html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

:root {
  --body-color: #ecf2f9;
  --bg-color: #eee;
  --item-height: 60px;
  --bar-height: 24px;
  --bead-width: 60px;
  --grid-container-color: #199eff;
  --grid-item-color: inherit;
  --bar-color: #000;
  --bead-color-inactive: #fff;
  --bead-color-active: #ffcc00;
  --heading-dark2: #002d4d;
  --heading-dark: #0086e6;
  --heading-darker: #0068b3;
  --heading-darkest: #002d4d;
  --heading-light: #cceaff;
  --heading-bg-color: #e6f4ff;
  --heading-bg-color-darker: #cce9ff;
  --wide-pg-color: #004a80;
  --footer-border-color: #daeefd;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background-color: var(--body-color);
}

h1,
h2,
h3,
h4,
p {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

main {
  padding: 0rem 0 2rem 0;
  display: flex;
  flex-direction: column;
  margin: 0;
  background-color: #fff;
}

section.container {
  padding: 20px 20px;
}

section.wide_hm_pg {
  margin: 20px 0;
  background-color: var(--heading-bg-color);

}

footer {
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: inherit;
  border-top: 1px solid var(--footer-border-color);

}

h1 {
  font-weight: 400;
  font-size: 2rem;
  margin: 1em auto;
  text-align: center;
  color: var(--heading-dark);
}
h2 {
  font-weight: 400;
  font-size: 1.8rem;
}
h3 {
  font-weight: 400;
  font-size: 1.6rem;
}

h4 {
  margin-bottom: 0em;
  font-weight: 500;
  font-size: 1.2rem;
}

p {
  line-height: 1.6em;
}

p.st {
  text-align: center;
  font-size: 1.3em;
  color: #3d3d3d;
  font-weight: 400;
}

a.lh {
  text-decoration: none;
  color: #333;
}

a.lh:hover {
  text-decoration: none;
  color: #000;
}

a.lt {
  text-decoration: none;
  color: var(--heading-darker);
  background-color: var(--heading-bg-color);
  transition: all 0.2s;
  padding: 8px 12px;
  font-weight: 500;
  border-radius: 5px;
}

a.lt:hover {
  background-color: var(--heading-bg-color-darker);
}
img {
  max-inline-size: 100%;
  block-size: auto;
}
img.si_hm_pg {
  background-color: #000;
  border: 5px solid #000;
  width: 200px;
  height: 225px;
}

.para-output {
  background-color: red;
}



section.container-instructions {
  margin: 0 0 1rem 0;
}

section.container-language {
  margin: 1rem auto;
}

section.container-language input[type="radio"] {
  display: none;
}

section.container-language label {
  display: inline-block;
  background-color: #fff;
  padding: 10px;
  font-family: Arial;
  font-size: 1em;
  cursor: pointer;
  border: solid 1px var(--heading-bg-color-darker);
}

section.container-language input[type="radio"]:checked+label {
  background-color: var(--heading-darker);
  color: #fff;
}

details {
  background-color: var(--heading-bg-color);
  border: 1px solid var(--heading-bg-color-darker);
  border-radius: 4px;
  padding: 0.5em 0.5em 0;
  cursor: pointer;
  margin-top: 10px;
}

summary {
  font-weight: bold;
  margin: -0.5em -0.5em 0;
  padding: 0.5em;
  color: var(--heading-darker);
}

span.action {
  font-weight: 700;
}

/* Top navigation bar */

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 0rem 0.5rem 0.5rem 0.5rem;
  gap: 0.5rem;
  border-bottom: solid 1px #aaa;
  background-color: var(--bar-color);
  color: var(--bg-color)
}

nav a {
  display: inline-block;
  min-width: 7rem;
  padding: 0.5rem;
  border-radius: 0rem;
  border-top: 5px solid var(--bar-color);
  text-align: center;
  text-decoration: none;
  color: var(--bg-color);
  font-size: larger;
  font-weight: 700;
  letter-spacing: 0.05em;
}

nav a:link {
  color: var(--bg-color);
}
nav a:visited {
  color: var(--bg-color);
}
nav a:hover {
  color: var(--grid-container-color);
}
nav a:active {
  color: var(--bg-color);
}
nav a:focus {
  color: var(--bg-color);
}
nav a[aria-current='page'] {
  color: var(--grid-container-color);
}
nav a[aria-current='page']:hover {
  color: var(--grid-container-color);
}
ul.home {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: inherit;
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

