:root{
  --white: #ffffff;
  --black:#000000;
  --lightO:#f4d19b;
  --darkO:#ffbf5b;
  --gray:#565252;
  --aboutG:#fffaf4cc;
}
*{
  margin: 0px;
  padding: 0px;
  box-sizing: border-box;
}
body {
  font-family: 'Segoe UI', sans-serif;
  color: #333;
  line-height: 1.6;
  background-color: var(--darkO);
}
body.dark-mode {
 --white: #1e1e1e;
 --black: #ffffff;
 --lightO: #ffbf5b;
 --darkO: #333333;
 --gray: white;
 --aboutG: #2a2a2acc;
 background: black;
 color: white;
}
/* Header */
header{
  padding: 10px;
  background: var(--darkO);
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav div.leftHeader {
  padding: 10px 0px 10px 30px;
}
.menu-toggle {
  display: none;
  font-size: 25px;
  cursor: pointer;
  user-select: none;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 10px;
}
nav div.rightHeader{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 100px 10px 0px;
}
nav ul li a  {
  text-decoration: none;
  color: var(--black);
  padding: 5px 6px;
}
nav ul li a:hover {
  text-decoration: underline;
  border-radius: 15px;
}
body.dark-mode {
  background: #121212;
  color: #ffffff;
}
nav div.rightHeader button.toggle-btn {
  padding: 10px 20px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-size: 16px;
  background: #000;
  color: #fff;
  transition: background 0.3s, color 0.3s;
}
body.dark-mode .toggle-btn {
  background: #fff;
  color: #000;
}
header section.hero {
  display: flex;
  padding: 30px;
  justify-content: space-around;
}
header section.hero .hero-left{
  padding: 30px;
  font-size: 20px;
  max-width: 300px;
}
header section.hero .hero-left span{
  background-color: var(--black);
  border-radius: 50px;
  color: var(--lightO);
  padding: 10px;
}
header section.hero .hero-right {
  padding: 30px;
  max-width: 380px;
}
header section.hero .hero-right button{
  border: 1px var(--black) solid;
  background-color: transparent;
  padding: 10px;
  border-radius: 25px;
  margin-top: 10px;
  cursor: pointer;
}
header nav div.links {
  position: relative;
}
header header nav div.links:hover span.icon span:nth-child(2) {
  width: 100%;
}
header nav div.links span.icon {
  width: 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
}
header nav div.links span.icon span {
  background-color: #333;
  margin-bottom: 5px;
  height: 2px;
}
header nav div.links span.icon span:first-child {
  width: 100%;
}
header nav div.links span.icon span:nth-child(2) {
  width: 60%;
  transition: 0.3s;
}
header nav div.links span.icon span:last-child {
  width: 100%;
}
header nav div.links ul{
  list-style: none;
  padding: 0%;
  margin: 0%;
  background-color: #f6f6f6;
  position: absolute;
  right: 0;
  min-width: 200px;
  top: calc(100% + 15px);
  display:none;
  z-index: 1;
}
header nav div.links:hover ul {
  display: block;
}
header nav div.links ul::before{
  content: "";
  border-width: 10px;
  border-style:solid ; 
  border-color:transparent transparent #f6f6f6 transparent ;
  position: absolute;
  top: -20px;
  right: 0px;
}
header nav div.links ul li a {
  display: block;
  padding: 15px;
  text-decoration: none;
  color: #333;
  transition: 0.3s;
}
header nav div.linkss ul li a:hover{
  padding-left: 25px;
}
header nav div.links ul li:not(:last-child) a {
  border-bottom: 1px solid #ddd;
}
@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    position: absolute;
    top: 60px;
    right: 10px;
    background: var(--white);
    width: 200px;
    display: none;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
    z-index: 1000;
  }
  nav ul.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
}
/* Section stats */
section.stats{
  display: flex;
  justify-content: space-around;
  padding: 50px;
  background-color: var(--white);
}
section.stats div.stat{
  text-align: center;
  font-size: 30px;
  font-weight: bold;    
}
section.stats div.stat span{
    display: block;
    font-size: 12px;
    color: #545151;
    font-weight: 100;
}
/* About Section  */
section.about{
    display: flex;
    padding: 30px;
    background-color: var(--aboutG);
    gap: 50px;
}
section.about div.aboutReight{
    padding: 50px 20px 0px 50px;
    max-width: 400px;
}
section.about div.aboutReight h2{
    font-size: 30px;
    padding: 5px;
}
section.about div.aboutReight span{
    border: 1px var(--black) solid;
    border-radius: 50px;
    padding: 4px 10px;
    background-color: var(--lightO);
}
/* Features Section */
section.features{
    padding: 50px ;
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 50px;    
}
section.features div img{
    width: 50px;
}
section.features div.cardOne{
    grid-column: 1/3;
    background-color: var(--black);
    border-radius: 35px;
    padding: 50px;
    color: var(--white);
}
section.features div.cardOne span{
    color: var(--lightO);
}
section.features div.cardOne button{
    margin-top: 20px;
    color: var(--black);
    background-color: var(--lightO);
    padding: 10px 20px;
    border-radius: 30px;
    cursor: pointer;
    border: none;
}
section.features div.cardTwo{
    grid-column: 3/4;
