/* CSS Variables */

:root {
  --accent: hsl(198, 73%, 48%);
  --primary-text: hsl(0, 1%, 78%);
  --primary-dark: hsl(225, 16%, 10%);
  --secondary-dark: hsl(225, 16%, 15%);
  --highlight: hsl(225, 16%, 25%);
}

/* Generic site-wide styles */

body {
  background-color: var(--primary-dark);
  color: var(--primary-text);
  font-family: "Montserrat", sans-serif;
  margin: 0;
  text-shadow: 1px 1px 1px var(--primary-dark);
}

h1 {
  font-size: 64px;
  margin: 150px 0 0 0;
  text-shadow: 2px 2px 2px var(--primary-dark);
}

h2 {
  font-size: 42px;
  margin: 20px 0 40px 0;
  text-shadow: 2px 2px 2px var(--primary-dark);
}

h3 {
  font-size: 36px;
  margin: 20px 0 40px 0;
  text-align: center;
}

h4 {
  font-size: 24px;
  margin: 20px 0;
}

h5 {
  font-size: 20px;
}

p,
li {
  font-size: 18px;
}

ul {
  list-style: none;
  padding: 0;
}

picture {
  margin: 0;
}

section {
  background-color: var(--secondary-dark);
  border: 1px solid hsl(0, 0%, 10%);
  border-radius: 18px;
  padding: 30px;
  margin: 40px auto;
  max-width: 90%;
}

main {
  padding: 20px 12px 0 12px;
}

footer {
  padding-bottom: 30px;
  text-align: center;
}

section:hover {
  background-color: var(--highlight);
  transition: all 750ms ease-in-out;
}

/* Hero */

header {
  background-image:
    linear-gradient(
      hsla(225, 16%, 10%),
      hsl(198, 73%, 48%, 0.45),
      hsl(198, 73%, 48%, 0),
      hsl(198, 73%, 48%, 0),
      hsla(225, 16%, 10%)
    ),
    url("assets/images/landing.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  color: hsl(0, 0%, 100%);
  padding: 30px 0 175px 50px;
  text-shadow: 1px 1px 1px var(--primary-dark);
  width: 100%;
}

header nav a,
.resume {
  border-radius: 6px;
  box-shadow: 2px 2px 3px hsl(0, 0%, 7%);
  color: hsl(0, 0%, 100%);
  font-size: 20px;
  letter-spacing: 2px;
  margin-right: 15px;
  padding: 10px 20px;
  text-decoration: none;
  text-transform: uppercase;
}

.resume {
  background-color: hsl(198, 71%, 38%);
  border: 1px solid var(--accent);
  font-weight: 500;
  padding: 15px 20px;
  text-align: center;
}

/* Navigation in header */

.navbar {
  color: hsl(0, 0%, 100%);
  justify-content: space-evenly;
}

.nav-link {
  border: 1px solid var(--accent);
  color: hsl(0, 0%, 100%);
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link.show {
  color: hsl(0, 0%, 100%);
}

.dropdown-menu {
  background: linear-gradient(
    hsla(225, 16%, 10%, 0.2),
    hsl(198, 73%, 48%, 0.9)
  );
  border: 1px solid var(--accent);
  box-shadow: 2px 2px 3px hsl(0, 0%, 7%);
}

.dropdown-item {
  border: none;
  box-shadow: none;
  color: hsl(0, 0%, 100%);
}

.nav-link:visited,
.dropdown-menu:visited {
  color: hsl(0, 0%, 100%);
}

.dropdown-item:hover {
  background: var(--accent);
  color: hsl(0, 0%, 100%);
}

.nav-link:hover,
.dropdown-menu:hover {
  color: hsl(0, 0%, 100%);
}

.nav-link:hover {
  background-color: var(--accent);
}

.nav-link:active,
.dropdown-menu:active {
  color: hsl(0, 0%, 100%);
}

/* Education & certifications */

.timeline {
  border-left: 2px solid hsl(198, 73%, 48%);
  margin-bottom: 40px;
  padding-left: 25px;
}

.education h4 {
  margin-bottom: 10px;
}

.education ul {
  margin: 0;
}

.education li {
  margin-left: 60px;
  padding: 5px 0 5px 0;
}

.certificates {
  margin-top: 30px;
}

.certificates li {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  margin-left: 0;
}

.ratings li {
  font-size: 18px;
  font-weight: 400;
  margin-left: 60px;
}

/* Flight experience */

.hours-in-flight,
.notable-experiences {
  background-color: hsl(225, 16%, 20%);
  border-radius: 8px;
  padding: 20px 0 30px 0;
  text-align: center;
}

