:root {
  --color-blue-sea: #194752;
  --color-yellow: #a09342;
  --color-violet: #764069;
}
html {
  box-sizing: border-box;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--color-blue-sea);
  color: #fff;
  font-weight: 300;
  transition: background-color 0.3s ease-in;
}
a {
  text-decoration: none;
  display: block;
}

.loader {
  width: 30%;
  height: 30%;
  margin-left: auto;
  margin-right: auto;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#root {
  scroll-snap-type: y mandatory;
  width: 100%;
  height: 100vh;
  max-height: 100vh;
  overflow-y: auto;
  scroll-behavior: smooth;
  position: relative;
}
fieldset {
  width: 100%;
  height: 95vh;
  scroll-snap-align: start;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin-left: auto;
  margin-right: auto;
  font-size: 1.2rem;
  /* per JS intersectionObserver */
  opacity: 0;
  transition: opacity 0.3s ease-in-out 0.2s;
  border: none;
}

.container {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.fieldset-quiz {
  width: 100%;
  max-width: 600px;
  padding: 1rem;
  position: relative;
}

.form-check,
.btn-next,
.btn-prev,
.btn-submit,
.btn-start,
.btn-start-again {
  width: 100%;
  height: fit-content;
  background-color: inherit;
  border: thin solid #fff;
  border-radius: 5px;
  margin-top: 1rem;
  padding: 0.5rem 0.5rem;
  color: inherit;
  font-size: 1.1rem;
  cursor: pointer;
}

.form-check-label {
  display: inline-block;
  width: 90%;
  cursor: pointer;
  margin-top: 0.5rem;
}
.btn-wrapper {
  position: absolute;
  bottom: 2.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.5rem;
}
.icons-wrapper > * {
  cursor: pointer;
}
.btn-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn-submit {
  visibility: visible;
  opacity: 0;
  visibility: hidden;
  transition: visibility, opacity 1s ease-in-out 1s;
  cursor: pointer;
}
.active {
  opacity: 1;
  visibility: visible;
}
.wrong-answer {
  border: medium solid red;
  border-radius: 5px;
}
.right-answer {
  border: medium solid green;
  border-radius: 5px;
}
.modal {
  position: fixed;
  /* width: 100%;
  height: 100%; */
  width: 100vw;
  height: 100vh;
  z-index: 10;
  background-color: rgba(0, 0, 0, 0.2);
}
.modal-article {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 600px;
  z-index: 11;
  background-color: inherit;
  border: thin solid #fff;
  color: #fff;
  text-align: center;
  padding: 2rem 0;
}

.btn-close {
  border: thick solid red;
  width: 2rem;
  height: 2rem;
  position: absolute;
  top: 0;
  right: 0;
  border: medium solid #fff;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.home-form {
  width: 100%;
  max-width: 400px;
  min-height: 200px;
  border: thin solid #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 1rem;
}
.home-form label {
  display: block;
  text-align: center;
}
.home-form > * {
  height: 100%;
  padding: 1rem 0;
}
.home-form [class^='form'] {
  border: thin solid #fff;
  border-radius: 5px;
}
.home-form [class^='custom'] {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 0.5rem auto 0;
}
.home-form option {
  text-align: center;
}
.number-questions-user {
  text-align: center;
  padding-top: 0.7rem;
}
select {
  background-color: transparent;
  border: thin solid #fff;
  color: #fff;
  padding: 0 1em 0 0;
  margin: 0;
  width: 100%;
  font-family: inherit;
  font-size: inherit;
  cursor: inherit;
  line-height: inherit;
}
select:focus {
  outline: none;
}
select option {
  background-color: transparent;
  border: thin solid #fff;
  color: #fff;
}

.picker-color {
  width: 10rem;
  height: 2.5rem;
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 10;
  display: flex;
  justify-content: space-evenly;
  align-items: center;
}
.picker-color > div{
  border: thin solid white;
  border-radius: 3px;
}
[class^='color'] {
  border: inherit;
  border-radius: 0.5rem;
  width: 1.5rem;
  height: 1.5rem;
  cursor: pointer;
}

[class$='violet'] {
  background-color: var(--color-violet);
}
[class$='yellow'] {
  background-color: var(--color-yellow);
}
[class$='blue'] {
  background-color: var(--color-blue-sea);
}

.none {
  display: none;
}

@media (min-width: 768px) {
  .btn-wrapper {
    bottom: 1rem;
  }
  fieldset {
    height: 100vh;
  }
}