:root {
  --background-color: #fff;
  --font-color: #6A7480;
  --bar-color: #F2F3F5;
  --border-color: #E3E5E8;
  --github-color: #6A7480;
  --github-hover-color: #2E3338;
  --active-color: #D4D7DD;
  --active-font-color: #2E3338;
  --hover-color: #E8EAED;
}


* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  list-style: none;
  transition: 0.3s;
}

html {
  overflow-x: hidden;
  margin-right: calc(-1 * (100vw - 100%));
}

body {
  background-color: var(--background-color);
  font-family: 'Roboto', sans-serif;
  color: var(--font-color);
  font-size: 16px;
}

/* Container */
.container {
  display: flex;
  max-width: 1640px;
  min-height: calc(100vh - 60px);
}

.card-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: flex-start;
  align-self: flex-start;
  gap: 10px;
  max-width: 1480px;
  margin: 0 auto;
  padding: 20px;
  padding-top: 35px;
}

/* Tab */
.tab {
  display: flex;
}

.tab-list {
  display: flex;
  width: calc(100vw - 170px);
  flex-wrap: wrap;
  background-color: var(--bar-color);
}

.logo {
  display: block;
  width: 160px;
  min-width: 160px;
  min-height: 60px;
  background-color: var(--bar-color);
  background-image: url('assets/svg/rss-logo.png');
  background-size: 111px 40px;
  background-repeat: no-repeat;
  background-position: 15px center;
}

.tab-item {
  display: flex;
  min-height: 60px;
  flex-grow: 1;  
  min-width: max-content;
}

.tab-link {
  display: block;
  width: 100%;
  height: 100%;
  padding: 10px;
  line-height: 40px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  white-space: nowrap;
}

/* Sidebar */
.sidebar-list {
  height: 100%;
  background-color: var(--bar-color);
}

.sidebar-item a {
  display: block;
  width: 160px;
  min-height: 65px;
  padding: 10px 5px 10px 15px;
  line-height: 45px;
  color: var(--font-color);
  text-decoration: none;
  cursor: pointer;
}

/* Card */
.card {
  display: block;
  width: 320px;
  height: 240px;
  margin-bottom: 35px;
  background-color: var(--background-color);
  border: 1px solid var(--bar-color);
  border-radius: 2px;
  overflow: hidden;
  text-decoration: none;
}

.card:hover {
  border: 1px solid var(--border-color);
}

.card-description {
  display: flex;
  justify-content: space-between;
  width: 320px;
  height: 60px;
  padding: 20px 10px 10px;
  background-color: var(--bar-color);
}

.github {
  display: block;
  font-size: 12px;
  line-height: 30px;
  padding-left: 30px;
  background-image: url('assets/svg/github.svg');
  background-size: 20px;
  background-repeat: no-repeat;
  background-position: left center;
  text-decoration: none;
  color: var(--github-color);
  cursor: pointer;
}

.card:hover .github {
  color: var(--github-hover-color);
}

.card-image {
  position: relative;
  width: 320px;
  height: 180px;
  background-size: 103% 100%;
  background-position: center top;
  transition: 0.75s;
  cursor: pointer;
}

.card:hover .card-image {
  filter: brightness(0.85) contrast(1.2);
  background-size: 113% 110%;
}

/* Skills */
.skill {
  display: flex;
}

.html,
.css,
.js,
.sass,
.react,
.en,
.node {
  height: 16px;
  line-height: 16px;
  font-size: 12px;
  padding: 0 10px;
  margin-left: 5px;
  margin-top: 7px;
  border-radius: 8px;
  color: #fff;
}

.html {
  background-color: #E74C3C;
}

.css {
  background-color: #206694;
}

.js {
  background-color: #F1C40F;
  font-weight: 400;
}

.sass {
  background-color: #9B59B6;
}

.react {
  background-color: #3498DB;
  font-weight: 400;
}

.en {
  background-color: #002379;
}

.node {
  background-color: #2ECC71;
}

.sidebar-item.active,
.tab-item.active,
.tab-link.active {
  background-color: var(--active-color);
  color: var(--active-font-color);
}

.sidebar-item:hover,
.tab-item:hover {
  background-color: var(--hover-color);
}

.dark-mode {
  position: fixed;
  right: 0px;
  bottom: 0px;
  width: 64px;
  height: 64px;
  border: 0;
  outline: 0;
  cursor: pointer;
  background-color: transparent;
  background-image: url("assets/svg/dark-mode.png");
  background-size: 32px;
  background-position: center;
  background-repeat: no-repeat;
}

/* Dark theme */
.logo.dark {
  background-image: url('assets/svg/rss-logo-white.png');
}

.dark-mode.dark {
  background-image: url("assets/svg/dark-mode-white.png");
}

.github.dark {
  background-image: url('assets/svg/github-white.svg');
}