*{margin:0;padding:0;box-sizing:border-box}:root{--primary-50: #eff6ff;--primary-100: #dbeafe;--primary-200: #bfdbfe;--primary-300: #93c5fd;--primary-400: #60a5fa;--primary-500: #3b82f6;--primary-600: #2563eb;--primary-700: #1d4ed8;--primary-800: #1e40af;--primary-900: #1e3a8a;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-400: #9ca3af;--gray-500: #6b7280;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--success-500: #10b981;--success-600: #059669;--warning-500: #f59e0b;--warning-600: #d97706;--error-500: #ef4444;--error-600: #dc2626;--border-radius-sm: 6px;--border-radius-md: 8px;--border-radius-lg: 12px;--border-radius-xl: 16px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition-all: all .2s cubic-bezier(.4, 0, .2, 1);--transition-colors: color .2s cubic-bezier(.4, 0, .2, 1), background-color .2s cubic-bezier(.4, 0, .2, 1);--transition-transform: transform .2s cubic-bezier(.4, 0, .2, 1);--bg-primary: #ffffff;--bg-secondary: var(--gray-50);--bg-tertiary: var(--gray-100);--text-primary: var(--gray-900);--text-secondary: var(--gray-600);--text-tertiary: var(--gray-500);--border-primary: var(--gray-200);--border-secondary: var(--gray-300);--accent-primary: var(--primary-600);--accent-hover: var(--primary-700)}.dark-mode{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-tertiary: #94a3b8;--border-primary: #334155;--border-secondary: #475569;--accent-primary: #3b82f6;--accent-hover: #60a5fa;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .3), 0 2px 4px -2px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .3), 0 4px 6px -4px rgb(0 0 0 / .3);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .3), 0 8px 10px -6px rgb(0 0 0 / .3)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"rlig" 1,"calt" 1}#root{min-height:100vh}.home-container{max-width:1200px;margin:0 auto;padding:3rem 1rem}.home-header{text-align:center;margin-bottom:3rem}.home-title{font-size:2.75rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(135deg,var(--accent-primary),var(--primary-500),var(--primary-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em;line-height:1.1}.home-subtitle{font-size:1.25rem;color:var(--text-secondary);margin:0;font-weight:400;line-height:1.5;opacity:.9}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:2rem;margin:4rem 0}.tool-banner{display:flex;align-items:center;padding:2rem;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--border-radius-xl);cursor:pointer;transition:var(--transition-all);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.tool-banner:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,var(--accent-primary),transparent);opacity:.05;transition:var(--transition-transform)}.tool-banner:hover:before{left:100%}.tool-banner:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-xl);transform:translateY(-4px) scale(1.01);background:var(--bg-primary)}.tool-banner:focus{outline:2px solid var(--accent-primary);outline-offset:2px}.tool-icon-large{font-size:3rem;margin-right:1.5rem;flex-shrink:0;transition:var(--transition-transform);filter:drop-shadow(0 2px 4px rgba(0,0,0,.1))}.tool-banner:hover .tool-icon-large{transform:scale(1.1) rotate(5deg)}.tool-content{flex:1;min-width:0}.tool-category{font-size:.8rem;font-weight:600;text-transform:uppercase;color:var(--accent-primary);margin-bottom:.5rem;letter-spacing:.08em;opacity:.9}.tool-title{font-size:1.375rem;font-weight:700;color:var(--text-primary);margin:0 0 .75rem;line-height:1.2}.tool-description{font-size:.95rem;color:var(--text-secondary);margin:0;line-height:1.6;opacity:.8}.tool-arrow{font-size:1.75rem;color:var(--accent-primary);margin-left:1.5rem;transition:var(--transition-transform);flex-shrink:0;opacity:.7}.tool-banner:hover .tool-arrow{transform:translate(8px) scale(1.2);opacity:1}.home-features{background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--border-radius-xl);padding:3rem 2rem;margin-top:4rem;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.home-features:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent-primary),transparent);opacity:.3}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-item{display:flex;align-items:center;text-align:center;flex-direction:column;padding:1.5rem;border-radius:var(--border-radius-lg);transition:var(--transition-transform);background:var(--bg-secondary);border:1px solid var(--border-primary)}.feature-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.feature-icon{font-size:2.5rem;margin-bottom:1rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,.1));transition:var(--transition-transform)}.feature-item:hover .feature-icon{transform:scale(1.1)}.feature-text{font-size:1rem;color:var(--text-secondary);font-weight:500;line-height:1.5;opacity:.9}@media (min-width: 1024px) and (max-width: 1279px){.home-container{padding:2.5rem 2rem}.home-title{font-size:2.5rem}.tools-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem}.tool-banner{padding:1.5rem}}@media (min-width: 