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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background: #f0f4f3;
            color: #333;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .header {
            background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
            margin-bottom: 30px;
        }

        .header h1 {
            text-align: center;
            font-size: 2.5em;
            margin-bottom: 10px;
        }

        .header .subtitle {
            text-align: center;
            opacity: 0.9;
            font-size: 1.1em;
        }

        .nav {
            background: white;
            padding: 15px;
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(0,0,0,0.12);
            margin-bottom: 30px;
            border: 2px solid #e8f5e8;
        }

        .nav ul {
            list-style: none;
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .nav a {
            color: #4CAF50;
            text-decoration: none;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .nav a:hover,
        .nav a.active {
            background: #e8f5e8;
            transform: translateY(-2px);
        }

        .card {
            background: white;
            padding: 30px;
            border-radius: 24px;
            box-shadow: 0 12px 48px rgba(0,0,0,0.15);
            margin-bottom: 30px;
            border: 2px solid #e8f5e8;
        }

        .btn-primary {
            background: linear-gradient(145deg, #4CAF50, #45a049);
            color: white;
            border: none;
            padding: 16px 36px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 
                0 6px 20px rgba(76, 175, 80, 0.3),
                inset 0 1px 0 rgba(255,255,255,0.2);
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 
                0 8px 25px rgba(76, 175, 80, 0.4),
                inset 0 1px 0 rgba(255,255,255,0.2);
        }

        .btn-secondary {
            background: white;
            color: #4CAF50;
            border: 2px solid #4CAF50;
            padding: 12px 24px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn-secondary:hover {
            background: #4CAF50;
            color: white;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #555;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #4CAF50;
        }

        .form-group textarea {
            height: 120px;
            resize: vertical;
        }

        .alert {
            padding: 15px 20px;
            border-radius: 8px;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .alert-success {
            background: #e8f5e8;
            color: #2e7d32;
            border: 1px solid #4CAF50;
        }

        .alert-error {
            background: #ffebee;
            color: #c62828;
            border: 1px solid #f44336;
        }

        .footer {
            text-align: center;
            padding: 40px 20px;
            color: #666;
            margin-top: 60px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 10px;
            }
            
            .header h1 {
                font-size: 2em;
            }
            
            .nav ul {
                flex-direction: column;
                align-items: center;
            }
        }