:root {
            --primary: #274c77;
            --primary-dark: #4f46e5;
            --secondary: #6096ba;
            --dark: #1f2937;
            --light: #f9fafb;
        }
        
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: url('../theme/image/background.svg') no-repeat center center fixed;
            background-size: cover;
            background-color: #f0f3fb;
            min-height: 100vh;
            padding-top: 70px;
        }
        
        .gradient-bg {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        }
        
        .card {
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
            border-radius: 16px;
            transition: all 0.3s ease;
        }
        
        .card:hover {
            box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.15);
            transform: translateY(-2px);
        }
        
        .file-item {
            transition: all 0.3s ease;
            border-left: 4px solid var(--primary);
        }
        
        .file-item.dragging {
            opacity: 0.5;
            transform: scale(0.98);
        }
        
        .file-item:hover {
            transform: translateX(5px);
        }
        
        .drop-zone {
            border: 2px dashed #c3cfe2;
            border-radius: 12px;
            transition: all 0.3s ease;
        }
        
        .drop-zone.active {
            border-color: var(--primary);
            background-color: rgba(99, 102, 241, 0.05);
        }
        
        .progress-bar {
            height: 6px;
            border-radius: 3px;
            background-color: #e5e7eb;
            overflow: hidden;
        }
        
        .progress-value {
            height: 100%;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            transition: width 0.4s ease;
        }
        
        .tooltip {
            position: relative;
        }
        
        .tooltip:hover:after {
            content: attr(data-tooltip);
            position: absolute;
            bottom: 100%;
            left: 50%;
            transform: translateX(-50%);
            padding: 6px 12px;
            background-color: var(--dark);
            color: white;
            border-radius: 4px;
            font-size: 12px;
            white-space: nowrap;
            z-index: 100;
        }
        
        .page-preview {
            background: linear-gradient(45deg, #f3f4f6 25%, transparent 25%, transparent 75%, #f3f4f6 75%),
                        linear-gradient(45deg, #f3f4f6 25%, transparent 25%, transparent 75%, #f3f4f6 75%);
            background-size: 16px 16px;
            background-position: 0 0, 8px 8px;
        }
        
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.5; }
            100% { opacity: 1; }
        }
        
        .pulse {
            animation: pulse 1.5s cubic-bezier(0.4, 0, 0.6, 1) infinite;
        }
        
        .floating-btn {
            box-shadow: 0 4px 14px 0 rgba(0, 0, 0, 0.15);
            transition: all 0.3s ease;
        }
        
        .floating-btn:hover {
            box-shadow: 0 6px 20px 0 rgba(0, 0, 0, 0.2);
            transform: translateY(-2px);
        }
        
        /* Ad container styling */
        .ad-container {
            border-radius: 12px;
            background: transparent;
            border: 1px dashed #e2e8f0;
        }
        
        /* Animation for file addition */
        @keyframes fileAdded {
            0% { transform: scale(0.8); opacity: 0; }
            100% { transform: scale(1); opacity: 1; }
        }
        
        .file-added {
            animation: fileAdded 0.5s ease forwards;
        }
        
        /* Animation for success checkmark */
        @keyframes checkmark {
            0% { transform: scale(0); }
            50% { transform: scale(1.2); }
            100% { transform: scale(1); }
        }
        
        .checkmark {
            animation: checkmark 0.5s ease forwards;
        }
        
        /* Step indicator */
        .step-indicator {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-bottom: 30px;
            max-width: 600px;
        }

@media (max-width: 768px) {
  .step-indicator {
    margin-left: 24p !important;  
    margin-right: 24px !important; 
  }
}

        
        .step-indicator::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 2px;
            background-color: #e5e7eb;
            transform: translateY(-50%);
            z-index: 1;
        }
        
        .step {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: white;
            border: 2px solid #e5e7eb;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: #9ca3af;
            position: relative;
            z-index: 2;
        }
        
        .step.active {
            background-color: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        
        .step.completed {
            background-color: var(--secondary);
            border-color: var(--secondary);
            color: white;
        }
        
        .step-label {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            margin-top: 8px;
            font-size: 12px;
            font-weight: 500;
            color: #6b7280;
            white-space: nowrap;
        }
        
        .step.active .step-label {
            color: var(--primary);
            font-weight: 600;
        }
        
        /* Modal styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 50;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            background-color: white;
            border-radius: 12px;
            width: 90%;
            max-width: 800px;
            max-height: 90vh;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        
        .modal-header {
            padding: 1.25rem;
            border-bottom: 1px solid #e5e7eb;
            display: flex;
            justify-content: between;
            align-items: center;
        }
        
        .modal-body {
            padding: 1.25rem;
            overflow-y: auto;
            flex-grow: 1;
        }
        
        .modal-footer {
            padding: 1.25rem;
            border-top: 1px solid #e5e7eb;
            display: flex;
            justify-content: flex-end;
        }
        
        /* PDF viewer */
        #pdf-viewer {
            width: 100%;
            height: 500px;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            overflow: auto;
            background-color: #f9fafb;
        }
        
        .pdf-page {
            margin-bottom: 20px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }
        
        /* Page selection UI */
        .page-selector {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }
        
