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

        body {
            font-family: 'Courier New', monospace;
            background: linear-gradient(45deg, #001122, #1a2744);
            color: #ffffff;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Matrix Rain Animation */
        .matrix-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
        }

        .matrix-text {
            position: absolute;
            font-size: 20px;
            color: #4488ff;
            opacity: 0.3;
            animation: matrix-fall linear infinite;
        }

        @keyframes matrix-fall {
            to {
                transform: translateY(100vh);
            }
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            position: relative;
            z-index: 1;
        }

        .page {
            display: none;
            background: rgba(255, 255, 255, 0.95);
            border: 2px solid #4488ff;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 0 30px rgba(68, 136, 255, 0.3);
            backdrop-filter: blur(10px);
            color: #333333;
        }

        .page.active {
            display: block;
        }

        h1, h2 {
            text-align: center;
            margin-bottom: 20px;
            text-shadow: 0 0 10px #4488ff;
            color: #2266dd;
        }

        .intro {
            text-align: center;
            margin-bottom: 30px;
            font-size: 18px;
            line-height: 1.6;
            color: black;
        }

        .btn-container {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 30px 0;
            flex-wrap: wrap;
        }

        .btn {
            background: linear-gradient(45deg, #2266dd, #4488ff);
            color: #ffffff;
            border: none;
            padding: 12px 25px;
            border-radius: 25px;
            cursor: pointer;
            font-family: 'Courier New', monospace;
            font-weight: bold;
            font-size: 16px;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn:hover {
            background: linear-gradient(45deg, #4488ff, #66aaff);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(68, 136, 255, 0.4);
        }

        .btn-secondary {
            background: linear-gradient(45deg, #ffffff, #f0f8ff);
            color: #2266dd;
            border: 2px solid #4488ff;
        }

        .btn-secondary:hover {
            background: linear-gradient(45deg, #666, #999);
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 5px;
            color: #2266dd;
            font-weight: bold;
        }

        input[type="text"], input[type="email"], input[type="password"], input[type="tel"] {
            width: 100%;
            padding: 12px;
            background: #ffffff;
            border: 2px solid #4488ff;
            border-radius: 5px;
            color: #333333;
            font-family: 'Courier New', monospace;
            font-size: 16px;
        }

        input:focus {
            outline: none;
            box-shadow: 0 0 10px rgba(68, 136, 255, 0.5);
            border-color: #2266dd;
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 15px 0;
        }

        .error-message {
            color: #ff4444;
            background: rgba(255, 68, 68, 0.1);
            border: 1px solid #ff4444;
            padding: 10px;
            border-radius: 5px;
            margin: 10px 0;
            display: none;
        }

        .success-message {
            color: #2266dd;
            background: rgba(68, 136, 255, 0.1);
            border: 1px solid #4488ff;
            padding: 10px;
            border-radius: 5px;
            margin: 10px 0;
            display: none;
        }

        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .dashboard-card {
            background: rgba(255, 255, 255, 0.95);
            border: 1px solid #4488ff;
            border-radius: 8px;
            padding: 20px;
            color: #333333;
        }

        .dashboard-card h3 {
            color: #2266dd;
            margin-bottom: 15px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 10px;
        }

        th, td {
            border: 1px solid #4488ff;
            padding: 8px;
            text-align: left;
        }

        th {
            background: rgba(68, 136, 255, 0.2);
            color: #2266dd;
            font-weight: bold;
        }

        .back-btn {
            position: absolute;
            top: 20px;
            left: 20px;
            background: #ffffff;
            border: 2px solid #4488ff;
            color: #2266dd;
            padding: 8px 8px;
            border-radius: 20px;
            cursor: pointer;
            font-family: 'Courier New', monospace;
        }

        .welcome-user {
            text-align: center;
            font-size: 24px;
            margin-bottom: 20px;
            color: #2266dd;
            text-shadow: 0 0 10px #4488ff;
        }

        @media (max-width: 768px) {
            .container {
                padding: 10px;
            }
            
            .btn-container {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 200px;
            }
            
            .dashboard-grid {
                grid-template-columns: 1fr;
            }
        }