* {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

html {
  font-family: "Roboto Slab", serif;
  font-size: 10px;
  font-weight: 700;
}

img {
  max-height: 100%;
}

.tooth {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  background: #e0f4f5 url(../img/bg.jpg) center center no-repeat;
  background-size: cover;
  width: 100%;
  height: 100vh;
  padding: 0 5%;
}
.tooth-title {
  font-size: 6rem;
}
.tooth-cubtitle {
  display: inline-block;
  font-size: 3.5rem;
  background-color: #7f70b1;
  color: #fff;
  padding: 1.5rem 2rem 2rem 2rem;
  margin-top: 2rem;
}
.tooth-description {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin-top: 9rem;
  margin-bottom: 10rem;
}
.tooth-description__img {
  height: 5rem;
}
.tooth-description__txt {
  font-family: "Roboto", sans-serif;
  font-size: 2.2rem;
  font-weight: 300;
  margin-left: 4rem;
}
.tooth-img {
  height: 90%;
  -ms-flex-item-align: end;
      align-self: flex-end;
}

.button {
  font-size: 2.2rem;
  color: #fff;
  background-color: #01c4e0;
  border: 1px solid #01c4e0;
  padding: 2rem 4rem;
  margin-right: 3rem;
  margin-bottom: 2rem;
  outline: none;
  cursor: pointer;
}
.button:hover {
  background-color: #01aec7;
}
.button-o {
  background-color: #e0f3f4;
  color: #01c4e0;
  border: 1px solid #01c4e0;
}
.button-o:hover {
  background-color: #cdeced;
}

@media (max-width: 1200px) {
  html {
    font-size: 8px;
  }
}
@media (max-width: 1002px) {
  .tooth-title {
    font-size: 5rem;
  }
  .tooth-cubtitle {
    font-size: 2.5rem;
  }

  .button {
    margin-bottom: 2rem;
  }
}
@media (max-width: 900px) {
  .tooth-img {
    height: 70%;
  }
}
@media (max-width: 802px) {
  .tooth {
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    padding: 0;
  }
  .tooth-text {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    text-align: center;
  }
  .tooth-description {
    margin: 9rem auto 10rem auto;
  }
  .tooth-img {
    display: none;
  }

  .button {
    margin: auto;
  }
  .button-o {
    margin-top: 2rem;
  }
}