.button {
  font-size: 2em;
  font-family: "PT Sans", sans-serif;
  border: 2px gray solid;
  border-radius: 10px;
  background-color: transparent;
  color: dimgray;
  padding: 5px 15px;
  text-decoration: none;
  opacity: 0;
  transition: opacity 1s, border 0.4s, background 0.3s, font-size 0.3s,
    padding 0.1s, box-shadow 0.2s;
  -webkit-transition: opacity 1s, border 0.4s, background 0.3s, font-size 0.3s,
    padding 0.1s, box-shadow 0.2s;
  -moz-transition: opacity 1s, border 0.4s, background 0.3s, font-size 0.3s,
    padding 0.1s, box-shadow 0.2s;
  -ms-transition: opacity 1s, border 0.4s, background 0.3s, font-size 0.3s,
    padding 0.1s, box-shadow 0.2s;
}

.button:hover {
  font-size: 2.1em;
  padding: 7px 17px;
  border: 2px darkorange solid;
  color: white;
  text-decoration: none;
  background-color: darkorange;
  box-shadow: 0 0 10px #666;
}

#subtitle {
  opacity: 0;
  transition: opacity 1s;
  -webkit-transition: opacity 1s;
  -moz-transition: opacity 1s;
  -ms-transition: opacity 1s;
}

#topbar {
  background-color: rgba(18, 7, 3, 0.9);
  opacity: 0;
  visibility: hidden;
  position: fixed;
  transition: opacity 0.4s;
  -webkit-transition: opacity 0.4s;
  -moz-transition: opacity 0.4s;
  -ms-transition: opacity 0.4s;
  width: 100%;
  z-index: 99;
}

#topbar .title {
  font-family: "Lobster", cursive;
  color: white;
}

#title {
  height: 900px;
  background-image: url(../img/top.jpg);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

.typewriter h1 {
  font-family: "Roboto Mono", monospace;
  font-size: 10vw;
  color: #222;
  overflow: hidden;
  border-right: 0.12em solid orange;
  white-space: nowrap;
  margin: 0 auto;
  animation: typing 2s steps(27, end), caret 0.7s steps(1) infinite;
  -webkit-animation: typing 2s steps(27, end), caret 0.7s steps(1) infinite;
  -moz-animation: typing 2s steps(27, end), caret 0.7s steps(1) infinite;
  -ms-animation: typing 2s steps(27, end), caret 0.7s steps(1) infinite;
}

#intro-content {
  padding: 45px 100px;
  font-family: "Comfortaa", cursive;
  font-size: 1.5em;
}

.card {
  font-family: "Comfortaa", cursive;
  text-align: center;
  margin-bottom: 30px;
  border-radius: 3%;
  transition: 0.2s;
  padding: 0px 15px;
}

.card:hover {
  box-shadow: 0px 0px 8px #aaaabb;
}

.card h4 {
  font-size: 1.25em;
}

.card-img-top {
  padding: 20px 0px;
  width: 100%;
  height: auto;
}

.card .card-title {
  hyphens: auto;
  overflow-wrap: break-word;
}

@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes caret {
  50% {
    border-color: transparent;
  }
}

#contacts-bottom a {
  text-decoration: none;
}
#contacts-bottom img {
  margin: 5px;
  width: 60px;
  transition: 0.3s;
  -webkit-transition: 0.3s;
  -moz-transition: 0.3s;
  -ms-transition: 0.3s;
}
#contacts-bottom img:hover {
  transform: scale(1.125, 1.125);
  -webkit-transform: scale(1.125, 1.125);
  -moz-transform: scale(1.125, 1.125);
  -ms-transform: scale(1.125, 1.125);
}

