*, *::after, *::before {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    margin: 0;    
}
h1 {
    font-family: 'Roboto';
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 1.5px;
    line-height: 1em;
    text-align: center;    
}
h2 {
    font-family: 'Roboto';
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 1px;
}
h3 {
    font-size: 1.2rem;
    font-weight: 600;
}
footer p {
    color: aliceblue;
}
a :hover {
    cursor: pointer;
}
#sign-up :hover {
    cursor: pointer;
}
.spacer {
    width: 100%;
    height: 3rem;
}


/****************************************
        Header
*****************************************/

#sign-up, .main-nav {
    display: none;
}

.header {
    background: url("../images/coding/Kidsoncomputersminibg.jpg"), rgba(196, 196, 196, 0.3);
    background-size: contain;
    background-position: top;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-blend-mode: multiply;
    width: 100%;
    height: 310px;
    margin-top: 0;
    padding-top: 0;
    z-index: 100;
}
.headerctr {
    width: 98%;
    margin: 0 auto;
}

.headerflex {
    display: flex;
    flex-wrap: nowrap;
    width: 100%;
    text-align: left;
    padding: 0;
    gap: .1rem;
    margin: 0 auto;
}
.headerflex  > *:nth-child(1) {
    flex-basis: 1 1 60%;
    min-width: 60%;
}
.headerflex  > *:nth-child(2) {
    flex-basis: 1 1 40%;
    min-width: none;
}

.logo {
    display: inline-block;
    min-width: none;
}
.title-wrap {
    display: inline-block;
    min-width: none;
}

#mobile-navbar {
    display: inline-block;
    position: absolute;
    align-items: center;
    top: 20px;
    right: 10px;
    margin: 0rem 0rem 0 0;
}
.logo {
    display: inline-block;
}
.logo img {
    float: right;
    width: 85px;
    height: auto;
    margin-top: 0;
    padding-top: 0;
}
.title-wrap {
    margin-top: .5rem;
    vertical-align: top;
    line-height: .5rem;
}

.title-wrap a {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: ghostwhite;
    line-height: 1rem;
    text-decoration: none;
    margin-top: 2rem;
    letter-spacing: 0px;
    padding-bottom: 0;
    margin-bottom: 0;
    
}
.title-wrap p {
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    color: ghostwhite;
    text-align: left;
    max-width: 25ch;
    padding-top: .5rem;
    margin-top: 0;
    font-size: .7375rem;
    line-height: 1rem;
    letter-spacing: 0px;
}

 
.title {
    display: block;
    width: 100%;
    color: ghostwhite;
    text-align: center;
    padding-top: .5rem;
    margin: 0 auto;
}




/********************************
        Main Section
********************************/


.icons-wrapper {
    width: 100%;
    text-align: center;
    margin-top: 3rem;
}
.icons {
    display: inline-block;
    margin: 0 auto;

}
.icons img {
    width: auto;
    height: 70px;
    margin: 0.5rem;
}
#border {
    border-radius: 20px;
}

main {
    position: relative;
    width: 100%; 
    padding-bottom: 2rem;   
}
.class-container {
        width: 95%;
        margin: 0 auto;
}
.wrapper {
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid rgba(0, 0, 255, 0.15);
}




/**********************************
        Intro Article
**********************************/


.intro-desc p {
    line-height: 1.5rem;
    text-rendering: optimizeLegibility;
}


.intro {
    width: 90%;
    margin: 0 auto;
}
.textwrap {
    float: right;
    margin: 1.5rem;
}
.intro img {
    width: 45%;
    height: auto;
    margin-top: 0.1rem;
    border-radius: 18px 0 18px 0;
    box-shadow: 4px 4px 8px #535353;
}


.introflex {
    gap: 2.5rem;
    position: relative;
    margin-top: 5rem;
    margin-bottom: 3rem;

    
}

/*************************************
            Toggle Control
**************************************/
.classtoggle {
    width: 50%;
    text-align: center;
    margin: 0 auto 1.5rem;
}
.classoptions {
    align-content: center;    
}
.classoptions span {
    display: inline-block;
    background-color: rgb(36, 163, 236);
    color: rgb(248, 163, 30);
    border: 2px solid rgb(248, 163, 30);
    width: 170px;
    font-size: 1rem;
    font-weight: 900;
    text-transform: uppercase;
    text-align: center;
    text-decoration: none;
    padding: .5rem 0rem;
    margin: 0;
}
#semester {
    border-radius: 20px 20px 0 0;
}
#all {
    border-radius: 0 0 20px 20px;
}

.classoptions span:hover {
    cursor: pointer;
    background-color: rgb(248, 163, 30);
    color: rgb(36, 163, 236);
    border: 2px solid rgb(36, 163, 236);

}

/*******************************
         TOGGLE
*******************************/



/***********************************
    Flex config 1
***********************************/

.wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 2.5rem;
    position: relative;
    margin-top: 5rem;
    margin-bottom: 3rem;
    margin: 0 auto;
    

    
}
.wrapper > * {
    flex: 1 1 10em;
    margin: 2rem auto;
    
}

.class-container iframe {
    width: 100%;
    height: auto;  
    max-width: 300px;
    margin-top: 2rem;
}

.logo-container img {
    width: 100%;
    height: auto;
    border-radius: 30px;
}

.thumbs {
    text-align: center;
    margin: 0 auto;
}
.thumbs img {
    display: inline-block;
    width: 175px;
    height: auto;
    border-radius: 10px;
    margin: 0 .5rem;
}

.class-description table {
    width: 100%;
}

.class-description p {
    font-size: 1rem;
    text-align: left;
    line-height: 1.6rem;
    max-width: 70ch;
    text-rendering: optimizeLegibility;
}
.requirements {
    font-size: 1rem;
    text-align: left;
    line-height: 1.6rem;
    max-width: 70ch;
    text-rendering: optimizeLegibility;
}









footer {
	position: relative;
    display: block;
	height: 230px;
    margin-top: 4rem;
	bottom: 0;
	width: 100%;
	background-color: #191919;
    margin-bottom: 0;
    padding-bottom: 0;
}
.footer {
    font-family: 'Roboto';
    font-weight: 400;
    color: #d3d3d3;
    text-align: center;
    line-height: 1.5rem;
    letter-spacing: 1px;
    padding-top: 2rem;
    padding-bottom: .5rem;
    margin-top: 2rem;

}



.cols {
    display: flex;
    flex-wrap: wrap;
}
.cols > * {
    flex-basis: 1 1 1;
    margin: 0 auto;
    
}
.cols {
    color: #fff;
}
.cols li {
    list-style: ;none;
    color: #d3d3d3;
}

/*----------------------
     Mobile Nav
-------------------------*/


.mobile-navbar {
    width: 100vw;
    text-align: right;
    display: block;
    padding: 0;
    margin: 0;
}

/* Style the button that is used to open and close the collapsible content */
.collapsible {
    font-family: 'Noto sans', sans-serif;
    font-size: 1.5rem;
    background-color: rgb(255, 0, 0);
    color: ghostwhite;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border: 2px solid rgb(255, 0, 0);
    border-radius: 2px;
    text-align: center;
    outline: none;
    margin-left: 0rem;
    
  }
  
  /* Add a background color to the button if it is clicked on (add the .active class with JS), and when you move the mouse over it (hover) */
  .active, .collapsible:hover {
    background-color: rgb(255, 0, 0);
  }
  
  /* Style the collapsible content. Note: hidden by default */
  .content {
    padding: 0;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;  
  }
  
  .collapsible:after {
      content: '\2630'; /* Unicode character for "plus" sign (+) */
    }  
    
    .active:after {
      content: '\0078'; /* Unicode character for "minus" sign (-) */
     
