:root {
  /* color variables */
  --color-bg: #ffffff;
  --color-bg-productivision-header: #000000;
  --color-bg-productvision: #a9d6e8;
  --color-text: #000000;
  --color-text-alt: #ffffff;
  --color-primary: #ffe789;
  --color-secondary: #97a7b9;

  /* styling variables */
  --margin-body: 1rem;
  --flex-gap: 0.5rem;
  --border-radius: 1.5625rem;

  font-size: 12pt;
  color: var(--color-text);
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
}

li::marker {
  font-size: 2rem;
  text-align: center;
}

h2 {
  font-family: Kanit, sans-serif;
  font-size: 60px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
}

h3 {
  font-family: Kanit, sans-serif;
  font-size: 52px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  margin-block: 0;
  text-align: center;
}

h4 {
  font-family: Gudea, sans-serif;
  font-size: 35px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
}

h5 {
  font-family: Gudea, sans-serif;
  font-size: 25px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  margin-block-end: unset;
  padding-inline: 1rem;
  margin: unset;
  margin-block-start: 1.5rem;
}

p {
  font-family: Gudea, sans-serif;
  font-size: 35px;
  font-style: normal;
  font-weight: 400;
  line-height: normal;
}

header {
  /* temporarily disable sticky for presentation purposes */
  /* position: sticky; */
  top: 0;
  width: 100%;
  background-color: var(--color-bg);
  margin: 0;
  overflow-x: hidden;
}

menu {
  width: auto;
  margin: 0;
  padding: 45px 0px;
  margin-inline: var(--margin-body);
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  display: flex;
  li {
    color: var(--color-text);
    font-family: Kanit, sans-serif;
    font-size: 35px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    list-style-type: none;
    max-width: max-content;
    height: 100%;
    a {
      height: max-content;
      vertical-align: middle;
      text-decoration: none;
    }
    a:visited {
      color: var(--color-text);
    }
  }
  .menu-items {
    display: flex;
    flex-direction: row;
    justify-content: start;
    align-items: center;
    gap: 3rem;
  }
  .menu-teamname {
    color: var(--color-text);
    font-family: Kanit, sans-serif;
    font-size: 70px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
  }
}

section {
  margin-bottom: 0.5rem;
}

section.hero {
  background-image: url("../assets/hero-skyline.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position-y: center;
  width: 100%;
  height: 540px;
  text-align: center;
  margin: unset;
}

section.sprint {
  margin-block-end: 7rem;
  h2 {
    text-align: center;
  }
}

.sprint {
  p {
    margin: 1rem;
    margin-inline: 7rem;
  }
  li p {
    margin-inline: unset;
  }
}

.productvision-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-block-start: 2rem;

  h3 {
    color: var(--color-text-alt);
    font-size: 35px;
  }
  p {
    font-family: Gudea, sans-serif;
    font-size: 25px;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    margin-inline: unset;
  }
}

.productvision-flex-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;

  h4 {
    margin: 0;
  }
}

.productvision-background {
  background-color: var(--color-bg-productvision);
  border: solid 16px white;
}

.productvision-logo-container {
  width: 100%;
  height: 155px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.productvision-header {
  width: fit-content;
  height: max-content;
  padding: 2.6rem 2.3rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  background-color: var(--color-bg-productivision-header);
}

.productvision-chapter {
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  margin: 4rem;
  padding-block: 1rem;
}
.productvision-chapter:nth-of-type(1) {
  margin-block-start: 3rem;
}
.productvision-chapter h4 {
  padding-inline: 3rem;
}
.productvision-chapter p {
  padding-inline: 1rem;
  font-size: 25px;
}

.planning .backlog {
  margin-block-end: 9rem;
  h3 {
    margin-block: 3rem;
  }
  ul {
    margin-inline: 7rem;
  }
}

.planning {
  .grid-container {
    display: grid;
    grid-template-columns: 100%;
    align-items: stretch;
    .grid-item-background {
      height: max-content;
    }
    .grid-item {
      margin: 2rem;
      border-radius: var(--border-radius);
      padding-block-end: 6rem;
      text-align: center;
      p {
        font-family: Kanit;
        font-size: 40px;
        font-weight: 700;
      }
    }
  }
}

.backlog {
  ul {
    margin-inline: 7rem;
  }
}

section.about-us {
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-around;
  align-items: center;
  padding-inline: 4rem;
  padding-block: 6.6rem;
  gap: 6.5rem;
  background-color: var(--color-primary);
  div.flex-container {
    display: flex;
    gap: 6.5rem;
    p {
      margin: 0;
    }

    ul.people {
      list-style-type: none;
      padding-inline: unset;
      li {
        display: flex;
      }
    }
    .study {
      margin-inline-start: 10px;
      font-weight: 700;
    }
  }
}

footer {
  /* visibility: hidden; */
  p {
    font-size: medium;
  }
}
footer .footnote {
  margin-inline: var(--margin-body);
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
}

div.image-divider#drone-erasmus {
  background-image: url("../assets/drone-erasmus.png");
  background-repeat: no-repeat;
  background-position-y: center;
  background-position-x: center;
  background-size: cover;
  height: 53rem;
  p.image-credits {
    color: white;
    font-family: Kanit;
    font-size: 15px;
    font-style: normal;
    font-weight: 700;
    line-height: normal;

    margin: 1rem;
    text-align: end;
  }
}

div.divider {
  height: 4rem;
  width: auto;
  background-color: var(--color-primary);
}

.anchor {
  scroll-snap-align: start;
  scroll-margin: 20rem;
}

div.invisible {
  margin: 0;
  padding: 0;
  width: 0;
  height: 0;
}

.menu-back-to-top {
  visibility: hidden;
}

@media screen and (max-width: 1279px) {
  .planning {
    .grid-container {
      .grid-item-background:nth-of-type(2n) {
        background-color: white;
        .grid-item {
          background-color: var(--color-primary);
        }
      }
      .grid-item-background:nth-of-type(2n + 1) {
        background-color: var(--color-primary);
        .grid-item {
          background-color: white;
        }
      }
      .grid-item-background:last-of-type {
        display: none;
      }
    }
  }
}
@media screen and (min-width: 768px) {
  :root {
    --margin-body: 2rem;
  }
}
@media screen and (min-width: 1280px) {
  :root {
    --margin-body: 4rem;
    --flex-gap: 2rem;
  }
  .productvision-container {
    flex-direction: row;
  }
  .planning {
    .grid-container {
      display: grid;
      grid-template-columns: 50% 50%;
      .grid-item {
        min-height: 15rem;
      }
      .grid-item-background:not(.alt) {
        background-color: white;
        .grid-item {
          background-color: var(--color-primary);
        }
      }
      .grid-item-background.alt {
        background-color: var(--color-primary);
        .grid-item {
          background-color: white;
        }
      }
    }
  }
  section.about-us {
    flex-direction: row;
  }

  .menu-back-to-top {
    visibility: visible;
  }
}

@media print {
  .menu-back-to-top {
    visibility: hidden;
  }
}