html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto Flex', sans-serif;
    font-size: 16px;
    color: rgb(66, 66, 66);
    background-color: #ffffff;
    scroll-behavior: smooth;
}

.max-width-container {
    max-width: 1200px;
    margin: auto;
    position: relative;
    height: 100%;
}



/* home page */
nav {
    width: max-content;
    padding: .8rem 0;
    box-sizing: border-box;
    position: absolute;
    top: 0;
    z-index: 10000;
    font-size: 1.2rem;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

a {
    display: inline-block;
    padding: .2em .4em;
    margin: 0 10px;
    text-decoration: none;
    color: rgb(66, 66, 66);
    font-weight: 500;
}

.hamburger {
    position: sticky;
    top: 50%;
    max-width: 1200px;
    margin: auto;
    z-index: 100;
    float: left;
}

#main .hamburger {
    float: none;
}

.navbar {
    /* position: fixed;
    top: 50%; */
    transform: translateY(-50%);
    z-index: 100;
}

.navbar a {
    display: inline-block;
    padding: .2em .4em;
    margin: 0.2em 10px;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.418);
    transition: all 0.3s;
    font-family: 'Playfair Display', serif;
    letter-spacing: 1mm;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 700;
}

.navbar a:hover {
    color: white;
}

#hero {
    height: 100vh;
    width: 100%;
    position: relative;
    z-index: 2;
}

#hero p {
    text-align: center;
    display: block;
    margin-bottom: 2rem;
}

#hero .text-wrap {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 300px;
    height: calc(100vh - 305px - 3rem);
    background-color: white;
    border-top: solid 1px rgb(66, 66, 66);
    padding: 3rem 0 0 0;
}

.img-0,
.img-bg {
    margin: 0;
    padding: 0;
    position: sticky;
    top: 20vh;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    margin: 0;
    padding: 0;
    margin-bottom: 1rem;
    text-align: center;
    font-family: 'Playfair Display', serif;
}

p {
    margin: 0;
    padding: 0;
    line-height: 150%;
}

.button {
    font-family: 'Playfair Display', serif;
    margin: auto;
    padding: 0.3em 0.8em;
    border: solid 1.5px rgb(66, 66, 66);
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    box-sizing: border-box;
    transition: 0.3s
}

.button:hover {
    border: solid 1.5px rgba(66, 66, 66, 0);
    border-bottom: solid 3px rgb(66, 66, 66);
}

.fa-solid {
    margin: 0 12px 0 0;
}

.js-sticky-container {
    position: relative;
    width: 100%;
}

.img-bg {
    mix-blend-mode: luminosity;
    position: fixed;
    top: 18.5vh;
    max-width: 700px;
    width: 60vw;
}

.scrollwrap {
    height: 200vh;
    justify-content: center;
    align-items: center;
}

#history {
    background-color: #EA733C;
}

#symbols {
    background-color: #2C98DF;
}

#math-science {
    background-color: #95C37B;
}

h3 {
    margin: 0;
    padding: 0;
    padding-top: 160px;
    color: white;
    font-family: 'Playfair Display', serif;
    font-size: 90px;
}

.scrollwrap .text-wrap {
    position: sticky;
    top: 22vh;
    margin: 0 15rem;
    padding-bottom: 12rem;
}

.img-cover {
    width: 200px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
}

#main p {
    color: white;
    max-width: 500px;
    margin: 2rem 0;
}

#main .button {
    border: solid 1.5px white;
    color: white;
}

#main .button:hover {
    border: solid 1.5px rgba(255, 255, 255, 0);
    border-bottom: solid 3px white;
    color: white;
}


.footer {
    margin: 1rem 3rem 3rem 3rem;
}

.footer a {
    font-size: 3rem;
    margin-left: 0;
    padding-left: 0.8rem;
}

.grid-wrap {
    margin-left: 0.8rem;
    display: grid;
    grid-template-columns: 400px 200px 200px;
    column-gap: 100px;
}

h4 {
    text-transform: uppercase;
    font-family: 'Playfair Display', serif;
    letter-spacing: 1mm;
}

