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

  body {
    background: linear-gradient(to bottom, #a5d6a7, #f0f4f0);
    color: #333;
  }

  nav {
    background-color: #2e7d32;
    padding: 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav-logo {
    display: flex;
    align-items: center;
  }

  .nav-logo img {
    width: 40px;
    margin-right: 0.5rem;
    transition: transform 0.3s ease-in-out;
  }

  .nav-logo img:hover {
    transform: rotate(360deg);
  }

  .nav-logo span {
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
  }

  nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
  }

  nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease-in-out;
  }

  nav a:hover {
    color: #a5d6a7;
  }

  .container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
  }

  h1, h2 {
    color: #1b5e20;
    text-align: center;
    margin-bottom: 1rem;
  }

  p {
    line-height: 1.6;
    margin-bottom: 1rem;
  }

  button {
    background-color: #4caf50;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease-in-out, transform 0.2s ease-in-out;
  }

  button:hover {
    background-color: #388e3c;
    transform: scale(1.05);
  }

  /* Home Page Main Box */
  .main-box {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .main-box h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
  }

  .main-box p {
    font-size: 1.2rem;
    color: #555;
  }

  .main-box button {
    margin-top: 1rem;
    padding: 1rem 2rem;
    font-size: 1.2rem;
  }

  /* Home Page Info Boxes */
  .info-boxes {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .info-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    width: 30%;
    text-align: center;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .info-box:nth-child(2) {
    animation-delay: 0.2s;
  }

  .info-box:nth-child(3) {
    animation-delay: 0.4s;
  }

  .info-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  }

  .info-box h3 {
    color: #2e7d32;
    margin-bottom: 0.5rem;
  }

  @keyframes slideIn {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* Recycle Page */
  .recycle-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 2rem auto;
  }

  .recycle-btn {
    background-color: #66bb6a;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 220px;
    justify-content: center;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
  }

  .recycle-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  }

  .recycle-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
  }

  .recycle-btn img {
    width: 30px;
    height: 30px;
  }

  .name-input {
    margin: 1rem auto;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .name-input input {
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 200px;
  }

  .name-input button {
    margin-left: 0.5rem;
  }

  /* Waste Calculator */
  .waste-calculator {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem auto;
    max-width: 600px;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
    animation-delay: 0.2s;
  }

  .waste-calculator h3 {
    color: #2e7d32;
    margin-bottom: 1rem;
  }

  .waste-inputs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
  }

  .waste-input {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .waste-input label {
    color: #1b5e20;
    font-weight: bold;
    margin-bottom: 0.5rem;
  }

  .waste-input input {
    width: 100px;
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    text-align: center;
  }

  .waste-calculator button {
    margin-top: 1rem;
  }

  .waste-result {
    margin-top: 1rem;
    font-size: 1.1rem;
    color: #1b5e20;
  }

  .health-feedback {
    margin-top: 1rem;
    font-size: 1.1rem;
    color: #d81b60;
    font-weight: bold;
  }

  /* Dashboard Page */
  .points-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .points-box h2 {
    font-size: 2rem;
    color: #1b5e20;
  }

  .badges-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
    animation-delay: 0.2s;
  }

  .badges-box img {
    width: 80px;
    margin: 0.5rem;
  }

  .progress-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
    animation-delay: 0.4s;
  }

  .progress-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  }

  .progress-bar {
    width: 100%;
    background-color: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
    margin: 1rem 0;
  }

  .progress-fill {
    height: 20px;
    background-color: #4caf50;
    transition: width 0.5s ease-in-out;
  }

  .badge {
    font-weight: bold;
    color: #d81b60;
    margin-top: 0.5rem;
  }

  /* Leaderboard Page */
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background-color: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
  }

  th {
    background-color: #2e7d32;
    color: white;
  }

  .stars img {
    width: 20px;
    vertical-align: middle;
  }

  .badge-img {
    width: 30px;
    vertical-align: middle;
  }

  /* Stats Page */
  .chart-container {
    max-width: 600px;
    margin: 1rem auto;
    background-color: white;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .chart-container:nth-child(2) {
    animation-delay: 0.2s;
  }

  .chart-container:nth-child(3) {
    animation-delay: 0.4s;
  }

  .chart-container:nth-child(4) {
    animation-delay: 0.6s;
  }

  .chart-container canvas {
    width: 100% !important;
    height: 300px !important;
  }

  .impact-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    margin-top: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
    animation-delay: 0.8s;
  }

  .impact-box h3 {
    color: #2e7d32;
    margin-bottom: 1rem;
  }

  .impact-stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
  }

  .impact-stat {
    margin: 0.5rem;
  }

  .impact-stat p:first-child {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1b5e20;
  }

  /* AI Chat Page */
  .chat-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem auto;
    max-width: 600px;
  }

  .chat-input-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
  }

  .chat-input-box textarea {
    width: 100%;
    padding: 0.5rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 1rem;
    resize: vertical;
  }

  .chat-response-box {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateY(20px);
    animation: slideIn 0.5s ease-in-out forwards;
    animation-delay: 0.2s;
  }

  /* Celebration Animation */
  .celebration {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: #d81b60;
    animation: fade 2s ease-in-out;
  }

  @keyframes fade {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
  }

  /* Footer */
  footer {
    background-color: #2e7d32;
    color: white;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
  }

  footer p {
    margin: 0.5rem 0;
  }

  footer a {
    color: #a5d6a7;
    text-decoration: none;
  }

  footer a:hover {
    color: white;
  }

  @media (max-width: 600px) {
    nav {
      flex-direction: column;
      gap: 1rem;
    }

    nav ul {
      flex-direction: column;
      align-items: center;
    }

    button {
      width: 100%;
    }

    .container {
      margin: 1rem;
    }

    .name-input input {
      width: 100%;
    }

    .recycle-options {
      flex-direction: column;
      align-items: center;
    }

    .info-box {
      width: 100%;
    }

    .impact-stats {
      flex-direction: column;
    }

    .chart-container {
      max-width: 100%;
    }

    .waste-inputs {
      flex-direction: column;
      align-items: center;
    }

    .waste-input input {
      width: 150px;
    }
  }