* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Inter', system-ui, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #2c3e50 0%, #27ae60 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .container {
            max-width: 800px;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 40px;
            padding: 40px;
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        h1 {
            font-size: 2.2rem;
            color: #1e293b;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        h1 svg {
            width: 40px;
            height: 40px;
            stroke: #27ae60;
        }

        .subtitle {
            color: #475569;
            margin-bottom: 30px;
            font-size: 1rem;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 15px;
        }

        .mode-selector {
            display: flex;
            gap: 10px;
            margin-bottom: 25px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .mode-btn {
            flex: 1;
            min-width: 140px;
            padding: 12px 16px;
            border: 2px solid #e2e8f0;
            background: white;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            color: #334155;
            cursor: pointer;
            transition: all 0.2s;
        }

        .mode-btn:hover {
            border-color: #27ae60;
            background: #f0fff4;
        }

        .mode-btn.active {
            background: #27ae60;
            border-color: #27ae60;
            color: white;
        }

        .qr-display {
            background: white;
            border-radius: 30px;
            padding: 30px;
            margin-bottom: 25px;
            text-align: center;
            border: 2px solid #e2e8f0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        #qrCanvas {
            width: 250px;
            height: 250px;
            margin: 0 auto 20px;
            display: block;
        }

        .qr-placeholder {
            width: 250px;
            height: 250px;
            background: #f1f5f9;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 1rem;
            margin: 0 auto 20px;
        }

        .settings-card {
            background: #f8fafc;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            padding: 25px;
            margin-bottom: 25px;
        }

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

        .input-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #1e293b;
        }

        .input-group input,
        .input-group textarea {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s;
            background: white;
        }

        .input-group input:focus,
        .input-group textarea:focus {
            border-color: #27ae60;
        }

        .input-group textarea {
            height: 100px;
            resize: vertical;
        }

        .size-control {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .size-control label {
            color: #475569;
            font-weight: 500;
            min-width: 100px;
        }

        .size-control input {
            flex: 1;
            padding: 10px;
            border: 2px solid #e2e8f0;
            border-radius: 30px;
            text-align: center;
        }

        .wifi-settings, .contact-settings {
            display: none;
        }

        .wifi-settings.visible, .contact-settings.visible {
            display: block;
        }

        .radio-group {
            display: flex;
            gap: 15px;
            margin-bottom: 15px;
        }

        .radio-option {
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }

        .radio-option input[type="radio"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
            accent-color: #27ae60;
        }

        .actions {
            display: flex;
            gap: 15px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .btn {
            flex: 1;
            min-width: 140px;
            padding: 16px;
            border: none;
            border-radius: 60px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary {
            background: #27ae60;
            color: white;
        }

        .btn-primary:hover {
            background: #229954;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(39, 174, 96, 0.3);
        }

        .btn-secondary {
            background: white;
            color: #475569;
            border: 2px solid #e2e8f0;
        }

        .btn-secondary:hover {
            border-color: #27ae60;
            color: #27ae60;
        }

        .info-text {
            margin-top: 20px;
            text-align: center;
            color: #64748b;
            font-size: 0.9rem;
        }

        .info-text a {
            color: #27ae60;
            text-decoration: none;
            font-weight: 600;
        }

        .info-text a:hover {
            text-decoration: underline;
        }

        @media (max-width: 600px) {
            .container {
                padding: 25px;
            }
            
            h1 {
                font-size: 1.8rem;
            }
            
            .mode-btn {
                min-width: 120px;
            }
            
            .btn {
                min-width: 100%;
            }
        }