/* Start Global Variables */
:root {
  --main-background-color: #f5f6f7;
  --white-background-color: #fff;
  --easy-color: #257953;
  --easy-back-color: #48c78ec0;
  --med-color: #946c00;
  --med-back-color: #ffe08aa8;
  --hard-color: #cc0f35;
  --hard-back-color: #f1466892;
  --text-black-color: #02203c;
  --prog-bar-color: #48c78e;
  --gray-color: #ededed;
  --fav-color: #ffc850;
  --check-color: #34ed43;
  --blue-color: #626ee3;
  --complete-prob-color: #d7e6d7;
  --main-box-shadow: 0 2px 4px rgb(50 50 93 / 10%);
}
/* Start Card */
.prob-card {
  height: 50px;
  width: 100%;
  display: flex;
  align-items: center;
  background-color: var(--white-background-color);
  box-shadow: var(--main-box-shadow);
  border-radius: 4px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  -ms-border-radius: 4px;
  -o-border-radius: 4px;
  color: var(--text-black-color);
  cursor: pointer;
}
.prob-card > * {
  flex: 1;
  display: flex;
  justify-content: center;
}
.prob-card .check-box .cercle {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  -ms-border-radius: 50%;
  -o-border-radius: 50%;
  border: 1px solid rgba(103, 114, 229, 0.3);
  transition: all 0.1s ease;
  -webkit-transition: all 0.1s ease;
  -moz-transition: all 0.1s ease;
  -ms-transition: all 0.1s ease;
  -o-transition: all 0.1s ease;
}
.prob-card .check-box .cercle:hover {
  background-color: var(--check-color);
}
.prob-card .check-box .cercle.active {
  background-color: var(--check-color);
}
.prob-card .prob-title {
  flex: 2;
  font-weight: 600;
  font-size: 16px;
  justify-content: flex-start;
  white-space: nowrap;
  overflow: hidden;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
}
.prob-card .prob-title:hover {
  color: var(--blue-color);
}
.prob-card .prob-title h4 {
  text-overflow: ellipsis;
  overflow: hidden;
}
.prob-card .prob-diff span {
  padding: 5px 10px;
  font-weight: 600;
  font-size: 16px;
  border-radius: 16px;
  -webkit-border-radius: 16px;
  -moz-border-radius: 16px;
  -ms-border-radius: 16px;
  -o-border-radius: 16px;
}
.prob-card.easy .prob-diff span {
  background-color: var(--easy-back-color);
  color: var(--easy-color);
}
.prob-card.medium .prob-diff span {
  background-color: var(--med-back-color);
  color: var(--med-color);
}
.prob-card.hard .prob-diff span {
  background-color: var(--hard-back-color);
  color: var(--hard-color);
}
.prob-card .add-to-fav-btn {
  font-size: 21px;
  transition: all 0.1s ease;
  -webkit-transition: all 0.1s ease;
  -moz-transition: all 0.1s ease;
  -ms-transition: all 0.1s ease;
  -o-transition: all 0.1s ease;
}
.prob-card .add-to-fav-btn:hover {
  color: var(--fav-color);
}
.prob-card .add-to-fav-btn.active {
  color: var(--fav-color);
}
.prob-card .hover-color {
  height: 100%;
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
}
.prob-card.easy .hover-color {
  background-color: rgb(67, 160, 71);
}
.prob-card.medium .hover-color {
  background-color: rgb(239, 108, 0);
}
.prob-card.hard .hover-color {
  background-color: rgb(233, 30, 99);
}
/* End Card */
/* Start Global Rules */
* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}
body {
  font-family: "Barlow", sans-serif;
  overflow-x: hidden;
  background-color: var(--main-background-color);
  height: 100vh;
}
a {
  text-decoration: none;
  color: currentColor;
}
li {
  list-style: none;
  padding: 0;
  margin: 0;
}
/* Start App */
#app {
  padding: 30px;
}
/* End App */
/* Start Header */
header {
  display: flex;
  align-items: center;
  position: relative;
}
header .open-mobile-menu-bar-btn {
  color: var(--blue-color);
  font-size: 35px;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  cursor: pointer;
  display: none;
}
header .open-mobile-menu-bar-btn:hover {
  color: var(--text-black-color);
}
@media (max-width: 767px) {
  header {
    height: 70px;
  }
  header .open-mobile-menu-bar-btn {
    display: block;
  }
}
header .header-contents {
  flex: 1;
  display: flex;
  transition: transform 0.3s ease;
  align-items: center;
  -webkit-transition: transform 0.3s ease;
  -moz-transition: transform 0.3s ease;
  -ms-transition: transform 0.3s ease;
  -o-transition: transform 0.3s ease;
}
header .header-contents .close-mobile-menu-bar-btn {
  position: absolute;
  right: 40px;
  top: 60px;
  color: var(--blue-color);
  font-size: 35px;
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  cursor: pointer;
  display: none;
}
header .header-contents .close-mobile-menu-bar-btn:hover {
  color: var(--white-background-color);
}
@media (max-width: 1280px) {
  header .header-contents {
    flex-direction: column-reverse;
