@media screen and (min-width: 320px) and (max-width: 640px){
  body {
    font-size: 120%;
  }
  button:focus {
    outline: none;
  }
  .app-container {
    overflow: hidden;
  }
  .main-container {
    max-width: 85%;
  }
  .app-info__container {
    width: 100%;
    max-width: 600px;
    position: absolute;
    top: 0;
    left: 0;
    transform: none;
  }
  .title__container {
    margin-top: 2em;
  }
  .container .title {
    width: 300px;
    margin: 0.5em auto 0;
    font-size: 3.5em;
  }
  .title__icon {
    width: 22px;
    height: auto;
  }
  .app-info__modal {
    box-sizing: padding-box;
    padding: 0.5em 1em 1.5em;
  }
  .app-info__title {
    margin-top: 1em;
    font-size: 2.5em;
  }
  .app-info__text {
    font-size: 1.1em;
  }
  .settings__message {
    width: 90%;
    padding: 3px 7px;
  }
  .settings__time {
    min-width: 160px;
    max-width: 200px;
  }
  .clock-message {
    top: -3em;
  }
  .clock__btn__play,
  .clock__btn__pause,
  .clock__btn__reset {
    width: 46px;
    height: 46px;
  }
  .clock__btn__play {
    top: 12.3em;
    left: calc(50% - 74px);
  }
  .clock__btn__pause {
    top: 14.3em;
    left: calc(50% - 23px);
  }
  .clock__btn__reset {
    top: 12.3em;
    left: calc(50% + 28px);
  }
  .clock-tooltip__play {
    bottom: 0em;
    left: calc(50% - 70px);
  }
  .clock-tooltip__pause {
    bottom: -1.8em;
    left: calc(50% - 24px);
  }
  .clock-tooltip__reset {
    bottom: 0em;
    left: calc(50% + 32px);
  }
  .footer__social-btn {
    margin-top: 0.8em;
  }
  .fa.fa-lg {
    font-size: 1.8em;
  }
}