:root {
  --main-color: #3f51b5;
  --main-color2: #182fb4;
  --main-color3: #747ce7;
}

html {
  font-size: 15px;
  word-break: keep-all;
}

body.active {
  overflow: hidden;
  height: 100%;
}

h2 {
  font-size: 4rem;
  line-height: 90px;
}

h3 {
  font-size: 2.3rem;
  line-height: 50px;
  font-weight: bold;
}

h5 {
  font-size: 1.7rem;
  line-height: 40px;
}

p {
  font-size: 1.3rem;
  line-height: 30px;
}

span {
  font-weight: bold;
  color: var(--main-color);
}

strong {
  font-weight: bold;
}

@media screen and (max-width: 1600px) {
  html {
    font-size: 15px;
  }

  h2 {
    font-size: 3.5rem;
  }
}

@media screen and (max-width: 1440px) {
  html {
    font-size: 13px;
  }

  h2 {
    font-size: 3.5rem;
  }
}

@media screen and (max-width: 1280px) {
  html {
    font-size: 13px;
  }

  h2 {
    font-size: 3rem;
    line-height: 65px;
  }

  h3 {
    line-height: 40px;
  }

  h5 {
    line-height: 35px;
  }

  p {
    line-height: 25px;
  }
}

@media screen and (max-width: 1025px) {
  h2 {
    font-size: 2.8rem;
    line-height: 55px;
  }

  h5 {
    font-size: 1.4rem;
    line-height: 30px;
  }

  .mainSection > .txtBox {
    gap: 20px;
  }

  .mainSection > .txtBox > .btnBox > button {
    font-size: 1.2rem;
  }
}

@media screen and (max-width: 821px) {
  html {
    font-size: 11px;
  }

  h2 {
    font-size: 2.5rem;
    line-height: 45px;
  }

  h3 {
    font-size: 2.2rem;
    line-height: 35px;
  }

  h5 {
    font-size: 1.6rem;
    line-height: 25px;
  }
}

@media screen and (max-width: 640px) {
  html {
    font-size: 16px;
  }

  h2 {
    font-size: 1.5rem;
    line-height: 45px;
  }

  h3 {
    font-size: 1.3rem;
    line-height: 35px;
  }

  h5 {
    font-size: 1.1rem;
    line-height: 35px;
  }

  p {
    font-size: 0.9rem;
    line-height: 25px;
  }

  button {
    font-size: 1rem !important;
  }
}