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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);
            color: #e0e0e0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Header */
        .header {
            background: rgba(20, 20, 35, 0.95);
            backdrop-filter: blur(10px);
            padding: 1rem 2rem;
            box-shadow: 0 2px 20px rgba(0, 123, 255, 0.1);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 1.8rem;
            font-weight: bold;
            color: #007bff;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .logo:hover {
            transform: scale(1.05);
            text-shadow: 0 0 20px rgba(0, 123, 255, 0.5);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: transparent;
            border-radius: 8px;
            margin-right: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            flex-shrink: 0;
        }

        .logo-icon img {
            width: 40px;
            height: 40px;
            object-fit: cover;
            object-position: center;
            border-radius: 8px;
        }

        .nav-buttons {
            display: flex;
            gap: 1rem;
        }

        .nav-btn {
            padding: 0.7rem 1.5rem;
            background: transparent;
            color: #e0e0e0;
            border: 2px solid #007bff;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 500;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .nav-btn:hover {
            background: #007bff;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 123, 255, 0.4);
        }

        .nav-btn.primary {
            background: linear-gradient(135deg, #007bff, #0056b3);
            border: none;
        }

        .nav-btn.primary:hover {
            background: linear-gradient(135deg, #0056b3, #003d82);
            box-shadow: 0 5px 20px rgba(0, 123, 255, 0.6);
        }

        /* Feedback Container */
        .feedback-container {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem;
        }

        .feedback-box {
            background: rgba(30, 30, 50, 0.7);
            border-radius: 20px;
            padding: 3rem;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 123, 255, 0.2);
            max-width: 600px;
            width: 100%;
            box-shadow: 0 10px 40px rgba(0, 123, 255, 0.2);
            animation: fadeIn 0.6s ease-out;
        }

        .feedback-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .feedback-header h1 {
            font-size: 2.5rem;
            background: linear-gradient(135deg, #007bff, #00d4ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 0.5rem;
        }

        .feedback-header p {
            color: #a0a0a0;
            font-size: 1rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #e0e0e0;
            font-weight: 500;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 1rem;
            background: rgba(20, 20, 35, 0.8);
            border: 2px solid rgba(0, 123, 255, 0.3);
            border-radius: 10px;
            color: #e0e0e0;
            font-size: 1rem;
            transition: all 0.3s ease;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #007bff;
            box-shadow: 0 0 20px rgba(0, 123, 255, 0.3);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: #666;
        }

        .form-group select {
            cursor: pointer;
        }

        .form-group select option {
            background: #1a1a2e;
            color: #e0e0e0;
        }

        /* Rating System */
        .rating-group {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 1rem 0;
        }

        .star {
            font-size: 2rem;
            color: #666;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .star:hover,
        .star.active {
            color: #ffd700;
            transform: scale(1.2);
            text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
        }

        .submit-btn {
            width: 100%;
            padding: 1rem;
            background: linear-gradient(135deg, #007bff, #0056b3);
            border: none;
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 20px rgba(0, 123, 255, 0.3);
            margin-top: 1rem;
        }

        .submit-btn:hover {
            background: linear-gradient(135deg, #0056b3, #003d82);
            transform: translateY(-2px);
            box-shadow: 0 7px 25px rgba(0, 123, 255, 0.5);
        }

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

        /* Footer */
        .footer {
            text-align: center;
            padding: 2rem;
            border-top: 1px solid rgba(0, 123, 255, 0.2);
            color: #666;
        }

        /* Animations */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive */
        @media (max-width: 768px) {
            .feedback-box {
                padding: 2rem;
            }

            .feedback-header h1 {
                font-size: 2rem;
            }

            .nav-buttons {
                gap: 0.5rem;
            }

            .nav-btn {
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
            }

            .rating-group {
                gap: 0.5rem;
            }

            .star {
                font-size: 1.5rem;
            }
        }

        /* Particles background */
        .particle {
            position: fixed;
            width: 2px;
            height: 2px;
            background: #007bff;
            border-radius: 50%;
            pointer-events: none;
            opacity: 0.5;
            z-index: -1;
        }

        /* Success Message */
        .success-message {
            display: none;
            background: rgba(40, 167, 69, 0.2);
            border: 2px solid #28a745;
            border-radius: 10px;
            padding: 1rem;
            margin-bottom: 1.5rem;
            color: #28a745;
            text-align: center;
            animation: slideIn 0.5s ease-out;
        }

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

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }