/*! normalize */
html {
    font-family: sans-serif;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust:100%
}

body {
    margin:0
}

article, aside, details, figcaption, figure, footer, header, hgroup, main, menu, nav, section, summary {
    display:block
}

audio, canvas, progress, video {
    display: inline-block;
    vertical-align:baseline
}

audio:not([controls]) {
    display: none;
    height:0
}

[hidden], template {
    display:none
}

a {
    background-color:transparent
}

a:active, a:hover {
    outline:0
}

abbr[title] {
    border-bottom:1px dotted
}

b, strong {
    font-weight:bold
}

dfn {
    font-style:italic
}

h1 {
    font-size: 2em;
    margin:.67em 0
}

mark {
    background: #ff0;
    color:#000
}

small {
    font-size:80%
}

sub, sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align:baseline
}

sup {
    top:-0.5em
}

sub {
    bottom:-0.25em
}

img {
    border:0
}

svg:not(:root) {
    overflow:hidden
}

figure {
    margin:1em 40px
}

hr {
    box-sizing: content-box;
    height:0
}

pre {
    overflow:auto
}

code, kbd, pre, samp {
    font-family: monospace, monospace;
    font-size:1em
}

button, input, optgroup, select, textarea {
    color: inherit;
    font: inherit;
    margin:0
}

button {
    overflow:visible
}

button, select {
    text-transform: none
}

button, html input[type="button"], input[type="reset"] {
    -webkit-appearance: button;
    cursor:pointer
}

button[disabled], html input[disabled] {
    cursor:default
}

button::-moz-focus-inner, input::-moz-focus-inner {
    border: 0;
    padding:0
}

input {
    line-height: normal
}

input[type="checkbox"], input[type="radio"] {
    box-sizing: border-box;
    padding: 0
}

input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button {
    height: auto
}

input[type="search"] {
    -webkit-appearance: none
}

input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration {
    -webkit-appearance:none
}

fieldset {
    border: 1px solid #c0c0c0;
    margin: 0 2px;
    padding:.35em .625em .75em
}

legend {
    border: 0;
    padding:0
}

textarea {
    overflow:auto
}

optgroup {
    font-weight:bold
}

table {
    border-collapse: collapse;
    border-spacing:0
}

td, th {
    padding: 0
}


* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing:border-box
}

html {
    height:100%
}

body {
    margin: 0;
    min-height: 100%;
    background-color: #fff;
    font-family: Arial, sans-serif;
    font-size: 16px;
    line-height: 20px;
    color:#333
}

img {
    max-width: 100%;
    vertical-align: middle;
    display:inline-block
}




/* custom structure */

.j-nav {
    position: relative;
    background: #dddddd;
    z-index:1000;
    padding-top:8px;
}

.j-nav:before, .j-nav:after {
    content: " ";
    display: table;
    grid-column-start: 1;
    grid-row-start: 1;
    grid-column-end: 2;
    grid-row-end:2
}

.j-nav:after {
    clear:both
}

.j-nav-brand {
    position: relative;
    float: left;
    text-decoration: none;
    color:#333333
}

.j-nav-link {
    position: relative;
    display: inline-block;
    vertical-align: top;
    text-decoration: none;
    color: #222222;
    padding: 20px;
    text-align: left;
    margin-left: auto;
    margin-right:auto
}

.j-nav-link.j--current {
    color:#0082f3
}

.j-nav-menu {
    position: relative;
    float:right
}

.j-nav-overlay {
    position: absolute;
    overflow: hidden;
    display: none;
    top: 100%;
    left: 0;
    right: 0;
    width:100%
}

.j-nav-button {
    position: relative;
    float: right;
    padding: 18px;
    font-size: 24px;
    display: none;
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select:none
}

.j-nav-button:focus {
    outline:0
}

.j-nav-button.j--open {
    background-color: #C8C8C8;
    color: white
}






.j-container {
    margin-left: auto;
    margin-right: auto;
    max-width:940px
}

.j-container:before, .j-container:after {
    content: " ";
    display: table;
    grid-column-start: 1;
    grid-row-start: 1;
    grid-column-end: 2;
    grid-row-end:2
}

.j-container:after {
    clear:both
}

.j-container .j-row {
    margin-left: -10px;
    margin-right:-10px
}

.j-row:before, .j-row:after {
    content: " ";
    display: table;
    grid-column-start: 1;
    grid-row-start: 1;
    grid-column-end: 2;
    grid-row-end:2
}