768px) and (max-width: 1023px){.home-container{padding:2rem 1.5rem}.home-title{font-size:2.25rem}.home-subtitle{font-size:1.125rem}.tools-grid{grid-template-columns:repeat(2,1fr);gap:1.5rem;margin:3rem 0}.tool-banner{padding:1.5rem}.tool-icon-large{font-size:2.5rem;margin-right:1rem}.feature-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width: 767px){.home-container{padding:1.5rem 1rem}.home-title{font-size:2rem}.home-subtitle{font-size:1rem}.tools-grid{grid-template-columns:1fr;gap:1.5rem;margin:2.5rem 0}.tool-banner{padding:1.75rem 1.5rem;border-radius:var(--border-radius-lg);min-height:140px}.tool-icon-large{font-size:2.5rem;margin-right:1.25rem}.tool-category{font-size:.75rem;margin-bottom:.5rem}.tool-title{font-size:1.2rem;margin-bottom:.5rem}.tool-description{font-size:.9rem;line-height:1.5}.tool-arrow{font-size:1.5rem;margin-left:1rem}.feature-grid{grid-template-columns:1fr;gap:1.5rem}.feature-item{padding:1.5rem 1rem}.feature-icon{font-size:2rem;margin-bottom:1rem}.feature-text{font-size:.9rem;line-height:1.5}.home-features{padding:2rem 1.5rem;margin-top:3rem}}@media (max-width: 479px){.home-container{padding:1rem .75rem}.home-title{font-size:1.75rem}.home-subtitle{font-size:.95rem}.tool-banner{flex-direction:column;text-align:center;padding:2rem 1rem;min-height:180px}.tool-icon-large{margin-right:0;margin-bottom:1.25rem;font-size:3.5rem}.tool-content{margin-bottom:1rem}.tool-category{font-size:.75rem;margin-bottom:.75rem}.tool-title{font-size:1.25rem;margin-bottom:.75rem}.tool-description{font-size:.9rem}.tool-arrow{margin-left:0;margin-top:.75rem;font-size:1.75rem}.feature-grid{gap:1.25rem}.feature-item{padding:1.5rem 1rem}.feature-icon{font-size:2.25rem}.home-features{padding:2rem 1rem;margin-top:2.5rem}}.app{min-height:100vh;background:var(--bg-secondary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;display:flex;flex-direction:column;color:var(--text-primary);transition:var(--transition-colors)}.top-menu{background:var(--bg-primary);border-bottom:1px solid var(--border-primary);position:sticky;top:0;z-index:100;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-sm);transition:var(--transition-colors)}.menu-container{max-width:1440px;margin:0 auto;padding:0 2rem;display:flex;align-items:center;justify-content:space-between;gap:2rem;min-height:72px;transition:var(--transition-all)}.logo-section{display:flex;align-items:center;gap:.75rem;text-decoration:none;color:inherit}.logo-section:hover{text-decoration:none;color:inherit}.app-logo{height:48px;width:48px;object-fit:contain;flex-shrink:0;transition:var(--transition-transform)}.app-logo:hover{transform:scale(1.05)}.dark-mode .app-logo{filter:invert(1) brightness(.9)}.brand-info{display:flex;flex-direction:column}.brand-name{font-size:1.75rem;font-weight:700;margin:0;color:var(--text-primary);letter-spacing:-.02em;background:linear-gradient(135deg,var(--accent-primary),var(--primary-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.brand-tagline{font-size:.875rem;color:var(--text-secondary);font-weight:500;margin:0;opacity:.8}.menu-tabs{display:flex;gap:.5rem;align-items:center}.menu-tab{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;border:1px solid var(--border-primary);background:var(--bg-primary);color:var(--text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;transition:var(--transition-all);text-decoration:none;border-radius:var(--border-radius-md);position:relative;overflow:hidden}.menu-tab:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,var(--accent-primary),transparent);opacity:.1;transition:var(--transition-transform)}.menu-tab:hover:before{left:100%}.menu-tab:hover{background:var(--bg-tertiary);color:var(--accent-primary);border-color:var(--accent-primary);transform:translateY(-1px);box-shadow:var(--shadow-md)}.menu-tab.active{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.tab-icon{font-size:1rem;transition:var(--transition-transform)}.menu-tab:hover .tab-icon{transform:scale(1.1)}.tab-text{font-weight:500;white-space:nowrap}.dark-mode-toggle{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;border:1px solid var(--border-primary);background:var(--bg-primary);color:var(--text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;transition:var(--transition-all);text-decoration:none;border-radius:var(--border-radius-md);position:relative;overflow:hidden}.dark-mode-toggle:hover{background:var(--bg-tertiary);color:var(--accent-primary);border-color:var(--accent-primary);transform:translateY(-1px);box-shadow:var(--shadow-md)}.toggle-icon{font-size:1rem;transition:var(--transition-transform)}.dark-mode-toggle:hover .toggle-icon{transform:rotate(15deg) scale(1.1)}.toggle-text{font-weight:500;white-space:nowrap}.app-content{flex:1;padding:2rem;max-width:1440px;margin:0 auto;width:100%;background:var(--bg-secondary);transition:var(--transition-colors)}.pdf-tools-header{margin-bottom:2rem}.pdf-tool-tabs{display:flex;justify-content:center;gap:0;margin-bottom:2rem;flex-wrap:wrap}.tool-tab{display:flex;align-items:center;gap:.5rem;padding:1rem 