html{
  height: 100%;
}

body {
  color: #40514e;
  margin: 0;
  text-align: center;
  font-family: "Merriweather", serif;
  height: 100%;
}

table {
  border-collapse: collapse;
}

h1 {
  color: #66bfbf;
  font-size: 5.625rem;
  margin: 50px auto 0 auto;
  font-family: "Sacramento", cursive;
}

h2 {
  color: #66bfbf;
  font-family: "Verdana", sans-serif;
  font-size: 2.5rem;
  font-weight: normal;
  padding-bottom: 10px;
}

h3 {
  color: #11999e;
  font-family: "Montserrat", sans-serif;
}

p {
  line-height: 2;
}

hr {
  border: dotted #eaf6f6 6px;
  border-bottom: none;
  width: 4%;
  margin: 80px auto;
}

a {
  color: #11999e;
  font-family: "Montserrat", sans-serif;
  margin: 10px 20px;
  text-decoration: none;
}

a:hover {
  color: #eaf6f6;
}

a#hyperlink:hover {
  color: orange;
}

.top-container {
  background-color: #e4f9f5;
  position: relative;
  padding-top: 10px;
  padding-bottom: 10px;
}

.middle-container {
  margin: 100px 0;
  padding-bottom: 150px;

}

.skill-row {
  width: 50%;
  margin: 100px auto 100px auto;
  text-align: left;
}

.pro {
  text-decoration: underline;
}

.profile-pic {
  width: 20%;
  margin: 0px auto;
}

.intro {
  width: 30%;
  margin: auto;
}

/* set image position and size*/
.left-img {
  float: left;
  margin-right: 30px;
  width: 250px;
}

/* set image position and size*/
.right-img {
  float: right;
  margin-left: 30px;
  width: 250px;
}

/* add border to table */
table#coronavirus-table, #coronavirus-table tr, #coronavirus-table td, #coronavirus-table th{
  border: 1px solid black;
}

/* set the height of resume image */
.resume-img {
  height: 150px;
}

/* button css styling */
 .btn {
  background: #11cdd4;
  background-image: -webkit-linear-gradient(top, #11cdd4, #11999e);
  background-image: -moz-linear-gradient(top, #11cdd4, #11999e);
  background-image: -ms-linear-gradient(top, #11cdd4, #11999e);
  background-image: -o-linear-gradient(top, #11cdd4, #11999e);
  background-image: linear-gradient(to bottom, #11cdd4, #11999e);
  -webkit-border-radius: 8;
  -moz-border-radius: 8;
  border-radius: 8px;
  font-family: "Montserrat", sans-serif;
  color: #ffffff;
  font-size: 20px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
  width: 180px;
  height: 50px;
}

/* mouse over button change effect */
.btn:hover {
  background: #30e3cb;
  background-image: -webkit-linear-gradient(top, #30e3cb, #2bc4ad);
  background-image: -moz-linear-gradient(top, #30e3cb, #2bc4ad);
  background-image: -ms-linear-gradient(top, #30e3cb, #2bc4ad);
  background-image: -o-linear-gradient(top, #30e3cb, #2bc4ad);
  background-image: linear-gradient(to bottom, #30e3cb, #2bc4ad);
  text-decoration: none;
}

#mainContainer {
 min-height: 100%
}

/* make content of the webpage to align to center */
#mainContent {
  margin-left: 10%;
  margin-right: 10%;
  text-align: justify;
  overflow: auto;
  padding-bottom: 150px;
}

/* navigation menu styling */
nav {
  background-color: #66bfbf;
  padding: 15px 0 5px;
  overflow: hidden;
}

/* navigation bar to show at right side */
nav ul {
  list-style-type: none;
  float: right; 
  margin-top: 10px;
  margin-right: 20px;
}

/*display the list of menu side by side*/
nav ul li{
  display: inline-block;
  margin-right: -30px;
}

ul li, ol li{
  margin-bottom: 20px;
}

ul li a {
  padding: 100px 20px; 
}

/* set font color of menu bar*/
.menu-link {
  color: black;
}

/* font color of the menu bar change accorrding to displaying webpage */
ul li a.menu-link.Selected {
  color: white;
}

/* mouse over the font color will change */
nav ul li a:hover {
  color: yellow;
}

/* positioned relative to its normal position, will always stay at bottom */
footer {
  position: relative;
  margin-top: -100px;
  height: 100px;
  background-color: #66bfbf;
  color: white;
  text-align: center;
  clear:both;
}

/* change style for text in footer*/
.copyright {
  color: #eaf6f6;
  font-size: 0.75rem;
  padding-top: 40px;
}