.j-row:after {
    clear:both
}

/*.j-row .j-row {
    margin-left: 0;
    margin-right:0
}*/


.j-col {
    position: relative;
    float: left;
    width: 100%;
    min-height: 1px;
    padding-left: 10px;
    padding-right:10px
}

/*.j-col .j-col {
    padding-left: 0;
    padding-right:0
}*/

.j-col-1 {
    width:8.33333333%
}

.j-col-2 {
    width:16.66666667%
}

.j-col-3 {
    width:25%
}

.j-col-4 {
    width:33.33333333%
}

.j-col-5 {
    width:41.66666667%
}

.j-col-6 {
    width:50%
}

.j-col-7 {
    width:58.33333333%
}

.j-col-8 {
    width:66.66666667%
}

.j-col-9 {
    width:75%
}

.j-col-10 {
    width:83.33333333%
}

.j-col-11 {
    width:91.66666667%
}

.j-col-12 {
    width:100%
}







/* custom style */

.navigation-bar {
    background-color: #fff;
}
.navigation-link {
    -webkit-transition: all 300ms ease-in-out;
    transition: all 300ms ease-in-out;
    color: #4e4e55;
}

.navigation-link:hover {
    color: #2e9dff;
}


.brand-text {
    margin-top: 0px;
    margin-bottom: 0px;
    font-family: 'Open Sans', sans-serif;
    color: #44a8ff;
    font-size: 25px;
    line-height: 25px;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
}
.brand-text span.highlight{
    color: #4e4e55;
    font-weight: 600;
}

.brand-link {
    padding-top: 16px;
    padding-bottom: 16px;
}

.section {
    position: relative;
    padding: 80px 10px;
    background-color: #fff;
    text-align: center;
}

.section.accent {
    background-color: #192024;
}
.section-heading {
    margin-top: 0px;
    margin-bottom: 16px;
}

.section-heading.centered {
    color: #4e4e55;
    font-size: 30px;
    font-weight: 300;
    text-align: center;
    letter-spacing: 5px;
    text-transform: uppercase;
}

.section-heading.centered.white {
    color: #fff;
}

.section-subheading.center {
    color: #8e8e9c;
    font-size: 18px;
    font-weight: 300;
    text-align: center;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.section-subheading.center.off-white {
    padding-bottom: 0px;
    color: #e8e8e8;
}

.section-title-group {
    margin-bottom: 60px;
}

.white-box {
    padding: 15px;
    border: 1px solid #dcebf7;
    border-radius: 5px;
    background-color: #fff;
    text-align: center;
}

.white-box.transparent {
    border-style: none;
    background-color: transparent;
}

.white-text {
    margin-bottom: 20px;
    color: #fff;
}

.grid-image {
    display: block;
    width: 45%;
    margin: 20px auto;
    padding: 20px;
    border: 10px solid #fff;
    border-radius: 50%;
    background-color: #44a8ff;
    box-shadow: 0 0 0 1px #2e9dff;
}

.grid-image1 {
    display: block;
    width: 65%;
    margin: 10px auto;
    padding: 10px;
    border: 10px solid #fff;
    border-radius: 50%;
    background-color: #44a8ff;
    box-shadow: 0 0 0 1px #2e9dff;
}

.grid-image2 {
    display: block;
    width: 80%;
    align-items: center;
    margin: 10px auto;
    padding: 10px;
    border: 10px solid #fff;
    border-radius: 50%;
    background-color: #44a8ff;
    box-shadow: 0 0 0 1px #2e9dff;
    max-width: 280px;
}

.grid-image3 {
    display: block;
    align-items: center;
    margin: 10px auto;
    padding: 10px;
}


.logo-row {
  display: flex;
  align-items: center; 
  justify-content: center;
  gap: 30px; 
}

.logo-row img {
  max-width: 300px;
  height: auto;
}

@media (max-width: 768px) {
  .logo-row {
    flex-direction: column;
    align-items: center;
  }
}


.hero-section.centered {
    padding-top: 150px;
    padding-bottom: 150px;
    border-bottom: 4px solid #44a8ff;
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), to(rgb(220, 20, 60, 0.1))), url("img/09a.jpg");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.5), rgb(220, 20, 60, 0.1)), url("img/09a.jpg");
    background-position: 0% 0%, 50% 70%;
    background-size: auto, cover;
    text-align: center;
}

.hero-section.subsection{


    padding-top: 150px;
    padding-bottom: 150px;   
    border-top: 4px solid #44a8ff;
}