2rem;border:2px solid #000000;background:#fff;color:#000;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;text-decoration:none;border-radius:0;margin-left:-2px}.tool-tab:first-child{margin-left:0}.tool-tab:hover,.tool-tab.active{background:#000;color:#fff}.tool-icon{font-size:1.2rem}.tool-text{font-weight:500}.compression-settings{background:#fafafa;border:1px solid #000000;padding:1.5rem;margin:2rem 0}.compression-settings h3{margin:0 0 1rem;color:#000;font-size:1.1rem;font-weight:600}.compression-levels{display:flex;flex-direction:column;gap:1rem}.compression-option{display:flex;align-items:center;gap:1rem;cursor:pointer;padding:1rem;border:1px solid #cccccc;background:#fff;transition:all .2s ease}.compression-option:hover{border-color:#000;background:#f8f8f8}.compression-option input[type=radio]{margin:0;transform:scale(1.2)}.compression-info{display:flex;flex-direction:column;gap:.25rem}.compression-label{font-weight:600;color:#000}.compression-description{font-size:.9rem;color:#666}.compression-results{display:flex;flex-direction:column;gap:1rem}.result-item{display:flex;justify-content:space-between;align-items:center;padding:1rem;border:1px solid #cccccc;background:#fff}.result-info{display:flex;flex-direction:column;gap:.5rem}.result-filename{font-weight:600;color:#000}.size-comparison{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:#666}.compression-savings{color:#000;font-weight:600}.bulk-download{text-align:center;margin-top:1rem;padding-top:1rem;border-top:1px solid #cccccc}.app-header{text-align:center;color:#000;margin-bottom:2rem;padding:2rem 0;border-bottom:1px solid #cccccc}.logo-container{margin-bottom:1rem}.app-header h1{font-size:2.5rem;margin:0;font-weight:300;letter-spacing:-1px}.app-header p{font-size:1.1rem;margin:1rem 0 0;color:#666;font-weight:300}.app-main{max-width:1200px;width:100%;margin:0 auto;background:var(--bg-primary);padding:2.5rem;border:1px solid var(--border-primary);border-radius:var(--border-radius-xl);box-shadow:var(--shadow-lg);transition:var(--transition-colors)}.dark-mode .app-header{color:#e1e1e6;border-bottom:1px solid #262626}.dark-mode .app-header h1{color:#e1e1e6}.dark-mode .app-header p{color:#9ca3af}.dark-mode .app-main{background:#0a0a0a;border:1px solid #262626}.upload-section{margin-bottom:2rem}.upload-label{display:inline-flex;align-items:center;justify-content:center;padding:1rem 2rem;background:var(--accent-primary);color:#fff;border:2px solid var(--accent-primary);cursor:pointer;font-weight:600;transition:var(--transition-all);border-radius:var(--border-radius-lg);font-size:1rem;text-transform:none;letter-spacing:0;box-shadow:var(--shadow-md);position:relative;overflow:hidden}.upload-label:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:var(--transition-transform)}.upload-label:hover:not(.disabled):before{left:100%}.upload-label:hover:not(.disabled){background:var(--accent-hover);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.upload-label.disabled{opacity:.6;cursor:not-allowed;pointer-events:none;transform:none;box-shadow:var(--shadow-sm)}.file-input{display:none}.text-input{width:100%;padding:.75rem;font-size:1rem;border:2px solid #e0e0e0;border-radius:8px;outline:none;transition:border-color .3s;background:#fff;color:#000}.text-input:focus{border-color:#4285f4}.dark-mode .text-input{background:#1a1a1a;color:#e1e1e6;border:2px solid #262626}.dark-mode .text-input:focus{border-color:#a855f7}.tooltip{color:#4285f4;margin-left:.5rem;cursor:help}.dark-mode .tooltip{color:#a855f7}.description-text{color:#666;font-size:.95em}.dark-mode .description-text{color:#9ca3af}.hint-text{font-size:.9em;color:#666;margin-top:.5rem;line-height:1.4}.dark-mode .hint-text{color:#9ca3af}.detail-text{font-size:.85em;color:#666}.dark-mode .detail-text{color:#9ca3af}.method-text{font-size:.85em;color:#666;margin-bottom:.25rem}.dark-mode .method-text{color:#9ca3af}.info-text{color:#666}.dark-mode .info-text{color:#9ca3af}.info-text-light{color:#888}.dark-mode .info-text-light{color:#6b7280}.file-table-container{margin-top:2rem;padding:1.5rem;background:#fafafa;border:1px solid #000000}.dark-mode .upload-label{background:#a855f7;color:#fff;border:2px solid #a855f7}.dark-mode .upload-label:hover:not(.disabled){background:#9333ea;color:#fff}.dark-mode .file-table-container{background:#1a1a1a;border:1px solid #262626}.dark-mode .file-table-container h3{color:#e1e1e6}.file-table-container h3{margin:0 0 1rem;color:#000;font-size:1.1rem;font-weight:600}.file-table-wrapper{max-height:600px;overflow-y:auto;border:1px solid #000000}.dark-mode .file-table-wrapper{border:1px solid #262626}.dark-mode .file-table{background:#0a0a0a}.dark-mode .file-table thead{background:#1a1a1a}.dark-mode .file-table th{color:#e1e1e6;border-bottom:2px solid #262626;background:#0a0a0a}.dark-mode .file-table td{border-bottom:1px solid #262626}.dark-mode .file-table tbody tr:hover{background:#1a1a1a}.dark-mode .file-table tbody tr.invalid-file{background-color:#2a1a1a!important;border-left:4px solid #ef4444}.dark-mode .file-table tbody tr.invalid-file:hover{background-color:#3a1a1a!important}.dark-mode .file-name{color:#e1e1e6}.dark-mode .file-size{color:#9ca3af}.dark-mode .status-valid{color:#10b981}.dark-mode .status-invalid{color:#ef4444}.dark-mode .status-pending{color:#f59e0b}.dark-mode .remove-button{border:1px solid #262626;color:#e1e1e6}.dark-mode .remove-button:hover{background:#ef4444;color:#fff;border-color:#ef4444}.file-table{width:100%;border-collapse:collapse;background:#fff;font-size:1rem}.mobile-file-list{display:none}.file-table thead{background:#f8f8f8;position:sticky;top:0;z-index:10}.file-table th{padding:1rem .75rem;text-align:left;font-weight:600;color:#000;border-bottom:2px solid #000000;background:#fff}.file-table td{padding:.75rem;border-bottom:1px solid #cccccc;vertical-align:middle}.file-table tbody tr:hover{background:#f8f8f8}.file-table tbody tr.invalid-file{background-color:#f5f5f5!important;border-left:4px solid #000000}.file-table tbody tr.invalid-file:hover{background-color:#eee!important}.file-name{font-weight:500;color:#000;max-width:400px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-icon{margin-right:6px}.file-size{color:#666;font-family:Courier New,monospace;font-size:.85rem}.file-status{font-size:.85rem;font-weight:500}.file-action{text-align:center}.remove-button{background:none;border:1px solid #000000;cursor:pointer;padding:.25rem .5rem;border-radius:0;font-size:1rem;color:#000;transition:all .2s ease}.remove-button:hover{background:#000;color:#fff}.file-list-wrapper{border:1px solid #000000;overflow:auto;max-height:600px}.dark-mode .file-list-wrapper{border:1px solid #262626}.desktop-file-headers{display:none}.unified-file-list{background:#fff}.dark-mode .unified-file-list{background:#0a0a0a}.unified-file-item{background:#fff;border-bottom:1px solid #e0e0e0;padding:1rem;position:relative;cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none;transition:all .2s ease}.unified-file-item:active{cursor:grabbing}.unified-file-item:hover{background:#f8f8f8}.unified-file-item.dragging{opacity:.8;transform:rotate(1deg) scale(1.02);box-shadow:0 8px 25px #00000026;z-index:1000;cursor:grabbing}.unified-file-item.invalid-file{background-color:#f5f5f5!important;border-left:4px solid #000000}.unified-file-item.invalid-file:hover{background-color:#eee!important}.dark-mode .unified-file-item{background:#1a1a1a;border-color:#374151}.dark-mode .unified-file-item:hover{background:#262626}.dark-mode .unified-file-item.dragging{box-shadow:0 8px 25px #ffffff1a}.dark-mode .unified-file-item.invalid-file{background:#2d1b1b!important;border-left-color:#ef4444}.dark-mode .unified-file-item.invalid-file:hover{background:#3a2020!important}.unified-file-row-1{display:flex;align-items:center;gap:.5rem}.unified-file-row-2{display:flex;align-items:center;justify-content:space-between;margin-top:.5rem}.unified-file-icon{font-size:1rem;flex-shrink:0}.unified-file-name{flex:1;font-size:.9rem;font-weight:500;color:#000;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:.5rem}.dark-mode .unified-file-name{color:#e1e1e6}.unified-file-size{font-size:.8rem;color:#666;font-family:Courier New,monospace;flex-shrink:0}.dark-mode .unified-file-size{color:#9ca3af}.unified-file-status{font-size:.85rem;font-weight:500;flex-shrink:0}.unified-status{font-size:1rem;flex-shrink:0}.status-valid{color:#000;font-weight:500}.status-invalid{color:#666;font-weight:500}.status-pending{color:#333;font-weight:500}.unified-remove-button{background:none;border:1px solid #e0e0e0;cursor:pointer;padding:.3rem .6rem;border-radius:4px;font-size:.8rem;color:#666;transition:all .2s ease;flex-shrink:0}.unified-remove-button:hover{background:#f5f5f5;color:#000}.dark-mode .unified-remove-button{border-color:#374151;color:#9ca3af}.dark-mode .unified-remove-button:hover{background:#374151;color:#e1e1e6}.desktop-only{display:none}.mobile-only{display:flex}.drag-instruction{font-size:.9rem;color:#666;margin:.5rem 0 1rem;font-style:italic}.dark-mode .drag-instruction{color:#9ca3af}.error-message{background:#fff;color:#000;padding:1.5rem;border:2px solid #000000;margin:1.5rem 0;font-weight:400}.validation-results{background:#fff;color:#000;padding:1.5rem;border:2px solid #000000;margin:1.5rem 0}.dark-mode .error-message{background:#1a0a0a;color:#ef4444;border:2px solid #ef4444}.dark-mode .validation-results{background:#0a0a0a;color:#e1e1e6;border:2px solid #262626}.validation-results h3{margin:0 0 1rem;font-size:1.1rem;color:#000}.validation-results p{margin:.5rem 0;font-size:1.15rem;color:#333}.dark-mode .validation-results h3{color:#e1e1e6}.dark-mode .validation-results p{color:#9ca3af}.action-section{text-align:center;margin:2rem 