/* General Reset */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
/* Make the viewport truly edge-to-edge */
html, body {
  margin: 0;          /* remove browser default margin */
  height: 100%;       /* let each element fill the viewport vertically */
  width: 100%;        /* …and horizontally */

  /* OPTIONAL — keep your font choice */
  font-family: Georgia, "Times New Roman", Times, serif;

  /* Full-page background */
  background: url("../Image/footprintimage/Copy of Act for Our Planet.png")
              center / cover no-repeat;
  /* shorthand above equals:
     background-image: url(...);
     background-position: center;
     background-size: cover;
     background-repeat: no-repeat;
  */
}

  
  /* Header */
  .main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 30px;
    background-color:#9ba09b49;
    color: white;
    width: 100%;
    z-index: 10;
  }
  
  .logo {
    height: 80px;
  }
  
  .nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
  }
  
  .nav-links li a {
    text-decoration: none;
    color: rgb(0, 0, 0);
    font-weight: bold;
    padding-bottom: 5px;
    transition: 0.3s ease;
  }
  
  .nav-links li a:hover,
  .nav-links li.active a {
    color: #376847;
    border-bottom: 2px solid #376847;
  }
  
  .user-icon {
    height: 50px;
    cursor: pointer;
  }

.container { max-width: 600px; 
    margin: 50px auto; 
    background-color: #fff; 
    padding: 30px; 
    border-radius: 10px; 
    box-shadow: 0 0 15px rgba(0,0,0,0.1); }
    h2 { text-align: center; color: #3e7a3e; }
label { display: block;
     margin-top: 20px;
      color: #555; }
        input[type="range"] { width: 100%; margin-top: 10px; }

        .value-label { text-align: right; 
            font-size: 14px;
            color: #666; }
        button { padding: 12px 20px;
            margin-top: 25px; 
            cursor: pointer;
            width: 100%; background-color: #3e7a3e;
            color: white;
            border: none; 
            border-radius: 5px;
            font-size: 16px; }
        button:hover { background-color: #336633; }
        .result { margin-top: 20px;
            padding: 15px;
            background-color: #e8f5e9; 
            border-radius: 5px;
            color: #2e7d32;
            font-weight: bold; 
            text-align: center; }