/* Basic style reset */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: linear-gradient(135deg, #121212 0%, #1a1a1a 50%, #222222 100%);
            background-attachment: fixed;
            min-height: 100vh;
            color: #e0e0e0;
            overflow-x: hidden;
        }

        .app-container {
            max-width: 500px;
            margin: 0 auto;
            background: #1e1e1e;
            min-height: 100vh;
            position: relative;
            box-shadow: 0 0 20px rgba(0,0,0,0.3);
        }

        /* General section styles */
        .section {
            display: none;
            padding: 20px;
            min-height: 100vh;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }

        .section.active {
            display: flex;
        }

        /* Input section styles */
        #input-section {
            background: linear-gradient(135deg, #121212 0%, #1a1a1a 50%, #222222 100%);
            color: #ffffff;
            text-align: center;
        }

        .logo-container {
            margin-bottom: 40px;
        }

        .logo {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: linear-gradient(135deg, #333333 0%, #444444 50%, #555555 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 40px;
            box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
        }

        .logo::before {
            content: '🤖';
        }

        /* Video styles */
        .logo-container video {
            width: 300px;
            height: 180px;
            border-radius: 12px;
            margin: 20px auto;
            display: block;
            object-fit: cover;
            box-shadow: 0 4px 15px rgba(0,0,0,0.4);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .logo-container video:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(0,0,0,0.5);
        }

        /* Responsive video sizing */
        @media (max-width: 480px) {
            .logo-container video {
                width: 300px;
                height: 167px;
            }
        }

        h1 {
            font-size: 28px;
            margin-bottom: 10px;
            font-weight: 700;
            background: linear-gradient(135deg, #ffffff 0%, #e0e0e0 50%, #cccccc 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 2px 10px rgba(255, 255, 255, 0.2);
        }

        .logo-container p {
            font-size: 16px;
            opacity: 0.9;
            line-height: 1.5;
            color: #b0b0b0;
        }

        .input-container {
            width: 100%;
            max-width: 400px;
        }

        .input-wrapper {
            position: relative;
            margin-bottom: 20px;
        }

        #stock-input {
            width: 100%;
            padding: 16px 20px;
            border: none;
            border-radius: 25px;
            font-size: 12px;
            background: rgba(40, 40, 40, 0.9);
            color: #e0e0e0;
            outline: none;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
            border: 1px solid #333;
        }

        #stock-input:focus {
            background: rgba(60, 60, 60, 0.9);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.4);
        }

        /* Error message styles */
        .error-message {
            color: #ff6b6b;
            font-size: 14px;
            margin-top: 8px;
            text-align: center;
            opacity: 0;
            transform: translateY(-10px);
            transition: all 0.3s ease;
            background: rgba(255, 107, 107, 0.1);
            padding: 8px 16px;
            border-radius: 15px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 107, 107, 0.3);
        }

        .error-message.show {
            opacity: 1;
            transform: translateY(0);
        }

        .analyze-button {
            width: 100%;
            padding: 16px;
            background: linear-gradient(135deg, #25D366 0%, #128C7E 50%, #0d7377 100%);
            border: none;
            border-radius: 25px;
            color: white;
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
        }

        .analyze-button:hover {
            background: linear-gradient(135deg, #128C7E 0%, #0d7377 50%, #075e54 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
        }

        .analyze-button:active {
            transform: translateY(0);
        }

        .input-examples {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 20px;
        }

        .example-tag {
            background: rgba(60, 60, 60, 0.5);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 1px solid rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            color: #e0e0e0;
        }

        .example-tag:hover {
            background: rgba(80, 80, 80, 0.7);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        }

        /* Analysis section styles */
        #analysis-section {
            background: linear-gradient(135deg, #222222 0%, #1a1a1a 50%, #121212 100%);
            text-align: center;
        }

        .analysis-container {
            width: 100%;
            max-width: 400px;
        }

        .ai-avatar {
            position: relative;
            width: 100px;
            height: 100px;
            margin: 0 auto 30px;
        }

        .ai-avatar img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background: linear-gradient(135deg, #333333 0%, #444444 50%, #555555 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 50px;
            color: white;
        }

        .ai-avatar::before {
            content: '🤖';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 50px;
        }

        .pulse-animation {
            position: absolute;
            top: -10px;
            left: -10px;
            right: -10px;
            bottom: -10px;
            border: 3px solid transparent;
            background: linear-gradient(135deg, #333333, #444444, #555555) border-box;
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                transform: scale(1);
                opacity: 1;
            }
            100% {
                transform: scale(1.3);
                opacity: 0;
            }
        }

        #analysis-section h2 {
            font-size: 24px;
            color: white;
            margin-bottom: 10px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        #analysis-status {
            color: rgba(255,255,255,0.8);
            margin-bottom: 30px;
            font-size: 16px;
        }

        .progress-container {
            background: rgba(255,255,255,0.1);
            border-radius: 10px;
            height: 8px;
            margin-bottom: 30px;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, #00c6ff 0%, #0072ff 50%, #667eea 100%);
            border-radius: 10px;
            transition: width 0.2s ease;
            width: 0%;
            box-shadow: 0 2px 10px rgba(0,198,255,0.3);
        }

        .progress-text {
            position: absolute;
            top: -25px;
            right: 0;
            font-size: 14px;
            color: white;
            font-weight: 600;
            text-shadow: 0 1px 5px rgba(0,0,0,0.5);
        }

