@import url('https://fonts.googleapis.com/css?family=Fira+Sans:300,600,800');

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  text-decoration: none;
  list-style: none;
}

:root {
  --ff: 'Fira Sans', sans-serif;

  --fw-n: 300;
  --fw-m: 600;
  --fw-b: 800;

  --fs-2: 3rem;
  --fs-p: 1rem;

  --primary-clr: #225560;
  --secondary-clr: #36213e;
  --secondary-clr-light: #554971;
  --accent-clr: #ef6461;

  --spacer: 1rem;
  --spacer-md: calc(var(--spacer) * 2);
  --spacer-lg: calc(var(--spacer) * 3);

  --shadow: 0 0 1em rgba(0, 0, 0, 0.25);
  --br: 5px;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--ff);
}

section {
  background-color: white;
}

/* Menu */

section.menu {
  width: min(1000px, 90%);
  margin-bottom: 2rem;
}

nav {
  width: 90%;
  background-color: var(--primary-clr);
  color: white;
  margin: 0 auto;
  padding: 0 2rem;
}

label.bars,
label.logo {
  font-size: 1.5rem;
  line-height: 2em;
}

label.bars {
  display: none;
}

label.logo {
  margin-left: 1rem;
  letter-spacing: 2px;
}

#check {
  display: none;
}

nav ul {
  float: right;
}

nav ul {
  margin: 0;
  padding: 0;
}

nav li {
  list-style: none;
  display: inline-block;
  padding: 0 0.5em;
  line-height: 3rem;
  color: white;
  cursor: pointer;
}

nav li:hover,
nav li.selected {
  color: var(--primary-clr);
  background-color: whitesmoke;
}

nav a {
  text-decoration: none;
  color: whitesmoke;
}

nav li:hover a,
nav li.selected a {
  color: var(--primary-clr);
}

nav #subject {
  cursor: pointer;
}

nav #subject img {
  width: 32px;
}

@media (max-width: 780px) {
  section.menu {
    width: 100%;
    position: absolute;
    top: 0;
    margin: 0;
  }

  nav {
    width: 100%;
  }

  label.bars {
    display: inline-block;
  }

  nav ul {
    position: fixed;
    left: -100%;
    top: 3rem;
    z-index: 999;
    background-color: whitesmoke;
    transition-duration: 0.5s;
    transition-property: left;
  }

  nav li {
    display: block;
    padding: 0.5em 2em;
    cursor: pointer;
    font-weight: var(--fw-m);
  }

  nav li a {
    color: var(--primary-clr);
  }

  nav li:hover,
  nav li.selected {
    background-color: var(--primary-clr);
  }

  nav li:hover a,
  nav li.selected a {
    color: whitesmoke;
  }

  nav #subject {
    position: absolute;
    top: 0.75rem;
    right: 2rem;
  }

  #check:checked ~ ul {
    left: 0;
    transition-duration: 0.5s;
    transition-property: left;
  }
}

/* end of menu */

h2 {
  font-size: var(--fs-2);
  font-weight: var(--fw-l);
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 var(--spacer);
}

strong {
  font-weight: var(--fw-m);
}

.button {
  display: inline-block;
  background: var(--primary-clr);
  color: white;
  text-decoration: none;
  padding: 1em 1.5em;
  border-radius: var(--br);
  font-weight: var(--fw-b);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.8rem;
}

.button.big {
  padding: 0.25rem 1rem;
  font-size: 1.5rem;
  line-height: 2rem;
}

.button--card {
  margin-top: var(--spacer);
}

section {
  width: min(1000px, 90%);
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.container > h4 > span.category-change {
  cursor: pointer;
}

.main__grid {
  display: grid;
  grid-gap: var(--spacer-md);
}

@media (min-width: 640px) {
  .main__grid {
    grid-template-columns: repeat(1, 1fr);
  }
}

@media (min-width: 780px) {
  .main__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  section.main {
    height: calc(100vh - 8rem);
  }
}

.card {
  border-radius: var(--br);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
}

.card.mono {
  padding: 1rem;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
}

.card div {
  display: inline-block;
  padding: 0.5em 1em;
  vertical-align: middle;
  font-size: 1.15rem;
}

.mono div {
  width: 100%;
  margin: 0 0;
  padding: 0.5em 0;
  display: block;
}

