main-style.css

/*! css reset */
*,
*:before,
*:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
}
h1 {
  margin-bottom: 0.8rem;
}
h2 {
  margin-bottom: 0.75rem;
}
h3 {
  margin-bottom: 0.6rem;
}
h4,
p {
  margin-bottom: 0.5rem;
}
h5 {
  margin-bottom: 0.4rem;
}
h6 {
  margin-bottom: 0.3rem;
}
ol {
  margin-left: 30px;
}
/* ! */

/*! main css */
/** body wrapper */
body {
  background-color: #babfffad;
  color: #302a2a;
  padding: 0 100px;
  overflow-x: hidden;
  min-height: calc(100vh - 60px);
}
@media screen and (max-width: 900px) {
  body {
    padding: 0 80px;
  }
}
@media screen and (max-width: 780px) {
  body {
    padding: 0 60px;
  }
}
@media screen and (max-width: 500px) {
  body {
    padding: 0 20px;
  }
}

/** all links */
a,
a:link,
a:hover,
a:active,
a:visited {
  text-decoration: none;
  color: #3b3bb9;
}
a:hover {
  text-decoration: underline;
}

/** nav bar */
nav * {
  margin: 0;
}
.nav-space {
  height: 60px;
}
nav {
  background-color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  color: #301f1f;
  height: 60px;
  padding: 20px 100px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-bottom: solid 2px #808080;
  z-index: 1;
}
@media screen and (max-width: 900px) {
  nav {
    padding: 20px 80px;
  }
}
@media screen and (max-width: 780px) {
  nav {
    padding: 20px 60px;
  }
}
@media screen and (max-width: 500px) {
  nav {
    padding: 20px;
  }
}
/* nav bar wrapper */
.nav-cntr {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
/* logo */
.logo > p a {
  color: #301f1f;
  font-weight: bold;
}
/* nav bar link to the list of all the projects on the home page */
.menu {
  font-weight: bold;
  color: #07ad4c;
  text-transform: uppercase;
  cursor: pointer;
}
.nav-links {
  list-style-type: none;
  position: absolute;
  top: 60px;
  right: -100%;
  padding: 10px;
  font-weight: 500;
  background-color: #fff;
  transition: right 300ms;
  min-height: 300px;
  width: 200px;
  text-align: center;
}
.nav-links-active {
  right: 0;
}
.nav-links > li {
  margin: 10px 0;
}
.nav-links > li > a {
  color: #301f1f;
  margin-bottom: 20px;
}
.nav-links > li.active-link > a {
  font-weight: bold;
}

/** header */
header {
  width: 100%;
  margin: 20px 0;
  text-align: center;
}
header img {
  border-radius: 10px;
  max-height: 300px;
  width: auto;
  margin-left: auto;
  margin-right: auto;
}
@media screen and (max-width: 700px) {
  header img {
    height: auto;
    width: 100%;
  }
}

/** main */
.description h2 {
  font-weight: normal;
}
main section {
  margin-bottom: 40px;
}
main section > div:not(:first-of-type) {
  margin-top: 20px;
}
footer {
  border-top: 2px solid #808080;
  padding: 20px;
  text-align: center;
}
/* ! */