0}.merge-button{background:var(--accent-primary);color:#fff;border:2px solid var(--accent-primary);padding:1rem 2.5rem;font-size:1rem;font-weight:600;cursor:pointer;transition:var(--transition-all);min-width:200px;border-radius:var(--border-radius-lg);text-transform:none;letter-spacing:0;box-shadow:var(--shadow-md);position:relative;overflow:hidden}.merge-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:var(--transition-transform)}.merge-button:hover:not(:disabled):before{left:100%}.merge-button:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.merge-button:disabled{background:var(--gray-400);color:var(--text-tertiary);border-color:var(--gray-400);cursor:not-allowed;transform:none;box-shadow:var(--shadow-sm)}.dark-mode .merge-button{background:#a855f7;color:#fff;border:2px solid #a855f7}.dark-mode .merge-button:hover:not(:disabled){background:#9333ea;color:#fff}.dark-mode .merge-button:disabled{background:#374151;color:#6b7280;border-color:#374151}.payment-button{background:#fff;color:#000;border:2px solid #000000;padding:.75rem 1.5rem;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s ease;border-radius:0;display:inline-flex;align-items:center;gap:.5rem;text-decoration:none;margin-left:1rem}.payment-button:hover{background:#000;color:#fff}.payment-icon{font-size:1rem}.payment-text{font-weight:500}.payment-section{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:1rem}@media (max-width: 768px){.payment-button{margin-left:0;margin-top:1rem;width:100%;justify-content:center}.payment-section{flex-direction:column;align-items:stretch}.file-table-wrapper{overflow-x:auto;-webkit-overflow-scrolling:touch}}.instructions{background:#fafafa;border:1px solid #000000;padding:2rem;margin-top:2rem}.dark-mode .payment-button{background:#0a0a0a;color:#e1e1e6;border:2px solid #262626}.dark-mode .payment-button:hover{background:#1a1a1a;color:#a855f7;border-color:#a855f7}.nav-payment-button{margin-left:1rem!important;margin-right:0!important;border-radius:0;border:2px solid #000000!important}.dark-mode .nav-payment-button{border:2px solid #262626;background:#0a0a0a;color:#e1e1e6}.dark-mode .nav-payment-button:hover{background:#1a1a1a;color:#a855f7;border-color:#a855f7}.dark-mode .instructions{background:#1a1a1a;border:1px solid #262626}.instructions h3{margin:0 0 1rem;color:#000;font-size:1.2rem}.instructions ol{margin:0;padding-left:1.5rem}.instructions li{margin:.5rem 0;color:#333;line-height:1.5}.dark-mode .instructions h3{color:#e1e1e6}.dark-mode .instructions li{color:#9ca3af}.pwa-install-banner{position:fixed;bottom:2rem;left:2rem;right:2rem;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-xl);padding:1.5rem;z-index:1000;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(100px);opacity:0}to{transform:translateY(0);opacity:1}}.pwa-install-content{display:flex;align-items:center;justify-content:space-between;gap:1rem}.pwa-install-text{display:flex;align-items:center;gap:1rem;flex:1}.pwa-install-icon{font-size:2rem;flex-shrink:0}.pwa-install-text h4{margin:0 0 .25rem;color:var(--text-primary);font-size:1.1rem;font-weight:600}.pwa-install-text p{margin:0;color:var(--text-secondary);font-size:.9rem}.pwa-install-actions{display:flex;align-items:center;gap:.75rem;flex-shrink:0}.pwa-install-button{background:var(--accent-primary);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:var(--border-radius-md);font-weight:600;cursor:pointer;transition:var(--transition-all);white-space:nowrap}.pwa-install-button:hover{background:var(--accent-hover);transform:translateY(-1px)}.pwa-dismiss-button{background:none;border:1px solid var(--border-primary);color:var(--text-secondary);padding:.5rem;border-radius:var(--border-radius-sm);cursor:pointer;transition:var(--transition-colors);display:flex;align-items:center;justify-content:center;width:32px;height:32px}.pwa-dismiss-button:hover{background:var(--bg-tertiary);color:var(--text-primary)}@media (max-width: 768px){.pwa-install-banner{left:1rem;right:1rem;bottom:1rem;padding:1.25rem}.pwa-install-content{flex-direction:column;align-items:flex-start;gap:1rem}.pwa-install-actions{width:100%;justify-content:space-between}.pwa-install-button{flex:1;padding:1rem}}.app-footer{background:var(--bg-primary);border-top:1px solid var(--border-primary);padding:2rem;margin-top:auto}.footer-content{max-width:1440px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;color:var(--text-secondary);font-size:.9rem;transition:var(--transition-colors)}.footer-content a{color:var(--accent-primary);text-decoration:none;font-weight:500;transition:var(--transition-colors)}.footer-content a:hover{color:var(--accent-hover);text-decoration:underline}.footer-links{display:flex;gap:1rem}.footer-link{background:none;border:none;color:var(--text-secondary);font-size:.9rem;cursor:pointer;text-decoration:none;transition:var(--transition-colors);padding:.25rem 0}.footer-link:hover{color:var(--accent-primary);text-decoration:underline}.terms-container{max-width:800px;margin:0 