:root {
            --primary: #4361ee;
            --secondary: #3f37c9;
            --success: #4cc9f0;
            --dark: #1d3557;
            --light: #f8f9fa;
            --gray: #6c757d;
            --danger: #e63946;
            --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #1d3557, #457b9d);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
            color: #333;
        }

        .container {
            width: 100%;
            max-width: 900px;
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            display: flex;
            min-height: 600px;
            animation: fadeIn 0.8s ease-out;
        }

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

        .welcome-section {
            flex: 1;
            background: linear-gradient(to bottom right, var(--primary), var(--secondary));
            color: white;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .welcome-section::before {
            content: "";
            position: absolute;
            width: 200%;
            height: 200%;
            top: -50%;
            left: -50%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
            transform: rotate(30deg);
        }

        .welcome-section h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            z-index: 2;
        }

        .welcome-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 350px;
            margin-bottom: 30px;
            z-index: 2;
        }

        .features {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            margin-top: 20px;
            z-index: 2;
        }

        .feature {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border-radius: 10px;
            padding: 12px 20px;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .content-section {
            flex: 1;
            padding: 40px;
            display: flex;
            flex-direction: column;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 30px;
        }

        .logo i {
            font-size: 2rem;
            color: var(--primary);
        }

        .logo h2 {
            font-size: 1.8rem;
            color: var(--dark);
        }

        .form-container {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .page {
            display: none;
            animation: slideIn 0.4s ease-out;
        }

        .page.active {
            display: block;
        }

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

        h3 {
            font-size: 1.8rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .subtitle {
            color: var(--gray);
            margin-bottom: 30px;
            font-size: 1rem;
        }

        .form-group {
            margin-bottom: 20px;
            position: relative;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }

        input {
            width: 100%;
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
        }

        input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
            outline: none;
        }

        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
            margin-top: 10px;
        }

        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }

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

        .btn:disabled {
            background: #ccc;
            cursor: not-allowed;
            transform: none;
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(67, 97, 238, 0.1);
        }

        .search-container {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }

        .search-container input {
            flex: 1;
        }

        .search-container button {
            padding: 0 20px;
            width: auto;
        }

        .results-container {
            margin-top: 30px;
            max-height: 300px;
            overflow-y: auto;
            padding-right: 10px;
        }

        .result-item {
            display: flex;
            align-items: center;
            padding: 15px;
            border-radius: 10px;
            margin-bottom: 12px;
            background: #f9f9f9;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
        }

        .result-item:hover {
            background: #f0f4ff;
            transform: translateX(5px);
        }

        .result-item.selected {
            border-color: var(--primary);
            background: #eef2ff;
        }

        .result-item i {
            font-size: 1.5rem;
            color: var(--primary);
            margin-right: 15px;
        }

        .result-info {
            flex: 1;
        }

        .result-title {
            font-weight: 600;
            margin-bottom: 5px;
        }

        .result-details {
            font-size: 0.9rem;
            color: var(--gray);
            display: flex;
            gap: 15px;
        }

        .download-section {
            margin-top: 30px;
            padding: 20px;
            background: #f8f9fa;
            border-radius: 15px;
            display: none;
        }

        .download-section.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

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

        .download-icon {
            width: 60px;
            height: 60px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            font-size: 1.5rem;
        }

        .download-actions {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }

        .download-btn {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
        }

        .back-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            background: none;
            border: none;
            font-size: 0.9rem;
            cursor: pointer;
            margin-bottom: 20px;
            padding: 5px;
            transition: var(--transition);
        }

        .back-btn:hover {
            color: var(--secondary);
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            border-radius: 10px;
            color: white;
            font-weight: 500;
            box-shadow: var(--card-shadow);
            display: flex;
            align-items: center;
            gap: 10px;
            z-index: 1000;
            transform: translateX(200%);
            transition: transform 0.3s ease;
        }

        .notification.show {
            transform: translateX(0);
        }

        .notification.success {
            background: #4CAF50;
        }

        .notification.error {
            background: #f44336;
        }

        .notification.info {
            background: #2196F3;
        }

        .notification.warning {
            background: #FF9800;
        }

        .spinner {
            width: 24px;
            height: 24px;
            border: 3px solid rgba(255,255,255,0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
            display: inline-block;
        }

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

        .loading {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 40px;
        }

        .api-info {
            background: #f0f7ff;
            border-left: 4px solid var(--primary);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            font-size: 0.9rem;
        }

        .api-info h4 {
            margin-bottom: 8px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .api-info pre {
            background: #e6f2ff;
            padding: 10px;
            border-radius: 5px;
            overflow-x: auto;
            font-size: 0.85rem;
            margin-top: 10px;
        }

        .status-badge {
            display: inline-block;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: bold;
            margin-left: 10px;
        }

        .status-success {
            background: #4CAF50;
            color: white !important;
        }

        .status-error {
            background: #f44336;
            color: white;
        }

        .status-warning {
            background: #FF9800;
            color: white;
        }

        .form-footer {
            text-align: center;
            margin-top: 20px;
            font-size: 0.9rem;
            color: var(--gray);
        }

        .form-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .form-footer a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }

        .verification-code {
            display: flex;
            gap: 10px;
        }

        .verification-code input {
            flex: 1;
        }

        .verification-code button {
            width: 140px;
            padding: 0;
        }

        .countdown {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .password-container {
            position: relative;
        }

        .toggle-password {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: var(--gray);
        }

        .update-cookie-btn {
            position: absolute;
            top: 30px;
            right: 40px;
            background: #f0f7ff;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .update-cookie-btn:hover {
            background: #e6f2ff;
        }

        .qrcode-section {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 20px;
            margin-bottom: 20px;
            text-align: center;
        }

        .qrcode-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            margin-bottom: 15px;
        }

        .qrcode-placeholder {
            width: 200px;
            height: 200px;
            background: #f0f0f0;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 10px;
            margin-bottom: 15px;
        }

        .qrcode-placeholder i {
            font-size: 3rem;
            color: #ccc;
        }

        .qrcode-instruction {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 10px;
            text-align: center;
        }

        .qrcode-status {
            font-weight: 500;
            margin-top: 10px;
        }

        .status-scanning {
            color: var(--primary);
        }

        .status-success {
            color: #4CAF50;
        }

        .status-error {
            color: #f44336;
        }

        .qrcode-refresh {
            margin-top: 10px;
            color: var(--primary);
            background: none;
            border: none;
            cursor: pointer;
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .container {
                flex-direction: column;
                max-width: 500px;
            }

            .welcome-section {
                padding: 30px 20px;
            }

            .features {
                display: none;
            }

            .update-cookie-btn {
                position: relative;
                top: 0;
                right: 0;
                margin-bottom: 15px;
            }
        }

        @media (max-width: 480px) {
            .content-section {
                padding: 25px;
            }

            h3 {
                font-size: 1.5rem;
            }

            .search-container {
                flex-direction: column;
            }

            .download-actions {
                flex-direction: column;
            }

            .verification-code {
                flex-direction: column;
            }

            .verification-code button {
                width: 100%;
                padding: 14px;
            }

            .qrcode-placeholder {
                width: 180px;
                height: 180px;
            }
        }