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

body {
  font-family: "Arial", sans-serif;
  line-height: 1.6;
  color: #333;
  overflow-x: hidden;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  backdrop-filter: blur(10px);
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  transition: all 0.3s ease;
}

.logo {
  font-size: 2rem;
  font-weight: bold;
  color: #2d5016;
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  padding: 10px;
}

.nav-links a {
  text-decoration: none;
  color: #ffffff;
  font-weight: 600;
  transition: color 0.3s ease;
  position: relative;
  padding: 10px 20px;
  border: 2px solid white;
  border-radius: 30px;
}

.home-b a{
    background-color: #ffffff;
    color: black;
    border: 2px solid rgb(0, 0, 0);
    border-radius: 30px;
}

.login-b a{
    background-color: #348236;
}

.register-b a{
    background-color: #5085ff;
}

.nav-links a:hover {
  transform: scale(1.15);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: #ffffff;
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: #333;
  margin: 3px 0;
  transition: 0.3s;
}

/* Section Base Styles */
.section {
  min-height: 85vh;
  padding: 2rem 5%;
  opacity: 0;
  transform: translateY(50px);
  transition: all 1s ease;
}

.section1 {
  transform: translateY(50px);
  transition: all 1s ease;
}

.section.visible {
  opacity: 1;
  transform: translateY(0);
}

.section1.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Introduction Section */
.intro-section {
  /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
  min-height: 100vh;
  background: 
    radial-gradient(
      circle at top right,
      rgba(0, 255, 0, 0.3) 0%,   /* start of gradient color */
      rgba(0, 0, 0, 0) 60%      /* fade to transparent */
    ),
    white;
  position: relative;
  display: flex;
  align-items: center;
  color: black;
  padding-top: 5rem;
}

.intro-content {
  flex: 1;
  max-width: 600px;
}

.intro-content h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.intro-content p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.button-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
  text-align: center;
}

.btn-primary {
  background: #4caf50;
  color: white;
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.intro-image {
  flex: 1;
  background: url('https://i.pinimg.com/1200x/94/03/b4/9403b4a2c71563b18983187ad8c64d3e.jpg') no-repeat center;
  background-size: cover;
  min-height: 400px;
  opacity: 0.7;
  border-radius: 30px;
}

/* Need Intro Section */
.need-intro {
  background: #ffffff;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.need-image {
  flex: 1;
  height: 300px;
  overflow: hidden;
}

.ocean-image {
  /* background: linear-gradient(45deg, #1e3c72 0%, #2a5298 100%); */
  background: url(https://i.pinimg.com/736x/4d/6b/ca/4d6bca545e5612a04c51cf16271fddfb.jpg) no-repeat center;
  position: relative;
  border-radius: 120px 10px;
  align-items: center;
}

.ocean-image::after {
  /* content: "🌊"; */
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
}

.tree-image {
  /* background: linear-gradient(45deg, #4caf50 0%, #81c784 100%); */
  background: url(https://i.pinimg.com/736x/d4/7e/a9/d47ea9e653645f892702feebd99032d8.jpg) no-repeat center;
  position: relative;
  border-radius: 10px 120px;
}

.tree-image::after {
  /* content: "🌳"; */
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
}

.need-content {
  flex: 1;
  text-align: center;
}

.need-content h2 {
  font-size: 2.5rem;
  color: #2d5016;
  margin-bottom: 1.5rem;
}

.need-content p {
  font-size: 1.2rem;
  line-height: 1.8;
  color: #555;
}

/* Field Diverse Section */
.field-diverse {
  background: white;
}

.field-header {
  text-align: center;
  margin-bottom: 4rem;
}

.field-header h2 {
  font-size: 2.5rem;
  color: #2d5016;
  margin-bottom: 1rem;
}

.field-header p {
  font-size: 1.3rem;
  color: #666;
  max-width: 800px;
  margin: 0 auto;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.field-item {
  /* background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); */
  padding: 2rem;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  color: rgb(0, 0, 0);
}

.field-item:hover {
  transform: translateY(-10px);
  /* box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1); */
}

.field-item .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.field-item h3 {
  font-size: 1.5rem;
  /* color: #000000; */
  margin-bottom: 0.5rem;
}

