* {
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #333;
  color: #ffffff;
  height: 100vh;
  line-height: 1.6;
  overflow: hidden;
}

.container {
  width: 100%;
  height: 100%;
  /* CSS Smooth Scroll */
  overflow-y: scroll; 
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

.lead {
  font-size: 1.5rem;
  text-shadow:  1px 0 black;
}

.navbar {
  position: fixed;
  top: 0;
  z-index: 1;
  display: flex;
  width: 100%;
  height: 60px;
  background: rgba(0,0,0,0.7);
}

.navbar ul {
  display: flex;
  list-style: none;
  width: 100%;
  justify-content: center;
}

.navbar ul li {
  margin: 0 1rem;
  padding: 1rem;
}

.navbar ul li a {
  text-decoration: none;
  text-transform: uppercase;
  color: #f4f4f4;
}

.navbar ul li a:hover {
  color: skyblue;
}

section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  height: 100vh;
 
  /* Scroll Snap */
  scroll-snap-align: center;
}

section h1 {
  font-size: 4rem;
}

/* Section Images */
section#home {
  background: url('https://source.unsplash.com/TEJvYSiByi4/1600x900') no-repeat center center/cover;;
}

section#about {
  background: url('https://source.unsplash.com/k9NVUS7PS4A/1600x900') no-repeat center center/cover;;
}

section#service {
  background: url('https://source.unsplash.com/x7gz40Z9ObM/1600x900') no-repeat center center/cover;;
}

section#contact {
  background: url('https://source.unsplash.com/QcMDX7ucPzs/1600x900') no-repeat center center/cover;;
}

.navbar .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .navbar ul li {
   margin: 0;
   padding: 0;
  }

  .navbar li a {
    display: none;
}
  .navbar li a.icon {
    display: block;
    float: left;
  }
}

@media screen and (max-width: 600px) {
  .navbar.responsive li a {display: block;}
  .navbar.responsive ul {
    display: inline-block;
    text-align: left;
  }
  .navbar.responsive{
    height: 300px;
  }
}