#who-am-i {
  background-image: url("../img/gray.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  text-shadow: #aaa 2px 2px 5px;
  -webkit-text-shadow: #aaa 2px 2px 5px;
  -moz-text-shadow: #aaa 2px 2px 5px;
  -ms-text-shadow: #aaa 2px 2px 5px;
}
#who-am-i img {
  border-radius: 50%;
  box-shadow: #888 0px 3px 10px;
  -webkit-box-shadow: #888 0px 3px 10px;
  -moz-box-shadow: #888 0px 3px 10px;
  -ms-box-shadow: #888 0px 3px 10px;
  transition: 0.3s;
  -webkit-transition: 0.3s;
  -moz-transition: 0.3s;
  -ms-transition: 0.3s;
}
#who-am-i img:hover {
  box-shadow: #666 4px 2px 20px;
  -webkit-box-shadow: #666 4px 2px 20px;
  -moz-box-shadow: #666 4px 2px 20px;
  -ms-box-shadow: #666 4px 2px 20px;
  transform: rotateZ(10deg) translate(40px, 0px);
}
.icon-scroll,
.icon-scroll:before {
  position: inherit;
  left: 50%;
  display: block;
}

.icon-scroll {
  width: 30px;
  height: 52px;
  margin-top: 25px;
  margin-bottom: 25px;
  box-shadow: inset 0 0 0 1px #292929;
  -webkit-box-shadow: inset 0 0 0 1px #292929;
  -moz-box-shadow: inset 0 0 0 1px #292929;
  -ms-box-shadow: inset 0 0 0 1px #292929;
  border-radius: 25px;
}

.icon-scroll:before {
  content: "";
  width: 8px;
  height: 8px;
  background: #292929;
  margin-left: -4px;
  top: 8px;
  border-radius: 4px;
  animation-duration: 1.5s;
  animation-iteration-count: infinite;
  animation-name: scroll;
}

@keyframes scroll {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(30px);
    -webkit-transform: translateY(30px);
    -moz-transform: translateY(30px);
    -ms-transform: translateY(30px);
  }
}
#education {
  width: 100%;
  background-image: url("../img/educations/edu-bg.png");
  background-repeat: no-repeat;
  background-position: right;
  background-size: auto 230%;
  background-attachment: fixed;
}
#edu-quote {
  margin: 200px 20% 100px 20%;
  font-size: 2em;
}

#knowledge .row {
  width: 70%; 
  margin: 20px auto;
}

#showcase {
}

#footer1 {
  background-color: hsla(190,100%,5%,0.6);
  height: 25px;
  color: white;
  text-align: center;
  font-family: 'Comfortaa', cursive;
}

#footer2 {
  background-color: hsla(190,100%,5%,0.6);
  height: 50px;
  color: white;
  text-align: center;
  font-family: 'Comfortaa', cursive;
  display: none;
}

@media (max-width: 1200px) {
  #intro-content {
    padding: 45px 30px;
    font-size: 1.3em;
  }

  #knowledge .row {
    width: 80%; 
    margin: 20px auto;
  }
}
@media (max-width: 990px) {
  .button {
    font-size: 1.5em;
  }
  #hello #firstbutton-wrapper {
    margin-top: 30px;
  }
  #edu-quote {
    margin: 200px 10% 100px 10%;
  }
  #intro-title {
    text-align: center;
  }
  #intro-content {
    padding: 35px 30px;
    font-size: 1.2em;
  }

  #knowledge .row {
    width: 90%; 
    margin: 20px auto;
  }
}

@media (max-width: 767px) {
  #knowledge .row {
    width: 95%; 
    margin: 20px auto;
  }
}

@media (max-width: 575px) {
  #footer1 {
    display: none;
  }
  
  #footer2 {
    display: block;
  }
}

@media (max-width: 500px) {
  #hello #firstbutton-wrapper {
    margin-top: 50px;
  }
  #edu-quote {
    margin: 200px 2% 100px 2%;
    font-size: 1.5em;
  }
  #intro-content {
    padding: 30px 0px;
    font-size: 1.125em;
  }
  #knowledge-title {
    font-size: 1.8em;
  }
}