:root{--bg-primary: #f8f7f4;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-card-elevated: #ffffff;--bg-hover: #f0eeeb;--bg-surface: #f3f2ef;--accent: #2563eb;--accent-light: #3b82f6;--accent-dim: rgba(37, 99, 235, .06);--accent-border: rgba(37, 99, 235, .18);--text-primary: #1a1a1a;--text-secondary: #525252;--text-muted: #9ca3af;--border: #e5e4e1;--border-subtle: #eeedea;--change-text: #2563eb;--change-image: #d97706;--change-both: #7c3aed;--success: #16a34a;--danger: #dc2626;--radius: 10px;--radius-sm: 6px;--shadow-card: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.03);--shadow-elevated: 0 4px 12px rgba(0,0,0,.06), 0 1px 4px rgba(0,0,0,.04);--font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Cascadia Code", monospace}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);height:100vh;overflow:hidden;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:52px;background:var(--bg-secondary);border-bottom:1px solid var(--border);flex-shrink:0}.header-left{display:flex;align-items:center;gap:10px}.header-logo{color:var(--accent);flex-shrink:0}.app-header h1{font-size:15px;font-weight:600;letter-spacing:-.01em;color:var(--text-primary)}.header-subtitle{font-size:12px;color:var(--text-muted);font-weight:400;padding-left:10px;border-left:1px solid var(--border)}.header-actions button{background:transparent;border:1px solid var(--border);color:var(--text-secondary);width:32px;height:32px;border-radius:var(--radius-sm);cursor:pointer;font-size:15px;transition:all .15s ease;display:flex;align-items:center;justify-content:center}.header-actions button:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--text-muted)}.app-layout{display:flex;flex:1;overflow:hidden}.sidebar{width:280px;min-width:280px;background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:16px}.sidebar-search-row{display:flex;gap:8px}.sidebar-search-row input{flex:1;min-width:0}.sidebar-header input{width:100%;padding:8px 12px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:13px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.sidebar-header input::placeholder{color:var(--text-muted)}.sidebar-header input:focus{border-color:var(--accent);background:var(--bg-card);box-shadow:0 0 0 3px var(--accent-dim)}.btn-icon{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);width:34px;height:34px;border-radius:var(--radius-sm);cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center;transition:all .15s ease;flex-shrink:0}.btn-icon:hover{background:var(--accent);color:#fff;border-color:var(--accent)}.add-asin-form{margin-top:10px;display:flex;flex-direction:column;gap:8px;animation:fadeIn .15s ease}.add-asin-form.hidden{display:none}.add-asin-form input{width:100%}.add-asin-actions{display:flex;gap:6px}.btn-primary,.btn-secondary{flex:1;padding:7px 12px;border-radius:var(--radius-sm);font-size:12px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:all .12s ease}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{filter:brightness(1.08)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg-surface);color:var(--text-secondary);border-color:var(--border)}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary)}.asin-list{flex:1;overflow-y:auto;padding:0 8px 8px}.sidebar-divider{height:1px;background:var(--border);margin:4px 12px 6px}.asin-item{padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer;margin-bottom:2px;transition:all .12s ease;border:1px solid transparent;position:relative}.asin-item:hover{background:var(--bg-hover);border-color:var(--border)}.asin-item.active{background:var(--accent-dim);border-color:var(--accent-border)}.all-asins-item .asin-item-content{gap:10px}.all-asins-icon{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--bg-surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--text-muted);flex-shrink:0}.all-asins-item.active .all-asins-icon{background:var(--accent-dim);border-color:var(--accent-border);color:var(--accent)}.asin-item-content{display:flex;align-items:center;gap:10px}.asin-item-text{min-width:0;flex:1}.asin-thumb{width:36px;height:36px;border-radius:var(--radius-sm);object-fit:cover;border:1px solid var(--border);flex-shrink:0;background:var(--bg-surface)}.asin-thumb.error,.asin-thumb-empty{width:36px;height:36px;border-radius:var(--radius-sm);border:1px solid var(--border);flex-shrink:0;background:var(--bg-surface)}.asin-thumb.error{display:block}.asin-code{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.02em;display:flex;align-items:center}.asin-label{font-size:11px;color:var(--text-muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.asin-item.active .asin-code{color:var(--accent);font-weight:600}.asin-item.active .asin-label{color:var(--text-secondary)}.asin-status{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:6px;vertical-align:1px;flex-shrink:0}.asin-status.active{background:#16a34a}.asin-status.paused,.asin-status.archived{background:var(--text-muted)}.asin-item-actions{position:absolute;right:8px;top:50%;transform:translateY(-50%);opacity:0;transition:opacity .12s ease}.asin-item:hover .asin-item-actions{opacity:1}.asin-action-btn{background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);width:24px;height:24px;border-radius:4px;cursor:pointer;font-size:11px;display:flex;align-items:center;justify-content:center;transition:all .12s ease}.asin-action-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--text-muted)}.asin-action-btn.restore:hover{color:#16a34a;border-color:#16a34a}.asin-section-label{padding:10px 16px 6px;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;gap:6px;-webkit-user-select:none;user-select:none}.asin-section-label:hover{color:var(--text-secondary)}.asin-section-label .section-arrow{font-size:8px;transition:transform .15s ease}.asin-section-label.open .section-arrow{transform:rotate(90deg)}.archived-list{display:none}.archived-list.open{display:block}.asin-item.archived-item{opacity:.6}.asin-item.archived-item:hover{opacity:1}.main-content{flex:1;overflow-y:auto;padding:28px 32px;background:var(--bg-primary)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);gap:8px;font-size:13px}.empty-icon{font-size:36px;opacity:.5}.loading{display:flex;align-items:center;justify-content:center;height:200px;color:var(--text-muted);font-size:13px}.error-msg{background:#dc26260d;border:1px solid rgba(220,38,38,.15);border-radius:var(--radius-sm);padding:12px 16px;color:var(--danger);font-size:13px;margin-bottom:20px}.asin-header{margin-bottom:28px}.asin-header h2{font-family:var(--font-mono);font-size:18px;font-weight:600;letter-spacing:-.01em;margin-bottom:4px}.asin-header p{color:var(--text-secondary);font-size:13px;line-height:1.4}.section-title{font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.timeline-section{margin-bottom:28px}.timeline{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px 18px;box-shadow:var(--shadow-card)}.timeline-track{position:relative;height:36px;margin:0 8px}.timeline-line{position:absolute;top:50%;left:0;right:0;height:2px;background:var(--border);transform:translateY(-50%);border-radius:1px}.timeline-marker{position:absolute;top:50%;transform:translate(-50%,-50%);cursor:pointer;z-index:2}.timeline-dot{width:12px;height:12px;border-radius:50%;border:2px solid var(--bg-card);transition:all .15s ease}.timeline-dot:hover{transform:scale(1.6);box-shadow:0 0 0 3px var(--accent-dim)}.timeline-dot.text{background:var(--change-text)}.timeline-dot.image{background:var(--change-image)}.timeline-dot.both{background:var(--change-both)}.timeline-dot.selected{transform:scale(1.6);box-shadow:0 0 0 4px var(--accent-dim)}.timeline-track-stacked{height:60px}.timeline-track-stacked .timeline-line{top:auto;bottom:0;transform:none}.timeline-marker-stacked{position:absolute;bottom:-1px;transform:translate(-50%);cursor:pointer;z-index:2}.timeline-dot-stack{display:flex;flex-direction:column-reverse;align-items:center;gap:3px}.timeline-dot-stacked{width:10px;height:10px;border-radius:50%;border:2px solid var(--bg-card);transition:all .15s ease;flex-shrink:0}.timeline-marker-stacked:hover .timeline-dot-stacked{transform:scale(1.4)}.timeline-dot-stacked.selected{transform:scale(1.4);box-shadow:0 0 0 3px var(--accent-dim)}.timeline-tooltip{position:absolute;bottom:calc(100% + 10px);left:50%;transform:translate(-50%);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:5px 10px;font-size:11px;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .12s ease;z-index:10;box-shadow:var(--shadow-elevated);color:var(--text-secondary)}.timeline-marker:hover .timeline-tooltip,.timeline-marker-stacked:hover .timeline-tooltip{opacity:1}.timeline-dates{display:flex;justify-content:space-between;margin:10px 8px 0;font-size:10px;color:var(--text-muted);font-family:var(--font-mono);letter-spacing:.02em}.timeline-legend{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;padding-top:14px;border-top:1px solid var(--border-subtle);font-size:11px;color:var(--text-muted)}.legend-item{display:flex;align-items:center;gap:6px}.legend-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}.timeline-empty{text-align:center;color:var(--text-muted);font-size:12px;padding:24px}.change-detail-card{background:var(--bg-card);border:1px solid var(--accent-border);border-radius:var(--radius);padding:20px 24px;margin-bottom:28px;animation:fadeIn .2s ease;box-shadow:0 0 0 1px var(--accent-dim),var(--shadow-card)}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.change-detail-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.change-detail-date{font-size:14px;font-weight:600}.btn-close{background:var(--bg-surface);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;font-size:14px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);transition:all .12s ease;line-height:1}.btn-close:hover{color:var(--text-primary);border-color:var(--text-muted)}.asin-change-group{margin-bottom:16px}.asin-change-group:last-child{margin-bottom:0}.asin-change-group-header{display:flex;align-items:center;gap:8px;padding:8px 0;margin-bottom:8px;border-bottom:1px solid var(--border-subtle)}.asin-color-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.asin-color-dot-sm{width:6px;height:6px;border-radius:50%;flex-shrink:0;display:inline-block;vertical-align:1px}.asin-change-group-code{font-family:var(--font-mono);font-size:12px;font-weight:600;color:var(--text-primary)}.asin-change-group-label{font-size:12px;color:var(--text-muted)}.changes-list{display:flex;flex-direction:column;gap:12px}.change-badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:4px;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;flex-shrink:0}.change-badge.text{background:#2563eb14;color:var(--change-text)}.change-badge.image{background:#d9770614;color:var(--change-image)}.change-comparison{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:10px}.change-side{background:var(--bg-surface);border-radius:var(--radius-sm);padding:12px 14px;border:1px solid var(--border)}.change-side-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}.change-side-label.old{color:var(--danger)}.change-side-label.new{color:var(--success)}.change-side-value{font-size:12px;line-height:1.6;word-break:break-word;color:var(--text-secondary)}.change-images-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:10px}.change-image-col img{max-width:100%;border-radius:var(--radius-sm);border:1px solid var(--border);margin-bottom:4px}.all-changes-section{margin-bottom:28px}.change-date-group{margin-bottom:6px}.change-date-header{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .12s ease;font-size:13px;font-weight:500}.change-date-header:hover{background:var(--bg-hover);border-color:var(--text-muted)}.change-date-header .count{font-size:11px;color:var(--text-muted);font-weight:400}.change-date-header .arrow{margin-left:auto;transition:transform .15s ease;color:var(--text-muted);font-size:10px}.change-date-header.open .arrow{transform:rotate(90deg)}.change-date-body{display:none;padding:6px 0 0 14px}.change-date-body.open{display:block}.change-row{display:flex;align-items:flex-start;gap:10px;padding:8px 12px;border-left:2px solid var(--border);margin-bottom:2px;font-size:12px;flex-wrap:wrap}.change-row-asin{display:inline-flex;align-items:center;gap:4px;font-family:var(--font-mono);font-size:11px;font-weight:500;color:var(--text-secondary);background:var(--bg-surface);padding:1px 6px;border-radius:3px;flex-shrink:0}.change-row-field{font-weight:600;min-width:90px;color:var(--text-secondary)}.change-row-values{color:var(--text-muted);flex:1}.change-row-old{text-decoration:line-through;color:var(--danger);opacity:.7}.change-row-new{color:var(--success)}.change-row-images{flex-direction:column;gap:8px}.change-row-image-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:8px;width:100%}.change-row-image-side{display:flex;flex-direction:column;gap:8px}.change-row-image-side img{max-width:100px;border-radius:4px;border:1px solid var(--border);cursor:pointer;transition:border-color .12s ease}.change-row-image-side img:hover{border-color:var(--accent)}.listing-section{margin-bottom:28px}.listing-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-card)}.listing-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}.listing-field{display:flex;flex-direction:column;gap:4px}.listing-field-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.listing-field-value{font-size:13px;line-height:1.4;color:var(--text-primary)}.listing-bullets ul{list-style:none;padding:0}.listing-bullets li{padding:8px 0 8px 14px;position:relative;font-size:12px;line-height:1.6;border-bottom:1px solid var(--border-subtle);color:var(--text-secondary)}.listing-bullets li:last-child{border-bottom:none}.listing-bullets li:before{content:"";position:absolute;left:0;top:14px;width:4px;height:4px;border-radius:50%;background:var(--accent)}.listing-images-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}.listing-image-thumb{aspect-ratio:1;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border);background:var(--bg-surface);cursor:pointer;transition:border-color .12s ease}.listing-image-thumb:hover{border-color:var(--accent)}.listing-image-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease}.listing-image-thumb:hover img{transform:scale(1.05)}.lightbox{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:100;cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.lightbox img{max-width:90vw;max-height:90vh;border-radius:var(--radius);box-shadow:var(--shadow-elevated)}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}