.field-item p {
  /* color: #ffffff; */
  font-size: 0.9rem;
  font-style: bold;
  font-weight: 600;
}

.climateimg {
  background: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/1200x/e0/ec/d4/e0ecd4cf25fe10ae8213fcade691bf22.jpg) no-repeat center;
  background-size: cover;
}

.oceanimg {
  background: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/736x/cd/0e/45/cd0e4585175f1d00f84b16b0ce88c3b8.jpg) no-repeat center;
  background-size: cover;
}

.wildlifeimg {
  background: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/1200x/72/16/99/72169955d6c44ad504d7cfb3e28ade33.jpg) no-repeat center;
  background-size: cover;
}

.forestimg {
  background: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/736x/6d/a8/c6/6da8c68051d114fa5e51a5f60c37328a.jpg) no-repeat center;
  background-size: cover;
}

.energyimg {
  background: linear-gradient(rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/736x/c8/18/a5/c818a5a546c3eb0ff60f2e1a1bc30c31.jpg) no-repeat center;
  background-size: cover;
}

.wasteimg {
  background: linear-gradient(rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.6)), url(https://i.pinimg.com/1200x/03/14/39/0314395201f3c3bbb395320049b73eb6.jpg) no-repeat center;
  background-size: cover;
}



/* Goal Section */
.goal-section {
  /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
  background-color: #ffffff;
  color: rgb(0, 0, 0);
  display: flex;
  align-items: center;
  gap: 4rem;
}

.goal-content {
  flex: 1;
}

.goal-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.goal-content p {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.goal-visual {
  flex: 1;
  position: relative;
}

.plant-image {
  width: 80%;
  height: 350px;
  /* background: linear-gradient(45deg, #4caf50 0%, #81c784 100%); */
  background: url(https://i.pinimg.com/1200x/eb/84/56/eb84561132985271c501be1c68696238.jpg) no-repeat center;
  border-radius: 20px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.overlay-tab {
  position: absolute;
  top: 150px;
  right: 30px;
  background: rgba(255, 255, 255, 0.95);
  color: #333;
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  max-width: 300px;
  text-align: right;
}

.overlay-tab h3 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: #2d5016;
}

.overlay-tab p {
  font-size: 0.7rem;
  margin-bottom: 1rem;
  color: #373737;
}

.overlay-tab .btn {
  font-size: 0.9rem;
  padding: 0.8rem 1.5rem;
}

/* Footer */
.footer {
  background: #2d5016;
  color: white;
  padding: 2rem 5%;
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.5s ease;
  /* padding: 3rem 1% 1rem; */
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  /* margin-bottom: 2rem; */
}

.footer-links h3 {
  margin-bottom: 1rem;
  color: #81c784;
}

.footer-links p {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #ccc;
  text-decoration: none;
  margin-right: 1rem;
}

.footer-links a:hover {
  color: #81c784;
}

.footer-contact h3 {
  margin-bottom: 1rem;
  color: #81c784;
}

.footer-contact p {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid #4caf50;
  padding-top: 1rem;
  text-align: center;
  color: #ccc;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: white;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 2rem;
    transition: left 0.3s ease;
  }

  .nav-links.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .intro-section {
    flex-direction: column;
    text-align: center;
    padding: 6rem 5% 2rem;
  }

  .intro-content h1 {
    font-size: 2.5rem;
  }

  .intro-content p {
    font-size: 1.1rem;
  }

  .intro-image {
    min-height: 250px;
    margin-top: 2rem;
  }

  .need-intro {
    flex-direction: column;
    gap: 2rem;
  }

  .need-image {
    height: 200px;
  }

  .need-content h2 {
    font-size: 2rem;
  }

  .field-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .field-item {
    padding: 1.5rem;
  }

  .goal-section {
    flex-direction: column;
    gap: 2rem;
  }

  .overlay-tab {
    position: static;
    margin-top: 1rem;
    max-width: none;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .section {
    padding: 2rem;
  }
}

@media (max-width: 480px) {
  .field-grid {
    grid-template-columns: 1fr;
  }

  .intro-content h1 {
    font-size: 2rem;
  }

  .need-content h2,
  .field-header h2,
  .goal-content h2 {
    font-size: 1.8rem;
  }
}