@font-face {
    font-family: 'Inter';
    src: url(https://pictures.s3.yandex.net/frontend-developer/responsive/Inter-Regular.woff);
    font-weight: normal;
  }

  @font-face {
    font-family: 'Inter';
    src: url(https://pictures.s3.yandex.net/frontend-developer/responsive/Inter-Bold.woff2);
    font-weight: bold;
  }

  /* это не совсем по БЭМ, но в учебном проекте допустимо.
  В реальных условиях пишите margin: 0; внутри блоков */

  h1, h2, h3, h4, h5, h6, p, li {
    margin: 0;
  }

  body {
    background-color: #000000;
  }

  .page {
    margin: auto;
    font-family: 'Inter';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
  }

  .header {
    background-color: #000000;
  }

  .header__container {
    width: 90%;
    margin: auto;
    display: flex;
    align-items: center;
    height: 60px;
  }

  .header__title {
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: bold;
  }

  .cover {
    min-height: calc(60vh - 60px);
    background-image: url(https://pictures.s3.yandex.net/frontend-developer/responsive/cover.png);
    background-size: cover;
    background-position: center;
    color: #ffffff;
    box-sizing: border-box;
    padding: 161px 0 98px;
  }

  .cover__container {
    width: 90%;
    margin: auto;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 12px; 

  }

  .cover__title {
    font-size: 3rem;
    line-height: 1;
    max-width: 849px;
  }

  .cover__subtitle {
    font-size: 1rem;
    max-width: 610px;
    margin-top: 50px;
    line-height: 1.5;
  }

  .content {
    padding: 60px 0;
    background-color: #fff;
  }

  .content__columns {
    display: flex;
    flex-direction: column;
    width: 90%;
    margin: auto;
    flex-wrap: wrap;
    row-gap: 60px;
  }

  .content__column {
    width: 100%;
  }

  .content__column-image {
    width: 100%;
    padding-bottom: 100%;
    background-size: cover;
    background-position: center;
  }

  .content__column-image_hero_laika {
    background-image: url(https://pictures.s3.yandex.net/frontend-developer/responsive/laika.png);
  }

  .content__column-image_hero_lunohod {
    background-image: url(https://pictures.s3.yandex.net/frontend-developer/responsive/lunohod.jpg);
  }

  .content__column-image_hero_tesla {
    background-image: url(https://pictures.s3.yandex.net/frontend-developer/responsive/tesla.png);
  }

  .content__column-title {
    font-size: 2em;
    margin: 37px 0 34px;
  }

  .column__text {
    margin: 24px 0;
    font-size: 0.8em;
    line-height: 1.5;
  }

  .column__quote {
    font-size: 1.1em;
    line-height: 1.5;
    margin-left: 0;
  }

  .column__quote-cite {
    font-size: 0.8em;
    line-height: 1.5;
  }

  .share {
    display: flex;
    align-items: center;
    margin-top: 34px;
  }

  .share__text {
    font-weight: bold;
    font-size: 1.2em;
    line-height: 1.2;
    margin-right: 14px;
  }

  .share__icon {
    text-decoration: none;
    display: block;
    margin-right: 6px;
  }

  .share__icon:last-of-type {
    margin-right: 0;
  }

  .share__icon:hover {
    opacity: .8;
  }
  .footer {
    height: 60px;
    background-color: #fff;
  }

  .footer__copyright {
    width: 90%;
    margin: auto;
    font-size: 12px;
    line-height: 18px;
  }

  @media (min-width: 768px) {
    .page {
      max-width: 1440px;
    }
    
    .cover__title{
      font-size: 6rem;
    }

    .content__columns {
      flex-direction: row;
      justify-content: space-between;
    
    }

    .content__column {
    width: calc((100% - 70px)/3);
  }
} 

@supports (backdrop-filter: blur(3px)) {

    .cover__container {
    backdrop-filter: blur(3px);
    }
}

@supports not (row-gap: 60px) {

   .content__column {
    margin-bottom: 60px;
  }
}