html,
body {
  padding: 0;
  margin: 0;
  font-family: "Work Sans", sans-serif;
}
.container {
  width: 1140px;
  margin-left: auto;
  margin-right: auto;
}

#hero {
  background-image: linear-gradient(#0f3b7f99 100%, white 0%),
    url("../img/network.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  font-family: "Work Sans", sans-serif;
  padding-top: 30px;
  min-height: calc(100vh - 200px);
  padding-bottom: 50px;
  box-sizing: border-box;
}

.flex {
  display: flex;
}
.w-full {
  width: 100%;
}
.space-between {
  justify-content: space-between;
}
.item-center {
  align-items: center;
}
.sub-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 22px;
  color: #00acc4;
  margin-bottom: 10px;
}
.title {
  color: #fff;
  font-weight: 700;
  font-size: 44px;
  margin-top: 22px;
  margin-bottom: 22px;
}
.hero-content {
  color: #fff;
  font-size: 18px;
  line-height: 30px;
}
.certificate-title {
  color: #0f3b7f;
  font-weight: 700;
  font-size: 38px;
  letter-spacing: -0.36px;
  text-align: center;
}

#certificate {
  padding-top: 60px;
}
.logo {
  height: 58px;
}
a.link-logo {
  display: flex;
  align-items: center;
  column-gap: 20px;
  color: white;
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  font-family: "Work Sans", sans-serif;
  padding-top: 20px;
  padding-bottom: 20px;
}
.link-logo {
  font-size: 24px;
}
.download-company {
  color: #fff;
  text-decoration: none;
  border: 1px solid #fff;
  display: flex;
  column-gap: 10px;
  align-items: center;
  padding: 10px 20px;
  border-radius: 8px;
}

.icon-download {
  display: inline-block;
}
.icon-download img {
  width: 28px;
}
.certificate {
  width: 100%;
}
.certificate img {
  width: 100%;
}
/* navbar */
nav {
  background-color: #0f3b7f;
}
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar ul {
  display: flex;
  margin: 0;
  list-style: none;
  font-family: "Work Sans", sans-serif;
  transition: 0.2s;
}
.navbar ul li{
  position: relative;
}
.navbar ul li div{
  width: 100%;
  height: 2px;
  position: absolute;
  display: none;
  bottom: -18px;
  background-color: #00acc4;
}

.navbar ul li a {
  color: white;
  text-decoration: none;
  padding: 20px 30px;
  display: block;
  font-size: 18px;
  font-weight: 500;
}
.navbar ul li a:hover{
  color: #00acc4;
}
.navbar ul li a:hover + div{
  display: block;
}

#menu-nav,
label.menu-nav {
  display: none;
}

@media screen and (max-width: 768px) {
  .container {
    width: 680px;
  }
}

@media screen and (max-width: 576px) {
  .container {
    width: 100%;
    padding-left: 20px;
    padding-right: 20px;
    box-sizing: border-box;
  }
  .certificate-title {
    font-size: 26px;
  }
  .title {
    font-size: 32px;
  }
  .download-company span {
    font-size: 14px;
  }
  .download-company {
    padding: 6px 12px;
  }
  /* navbar */
  nav{
    position: relative;
  }
  .navbar {
    padding: 0;
    
  }
  .navbar ul {
    width: calc(100% - 100px);
    flex-direction: column;
    padding: 0;
    margin: 0;
    position: absolute;
    height: 100vh;
    top: 0;
    left: -120%;
    background-color: #00acc4;
  }
  .navbar ul li a{
    padding: 16px 20px;
    /* display: block; */
    width: 100%;
  }
  label.menu-nav {
    display: initial;
    width: 26px;
    height: 26px;
    cursor: pointer;
  
  }
  #menu-nav:checked ~ .menu-nav .hamberger{
    display: none;
  }
  #menu-nav:checked ~ .menu-nav .close{
    display: initial;
  }
  #menu-nav ~ .menu-nav .close{
    display: none;
  }
  label.menu-nav img{
    width: 100%;
    height: 100%;
  } 
  #menu-nav:checked ~ ul {
    left: 0px;
  }
  .navbar ul li a:hover{
    color: #0f0f0f;
  }
  .navbar ul li a:hover + div{
    display: none;
  }
  .hero-content {
    line-height: 28px;
  }
  a.link-logo {
    column-gap: 12px;
  }
}