* {
  box-sizing: border-box;
}

body {
  background-color: #da647d;
  background: linear-gradient(135deg, #da647d, #d35b85, #ca548e, #bd4f98, #ad4ca1);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: 'Roboto', sans-serif;
  color: #fff;
  font-weight: normal;
  margin: 0;
}

header {
  width: 100%;
  display: flex;
  flex-direction: column;
}

h1 {
  font-family: 'Fredoka One', Arial, Helvetica, sans-serif;
  font-size: 2rem;
  align-self: flex-start;
  margin: 1em 0 0.5em 0;
}

header p {
  margin: 0 0 1.5em 0;
}

header p,
#start-btn {
  font-size: 1rem;
}

#info-btn,
#close-btn {
  position: absolute;
  top: 36px;
  right: 24px;
  right: 10vw;
  width: 2em;
  height: 2em;
  cursor: pointer;
}

#info-btn {
  opacity: 0.4;
  transition: opacity .2s ;
}

#info-btn:hover {
  opacity: 1;
}

#close-btn {
  z-index: 10;
}

#info-panel {
  display: flex;
  justify-content: flex-end;
  position: absolute;
  top: 0;
  right: 0;
  background: #333;
  color: #fff;
  width: 800px;
  height: 100%;
  line-height: 1.5;
  clip-path: circle(0% at 100% 0%);
  transition: clip-path .3s ease-in-out;
}

.info-text {
  width: 300px;
  padding: 80px 30px 30px 30px;
}

.container {
  width: 80vw;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.canvas-wrapper {
  aspect-ratio: 4 / 3;
  width: 100%;
  border-radius: 5px;
  background: #f0f0f0;
  box-shadow: 0 4px 8px#58162562;
}

.loading-circle {
  border: 12px solid #fff; 
  border-radius: 50%; 
  border-top: 12px solid #0095dd; 
  width: 70px; 
  height: 70px; 
  margin: 30% auto;
  animation: spin 1s linear infinite;
}

@keyframes spin { 
  100% { 
    transform: rotate(360deg); 
  } 
}

.vb-canvas {
  background: #f0f0f0;
  display: block;
  border-radius: 5px;
}

#start-btn {
  cursor: pointer;
  border: 0;
  padding: 10px 20px;
  margin: 1em;
  background: #333;
  color: #fff;
  border-radius: 8px;
  transform: scale(1);
  transition: transform 250ms;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.35);
  }
  100% {
    transform: scale(1);
  }
}

#start-btn.pulse {
  animation: pulse 350ms 1 linear;
}

#start-btn:hover {
  background: #111;
  transform: scale(1.15);
}

#start-btn:active {
  background: #111;
}

#start-btn:disabled {
  cursor: not-allowed;
}

@media (min-width: 660px) {
  h1 {
    font-size: 3rem;
  }
  
  header p,
  #start-btn {
    font-size: 1.5rem;
  }
  
  #info-btn,
  #close-btn {
    top: 62px;
  }
}

@media (min-width: 1000px) {
  header {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline; 
  }

  #info-btn,
  #close-btn {
  top: 36px;
  right: 36px;
  }
}