ul.home li {
  border: 1px solid var(--footer-border-color);
  border-radius: 5px;
  padding: 0px 20px 10px 20px;
  margin: 20px;
  background-color: #fff;
  box-shadow: -0.2em 0.2em 0.7em rgba(0, 0, 0, 0.1);
}

ul.home li>* {
  display: flex;
  justify-content: center;
  align-items: center;
  justify-self: center;
}

ul.home li p.ac {
  display: flex;
  justify-content: flex-start;
}

ul.home li p.list-item-desc {
  padding: 0;
  margin: 2em auto;
  text-align: center;
}

p.ac:before {
  position: relative;
  content: '\27A4';
  left: 0px;
  padding-right: 8px;
}

.sensory-feature {
  border: 1px solid var(--heading-darker);
  border-radius: 5px;
  background-color: #fff;
  padding: 1em 2em;
  margin: 1em 0;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.sensory-icon-tile-img {
  display: flex;
  justify-content: center;
  align-items: center;
}

h2.sensory-heading {
  color: var(--heading-darker);
  font-weight: 400;
  font-size: 2em;
  text-align: center;
}

p.sensory-overview {
  color: var(--heading-darkest);
}

.sensory-feature h4 {
  color: var(--heading-darker);
  font-size: 1.5em;
}

[class*="i-"] {
  color: #00a5ae;
  font-size: 50px;
  font-style: normal;
  margin-bottom: -0.25em;
}

ul.col-2 {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  list-style: none;
}

ul.col-2 li {
  margin: 10px 0 0 0;
  padding: 0px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.sensory-heading {
  color: var(--heading-dark);
}

p.sensory-emoji {
  font-size: 3em;
}

p a.tl {
  color: var(--heading-darker);
  background-color: var(--heading-bg-color);
  padding: 0 3px;
  position: relative;
  margin: 0 -2px;
}

p a.tl:hover {
  background-color: var(--heading-bg-color-darker);
}

p.ca {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Footer styles */

ul.footer_nav {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}

ul.footer_nav li {
  padding: 8px 16px;
  margin: 0 auto;
}

ul.footer_nav li>a {
  text-decoration: none;
  color: #000;
  padding: 8px 16px;
}

ul.footer_nav li>a:hover {
  text-decoration: underline;
  border: 2px dotted #000;
}

footer>section {
  margin: 30px 0;
}

/* Part 2 */


.number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100px;
  background-color: #000;
  color: #fff;
  font-size: 2em;
  margin: 0;
  padding: 10px 0;
}

section.counting-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: inherit;
}

section.btn-container {
  padding: 10px 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: inherit;
}





.tool-container {
  display: flex;
  justify-content: center;
  padding: 0px 0;
  margin: 20px 0 0 0;
  width: auto;
}

.rod-container {
  display: flex;
  flex-direction: row;
  border: 5px solid var(--bar-color);
  background-color: var(--grid-container-color);
  justify-content: center;
}

.grid-container {
  display: grid;
  grid-template-columns: auto;
  grid-gap: 0px;
  justify-items: center;
  align-items: center;
  min-width: 80px;
  position: relative;
}

.grid-container:first-of-type {
  min-width: 100px;
}

.grid-container:last-of-type {
  min-width: 100px;
}

.grid-item {
  width: 100%;
  height: var(--item-height);
  background-color: var(--grid-item-color);
  display: flex;
  justify-content: center;
  z-index: 3;
}


button {
  width: var(--bead-width);
  height: var(--item-height);
  border-radius: 50%;
  border: 0;
  cursor: pointer;
  z-index: 5;
}

.bead {
  display: inline-block;
  visibility: hidden;
  border-radius: 50%;
  border: 1px solid var(--bar-color);
  transition: 0s;
}

.bead:focus {
  border-color: var(--bar-color);
}

.bead:hover .active {
  background-color: var(--bead-color-active);
}

.bead:hover .inactive {
  background-color: var(--bead-color-inactive);
}

.bead:active {
  background-color: var(--bead-color-active);
}

.inactive {
  visibility: visible;
  background-color: var(--bead-color-inactive);
  opacity: 1;
}

.active {
  visibility: visible;
  background-color: var(--bead-color-active);
  opacity: 1;
}

