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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 500px;
        }

        .form-title {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 28px;
            font-weight: 600;
        }

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

        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 500;
            font-size: 14px;
        }

        input[type="text"],
        input[type="email"],
        textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
            font-family: inherit;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        textarea:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        textarea {
            resize: vertical;
            min-height: 120px;
        }

        .submit-btn {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
        }

        .submit-btn:active {
            transform: translateY(0);
        }

        .submit-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .error-message {
            color: #e74c3c;
            font-size: 14px;
            margin-top: 5px;
            display: none;
        }

        .error-message.show {
            display: block;
        }

        .success-message {
            background: #d4edda;
            color: #155724;
            padding: 15px;
            border-radius: 8px;
            margin-top: 20px;
            border: 1px solid #c3e6cb;
            display: none;
            text-align: center;
            font-weight: 500;
        }

        .success-message.show {
            display: block;
        }

        .input-error {
            border-color: #e74c3c !important;
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1) !important;
        }

        .input-success {
            border-color: #27ae60 !important;
            box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.1) !important;
        }

        /* Responsive design */
        @media (max-width: 600px) {
            .container {
                padding: 30px 20px;
                margin: 10px;
            }

            .form-title {
                font-size: 24px;
            }
        }