* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
}

.cta {
    min-height: 100vh;
    background:
    linear-gradient(rgba(16,42,38,.75),rgba(16,42,38,.85)),
    url('https://images.unsplash.com/photo-1501785888041-af3ef285b470?w=1600')
    center/cover no-repeat;

    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 8%;
    color: white;
    position: relative;
}

.back {
    position: absolute;
    top: 30px;
    left: 8%;
    color: #f9a826;
    text-decoration: none;
}

.cta-content {
    max-width: 800px;
}

.cta-content > p:first-child {
    color: #f9a826;
    letter-spacing: 4px;
    font-weight: bold;
    margin-bottom: 20px;
}

.cta h1 {
    font-size: 50px;
    margin-bottom: 20px;
}

.cta h3 {
    margin-bottom: 20px;
}

.cta-content > p:not(:first-child) {
    line-height: 1.9;
    color: #ddd;
    margin-bottom: 35px;
}

.btn {
    display: inline-block;
    background: #f9a826;
    color: #222;
    padding: 14px 25px;
    border-radius: 30px;
    text-decoration: none;
    margin: 8px;
    font-weight: bold;
}

.secondary {
    background: white;
}

.btn:hover {
    transform: translateY(-4px);
}

@media(max-width:768px) {
    .cta h1 {
        font-size: 34px;
    }
}