:root{--bg-canvas:#f8fafc;--bg-surface:#ffffff;--bg-elevated:#f1f5f9;--bg-subtle:#f8fafc;--bg-input:#ffffff;--bg-backdrop:rgba(15,23,42,0.6);--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#475569;--text-inverse:#ffffff;--border-subtle:#e2e8f0;--border-medium:#cbd5e1;--border-focus:#6366f1;--brand-primary:#4f46e5;--brand-primary-hover:#4338ca;--brand-primary-light:#eef2ff;--brand-primary-glow:rgba(79,70,229,0.15);--accent-merge:#4f46e5;--accent-merge-hover:#4338ca;--accent-merge-subtle:#eef2ff;--accent-merge-border:#c7d2fe;--accent-split:#0f766e;--accent-split-hover:#115e59;--accent-split-subtle:#f0fdfa;--accent-split-border:#99f6e4;--color-success:#10b981;--color-success-bg:#ecfdf5;--color-success-border:#a7f3d0;--color-warning:#f59e0b;--color-warning-bg:#fffbeb;--color-warning-border:#fde68a;--color-danger:#ef4444;--color-danger-bg:#fef2f2;--color-danger-border:#fecaca;--color-info:#3b82f6;--color-info-bg:#eff6ff;--color-info-border:#bfdbfe;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--shadow-xs:0 1px 2px 0 rgba(0,0,0,0.05);--shadow-sm:0 1px 3px 0 rgba(0,0,0,0.08),0 1px 2px -1px rgba(0,0,0,0.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.07),0 2px 4px -2px rgba(0,0,0,0.05);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.07),0 4px 6px -4px rgba(0,0,0,0.05);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.08),0 8px 10px -6px rgba(0,0,0,0.04);--shadow-merge-glow:0 8px 24px rgba(79,70,229,0.18);--shadow-split-glow:0 8px 24px rgba(13,148,136,0.18);--radius-xs:4px;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:20px;--radius-full:9999px;--header-height:70px;--container-max:1200px;--container-narrow:840px;--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-normal:250ms cubic-bezier(0.4,0,0.2,1);--transition-smooth:350ms cubic-bezier(0.16,1,0.3,1)}[data-theme=dark]{--bg-canvas:#0b0f19;--bg-surface:#111827;--bg-elevated:#1e293b;--bg-subtle:#131c2e;--bg-input:#1e293b;--bg-backdrop:rgba(0,0,0,0.75);--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--text-inverse:#0f172a;--border-subtle:#1e293b;--border-medium:#334155;--border-focus:#818cf8;--brand-primary:#6366f1;--brand-primary-hover:#4f46e5;--brand-primary-light:#1e1b4b;--brand-primary-glow:rgba(99,102,241,0.25);--accent-merge:#6366f1;--accent-merge-hover:#818cf8;--accent-merge-subtle:#1e1b4b;--accent-merge-border:#3730a3;--accent-split:#14b8a6;--accent-split-hover:#2dd4bf;--accent-split-subtle:#042f2e;--accent-split-border:#115e59;--color-success:#34d399;--color-success-bg:#064e3b;--color-success-border:#065f46;--color-warning:#fbbf24;--color-warning-bg:#78350f;--color-warning-border:#92400e;--color-danger:#f87171;--color-danger-bg:#7f1d1d;--color-danger-border:#991b1b;--color-info:#60a5fa;--color-info-bg:#1e3a8a;--color-info-border:#1e40af;--shadow-xs:0 1px 2px 0 rgba(0,0,0,0.3);--shadow-sm:0 1px 3px 0 rgba(0,0,0,0.4),0 1px 2px -1px rgba(0,0,0,0.3);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.4),0 2px 4px -2px rgba(0,0,0,0.3);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.5),0 4px 6px -4px rgba(0,0,0,0.3);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.6),0 8px 10px -6px rgba(0,0,0,0.4);--shadow-merge-glow:0 8px 28px rgba(99,102,241,0.3);--shadow-split-glow:0 8px 28px rgba(20,184,166,0.3)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);font-size:16px;line-height:1.6;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{background-color:var(--bg-canvas);color:var(--text-secondary);min-height:100vh;display:flex;flex-direction:column;transition:background-color var(--transition-normal),color var(--transition-normal)}img,svg{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3,h4,h5,h6{color:var(--text-primary);font-weight:700;line-height:1.25;letter-spacing:-.02em}h1{font-size:clamp(2rem,4vw + 1rem,3.25rem);font-weight:800}h2{font-size:clamp(1.5rem,2.5vw + .5rem,2.25rem)}h3{font-size:clamp(1.25rem,1.5vw + .5rem,1.5rem)}p{margin-bottom:1rem}p:last-child{margin-bottom:0}.text-gradient-merge{background:linear-gradient(135deg,#4f46e5,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.text-gradient-split{background:linear-gradient(135deg,#0d9488,#059669);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.container{max-width:var(--container-max)}.container,.container-narrow{width:100%;margin-left:auto;margin-right:auto;padding-left:1.25rem;padding-right:1.25rem}.container-narrow{max-width:var(--container-narrow)}.site-main{flex:1 0 auto;padding-bottom:4rem}.site-header{position:sticky;top:0;z-index:50;background-color:var(--bg-surface);border-bottom:1px solid var(--border-subtle);transition:background-color var(--transition-fast),border-color var(--transition-fast);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.nav-container{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);max-width:var(--container-max);margin:0 auto;padding:0 1.25rem}.brand-link{display:inline-flex;align-items:center;gap:.75rem;font-weight:800;font-size:1.2rem;letter-spacing:-.02em;color:var(--text-primary);-webkit-user-select:none;user-select:none}.brand-icon-box{width:38px;height:38px;border-radius:var(--radius-md);background:linear-gradient(135deg,#4f46e5,#0d9488);color:#ffffff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(79,70,229,.25);flex-shrink:0}.brand-title-prefix{color:var(--text-primary)}.brand-highlight-split{color:var(--accent-split)}.brand-highlight-merge{color:var(--brand-primary)}.desktop-nav{display:none}@media (min-width:900px){.desktop-nav{display:block}}.nav-links{display:flex;align-items:center;gap:.5rem;list-style:none}.nav-link{display:inline-flex;align-items:center;gap:.35rem;padding:.5rem .85rem;font-size:.9375rem;font-weight:500;color:var(--text-secondary);border-radius:var(--radius-md);transition:color var(--transition-fast),background-color var(--transition-fast)}.nav-link:hover{color:var(--text-primary);background-color:var(--bg-elevated)}.nav-link.active{color:var(--brand-primary);font-weight:600;background-color:var(--brand-primary-light)}.nav-right-cluster{display:flex;align-items:center;gap:1.25rem}.nav-controls{gap:.6rem}.nav-controls,.nav-right-group{display:flex;align-items:center}.nav-right-group{gap:.75rem}.nav-divider{width:1px;height:24px;background-color:var(--border-subtle)}.theme-toggle-btn{width:40px;height:40px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background-color:var(--bg-surface);color:var(--text-secondary);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.theme-toggle-btn:hover{background-color:var(--bg-elevated);color:var(--text-primary);border-color:var(--border-medium)}.theme-toggle-btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.mobile-menu-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background-color:var(--bg-surface);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast)}.mobile-menu-btn:hover{background-color:var(--bg-elevated);color:var(--text-primary)}@media (min-width:900px){.mobile-menu-btn{display:none}}.mobile-nav-drawer{position:absolute;top:100%;left:0;right:0;width:100%;height:calc(100vh - var(--header-height));height:calc(100dvh - var(--header-height));background-color:var(--bg-surface);padding:1.5rem 1.25rem 2.5rem;border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle);z-index:100;overflow-y:auto;-webkit-overflow-scrolling:touch;display:flex;flex-direction:column;box-shadow:0 20px 25px -5px rgba(0,0,0,.25),0 8px 10px -6px rgba(0,0,0,.2);animation:slideDown .18s cubic-bezier(.16,1,.3,1)}@media (min-width:900px){.mobile-nav-drawer{display:none!important}}@media (max-width:480px){.nav-container{padding:0 .85rem}.brand-link{gap:.5rem;font-size:1.05rem}.brand-icon-box{width:34px;height:34px}.nav-controls{gap:.4rem}}@media (max-width:340px){.nav-container{padding:0 .5rem}.brand-link{font-size:.95rem;gap:.35rem}.brand-icon-box{width:30px;height:30px}}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.mobile-nav-list{list-style:none;display:flex;flex-direction:column;gap:.5rem}.mobile-nav-link{display:flex;align-items:center;justify-content:space-between;padding:.85rem 1rem;border-radius:var(--radius-md);font-size:1.05rem;font-weight:500;color:var(--text-secondary);transition:background-color var(--transition-fast),color var(--transition-fast)}.mobile-nav-link.active,.mobile-nav-link:hover{background-color:var(--bg-elevated);color:var(--text-primary)}.mobile-nav-link.active{color:var(--brand-primary);font-weight:600;background-color:var(--brand-primary-light)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.65rem 1.25rem;font-size:.95rem;font-weight:600;line-height:1.4;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;-webkit-user-select:none;user-select:none;white-space:nowrap;transition:all var(--transition-fast);text-decoration:none}.btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.btn:disabled,.btn[aria-disabled=true]{opacity:.55;cursor:not-allowed;pointer-events:none}.btn-primary{background-color:var(--brand-primary);color:#ffffff}.btn-primary:hover{background-color:var(--brand-primary-hover);box-shadow:0 4px 12px var(--brand-primary-glow)}.btn-merge{background-color:var(--accent-merge);color:#ffffff}.btn-merge:hover{background-color:var(--accent-merge-hover);box-shadow:var(--shadow-merge-glow)}.btn-split{background-color:var(--accent-split);color:#ffffff}.btn-split:hover{background-color:var(--accent-split-hover);box-shadow:var(--shadow-split-glow)}.btn-outline{background-color:transparent;border-color:var(--border-medium);color:var(--text-primary)}.btn-outline:hover{background-color:var(--bg-elevated);border-color:var(--text-secondary)}.btn-ghost{background-color:transparent;color:var(--text-secondary)}.btn-ghost:hover{background-color:var(--bg-elevated);color:var(--text-primary)}.btn-danger{background-color:var(--color-danger);color:#ffffff}.btn-danger:hover{background-color:#dc2626}.btn-sm{padding:.4rem .75rem;font-size:.85rem}.btn-lg{padding:.85rem 1.75rem;font-size:1.05rem;border-radius:var(--radius-lg)}.card{background-color:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.card-hover:hover{box-shadow:var(--shadow-md);border-color:var(--border-medium)}.card-header{margin-bottom:1.25rem}.card-title{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.card-subtitle{font-size:.9rem;color:var(--text-muted);margin-top:.25rem}.tool-banner-card{background-color:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:2.5rem 1.75rem;box-shadow:var(--shadow-md);overflow:hidden}.dropzone,.tool-banner-card{text-align:center;position:relative}.dropzone{border:2px dashed var(--border-medium);border-radius:var(--radius-lg);background-color:var(--bg-subtle);padding:3rem 1.5rem;cursor:pointer;transition:all var(--transition-normal);outline:none}.dropzone:focus-visible,.dropzone:hover{border-color:var(--brand-primary);background-color:var(--brand-primary-light)}.dropzone.dropzone-active{border-color:var(--brand-primary);background-color:var(--brand-primary-light);transform:scale(1.01)}.dropzone-icon-box{width:64px;height:64px;border-radius:var(--radius-xl);background-color:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--brand-primary);display:inline-flex;align-items:center;justify-content:center;margin-bottom:1rem;box-shadow:var(--shadow-sm);transition:transform var(--transition-fast)}.dropzone:hover .dropzone-icon-box{transform:translateY(-2px)}.dropzone-title{font-size:1.15rem;font-weight:700;color:var(--text-primary);margin-bottom:.35rem}.dropzone-desc{font-size:.9rem;color:var(--text-muted);margin-bottom:1.25rem}.dropzone-file-input{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.file-list{display:flex;flex-direction:column;gap:.75rem;margin-top:1.5rem}.file-card{display:flex;align-items:center;justify-content:space-between;gap:1rem;background-color:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.85rem 