.hero-section.venue{
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), to(rgb(220, 20, 60, 0.1))), url("img/hero_durham.png");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.4), rgb(220, 20, 60, 0.1)), url("img/hero_durham.png");
    background-position: 0% 0%, 50% 75%;
}

.hero-section.register{
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), to(rgb(220, 20, 60, 0.1))), url("img/hero_math.png");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.5), rgb(220, 20, 60, 0.1)), url("img/hero_math.png");
    background-position: 0% 0%, 50% 75%;
}

.hero-section.programme{
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), rgb(220, 20, 60, 0.1)), url("img/hero_programme.png");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.4), rgb(220, 20, 60, 0.12)), url("img/hero_programme.png");
    background-position: 0% 0%, 50% 75%;
}

.hero-section.sponsor{
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), to(rgba(46, 157, 255, 0.22))), url("img/mcs.jpeg");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.5), rgba(46, 157, 255, 0.22)), url("img/mcs.jpeg");  
    background-position: 0% 0%, 50% 50%;
}

.hero-section.papers{
    background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(46, 157, 255, 0.5)), to(rgb(220, 20, 60, 0.1))), url("img/butterflies7.jpg");
    background-image: linear-gradient(180deg, rgba(46, 157, 255, 0.5), rgb(220, 20, 60, 0.1)), url("img/butterflies7.jpg");  
    background-position: 0% 0%, 50% 7%;
}

.hero-heading2 {
   /* margin-bottom: 80px; */
    /*margin-top: 1cqi;*/
    color: snow;
    font-size: 60px;
    line-height: 60px;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-top: 10%;
    margin-bottom: 10%;
}

.hero-heading {
    margin-bottom: 30px;
    color: #fff;
    font-size: 60px;
    line-height: 60px;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
}

.hero-subheading {
   
    color: snow; 
    font-size: 25px;
    line-height: 25px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: -14%;
    margin-bottom: 5%;
   
}

.hero-subheading2 {
    margin-top: 8%;
    margin-bottom: -12%;
    padding: 8px 12px; 
    color: snow;
    font-size: 25px;
    line-height: 25px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: 4px;
    background-color: rgb(30, 20, 60, 0.15);
    -webkit-transition: background-color 300ms ease;
    transition: background-color 300ms ease;  

}



.button, .tab-button {
    display: inline-block;
    margin-right: 10px;
    margin-left: 10px;
    padding: 12px 30px;
    border-radius: 4px;
    background-color: #44a8ff;
    -webkit-transition: background-color 300ms ease;
    transition: background-color 300ms ease;
    color: #fff;
    font-size: 16px;
    line-height: 21px;
    font-weight: 400;
    text-align: center;
    letter-spacing: 2px;
    text-decoration: none;
    text-transform: uppercase;
    /*margin-bottom: 40px;
    margin-top: 50px;*/
}

.button2 {
    display: inline-block;
    margin-right: 10px;
    margin-left: 10px;
    padding: 8px 12px;
    border-radius: 4px;
    background-color: #44a8ff;
    -webkit-transition: background-color 300ms ease;
    transition: background-color 300ms ease;
    color: #fff;
    font-size: 16px;
    line-height: 21px;
    font-weight: 400;
    text-align: center;
    letter-spacing: 2px;
    text-decoration: none;
    text-transform: uppercase;
}


.button:hover,  .tab-button:hover  {
    background-color: #2e9dff;
}

.hollow-button, .hollow-tab-button {
    display: inline-block;
    margin-right: 10px;
    margin-left: 10px;
    padding: 10px 30px;
    border: 1px solid #fff;
    border-radius: 4px;
    -webkit-transition: background-color 300ms ease, border 300ms ease, color 300ms ease;
    transition: background-color 300ms ease, border 300ms ease, color 300ms ease;
    color: #fff;
    line-height: 21px;
    font-weight: 400;
    letter-spacing: 2px;
    text-decoration: none;
    text-transform: uppercase;
}

.hollow-tab-button{
    color: #2e9dff;
}

.tab-button, .hollow-tab-button{
    max-width: 170px;
    margin-left:5px;
    margin-right:5px;
    padding-left:10px;
    padding-right:10px;
    letter-spacing: 1px; 
}

.hollow-button:hover, .hollow-tab-button:hover {
    border-color: #2e9dff;
    color: #2e9dff;
    background-color:#fff;
}

.hollow-button.all-caps, .hollow-tab-button.all-caps {
    text-transform: uppercase;
}

