style.css

button,hr,input{overflow:visible}audio,canvas,progress,video{display:inline-block}progress,sub,sup{vertical-align:baseline}html{font-family:sans-serif;line-height:1.15;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0} menu,article,aside,details,footer,header,nav,section{display:block}h1{font-size:2em;margin:.67em 0}figcaption,figure,main{display:block}figure{margin:1em 40px}hr{box-sizing:content-box;height:0}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}a{background-color:transparent;-webkit-text-decoration-skip:objects}a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}dfn{font-style:italic}mark{background-color:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}audio:not([controls]){display:none;height:0}img{border-style:none}svg:not(:root){overflow:hidden}button,input,optgroup,select,textarea{font-family:sans-serif;font-size:100%;line-height:1.15;margin:0}button,input{}button,select{text-transform:none}[type=submit], [type=reset],button,html [type=button]{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:ButtonText dotted 1px}fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}[hidden],template{display:none}/*# sourceMappingURL=normalize.min.css.map */

body {
  font-family: 'Roboto', sans-serif;
  font-weight: 100;
  color: #222;
}

.header {
  background: #222;
  height: 50px;
  color: #ddd;
  padding: 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  -webkit-user-select: none;
  margin-bottom: 10px;
}

.header__title {
  font-weight: 100;
  font-size: 40px;
  margin: 0;
  cursor: default;
}

.header__lections {
  font-weight: 100;
  /*color: #000;*/
}

.header__hower {
  transition: 1s;
  animation-name: koalaTitle;
  animation-duration: 3s;
}


.header__hower:nth-child(1) {
  animation-delay: .2s;
}

.header__hower:nth-child(2) {
  animation-delay: .4s;
}

.header__hower:nth-child(3) {
  animation-delay: .6s;
}

.header__hower:nth-child(4) {
  animation-delay: .8s;
}

.header__hower:nth-child(5) {
  animation-delay: 1s;
}

.header__hower:hover {
  color: #4BBBFA;
}

@keyframes koalaTitle {
  0% {
    color: #ddd;
  }

  50% {
    color: #4BBBFA;
  }

  100% {
    color: #ddd;
  }
}

.navigation {
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.navigation__item {
  margin: 10px;
  color: #ddd;
  text-decoration: none;
  position: relative;
  font-size: 18px;
}

.navigation__item.active:before{
  height: 7px;
}

.navigation__item:before {
  content: "";
  display: block;
  position: absolute;
  bottom: -7px;
  height: 0px;
  width: 100%;
  background: #4BBBFA;
  transition: .2s;
}
.navigation__item:hover:before {
  height: 7px;
}

.navigation__github {
  height: 30px;
  margin: 10px;
  transition: fill .3s;
}

.navigation__github:hover {
  fill: #4BBBFA;
}


.grid {
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
  align-items: stretch;
  -webkit-flex-wrap: wrap;
  -moz-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  -o-flex-wrap: wrap;
  flex-wrap: wrap;
}

.grid__item {
  flex-basis: 100%;
  padding: 15px;
  box-sizing: border-box;
}

@media (min-width: 500px) {
  .grid__item {
    flex-basis: 50%;
  }
}

@media (min-width: 800px) {
  .grid__item {
    flex-basis: 33%;
  }
}


.card {
  width: 100%;
  box-shadow: 0 2px 2px 0 rgba(0,0,0,0.14),0 1px 5px 0 rgba(0,0,0,0.12),0 3px 1px -2px rgba(0,0,0,0.2);
  text-decoration: none;
  color: inherit;
  display: block;
}

.card__header {
  height: 300px;
  position: relative;
}

.card__image {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 90%;
  max-height: 90%;
}

.card__info {
  padding: 10px;
  background-color: #eee;
}

.card__title {
  color: #4BBBFA;
  font-size: 24px;
}

.card__tags {
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-top: 15px;
}

.tag {
  padding: 5px;
  text-decoration: none;
  border-radius: 10px;
  color: #fff;
  margin: 2px;
  font-size: 12px;
}

.tag:nth-child(3n) {
  background: rgb(198, 201, 67);
}

.tag:nth-child(3n+1) {
  background: rgb(128, 224, 254);
}

.tag:nth-child(3n+2) {
  background: rgb(254, 128, 151);
}

.footer {
  background: #222;
  height: 50px;
  color: #ddd;
  padding: 15px;
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.links {
  display: -webkit-flex;
  display: -moz-flex;
  display: -ms-flex;
  display: -o-flex;
  display: flex;
  align-items: flex-start;
}

.links__icon {
  height: 20px;
  padding: 10px;
  fill: #fff;
  transition: .2s;
}

.links__icon:hover {
  fill: #4BBBFA;
}