {
    color: black;
}
.math-program-wrapper {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-evenly;
}
.math-center-div {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}
.math-height-wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}
.math-width-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.math-size-button-plus, .math-size-button-minus {
    height: 2rem;
    width: 2rem;
    margin: 2px;
    display: flex;
    justify-content: center;
    align-content: center;
    border-style: solid;
    border-width: 0.5px;
    border-color: rgb(118, 118, 118);
}
.math-size-button-plus {
    background-color: rgb(250, 255, 250);
}
.math-size-button-minus {
    background-color: rgb(255, 250, 250)
}
.math-input-matrix-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
#math-matrix-power-input {
    text-align: center;
    vertical-align: center;
    width: 4rem;
    height: 2rem;
    margin: 2px;
}
.math-power-wrapper {
    display: flex;
    flex-direction: row;
    width: 100%;
    align-items: center;
    justify-content: flex-end;
}
#math-mult-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}
#math-mult-table {
    height: 100%;
    display: table;
    table-layout: fixed;
}
.math-mult-table-row {
    display: flex;
    flex-direction: row;
    height: 100%;
    align-items: flex-start;
    justify-content: center;
}
.math-mult-table-data {
    box-sizing: border-box;
    display: flex;
    height: 100%;
    align-items: center;
    justify-content: center;
}
#math-mult-table-data-00 {
    width: 283px;
    justify-content: flex-end;
}
#math-mult-table-data-10 {
    justify-content: flex-end;
}
#math-mult-table-data-01 {
    justify-content: flex-start;
}
#math-mult-table-data-11 {
    justify-content: flex-start;
    padding-left: 4rem;
}
#math-error-message {
    display: none;
    color: red;
    margin: 4px;
}
.math-calc-button {
    margin: 2px 1rem 2rem 1rem;
    border: 0.5px solid rgb(118, 118, 118);
}
#math-power-program-wrapper {
    align-items: center;
}
.math-operation-p {
    margin-left: 1rem;
    margin-right: 0.5rem;
}
.math-info-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    align-content: center;
}
.math-info-h1 {
    margin: 2rem;
}
.math-info-p {
    margin: 2rem;
}
/* MATH END */