    }


nav {
    display: block;
    position: relative;
}
.menu a {
    text-decoration: none;
    list-style: none;
    text-transform: uppercase;   
    text-align: left;
    margin: 0;
    padding: 0;
}

nav ul li {
    display: block;
    width: 100%;
    font-size: 1rem;
    list-style: none;
    line-height: 20px;
    padding-top: 5px;
    padding-bottom: 5px;
    /*background: rgb(97, 96, 100);*/
    border-bottom: 1px solid black;
    opacity: .8;
}

nav ul li a {
    display: block;
    text-decoration: none;
}
nav a:hover {
    color: rgb(255, 0, 0);
}
nav a:active {
    color: rgb(255, 0, 0);
}


/* unvisited link */
nav a:link {
    text-decoration: none;
    color: black;
}
  
  /* visited link */
nav a:visited {
    text-decoration: none;
    color: black;
    opacity: .8;
}

nav li a:hover {
    color: rgb(255, 0, 0);
}

@media screen and (min-width: 420px) {
    .headerctr {
        width: 90%;
        margin: 0 auto;
    }

    .headerflex {
        width: 100%;
}
}
/****************************
     Media Screen 760
*****************************/

@media screen and (min-width: 760px){
    .main-nav {
        display: none;
    }
    
    h1 {
        font-family: 'Roboto';
        font-size: 4rem;
        font-weight: 900;
        letter-spacing: 1.5px;
        line-height: 1em;
        text-align: center;    
    }
    h2 {
        font-family: 'Roboto';
        font-size: 2rem;
        font-weight: 700;
        letter-spacing: 1px;
    }
    h3 {
        font-size: 1.2rem;
        font-weight: 600;
    }
    
    
    .header {
        background: url("../images/coding/Kidsoncomputersminibg.jpg"), rgba(196, 196, 196, 0.45);
        background-size: cover;
        background-position: top;
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-blend-mode: multiply;
        width: 100%;
        height: 500px;
        margin-top: 0;
        padding-top: 1rem;
        z-index: 100;
    }
    .headerflex {
        display: flex;
        flex-wrap: nowrap;
        width: 100%;
        padding: .5rem 0;
        gap: 0rem;
        margin: 0 auto;
    }
    
    .headerflex  > *:nth-child(1) {
        flex-basis: 1 1 30%;
        min-width: 350px;
    }
    .headerflex  > *:nth-child(2) {
        flex-basis: 1 1 70%;
        min-width: none;
        text-align: left;
    }
    .logo {
        display: inline-block;
        margin-left: .2rem;
    
    }
    .title-wrap {
        display: inline-block;
        margin-left: .2rem;
        text-align: left;
    }
    
    
    
    /*****************************
        Header Styles
    *****************************/
    .logo img {
        width: 100px;
        height: auto;
    }
 
    .title-wrap {
        line-height: .5rem;
        vertical-align:top;
        padding-top: .5rem;
    }
    .title-wrap a {
        font-family: 'Montserrat', sans-serif;
        font-weight: 700;
        font-size: 1.3rem;
        color: ghostwhite;
        text-align: left;
        text-decoration: none;
        padding-top: 0rem;
        letter-spacing: 0px;
        padding-bottom: 0;
        margin-bottom: 0;
        
    }
    .title-wrap p {
        font-family: 'Montserrat', sans-serif;
        font-weight: 400;
        color: ghostwhite;
        text-align: left;
        max-width: 25ch;
        padding-top: .5rem;
        margin-top: 0;
        font-size: .9rem;
        letter-spacing: 0px;
    }
    
     




    .title {
        display: block;
        width: 100%;
        color: ghostwhite;
        text-align: center;
        padding-top: 4rem;
        margin: 0 auto;
    }

    .classtoggle {
        width: 100%;
        text-align: center;
        margin: 5rem auto 2rem;
    }
    #semester {
        border-radius: 20px 0 0 20px;
    }
    #all {
        border-radius: 0 20px 20px 0;
    }