.shaded {
    padding-top: 15px;
    padding-bottom: 15px;
    background-color: #edeff2;
        text-align: center;
}

.footer {
    padding-top: 35px;
    padding-bottom: 35px;
}

.footer.center {
    border-top: 1px solid #dbdbdb;
    background-color: #383838;
    text-align: center;
}

.footer-text {
    margin-top: 5px;
    margin-bottom: 5px;
    color: #9e9e9e;
    font-size: 16px;
}
.footer-text h3{
    color:#9e9e9e;
}
.footer-link {
    display: block;
    margin-bottom: 6px;
    padding-bottom: 10px;
    border-bottom: 1px solid #d5d5e0;
    color: #668cad;
    font-size: 14px;
    font-weight: 300;
    text-decoration: none;
}

.footer-link:hover {
    color: rgba(0, 140, 255, 0.84);
}



/* flex size */
@media screen and (max-width: 991px) {
    .j-container {
        max-width:728px
    }
    .j-nav-menu-open{
        display: none;
    }
    
    .navigation-link {
        /*color: hsla(0, 0%, 100%, 0.52);*/
        collor : #3b99d9;
    }

    .navigation-link.w--current {
        color: #44a8ff;
    }

    .hamburger-button.w--open {
        background-color: #3b99d9;
    }

    .navigation-menu {
        background-color: #fff;
    }
    
    .hero-section.centered {
        padding-top: 144px;
        padding-bottom: 144px;
    }
}
@media screen and (max-width: 767px) {
    .j-row, .j-container .j-row {
        margin-left: 0;
        margin-right:0
    }
    
    .j-col {
        width: 100%;
        left: auto;
        right:auto
    }
    
    .j-nav-brand {
        padding-left:10px
    }
    .j-nav-menu-open{
        display: none;
    }

    .j-nav-link {
        padding: 20px 10px;

    }
    .hero-section.centered {
        padding-top: 119px;
        padding-bottom: 119px;
    }

    .hero-heading {
        margin-bottom: 15px;
        font-size: 50px;
    }

    .hero-subheading {
        font-size: 18px;
    }

    .hero-subheading2 {
        font-size: 18px;
    }

    .spc {
        margin-bottom: 30px;
    }
}

@media screen and (max-width: 479px) {
    .j-container {
        max-width:none
    }
    
    .j-col {
        width:100%
    }
    .hero-section.centered {
        padding-top: 60px;
        padding-bottom: 60px;
    }

}






/* end css */

body {
    background-color: #edeff2;
    font-family: 'Open Sans', sans-serif;
    color: #4b6880;
    font-size: 16px;
    line-height: 20px;
}

h1 {
    margin-top: 0px;
    margin-bottom: 10px;
    font-size: 38px;
    line-height: 44px;
    font-weight: 700;
}

h2 {
    margin-top: 0px;
    margin-bottom: 10px;
    color: #4e4e55;
    font-size: 32px;
    line-height: 36px;
    font-weight: 300;
    text-align: center;
}

h2a {
    margin-top: 0px;
    margin-bottom: 0px;
    color: #4e4e55;
    font-size: 24px;
    line-height: 36px;
    font-weight: 300;
    text-align: center;
}

h3 {
    margin-top: 0px;
    margin-bottom: 0px;
    color: #4e4e55;
    font-size: 20px;
    line-height: 30px;
    font-weight: 300;
    letter-spacing: 7px;
    text-transform: uppercase;
}

h3 a, h4 a, h5 a, h6 a{
    text-decoration:none;
    color: inherit;
}

h4 {
    color: #4e4e55;
    margin-top: 0px;
    margin-bottom: 10px;
    font-size: 18px;
    line-height: 24px;
    font-weight: 700;
}

h5 {
    margin-top: 5px;
    margin-bottom: 5px;
    color: #4e4e55;
    font-size: 18px;
    line-height: 20px;
    font-weight: 300;
    letter-spacing: 1px;
    text-transform: uppercase;
}

h5a {
    margin-top: 5px;
    margin-bottom: 5px;
    color: #4e4e55;
    font-size: 24px;
    line-height: 20px;
    font-weight: 300;
    letter-spacing: 1px;
    text-transform: uppercase;
}

h6 {
    margin-top: 0px;
    margin-bottom: 10px;
    font-size: 12px;
    line-height: 18px;
    font-weight: 700;
}

p, li {
    margin-top: 10px;
    margin-bottom: 10px;
    font-size: 18px;
    line-height: 25px;
    font-weight: 300;
}