* {
  margin: 0;
}

a {
  color: #00df9a;
}

body {
  background-color: #000;
  color: #fff;
  font-family: 'Nunito', sans-serif;
  margin: 0 160px;
}

header {
  margin: 20px 0;
  text-align: center;
}

nav {
  margin: 20px 0 30px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

th, td {
  border: 1px solid #00df9a;
}

li {
  margin-bottom: 8px;
}

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

nav > a {
  margin: 0 30px;
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  padding: 7px 20px;
  border-radius: 4px;
  font-weight: 600;

}

nav > a:hover {
  color: #aaa;
}

.menu-active {
  background-color: #00df9a;
  color: #050505 !important;
}

.title-container {
  display: flex;
  justify-content: center;
  margin: 0 0 50px 0;
  text-align: center;
}

.title {
  max-width: 480px;
}

.mv-20 {
  margin: 20px 0;
}

.mv-40 {
  margin: 40px 0;
}

.mb-10 {
  margin-bottom: 10px;
}

.mb-50 {
  margin-bottom: 50px;
}

.author {
  font-size: 12px;
}

.sublist > li {
  margin: 0;
}

.text-center {
  text-align: center;
}

.text-justify {
  text-align: justify;
}

.bg-aqua {
  background-color: #00df9a;
}

@media only screen and (max-width: 768px) {
  body {
  margin: 0 20px;
}
  nav {
    flex-direction: column;
  }
}

.download-btn {
  background-color: #FF781F;
  border: 0;
  border-radius: 20px;
  min-width: 200px;
  min-height: 40px;
  font-weight: bold;
  cursor: pointer;
}

.download-link {
  color: #fff;
}

.download-btn:hover {
  background-color: #48bf53;
}