* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Colors */
:root {
  --color-primary-strong-cyan: hsl(171, 66%, 44%);
  --color-primary-light-blue: hsl(233, 100%, 69%);
  --color-primary-dark-grayish-blue: hsl(210, 10%, 33%);
  --color-primary-grayish-blue: hsl(201, 11%, 66%);
  --color-very-light-grayish-blue-footer: hsl(210, 17%, 96%);
  --color-white: hsla(0, 0%, 100%, 1);
}

body {
  font-family: "Bai Jamjuree", sans-serif;
  font-size: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 6rem 2rem 4rem;
  width: 100%;
  background-image: url(./images/bg-header-mobile.png);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100%;
  padding: 1rem;
}

h2,
h3 {
  font-weight: 600;
  text-align: center;
  color: var(--color-primary-dark-grayish-blue);
}

h2 {
  font-size: 1.6rem;
  line-height: 1.9rem;
  letter-spacing: -0.46px;
  text-align: center;
  padding: 1rem 2rem;
}

h3 {
  font-size: 1.3rem;
  line-height: 1.67rem;
  letter-spacing: -0.39px;
}

p {
  font-size: 0.9rem;
  line-height: 1.4rem;
  letter-spacing: 0.12px;
  color: var(--color-primary-grayish-blue);
  margin-bottom: 1rem;
  text-align: center;
}

.intro {
  text-align: center;
  margin-bottom: 1rem;
}

.intro h1 {
  font-weight: 600;
  font-size: 1.8rem;
  line-height: 2.2rem;
  letter-spacing: -0.52px;
  color: var(--color-primary-dark-grayish-blue);
  margin: 1rem;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 1rem;
  margin-bottom: 1rem;
  gap: 1rem;
}

.download-buttons .button {
  display: inline-block;
  width: 100%;
  padding: 0.8rem 2rem;
  border-radius: 2rem;
  border: none;
  outline: none;
  color: var(--color-white);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.67rem;
  letter-spacing: 0.5px;
  text-decoration: none;
  transition: background-color 0.3s ease, color 0.3s ease;
  text-align: center;
  cursor: pointer;
}

.download-buttons .button:hover {
  opacity: 0.7;
}

.download-buttons .ios {
  background-color: var(--color-primary-strong-cyan);
  box-shadow: 0.2rem 0.2rem 0.6rem var(--color-primary-strong-cyan);
}

.download-buttons .mac {
  background-color: var(--color-primary-light-blue);
  box-shadow: 0.2rem 0.2rem 0.6rem var(--color-primary-light-blue);
}

.features {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100%;
  padding: 2rem;
  margin: 4rem 0rem;
}

.features img {
  width: 100%;
  max-width: 250px;
  margin-bottom: 1rem;
}

.access-clipboard {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100%;
  gap: 1rem;
  text-align: center;
  margin-bottom: 4rem;
}

.access-clipboard img {
  max-width: 100%;
  margin-bottom: 1rem;
}

.access-clipboard p {
  padding: 0 2rem 2rem;
}

.company-icons > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  gap: 2rem;
  margin-bottom: 4rem;
}

.company-icons > div img {
  max-width: 100px;
}

footer {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100%;
  padding: 1rem 2rem;
  background-color: var(--color-very-light-grayish-blue-footer);
  color: var(--color-primary-grayish-blue);
  text-align: center;
  gap: 1rem;
}

footer ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

footer ul li {
  margin-bottom: 2rem;
}
footer ul li a {
  color: var(--color-primary-dark-grayish-blue);
  text-decoration: none;
  transition: color 0.3s ease;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.67rem;
  letter-spacing: 0.14px;
  text-align: center;
}
footer ul li a:hover {
  color: var(--color-primary-strong-cyan);
}

footer > img {
  width: 55px;
  height: 55px;
  margin: 2rem 0;
}

footer .social-media {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
}
.social-media a svg {
  width: 24px;
  height: 24px;
  fill: var(--color-primary-dark-grayish-blue);
}
.social-media a:hover svg {
  fill: var(--color-primary-strong-cyan);
}

/*Media Queries */

@media (min-width: 768px) {
  body {
    font-size: 20px;
  }

  header {
    background-image: url(./images/bg-header-desktop.png);
  }

  h2 {
    font-size: 2.2rem;
    line-height: 2.5rem;
    letter-spacing: -0.64px;
  }

  h3 {
    font-size: 1.6rem;
    line-height: 2rem;
    letter-spacing: -0.46px;
  }

  p {
    font-size: 1.2rem;
    line-height: 1.7rem;
    letter-spacing: 0.24px;
  }

  .intro {
    max-width: 700px;
  }

  .download-buttons {
    flex-direction: row;
    justify-content: space-between;
    padding: 1rem 6rem;
  }

  .features > div:last-child {
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    text-align: left;
    gap: 2rem;
    margin: 2rem 0;
    position: relative;
  }

  .features > div:last-child > div {
    margin-left: 22rem;
  }

  .features > div:last-child > img {
    position: absolute;
    max-width: 26rem;
    top: -3%;
    left: -15%;
  }
  .features .feature-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .features .feature-item p {
    text-align: left;
  }
  .access-clipboard > div:first-child > p {
    max-width: 874px;
  }

  .access-clipboard > div:last-child > div {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    align-items: stretch;
  }
  .access-clipboard .card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
    height: 100%;
  }
  .company-icons > div {
    flex-direction: row;
    justify-content: space-between;
    gap: 3rem;
    margin: 4rem 0;
  }
  .downloads {
    margin: 4rem 0;
    max-width: 740px;
  }
  footer {
    flex-direction: row;
    justify-content: space-around;
  }
  footer nav {
    margin: 0 2rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    text-align: left;
  }
  footer nav li {
    margin-bottom: 0;
    padding: 0;
  }

  @media (min-width: 1200px) {
    .intro {
      max-width: 730px;
    }
    .features > div:first-child {
      max-width: 730px;
    }
    .features > div:last-child > div {
      margin-left: 25rem;
    }
    .features > div:last-child > img {
      position: absolute;
      max-width: 40rem;
      left: -45%;
    }
    .features .feature-item p {
      max-width: 435px;
    }
    .downloads {
      margin: 4rem 9rem;
    }

    footer nav {
      gap: 7rem;
    }
  }
}