* {
  margin: 0;
  padding: 0;
  outline: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

a {
  text-decoration: none;
}

body {
  font-size: 14pt;
  color: #777;
  margin: 0;
  padding: 0;
  background-position: center top;
  background-repeat: no-repeat;
  background-attachment: scroll;
  background-color: #1B82A2;
  background-image: url('../img/background.jpg');
}

#dotted-line {
  margin: 15px 0;
  border-top: 1px dashed #1B82A2;
}

#solid-line {
  margin: 15px 0;
  border-top: 1px solid #777;
}

#container {
  width: 940px;
  margin: 0 auto;
}

#banner {
  position: relative;
  height: 440px;
  overflow: hidden;
}

#banner img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

header {
  position: absolute;
  top: 40px;
  width: 100%;
  background-color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header div {
  margin-left: 50px;
  margin-top: 10px;
}

nav {
  margin-right: 50px;
  margin-top: 7px;
}

nav ul {
  display: flex;
}

nav ul li {
  font-family: 'Titillium', Helvetica, sans-serif;
  font-size: 12px;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  list-style: none;
  color: #72c4ce;
  margin: 0 17px;
  transition: 0.5s;
}

nav ul li {
  border-bottom: 4px solid transparent;
}

nav ul li:hover {
  border-bottom: 4px solid #1B82A2;
}

.actived {
  border-bottom: 4px solid #1B82A2;
}

nav ul li:hover {
  color: #1B82A2;
}

main {
  background-color: #fff;
  padding: 50px 80px 30px 80px;
}

section#section-products {
  display: flex;
}

section#section-products div {
  width: 33.3333%;
  padding: 0 25px;
}

section#section-products div p {
  font-size: 12px;
}

.card-header {
  cursor: pointer;
  margin-bottom: 0px !important;
}

#download,
.manual li {
  padding: 1px 10px;
  cursor: pointer;
  list-style-type: none;
  transition: 0.4s;
}

#download li:hover {
  background-color: #24B2D9;
  color: white;
}

.manual li:hover {

  background-color: #24B2D9;
  color: white;
}

.manual a {
  color: #777;
  text-decoration: none;
}

.manual>ul>li:hover {
  background-color: #24B2D9;
}