@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: 120em;
  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); */
}

  /* 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: 120px;
      position: relative;
  }
  
  #text1{
  
     font-size: 2rem; 
    color: var(--black-color);
    width: 50%;
    font-family: "Inter", sans-serif; 
    word-spacing: 2px;
    margin-left: 380px;
    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;
}


#linking{
  margin-top: 70px;
  margin-bottom: 70px;
  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;
  font-family: sans-serif;
  font-size: 20px;
}

.container-components {
  display: flex;
  flex-direction: column; 
  align-items: center; 
}

.compo {
  display: flex;
  flex-direction: row; 
  align-items: center; 
  margin-bottom: 20px; 
}



.title{
  text-decoration: underline rgb(196, 147, 231);
    font-size: 40px;
    margin-left:50px;
    margin-top:50px;
}

.image-container{
  margin-left:30px;
  margin-top:35px;
 float:left;
 width:30%;
 height: 300px;
 background-color: rgb(196, 147, 231);
 border-radius: 20px;
 font-family: serif;
}

.image-container2{
  margin-left:30px;
  margin-top:35px;
 float:left;
 width:40%;
 height: 300px;
 background-color: rgb(196, 147, 231);
 border-radius: 20px;
 font-family: serif;
}
.image-container3{
  margin-left:30px;
  margin-top:35px;
 float:left;
 width:27%;
 height: 300px;
 background-color: rgb(196, 147, 231);
 border-radius: 20px;
 font-family: serif;
}

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

.expln{
  padding: 20px;
    float:left;
    width:40%;
    font-size: 25px;
    font-family: serif;
    margin-top: 55px;
    margin-left:30px;
    color: black;
}

/* drag and drop */

.game-text{
  margin-top: 100px;
  margin-bottom: 50px;
  font-family: "Inter", sans-serif;
  color: var(--secondary-color);
  font-size:xx-large;
  text-align: center;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.draggable-elements {
  margin-top: 100px;
   display: flex; 
  justify-content: center;
  margin: 2rem;
}
.draggable {
  height: 9rem;
  width: 8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  margin: 0rem 0.5rem;
  cursor: move;
  transition: opacity 0.2s;
}
.draggable:hover {
  opacity: 0.5;
}
.droppable {
  height: 9.5rem;
  width: 8.5rem;
  margin: 1rem auto;
  display: flex;
  justify-content: center;
  align-items: center;
  /* flex-direction: column; */
  text-align: center;
  font-size: 4rem;
  font-weight: bold;
  background-color: #fff;
  border: 3px dashed #111;
  transition: border-width 0.2s, transform 0.2s, background-color 0.4s;
}
.droppable-elements {
  margin-top: 100px;
   display: flex; 
  justify-content: center;
  margin: 2rem;
}
.droppable span {
  font-size: 1.25rem;
  pointer-events: none; /* The element is never the target of pointer events */
}

/* Drag and Drop Related Styling */

.droppable.droppable-hover {
  /* background-color: #bee3f0; */
  border-width: 5px;
  transform: scale(1.1);
}
.droppable.dropped {
  border-style: solid;
  color: #fff;
}
.droppable.dropped span {
  font-size: 0.75rem;
  margin-top: 0.5rem;
}
.droppable.dropped i {
  pointer-events: none;
}
.draggable.dragged {
  user-select: none;
  opacity: 0.1;
  cursor: default;
}
.draggable.dragged:hover {
  opacity: 0.1;
}

@media (max-width: 600px) {
  html { font-size: 14px; }
  .draggable-elements { margin: 1.5rem; }
}

#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: 550px;
  font-size: x-large;
  margin-top: 50px;
  }
  #nxt-btn:hover{
    transform: scale(1.025);
  }

  .gif{
    height: 130px;
    width:180px;
    margin-left: 300px;
  }
 
.quiz-btn{
  position: absolute;
    top:1750px;
    margin-top: 100px;
    left:550px;
    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);
}

.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);
}

#section1{
  margin-left: 70px;
}