@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap");
:root {
  /* ====== HEADER-HEIGHT ====== */
  --header-height: 7rem;
  /* ====== COLORS ====== */
  --primary-colors: hsl(174, 26%, 28%);
  --secondary-color: hsl(195, 31%, 49%);
  --neutral-color: hsl(0, 0%, 48%);
  --white-color: hsl(0, 0%, 100%);
  --black-color: hsl(0, 0%, 0%);
  --featured_wrapper_bg: hsl(137, 16%, 31%, 0.08);
  --fade_bg_1: hsl(192, 72%, 72%);
  --fade_bg_2: hsl(137, 52%, 76%);
  /* ====== FONT-WEIGHT ====== */
  --fw-300: 300;
  --fw-400: 400;
  --fw-500: 500;
  --fw-600: 600;
  /* ====== FONT-SIZE ====== */
  --heading-font-size: 3rem;
  --logo-font-size: 2rem;
  --subtext-md: 1.55rem;
  --subtext-sm: 1.35rem;
}


@media screen and (min-width: 991px) {
  :root {
    --heading-font-size: 4.5rem;
    --logo-font-size: 2.5rem;
    --subtext-md: 1.88rem;
    --subtext-sm: 1.65rem;
    --badge-font-size: 1.25rem;
    --nav_links_font-size: 1.75rem;
  }
}
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", sans-serif;
}

/* ===== 1rem = 10px (RESPONSIVE FONT SIZE) ===== */
html {
  font-size: 62.5%;
}

button {
  outline: none;
  border: none;
  cursor: pointer;
}

ul li {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

a {
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  padding: 0;
}

button {
  background-color: transparent;
  outline: none;
  border: none;
}

/*  ===== WIDTH OF SCROLLBAR =====  */
::-webkit-scrollbar {
  width: 7px;
}

/*  ===== BACKGROUND-TRACK  =====  */
::-webkit-scrollbar-track {
  background-color: var(--black-color);
}

/* =====  HANDLE  ===== */
::-webkit-scrollbar-thumb {
  background-color: var(--primary-colors);
}

/* =====  HANDLE-ON-HOVER ===== */
::-webkit-scrollbar-thumb:hover {
  background-color: var(--secondary-color);
}

/* ===== 'stop_scroll' class ADDED ON BODY TO PREVENT SCROLLING OF THE PAGE WHEN THE NAV MENU IS ACTIVE.  ===== */
.stop_scroll {
  overflow-y: hidden;
}

/* ===== CONTAINER ===== */
.container {
  max-width: 130em;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== HEADER ===== */
.header {
  height: var(--header-height);
}
.header .navbar {
  height: inherit;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header .navbar .logo a {
  text-transform: uppercase;
  font-size: var(--logo-font-size);
  font-weight: var(--fw-600);
  color: var(--black-color);
  letter-spacing: 1px;
}
.header .navbar .logo a span {
  color: var(--primary-colors);
}

/* ===== NAV-MENU-LIST ===== */
.nav__menu_list {
  display: flex;
  align-items: center;
  column-gap: 3.3333rem;
  /* ===== NAV-MENU-LIST-ITEM ===== */
  /* ===== LOGIN-BTN ===== */
}
.nav__menu_list .nav_menu_list_item {
  display: inline-block;
  /* ===== NAV-LINK ===== */
}
.nav__menu_list .nav_menu_list_item .nav__link {
  text-transform: capitalize;
  letter-spacing: 0.35px;
  font-size: var(--nav_links_font-size);
  font-weight: var(--fw-400);
  color: var(--neutral-color);
  position: relative;
  padding-bottom: 0.45rem;
}
.nav__menu_list .nav_menu_list_item .nav__link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0;
  background-color: var(--primary-colors);
  transition: width 0.5s ease;
}
.nav__menu_list .nav_menu_list_item .nav__link:hover, .nav__menu_list .nav_menu_list_item .nav__link:hover::before {
  width: 100%;
  color: var(--primary-colors);
}
.nav__menu_list .nav_menu_list_item .nav__link.active {
  color: var(--primary-colors);
  font-weight: var(--fw-600);
}
.nav__menu_list .login__btn {
  background-color: var(--secondary-color);
  opacity: 0.9;
  padding: 0.65rem 3rem;
  font-size: 1.75rem;
  text-transform: capitalize;
  color: var(--white-color);
  font-weight: var(--fw-400);
  transition: transform 0.25s ease;
  border-radius: 2rem;
}
.nav__menu_list .login__btn:hover {
  transform: translateY(-0.25rem);
}

