:root {
  scroll-behavior: smooth;
  --primary-theme-color: #000000;
  --secondary-theme-color: #8eff6a;
  --text-color: #fff;
  --shadow-color: #2b105580;
  --button-color: #61dafb;
  --button-color-active: #fff;
  --button-text-color: #000;
  --padding-section: 2em 0;
  --padding-container: 0 2em;
  --max-width-container: 1024px;
  --primary-highlight: #61dafb;
  --secondary-highlight: #51ff00;
  --border-radius: 2rem;
  --all-transitions: all 0.25s;
}

.body {
  background-color: var(--primary-theme-color);
  color: var(--text-color);
  font-family: 'Poppins', sans-serif;
  margin: 0;
}

.header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  width: 100%;
  transition: var(--all-transitions);

  img {
    height: 9vh;
  }
}

.header--scroll {
  box-shadow: 0 0.125rem 0.125rem 0 #212121;
  background-color: #08080880;
}

.header-nav {
  padding: 1rem 0;
  transition: var(--all-transitions);
}

.header-nav--scroll {
  padding: 0.5rem 0;

  img {
    height: 7vh !important;
  }
}

.header-nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width-container);
  margin: auto;
  padding: var(--padding-container);
}

.header-nav__logo-container {
  display: flex;
  align-items: center;
}

.header-nav__logo {
  width: 100%;
  height: 100%;
}

.header-nav__menu-icon-container {
  height: 2rem;
  cursor: pointer;
  margin: 0;
}

.header-nav__menu-icon {
  fill: var(--text-color);
  height: 100%;
}

.header-nav__menu-link-list {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background-image: linear-gradient(to top, var(--primary-theme-color), var(--secondary-theme-color));
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transition: var(--all-transitions);
  list-style: none;
}

.header-nav__menu-link-list--open {
  opacity: 1;
  pointer-events: auto;
}

.header-nav__menu-link-item {
  display: flex;
}

.header-nav__menu-link {
  color: var(--text-color);
  font-weight: 600;
  padding: 0.25em 1em;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--all-transitions);
}

.header-nav__menu-link--active,
.header-nav__menu-link:hover {
  background-color: var(--button-color-active);
  color: var(--button-text-color);
}

.header-nav__menu-close-icon-container {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  height: 2rem;
  cursor: pointer;
}

.header-nav__menu-close-icon {
  fill: var(--text-color);
  height: 100%;
}

.main {
  display: flex;
  flex-direction: column;
}

.slider {
  position: relative;
  display: flex;
  background-image: linear-gradient(var(--primary-theme-color), var(--secondary-theme-color));
  min-height: 100vh;
  overflow: hidden;
}

.slider::before {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6rem;
  background-image: linear-gradient(transparent, var(--primary-theme-color));
  z-index: 10;
}

.slider__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 70vh;
  justify-content: space-evenly;
  max-width: var(--max-width-container);
  margin: auto;
  padding: var(--padding-container);
  z-index: 5;

  span {
    text-align: center;

    h4 {
      margin: 0;
      text-shadow: 2px 0 #333, -2px 0 #333, 0 2px #333, 0 -2px #333,
        1px 1px #333, -1px -1px #333, 1px -1px #333, -1px 1px #333;
    }

    a {
      text-decoration: none;
    }

    mark {
      background-color: var(--secondary-highlight);
      margin-top: 0.5rem;
      padding: 0.8rem;
      font-weight: 600;
      border-radius: var(--border-radius);
    }

    mark:hover {
      box-shadow: 2px 4px 18px rgba(0, 0, 0, 0.7);
      font-size: 1.03rem;
    }
  }
}

.slider__title {
  font-size: 2rem;
  white-space: nowrap;
  margin: 0;
}

/* .slider__image {
  width: 300px;
  height: 200px;
  transition: opacity 1s ease-in-out;
  opacity: 1;
} */


.slider__learn-button {
  position: absolute;
  z-index: 5;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 75%);
  background-color: var(--button-color);
  border-radius: var(--border-radius);
  color: var(--button-text-color);
  font-size: 1rem;
  font-weight: 800;
  padding: 0.5em 2em;
  text-decoration: none;
  transition: background-color 0.25s;
}

