:root {
  --bg-color: #e6e6e673;
  --white: #ffffff;
  --transparent-white: #ffffff66;
  --desert-storm: #f8f8f8;
  --soapstone: #fcfcfc;
  --black: #000000;
  --onyx: #111111;
  --dark-jungle-green: #222222;
  --ironside-grey: #666666;
  --davy-grey: #555555;
  --primary-shadow-color: #00000080;
  --secondary-shadow-color: #000000b3;
  --primary-transition: all 0.1s ease;
  --secondary-transition: 0.3s ease;
  --font-family: "Source Serif Pro", serif;
}

* {
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
  box-sizing: border-box;
}

html {
  font-size: 10px;
}

body {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100vh;
  font-family: var(--font-family);
  background-image: linear-gradient(
    to left,
    var(--bg-color),
    var(--soapstone) 50%,
    var(--bg-color)
  );
}

.keys {
  height: 79vh;
  display: flex;
  justify-content: center;
  background-image: linear-gradient(
    -65deg,
    var(--black),
    var(--dark-jungle-green),
    var(--black),
    var(--ironside-grey),
    var(--dark-jungle-green) 75%
  );
  box-shadow: 0.1rem 0.1rem 0.1rem var(--black);
  padding: 0.9rem 0 6rem;
  position: relative;
}

.key {
  height: 100%;
  width: 9rem;
  cursor: grab;
  position: relative;
  border-radius: 0.1rem;
  margin: 0 0.1rem;
  background-image: linear-gradient(-30deg, var(--desert-storm), var(--white));
  box-shadow: inset 0 0.2rem 0 var(--white), inset 0 -0.2rem 0 var(--white),
    inset 0.2rem 0 0 var(--white), inset -0.2rem 0 0 var(--white),
    0 0.5rem 0.4rem var(--secondary-shadow-color),
    inset 0 -0.2rem 0 var(--white), inset 0.2rem 0 0 var(--white),
    inset -0.2rem -0.2rem 1.6rem var(--primary-shadow-color),
    -0.3rem 0.5rem 0.7rem var(--primary-shadow-color);
}

.key:active:not(.sharp),
.playing {
  transition: var(--primary-transition);
  box-shadow: inset 0 0.2rem 0 var(--white), inset 0 -0.2rem 0 var(--white),
    inset 0.2rem 0 0 var(--white), inset -0.2rem 0 0 var(--white),
    0 0.4rem 0.4rem var(--secondary-shadow-color),
    inset 0 -0.2rem 0 var(--white), inset 0.1rem 0 0 var(--white),
    inset -0.2rem -0.2rem 1.6rem var(--black),
    -0.4rem 0.5rem 0.7rem var(--primary-shadow-color);
  height: 98.9%;
  cursor: grabbing;
}

.sharp {
  z-index: 10;
  margin-top: -0.1rem !important;
  position: absolute !important;
  height: 45% !important;
  width: 6rem;
  background-image: linear-gradient(
    -20deg,
    var(--dark-jungle-green),
    var(--black),
    var(--dark-jungle-green)
  ) !important;
  box-shadow: inset 0 -0.1rem 0.2rem var(--transparent-white),
    0 0.2rem 0.3rem var(--primary-shadow-color) !important;
  border-style: solid;
  border-color: var(--ironside-grey) var(--dark-jungle-green) var(--onyx)
    var(--davy-grey);
  border-width: 0.2rem 0.4rem 1.2rem;
}

.sharp[data-note="w"] {
  margin-right: 74.5rem;
}

.sharp[data-note="e"] {
  margin-right: 55.5rem;
}

.sharp[data-note="t"] {
  margin-right: 18.5rem;
}

.sharp[data-note="u"] {
  margin-left: 19rem;
}

.sharp[data-note="o"] {
  margin-left: 55.5rem;
}

.sharp[data-note="p"] {
  margin-left: 74.5rem;
}

.sharp:active,
.playing {
  transition: var(--primary-transition);
  border-bottom-width: 0.4rem;
  cursor: grabbing;
}

main,
footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--onyx);
}

footer {
  margin-bottom: 1.1rem;
}

.title {
  font-size: 4.3rem;
  text-transform: uppercase;
  letter-spacing: 0.3rem;
  word-spacing: 0.1rem;
}

.subtitle {
  font-size: 1.9rem;
  margin-top: 0.1rem;
}

.footer-text {
  font-size: 1.5rem;
  font-style: italic;
}

.footer-link {
  text-decoration: none;
  color: var(--onyx);
  font-weight: 600;
}

.footer-link:hover {
  color: var(--ironside-grey);
  transition: var(--secondary-transition);
}

#loadingDiv {
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  width: 100vw;
  height: 100vh;
  position: absolute;
  background-color: var(--black);
}

.loader {
  width: 9rem;
  height: 9rem;
  background: center / contain no-repeat url(../img/loader.gif);
}

::selection {
  color: var(--soapstone);
  background-color: var(--dark-jungle-green);
}

@media screen and (max-width: 1000px) {
  html {
    font-size: 9px;
  }
}

@media screen and (max-width: 900px) {
  html {
    font-size: 8px;
  }
}

@media screen and (max-width: 800px) {
  html {
    font-size: 7px;
  }
}

@media screen and (max-width: 680px) {
  html {
    font-size: 6px;
  }
}

@media screen and (max-width: 580px) {
  html {
    font-size: 5px;
  }
}

@media screen and (max-width: 480px) {
  html {
    font-size: 4px;
  }
}

@media screen and (max-width: 380px) {
  html {
    font-size: 3px;
  }
}