auto}.terms-header{text-align:center;margin-bottom:2rem;padding-bottom:2rem;border-bottom:2px solid #000000}.terms-header h1{font-size:2.5rem;font-weight:700;color:#000;margin-bottom:.5rem}.last-updated{color:#666;font-style:italic}.dark-mode .terms-header{border-bottom:2px solid #262626}.dark-mode .terms-header h1{color:#e1e1e6}.dark-mode .last-updated{color:#9ca3af}.terms-content{line-height:1.7}.terms-section{margin-bottom:2rem}.terms-section h2{color:#000;font-size:1.3rem;font-weight:600;margin-bottom:1rem;border-bottom:1px solid #000000;padding-bottom:.5rem}.terms-section h3{color:#000;font-size:1.1rem;font-weight:600;margin-bottom:.5rem}.terms-section p{margin-bottom:1rem;color:#333}.terms-section ul{margin:1rem 0;padding-left:2rem}.terms-section li{margin-bottom:.5rem;color:#333}.dark-mode .terms-section h2{color:#e1e1e6;border-bottom:1px solid #262626}.dark-mode .terms-section h3{color:#e1e1e6}.dark-mode .terms-section p,.dark-mode .terms-section li{color:#9ca3af}.liability-warning{background:#000;color:#fff;padding:2rem;border:2px solid #000000;margin:2rem 0}.liability-warning h3{color:#fff;font-size:1.2rem;margin-bottom:1rem}.liability-warning p,.liability-warning li{color:#fff}.dark-mode .liability-warning{background:#a855f7;color:#fff;border:2px solid #a855f7}.dark-mode .liability-warning h3,.dark-mode .liability-warning p,.dark-mode .liability-warning li{color:#fff}.terms-footer{margin-top:3rem;padding-top:2rem;border-top:2px solid #000000}.acknowledgment-box{background:#f8f8f8;padding:2rem;border:2px solid #000000;text-align:center}.acknowledgment-box h3{color:#000;margin-bottom:1rem}.acknowledgment-box p{color:#333;font-size:1rem;margin:0}.dark-mode .terms-footer{border-top:2px solid #262626}.dark-mode .acknowledgment-box{background:#1a1a1a;border:2px solid #262626}.dark-mode .acknowledgment-box h3{color:#e1e1e6}.dark-mode .acknowledgment-box p{color:#9ca3af}.dark-mode .tool-tab{border:2px solid #262626;background:#0a0a0a;color:#e1e1e6}.dark-mode .tool-tab:hover{background:#1a1a1a;color:#a855f7;border-color:#a855f7}.dark-mode .tool-tab.active{background:#a855f7;color:#000;border-color:#a855f7}.dark-mode .compression-settings{background:#1a1a1a;border:1px solid #262626}.dark-mode .compression-settings h3{color:#e1e1e6}.dark-mode .compression-option{border:1px solid #262626;background:#0a0a0a}.dark-mode .compression-option:hover{border-color:#a855f7;background:#1a1a1a}.compression-option.selected{background:#f0f8ff;border-color:#4285f4}.dark-mode .compression-option.selected{background:#1a1a2e;border-color:#a855f7}.dark-mode .compression-label{color:#e1e1e6}.dark-mode .compression-description{color:#9ca3af}.dark-mode .result-item{border:1px solid #262626;background:#0a0a0a}.dark-mode .result-filename{color:#e1e1e6}.dark-mode .size-comparison{color:#9ca3af}.dark-mode .compression-savings{color:#10b981}.dark-mode .bulk-download{border-top:1px solid #262626}.hamburger-menu{display:none;flex-direction:column;justify-content:space-around;width:32px;height:32px;background:transparent;border:none;cursor:pointer;padding:0;z-index:101}.hamburger-line{width:100%;height:3px;background-color:#000;border-radius:2px;transition:all .3s ease;transform-origin:1px}.dark-mode .hamburger-line{background-color:#e1e1e6}.hamburger-menu[aria-expanded=true] .hamburger-line:nth-child(1){transform:rotate(45deg)}.hamburger-menu[aria-expanded=true] .hamburger-line:nth-child(2){opacity:0}.hamburger-menu[aria-expanded=true] .hamburger-line:nth-child(3){transform:rotate(-45deg)}@media (max-width: 1024px){.menu-container{margin:0 1rem;padding:.75rem 1rem;gap:1rem;flex-wrap:wrap;justify-content:space-between}.logo-section{order:1;flex:1;min-width:200px}.brand-name{font-size:1.3rem}.menu-tabs{order:2;flex-wrap:wrap;gap:.5rem}.menu-tab,.dark-mode-toggle{padding:.5rem .8rem;font-size:.9rem;white-space:nowrap}.nav-payment-button{order:3;margin-left:.5rem!important;padding:.5rem .8rem;font-size:.9rem;white-space:nowrap}.app-main{width:98%;padding:2rem}.file-name{max-width:250px}}@media (max-width: 912px) and (min-width: 769px){.menu-container{margin:0 .5rem;padding:.5rem .8rem;gap:.8rem;justify-content:space-between;align-items:center}.logo-section{flex:0 0 auto;gap:.5rem}.app-logo{height:45px;width:45px}.brand-name{font-size:1.1rem}.brand-tagline{font-size:.8rem}.menu-tabs{flex:1;justify-content:center;gap:.3rem;flex-wrap:wrap;max-width:400px}.menu-tab,.dark-mode-toggle{padding:.4rem .6rem;font-size:.8rem;margin-left:-1px}.nav-payment-button{flex:0 0 auto;margin-left:.5rem!important;padding:.4rem .6rem;font-size:.8rem}.tab-text,.toggle-text,.payment-text{display:none}.tab-icon,.toggle-icon,.payment-icon{font-size:1.2rem}}@media (max-width: 768px){.menu-container{margin:0 .5rem;flex-direction:row;justify-content:space-between;align-items:center;gap:1rem;padding:1rem;background:#fff;border-radius:8px;position:relative}.dark-mode .menu-container{background:#0a0a0a}.logo-section{order:1;justify-content:flex-start;gap:.75rem;flex:1;min-width:0}.hamburger-menu{display:flex;order:3;flex-shrink:0;margin-left:auto}.menu-tabs{display:none;position:absolute;top:100%;left:0;right:0;width:100%;background:#fff;border:2px solid #000000;border-top:none;flex-direction:column;gap:0;padding:1rem;z-index:100;border-radius:0 0 8px 8px;box-shadow:0 4px 20px #0000001a}.dark-mode .menu-tabs{background:#0a0a0a;border-color:#262626}.menu-tabs.menu-open{display:flex}.menu-tabs .menu-tab,.menu-tabs .dark-mode-toggle,.menu-tabs .nav-payment-button{width:100%;justify-content:flex-start;align-items:center;padding:1rem;margin:0 0 .75rem;border:1px solid #000000;border-radius:8px;font-size:1rem;text-align:left;gap:1rem;min-height:48px;box-shadow:0 2px 4px #0000000d}.dark-mode .menu-tabs .menu-tab,.dark-mode .menu-tabs .dark-mode-toggle,.dark-mode .menu-tabs .nav-payment-button{border-color:#262626}.menu-tabs.menu-open .tab-text,.menu-tabs.menu-open .toggle-text,.menu-tabs.menu-open .payment-text{display:inline!important;font-weight:500;flex:1}.menu-tabs .tab-text,.menu-tabs .toggle-text,.menu-tabs .payment-text{display:inline!important;font-weight:500;flex:1}.menu-tabs .tab-icon,.menu-tabs .toggle-icon,.menu-tabs .payment-icon{font-size:1.25rem;flex-shrink:0;width:24px;text-align:center;margin-right:.5rem}.app-logo{height:50px;width:50px}.brand-name{font-size:1.3rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.brand-tagline{font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.app-content{padding:1rem}.app-main{width:100%;padding:1.5rem;border-left:none;border-right:none;border-radius:8px}.merge-button{width:100%;min-width:auto;padding:1.2rem 2rem}.upload-label{width:100%;text-align:center;padding:1.2rem 2rem}.file-table-wrapper{max-height:400px;overflow-y:auto;-webkit-overflow-scrolling:touch}.file-table{display:none}.mobile-file-list{display:block}.mobile-file-item{background:#fff;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:.75rem;padding:1rem;position:relative;cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none;transition:all .2s ease}.mobile-file-item:active{cursor:grabbing;background:#f8f8f8;transform:scale(1.02);box-shadow:0 4px 12px #00000026}.mobile-file-item.dragging{opacity:.8;transform:rotate(3deg) scale(1.05);box-shadow:0 8px 25px #00000040;z-index:1000}.dark-mode .mobile-file-item{background:#1a1a1a;border-color:#374151}.dark-mode .mobile-file-item:active{background:#262626;box-shadow:0 4px 12px #ffffff1a}.dark-mode .mobile-file-item.dragging{box-shadow:0 8px 25px #ffffff26}.mobile-file-row-1{display:flex;align-items:center;margin-bottom:.5rem}.mobile-file-icon{margin-right:.5rem;font-size:1rem}.mobile-file-name{flex:1;font-size:.9rem;font-weight:500;color:#000;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:.5rem}.dark-mode .mobile-file-name{color:#e1e1e6}.mobile-status{font-size:1rem;flex-shrink:0}.mobile-file-row-2{display:flex;align-items:center;justify-content:space-between}.mobile-file-size{font-size:.8rem;color:#666;font-family:Courier New,monospace}.dark-mode .mobile-file-size{color:#9ca3af}.mobile-remove-button{background:none;border:1px solid #e0e0e0;cursor:pointer;padding:.3rem .6rem;border-radius:4px;font-size:.8rem;color:#666;transition:all .2s ease}.mobile-remove-button:hover{background:#f5f5f5;color:#000}.dark-mode .mobile-remove-button{border-color:#374151;color:#9ca3af}.dark-mode .mobile-remove-button:hover{background:#374151;color:#e1e1e6}.remove-button{font-size:.85rem;padding:.25rem}}.pdf-tool-tabs{justify-content:space-around;flex-wrap:wrap;gap:.5rem}.tool-tab{flex:1;min-width:120px;max-width:200px;justify-content:center;text-align:center;padding:.8rem 1rem;font-size:.9rem;margin-left:0;border-radius:4px}} @media (min-width: 769px){.file-table-wrapper{border:1px solid #000000;overflow:auto;max-height:600px}.dark-mode .file-table-wrapper{border:1px solid #262626}.file-table{display:table;width:100%;border-collapse:collapse;background:#fff;font-size:1rem}.dark-mode .file-table{background:#0a0a0a}.mobile-file-list{display:none}.footer-content{flex-direction:column;gap:1rem;text-align:center;font-size:.85rem}.terms-header h1{font-size:2rem}.terms-container{padding:1rem}.instructions{padding:1.5rem}.pdf-tool-tabs{flex-direction:column;width:100%;gap:.75rem}.tool-tab{justify-content:flex-start;margin-left:0;padding:1rem 1.2rem;border-radius:8px;flex-direction:row;gap:1rem;align-items:center;width:100%;box-sizing:border-box}.tool-text{display:block;font-size:.9rem;font-weight:500}.compression-levels{gap:.5rem}.compression-option{padding:.75rem}.result-item{flex-direction:column;gap:1rem;align-items:stretch}}@media (max-width: 480px){.menu-container{margin:0;padding:.8rem;gap:.5rem}.logo-section{gap:.5rem;flex:1;min-width:0}.brand-name{font-size:1.1rem;line-height:1.2}.brand-tagline{font-size:.75rem;line-height:1.2}.app-logo{height:40px;width:40px}.menu-tabs{gap:.3rem}.menu-tab,.dark-mode-toggle,.nav-payment-button{padding:.6rem .4rem;min-width:50px;flex:1;max-width:60px;display:flex;align-items:center;justify-content:center}.tab-icon,.toggle-icon,.payment-icon{font-size:1.3rem}.app-logo{height:45px;width:45px}.app-content{padding:.8rem}.app-main{padding:1rem;margin:.5rem 0}.merge-button,.upload-label{padding:1rem 1.5rem;font-size:1rem}.file-table th,.file-table td{padding:.4rem .2rem}.file-name{max-width:120px}.terms-header h1{font-size:1.8rem}.liability-warning,.acknowledgment-box{padding:1.2rem}.footer-content{padding:1rem;font-size:.8rem}}.faq-section-title{display:flex;align-items:center;gap:10px;margin-bottom:20px;border-bottom:2px solid #e0e0e0;padding-bottom:10px;color:#000}.dark-mode .faq-section-title{border-bottom:2px solid #262626;color:#e1e1e6}.faq-item{margin-bottom:20px;padding-left:20px}.faq-question{color:#2c3e50;margin-bottom:10px;font-size:1.1rem;font-weight:600}.dark-mode .faq-question{color:#e1e1e6}.faq-answer{margin-left:0;line-height:1.6;color:#555;margin-bottom:0}.dark-mode .faq-answer{color:#9ca3af}.contact-form-container{max-width:800px;margin:0 auto;padding:2rem}.contact-form-header{text-align:center;margin-bottom:2.5rem}.contact-form-header h2{font-size:2rem;font-weight:600;color:#000;margin:0 0 1rem}.contact-form-header p{font-size:1.1rem;color:#666;margin:0}.contact-form{background:#fff;border:2px solid #000000;padding:2.5rem;margin-bottom:2rem}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:600;color:#000;margin-bottom:.5rem;font-size:1rem}.form-input,.form-textarea{width:100%;padding:1rem;border:2px solid #000000;background:#fff;color:#000;font-size:1rem;font-family:inherit;transition:all .2s ease;box-sizing:border-box}.form-input:focus,.form-textarea:focus{outline:none;border-color:#000;background:#fafafa}.form-textarea{resize:vertical;min-height:120px}.form-submit-button{background:#000;color:#fff;border:2px solid #000000;padding:1rem 2.5rem;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;min-width:200px;text-transform:uppercase;letter-spacing:1px}.form-submit-button:hover:not(:disabled){background:#fff;color:#000}.form-submit-button:disabled{background:#ccc;color:#666;border-color:#ccc;cursor:not-allowed}.form-message{margin-top:1.5rem;padding:1rem;border:2px solid;font-weight:500}.form-message.success{background:#f0f9f0;border-color:#22c55e;color:#166534}.form-message.error{background:#fef2f2;border-color:#ef4444;color:#dc2626}.contact-form-info{text-align:center}.privacy-note{font-size:.9rem;color:#666;font-style:italic;margin:0}.dark-mode .contact-form-header h2{color:#e1e1e6}.dark-mode .contact-form-header p{color:#9ca3af}.dark-mode .contact-form{background:#0a0a0a;border:2px solid #262626}.dark-mode .form-label{color:#e1e1e6}.dark-mode .form-input,.dark-mode .form-textarea{background:#0a0a0a;color:#e1e1e6;border-color:#262626}.dark-mode .form-input:focus,.dark-mode .form-textarea:focus{border-color:#a855f7;background:#1a1a1a}.dark-mode .form-submit-button{background:#a855f7;color:#fff;border:2px solid #a855f7}.dark-mode .form-submit-button:hover:not(:disabled){background:#9333ea;color:#fff}.dark-mode .form-submit-button:disabled{background:#374151;color:#6b7280;border-color:#374151}.dark-mode .form-message.success{background:#064e3b;border-color:#059669;color:#34d399}.dark-mode .form-message.error{background:#7f1d1d;border-color:#dc2626;color:#f87171}.dark-mode .privacy-note{color:#9ca3af}@media (min-width: 769px){.file-list-wrapper{max-height:600px;border-radius:0}.desktop-file-headers{display:flex;background:#f8f8f8;position:sticky;top:0;z-index:10;border-bottom:2px solid #000000}.dark-mode .desktop-file-headers{background:#262626;border-bottom-color:#555}.unified-header-name,.unified-header-size,.unified-header-status,.unified-header-action{padding:1rem .75rem;text-align:left;font-weight:600;color:#000;background:#fff}.dark-mode .unified-header-name,.dark-mode .unified-header-size,.dark-mode .unified-header-status,.dark-mode .unified-header-action{color:#e1e1e6;background:#0a0a0a}.unified-header-name{flex:1}.unified-header-size,.unified-header-status{width:120px}.unified-header-action{width:100px;text-align:center}.unified-file-item{margin-bottom:0;border-radius:0;border:none;border-bottom:1px solid #e0e0e0;padding:.75rem}.unified-file-row-1{margin:0}.unified-file-row-2{display:none}.desktop-only{display:block}.mobile-only{display:none}.unified-file-size.desktop-only,.unified-file-status.desktop-only{width:120px;text-align:left}.unified-remove-button.desktop-only{width:100px;margin-left:auto;padding:.25rem .5rem;font-size:1rem;border:1px solid #000000;border-radius:0;color:#000}.unified-remove-button.desktop-only:hover{background:#000;color:#fff}.dark-mode .unified-remove-button.desktop-only{border-color:#555;color:#e1e1e6}.dark-mode .unified-remove-button.desktop-only:hover{background:#555;color:#fff}}