/* ===== MOBILE FIRST NAV MENU ===== */
@media screen and (max-width: 991px) {
  .nav__menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 80%;
    height: 100%;
    z-index: 999;
    background-color: var(--black-color);
    padding: 0 5rem;
    opacity: 0;
    transition: all 0.5s ease;
  }
  .nav__menu .nav__menu_list {
    flex-direction: column;
    align-items: start;
    row-gap: 5rem;
    margin-top: 7rem;
  }
  .nav__menu .nav__menu_list .nav__link {
    font-size: 1.9rem;
    font-weight: var(--fw-500);
    color: #eee;
  }
  .nav__menu .nav__menu_list .nav__link.active {
    color: var(--secondary-color);
  }
  .nav__menu .nav__menu_list .nav__link:hover {
    color: var(--secondary-color);
  }
}
/* ===== SHOW-the-NAV-MENU ===== */
.show {
  right: 0;
  opacity: 1;
}

.polygon_element {
  position: absolute;
  z-index: -1;
  max-width: 60%;
  /* ===== POLYGON-ELEMENT-1 ===== */
}
.polygon_element.element--1 {
  left: 0;
  /* transform: translate(-10rem, -10rem); */
}



.sidebar {
  list-style-type:none;
  left:0;
  top:0;
  text-align:left;
  position: absolute;
  padding: 0;
  list-style: none;
  transition:1s ease;
  margin-top: 60px;
  cursor: pointer;
  font-family: "Inter", sans-serif;
  font-weight: bold;
  margin-left: 30px;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
  padding: 10px;
  width:147px;
}

.sidebar a {
  text-decoration:none;
  color:black;
  transition:1s ease;
  font-size: 17px;
}

.sidebar li {
  text-indent: 20px;
  line-height: 40px;
  transition:0.5s ease;
  margin-top: 20px;
  font-size: var(--nav_links_font-size);
  font-weight: var(--fw-400);
  color: var(--neutral-color);
}


.sidebar li:hover {
  background-color:#777;
  cursor:pointer;
  text-indent: 30px;
}

.sidebar > .sidebar-brand {
height: 65px;
font-size: 18px;
line-height: 60px;
color:var(--secondary-color);
}

  /* title */
  #lsn-nb{
    text-transform: uppercase;
    font-size: 30px;
    font-weight: var(--fw-600);
    color: var(--secondary-color);
    letter-spacing: 1px;
      margin-top: 10px;
      margin-left: 450px;
      position: absolute;
      top: 100px;
    
  }
   #lsn-title{
  font-size: 3.5rem; 
  color: var(--black-color);
  margin-left: 450px;
  position: absolute;
  top: 160px;
  } 
  
  #rbt-img1{
    margin-top: 50px;
      height:250px;
      margin-left: 180px;
      position: relative;
  }
  
  #text1{
  
     font-size: 2rem; 
    color: var(--black-color);
    width: 50%;
    font-family: "Inter", sans-serif; 
    word-spacing: 2px;
    margin-left: 450px;
    position: absolute;
  top: 230px;
  }
#btn-text{
    position: absolute;
     top:550px;
     left:600px;
    background-color:rgb(160, 147, 231);
    color: white;
    padding: 20px;
    margin-top: 100px;
    border-radius: 20px;
    font-size: 25px;
    width: 50%;
    font-family: sans-serif;
}

