:root{--bg-primary: #0a0a0b;--bg-secondary: #141416;--bg-tertiary: #1c1c1f;--bg-elevated: #222225;--text-primary: #f5f5f7;--text-secondary: #a1a1a6;--text-muted: #6e6e73;--accent: #6366f1;--accent-light: rgba(99, 102, 241, .1);--accent-hover: #818cf8;--accent-glow: rgba(99, 102, 241, .25);--success: #22c55e;--success-light: rgba(34, 197, 94, .1);--error: #ef4444;--error-light: rgba(239, 68, 68, .1);--warning: #f59e0b;--warning-light: rgba(245, 158, 11, .1);--border: rgba(255, 255, 255, .08);--border-light: rgba(255, 255, 255, .05);--shadow-sm: 0 1px 2px rgba(0,0,0,.3);--shadow-md: 0 4px 20px rgba(0,0,0,.4);--shadow-lg: 0 12px 40px rgba(0,0,0,.5);--shadow-glow: 0 0 40px var(--accent-glow);--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px;--radius-xl: 28px;--transition: all .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: all .3s cubic-bezier(.4, 0, .2, 1);--gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);--gradient-card: linear-gradient(180deg, 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.toolbar-label{flex:1}.album-photos-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:var(--space-md);max-height:300px;overflow-y:auto;padding:var(--space-md);background:var(--bg-tertiary);border-radius:var(--radius-md)}.album-photo-item{position:relative;aspect-ratio:1;border-radius:var(--radius-sm);overflow:hidden;cursor:move;transition:var(--transition);box-shadow:var(--shadow-sm)}.album-photo-item:hover{transform:scale(1.02);box-shadow:var(--shadow-md)}.album-photo-item img{width:100%;height:100%;object-fit:cover}.album-photo-item .photo-remove{position:absolute;top:4px;right:4px;width:24px;height:24px;background:#0009;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition)}.album-photo-item:hover .photo-remove{opacity:1}.album-photo-item .photo-remove:hover{background:var(--error)}.album-photo-item .photo-remove svg{width:14px;height:14px}.album-photo-number{position:absolute;bottom:4px;left:4px;background:#0009;color:#fff;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600}.album-settings{padding:0 var(--space-lg) var(--space-lg)}.album-actions{padding:var(--space-lg)}.layout-options{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-md)}.layout-option{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm);cursor:pointer}.layout-option input{display:none}.layout-preview{width:60px;height:70px;background:var(--bg-tertiary);border:2px solid var(--border);border-radius:var(--radius-sm);display:grid;gap:3px;padding:5px;transition:var(--transition)}.layout-option input:checked+.layout-preview{border-color:var(--accent);background:var(--accent-light)}.layout-preview span{background:var(--border);border-radius:2px}.layout-preview.grid-2x2{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}.layout-preview.full-page{grid-template-columns:1fr;grid-template-rows:1fr}.layout-preview.polaroid{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}.layout-preview.polaroid span{background:#fff;border:1px solid var(--border);border-bottom:4px solid var(--border)}.layout-preview.collage{grid-template-columns:2fr 1fr;grid-template-rows:1fr 1fr}.layout-preview.collage .big{grid-row:1 / -1}.layout-label{font-size:12px;color:var(--text-secondary);font-weight:500}.layout-option input:checked~.layout-label{color:var(--accent);font-weight:600}.layout-preview.masonry-preview{display:flex;flex-direction:column;gap:3px;padding:5px}.layout-preview.masonry-preview span{width:100%;height:15px}.layout-preview.masonry-preview span.tall{height:25px}.theme-options{display:flex;gap:var(--space-md)}.theme-option{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm);cursor:pointer}.theme-option input{display:none}.theme-preview{width:60px;height:40px;border-radius:var(--radius-sm);border:2px solid var(--border);transition:var(--transition)}.theme-option input:checked+.theme-preview{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.theme-preview.dark-theme{background:linear-gradient(135deg,#1a1a2e,#16213e)}.theme-preview.light-theme{background:linear-gradient(135deg,#667eea,#764ba2)}.theme-preview.minimal-theme{background:linear-gradient(135deg,#f5f5f5,#e0e0e0)}.theme-label{font-size:12px;color:var(--text-secondary);font-weight:500}.theme-option input:checked~.theme-label{color:var(--accent);font-weight:600}.album-action-buttons{display:flex;gap:var(--space-md)}.album-action-buttons .merge-btn{flex:1}.merge-btn.secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.merge-btn.secondary:hover:not(:disabled){background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.album-format-hint{text-align:center;font-size:12px;color:var(--text-muted);margin-top:var(--space-md)}.footer{text-align:center;margin-top:var(--space-2xl);padding:var(--space-lg);color:var(--text-muted);font-size:13px}.footer a{color:var(--text-secondary);text-decoration:none}.footer a:hover{color:var(--accent)}.footer-links{display:flex;justify-content:center;gap:24px;margin-top:12px;flex-wrap:wrap}.footer-links a{color:var(--text-secondary);text-decoration:none;font-size:13px;transition:color .2s}.footer-links a:hover{color:var(--accent)}.footer-copy{margin-top:12px;font-size:12px;color:var(--text-muted);opacity:.7}.visually-hidden,.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.hidden{display:none!important}.visible{display:block!important}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.features{grid-template-columns:1fr;gap:var(--space-md)}.book-toggles{grid-template-columns:1fr}.format-select-group{flex-direction:column}.format-select-large{width:100%}}@media (max-width: 640px){.app-container{padding:var(--space-lg) var(--space-md) 60px}.header{margin-bottom:var(--space-xl)}.logo-text{font-size:24px}.tagline{font-size:16px}.upload-zone{padding:var(--space-xl) 20px}.upload-title{font-size:18px}.settings-grid{grid-template-columns:1fr}.file-item,.file-list-header{padding:12px var(--space-md)}.merge-section{padding:var(--space-md)}.conversion-grid{grid-template-columns:1fr}.mode-tabs{overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.mode-tabs::-webkit-scrollbar{display:none}.mode-tab{flex:0 0 auto;padding:var(--space-sm) var(--space-md);font-size:13px}.mode-tab svg{width:16px;height:16px}.pdf-editor-toolbar{flex-direction:column;align-items:flex-start}.pdf-pages-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}.layout-options{grid-template-columns:repeat(2,1fr)}.album-photos-grid{grid-template-columns:repeat(auto-fill,minmax(80px,1fr))}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff26}::selection{background:var(--accent-light);color:var(--text-primary)}select option{background:var(--bg-secondary);color:var(--text-primary)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.loaded-files-indicator{position:fixed;top:16px;right:16px;z-index:1000}.lfi-content{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all .2s}.lfi-content:hover{background:var(--bg-tertiary);border-color:var(--accent)}.lfi-content svg{color:var(--accent)}.lfi-text{color:var(--text-primary);font-weight:500}.lfi-expand{display:flex;align-items:center;justify-content:center;width:20px;height:20px;background:transparent;border:none;color:var(--text-muted);cursor:pointer;transition:transform .2s}.lfi-expand:hover{color:var(--text-primary)}.loaded-files-indicator.expanded .lfi-expand{transform:rotate(180deg)}.lfi-dropdown{display:none;position:absolute;top:calc(100% + 8px);right:0;min-width:280px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 32px #0000004d;overflow:hidden}.loaded-files-indicator.expanded .lfi-dropdown{display:block}.lfi-dropdown-header{padding:12px 16px;font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border)}.lfi-dropdown-list{max-height:240px;overflow-y:auto;padding:8px}.lfi-file-item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--bg-tertiary);border-radius:6px;margin-bottom:6px;cursor:pointer;transition:background .15s}.lfi-file-item:hover{background:var(--bg-elevated)}.lfi-file-item:last-child{margin-bottom:0}.lfi-file-icon{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--accent-light);border-radius:6px;color:var(--accent)}.lfi-file-info{flex:1;min-width:0}.lfi-file-name{font-size:13px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lfi-file-meta{font-size:11px;color:var(--text-muted)}.lfi-file-actions{display:flex;gap:4px}.lfi-file-action{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:4px;color:var(--text-muted);cursor:pointer;transition:all .15s}.lfi-file-action:hover{background:var(--bg-secondary);color:var(--text-primary)}.lfi-file-action.edit:hover{color:var(--accent)}.lfi-file-action.sign:hover{color:var(--success)}.lfi-file-action.remove:hover{color:var(--error)}.lfi-dropdown-actions{padding:8px 12px;border-top:1px solid var(--border);display:flex;justify-content:flex-end}.lfi-action-btn{padding:6px 12px;background:transparent;border:1px solid var(--border);border-radius:4px;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all .15s}.lfi-action-btn:hover{background:var(--error-light);border-color:var(--error);color:var(--error)}