*, *:after, *:before {
  box-sizing: border-box;
}

html {
  display: block;
  position: relative;
  margin: 0;
  padding: 0;
  overflow: auto;
}

.body {
  display: block;
  position: relative;
  margin: 0;
  padding: 0;
  overflow: auto;
}

.main {
  display: block;
  position: relative;
  margin: 0;
  padding: 0;
  height: auto;
  overflow: hidden;
  width: 100%;
}

.logo {
  display: block;
  position: relative;
  margin: 100px 0 0 0;
  padding: 0;
  overflow: hidden;
  width: 100%;
  height: auto;
}

.logo_img {
  display: block;
  position: relative;
  margin: 0 auto;
  padding: 0;
  overflow: hidden;
  height: 100px;
}

.nav {
  display: flex;
  position: relative;
  margin: 50px auto 0 auto;
  padding: 0;
  width: 80%;
  height: auto;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  overflow: hidden;
}

.nav_a {
  display: inline-block;
  margin: 25px 50px;
  padding: 0 25px;
  overflow: hidden;
  width: 400px;
  height: 100px;
  background: #FFF;
  box-shadow: 0 1px 3px 1px rgba(0, 44, 234, 0.1);
  transition: .6s;
  text-decoration: none;
  border-radius: 5px;
}

.nav_text {
  display: block;
  position: relative;
  padding: 0;
  margin: 0;
  width: 100%;
  text-align: center;
  color: #1368a4;
  font-weight: 400;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 28px;
  font-family: "Lato";
  top: 50%;
  transform: translateY(-50%);
}

.nav_a-document {
  max-width: 500px;
}

.nav_text-document {
  display: inline-block;
  font-size: 18px;
  width: calc(100% - 90px);
  top: 50%;
  transform: translateY(-50%);
  vertical-align: top;
}

.nav_a:hover {
  background: rgba(19, 104, 164, 0.2);
}

.pdf {
  position: relative;
  display: inline-block;
  width: 80px;
  height: 100%;
  overflow: hidden;
}

.pdf_img {
  display: block;
  position: relative;
  margin: 0;
  padding: 0;
  width: 100%;
  height: auto;
  top: 50%;
  transform: translateY(-50%);
}

@media screen and (max-height: 700px) {
  .logo {
    margin: 20px 0 0 0;
  }
  .nav {
    margin: 15px auto 0 auto;
    width: 100%;
  }
  .nav_a {
    height: 80px;
    margin: 10px 0;
  }
  .nav_text {
    font-size: 22px;
  }
}

@media screen and (max-width: 1200px) {
  .nav_text-document {
    font-size: 14px;
    width: calc(100% - 50px);
  }
  .pdf {
    width: 40px;
  }
}