.img-container{
  display: flex;
}

.img-background{
  margin-left:60px;
  margin-top:45px;
  margin-right:35px;
 width:25%;
 height: 300px;
 background-color: rgb(196, 147, 231);
 border-radius: 20px;
}

.imgs{
  width:100%;
   height:200px;
   margin-top: 55px;
}

.box-container{
  display:flex;
}

.boxs{
  width:25%;
  margin-left:60px;
  margin-top:25px;
  margin-right:35px;
  font-family: serif;
  font-size: 20px;
}
#quiz-btn{
          border: none;
      padding: 15px 32px;
      text-align: center;
      text-decoration: none;
      display: inline-block;
      font-size: 22px;
      border-radius: 40px;
      font-family: sans-serif;
      background-color: hsla(0, 0%, 100%, 0.829);
      color: var(--neutral-color);
      box-shadow: 4px 4px 14px 1px rgba(0, 0, 0, 0.2);
      }.quiz-btn:hover{
        transform: scale(1.025);
}

.quiz-container{
  margin-top: 100px;
  text-align: center;
  font-family: sans-serif;
  margin-top: 25px;
  margin-left: 200px;
  background-color: white;
  border-radius: 10px;
  width:70%;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
  padding: 20px;
  text-align: center;
}
#quiz-exprsn{
  margin-bottom: 30px;
  font-size: 40px ;
  font-family: serif;
  color:rgb(116, 172, 210);
}

#gif{
  width:100px;
  height:150px;
  position: absolute;
  top:1100px;
  left:280px;

}

#pre-game{
  text-align: center;
  margin: 30px;
  margin-top: 100px;
  font-size: 50px;
  font-family: sans-serif;
}
/* game css */
.body-game{
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color:rgb(74, 93, 199);
  flex-direction: column;
  box-sizing: border-box;

}

.game-container{
  position:relative;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 30px;
  background-color: rgb(107, 183, 242);
  padding: 40px 60px ;
}

#game-title{
  font-size: 3em;
  color:white;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

 .reset{
  padding:15px 20px;
  background-color:white;
  border:none;
  font-size: 1.5em;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor:pointer;
  font-weight: 600;
  position: absolute;
 top:490px;
  left: 150px;
  
  
}
.reset:focus{
  color:#fff;
  background:rgb(74, 93, 199);
} 

.game{
  width: 440px;
  height:500px;
  display: flex;
  flex-wrap:wrap;
  gap:10px;
  transform-style: preserve-3d;
  perspective: 500px;
}

.item{
  position: relative;
  width: 100px;
  height: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3em;
background-color: white;
transition: 0.25s;
transform: rotateY(180deg);
}

.item.boxOpen{
  transform: rotateY(0deg);
}

.item::after{
  content: " ";
  position: absolute;
  inset:0;
  background:rgb(138, 193, 234) ;
  /* opacity: 0.85; */
  transition: 0.25s;
  transform: rotateY(0deg);
  backface-visibility: hidden;
}

.boxOpen:after,
.boxMatch:after{
transform: rotateY(180deg);
}

#nxt-btn{
  background-color: hsla(0, 0%, 100%, 0.829);
  align-items: center;
  justify-content: center;
  column-gap: 1rem;
  padding: 0.88rem 1rem;
  width: fit-content;
  font-weight: var(--fw-500);
  text-transform: capitalize;
  border-radius: 2.2rem;
  box-shadow: 4px 4px 14px 1px rgba(0, 0, 0, 0.2);
  transition: transform 0.4s ease;
  color: var(--neutral-color);
  display: center;
  margin-left: 570px;
  font-size: x-large;
  margin-top: 50px;
  }
  #nxt-btn:hover{
    transform: scale(1.025);
  }

  #section1{
    margin-left: 70px;
    margin-top: 50px;
  }

  #section2{
    margin: 50px;
    margin-top: 100px;
  }