stylesheet.css

* {
  box-sizing: border-box;
}

:root {
  font-size: 100%;
  height: 100%;
}

a {
  text-decoration: none;
}

abbr {
  text-decoration: none;
}

body {
  background-color: #FFFFFF;
  display: flex;
  flex-direction: column;
  color: #263238;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  font-size: 0.875rem;
  height: 100%;
  line-height: 1.5rem;
  margin: 0;
}

svg {
  fill: currentColor;
  height: 1.5rem;
  width: 1.5rem;
}

#carbonads {
  height: 100%;
  width: 100%;
}
#carbonads a {
  color: #263238;
}
#carbonads > span {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
}

.carbon-img {
  display: block;
  padding: 1rem 1rem 0.5rem;
}

.carbon-text {
  display: block;
  font-size: 0.75rem;
  line-height: 1rem;
  margin: 0 auto;
  max-width: 15rem;
}

.carbon-poweredby {
  font-size: 0.625rem;
  font-weight: 700;
  line-height: 1.5rem;
  opacity: 0.25;
  text-transform: uppercase;
}

.footer {
  background-color: #EEE;
  margin-top: auto;
  padding: 1.5rem;
}
@media (min-width: 45rem) {
  .footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 3rem;
  }
}
.footer a {
  color: #263238;
  text-decoration: underline;
}
.footer p {
  margin: 0;
  opacity: 0.5;
}
a.share-button {
  background-color: #1DA1F2;
  border-radius: 0.125rem;
  color: #FFF;
  display: block;
  margin: 0.75rem 0 0;
  padding: 0.75rem 1.5rem;
  text-align: center;
  text-decoration: none;
}
@media (min-width: 45rem) {
  a.share-button {
    margin: 0;
  }
}

.hero {
  font-size: 1.5rem;
  line-height: 2rem;
  margin: 0;
  padding: 3rem 1.5rem 1.5rem;
  text-align: center;
}
@media (min-width: 45rem) {
  .hero {
    padding: 4.5rem 3rem 1.5rem;
  }
}

.search {
  display: flex;
  align-items: center;
  margin: 1rem 1.5rem;
  text-align: center;
}
@media (min-width: 45rem) {
  .search {
    margin: 1rem 3rem;
    text-align: left;
  }
}

.search .search__wrapper {
  display: inline-block;
  position: relative;
}
.search .search__close {
  display: none;
  font-size: 1rem;
  padding: 6px 12px;
  position: absolute;
  right: 0;
  top: 1px;
}
.search .search__close span {
  cursor: pointer;
}

.search input {
  color: #333;
  font-size: 1rem;
  padding: 6px 12px;
}
@media (min-width: 45rem) {
  .search input {
    width: 250px;
  }
}

.search--active .search__close {
  display: block;
}
.search--active input {
  padding-right: 32px;
}

.sort-btn {
  cursor: pointer;
  margin-left: .5rem;
  opacity: .5;
}
.sort-btn.active {
  opacity: 1;
}
.sort-btn:first-of-type {
  margin-left: 1rem;
}

.sort-btn:hover {
  opacity: 1;
}
.sort-btn:hover path:first-of-type {
  opacity: 0.8;
}

#sort-color:hover path:nth-of-type(2) {
  fill: #E57373;
}
#sort-color:hover path:nth-of-type(3) {
  fill: #F44336;
}
#sort-color:hover path:nth-of-type(4) {
  fill: #D32F2F;
}
#sort-color:hover path:nth-of-type(5) {
  fill: #B71C1C;
}

#sort-alphabetically:hover path:nth-of-type(2),
#sort-alphabetically:hover path:nth-of-type(3) {
  opacity: 1;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 1.5rem;
  margin-top: 0;
  padding: 0;
}
@media (min-width: 45rem) {
  .grid {
    margin: 3rem;
    margin-top: 0;
  }
}

.grid.search__empty:after {
  content: 'No matching icons found.';
  font-size: 1.25em;
  line-height: 1.5em;
  text-align: center;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

@supports (display: grid) {
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr));
    grid-auto-rows: min-content;
    grid-column-gap: 0.375rem;
    grid-row-gap: 0.375rem;
    grid-auto-flow: dense;
  }
  .grid.search__empty:after {
    grid-column: 1/span 2;
  }

  @media (min-width: 30.75rem) {
    .grid.search__empty:after {
      grid-column: 1/-3;
    }
  }
}

.grid-item {
  background-color: #757575;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem;
  text-align: center;
}
.grid-item--light {
  color: #FFF;
}
.grid-item--dark {
  color: #222;
}
.grid-item__link {
  color: inherit;
}
@supports not (display: grid) {
  .grid-item {
    border: 0.1875rem solid #FFF;
    padding: 0 0 0.75rem;
    width: 20%;
  }
}

.grid-item--ad {
  background-color: #EEE;
  grid-column: -2 / -1;
  grid-row-end: span 2;
  height: auto;
}
@media (min-width: 21.75rem) {
  .grid-item--ad {
    grid-column: -3 / -1;
  }
}
@supports not (display: grid) {
  .grid-item--ad {
    width: 100%;
  }
}

.grid-item__link {
  display: block;
  text-align: center;
  width: 100%;
}

.grid-item__image {
  height: 1.5rem;
  width: 1.5rem;
}

.grid-item__title {
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1rem;
  margin: 0;
}

.grid-item__subtitle {
  font-size: 0.75rem;
  line-height: 1rem;
  margin: 0;
  opacity: 0.5;
}

.navbar {
  background-color: #263238;
}

.navbar__nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}
@media (min-width: 45rem) {
  .navbar__nav {
    padding: 0 1.5rem;
  }
}

.navbar__nav-item a {
  color: #FFF;
  display: block;
  opacity: 0.5;
  padding: 1.5rem 0.375rem;
}
.navbar__nav-item a:focus, .navbar__nav-item a:hover {
  opacity: 1;
}
.navbar__nav-item:last-child a {
  padding: 1.5rem 1.5rem 1.5rem 0.375rem;
}

.navbar__nav-item--home {
  flex-grow: 1;
}
.navbar__nav-item--home a {
  opacity: 1;
  padding: 1.5rem 0 1.5rem 1.5rem;
}

.hidden {
  display: none;
}