* {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Raleway', sans-serif;
  line-height: 1.5;
}

.container {
  margin: auto;
  width: 80%;
}

nav {
  background-color: #1f2937;
  padding: 20px 0;
  color: #f9faf8;
}

nav > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header {
  font-size: 24px;
}

li {
  display: inline;
  margin: 0 20px;
  padding-bottom: 4px;
}

li:hover {
  border-bottom: 3px solid #e5e7eb;
}

nav a {
  text-decoration: none;
  font-size: 18px;
  color: #e5e7eb;
}

.section-1 {
  color: #f9faf8;
  background-color: #1f2937;
}

h1 {
  font-size: 48px;
  font-weight: bolder;
}

.section-1 .cols {
  padding: 50px 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-column-gap: 2rem;
}

.btn-1 {
  background-color: #3882f6;
  border: none;
  border-radius: 5px;
  padding: 8px 20px;
  margin: 10px 0;
  color: #f9faf8;
  font-weight: 700;
}

.btn-1:hover {
  opacity: 80%;
}

.cols-img img {
  width: 100%;
}

.section-2 {
  width: 70%;
  margin: auto;
  padding: 20px;
  text-align: center;
}

.section-2 > h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

.illustrations {
  display: grid;
  grid-column-gap: 2em;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 50px;
}

.illustrations > div > img {
  margin-top: 20px;
  height: 200px;
  width: 100%;
}

.section-3 {
  background-color: #e5e7eb;
  text-align: center;
  padding: 60px;
}

.sec-3 {
  margin: auto;
  width: 60%;
}

.sec-3 p {
  font-size: 36px;
  font-style: italic;
  color: #1f2937;
}

.sec-3 h4 {
  float: right;
}

.sec-3 small {
  font-weight: bold;
  font-size: 16px;
  float: right;
  padding-right: 30px;
}

.sec-4 {
  display: grid;
  align-items: center;
  grid-template-columns: 80% 20%;
  background-color: #3882f6;
  margin: 50px 0;
  padding: 30px;
  color: #f9faf8;
  padding-left: 80px;
  border-radius: 10px;
}

.sec-4 button {
  padding: 7px 20px;
  color: #f9faf8;
  background-color: #3882f6;
  border: 2px solid #e5e7eb;
  border-radius: 4px;
}

.sec-4 button:hover {
  background-color: #f9faf8;
  color: #3882f6;
}

footer {
  background-color: #1f2937;
  padding: 30px;
  text-align: center;
  color: #f9faf8;
}

#small-device {
  display: none;
}

@media (max-width: 768px) {
  .large-view-display {
    display: none;
  }

  body {
    background-color: #333;
  }

  #small-device {
    display: block;
    top: 30%;
    margin: auto;
    text-align: center;
    width: 70%;
    color: #ccc;
    margin-top: 30%;
  }

  #small-device i {
    font-size: 90px;
  }

  #small-device p {
    font-size: 20px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin: 30px 0;
  }

  #learn-more {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  #small-device a i {
    font-size: 18px;
  }

  a {
    color: #909090;
  }
}