* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {
  font-family: 'Poppins', 'Montserrat', sans-serif;
  background-color: black;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: 30rem;
}

.heading {
  color: white;
  text-align: center;
  text-shadow: 2px 1px rgb(104, 91, 91);
  font-size: 4rem;
  font-weight: 600;
}

.music-container {
  background-color: #fff;
  border-radius: 1rem;
  box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.4);
  padding: 1rem 2rem;
  margin-top: 7rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#cover-box {
  border-radius: 1rem;
  box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.4);
  position: relative;
  bottom: 4rem;
  width: 85%;
}

#cover {
  border-radius: inherit;
  display: block;
  height: 100%;
  width: 100%;
}

#music-box {
  width: 100%;
}

#music-info {
  text-align: center;
  width: 100%;
  position: relative;
  bottom: 2rem;
}

#title {
  font-size: 2rem;
  font-weight: 600;
}

#artist {
  font-size: 1.4rem;
  font-weight: 500;
}

#progress-container {
  height: 4px;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.2);
  margin: 2rem 0 1rem;
  cursor: pointer;
  border-radius: 8px;
}

#progress {
  background-color: #000;
  width: 0%;
  height: inherit;
  border-radius: inherit;
  transition: width 100ms ease-in;
}

#timer-bar {
  display: flex;
  justify-content: space-between;
  font-size: 1.4rem;
}

#control-box {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.btn {
  display: inline-block;
  font-size: 1.6rem;
  padding: 1rem;
  cursor: pointer;
  border: none;
  outline: none;
  border-radius: 4rem;
  color: #a0a0a0;
  transition: background 200ms linear, color 200ms linear;
}

.special-btn {
  background-color: #000;
  color: #fff;
  font-size: 2.2rem;
  margin: 0 1rem;
  padding: 1.4rem;
  cursor: pointer;
  border: none;
  outline: none;
  border-radius: 4rem;
  transition: opacity 200ms linear;
}

@media (hover: hover) {
  .btn:hover {
    background-color: #d8d8d8;
    color: #545454;
  }

  .special-btn:hover {
    opacity: 0.75;
  }
}