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var(--shadow-strong)}.loading-overlay{position:fixed;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:var(--scrim-light);z-index:250;pointer-events:none}.loading-overlay[hidden]{display:none}.loading-overlay .loading-spinner{width:40px;height:40px;border:4px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:loading-spin .8s linear infinite}.loading-overlay .loading-progress{width:220px;height:8px;appearance:none;border:none;border-radius:4px;overflow:hidden}.loading-overlay .loading-progress::-webkit-progress-bar{background:var(--border);border-radius:4px}.loading-overlay .loading-progress::-webkit-progress-value{background:var(--accent);border-radius:4px;transition:width .15s ease-out}.loading-overlay .loading-progress::-moz-progress-bar{background:var(--accent);border-radius:4px}.loading-overlay .loading-progress[hidden]{display:none}.loading-overlay .loading-label{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 20px;font-size:14px;color:var(--text);box-shadow:0 8px 24px var(--shadow)}@keyframes loading-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.loading-overlay .loading-spinner{animation:none}}.toasts{position:fixed;right:14px;bottom:38px;display:flex;flex-direction:column;gap:8px;z-index:300;max-width:380px}.toast{background:var(--tooltip-bg);color:var(--tooltip-text);border-radius:6px;padding:10px 14px;box-shadow:0 6px 18px var(--shadow-strong);line-height:1.45;overflow-wrap:anywhere}.toast.warn{background:var(--toast-warn-bg)}.toast.error{background:var(--toast-error-bg)}:focus-visible{outline:2px solid var(--accent);outline-offset:1px}@media(forced-colors:active){.vcell.selected,.vcell.anchor,:focus-visible{outline-color:Highlight}}@media(max-width:700px){.menu-bar{flex-wrap:wrap}.menu-bar-toggle{display:inline-flex;align-items:center;justify-content:center;margin-left:auto;min-width:44px;min-height:44px;font-size:20px}.menu-row{display:none;flex-basis:100%;flex-direction:column;align-items:stretch}.menu-bar.mobile-open .menu-row{display:flex}.menu-row .menu>button{width:100%;text-align:left}.menu>button,.menu-item{padding:12px 14px;min-height:44px}.tab{padding:10px 10px 10px 14px}.tab .tab-close{padding:10px;min-width:36px;min-height:36px}.sheet-tab,.sheet-add{padding:11px 12px;min-height:40px}.dialog-buttons button{padding:10px 16px;min-height:44px}.find-bar button{padding:8px 12px;min-height:40px}.welcome-action{padding:12px 20px;min-height:44px}.dialog-body input[type=text],.dialog-body input[type=number],.dialog-body input[type=search],.dialog-body select{font-size:16px}.find-bar input[type=text]{font-size:16px;width:100%}.formula-bar textarea{font-size:max(16px,calc(13px * var(--sheet-zoom, 1)))}.vgrid-canvas .grid-sink.cell-editor{font-size:max(16px,calc(12px * var(--sheet-zoom, 1)))}.form-row{flex-wrap:wrap}.form-row label:first-child{min-width:100%}.form-row select,.form-row input[type=number]{width:100%;min-width:0}.filter-condition-row{flex-wrap:wrap}.filter-condition-row select,.filter-condition-row input{min-width:0;max-width:100%}.sort-key-row{flex-wrap:wrap}.sort-key-row select{min-width:0;max-width:100%}}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.vcell.fref-0{background-color:#2563eb24}.vcell.fref-1{background-color:#16a34a1f;background-image:repeating-linear-gradient(45deg,transparent 0 6px,rgba(22,163,74,.14) 6px 8px)}.vcell.fref-2{background-color:#d977061f;background-image:repeating-linear-gradient(-45deg,transparent 0 6px,rgba(217,119,6,.14) 6px 8px)}.vcell.fref-3{background-color:#9333ea1f;background-image:repeating-linear-gradient(0deg,transparent 0 6px,rgba(147,51,234,.14) 6px 8px)}.vcell.fref-0.fref-top{border-top:2px solid var(--fref-1)}.vcell.fref-0.fref-bottom{border-bottom:2px solid var(--fref-1)}.vcell.fref-0.fref-left{border-left:2px solid var(--fref-1)}.vcell.fref-0.fref-right{border-right:2px solid var(--fref-1)}.vcell.fref-1.fref-top{border-top:2px dashed var(--fref-2)}.vcell.fref-1.fref-bottom{border-bottom:2px dashed var(--fref-2)}.vcell.fref-1.fref-left{border-left:2px dashed var(--fref-2)}.vcell.fref-1.fref-right{border-right:2px dashed var(--fref-2)}.vcell.fref-2.fref-top{border-top:2px dotted var(--fref-3)}.vcell.fref-2.fref-bottom{border-bottom:2px dotted var(--fref-3)}.vcell.fref-2.fref-left{border-left:2px dotted var(--fref-3)}.vcell.fref-2.fref-right{border-right:2px dotted var(--fref-3)}.vcell.fref-3.fref-top{border-top:3px double var(--fref-4)}.vcell.fref-3.fref-bottom{border-bottom:3px double var(--fref-4)}.vcell.fref-3.fref-left{border-left:3px double var(--fref-4)}.vcell.fref-3.fref-right{border-right:3px double var(--fref-4)}.ref-indicator{position:fixed;z-index:60;background:var(--panel);border:1px solid var(--border);border-radius:4px;padding:3px 8px;font-size:12px;color:var(--text-dim);box-shadow:0 2px 6px var(--shadow);pointer-events:none}.ref-indicator[hidden]{display:none}.welcome-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:40px;text-align:center;background:var(--surface);overflow:auto}.welcome-screen[hidden]{display:none}.welcome-icon{width:72px;height:72px;flex:none;border-radius:16px;display:block}.welcome-title{margin:0;font-size:22px}.welcome-subtitle{margin:0;color:var(--text-dim)}.welcome-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:10px 0 2px}.welcome-action{border:1px solid var(--accent);background:var(--surface);color:var(--accent);border-radius:5px;padding:9px 18px;font-size:14px;cursor:pointer}.welcome-action.primary{background:var(--accent);color:var(--accent-contrast)}.welcome-action:hover{background:var(--accent-soft);color:var(--accent)}.welcome-drop{margin:6px 0 0;border:2px dashed var(--border);border-radius:8px;padding:14px 26px;color:var(--text-dim)}.welcome-note{margin:0;max-width:560px;color:var(--text-dim);font-size:12px;line-height:1.6}#app.welcome-mode .tab-bar,#app.welcome-mode .formula-bar,#app.welcome-mode .find-bar,#app.welcome-mode .grid-container{display:none}.tab.dragging{opacity:.5}.tab.drop-before{box-shadow:inset 3px 0 0 var(--accent)}.tab.drop-after{box-shadow:inset -3px 0 0 var(--accent)}