:root {
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-weight: 400;
  font-size: 16px;

  --color-primary: #00dc82;
  --color-secondary: #003543;
  --color-text: #fff;
  --color-dark: #001e26;
  --color-dark-translucent: #001e2699;
  --color-light: #012a35;
  --color-lighter: #255461;
  --color-light-translucent: #012a3599;
}

#app {
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background: url("../assets/desert-road-green.jpg") center / cover no-repeat
    fixed;
}

#appLayoutGrid {
  width: 90%;
  height: 99%;
  transition: width 200ms;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 15% 1fr;
  grid-template-rows: 1fr auto;
  grid-template-areas:
    "app-nav app-content"
    "app-footer app-footer";
}

#appLayoutGrid > * {
  min-width: 0;
  min-height: 0;
  position: relative;
}

#appNav {
  grid-area: app-nav;
  background: var(--color-light-translucent);
  backdrop-filter: blur(2px);
}

.nav-item {
  display: block;
  line-height: 2;
  padding-left: 5%;
  font-size: 1.25em;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--color-dark);
  color: var(--color-text);
  background: var(--color-lighter);
  transition: all 200ms;
}

.nav-item:hover {
  color: var(--color-primary);
  background: var(--color-dark-translucent);
}

.nav-subitem {
  padding-left: 15%;
  font-weight: 500;
  background: var(--color-secondary);
}

#appContent {
  grid-area: app-content;
  background: var(--color-light);
  overflow: hidden auto;
  padding: 0 20px 30px 20px;
}

#appContent .header {
  color: var(--color-primary);
  font-size: 4rem;
  line-height: 2.5;
}

#appContent .subheader {
  color: var(--color-text);
  font-size: 3rem;
  line-height: 2;
}

#appContent .text {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.5;
}

#appContent .img-container {
  padding: 1.5rem 0;
  display: flex;
  justify-content: center;
}

#appContent .img-container > img {
  width: 300px;
  max-width: 100%;
  height: auto;
}

#appContent .form {
  color: var(--color-text);
  font-size: 1.1rem;
  line-height: 1.5;
  padding: 30px 20% 15px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto 1fr;
  column-gap: 15%;
  row-gap: 10px;
  grid-template-areas:
    "name age"
    "description options"
    "description submit";
}

#appContent .form .lead {
  color: var(--color-primary);
  font-weight: 500;
}

#appContent .form .form__name {
  grid-area: name;
}

#appContent .form .form__name .form__name__input {
  width: 100%;
  box-sizing: border-box;
  color: var(--color-dark);
}

#appContent .form .form__description {
  grid-area: description;
  display: flex;
  flex-flow: column nowrap;
}

#appContent .form .form__description .form__description__textarea {
  flex-grow: 1;
  margin: 0;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  color: var(--color-dark);
}

#appContent .form .form__name .form__name__input,
#appContent .form .form__description .form__description__textarea {
  outline: none;
  border: 1px solid var(--color-dark);
}

#appContent .form .form__name .form__name__input:focus,
#appContent .form .form__description .form__description__textarea:focus {
  outline: none;
}

#appContent .form .form__age {
  grid-area: age;
}

#appContent .form .form__options {
  grid-area: options;
}

#appContent .form .form__submit {
  grid-area: submit;
  place-self: start;
  color: var(--color-dark);
  padding: 0 5px;
  font-size: 1rem;
  line-height: 1.5;
  font-weight: 600;
  cursor: pointer;
}

#appContent .grid-table {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: auto;
  gap: 2px;
}

#appContent .grid-table > * {
  min-width: 0;
  min-height: 0;
  font-size: 1rem;
  line-height: 3;
  color: var(--color-text);
  text-align: center;
}

#appContent .grid-table > *:nth-child(6n + 4),
#appContent .grid-table > *:nth-child(6n + 5),
#appContent .grid-table > *:nth-child(6n + 6) {
  background: var(--color-secondary);
}

#appContent .grid-table .grid-table__header {
  background: var(--color-lighter);
  color: var(--color-primary);
  font-weight: 600;
}

#appFooter {
  grid-area: app-footer;
  background: var(--color-dark);
  text-align: center;
  color: var(--color-text);
  font-size: 1rem;
  line-height: 2;
  transition: line-height 200ms;
}

@media (max-width: 960px) {
  :root {
    font-size: 15px;
  }

  #appLayoutGrid {
    width: 96%;
  }

  #appContent .form {
    padding: 30px 10px 15px 10px;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 10rem auto auto;
    column-gap: 0;
    row-gap: 10px;
    grid-template-areas:
      "name"
      "age"
      "description"
      "options"
      "submit";
  }

  #appFooter {
    line-height: 1.5;
  }
}