1rem;box-shadow:var(--shadow-xs);transition:all var(--transition-fast)}.file-card:hover{border-color:var(--border-medium);box-shadow:var(--shadow-sm)}.file-card-left{display:flex;align-items:center;gap:.75rem;min-width:0}.file-order-badge{display:inline-flex;width:24px;height:24px;border-radius:var(--radius-full);background-color:var(--bg-elevated);font-size:.75rem;font-weight:700;color:var(--text-muted)}.file-icon-box,.file-order-badge{align-items:center;justify-content:center;flex-shrink:0}.file-icon-box{width:36px;height:36px;border-radius:var(--radius-sm);background-color:var(--color-danger-bg);border:1px solid var(--color-danger-border);color:var(--color-danger);display:flex}.file-info{display:flex;flex-direction:column;min-width:0}.file-name{font-size:.95rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-meta{font-size:.8rem;color:var(--text-muted);gap:.5rem}.file-actions,.file-meta{display:flex;align-items:center}.file-actions{gap:.35rem;flex-shrink:0}.file-action-btn{width:32px;height:32px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle);background-color:var(--bg-surface);color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.file-action-btn:hover{background-color:var(--bg-elevated);color:var(--text-primary);border-color:var(--border-medium)}.file-action-btn.btn-remove:hover{background-color:var(--color-danger-bg);border-color:var(--color-danger-border);color:var(--color-danger)}.badge{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .65rem;border-radius:var(--radius-full);font-size:.8rem;font-weight:600;line-height:1}.badge-merge{background-color:var(--accent-merge-subtle);border:1px solid var(--accent-merge-border);color:var(--accent-merge)}.badge-split{background-color:var(--accent-split-subtle);border:1px solid var(--accent-split-border);color:var(--accent-split)}.badge-success{background-color:var(--color-success-bg);border:1px solid var(--color-success-border);color:var(--color-success)}.badge-warning{background-color:var(--color-warning-bg);border:1px solid var(--color-warning-border);color:var(--color-warning)}.badge-danger{background-color:var(--color-danger-bg);border:1px solid var(--color-danger-border);color:var(--color-danger)}.badge-neutral{background-color:var(--bg-elevated);border:1px solid var(--border-subtle);color:var(--text-secondary)}.alert{display:flex;align-items:flex-start;gap:.75rem;padding:1rem 1.25rem;border-radius:var(--radius-md);font-size:.925rem;line-height:1.5;margin-top:1rem;margin-bottom:1rem}.alert-icon{flex-shrink:0;margin-top:2px}.alert-content{flex:1 1}.alert-title{font-weight:700;margin-bottom:.25rem}.alert-info{background-color:var(--color-info-bg);border:1px solid var(--color-info-border);color:var(--color-info)}.alert-success{background-color:var(--color-success-bg);border:1px solid var(--color-success-border);color:var(--color-success)}.alert-warning{background-color:var(--color-warning-bg);border:1px solid var(--color-warning-border);color:var(--color-warning)}.alert-error{background-color:var(--color-danger-bg);border:1px solid var(--color-danger-border);color:var(--color-danger)}.progress-track{width:100%;height:8px;background-color:var(--bg-elevated);overflow:hidden;margin:1rem 0}.progress-fill,.progress-track{border-radius:var(--radius-full)}.progress-fill{height:100%;transition:width .3s ease}.progress-fill-merge{background:linear-gradient(90deg,#4f46e5,#818cf8)}.progress-fill-split{background:linear-gradient(90deg,#0d9488,#34d399)}.