.hours-in-flight {
  margin-bottom: 30px;
}

.hours-in-flight h4 {
  margin-bottom: 40px;
}

.hours-in-flight ul {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.hours-in-flight li {
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 15px;
}

.carousel h5 {
  font-size: 20px;
  margin: 0 auto;
  max-width: 90%;
  text-align: center;
}

.carousel p {
  margin: 10px auto 0 auto;
  max-width: 85%;
  text-align: center;
}

.carousel-inner {
  margin: 0 auto;
  padding: 20px;
  width: 80%;
}

.carousel-item {
  padding: 40px 0;
}

/* Aircraft */

.aircraft h4 {
  background-color: hsl(198, 73%, 29%);
  border-radius: 8px;
  padding: 20px;
  margin: 10px 0 20px 0;
  text-align: center;
}

.aircraft iframe {
  border: none;
  border-radius: 8px;
  width: 100%;
}

.aircraft-container {
  display: flex;
  gap: 20px;
  justify-content: space-evenly;
}

.aircraft-container div {
  background-color: hsl(225, 16%, 20%);
  border-radius: 8px;
  padding: 20px;
}

.aircraft-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.aircraft li {
  background-color: hsl(214, 51%, 27%);
  border-radius: 8px;
  font-size: 22px;
  font-weight: 700;
  padding: 20px;
  text-align: center;
}

/* Flight footage */

.media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  text-align: center;
  gap: 30px;
}

.media-grid iframe {
  border-radius: 8px;
  box-shadow: 3px 3px 5px var(--primary-dark);
  max-width: 100%;
}

/* About */

.about h4 {
  text-align: center;
}

.about p {
  padding-right: 20px;
}

.about a {
  color: var(--accent);
  font-size: 22px;
  margin: 40px 0;
}

.about img {
  border-radius: 20px;
}
.about-container {
  align-items: center;
  display: flex;
  justify-content: space-evenly;
}

/* footer */
footer small a {
  color: var(--accent);
}

/* Utility class(es) */
.accent {
  color: var(--accent);
}

.list-style {
  list-style: circle;
}

.reg-bold {
  font-weight: 500;
}

/* Media queries for responsive styling */

/* Medium-sized screens */

@media only screen and (max-width: 768px) {
  section {
    max-width: 100%;
  }

  header {
    padding: 30px 10px 120px 10px;
  }

  header h1,
  header h2 {
    text-align: center;
  }

  header h1 {
    margin: 140px 0 0 0;
  }

  header nav a {
    margin-right: 0;
  }

  .resume {
    display: block;
    margin: 0 auto;
    width: 66%;
  }

  .top-link-nav {
    margin-top: 15px;
  }

  .nav-link {
    background: linear-gradient(
      hsla(225, 16%, 10%, 0.2),
      hsl(198, 73%, 48%, 0.9)
    );
    margin-bottom: 15px;
    padding: 10px;
    text-align: center;
  }
  .navbar-toggler {
    background: hsla(198, 73%, 48%, 0.15);
    border: 1px solid var(--accent);
  }

  .dropdown-menu {
    margin-bottom: 15px;
  }

  .aircraft-container {
    flex-direction: column;
  }

  div.media-grid {
    grid-template-columns: 1fr;
  }

  .about-container {
    flex-direction: column-reverse;
  }

  .about p {
    padding-right: 0;
  }

  .about picture {
    display: block;
    margin-bottom: 30px;
    text-align: center;
  }
}

/* Small screens */

@media only screen and (max-width: 625px) {
  h1 {
    font-size: 58px;
  }

  p {
    font-size: 16px;
  }

  section {
    padding: 15px;
  }

  .resume {
    width: 90%;
  }

  .education h4 {
    font-size: 20px;
  }

  ul.list-style li {
    margin-left: 20px;
  }

  .timeline {
    padding-left: 15px;
  }

  .hours-in-flight ul {
    flex-direction: column;
  }

  .hours-in-flight li {
    font-size: 16px;
    width: 90%;
  }

  .carousel h5 {
    font-size: 18px;
  }

  .carousel p {
    font-size: 16px;
  }

  .carousel-inner {
    width: 85%;
  }

  .aircraft li {
    padding: 15px;
  }

  .about a {
    display: block;
    text-align: center;
  }

  .about li {
    font-size: 16px;
  }

  .about img {
    height: auto;
    max-width: 100%;
  }
}