    background-color: var(--white);
    padding: 30px;
    border-radius: 25px;
}
section.features div.cardThree{
    grid-column: 1/2;
    background-color: var(--white);
    padding: 30px;
    border-radius: 25px;
}
section.features div.cardFour{
    grid-column: 2/3;
    background-color: var(--white);
    padding: 30px;
    border-radius: 25px;
}
section.features div.cardFive{
    grid-column: 3/4;
    background-color:var(--white);
    padding: 30px;
    border-radius: 25px;
}
/* Portfolio / Courses Section */
section.popular-courses{
    color: var(--white);
    background-color: var(--gray);
    padding: 50px;
}
section.popular-courses h2{
    font-size: 25px;
    text-align: center;
}
section.popular-courses img{
    width: 300px;
    border-radius: 12px;
    margin-top: 8px;
}
section.popular-courses span{
    color: var(--lightO);;
    border: 1px var(--lightO) solid;
    padding: 2px 5px;
    border-radius: 20px;
}
section.popular-courses div.course-cards{
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
    gap: 30px;
}
section.popular-courses div.course-cards div.card{
    background-color: var(--white);
    border-radius: 16px;
    color: var(--black);
    text-align: center;
}
section.popular-courses div.card div.course-details{
    display: flex;
    justify-content: space-around;
}
section.popular-courses div.course-cards div.card h2{
    padding: 20px ;
}
section.popular-courses div.course-cards div.card button{
    padding: 10px 15px;
    border-radius: 35px;
    background-color: transparent;
    margin-left: 20px;
    margin-bottom: 10px;
    cursor: pointer;
    border: 1px solid var(--gray);
}
section.popular-courses div.course-cards div.card button:hover{
    color: var(--gray);
    background-color: transparent;
    border: 1px solid var(--lightO);
}
/* Start-learning Section */
section.start-learning{
    display: flex;
    padding: 50px;
    gap: 70px;
    justify-content: space-evenly;
}
section.start-learning div.learning-left{
    padding-right: 50px;
}
section.start-learning div.learning-left h2{
    font-size: 25px;
    font-weight: bold;
}
section.start-learning div.learning-left span{
    border: 1px var(--black) solid;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 25px;
    font-weight: 200;
}
section.start-learning div.learning-left p{
    color: var(--gray);
    margin-top: 20px;
    max-width: 350px;
}
section.start-learning div.learning-left ul{
    list-style: none;
}
section.start-learning div.learning-left ul li{
    font-weight: bold;
}
section.start-learning div.learning-left ul li i{
    background-color: var(--darkO);
    border-radius: 50%;
    padding: 4px;
    margin: 20px 10px 0px 0px;
}
section.start-learning div.learning-right img{
    width: 400px;
    border-radius: 50%;
}
/* Get-started Section */
section.get-started{
    display: flex;
    justify-content: space-around;
    background-color: #fabd5f;
    border-radius: 12px;
    padding: 50px;
    width: 60%;
    margin: auto;
    border-radius: 20px;
}
section.get-started div.get-left img{
    width: 300px;
    border-radius: 12px;
}
section.get-started div.get-right{
    padding: 50px;
    margin-left: 70px;
    font-weight: bold;
}
section.get-started div.get-right p{
    padding:20px 0px;
}
section.get-started div.get-right button{
    padding: 20px 30px;
    background-color: #333;
    color: #fabd5f;
    border: none;
    border-radius: 35px;
    cursor: pointer;
}
section.get-started div.get-right button:hover{
    background-color: transparent;
    color: var(--black);
    border: 1px solid var(--black);
}
/* Mobile-app Section */
section.mobile-app{
    padding: 50px;
    text-align: center;
}
section.mobile-app h1{
    font-weight: bold;
    font-size: 30px;
}
section.mobile-app span{
    background-color: #fabd5f;
    border: 1px solid var(--black);
    padding: 4px 13px;
    border-radius: 35px;
    font-style: italic;
}
section.mobile-app div.app-a{
    padding: 30px;
}
section.mobile-app div.app-a a{
    background-color: var(--black);
    color: var(--white);
    padding: 20px;
    border-radius: 8px;
    text-decoration: none;
    margin: 0px 10px;
}
section.mobile-app div.app-a a img{
    width: 17px;
    margin-right: 5px;
}
/* Footer */
footer{
    width: 80%;
    margin: auto;
    padding: 50px;
    background-color: var(--black);
    border-radius: 20px;
    display: grid;
    grid-template-columns: repeat(5,1fr);
    justify-content: space-evenly;
}
footer div#footerco{
    grid-column: 1/3;
}
footer div.footer-column{
    color: var(--white);
    padding: 20px;
}
footer div.footer-column p.copyright{
    margin-top: 50px;
}
footer div.footer-column ul{
    padding: 5px;
    list-style: none;
}
footer div.footer-column ul li{
    padding: 20px 0px;
}
footer div.footer-column ul li a{
    color: var(--white);
    text-decoration: none;    
}

/* media */
@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
  }
  nav ul.nav-links {
    display: none;
    flex-direction: column;
    width: 30%;