.footer p {
    font-size: 0.8rem;
}

.copyright {
    margin-top: 1rem;
}

.grid-wrap a {
    font-size: 0.8rem;
    text-decoration: underline;
    padding: 0;
    margin: 0;
}



/* child pages */
#child-body #hero .text-wrap {
    width: 500px;
    top: 100px;
    border-top: none;
}

#child-main {
    color: black;
}

#child-main .text-wrap {
    margin: 0 15rem;
    padding-bottom: 50px;
    padding-top: 100px;
}

#child-main h3 {
    padding: 0;
    margin: 50px 0;
}

#child-main p {
    margin-bottom: 1rem;
}

#child-main img {
    padding: 3rem 3rem;
    max-width: 400px;
    max-height: 200px;
    margin: auto;
    display: block;
}

.more {
    width: 100%;
}

.more h4 {
    text-align: center;
}

.more-wrap {
    height: 300px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin: 0;
    column-gap: 0;
}

.more .button {
    border: solid 1.5px white;
    color: white;
    top: 50%;
    transform: translate(-50%, -50%);
}

.more .button:hover {
    border: solid 1.5px rgba(255, 255, 255, 0);
    border-bottom: solid 3px white;
    color: white;
}

/* child pages: history */
.history h3,
#nav-history a {
    color: #EA733C;
}

/* child pages: symbols */
.symbols h3,
#nav-symbols a {
    color: #2C98DF;
}

.symbols .large {
    text-align: center;
    font-size: 3rem;
}

.symbols h4,
.math-science h4 {
    margin-top: 4rem;
}

/* child pages: symbols */
.math-science h3,
#nav-math-science a {
    color: #95C37B;
}

.math-science ul {
    list-style: disc;
    padding-left: 1rem;
}

.math-science li {
    margin: 0.5rem 0;
}

/* hamburger menu */
.hamburger-btn {
    position: fixed;
    top: 1rem;
    right: 0.8rem;
    z-index: 10000;
    background-color: transparent;
    border: none;
    cursor: pointer;
    display: none;
}


@media (max-width: 1062px) {
    h3 {
        font-size: 60px;
    }

    .footer .grid-wrap {
        display: flex;
        flex-direction: column;
    }

    #child-main .text-wrap {
        margin: 0 100px;
    }

    .navbar {
        display: none;
    }

    .hamburger-btn {
        display: block;
    }

    .show {
        display: block;
        height: 100vh;
        padding-top: 100px;
        padding-left: 48px;
        padding-right: 48px;
        background-color: rgba(255, 255, 255, 0.9);
        width: 50%;
        position: fixed;
        margin-left: 45%;
        top: 50vh;
    }

    .show a {
        color: rgb(66, 66, 66);
    }

    .show a:hover {
        color: rgb(66, 66, 66);
    }

    .hamburger {
        float: none;
    }

}

@media (max-width: 850px) {
    .img-bg {
        top: 20.5vh;
    }

    #hero .text-wrap {
        top: 300px;
        height: calc(100vh - 305px px - 3rem);
    }

    #child-main img {
        box-sizing: border-box;
        padding: 3rem 1rem;
        max-width: 100%;
        max-height: 200px;
        margin: auto;
        display: block;
    }

    .scrollwrap .text-wrap,
    #child-main .text-wrap {
        margin: 0 5rem;
    }
}

@media (max-width: 540px) {

    .scrollwrap .text-wrap,
    #child-main .text-wrap {
        margin: 0 2rem;
    }

    .show {
        padding-left: 16px;
        padding-right: 16px;
    }

    .img-0 {
        width: 160px;
    }

    #hero .text-wrap {
        top: 235px;
        height: calc(100vh - 245px - 3rem);
    }

    .img-bg {
        width: 94vw;
        top: 27vh;
    }

    h3 {
        font-size: 48px;
    }

    h2 {
        font-size: 24px;
    }

}

/* Qs: how to  */