styles.css

body {  
	background-image: url('images/sandias.png'); /*Photo by Paul Thompson*/
	background-attachment: fixed;  
	background-size: cover;
	background-color: #31465E;
	background-repeat: no-repeat;
	background-position: left;
	font-family: Arial;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    text-align: left;
	opacity: 1;    
}

.link {
	color: #498fd1;
}

.link:hover {
	color: deepskyblue;
}

.transparentBG {
	background-color: rgba(0, 25, 100, 0.5);
}

.content {
    background: rgba(0, 7, 30, 0.6);
	color: #FFFFFF;
    text-align: left;
    font-size: 20px;
    font-family: Arial;
    line-height: 1.5;
    min-height: 100vh;
    overflow: hidden;
    /*padding-bottom: 70px;*/
}

@media (max-width: 767px) {
    .content {
        padding-bottom: 40px;
    }
}

.responsive-margin {
    margin-left: 10px;
    margin-right: 10px;
    margin-top: 15px;
}

.navbar-brand {
    font-size: 1.2rem;
}

@media (max-width: 665px) {
    .navbar-brand {
        font-size: 1.1rem;
    }
}

@media (min-width: 768px) {
    .responsive-margin {
        margin-left: 100px;
        margin-right: 100px;
    }

}

@media (min-width: 992px) {
    .responsive-margin {
        margin-left: 125px;
        margin-right: 125px;
    }
    .responsive-padding {
        padding-left: 125px;
        padding-right: 125px;
    }

}

.buttonFormatting {
    text-align: right;
    margin-left: 25px;
    margin-right: 10px;
    font-size: 16px;
    line-height: 2.5;
}

.header {
    color: #fff;
    text-align: center;
    padding: 0.75rem 0rem 0.05rem;
    padding-top: 10;
    bottom: 0;
}

.header-color {
    background-color: rgba(0, 0, 25, 0.25);
}

.navbar .navbar-nav .nav-link {
	text-align: right;
	line-height: 1;
    font-size: 1.1em;
    font-family: Arial;
    padding: 0.5em 0.8em;
    transition: all 1s;
}

.collapsing {
    -webkit-transition: height .45s ease;
    -o-transition: height .45s ease;
    transition: height .45s ease;
}

.horizontal-line {
    height: .2em;
    background: linear-gradient(to top, #2b4f6e, #335b7f);
}

.navbar-toggler {
  border: none;
  float: right;
}

.navbar .navbar-nav .nav-link:hover {
  background-color: #FFFFFF;
  color: #000000;
}

.brand-margin {
    margin-left: 20px;
}


@media only screen and (min-width: 992px) {
  .hide-on-desktop {
    display: none;
 }

  .navbar {
    padding: 0;
  }

  .navbar .navbar-nav .nav-link {
    padding: 1em 0.7em;
  }

  .navbar .navbar-brand {
    padding: 0 0.8em;
  }

}

.btn-success {
    background-color: #43A047 !important;
    border-color: #48b04d;
    transition: all 0.5s;
}

.btn-success:hover {
    background-color: #4CAF50 !important;
    border-color: #429645;
}

.btn-danger {
    background-color: #cc0000 !important;
    transition: all 0.5s;
}

.btn-danger:hover {
    background-color: #ee0000 !important;
}

.btn-info {
	color: #FFFFFF;
	background-color: #6441a5 !important;
    transition: all 0.5s;
    border-color: #6441a5;
}

.btn-info:hover {
	color: #FFFFFF;
	background-color: #8c5ce6 !important;
	border-color: #6441a5;
}

.btn-primary {
    background-color: #325A80 !important;
    transition: all 0.5s;
    border-color: #34618c;
}

.btn-primary:hover {
    background-color: #3a6894 !important;
    border-color: #2e577d;
}
@media (min-width: 768px) {
    .video-margin {
        margin-left: 50px;
        margin-right: 50px;
    }
}

h1 {
    font-family: 'Arial';
    font-size: 48px;
}

h3 {
    font-family: 'Arial', sans-serif;
    font-size: 22px;
}

button, input[type="submit"] {
    color: #FFFFFF;
    background-color: #0082b5;
    border: 3px solid transparent;
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.25;
    padding: 0.375rem 0.75rem;
    text-align: center;
    transition: color 0.3s ease-in-out, background-color 0.3s ease-in-out, border-color 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    vertical-align: middle;
}

@media (max-width: 767px) {
    .navbar {
        position: fixed;
        bottom: 0;
        width: 100%;
        z-index: 1000;
    }

    .navbar-collapse {
        justify-content: center;
    }

    .navbar-toggler {
        position: absolute;
        top: 8px;
        right: 10px;
    }
}

.fade-to-black {
    position: relative;
    background: linear-gradient(to bottom, rgba(0, 25, 100, 0.5) 80%, rgba(0, 0, 0, 1) 100%);
    margin:0px;
    padding:0px;
}

.image-button-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-left: 1rem;
    float: right;
}

a {
    text-decoration: none;
}

a.link {
    text-decoration: none;
}

.hover-border-highlight:hover {
    border-color: #335b7f !important;
}

.icon-size {
    width: 16px;
}

.icon-adjust {
    transform: translate(2px, -2px);
}

.source-code-adjust {
    margin-top: 1.5rem;
    transform: translateX(-5px);
    margin-bottom: 2.8rem;
}

.executables-adjust {
    margin-top:1.5rem;
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 400px;
}

.button-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.video-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.video-container video {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}