:root {
    --customBlack: #231f20;
    --customDarkBlue: #23375f;
    --customCyan: #00ffff;
    --customRed: #ed1c2e;
    --customLightGrey: #f0f1f1;
    --customLightNavyBlue: #496183;
}

html, body {
    font-family: 'Noto Sans', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

.row {
    margin-right: 0;
    margin-left: 0;
}

/* Navigation Bar */
.navbar-nav > li > a {
    font-weight: 600;
}

.navbar-dark .navbar-nav .show > .nav-link,
.navbar-dark .navbar-nav .active > .nav-link,
.navbar-dark .navbar-nav .nav-link.show,
.navbar-dark .navbar-nav .nav-link.active {
    color: var(--customCyan);
}

/* Background Image */
.background-cont {
    height: 120vh;
}

.background-img {
    background-image: url('../../assets/background.jpg');
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* Introduction */
.subheadings {
    color: var(--customRed);
}

/* Organizer Info */
.organizer-info-row {
    background-color: var(--customLightNavyBlue);
    padding-top: 40px;
    padding-bottom: 40px;
    padding-left: 60px;
    padding-right: 60px;
}

/* Theme, Objective */
.theme-obj-row {
    background-color: var(--customDarkBlue);
}

.theme-obj-row img {
    width: 50%;
}

/* Tracks */
.tracks-row {
    background: var(--customLightGrey);
}

.track-col {
    background-color: var(--customDarkBlue);
}

.track-col-3, .track-col-7 {
    padding-top: 0.25rem !important;
    padding-bottom: 0.25rem !important;
}

.arrow-right {
    width: 0; 
    height: 0; 
    border-top: 16px solid transparent;
    border-bottom: 16px solid transparent;
    border-left: 16px solid var(--customDarkBlue);
}

/* Key Speakers */
.row-speakers-row {
    background-color: var(--customLightGrey);
}

.key-speakers-row img {
    width: 50%;
}

.key-speakers-title, .key-speakers-cont .speaker-name {
    color: var(--customDarkBlue);
}

/* Important Links */
.image-box {
    background: url('../../assets/links-background.jpg') center center;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-box .links-title {
    color: var(--customDarkBlue);
    border: 3px solid var(--customDarkBlue);
}

.arrow-up {
    width: 0; 
    height: 0; 
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;    
    border-bottom: 10px solid var(--customDarkBlue);
}  

.custom-btn {
    background-color: var(--customDarkBlue);
    border-radius: 0;
    padding-left: 35px;
    padding-right: 35px;
    color: white;
}

.custom-btn:hover {
    color: var(--customCyan);
}

.instructions, ol > li a {
    color: var(--customDarkBlue);
}

/* Footer */
.footer-row {
    background-color: var(--customDarkBlue);
}

/* Back To Top */
#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: rgba(219, 219, 219, 0.697);
    font-weight: bold;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 11px 15px;
    border-radius: 50%;
    font-size: 20px;
}

#scrollToTopBtn:hover {
    background-color: rgba(168, 167, 167, 0.897);
    color: rgb(41, 41, 41);
}

/* Media Queries */
@media only screen and (max-width: 798px) {
    .background-img {
        background-image: url('../../assets/background-mobile.jpg');
    }

    .introduction-desc, 
    .conference-info-cont, 
    .theme-obj-row 
    .theme-obj-desc {
        text-align: justify !important;
    }
    
    .organizer-info-row {
        padding-left: 5px;
        padding-right: 5px;
    }

    .tracks-row {
        font-size: 13px;
    }

    .track-col {
        padding-top: 1.5rem !important;
        padding-bottom: 1.5rem !important;
    }
}

@media (min-width: 1900px) {
    .organizer-info-row {
        padding-right: 10%;
        padding-left: 10%;
    }
}