* {
    box-sizing: border-box;
    margin: 0;
}
body {
    font-family: 'Lato', Arial, Helvetica, sans-serif;
    margin: 0;
}
.header {
    background: #182424;
    color: #fff;
    padding: 10px 20px;
    margin-bottom: 30px;
}
.footer {
    background: #182424;
    color: #fff;
    padding: 10px 20px;
    margin-top: 30px;
    text-align: center;
}
.footer a {
    color: #fff;
}
.container-slider {
    width: 100%;
    max-width: 900px;
    margin: auto;
    overflow: hidden;
    position: relative;
}
.slider {
    display: flex;
    height: 400px;
    width: 3000%;
    margin-left: -100%;
}
.slider-slide {
    width: 100%;
}
.slider-img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.slider-btn {
    position: absolute;
    width: 40px;
    height: 40px;
    background: rgba(220, 220, 220, .7);
    top: 50%;
    transform: translateY(-50%);
    font-size: 32px;
    font-weight: 600;
    font-family: monospace; 
    text-align: center;
    border-radius: 50%;
    cursor: pointer;
    visibility: hidden;
    opacity: 0;
    transition: visibility 0s, opacity 0.5s linear;
}
.container-slider:hover .slider-btn {
    visibility: visible;
    opacity: 1;
}
.slider-btn:hover {
    background: #dcdcdc;
}
.slider-btn-right {
    right: 15px;
}
.slider-btn-left {
    left: 15px;
}


h1 {
    text-align: center;
}

.flex-videos, .flex-contact {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.flex-contact {
    margin-top: 50px;
}

.flex-contact > a {
    margin: 15px;
    color: #182424;
    text-decoration: none;
    font-size: 20px;
}

.youtube-video {
    margin: 20px;
    margin-top: 50px;
    width: 600px;
    max-width: 100%;
    position: relative;
    height: 0;
    padding-bottom: 56.25%;
}
.youtube-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

@media (min-width: 600px) {
    .youtube-video {
        padding-bottom: 340px;
    }
}