    gap: 10px;
  }
}
@media (min-width: 768px) {
  header .header-contents {
    transform: translateX(0%) !important;
    -webkit-transform: translateX(0%) !important;
    -moz-transform: translateX(0%) !important;
    -ms-transform: translateX(0%) !important;
    -o-transform: translateX(0%) !important;
  }
}
@media (max-width: 767px) {
  header .header-contents {
    position: absolute;
    padding: 15px;
    width: 50vw;
    height: 100vh;
    left: -30px;
    top: -30px;
    z-index: 1000;
    background-color: var(--text-black-color);
    transform: translateX(-100%);
    -webkit-transform: translateX(-100%);
    -moz-transform: translateX(-100%);
    -ms-transform: translateX(-100%);
    -o-transform: translateX(-100%);
  }
  header .header-contents .close-mobile-menu-bar-btn {
    display: block;
  }
}
@media (max-width: 480px) {
  header .header-contents {
    width: 100vw;
  }
}
header .header-contents > * {
  display: flex;
}
header .header-contents .show-groups-btns {
  flex: 1;
  justify-content: flex-end;
  gap: 20px;
}
@media (max-width: 767px) {
  header .header-contents > * {
    flex: 1;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
  }
}
header button {
  position: relative;
  display: block;
  border: none;
  background: none;
  padding: 15px 20px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  color: var(--blue-color);
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
  border-radius: 4px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  -ms-border-radius: 4px;
  -o-border-radius: 4px;
}
header .show-groups-btns button.active {
  background-color: var(--white-background-color);
  box-shadow: var(--main-box-shadow);
  color: var(--text-black-color);
}
header button:hover {
  color: var(--text-black-color);
}
header .pick-rand-btn::before {
  content: "\f074";
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  font-size: 25px;
  position: relative;
  top: 3px;
  margin-right: 10px;
}
header .show-groups-btns button:hover {
  background-color: var(--white-background-color);
  box-shadow: var(--main-box-shadow);
}
@media (max-width: 767px) {
  header .pick-rand-btn:hover {
    color: var(--white-background-color);
  }
  header button {
    width: fit-content;
    margin: 0 auto;
  }
}
/* End Header */
/* Start Progress */
.solving-progress {
  margin: 60px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  color: var(--text-black-color);
}
.solving-progress .progress-title {
  font-size: 30px;
  text-align: center;
}
@media (max-width: 767px) {
  .solving-progress .progress-title {
    font-size: 25px;
  }
}
.solving-progress .progress-container {
  position: relative;
  width: 100%;
  height: 30px;
  border-radius: 6px;
  -webkit-border-radius: 6px;
  -moz-border-radius: 6px;
  -ms-border-radius: 6px;
  -o-border-radius: 6px;
  background-color: var(--gray-color);
  box-shadow: inset 1px 1px 1px 1px hsl(0deg 0% 39% / 20%);
  overflow: hidden;
}
.solving-progress .progress-container .progress-bar {
  width: 0%;
  height: 100%;
  background-color: var(--prog-bar-color);
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
}
.solving-progress .progress-container .progress-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  font-size: 20px;
  font-weight: 600;
}
/* End Progress */
/* Start Main Contents */
.main-contents{
  min-height: 80vh;
}
.main-contents .problmes-groups {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  column-gap: 30px;
  row-gap: 50px;
}
@media (max-width:767px) {
  .main-contents .problmes-groups{
    grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
  }
  
}
.main-contents .problmes-groups.rand,
.main-contents .problmes-groups.fav{
  row-gap: 10px;
}
.main-contents .problmes-groups:not(.active) {
  display: none;
}
.main-contents .problmes-groups .group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.main-contents .problmes-groups .group .group-title {
  text-align: center;
  margin-bottom: 10px;
  font-size: 30px;
  font-weight: bold;
  color: var(--text-black-color);
}
@media (max-width: 767px) {
  .main-contents .problmes-groups .group .group-title{
    font-size: 25px;
  }
}
/* End Main Contents */
/* Start Footer */
.footer{
  text-align: center;
  margin-top: 180px;
  color: var(--text-black-color);
  font-size: 21px;
  line-height: 1.6;
  font-weight: 600;
  padding: 30px 0;
}
.footer .git-link{
  transition: all 0.3s ease;
  -webkit-transition: all 0.3s ease;
  -moz-transition: all 0.3s ease;
  -ms-transition: all 0.3s ease;
  -o-transition: all 0.3s ease;
}
.footer .git-link:hover{
  color: var(--blue-color);

}
/* End Footer */