:root {
  --screen-height: 0px;
}

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

body {
    font-family: "Open Sans", sans-serif;
    font-size: 16px;

    background-color: rgba(0, 0, 0, 1);
}

div {
  color: #FFF;
}

.main-container {
  display: flex;
  flex-direction: column;
  row-gap: 5px;

  width: 50%;
  min-width: 360px;
  height: var(--screen-height);

  margin-left: auto;
  margin-right: auto;

  align-items: center;
  justify-content: space-between;

  border-style: solid;
  border-color: #FFF;

  overflow-y: auto;
  user-select: none;
}

.section-title {
  font-size: 2em;
}

.section-content {
  width: 96%;
  overflow-y: auto;
  flex-grow: 1;
}

.section-footer {
  display: flex;
  flex-direction: column;

  width: 96%;
  min-height: 100px;
  height: 15%;

  justify-content: space-between;
}

.main-menu {
  display: flex;
  flex-direction: row;
  
  column-gap: 5px;

  margin-top: 5%;

  align-items: flex-start;
  justify-content: center;
}

.menu-content {
  width: 100%;

  font-size: 0.8em;
  text-align: justify;
  text-indent: 15%;
}

.menu-options-block {
  width: 100%;
}

.menu-options-container {
  display: flex;
  flex-direction: column;

  row-gap: 20px;

  width: 60%;

  margin-left: auto;
  margin-right: auto;
}

.menu-options-option {
  display: flex;

  height: 40px;

  text-align: center;
  font-size: 1em;

  align-items: center;
  justify-content: center;
  
  background-color: rgba(71, 71, 71, 1.0);
}

.game-window {
  display: flex;
  flex-direction: column;

  row-gap: 30px;

  margin-top: 5%;

  min-height: 0;

  align-items: center;
  justify-content: center;
}

.card-question-container {
  display: flex;
  flex-direction: column;

  align-items: center;
  justify-content: center;

  padding-left: 70px;
  padding-right: 70px;
  padding-top: 10px;
  padding-bottom: 10px;

  border-style: solid;
  border-color: #FFF;
  border-radius: 10px;

  background-color: rgba(71, 71, 71, 1.0);
}

.card-nlevel {
  text-align: center;
  font-size: 0.8em;

  color: rgba(218, 218, 218, 1.0);
}

.card-kanji {
  text-align: center;
  font-size: 3.5em;

  color: #FFF;
}

.card-kana {
  text-align: center;
  font-size: 2em;

  color: #FFF;
}

.card-english {
  text-align: center;
  font-size: 1em;
  word-break: break-all;

  color: rgba(218, 218, 218, 1.0);
}

.card-answer-container {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 40px;
  row-gap: 40px;

  width: 100%;
}

.card-answer-1 {
  display: flex;
  flex-direction: column;

  grid-column-start: 2;
  grid-column-end: span 5;

  height: 120px;

  padding-left: 10px;
  padding-right: 10px;

  justify-content: center;

  border-style: solid;
  border-color: #FFF;
  border-radius: 10px;
}

.card-answer-2 {
  display: flex;
  flex-direction: column;

  grid-column-start: 7;
  grid-column-end: span 5;

  height: 120px;

  padding-left: 10px;
  padding-right: 10px;

  justify-content: center;

  border-style: solid;
  border-color: #FFF;
  border-radius: 10px;
}

.card-answer-3 {
  display: flex;
  flex-direction: column;

  grid-column-start: 2;
  grid-column-end: span 5;
  grid-row-start: 2;

  height: 120px;

  padding-left: 10px;
  padding-right: 10px;

  justify-content: center;

  border-style: solid;
  border-color: #FFF;
  border-radius: 10px;
}

.card-answer-4 {
  display: flex;
  flex-direction: column;

  grid-column-start: 7;
  grid-column-end: span 5;
  grid-row-start: 2;

  height: 120px;

  padding-left: 10px;
  padding-right: 10px;

  justify-content: center;

  border-style: solid;
  border-color: #FFF;
  border-radius: 10px;
}

[data-card-answer-hover="true"] {
  background-color: rgba(255, 255, 255, 0.596);
}

[data-answer="true"] {
  border-style: solid;
  border-color: rgba(0, 255, 0, 1.0);
  background-color: rgba(111, 255, 111, 0.466);
}

[data-answer="false"] {
  border-style: solid;
  border-color: rgba(255, 63, 63, 1.0);
  background-color: rgba(255, 85, 85, 0.411);
}

.review-main-container {
  display: flex;
  flex-direction: column;

  height: 80%;
  min-height: 0;

  row-gap: 10px;

  align-items: center;
  justify-content: center;
}

.review-heading {
  width: 100%;

  text-align: center;

  font-size: 2.5em;

  border-style: solid;
  border-top-width: 0;
  border-left-width: 0;
  border-right-width: 0;
  border-bottom-width: 5px;
  border-bottom-color: #FFF;
}

.review-middle-container {
  display: flex;
  flex-direction: row;

  column-gap: 5px;
}

.review-container {
  display: flex;
  flex-direction: column;

  row-gap: 10px;

  margin-top: 20px;

  height: 55vh;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: none;

  align-items: center;
  justify-content: flex-start;
}

.review-content-container {
  display: flex;
  flex-direction: column;

  row-gap: 5px;

  width: 100%;

  align-items: center;
}

.review-content-container:hover {
  background-color: rgba(255, 255, 255, 0.068);
}

.review-content-heading {
  font-size: 2em;
}

.review-content-subheading {
  font-size: 1em;
}

.review-content-wrong {
  background-color: rgba(255, 85, 85, 0.411);
}

.review-footer-container {
  display: flex;
  flex-direction: row;

  margin-top: 20px;

  width: 100%;
  height: 7vh;

  align-items: center;
  justify-content: center;
}

.review-footer-refresh {
  width: 33.3%;
  height: 100%;

  font-size: 1.3em;

  text-align: center;
  vertical-align: middle;
  background-color: rgba(255, 255, 255, 0.219);
}

.footer-content {
  align-self: flex-start;
  font-size: 1em;
}

.footer-credits {
  text-align: right;
  font-size: 0.8em;
}