/* applies to everything */
* {
  margin: 0;
  padding: 0;
}

body{
  color: black;
  font-family: Verdana, sans-serif;
}
h1, h2, h3, h4 {
  color: #00b2ca;
  margin-bottom: 6px;
}
h1 {
  font-family: 'Lato', sans-serif;
}

.header {
  min-height: 100vh;
  width: 100%;
  background-image: linear-gradient(rgba(4,9,30,0.7),rgba(4,9,30,0.7)),
  url(images/banner.jpg);
  background-size:cover;
  background-position: center;
}

.header .logo {
  color: orange;
  font-size: 30px;
  padding: 12px;
}

.text-box {
  width: 100%;
  color: white;
  position: absolute;
  top: 50%;
  bottom: 50%;
  text-align: center;
}
.text-box h1{
  font-size: 60px;
}
.text-box p{
  margin: 10px 0 40px;
  font-size: 20px;
  color: white;
}

/*navigation bar's unerline hover effect */
.navigation{
  text-align: right;
}
.navigation ul li {
  list-style-type: none;
  display: inline-block;
  padding: 12px 12px;
  position: relative;
}
.navigation ul li:after{
  content: '';
  width: 0%;
  height: 2px;
  background-color: #00b2ca;
  display: block;
  margin: auto;
}
.navigation ul li:hover:after{
  width: 100%;
}
.navigation a:link, a:visited{
  color: white;
  text-decoration: none;
}
/* end of navigation bar's unerline hover effect */

.intro {
  width: 80%;
  margin: auto;
  text-align: left;
  padding-top: 80px;
}
.intro a:link, a:visited {
  text-decoration: none;
}

.container{
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
iframe{
  width: 80%;
  height: 500px;
}

/* footer information, columns style */
.footer{
  background-color: orange;
  padding-bottom: 20px;
}
.footer a:link, a:visited {
  color: white;
}
.footer:after{
  content: "";
  display: table;
  clear: both;
}
.column {
  float: left;
  width: 33%;
}
.column p{
  color: white;
  padding-left: 20px;
  padding-right: 20px;
  font-size: 14px;
  line-height: 22px;
}
.column h3 {
  color: #00b2ca;
  padding-left: 20px;
  padding-top: 25px;
}
/*end of footer css */

/* button tags */
.button {
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
}
.button0 {
  background-color: white;
  color: black;
  border: 2px solid #98C1D9;
}
.button0:hover {
  background-color: #98C1D9;
  color: white;
}

.button1 {
  background-color: white;
  color: black;
  border: 2px solid #00688B;
}
.button1:hover {
  background-color: #00688B;
  color: white;
}

.button2 {
  background-color: white;
  color: black;
  border: 2px solid #03A89E;
}
.button2:hover {
  background-color: #03A89E;
  color: white;
}
/* end of button tags */





/*FOR RESPONSIVE DESIGN */
@media screen and (max-width: 640px){
  .text-box h1{
    font-size: 40px;
  }
  .text-box p{
    font-size: 14px;
  }
  .navigation {
    text-align: center;
    background-color: #f79256;
  }
  .header {
    text-align: center;
  }
  .footer {
    text-align: center;
  }
  .navigation ul li {
    padding: 5px 15px;
  }
  .column {
    width: 100%;
  }
}