styles.css

@font-face {
  font-family: "Comfortaa";
  src: url("fonts/Comfortaa-VariableFont_wght.ttf");
}

@font-face {
  font-family: "Lobster";
  src: url("fonts/Lobster-Regular.ttf");
}

@font-face {
  font-family: "Bangers";
  src: url("fonts/Bangers-Regular.ttf");
}

body {
  font-family: "Comfortaa", cursive;
  background-color: #fffcf9;
  display: flex;
  justify-content: center;
  overflow-x: hidden;
}

.footer {
  margin-top: 2em;
  margin: 1em;
}

.general-information {
  margin-top: 1em;
  text-align: center;
}

.video {
  margin-top: 2em;
}

.step#volume-bar {
  display: none;
}

.video#html-video[src] {
  display: block;
  max-width: 100%;
  margin-left: 1em;
  margin-right: 1em;
}

.video#html-video {
  display: none;
}

.imprint {
  font-size: 0.8em;
}

.bar {
  border-radius: 4px;
}

i {
  color: #26547c;
  font-size: 20px;
  margin-bottom: 5px;
}

.level-wrapper {
  width: 100%;
  height: 20px;
  background-color: rgba(239, 71, 111, 0.4);
  margin-bottom: -16px;
}
.level-wrapper .level {
  height: 100%;
  background-color: #ffd166;
  width: 10%;
}

.highlight-text {
  color: #06d6a0;
}

.help-text {
  font-family: Comfortaa;
  font-family: "Bangers", cursive;
  color: #ffd166;
  background-color: #ef476f;
  padding: 7px;
  font-size: 1.2em;
  border-radius: 2px;
  vertical-align: bottom;
  position: absolute;
  max-width: 240px;
  margin-top: 10px;
  margin-left: 100px;
  transform: rotate(-1deg);
}

.wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.wrapper .logo {
  width: 340px;
  font-size: 2em;
  text-align: center;
}
.wrapper .logo h1 {
  color: #26547c;
  font-family: "Lobster", cursive;
  z-index: 2;
  position: relative;
}
.wrapper .logo .claim {
  font-family: "Bangers", cursive;
  color: #ffd166;
  background-color: #ef476f;
  padding: 7px;
  padding-top: 16px;
  font-size: 1em;
  border-radius: 2px;
  margin-top: -2em;
  vertical-align: bottom;
  transform: rotate(-1deg);
  text-align: left;
}
.wrapper .content {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.wrapper .content a,
.wrapper .content button {
  background-color: #06d6a0;
  padding: 0.5em;
  color: #fffcf9;
  cursor: pointer;
  border-radius: 5px;
}
.wrapper .content button.disabled {
  opacity: 0.3;
}
.wrapper .content button.disabled:hover {
  opacity: 0.7;
}
.wrapper .content button {
  border: none;
  font-family: "Comfortaa", cursive;
  font-size: 1.2em;
}
.wrapper .content button.big-button {
  margin-top: 2.2em;
  font-size: 1.6em;
}
.wrapper .content button:hover {
  text-decoration: underline;
}
.wrapper .content .step {
  margin-top: 3em;
  max-width: 340px;
  min-width: 280px;
  border: solid 4px #26547c;
  border-radius: 2px;
  padding: 30px;
  margin-bottom: 2em;
}
.wrapper .content .step .concept.disabled {
  display: none;
}
.wrapper .content .step .concept [type="file"] {
  margin-top: 1em;
  margin-bottom: 1em;
  background: transparent;
  font-size: 1.2em;
  font-family: "Comfortaa", cursive;
}
.wrapper .content .step .video-concept-buttons {
  margin-bottom: 1em;
}
.wrapper .content .step.fix-max-width {
  max-width: 280px;
}
.wrapper .content .step [type="text"] {
  border: none;
  width: 100%;
  border-bottom: solid 4px #ef476f;
  background: transparent;
  font-family: "Comfortaa", cursive;
  margin-bottom: 1em;
  margin-top: 1em;
  font-size: 1.2em;
}

[type="range"] {
  -webkit-appearance: none;
  margin: 30px 0;
  width: 100%;
}
[type="range"]:focus {
  outline: 0;
}
[type="range"]:focus::-webkit-slider-runnable-track {
  background: #f0557a;
}
[type="range"]:focus::-ms-fill-lower {
  background: #ef476f;
}
[type="range"]:focus::-ms-fill-upper {
  background: #f0557a;
}
[type="range"]::-webkit-slider-runnable-track {
  cursor: pointer;
  height: 8px;
  transition: all 0.2s ease;
  width: 100%;
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0.2), 0 0 0px rgba(13, 13, 13, 0.2);
  background: #ef476f;
  border: 0px solid #cfd8dc;
  border-radius: 5px;
}
[type="range"]::-webkit-slider-thumb {
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2), 0 0 2px rgba(13, 13, 13, 0.2);
  background: #06d6a0;
  border: 1px solid #fffcf9;
  border-radius: 12px;
  cursor: pointer;
  height: 60px;
  width: 12px;
  -webkit-appearance: none;
  margin-top: -26px;
}
[type="range"]::-moz-range-track {
  cursor: pointer;
  height: 8px;
  transition: all 0.2s ease;
  width: 100%;
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0.2), 0 0 0px rgba(13, 13, 13, 0.2);
  background: #ef476f;
  border: 0px solid #cfd8dc;
  border-radius: 5px;
}
[type="range"]::-moz-range-thumb {
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2), 0 0 2px rgba(13, 13, 13, 0.2);
  background: #06d6a0;
  border: 1px solid #fffcf9;
  border-radius: 12px;
  cursor: pointer;
  height: 60px;
  width: 12px;
}
[type="range"]::-ms-track {
  cursor: pointer;
  height: 8px;
  transition: all 0.2s ease;
  width: 100%;
  background: transparent;
  border-color: transparent;
  border-width: 30px 0;
  color: transparent;
}
[type="range"]::-ms-fill-lower {
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0.2), 0 0 0px rgba(13, 13, 13, 0.2);
  background: #ee3964;
  border: 0px solid #cfd8dc;
  border-radius: 10px;
}
[type="range"]::-ms-fill-upper {
  box-shadow: 0px 0px 0px rgba(0, 0, 0, 0.2), 0 0 0px rgba(13, 13, 13, 0.2);
  background: #ef476f;
  border: 0px solid #cfd8dc;
  border-radius: 10px;
}
[type="range"]::-ms-thumb {
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.2), 0 0 2px rgba(13, 13, 13, 0.2);
  background: #06d6a0;
  border: 1px solid #fffcf9;
  border-radius: 12px;
  cursor: pointer;
  height: 60px;
  width: 12px;
  margin-top: 0;
}