:root {
    --navbar-size: 106px;
}

html,
body {
    min-height: 100vh;
}

body {
    background-color: #1d1d1d;
    color: #dadada;
    text-shadow: 0px 0px 4px #000000;
}

a {
    color: #fafafa;
}

.full-screen {
    min-height: calc(100vh);
    width: 100vw;
    display: flex;
    flex: 1 0 auto; /* grow if needed, don't shrink below content */
    overflow-y: scroll;
    scroll-snap-type: y proximity;
    scroll-padding-top: calc(var(--navbar-size)) !important;
}
.full-screen .container {
    scroll-snap-align: start;
    margin-top: calc(var(--navbar-size) + 0.5rem) !important;
    margin-bottom: calc(var(--navbar-size) + 0.5rem) !important;
}

.full-screen img {
    max-width: 100%;
    max-height: calc(100vh - var(--navbar-size) - 48px - 48px);
    height: 100%;
}

.button-tabs {
    color: #fafafa;
    background: transparent;
    border: none;
    margin: 30px auto 0;
    display: block;
    font-size: 20px;
    outline: none;
    position: relative;
    transition: 0.3s;
    padding: 10px;
    font-weight: 500;
}
.button-tabs:before {
    content: "";
    border-bottom: 1px solid #dadada;
    padding: 0 10px;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 0;
    transition: 0.3s;
}
.button-tabs:hover:before {
    width: 100%;
    padding: 0;
}
.button-tabs:active {
    background: #1f1f1f;
    color: #dadada;
    transition: none;
}
.button-tabs.active:before {
    width: 100%;
    padding: 0;
}

#differences img {
    border-radius: 50%;
    background-color: #212529;
}

.round-img {
    border-radius: 50% !important;
    background-color: #212529;
}

.call-to-action {
    padding: 1rem 1.5rem;
    font-size: 2rem;
}

.navbar-nav .nav-link {
    font-size: 1.3rem;
    padding: 0rem 1.5rem !important;
}

.picture-btn {
    background-color: #212529;
}