*
 {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: Arial, sans-serif;
            scroll-behavior: smooth;
        }
        
        .ai-box {
            border: 2px solid currentColor;
            padding: 2px 6px;
            display: inline-block;
            border-radius: 3px;
            font-weight: bold;
        }
        
        header {
            position: fixed;
            top: 0;
            width: 100%;
            background-color: #ffffff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            padding: 15px 50px;
            display: flex;
            justify-content: flex-end;
            align-items: center;
            z-index: 1000;
        }
        
        .navbar {
            display: flex;
            gap: 30px;
            margin-right: 30px;
        }
        
        .dropdown {
            position: relative;
            display: inline-block;
        }
        
        .dropbtn {
            background-color: transparent;
            color: #333;
            padding: 16px;
            font-size: 16px;
            border: none;
            cursor: pointer;
            font-weight: 500;
        }
        
        .dropdown-content {
            display: none;
            position: absolute;
            background-color: #f9f9f9;
            min-width: 160px;
            box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
            z-index: 1;
            right: 0;
        }
        
        .dropdown-content a {
            color: black;
            padding: 12px 16px;
            text-decoration: none;
            display: block;
        }
        
        .dropdown-content a:hover {
            background-color: #f1f1f1;
        }
        
        .dropdown:hover .dropdown-content {
            display: block;
        }
        
        .dropdown:hover .dropbtn {
            background-color: #f1f1f1;
        }
        
        .login-btn {
            padding: 10px 25px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 16px;
        }
        
        .login-btn:hover {
            background-color: #0056b3;
        }
        
        .hero-section {
            margin-top: 70px;
            height: 60vh;
            background-image: url('https://images.unsplash.com/photo-1449824913935-59a10b8d2000?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            position: relative;
            display: flex;
            align-items: flex-start;
            justify-content: flex-start;
            padding: 40px 50px;
        }
        
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.4);
            z-index: 1;
        }
        
        .hero-section h1 {
            position: relative;
            z-index: 2;
            color: white;
            font-size: 48px;
        }
        
        .spatial-section {
            background-color: #007bff;
            padding: 40px 50px;
            min-height: 40vh;
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .spatial-section .content-wrapper {
            flex: 1;
        }
        
        .spatial-section h2 {
            color: #ffffff;
            margin-bottom: 15px;
            font-size: 32px;
        }
        
        .spatial-section p {
            color: #ffffff;
            line-height: 1.8;
            font-size: 18px;
            max-width: 900px;
            margin-bottom: 20px;
        }
        
        .datasets-header {
            color: #000000;
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        
        .dataset-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
        
        .dataset-btn {
            padding: 15px 30px;
            background-color: #ffffff;
            color: #007bff;
            border: 2px solid #ffffff;
            border-radius: 8px;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .dataset-btn:hover {
            background-color: #007bff;
            color: #ffffff;
            border-color: #ffffff;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        }
        
        .stamp {
            border: 5px solid #ffffff;
            border-radius: 15px;
            padding: 30px 40px;
            background-color: rgba(255, 255, 255, 0.1);
            transform: rotate(-5deg);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            max-width: 400px;
        }
        
        .stamp h3 {
            color: #ffffff;
            font-size: 28px;
            text-align: center;
            line-height: 1.3;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .ai-section {
            background-color: #f8f9fa;
            padding: 60px 50px;
            min-height: 40vh;
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .ai-section .content-wrapper {
            flex: 1;
        }
        
        .ai-section h2 {
            color: #333;
            margin-bottom: 20px;
            font-size: 32px;
        }
        
        .ai-section p {
            color: #666;
            line-height: 1.8;
            font-size: 18px;
            max-width: 900px;
        }
        
        .ai-section .stamp {
            border-color: #007bff;
            background-color: rgba(0, 123, 255, 0.1);
        }
        
        .ai-section .stamp h3 {
            color: #007bff;
        }