style.css

body {
  text-align: center;
  margin: 0;
  font-family: 'Lato', sans-serif;
}



/* General */
strong {
  font-weight: 700;
}

p {
  font-size: 16px;
  line-height: 1.75em;
}

  @media screen and (min-width: 600px) {
    p {
      font-size: 18px;
    }
  }

p + p {
  margin-top: 30px;
}

img, iframe {
  max-width: 100%;
  position: relative;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 30px;
}




/* Header */
header {
  padding: 80px 0 30px;
  position: relative;
}

  @media screen and (min-width: 600px) {
    header {
      padding: 100px 0 60px;
    }
  }

header::before {
  content: "";
  width: 100%;
  position: absolute;
  top: 0;
  display: block;
  height: 30px;
  background-color: #98e433;
}

header::after {
  content: "";
  width: 100%;
  position: absolute;
  top: 0;
  display: block;
  height: 30px;
  background-image: url(image/pattern.jpg);
  opacity: .6;
}



/* Videos */
.videos {
  margin-top: 40px;
}

  @media screen and (min-width: 600px) {
    .videos {
      margin-top: 80px;
    }
  }

iframe {
  width: 320px;
  height: 200px;
}

  @media screen and (min-width: 600px) {
    iframe {
      width:  680px;
      height: 400px;
    }
  }

iframe + iframe {
  margin-top: 20px;
}




/* Contact */
.contact {
  margin-top: 50px;
}

  @media screen and (min-width: 600px) {
    .contact {
      margin-top: 80px;
    }
  }

.link {
  display: block;
  color: #98e433;
}

  .link:last-of-type {
    margin-top: 6px;
  }

.social-media {
  list-style: none;
  margin: 40px 0 0 0;
  padding: 0;
}

.social-media li {
  display: inline-block;
}

.social-media li + li {
  margin-left: 20px;
}

.social-media a {
  display: block;
  height: 50px;
  width: 50px;
  transition: transform 200ms;
}

.social-media a:hover {
  transform: scale(1.1);
}





/* Footer */
footer {
  margin-top: 120px;
  height: 80px;
  background-color: #98e433;
  position: relative;
}

footer::before {
  content: "";
  background-image: url(image/pattern.jpg);
  opacity: .6;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.avatar {
  width: 100px;
  height: 100px;
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
}