* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --white-1: #fff;
  --white-2: rgba(255, 255, 255, 0.9);
  --white-3: rgba(255, 255, 255, 0.7);
  --dark-white-1: #f6f6f6;

  --light-gray-1: #e6e3e3;
  --medium-gray-1: #777;
  --dark-gray-1: #373737;

  --light-blue-1: #d7fdfb;
  --medium-blue-1: #17046b;

  --light-purple-1: rgba(199, 199, 255, 0.5);

  --dark-blue-1: #000033;
  --dark-blue-2: rgba(0, 0, 51, 0.9);
  --dark-blue-3: rgba(0, 0, 51, 0.7);

  --olive-1: #524204;
  --olive-2: rgba(82, 66, 4, 0.7);
  --olive-3: rgba(82, 66, 4, 0.3);

  --blue-gradient: linear-gradient(
    to top right,
    var(--dark-blue-1),
    var(--dark-blue-1),
    var(--medium-blue-1)
  );

  --bright-green-1: #beff3c;
  --bright-aqua-1: #00ffdd;

  --shadow-1: 0 1.2rem 1.8rem rgba(0, 0, 0, 0.2);
  --shadow-2: 0 1.2rem 1.8rem rgba(0, 0, 0, 0.5);
}

body {
  position: relative;
  line-height: 1.7;
  font-family: "Roboto", sans-serif;
  font-weight: 400;
  background-color: var(--light-blue-1);
  color: var(--dark-gray-1);
}

.header-nav {
  font-family: monospace;
  display: flex;
  margin: 0 auto;
  background-position: center;
  background-size: cover;
  height: auto;
  justify-content: space-between;
  overflow: hidden;
  z-index: 1;
  background-color: var(--white-1);
  box-shadow: var(--shadow);
}

.header-nav a {
  margin: 1rem 0;
  padding: 1rem;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--dark-blue-1);
  float: left;
}

.header-nav a:first-child {
  margin-left: 4rem;
}

.header-nav a:last-child {
  margin-right: 4rem;
}

.header-nav a:hover,
.drop-down button:hover {
  border-radius: 9px;
  background-color: var(--dark-blue-1);
  color: var(--white-1);
}

.drop-down {
  font-family: monospace;
  float: left;
  overflow: hidden;
}

.drop-down button {
  border: 0;
  margin: 1rem 0;
  padding: 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: monospace;
  background-color: var(--white-1);
  color: var(--dark-blue-1);
}

.drop-down-links a:hover {
  background-color: var(--olive-1);
}

.drop-down-links {
  display: none;
  overflow: hidden;
  position: absolute;
  margin-top: -12px;
  z-index: 1;
  background-color: var(--dark-blue-1);
  color: var(--white-1);
  box-shadow: var(--shadow);
}

.drop-down-links a {
  display: block;
  float: none;
  text-align: left;
  text-decoration: none;
  color: var(--white-1);
  width: 100%;
}

.drop-down-links a:first-child {
  margin-left: 0;
}

.drop-down:hover .drop-down-links {
  display: block;
}

.drop-down-links a:hover {
  border-radius: 0;
}

/* page heading */
.page-heading {
  background-image: var(--blue-gradient);
  height: auto;
  text-align: center;
  box-shadow: var(--shadow);
}

.page-heading h2 {
  top: 0%;
  color: var(--white-1);
  letter-spacing: 0.7rem;
  padding: 2rem;
  font-size: 1.5rem;
}

/* hidden */
.hidden-nav {
  display: none;
}

.section-page {
  margin: 0 auto;
  width: 80%;
}

.page-content {
  margin: 4rem auto;
  padding: 2rem 0;
  background-color: var(--white-1);
  box-shadow: var(--shadow);
}

.page-title-heading {
  text-align: center;
  font-family: monospace;
  font-size: 3rem;
  font-weight: 300;
  letter-spacing: 0.7rem;
  color: var(--dark-gray-1);
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  padding: 2rem;
  height: auto;
  background-position: center;
  background-size: cover;
  background-image: var(--blue-gradient);
  text-align: center;
  font-size: 0.9rem;
}

.footer-copyright {
  padding-bottom: 0.7rem;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--medium-gray-1);
}

.footer-link:link,
.footer-link:visited {
  border-radius: 9px;
  padding: 0.4rem;
  text-decoration: none;
  font-family: monospace;
  font-weight: 700;
  color: var(--white-1);
}

.footer-link:active,
.footer-link:hover {
  background-color: var(--white-1);
  color: var(--olive-1);
  transition: all 0.7s;
}