:root {
  /*==== colors =====*/

  --VeryDarkBlue: hsl(243, 87%, 12%);
  --DesaturatedBlue: hsl(238, 22%, 44%);
  --accentBlue: hsl(224, 93%, 58%);
  --accentCyan: hsl(170, 45%, 43%);
  --LightGrayishBlue: hsl(240, 75%, 98%);
  --LightGray: hsl(0, 0%, 75%);

  --primary: "Open Sans", serif;
  --secondary: "Raleway", serif;
}
/*=== basic configuration ===*/
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  text-decoration: none;
  box-sizing: border-box;
  line-height: 1.1;
  list-style: none;
}
img {
  display: block;
  width: 100%;
}
strong,
span,
button {
  display: block;
}

.desktop {
  display: none;
}
.alertMsg {
  display: none;
}
.form-btn {
  cursor: pointer;
  border: none;
  border-radius: 0.2rem;
  background-color: var(--accentBlue);
  color: #fff;
  padding-block: 0.92em;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--secondary);
}

body {
  font-family: var(--primary);
}

/*navigation */
.navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3.6rem;
  padding-inline: 1.5rem;
}
.navigation-logo-container img {
  width: 5.4rem;
}
.navigation-link-list {
  display: flex;
  gap: 1.25rem;
  padding-block: 1.8rem;
}
.navigation-list-items a {
  color: var(--VeryDarkBlue);
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--secondary);
}
/*first article*/
article:first-of-type {
  margin-bottom: 5rem;
  .article-image-container {
    margin-bottom: 2.95rem;
  }
  .article-content {
    padding-inline: 1.5rem;
    text-align: center;

    .article-heading {
      line-height: 1.45;
      margin-bottom: 1.25rem;
    }
    .article-description {
      font-size: 0.85rem;
      font-weight: 400;
      line-height: 1.55;
      margin-bottom: 1.7rem;
      padding-inline: 1rem;
    }
  }
  /*form container of first article*/
  .form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    .form-input::placeholder {
      font-size: 0.75rem;
      opacity: 55%;
    }
    .form-input {
      border: 2px solid var(--LightGray);
      padding-block: 0.8em;
      padding-inline: 1rem;
      border-radius: 0.3rem;
    }
  }
}
/*second article*/
article:last-of-type {
  background-color: var(--LightGrayishBlue);
  padding-inline: 1.5rem;
  padding-block-end: 5rem;

  .article-image-container {
    padding-block-start: 2.8rem;
    margin-bottom: 6rem;
  }
  .article-content {
    margin-bottom: 2.3rem;
  }
  .article-content .article-heading {
    font-size: 1.04rem;
    font-family: var(--secondary);
    text-align: center;
    margin-bottom: 1.9rem;
  }
  .article-content .article-description {
    color: var(--DesaturatedBlue);
    font-size: 0.88rem;
    line-height: 1.4;
    margin-bottom: 1.25rem;
  }
  .link-container {
    display: flex;
    padding-bottom: 2.5rem;
    justify-content: center;
    gap: 0.3rem;
    .link-wrapper {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      border-bottom: 1.5px solid var(--accentCyan);
      padding-bottom: 0.2rem;
    }
    a {
      display: block;
      color: var(--accentCyan);
      font-size: 0.8rem;
      font-family: var(--secondary);
      font-weight: 500;
    }
    a:hover + img,
    a:focus + img {
      transform: translateX(1rem);
    }

    img {
      position: relative;
      transition: 300ms ease-in-out;
      width: 1.1rem;
      height: 1.1rem;
    }
  }
  /*quote container*/
  .quote-container {
    border-radius: 0.2rem;
    background-color: #fff;
    padding: 1.5rem;
    margin-inline: 1.4rem;

