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

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.4;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: #fff;
}

.btn {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  font-size: 1.2rem;
  border-radius: 5px;
}

.btn-primary {
  background: #0391dd;
  color: white;
}

.btn-primary:hover {
  background: rgba(3, 7, 28);
}

.btn-block {
   display: inline-block;
}

#navbar {
    padding: 1rem;
    background: #0391dd;
    color: #fff;
}

#navbar nav ul li{
    margin: 0 1rem;
}

#navbar nav ul li a {
    padding: 0.5rem 0.75rem;
    font-weight: bold;
}

#navbar nav ul li a:hover {
    background: rgba(3, 7, 28);
    color: #fff;
    border-radius: 5px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar nav ul {
    display: flex;
}

.showcase {
    background: url('https://images.unsplash.com/photo-1542435503-956c469947f6?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=2000&q=200') no-repeat center center/cover;
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
} 

.showcase::before {
    content: "";
    position:absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 7, 28, 0.7);
}


.showcase * {
    z-index: 100;
}

h1.hero-heading {
    font-size: 3.5rem;
}

p.lead-text {
  margin: 0 0 1.5rem 0;
  font-size: 1.5rem;
}

#showcase-content {
    color: #fff;
    height: 90vh;
    width: 100%;
}