* {
  box-sizing: border-box;
}

body {
  background-color: #EAFAF1;
  font-family: 'Roboto', sans-serif;
  font-weight: 300;
  font-size: 16px;
  color: #16A085;
  line-height: 1.7;
}

h1 {
  font-weight: 700;
  line-height: 1.3;
}

h2 {
  font-weight: 600;
  line-height: 1.3;
  font-size: 1.6em;
}

h3 {
  font-weight: 500;
  line-height: 1.3;
  font-size: 1.6em;
}

h4 {
  font-weight: 400;
  line-height: 1.3;
  font-size: 1.6em;
}
h5 {
  font-weight: 300;
  line-height: 1.3;
  font-size: 1.6em;
}

img {
  width: 100%;
}

a {
  color: #74C7F0;
  text-decoration: none;
  font-weight: 500;
  /* No underlining */
}

a:visited {
  color: #76D7C4;
}

a:hover, a:focus {
  color: #76D7C4;
}

a:active {
  color: #76D7C4;
}

.button {
  display: inline-block;
  /* since the <a> tag is inline by default, we need to change this to inline-block, but more on this in the next exercise */
  background-color: #1ABC9C ;
  color: #ffffff !important;
  /* needed to override the default link color */
  font-weight: 400;
  padding: 10px;
  border-radius: 3px;
  border-bottom: 2px solid #994c30;
  /* width of the border, type, color */
  transition: 0.2s opacity;
}

.button:hover, .button:focus {
  opacity: 0.8;
}

.contact .button {
  width: 48%;
  text-align: center;
}

.contact {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1em;
}

.container {
  max-width: 1200px;
  padding: 0 1em;
}

header {
  background-color: #76D7C4;
  border-bottom: 3px solid #4a4a4a;
  padding: 10px 0;
  position: fixed;
  width: 100%;
}

.logo {
  max-width: 50px;
  border-radius: 10em;
  border: 3px solid #0F75BC;
}

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

nav a {
  color: #ffffff;
}

nav a:visited {
  color: #ffffff;
}

nav a:hover, nav a:focus, nav a:active {
  color: #484848;
}

.navtoggle li:not(:last-child) {
  display: none;
}

.navtoggle, .navtoggle.responsive {
  position: relative;
}

.navtoggle li .icon {
  position: absolute;
  right: 0;
  top: 2px;
  font-size: 20px;
}

nav {
    /* margin-top: 10px;
    display: inline-block;*/
  width: 100%;
}

nav > ul {
  list-style-type: none;
  padding: 0;
}

nav > ul {
  /*margin: 1em 0;*/
}

.navtoggle.responsive li  {
  display: block;
}

main {
  padding-top: 82px;
}

.social .fab {
  font-size: 1.5em;
  padding: 0.5em 1em;
}

.social {
  text-align: center;
}

.copy {
  text-align: center;
  font-size: 70%;
}

/* ==============================
Medium devices (640px and larger)
================================= */
@media only screen and (min-width: 640px) {
  header {
    text-align: unset;
    padding: 20px 0 13px;
  }

  nav {
    width: auto;
    float: right;
    margin-top: 16px;
  }

  nav li {
    display: inline-block;
    padding: 0 15px;
  }

  .navtoggle li:not(:last-child) {
    display: inline-block;
  }

  .navtoggle li:last-child {
  display: none;
}

  main {
    padding-top: 95px;
  }

  .col-md-1 {
    width: 8.33%;
  }

  .col-md-2 {
    width: 16.66%;
  }

  .col-md-3 {
    width: 25%;
  }

  .col-md-4 {
    width: 33.33%;
  }

  .col-md-5 {
    width: 41.66%;
  }

  .col-md-6 {
    width: 50%;
  }

  .col-md-7 {
    width: 58.33%;
  }

  .col-md-8 {
    width: 66.66%;
  }

  .col-md-9 {
    width: 75%;
  }

  .col-md-10 {
    width: 83.33%;
  }

  .col-md-11 {
    width: 91.66%;
  }

  .col-md-12 {
    width: 100%;
  }
  [class*="col-"] {
    float: left;
    padding: 15px;
  }
  .row::after {
    content: "";
    clear: both;
    display: table;
  }
.row {
  margin-right: -15px;
  margin-left: -15px;
}

  .container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
  }
  .work h3 {
    margin-top: 0;
      }

      .work h4 {
        margin-top: 0.5em;
        margin-bottom: 0.5em;
          }
.about img {
  max-width: 350px;
}
.about picture {
  display: block;
  text-align: center;

}
}

/* ==============================
Medium devices (1024px and larger)
================================= */
@media only screen and (min-width: 1024px) {
  .col-lg-1 {
    width: 8.33%;
  }

  .col-lg-2 {
    width: 16.66%;
  }

  .col-lg-3 {
    width: 25%;
  }

  .col-lg-4 {
    width: 33.33%;
  }

  .col-lg-5 {
    width: 41.66%;
  }

  .col-lg-6 {
    width: 50%;
  }

  .col-lg-7 {
    width: 58.33%;
  }

  .col-lg-8 {
    width: 66.66%;
  }

  .col-lg-9 {
    width: 75%;
  }

  .col-lg-10 {
    width: 83.33%;
  }

  .col-lg-11 {
    width: 91.66%;
  }

  .col-lg-12 {
    width: 100%;
  }
}

.animation picture {
  display: block;
  text-align: center;

}

@keyframes color-change {
  0% {fill: #edc655;}
  50% {fill: #fcffad;}
  100% {fill: #f76414;}
}

.sun {
  animation: 4s color-change infinite alternate linear;
}

.cloud-front {
  animation: 3s cloud-move infinite alternate linear;
}

.cloud-back {
  animation: 4s cloud-move-reverse infinite alternate linear;
}

@keyframes cloud-move {
  from {transform: translate(0,50px);}
  to {transform: translate(200px,150px);}
}

@keyframes cloud-move-reverse {
  from {transform: translate(446px,48px);}
  to {transform: translate(100px, 48px);}
}