*, *::before, *::after {
  box-sizing: border-box;
  font-family: Roboto, Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
}

.video-section {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 3rem 1rem;
  padding: 3rem 0;
  margin: 0 1.5rem;
  border-top: 4px solid #CCC;
}

.video-section:first-child {
  border-top: none;
}

.video-container {
  display: flex;
  flex-direction: column;
}

.thumbnail {
  position: relative;
  display: flex;
}

.thumbnail::before {
  content: attr(data-duration);
  position: absolute;
  background-color: rgba(0, 0, 0, .85);
  color: white;
  right: 5px;
  bottom: 5px;
  padding: .1em .3em;
  border-radius: .3em;
  font-size: .9rem;
}

.thumbnail-image {
  width: 100%;
  height: 100%;
  min-width: 250px;
  min-height: 150px;
  background-color: #AAA;
}

.video-bottom-section {
  display: flex;
  align-items: flex-start;
  margin-top: 1rem;
}

.channel-icon {
  margin-right: .75rem;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  background-color: #AAA;
}

.video-details {
  display: flex;
  flex-direction: column;
}

.video-title {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: .5rem;
  text-decoration: none;
  color: black;
}

.video-channel-name {
  margin-bottom: .1rem;
  text-decoration: none;
  transition: color 150ms;
}

.video-channel-name:hover {
  color: #111;
}

.video-channel-name,
.video-metadata {
  color: #555;
}

.video-section-title {
  grid-column: 1 / -1;
  margin: -.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 .5rem;
}

.video-section-title-close {
  border: none;
  background: none;
  padding: 0;
  font-size: 2rem;
  color: #555;
  cursor: pointer;
}

.videos {
  background-color: #F9F9F9;
}

.categories {
  padding: 1rem 2rem;
  border-top: 1px solid #999;
  border-bottom: 1px solid #999;
}

.category-section {
  display: flex;
  overflow: hidden;
}

.category {
  margin-right: 1rem;
  word-wrap: none;
  white-space: nowrap;
  border: 1px solid #CCC;
  border-radius: 900px;
  background-color: #E7E7E7;
  padding: .5rem 1rem;
  font-size: inherit;
  cursor: pointer;
  transition: background-color 150ms;
}

.category:hover {
  background-color: #DDD;
}

.category.active {
  background-color: #606060;
  color: white;
  border-color: #EEE;
}

.category:last-child {
  margin-right: 0;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

.youtube-logo {
  height: 20px;
}

.search-bar {
  display: flex;
  flex-grow: 1;
  margin: 0 2rem 0 4rem;
}

.search-input {
  width: 100%;
  font-size: inherit;
  padding: .4em;
  border: 1px solid #777;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.search-btn {
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  border: 1px solid #777;
  background-color: #F8F8F8;
  border-left: none;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  cursor: pointer;
}

.search-btn:hover {
  background-color: #F0F0F0;
}

.menu-icons {
  display: grid;
  grid-template-columns: repeat(4, auto);
  align-items: center;
  gap: 1.5rem;
}

.menu-channel-icon {
  border-radius: 50%;
  width: 36px;
  height: 36px;
  background-color: #AAA;
}