    background: var(--white);
    position: absolute;
    top: 60px;
    left: 10px;
    padding: 20px;
  }
  nav ul.nav-links.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
  header section.hero {
    flex-direction: column;
    padding: 20px;
  }
  section.stats ,section.about {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  section.features {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  section.popular-courses div.course-cards {
    flex-direction: column;
    align-items: center;
  }
  section.start-learning {
    flex-direction: column;
  }
  section.get-started {
    width: 100%;
    padding: 30px;
  }
  section.mobile-app div.app-a a {
    display: block;
    margin: 10px auto;
    width: 80%;
  }
  footer {
    grid-template-columns: 1fr;
    text-align: center;
  }
}
@media (max-width: 1024px) {
  header section.hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  section.stats {
    flex-wrap: wrap;
    gap: 30px;
  }
  section.features {
    grid-template-columns: 1fr 1fr; 
  }
  section.start-learning {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  section.get-started {
    flex-direction: column;
    text-align: center;
    width: 90%;
  }
  footer {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 480px) {
  body {
    font-size: 14px;
  }
  header nav div.links {
    overflow: hidden;
  }
  header nav div.links span.icon{
    visibility: hidden;
  }
  nav {
    flex-wrap: wrap;
  }
  nav ul.nav-links {
    display: none;
    flex-direction: column;
    width: 30%;
    background: var(--white);
    position: absolute;
    top: 60px;
    right: 10px;
    padding: 20px;
  }
  nav ul.nav-links.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
  header section.hero {
    flex-direction: column;
    padding: 20px;
  }
  section.stats ,section.about{
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  section.features {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  section.popular-courses div.course-cards {
    flex-direction: column;
    align-items: center;
  }
  section.start-learning {
    flex-direction: column;
  }
  section.get-started {
    width: 100%;
    padding: 30px;
  }
  section.mobile-app div.app-a a {
    display: block;
    margin: 10px auto;
    width: 80%;
  }
  footer {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  nav .toggle-btn {
    font-size: 14px;
    padding: 8px 15px;
  }
  header section.hero .hero-left {
    font-size: 16px;
    padding: 15px;
  }
  section.start-learning div.learning-right img {
    width: 250px;
  }
  section.get-started div.get-left img {
    width: 200px;
  }
  section.mobile-app h1 {
    font-size: 22px;
  }
}


/* Floating Button */
#theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #333;
  color: #fff;
  border: none;
  border-radius: 50%;
  padding: 15px;
  cursor: pointer;
  font-size: 20px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  z-index: 1000;
}
.customizer {
  position: fixed;
  top: 0;
  right: -320px; /* hidden by default */
  width: 320px;
  height: 100%;
  background: #ffffff;
  box-shadow: -4px 0 15px rgba(0, 0, 0, 0.15);
  transition: right 0.3s ease-in-out;
  padding: 25px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
}
.customizer.active {
  right: 0; /* slide in */
}
.customizer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #ddd;
  padding-bottom: 10px;
}
.customizer-header h3 {
  font-size: 18px;
  color: #333;
  margin: 0;
}
.customizer-header .close-btn {
  font-size: 18px;
  cursor: pointer;
  background: #f1f1f1;
  border-radius: 50%;
  padding: 5px 10px;
  transition: background 0.2s;
}
.customizer-header .close-btn:hover {
  background: #ddd;
}
.custom-section {
  margin-top: 20px;
}
.custom-section h4 {
  font-size: 14px;
  margin-bottom: 8px;
  color: #555;
}
.custom-section input[type="color"] {
  width: 100%;
  height: 45px;
  border: 2px solid #ccc;
  border-radius: 8px;
  cursor: pointer;
  padding: 2px;
  transition: border 0.2s;
}
.custom-section input[type="color"]:hover {
  border-color: #333;
}
#applyTheme {
  margin-top: auto;
  width: 100%;
  padding: 14px;
  border: none;
  background: #333;
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  transition: background 0.3s, transform 0.2s;
}
#applyTheme:hover {
  background: #555;
  transform: translateY(-2px);
}
/* 🌙 DARK MODE STYLES */
body.dark-mode .customizer {
  background: #1e1e1e;
  color: #eee;
  box-shadow: -4px 0 15px rgba(0, 0, 0, 0.6);
}
body.dark-mode .customizer-header {
  border-bottom: 1px solid #444;
}
body.dark-mode .customizer-header h3 {
  color: #fff;
}
body.dark-mode .customizer-header .close-btn {
  background: #333;
  color: #fff;
}
body.dark-mode .customizer-header .close-btn:hover {
  background: #555;
}
body.dark-mode .custom-section h4 {
  color: #bbb;
}
body.dark-mode .custom-section input[type="color"] {
  border: 2px solid #555;
  background: #2a2a2a;
}
body.dark-mode #applyTheme {
  background: #f4d19b; 
  color: #000;
}
body.dark-mode #applyTheme:hover {
  background: #ffbf5b; 
}