        .page-checkbox {
            display: none;
        }
        
        .page-label {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border: 2px solid #e5e7eb;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.2s;
        }
        
        .page-checkbox:checked + .page-label {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }
        
        /* Rotation buttons */
        .rotate-buttons {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }
        
        .rotate-btn {
            padding: 6px 12px;
            background-color: #f3f4f6;
            border: 1px solid #e5e7eb;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.2s;
        }
        
        .rotate-btn:hover {
            background-color: #e5e7eb;
        }

    /* Modern styling additions */
    .modern-header {
        background: var(--primary);
        color: white;
        padding: 3rem 1rem;
        border-radius: 0 0 30px 30px;
        margin-bottom: 3rem;
        position: relative;
        overflow: hidden;
    }
    
    .modern-header::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: var(--primary);
        background-size: 10px 10px;
        transform: rotate(30deg);
        z-index: 0;
    }
    
    .modern-header-content {
        position: relative;
        z-index: 1;
        max-width: 800px;
        margin: 0 auto;
        text-align: center;
    }
    
    .gradient-text {
        background: var(--primary);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .modern-card {
        background: white;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        padding: 2rem;
        margin-bottom: 2rem;
        transition: all 0.3s ease;
        border: 1px solid rgba(0, 0, 0, 0.05);
        position: relative;
        overflow: hidden;
    }
    
    .modern-card::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--primary);
    }
    
    .modern-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    }
    
    .icon-wrapper {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 1.5rem;
    }
    
    .icon-wrapper svg {
        width: 30px;
        height: 30px;
        color: white;
    }
    
    .step-container {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        margin: 2rem 0;
    }
    
    .modern-step {
        display: flex;
        align-items: flex-start;
        gap: 1.5rem;
        padding: 1.5rem;
        background: white;
        border-radius: 12px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        transition: all 0.3s ease;
    }
    
    .modern-step:hover {
        transform: translateX(5px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    }
    
    .step-icon {
        flex-shrink: 0;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-weight: bold;
        font-size: 1.2rem;
    }
    
    .comparison-card {
        background: white;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        padding: 2rem;
        margin-bottom: 2rem;
        overflow: hidden;
    }
    
    .comparison-header {
        display: flex;
        justify-content: space-between;
        padding: 1rem 1.5rem;
        background: var(--primary);
        color: white;
        border-radius: 12px 12px 0 0;
        margin: -2rem -2rem 2rem -2rem;
    }
    
    .comparison-row {
        display: flex;
        justify-content: space-between;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid #f1f3f4;
    }
    
    .comparison-row:last-child {
        border-bottom: none;
    }
    
    .comparison-feature {
        flex: 1;
        font-weight: 500;
    }
    
    .comparison-basic, .comparison-pro {
        flex: 1;
        text-align: center;
    }
    
    .checkmark {
        color: #10b981;
        font-weight: bold;
    }
    
    .crossmark {
        color: #ef4444;
        font-weight: bold;
    }
    
    .use-case-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
        margin: 2rem 0;
    }
    
    .use-case-card {
        background: white;
        border-radius: 12px;
        padding: 1.5rem;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        transition: all 0.3s ease;
        border-top: 4px solid #667eea;
    }
    
    .use-case-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    }
    
    .faq-item {
        margin-bottom: 1.5rem;
        background: white;
        border-radius: 12px;
        padding: 1.5rem;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    }
    
    .faq-question {
        font-weight: 600;
        margin-bottom: 0.5rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    .faq-question::before {
        content: "•";
        color: #667eea;
        font-size: 1.5rem;
    }
    
    .cta-section {
        background: var(--secondary);
        color: white;
        padding: 3rem 2rem;
        border-radius: 20px;
        text-align: center;
        margin: 3rem 0;
    }
    
    .cta-button {
        display: inline-block;
        background: white;
        color: #667eea;
        padding: 0.8rem 2rem;
        border-radius: 50px;
        font-weight: 600;
        text-decoration: none;
        margin-top: 1.5rem;
        transition: all 0.3s ease;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    }
    
    .cta-button:hover {
        transform: translateY(-3px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }
    
    /* Responsive adjustments */
    @media (max-width: 768px) {
        .modern-step {
            flex-direction: column;
            text-align: center;
        }
        
        .comparison-header, .comparison-row {
            flex-direction: column;
            text-align: center;
        }
        
        .comparison-feature, .comparison-basic, .comparison-pro {
            margin-bottom: 0.5rem;
        }
        
        .use-case-grid {
            grid-template-columns: 1fr;
        }
    }
    
    /* Animation enhancements */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .animate-fade-in-up {
        animation: fadeInUp 0.6s ease-out forwards;
    }
    
    .delay-100 {
        animation-delay: 0.1s;
    }
    
    .delay-200 {
        animation-delay: 0.2s;
    }
    
    .delay-300 {
        animation-delay: 0.3s;
    }
    
    /* Enhanced keyword styling */
    .keyword {
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
        padding: 0.2rem 0.6rem;
        border-radius: 6px;
        font-family: 'Inter', sans-serif;
        font-size: 0.9rem;
        font-weight: 500;
        color: #667eea;
        border: 1px solid rgba(102, 126, 234, 0.2);
    }