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:currentcolor;border-radius:50%;animation:spin .8s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(1turn)}}.form-group{margin-bottom:1.25rem}.form-label{display:block;font-size:.9rem;font-weight:600;color:var(--text-primary);margin-bottom:.4rem}.form-input,.form-select,.form-textarea{width:100%;padding:.65rem .9rem;border:1px solid var(--border-medium);border-radius:var(--radius-md);background-color:var(--bg-input);color:var(--text-primary);font-size:.95rem;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--border-focus);box-shadow:0 0 0 3px var(--brand-primary-glow)}.form-hint{color:var(--text-muted)}.form-error,.form-hint{font-size:.8rem;margin-top:.35rem}.form-error{color:var(--color-danger)}.site-footer{background-color:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:3.5rem 0 2rem;margin-top:auto}.footer-grid{display:grid;grid-template-columns:1fr;gap:2.5rem;margin-bottom:2.5rem}@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.5fr}}.footer-col-title{font-size:.95rem;font-weight:700;color:var(--text-primary);margin-bottom:1rem;text-transform:uppercase;letter-spacing:.04em}.footer-links{list-style:none;display:flex;flex-direction:column;gap:.65rem}.footer-link{font-size:.9rem;color:var(--text-muted);transition:color var(--transition-fast)}.footer-link:hover{color:var(--brand-primary)}.footer-bottom{display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:1rem;padding-top:2rem;border-top:1px solid var(--border-subtle);font-size:.85rem;color:var(--text-muted);text-align:center}@media (min-width:640px){.footer-bottom{flex-direction:row;text-align:left}}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.zoom-preview-btn{position:absolute;top:6px;right:6px;width:36px;height:36px;min-width:36px;min-height:36px;padding:0;margin:0;border-radius:var(--radius-sm);background-color:var(--accent-split);border:1.5px solid var(--accent-split-border);color:#ffffff;box-shadow:0 2px 6px rgba(15,118,110,.35),0 1px 3px rgba(0,0,0,.12);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;transition:all var(--transition-fast);line-height:1}.zoom-preview-btn .zoom-icon-svg{display:block;width:19px;height:19px;stroke:#ffffff;stroke-width:2.4;color:#ffffff;opacity:1;flex-shrink:0;pointer-events:none}.zoom-preview-btn:hover{background-color:var(--accent-split-hover);border-color:var(--accent-split);color:#ffffff;transform:scale(1.08);box-shadow:0 4px 12px rgba(15,118,110,.45)}.zoom-preview-btn:active{transform:scale(.96)}.zoom-preview-btn:focus-visible{outline:2px solid var(--accent-split);outline-offset:2px}.zoom-toolbar-btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;padding:6px 10px;min-height:36px;min-width:36px;border-radius:var(--radius-sm);background-color:var(--bg-surface);border:1px solid var(--border-medium);color:var(--text-primary);font-size:.85rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.zoom-toolbar-btn:hover:not(:disabled){background-color:var(--bg-elevated);border-color:var(--accent-split);color:var(--accent-split)}.zoom-toolbar-btn:focus-visible{outline:2px solid var(--accent-split);outline-offset:2px}.zoom-toolbar-btn:disabled{opacity:.4;cursor:not-allowed;border-color:var(--border-subtle)}.merge-workspace-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding-bottom:1.25rem;border-bottom:1px solid var(--border-subtle);margin-bottom:1.25rem}.merge-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.25rem;margin:1.25rem 0}@media (max-width:640px){.merge-grid{grid-template-columns:repeat(auto-fill,minmax(145px,1fr));gap:.85rem}}@media (max-width:360px){.merge-grid{grid-template-columns:1fr;gap:.75rem}}.merge-doc-card{position:relative;display:flex;flex-direction:column;background-color:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--radius-md);padding:.65rem;box-shadow:var(--shadow-xs);transition:transform var(--transition-fast),box-shadow var(--transition-fast),border-color var(--transition-fast);cursor:grab;-webkit-user-select:none;user-select:none}.merge-doc-card:hover{border-color:var(--border-medium);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.merge-doc-card:focus-visible{outline:2px