    .icons img {
        width: auto;
        height: 100px;
        margin: 0.5rem;
    }
    .intro img {
        width: 50%;
        height: auto;
        margin-top: 2rem;
        border-radius: 50px 0 50px 0;
        box-shadow: 4px 4px 8px #535353;
    }  
    .intro {
        width: 90%;
        margin: 0 auto;
    }
    .textwrap {
        float: right;
        margin: 1.5rem;
    }
    .class-container {
        width: 90%;
        margin: 0 auto;
    }
    #iframe {
        width: 500px;
        height: 280px;
        margin: 0 auto;
    }
    .class-container iframe {
        width: 100%;
        height: 100%;
        max-width: none;
        margin: 0 auto;
    }
    .class-logo {
        text-align: center;
    }
    .logo-container img {
        display: inline-block;
        width: auto;
        height: auto;
        border-radius: 30px;
        margin: 0 auto;
    }
    
    .thumbs img {
        display: inline-block;
        width: 175px;
        height: auto;
        border-radius: 10px;
        margin: 0 .5rem;
    }
    footer {
        position: relative;
        display: block;
        height: 200px;
        margin-top: 4rem;
        bottom: 0;
        width: 100%;
        background-color: #191919;
        margin-bottom: 0;
        padding-bottom: 0;
    }
    .footer {
        font-family: 'Roboto';
        font-weight: 400;
        color: #d3d3d3;
        text-align: center;
        line-height: 1.5rem;
        letter-spacing: 1px;
        padding-bottom: .5rem;
        margin-top: 2rem;
    
    }
}

@media screen and (min-width: 860px){
    #mobile-navbar {
        display: none;
    }
    #sign-up {
        display: initial;
    }
    #sign-up {
        margin-top: .8rem;
        margin-left: 1rem;
    }
    .main-nav {
        display: inline-block;
        text-align: left;
        min-width: none;
        padding: 0;
        margin: 0;
    }
    #sign-up {
        float: right;
        margin-right: 1rem;
    }
    .headerflex {
        width: 95%;
        margin: 0 auto;
    }
    .main-nav {
        line-height: 1.1rem;
        min-width: 35ch;
    }
    .main-nav li {
        display: inline-block;
        list-style: none;        
    }
    .main-nav a {
        float: right;
        font-family: 'Montserrat', sans-serif;
        font-weight: 500;
        color: ghostwhite;
        text-decoration: none;
        font-size: .9rem;
        letter-spacing: 1px;
        padding-right: .3rem;
    }
    .sign-up a {
        font-family: 'Roboto';
        font-weight: 400;
        font-size: .7rem;
        color: ghostwhite;
        text-decoration: none;
        text-transform: none;
        padding: .3rem .5rem;
        text-align: center;
        background: rgb(255, 0, 0);
        border-radius: 30px;
    
    }
}
/****************************
     Media Screen 1024
*****************************/

@media screen and (min-width: 1024px){
    .header {
        background: url("../images/coding/Kidsoncomputers.jpg"), rgba(196, 196, 196, 0.3);
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-blend-mode: multiply;
        width: 100%;
        height: 600px;
        margin-top: 0;
        padding-top: 0;
        z-index: 100;
    }
    .headerctr {
        width: 95%;
        margin: 0 auto;
    }
    .headerflex {
        display: flex;
        flex-wrap: nowrap;
        width: 100%;
        padding: 1.5rem 0;
        gap: .5rem;
        margin: 0 auto;
    }
    .headerflex  > *:nth-child(1) {
        flex-basis: 1 1 40%;
        min-width: 420px;
    }
    .headerflex  > *:nth-child(2) {
        flex-basis: 1 1 60%;
        min-width: none;
        text-align: left;
    }
    .logo {
        display: inline-block;
    }
    .title-wrap {
        display: inline-block;
        min-width: 270px;
        max-width: 200px;
        padding-top: .6rem;
        margin-left: .2rem;
        line-height: 1.3rem;
        text-align: left;
    }
    .main-nav {
        display: inline-block;
        padding-left: 0;
        min-width: 500px;
        padding-top: 2.5rem;
    }
    #sign-up {
        padding-top: 1rem;
        padding-left: 1.5rem;
    }
    .logo img {
        width: 125px;
        height: auto;
    }
       
