@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400&display=swap');

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

body {
    font-family: 'Open Sans', sans-serif;
    background: #fff;
    color: #333;
    line-height: 1.6;
}

ul {
    list-style: none;
}

a {
  text-decoration: none;
}

/* Button */
.btn {
  cursor: pointer;
  display: inline-block;
  padding: 10px 30px;
  color: #fff;
  background-color: #28a745;
  border: none;
  border-radius: 5px;
}

.btn:hover {
  opacity: 0.9;
}


/* Header */
.hero {
  height: 30vh;
  position: relative;
  color: #fff;
}







.hero .content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  padding: 0 20px;
}

.hero .content h1 {
  font-size: 55px;
}

.hero .content p {
  font-size: 23px;
  max-width: 600px;
  margin: 20px 0 30px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
}

.hero * {
  z-index: 10;
}



/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #333;
  color: #fff;
  opacity: 0.8;
  width: 800px;
  height: 70px;
  position: fixed;
  top: 0px;
  padding: 0 30px;
  transition: 0.5s;
}

.navbar.top {
  background: transparent;
}

.navbar a {
  color: #fff;
  padding: 10px 20px;
  margin: 0 5px;
}

.navbar a:hover {
  border-bottom: #28a745 2px solid;
}

.navbar ul {
  display: flex;
}

.navbar .logo {
  font-weight: 400;
}

/* Footer */
.footer {
  background: #333;
  color: #fff;
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer a {
  color:#fff;
  margin: 10px;
}