    .quote-image {
      width: 0.78rem;
      height: 0.78rem;
      margin-bottom: 0.4rem;
    }
    .quote-description {
      font-size: 0.645rem;
      font-weight: 500;
      font-family: var(--secondary);
      line-height: 1.6;
      margin-bottom: 1rem;
    }
  }
  .quote-data-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;

    img {
      width: 1.5rem;
      height: 1.5rem;
      border-radius: 50%;
    }
    .user-data-container .user-name {
      font-size: 0.5rem;
      font-weight: 800;
      margin-bottom: 0.4em;
    }
    .user-data-container .user-occupancy {
      font-size: 0.5rem;
      font-weight: 400;
    }
  }
}
/*section*/
.section {
  background-color: var(--DesaturatedBlue);
  padding-inline: 2.5rem;
  padding-block: 1.5rem;
  text-align: center;
  .section-heading {
    color: var(--LightGrayishBlue);
    font-size: 1.15rem;
    font-weight: 600;
    font-family: var(--secondary);
    margin-top: 2rem;
    margin-bottom: 1.2rem;
  }
  .seciton-description {
    color: var(--LightGrayishBlue);
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
    line-height: 1.5;
  }
  .form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 3rem;

    .form-input {
      padding-block: 0.92em;
      font-size: 0.6rem;
      padding-inline: 0.5rem;
    }
    .form-btn {
      padding-block: 0.92em;
      font-size: 0.6rem;
    }
  }
}
/*footer*/
.footer {
  background-color: var(--VeryDarkBlue);
  padding-inline: 2rem;
  padding-block-start: 4.2rem;

  a {
    font-size: 0.98rem;
  }

  .footer-top-section img {
    width: 11rem;
    filter: brightness(0) invert(1);
    padding-block-end: 2.5rem;
  }

  .footer-bottom-section {
    padding-top: 0rem;
    /*1st list*/
    .ul-1 {
      display: flex;
      flex-direction: column;
      gap: 1.4rem;
      margin-bottom: 4rem;

      li {
        display: flex;
        align-items: center;
        gap: 0.85rem;

        img {
          width: 1.2rem;
        }

        a {
          color: var(--LightGrayishBlue);
        }
      }
    }
    .ul-2 {
      display: flex;
      flex-direction: column;
      gap: 1.3rem;
      margin-bottom: 3.3rem;
      a {
        color: var(--LightGrayishBlue);
      }
    }
    .ul-3 {
      display: flex;
      flex-direction: column;
      gap: 1.3rem;
      margin-bottom: 3.3rem;
      a {
        color: var(--LightGrayishBlue);
      }
    }
  }
  .social-media-list {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 2.8rem;
    gap: 0.7rem;
    svg {
      width: 1.7rem;
      height: auto;
    }
    li:last-of-type a svg {
      border: 1px solid white;
      border-radius: 50%;
      padding: 0.2rem;
    }
  }
}

@media screen and (min-width: 1440px) {
  .desktop {
    display: block;
  }
  .mobile {
    display: none;
  }
  /*navigation */
  .navigation {
    margin-bottom: 1.15rem;
    padding-inline: 5rem;
    padding-block: 3.2rem;
  }
  .navigation-logo-container img {
    width: 9.9rem;
  }
  .navigation-link-list {
    gap: 3.5rem;
    padding-block: 1.8rem;
  }
  .navigation-list-items a {
    font-size: 1rem;
  }

  /*first article*/
  article:first-of-type {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    gap: 6rem;
    padding-inline: 5rem;
    margin-bottom: 13rem;
    .article-image-container {
      order: 1;
      margin-bottom: 0rem;
    }
    .article-content {
      padding-inline: 0;
      text-align: start;

      .article-heading {
        line-height: 1.5;
        font-size: 2.5rem;
        font-family: var(--secondary);
        margin-bottom: 0.9rem;
      }
      .article-description {
        font-size: 1.1rem;
        font-weight: 400;
        line-height: 1.4;
        margin-bottom: 1.5rem;
        padding-inline: 0;
      }
    }
    /*form container of first article*/
    .form {
      flex-direction: row;
      align-items: center;
      gap: 0.8rem;
      max-width: 90%;
      .form-input::placeholder {
        font-size: 0.85rem;
        opacity: 55%;
      }
      .form-input {
        flex: 1;
        border: 1px solid black;
        padding-block: 0.87rem;
        padding-inline: 1rem;
      }
      .form-btn {
        padding-block: 0.87rem;
        font-size: 0.92rem;
        padding-inline: 3.8rem;
      }
    }
  }

  /*second article*/
  article:last-of-type {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 1rem;
    padding-inline: 5rem;
    padding-block-end: 0rem;
    padding-block-start: 4rem;

    .article-image-container {
      margin-top: 0.7rem;
      padding-block-start: 0;
      margin-bottom: 0;
      order: 2;
    }