.slider__learn-button:hover,
.slider__learn-button--active {
  background-color: var(--button-color-active);
}

.slider__stars-image-container,
.slider__moon-image-container,
.slider__mountains-behind-image-container,
.slider__mountains-front-image-container {
  position: absolute;
  display: flex;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  pointer-events: none;
}

.slider__mountains-front-image-container {
  z-index: 8;
}

.slider__stars-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 1s ease-in-out;
  opacity: 1;
}

.slider__moon-image,
.slider__mountains-behind-image,
.slider__mountains-front-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slider__moon-image {
  mix-blend-mode: screen;
}

.schedule {
  display: flex;
  padding-top: 10vh;
  padding-top: var(--padding-section);
  padding-top: 80px;
}

.schedule__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  /* max-width: var(--max-width-container); */
  margin: auto;
  padding: var(--padding-container);
  overflow: hidden;
}


.schedule__image {
  position: absolute;
  display: flex;
  width: 100%;
  margin: 0;
  padding: 0;
  z-index: -1;
}

.schedule__title {
  text-align: center;
  margin: 0;
}

.schedule__paragraph {
  text-align: center;
  margin: 0;
}

.schedule__topics {
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  gap: 3rem;
}

.schedule__topic {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.schedule__topic-icon-container {
  width: 3rem;
}

.schedule__topic-icon {
  width: 100%;
}

.schedule__topic-title {
  text-align: center;
  margin: 0;
}

.schedule__topic-paragraph {
  text-align: center;
  margin: 0;
}

.location__details {
  align-items: center;
  margin: auto;
  display: flex;
  flex-direction: column;
  width: 75vw;
}

.location__details h4 {
  text-align: center;
  color: var(--secondary-theme-color);
  font-weight: 500;
  font-size: 1.25rem;
}

.location__details p {
  text-align: center;
  margin: auto;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  margin: 1vw 5vw;
}

.location__map {
  align-items: center;
  margin: auto;
  display: flex;
  flex-direction: column;
  width: 75vw;
}

.location__map h4 {
  text-align: center;
  margin: 0px;
  color: var(--secondary-theme-color);
  font-weight: 500;
  font-size: 1.15rem;
}

.location__map p {
  text-align: center;
  margin: auto;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  margin: 1vw 5vw;
}

.location__map img {
  width: 100%;
  height: auto;
  -webkit-transform: scale(1);
  transform: scale(1);
  -webkit-transition: .3s ease-in-out;
  transition: .3s ease-in-out;
}

.location__map figure {
  margin: 0;
  padding: 0;
  max-width: 500px;
  background: #fff;
  overflow: hidden;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.location__map img:hover {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}

.sponsor {
  display: flex;
  padding: var(--padding-section);
  background-color: #212121;
}

.sponsor__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: auto;
  gap: 2rem;
}

.sponsor__section {
  display: flex;
  flex-direction: column;
  align-items: center;

  h4 {
    font-weight: 500;
    font-size: 0.78rem;
    margin-bottom: 1rem;
    margin-top: 2rem;
  }
}

.sponsor__topics {
  display: grid;
  align-items: center;
  gap: 1.5rem;
}

.sponsor__topic {
  display: flex;
  gap: 1.5rem;
  margin: auto;
}

.sponsor__topic-icon-container {
  width: auto;
}

.sponsor__topic-icon {
  width: 100%;
  filter: invert(100%) sepia(100%) saturate(0%) hue-rotate(180deg);
}

@media (min-width: 754px) {
  :root {
    --padding-container: 0 0.75em;
  }

  .header-nav__menu-icon-container,
  .header-nav__menu-close-icon-container {
    display: none;
  }

  .header-nav__menu-link-list {
    position: static;
    flex-direction: row;
    background-image: none;
    opacity: 1;
    width: auto;
    pointer-events: auto;
  }

  .slider__learn-button {
    font-size: 1.25rem;
    top: 52.5%;
  }

  .schedule__topics,
  .sponsor__topics {
    display: flex;
    flex-direction: column;
  }

  .location__details {
    width: 75vw !important;
  }
}