.picture img {
  width: min(100%, 240px);
  float: right;
}

div.buttons {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  margin-top: 3rem;
  display: flex;
  justify-content: space-between;
}

button.previous,
button.next {
  /*position: fixed;*/
  font-size: 1rem;
  padding: 0.5em 1em;
  width: min(50%, 240px);
  background: var(--primary-clr);
  color: white;
  text-decoration: none;
  padding: 1em 1.5em;
  border-radius: var(--br);
  font-weight: var(--fw-b);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.8rem;
  cursor: pointer;
}

button.button[disabled='disabled'],
button.previous[disabled='disabled'],
button.next[disabled='disabled'] {
  background: var(--primary-clr);
  color: grey;
  cursor: default;
}

@media (max-width: 780px) {
  .container {
    margin-top: 5rem;
    margin-bottom: 3rem;
  }
  .card.mono {
    flex-direction: column;
    justify-content: space-around;
  }
}

@media (max-width: 640px) {
  button.previous,
  button.next {
    position: fixed;
  }

  button.previous {
    right: 50%;
    bottom: 0;
  }

  button.next {
    left: 50%;
    bottom: 0;
  }
}

.german {
  font-size: 1.25em;
  color: var(--primary-clr);
}

.english,
.french {
  color: var(--accent-clr);
  font-size: 1.5em;
  background-color: whitesmoke;
  height: 50%;
}

.german::before {
  content: 'de';
  font-size: 0.75em;
  margin-right: 0.25em;
}

.english::before {
  content: 'en';
  font-size: 0.75em;
  margin-right: 0.25em;
}

.french::before {
  content: 'fr';
  font-size: 0.75em;
  margin-right: 0.25em;
}

h4 {
  margin-bottom: 1.5em;
}

@media (max-width: 640px) {
  h4 {
    margin-bottom: 1.5em;
  }
}

h4 > span.category-change {
  font-size: 0.75rem;
  margin-left: 1em;
  color: var(--primary-clr);
}

.play {
  margin-right: 0.25em;
  color: var(--primary-clr);
  cursor: pointer;
}

.stats {
  margin-top: 1rem;
  font-size: 0.75em;
}

/* Ordne zu */

.words .card {
  cursor: pointer;
  padding: 0.5em 1em;
  margin: 0.25em 0;
}

.words .card:hover {
  background-color: whitesmoke;
}

.words .card h3 {
  font-size: 1.1rem;
}

/* Ende Ordne zu */

/* Schreibe */
/* Ende Schreibe */

div.input {
  padding: 0.5em 0;
}

.form-control {
  display: inline-block;
  width: min(calc(100% - 9rem), 480px);
  padding: 0.375rem 0.75rem;
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1rem;
  color: #212529;
  background-color: #fff;
  border: 1px solid var(--primary-clr);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control.inline {
  width: 240px;
}

select {
  display: block;
  width: 100%;
  margin: 1rem 0;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

audio {
  width: 360px;
  height: 54px;
}

@media (max-width: 640px) {
  .form-control {
    font-size: 1rem;
    display: block;
    width: 100%;
    margin-bottom: 2em;
  }

  audio {
    width: 100%;
  }
}

/* Subjects */

section.subjects,
section.topics {
  z-index: -1;
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: white;
}

.container.center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.container.center h4 {
  margin-top: 1rem;
}

div.subjects-container {
  display: flex;
  flex-direction: column;
  width: min(20rem, 100%);
}

div.card.subject {
  height: 8rem;
  display: flex;
  flex-direction: row;
  align-items: center;
  margin-bottom: 2rem;
  cursor: pointer;
  color: var(--primary-clr);
}

div.card.subject:hover {
  background-color: whitesmoke;
}

div.subject-image img {
  width: 6rem;
}

/* End of Subjects */

/* Topics */

.topics-container {
  width: min(100%, 30rem);
}

.topics.card {
  padding: 1rem;
}

#load-data-btn {
  margin: 1rem 0;
}

/* End of Topics */

.correct {
  color: green;
}

.big.correct {
  background-color: green;
  color: white;
}

.wrong {
  color: red;
}

.big.wrong {
  background-color: red;
  color: white;
}

.inline-result {
  float: right;
}

.card div.invisible,
.invisible {
  display: none;
}

.sentence {
  display: inline-block !important;
  margin-right: 1rem !important;
}