    .article-content {
      margin-bottom: 6.7rem;
    }
    .article-content .article-heading {
      font-size: 2.5rem;
      text-align: start;
      margin-bottom: 2.5rem;
    }
    .article-content .article-description {
      color: var(--VeryDarkBlue);
      font-size: 1rem;
      font-weight: 500;
      line-height: 1.45;
      margin-bottom: 1.05rem;
      max-width: 34rem;
    }
    .link-container {
      padding-top: 0.2rem;
      padding-bottom: 2.8rem;
      justify-content: flex-start;
      gap: 0.3rem;
      .link-wrapper {
        gap: 0.3rem;
        padding-bottom: 0.3rem;
      }
      a {
        font-size: 1.04rem;
        font-weight: 500;
      }
      a:hover + img,
      a:focus + img {
        transform: translateX(1rem);
      }

      img {
        position: relative;
        transition: 300ms ease-in-out;
        width: 1.1rem;
        height: 1.1rem;
      }
    }
    /*quote container*/
    .quote-container {
      border-radius: 0.2rem;
      background-color: #fff;
      padding-block: 1.55rem;
      padding-inline: 1.8rem;
      margin-inline: 0;
      max-width: 22.1rem;

      .quote-image {
        width: 0.9rem;
        height: 1.03rem;
        margin-bottom: 0.6rem;
      }
      .quote-description {
        font-size: 0.89rem;
        font-weight: 500;
        font-family: var(--secondary);
        line-height: 1.6;
        margin-bottom: 1rem;
      }
    }
    .quote-data-wrapper {
      gap: 0.5rem;
      img {
        width: 2rem;
        height: 2rem;
      }
      .user-data-container .user-name {
        font-size: 0.68rem;
        font-weight: 700;
        margin-bottom: 0.4em;
      }
      .user-data-container .user-occupancy {
        font-size: 0.6rem;
        font-weight: 400;
      }
    }
  }
  /*section*/
  .section {
    padding-inline: 5rem;
    padding-block-start: 6rem;
    padding-block-end: 5.4rem;
    text-align: start;
    display: grid;
    align-items: center;
    gap: 10rem;
    grid-template-columns: repeat(2, 1fr);
    .section-heading {
      font-size: 2rem;
      margin-top: 0.623rem;
      margin-bottom: 1.4rem;
    }
    .seciton-description {
      font-size: 1rem;
      margin-bottom: 0;
      line-height: 1.5;
      padding-inline-end: 4rem;
    }
    .form-wrapper {
      padding-inline-start: 2rem;
      padding-inline-end: 3.5rem;
    }
    .form {
      display: flex;
      flex-direction: column;
      align-items: start;
      gap: 1rem;
      margin-bottom: 0rem;

      .form-input::placeholder {
        font-size: 0.8rem;
      }
      .input-wrapper {
        min-width: 100%;
      }
      .form-input {
        width: 100%;
        padding-block: 1.05rem;
        font-size: 0.6rem;
        padding-inline: 0.5rem;
      }
      .form-btn {
        padding-block-start: 1.05rem;
        padding-block-end: 0.9rem;
        padding-inline: 1.9rem;
        font-size: 0.93rem;
      }
    }
  }

  /*footer*/
  .footer {
    display: grid;
    grid-template-rows: auto auto;
    padding-inline: 5rem;
    padding-block-start: 4.4rem;
    padding-block-end: 1rem;

    a {
      font-size: 0.98rem;
    }
    .footer-top-section {
      padding-block-start: 2.5rem;
    }
    .footer-top-section img {
      width: 11rem;
      filter: brightness(0) invert(1);
      padding-block-end: 1.65rem;
    }

    .footer-bottom-section {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr 1fr;
      gap: 0rem;
      padding-top: 0rem;
      .ul-1 {
        margin-right: 5rem;
      }
      .ul-2 {
        place-self: center;
      }
      .ul-3 {
        padding-left: 4.39rem;
      }
    }
    .social-media-list {
      margin-left: 1.4rem;
      align-items: start;
      justify-content: start;
      padding-bottom: 2.8rem;
      gap: 0.7rem;
      svg {
        width: 1.9rem;
        height: auto;
      }
      li:last-of-type a svg {
        border: 1px solid white;
        border-radius: 50%;
        padding: 0.2rem;
      }
    }
  }
}