style.css

@import url(fonts/fonts.css);

html, body {
  height: 100%;
  -webkit-margin-collapse: discard;
}

body {
  display: flex;
  display: -ms-flexbox;
  display: -webkit-flex;
  min-height: 100vh;
  flex-direction: column;
}

a {
  color: #000;
  text-decoration: none;
}

.header {
  background-color: #fff;
  width: 100%;
  max-width: 2560px;
  margin: 0 auto 2.5em;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: greyscale;
  font-size: 24px;
  display: flex;
  display: -ms-flexbox;
  display: -webkit-flex;
  position: relative;
  height: 3.45em;
  font-family: "SuiesseInt";
  align-items: baseline;
  padding: 20px 30px 0;
  box-sizing: border-box;
  justify-content: space-between;
  flex-shrink: 0;
}

.header__logo {
  font-size: 1.1em;
  user-select: none;
}

.header__nav {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  margin-right: 6em;
}

.header__lang {
  position: absolute;
  top: 0.85em;
  right: 1.12em;
  display: flex;
  justify-content: space-around;
  align-items: flex-end;
}

.header__link {
  text-decoration: none;
  font-size: .6em;
  padding: .9em 1.12em;
}

.header__link_type_active {
  background-color: #1E1E1E;
  color: #fff;
}

.root {
  display: flex;
  display: -ms-flexbox;
  display: -webkit-flex;
  max-width: 1440px;
  min-width: 320px;;
  margin: 0 auto;
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: greyscale;
  font-family: "SuiesseInt";
  font-size: 24px;
  flex-shrink: 0;
}

.content {
  max-width: 556px;
  margin: 0 auto;
  font-size: 24px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-kerning: normal;
}

.content__title {
  padding-bottom: 2.5em;
  margin: 0 auto;
  font-size: 1em;
  line-height: 1.4em;
  font-weight: lighter;
}

.content__subtitle {
  font-family: "SuiesseInt-Bold";
  line-height: 1.4em;
  font-size: 1em;
  margin: 0 0 1em;
}

.content__paragraph {
  font-size: .6em;
  line-height: 1.4em;
  margin: 0 0 1em;
}

.content__paragraph_type_code {
  font-family: "Menlo";
  font-size: .95em;
}

.content__paragraph_type_last {
  margin: 0 0 2.1em;
}

.content__code {
  line-height: 1.2em;
  font-size: .55em;
  font-family: Menlo, "Ubuntu Mono", Consolas, source-code-pro, monospace;
  margin: 0 0 2.1em;
}

.content__code_type_html {
  width: 102%;
}

.content__list {
  padding-inline-start: 1.1em;
  margin-block-start: 0;
  margin-block-end: 0;
  font-size: .6em;
}

.content__list-items {
  margin: 0 0 1em;
}

.content__button {
  padding: 0;
  color: white;
  background-color: black;
  font-size: 12px;
  text-align: center;
  height: 40px;
  width: 100px;
  margin-bottom: 20px;
  border: none;
  transition: opacity 0.4s ease-in-out;
  cursor: pointer;
}

.content__button:hover {
  opacity: 0.7;
}

.content__result {
  padding: 1.3em 2em;
  display: flex;
  border: 1px solid #DCDCDC;
  box-sizing: border-box;
  border-radius: 5px;
  margin: 0 0 1em;
  font-size: 1.5em;
}

.content__result-text {
  margin: auto;
}

.footer {
  margin: 4em 0 1.5em;
  width: 100%;
  max-width: 2560px;
  font-size: 14px;
  display: flex;
  position: relative;
  font-family: "SuiesseInt";
}

.footer__copyright {
  width: 100%;
  text-align: center;
}
/* 
.hidden {
  display: none;
} */

@media screen and (max-width : 1110px) {
  .header {
    font-size: 20px;
  }

  .header__nav {
    max-width: 560px;
  }

  .footer {
    font-size: 14px;
  }

  .header__logo {
    left: .9em;
  }
}

@media screen and (max-width : 925px) {
  .header__logo {
    left: .4em;
  }
}

@media screen and (max-width : 900px) {
  .header {
    flex-direction: column;
    font-size: 18px;
    align-items: center;
    height: 7.3em;
  }

  .header__logo {
    box-sizing: border-box;
    position: static;
    padding: 1.5em;
    margin-right: 0;
  }

  .header__nav {
    justify-content: center;
    margin-right: 0;
  }

  .content {
    justify-content: end;
    font-size: 20px;
  }

  .footer {
    font-size: 12px;
  }
}

@media screen and (max-width : 610px) {
  .content {
    width: calc(100% - 100px);
  }

  .header__nav {
    width: 100%;
  }

  .header {
    height: 6.3em;
  }

  .header__logo {
    padding: 1em;
  }

  .header__link {
    padding: .9em 1em;
  }

  .content__result {
    font-size: 1em;
  }

  .content__code_type_html {
    width: 90%;
  }
}

@media screen and (max-width : 425px) {
  .header {
    font-size: 14px;
  }

  .header__nav {
    font-size: 14px;
  }

  .content {
    width: calc(100% - 50px);
    font-size: 14px;
  }

  .footer {
    font-size: 10px;
  }
}

@media screen and (max-width : 360px) {
  .header__link {
    padding: .6em .7em;
  }
}