        .analysis-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }

        .step {
            padding: 15px 10px;
            text-align: center;
            border-radius: 12px;
            background: rgba(60, 60, 60, 0.7);
            box-shadow: 0 4px 15px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
            opacity: 0.6;
            backdrop-filter: blur(10px);
            color: #e0e0e0;
        }

        .step.active {
            opacity: 1;
            background: linear-gradient(135deg, #333333 0%, #444444 100%);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
        }

        .step.completed {
            opacity: 1;
            background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(17, 153, 142, 0.3);
        }

        .step-icon {
            font-size: 24px;
            margin-bottom: 8px;
        }

        .step span {
            font-size: 12px;
            display: block;
            font-weight: 500;
        }

        /* Result section styles */
        #result-section {
            background: linear-gradient(135deg, #1a1a1a 0%, #222222 50%, #2a2a2a 100%);
            text-align: center;
        }

        .result-container {
            width: 100%;
            max-width: 400px;
        }

        .result-header h2 {
            font-size: 24px;
            color: white;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        .stock-info {
            background: rgba(40, 40, 40, 0.9);
            padding: 20px;
            border-radius: 15px;
            margin-bottom: 20px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.4);
            backdrop-filter: blur(10px);
            border: 1px solid #333;
        }

        .stock-symbol {
            font-size: 24px;
            font-weight: 700;
            background: linear-gradient(135deg, #333333 0%, #444444 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 5px;
            display: none;
        }

        .stock-name {
            color: #999;
            margin-bottom: 15px;
            display: none;
        }

        /* Overall Score Display */
        .overall-score {
            color: #e0e0e0;
            margin-bottom: 15px;
            text-align: center;
        }

        .score-label {
            font-size: 14px;
            color: #999;
            margin-bottom: 5px;
        }

        .score-value {
            font-size: 32px;
            font-weight: 700;
            background: linear-gradient(135deg, #333333 0%, #444444 100%);
            color:white;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .score-rating {
            font-size: 14px;
            font-weight: 600;
            margin-top: 5px;
        }

        .score-excellent {
            color: #28a745;
        }

        .score-good {
            color: #17a2b8;
        }

        .score-fair {
            color: #ffc107;
        }

        .score-poor {
            color: #dc3545;
        }

        .whatsapp-container {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.9);
            background: linear-gradient(135deg, #25D366 0%, #128C7E 50%, #0d7377 100%);
            padding: 30px;
            border-radius: 20px;
            color: white;
            z-index: 1000;
            box-shadow: 0 20px 60px rgba(37, 211, 102, 0.4);
            max-width: 350px;
            width: 90%;
            text-align: center;
            transition: all 0.3s ease-out;
            opacity: 1;
        }

        /* Background overlay */
        .whatsapp-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.7);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease-out;
        }

        /* Popup animation */
        @keyframes popIn {
            0% {
                opacity: 0;
                transform: translate(-50%, -50%) scale(0.8);
            }
            100% {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1);
            }
        }

        @keyframes fadeInOverlay {
            to {
                opacity: 1;
            }
        }

        /* Hidden state */
        .whatsapp-container.hidden {
            display: none;
        }

        .whatsapp-overlay.hidden {
            display: none;
        }

        .whatsapp-icon {
            font-size: 40px;
            margin-bottom: 15px;
        }

        .whatsapp-container h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        .whatsapp-container p {
            margin-bottom: 20px;
            opacity: 0.9;
            line-height: 1.5;
        }

        .whatsapp-button {
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            color: #25D366;
            border: none;
            padding: 15px 30px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 15px rgba(255,255,255,0.3);
        }

        .whatsapp-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255,255,255,0.4);
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }

        /* WhatsApp trigger button */
        .whatsapp-trigger-btn {
            background: linear-gradient(135deg, #25D366 0%, #128C7E 50%, #0d7377 100%);
            color: white;
            border: none;
            padding: 18px 35px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
        }

        .whatsapp-trigger-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 35px rgba(37, 211, 102, 0.5);
            background: linear-gradient(135deg, #128C7E 0%, #0d7377 50%, #075e54 100%);
        }

        /* Close button */
        .close-btn {
            position: absolute;
            top: 15px;
            right: 20px;
            width: 30px;
            height: 30px;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 18px;
            font-weight: bold;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .close-btn:hover {
            background: rgba(255,255,255,0.3);
            transform: scale(1.1);
        }

        .restart-button {
            background: rgba(60, 60, 60, 0.7);
            border: 2px solid transparent;
            background-clip: padding-box;
            color: #e0e0e0;
            padding: 12px 30px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            backdrop-filter: blur(10px);
        }

        .restart-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 25px;
            padding: 2px;
            background: linear-gradient(135deg, #333333 0%, #444444 100%);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: exclude;
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask-composite: exclude;
            z-index: -1;
        }

        .restart-button:hover {
            background: linear-gradient(135deg, #333333 0%, #444444 100%);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
        }

        /* Responsive design */
        @media (max-width: 480px) {
            .app-container {
                max-width: 100%;
            }
            
            .section {
                padding: 15px;
            }
            
            h1 {
                font-size: 24px;
            }
            
            .analysis-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* Loading animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Fade in animation */
        .fade-in {
            animation: fadeIn 0.5s ease-in;
        }

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