.grid-item button:first-of-type {
  grid-row: 1;
}

.grid-item button:nth-of-type(2) {
  grid-row: 2;
}

.grid-item button:nth-of-type(3) {
  grid-row: 4;
}

.grid-item button:nth-of-type(4) {
  grid-row: 5;
}

.grid-item button:nth-of-type(5) {
  grid-row: 6;
}

.grid-item button:nth-of-type(6) {
  grid-row: 7;
}

.grid-item button:last-of-type {
  grid-row: 8;
}

.bar {
  height: var(--bar-height);
  background-color: var(--bar-color);
}

.vertical-rod {
  width: 12px;
  z-index: 2;
  background-color: var(--bar-color);
  height: 100%;
  position: absolute;
  top: 0;
}


/* Important CSS for slider */


ul#accordion {
  margin: 0 auto;
  padding: 0;
  list-style-type: none;
  width: 290px;
  background-color: var(--heading-bg-color);
  border: 0px solid var(--heading-bg-color-darker);
  border-radius: 5px;
}

ul#accordion li {
  margin: 0;
  padding: 0;
  border: 1px solid var(--heading-bg-color-darker);
  border-radius: 5px;
}

ul#accordion li button {
  margin: 0px 0;
  padding: 8px 10px;
  width: 100%;
  height: auto;
  border: 1px solid var(--heading-bg-color-darker);
  background-color: var(--heading-bg-color);
  cursor: pointer;
  font-size: 1.5em;
  color: var(--heading-darker);
}

ul#accordion li button:hover {
  color: var(--heading-darker)
}

button.sl {
  display: flex;
  justify-content: space-between;
  border-radius: 5px 5px 0px 0px;

}

ul#accordion li ol {
  margin: 10px 0;
  border: 0;
}

ul#accordion li ol li {
  border: 0px solid #dfdede;
  margin: 0 10px 0 -10px;
  padding: 0;
  background-color: inherit;
  color: #000;
}

span.button-title {
  font-weight: 400;
  margin-left: 4px;
}

span.button-icon {
  color: inherit;
  margin-right: 4px;
}

.accordion-icon-svg {
  stroke: currentColor;
  stroke-width: 3px;
}

.accordion-icon-svg-active {
  animation: chevron-active;
  animation-duration: 300ms;
  animation-timing-function: ease-in-out;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
}

.accordion-icon-svg-inactive {
  animation: chevron-inactive;
  animation-duration: 300ms;
  animation-timing-function: ease-in-out;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
  stroke: currentColor;
}

section {
  margin: 0;
  padding: 0;
}

p.slider-content {
  padding: 10px;
  line-height: 1.5em;
  background-color: #ffcc00;
}

h4.slider-content {
  padding: 0 10px;
  margin: -10px 0 -20px 0;
}



section.slider-container {
  background-color: inherit;
  max-height: 0;
  overflow: hidden;
}

.closed {
  background-color: inherit;
  max-height: 0;
}

.open {
  background-color: inherit;
  max-height: 300px;
}


@media (min-width: 1000px) {
  body {
    overflow-y: scroll;
  }


  nav a:hover {
    border-top: 5px solid var(--grid-container-color);
  }

  section.container {
    width: 900px;
    margin: 0 auto;
  }

  ul.home {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    margin: 0 auto;
    padding: 0;
    width: 100%;
  }

  ul.home li {
    width: 280px;
    padding: 0 10px;
    margin: 0 0px;
  }

  ul.home li p.ac {
    justify-content: flex-start;
  }

  p.ac:before {
    left: 0px;
    padding-right: 8px;
  }

  ul.col-2 {
    flex-direction: row;
  }


}

@media screen and (max-width: 1000px) and (min-width: 601px) {
  ul.home li p.ac {
    justify-content: center;
  }

  p.ac:before {
    left: 0px;
    padding-right: 8px;
  }

  ul.col-2 {
    flex-direction: row;
  }
}

@media screen and (max-width: 600px) {
  nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    gap: 0rem;
    border-bottom: none;
  }

  nav a {
    display: inline-block;
    flex-basis: 50%;
    min-width: 0rem;
    padding: 0.5rem;
    border: 1px solid #fff;
    border-radius: 0;
    border-top: 0px;
    text-align: center;
  }

  nav a:hover {
    color: inherit;
    border-top: 0px;
  }

  nav a:focus {
    border-top: 0px;
  }

}

@media screen and (max-width: 330px) {
  section.container-language label {
    display: block;
  }
}