    .title-wrap a {
        font-size: 1.375rem;
    }
    .title-wrap p {
        font-size: 1rem;
        max-width: 30ch;
    }
    .main-nav a {
        float: right;
        font-family: 'Montserrat', sans-serif;
        font-weight: 700;
        color: ghostwhite;
        text-decoration: none;
        font-size: 1rem;
        padding-left: 0.5rem;
        letter-spacing: 1px;
    }
    .sign-up a {
        font-family: 'Roboto';
        font-weight: 600;
        font-size: .9rem;
        color: ghostwhite;
        text-decoration: none;
        text-transform: none;
        text-align: center;
        background: rgb(255, 0, 0);
        border-radius: 50px;
    }
    .class-container iframe {
        width: 100%;
        height: 300px;
        min-width: 300px;
        max-width: 512px;
        margin: 1.5rem 0 0 0;
    }
    footer {
        position: relative;
        display: block;
        height: 200px;
        margin-top: 4rem;
        bottom: 0;
        width: 100%;
        background-color: #191919;
        margin-bottom: 0;
        padding-bottom: 0;
    }
    .footer {
        font-family: 'Roboto';
        font-weight: 400;
        color: #d3d3d3;
        text-align: center;
        line-height: 1.5rem;
        letter-spacing: 1px;
        padding-bottom: .5rem;
        margin-top: 2rem;
    
    }


}

@media screen and (min-width: 1126px){
    
    .headerctr {
        width: 85%;
        margin: 0 auto;
    }
    .headerflex {
        display: flex;
        flex-wrap: nowrap;
        width: 100%;
        padding: 1.5rem 0;
        gap: .5rem;
        margin: 0 auto;
    }
    
    #sign-up {
        margin-top: 2rem;
    }
}
      
        



@media screen and (min-width: 1400px){
    .mobile-navbar {
        display: none;
    }
   
    h1 {
        font-family: 'Roboto';
        font-size: 4rem;
        font-weight: 900;
        letter-spacing: 1.5px;
        line-height: 1em;
        text-align: center;    
    }
    h2 {
        font-family: 'Roboto';
        font-size: 2rem;
        font-weight: 700;
        letter-spacing: 1px;
    }
    h3 {
        font-size: 1.2rem;
        font-weight: 600;
    }
    .header {
        background: url("../images/coding/Kidsoncomputers.jpg"), rgba(196, 196, 196, 0.3);
        background-size: cover;
        background-position:center;
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-blend-mode: multiply;
        width: 100%;
        height: 750px;
        margin-top: 0;
        padding-top: 0;
        z-index: 100;
    }
    .headerctr {
        width: 70%;
        margin: 0 auto;
    }
    .headerflex {
        display: flex;
        flex-wrap: nowrap;
        width: 100%;
        padding: 1.5rem 0;
        gap: 0rem;
        margin: 0 auto;
    }
    .headerflex  > *:nth-child(1) {
        flex-basis: 1 1 40%;
        min-width: none;
        max-width: none;
    }
    .headerflex  > *:nth-child(2) {
        flex-basis: 1 1 60%;
        min-width: none;
        max-width: none;
        text-align: left;
    }
    .headerflexwrapper {
        display: flex;
    }
    .logo {
        display: inline-block;
    }
    .title-wrap {
        display: inline-block;
        vertical-align: middle;
        min-width: none;
        max-width: none;
        padding-top: 1.5rem;
        margin-left: 1rem;
        line-height: 1.6rem;
    }
    .main-nav {
        float: right;
        min-width: 560px;
    }
    #sign-up {
        float: right;
        min-width: 122px;
        padding: 3rem 0 0 0;
        margin: 0rem;
    }
    .sign-up a {
        font-family: 'Roboto';
        font-weight: 600;
        font-size: .9rem;
        color: ghostwhite;
        text-decoration: none;
        text-transform: uppercase;
        background: rgb(255, 0, 0);
        border-radius: 50px;
        padding: .7rem 1rem;
    }

