:root {
  font-size: 16px;
  font-family: "Nunito", sans-serif;
  --text-primary: #b6b6b6;
  --text-secondary: #ececec;
  --bg-primary: #23232e;
  --bg-secondary: #141418;
  --transition-speed: 600ms;
  scroll-behavior: smooth;
}

html {
  scroll-behavior: smooth;
}

body {
  color: black;
  background-color: var(--bg-primary);
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

/* public */
.container {
  height: 100vh;
}

.special-container {
  background-color: var(--bg-primary);
  width: 100%;
  height: fit-content;
  position: relative;
  color: var(--text-primary);
}

.container-light {
  background-color: var(--bg-primary);
  width: 100%;
  position: relative;
  padding: 40px 0;
  margin: 0;
  color: var(--text-primary);
}

/* background */
.background {
  position: fixed;
  background: url("../img/pexels-lukas-574071.jpg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 100vh;
  z-index: -10;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.background:before {
  content: "";
  background: rgba(0, 0, 0, 0.6);
  position: absolute;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  z-index: -9;
  width: 100%;
  height: 100vh;
}

main {
  margin-left: 5rem;
  padding: 1rem;
  z-index: 2;
}

/* navbar */
.navbar {
  position: fixed;
  background-color: var(--bg-primary);
  transition: width 600ms ease;
  overflow: hidden;
  z-index: 11;
}

.navbar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
}

.nav-item {
  width: 100%;
}

.nav-item:last-child {
  margin-top: auto;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 5rem;
  color: var(--text-primary);
  text-decoration: none;
  filter: grayscale(100%) opacity(1);
  transition: var(--transition-speed);
}

.nav-link:hover {
  filter: grayscale(0%) opacity(1);
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.link-text {
  display: none;
  margin-left: 1rem;
  font-weight: 700;
  font-size: 18px;
}

.nav-link svg {
  width: 2rem;
  min-width: 2rem;
  margin: 0 1.5rem;
}

.fa-primary {
  color: #a71106;
}

.fa-secondary {
  color: #671a16;
}

.fa-primary,
.fa-secondary {
  transition: var(--transition-speed);
}

.logo {
  font-weight: bold;
  text-transform: uppercase;
  margin-bottom: 1rem;
  text-align: center;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  font-size: 1.5rem;
  letter-spacing: 0.3ch;
  width: 100%;
}

.logo svg {
  transform: rotate(0deg);
  transition: var(--transition-speed);
}

.logo-text {
  display: inline;
  position: absolute;
  left: -999px;
  transition: var(--transition-speed);
}

.navbar:hover .logo svg {
  transform: rotate(-180deg);
}

/* about us */
.about_us::before {
  content: "Learn more ";
  color: var(--text-primary);
  text-decoration: none;
}

/* Small screens */
@media only screen and (max-width: 600px) {
  .navbar {
    bottom: 0;
    width: 100vw;
    height: 5rem;
  }

  .logo {
    display: none;
  }

  .navbar-nav {
    flex-direction: row;
  }

  .nav-link {
    justify-content: center;
  }

  main {
    margin: 0;
  }

  .special-container {
    height: fit-content;
  }
}

/* Large screens */
@media only screen and (min-width: 600px) {
  .navbar {
    top: 0;
    width: 5rem;
    height: 100vh;
  }

  .navbar:hover {
    width: 18rem;
  }

  .navbar:hover .link-text {
    display: inline;
  }

  .navbar:hover .logo svg {
    margin-left: 15rem;
  }

  .navbar:hover .logo-text {
    left: 0px;
  }
}

.dark {
  --text-primary: #b6b6b6;
  --text-secondary: #ececec;
  --bg-primary: #23232e;
  --bg-secondary: #141418;
}

.light {
  --text-primary: #1f1f1f;
  --text-secondary: #000000;
  --bg-primary: #ffffff;
  --bg-secondary: #e4e4e4;
}

.solar {
  --text-primary: #576e75;
  --text-secondary: #35535c;
  --bg-primary: #fdf6e3;
  --bg-secondary: #f5e5b8;
}

.theme-icon {
  display: none;
}

.dark #darkIcon {
  display: block;
}

.light #lightIcon {
  display: block;
}

.solar #solarIcon {
  display: block;
}