solid var(--accent-merge);outline-offset:2px}.merge-doc-card.is-dragging{opacity:.4;border:2px dashed var(--accent-merge);transform:scale(.97);cursor:grabbing}.merge-doc-card.is-drag-over{border:2px solid var(--accent-merge);box-shadow:0 0 0 3px var(--accent-merge-subtle),var(--shadow-md);transform:scale(1.02)}.merge-card-header{display:flex;align-items:center;justify-content:space-between;gap:.4rem;margin-bottom:.5rem}.merge-card-header-left{display:flex;align-items:center;gap:.35rem}.merge-drag-handle{color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;cursor:grab;padding:2px;border-radius:var(--radius-xs);transition:color var(--transition-fast)}.merge-drag-handle:hover{color:var(--text-primary)}.merge-card-header-actions{display:flex;align-items:center;gap:.25rem}.merge-mini-btn{width:26px;height:26px;min-width:26px;min-height:26px;padding:0;border-radius:var(--radius-xs);border:1px solid var(--border-subtle);background-color:var(--bg-surface);color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast)}.merge-mini-btn:hover:not(:disabled){background-color:var(--bg-elevated);color:var(--text-primary);border-color:var(--border-medium)}.merge-mini-btn:disabled{opacity:.3;cursor:not-allowed}.merge-mini-btn.btn-remove:hover:not(:disabled){background-color:var(--color-danger-bg);color:var(--color-danger);border-color:var(--color-danger-border)}.merge-card-thumb-container{width:100%;aspect-ratio:3/4;border-radius:var(--radius-sm);background-color:var(--bg-elevated);overflow:hidden;border:1px solid var(--border-subtle);position:relative;margin-bottom:.6rem}.merge-card-thumb-container,.merge-zoom-btn{display:flex;align-items:center;justify-content:center}.merge-zoom-btn{position:absolute;top:6px;right:6px;width:36px;height:36px;min-width:36px;min-height:36px;padding:0;margin:0;border-radius:var(--radius-sm);background-color:var(--accent-merge);border:1.5px solid var(--accent-merge-border);color:#ffffff;box-shadow:0 2px 6px rgba(79,70,229,.35),0 1px 3px rgba(0,0,0,.12);cursor:pointer;z-index:10;transition:all var(--transition-fast);line-height:1}.merge-zoom-btn .zoom-icon-svg{display:block;width:19px;height:19px;stroke:#ffffff;stroke-width:2.4;color:#ffffff;opacity:1;flex-shrink:0;pointer-events:none}.merge-zoom-btn:hover{background-color:var(--accent-merge-hover);border-color:var(--accent-merge);color:#ffffff;transform:scale(1.08);box-shadow:0 4px 12px rgba(79,70,229,.45)}.merge-zoom-btn:active{transform:scale(.96)}.merge-zoom-btn:focus-visible{outline:2px solid var(--accent-merge);outline-offset:2px}.merge-rotate-btn{position:absolute;bottom:6px;right:6px;width:34px;height:34px;min-width:34px;min-height:34px;padding:0;margin:0;border-radius:var(--radius-sm);background-color:var(--bg-surface);border:1.5px solid var(--border-medium);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10;transition:all var(--transition-fast);box-shadow:0 2px 4px rgba(0,0,0,.1)}.merge-rotate-btn:hover{background-color:var(--accent-merge-subtle);border-color:var(--accent-merge);color:var(--accent-merge);transform:scale(1.08);box-shadow:0 4px 8px rgba(79,70,229,.25)}.merge-rotate-btn:active{transform:scale(.95)}.merge-rotate-btn:focus-visible{outline:2px solid var(--accent-merge);outline-offset:2px}.merge-card-footer{display:flex;flex-direction:column;gap:.2rem;min-width:0}.merge-card-title{font-size:.875rem;font-weight:700;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.3}.merge-card-meta{font-size:.775rem;color:var(--text-muted);display:flex;align-items:center;justify-content:space-between;gap:.35rem;flex-wrap:wrap}.merge-rotation-badge{display:inline-flex;align-items:center;gap:2px;padding:1px 6px;border-radius:var(--radius-xs);background-color:var(--accent-merge-subtle);color:var(--accent-merge);font-size:.725rem;font-weight:700;border:1px solid var(--accent-merge-border)}