    .logo img {
        float: right;
        width: 150px;
        height: auto;
    }
    .title-wrap a {
        font-family: 'Montserrat', sans-serif;
        font-weight: 700;
        font-size: 1.6rem;
        vertical-align: text-bottom;
        text-align: left;
        padding-top: 6rem;
        letter-spacing: 0px;
        padding-bottom: 0;
        margin-bottom: 0;
        
    }
    .title-wrap p {
        font-weight: 400;
        text-align: left;
        max-width: none;
        padding-top: .5rem;
        margin-top: 0;
        font-size: .9rem;
    }
    .main-nav {
        text-align: left;
        padding-top: 2.5rem;
        padding-right: 1.5rem;
    }
    .main-nav li {
        display: inline-block;
        list-style: none;        
    }
    .main-nav a {
        font-family: 'Montserrat', sans-serif;
        font-weight: 500;
        color: ghostwhite;
        text-decoration: none;
        font-size: 1rem;
        line-height: 1.3rem;
        letter-spacing: 1.1px;
        padding-left: .9rem;
    }
    .title {
        display: block;
        width: 100%;
        color: ghostwhite;
        text-align: center;
        padding-top: 10rem;
        margin: 0 auto;
    }
    #semester {
        border-radius: 20px 0 0 20px;
    }
    #all {
        border-radius: 0 20px 20px 0;
    }

    
  
    
    .icons img {
        width: auto;
        height: 100px;
        margin: 0.5rem;
        border-radius: 20px;
    }
    
    
    
    
    /***********************************
       Intro Article
    ***********************************/

    .intro {
        width: 50%;
        margin: 0 auto;
    }  
    .intro img {
        width: 350px;
        height: auto;
        margin-top: 4rem;
        border-radius: 50px 0 50px 0;
        box-shadow: 4px 4px 8px #535353;
    }  
   
    
    .introflex {
        gap: 2.5rem;
        position: relative;
        margin-top: 5rem;
        margin-bottom: 3rem;
    }

    
    .class-container {
        width: 70%;
        margin: 0 auto;
    }
    .logo-container img{
        margin: 0 auto;
    }
    .class-container img {
        margin-top: 2rem;
    }
    .class-logo {
        text-align: center;
    }
  
    #iframe {
        width: 500px;
        height: 280px;
        margin: 0 auto;
    }
    .class-container iframe {
        width: 100%;
        height: 100%;
        max-width: none;
        margin: 0 auto;
    }
    footer {
        position: relative;
        display: block;
        height: 200px;
        margin-top: 4rem;
        bottom: 0;
        width: 100%;
        background-color: #191919;
        margin-bottom: 0;
        padding-bottom: 0;
    }
    .footer {
        font-family: 'Roboto';
        font-weight: 400;
        color: #d3d3d3;
        text-align: center;
        line-height: 1.5rem;
        letter-spacing: 1px;
        padding-bottom: .5rem;
        margin-top: 2rem;
    
    }





}

/**********************************
        Borders
***********************************/
/*
.header {
    border: 5px dotted greenyellow;
}
.headerflex {
    border: 2px solid blue;
}
.headerflexwrapper {
    border: 2px dotted purple;
}

.logo, .title-wrap, .sign-up {
    border: 1px dashed yellow;
}
.tile {
    border: 5px dotted yellow;
}
img {
    border: 5px dotted tomato;
}

.intro {
    border: 5px dotted tomato;
}
.classtoggle {
    border: 5px dotted tomato;
}
.class-container {
    border: 5px dotted tomato;
}
.sign-up {
    border: 1px dotted skyblue;

}
.logo-container {
    border: 2px dotted tomato;
}
.class-description {
    border: 2px dotted tomato;
}
*/