* {
  margin: 0;
  padding: 0;
  font-family: Arial;
}

header {
  background-color: hsl(220, 80%, 60%);
  padding: 2rem;
  color: #fff;
  display: flex;
  justify-content: center;
  margin-bottom: 4rem;
  font-size: clamp(1.3rem, 3vw, 2rem);
}

.title {
  flex-basis: 100%;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin-bottom: 4rem;
}

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

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

.daysInput {
  display: inline-block;
  margin-bottom: 2rem; 
}

.sleepInput {
  display: inline-block;
}

.schedule-container {
  display: flex;
}

.builder {
  display: flex;
}

#hours {
  margin-left: 0.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  font-size: 0.75rem;
}

#schedule {
  height: 50vh;
  width: 20vw;
  border: solid 1px;
  box-shadow: 4px 4px 10px hsl(0, 0%, 70%);
  background-color: hsl(120, 50%, 60%);
  margin-left: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
}
.block {
  flex: 1;
  background-color: hsl(120, 50%, 60%);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.block.sleep {
  background-color: hsl(0, 50%, 60%);
}

.rationale-title {
  flex-basis: 100%;
  text-align: center;
  margin-top: 4rem;
  margin-bottom: 1rem;
}

.rationale {
  margin-left: 3rem;
  margin-right: 3rem;
  line-height: 2rem;
}

footer {
  background-color: #272750;
  margin-top: 4rem;
  color: #fff;
  padding: 1.5rem;
  text-align: center;
  font-size: 1.15rem;
}

.link {
  color: #fff;
  text-decoration: none;
}

@media screen and (max-width: 720px) {
  main {
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .schedule-container {
    margin: 0;
    padding: 0;
    width: 80vw;
    align-items: center;
  }

  .builder {
    flex-direction: column;
  }

  #hours {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 51vh;
    margin-top: 2rem;
    
  }

  #schedule {
    width: 70%;
    margin-top: 2rem;
  }
}