:root{--word-blue: #2b579a;--excel-green: #217346;--ribbon-bg: #f3f2f1;--ribbon-border: #e1dfdd;--page-bg: #f3f2f1;--paper: #ffffff;--ink: #1b1b1b;--muted: #605e5c;--accent: var(--word-blue);--grid-line: #d4d4d4;--grid-head: #f5f5f5;--grid-head-active: #d7e3d7;--cell-sel: #217346;--shadow: 0 1px 3px rgba(0, 0, 0, .16), 0 6px 20px rgba(0, 0, 0, .08);font-family:Segoe UI,system-ui,-apple-system,sans-serif;color:var(--ink)}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}#root{display:flex;flex-direction:column;background:var(--page-bg)}.appbar{display:flex;align-items:center;gap:12px;padding:6px 12px;background:var(--accent);color:#fff;min-height:40px}.appbar.mode-sheet{background:var(--excel-green)}.appbar__brand{font-weight:600;letter-spacing:.2px}.appbar__doc{opacity:.9;font-size:13px}.appbar__spacer{flex:1}.appbar button{background:#ffffff26;border:1px solid rgba(255,255,255,.35);color:#fff;border-radius:4px;padding:4px 10px;font-size:13px;cursor:pointer}.appbar button:hover{background:#ffffff47}.presence{display:flex;align-items:center}.presence__avatar{width:28px;height:28px;border-radius:50%;color:#fff;font-size:12px;font-weight:600;display:grid;place-items:center;border:2px solid #fff;margin-left:-8px}.status-pill{font-size:12px;padding:2px 8px;border-radius:10px;background:#fff3}.status-pill.disconnected{background:#b91c1c}.tabs{display:flex;background:var(--ribbon-bg);border-bottom:1px solid var(--ribbon-border)}.tabs button{border:none;background:transparent;padding:8px 18px;font-size:14px;cursor:pointer;color:var(--muted);border-bottom:3px solid transparent}.tabs button.active{color:var(--ink);border-bottom-color:var(--accent);font-weight:600}.tabs button.active.sheet{border-bottom-color:var(--excel-green)}.ribbon{display:flex;gap:4px;align-items:center;padding:6px 10px;background:var(--ribbon-bg);border-bottom:1px solid var(--ribbon-border);flex-wrap:wrap}.ribbon__group{display:flex;gap:2px;align-items:center;padding:0 8px;border-right:1px solid var(--ribbon-border)}.ribbon__group:last-child{border-right:none}.ribbon button,.ribbon select{min-width:30px;height:30px;border:1px solid transparent;background:transparent;border-radius:4px;cursor:pointer;font-size:14px;color:var(--ink);padding:0 6px}.ribbon button:hover,.ribbon select:hover{background:#fff;border-color:var(--ribbon-border)}.ribbon button.on{background:#d7e3f4;border-color:#a9c0e4}.ribbon .color-btn{display:inline-flex;align-items:center;gap:3px;height:30px;padding:0 5px;border:1px solid transparent;border-radius:4px;cursor:pointer;font-weight:700}.ribbon .color-btn:hover{background:#fff;border-color:var(--ribbon-border)}.ribbon .color-btn input[type=color]{width:18px;height:18px;min-width:18px;border:1px solid var(--ribbon-border);border-radius:3px;padding:0;background:none;cursor:pointer}.content{flex:1;overflow:auto}.page-wrap{display:flex;justify-content:center;padding:24px}.page{background:var(--paper);width:816px;max-width:100%;min-height:1056px;padding:72px 84px;box-shadow:var(--shadow)}.page .ProseMirror{outline:none;min-height:900px;line-height:1.5;font-size:15px}.page .ProseMirror p{margin:0 0 10px}.page .ProseMirror h1{font-size:26px}.page .ProseMirror h2{font-size:21px}.ProseMirror-focused{outline:none}.collab-cursor{position:relative;margin-left:-1px;margin-right:-1px;border-left:2px solid;border-right:0;word-break:normal;pointer-events:none}.collab-cursor__label{position:absolute;top:-1.4em;left:-2px;font-size:11px;line-height:1;color:#fff;padding:2px 4px;border-radius:3px 3px 3px 0;white-space:nowrap;-webkit-user-select:none;user-select:none}.sheet{display:flex;flex-direction:column;height:100%}.formula-bar{display:flex;align-items:center;gap:8px;padding:4px 8px;background:#fff;border-bottom:1px solid var(--grid-line)}.name-box{min-width:64px;text-align:center;font-size:13px;border:1px solid var(--grid-line);border-radius:3px;padding:3px 6px;background:#fafafa}.formula-bar .fx{color:var(--muted);font-style:italic}.formula-bar input{flex:1;border:1px solid var(--grid-line);border-radius:3px;padding:4px 8px;font-size:14px;font-family:Segoe UI,system-ui,sans-serif}.grid-scroll{flex:1;overflow:auto;background:#fff}table.grid{border-collapse:collapse;table-layout:fixed}table.grid th,table.grid td{border:1px solid var(--grid-line);height:24px;font-size:13px}table.grid th{background:var(--grid-head);color:var(--muted);font-weight:500;position:sticky;z-index:1;min-width:46px}table.grid thead th{top:0}table.grid th.rowhead{left:0;min-width:40px;width:40px}table.grid th.active{background:var(--grid-head-active);color:var(--ink)}table.grid td{width:92px;min-width:92px;padding:2px 6px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;cursor:cell;position:relative}table.grid td.num{text-align:right}table.grid td.selected{outline:2px solid var(--cell-sel);outline-offset:-2px}table.grid td .author-dot{position:absolute;top:1px;right:1px;width:5px;height:5px;border-radius:50%}.sheet-tabs{display:flex;gap:2px;padding:4px 8px;background:var(--ribbon-bg);border-top:1px solid var(--grid-line)}.sheet-tabs .tab{padding:4px 14px;font-size:13px;background:#fff;border:1px solid var(--grid-line);border-bottom:2px solid var(--excel-green);border-radius:3px 3px 0 0}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:grid;place-items:center;z-index:50}.modal{background:#fff;border-radius:8px;padding:24px;width:380px;max-width:92vw;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}.modal h2{margin:0;font-size:18px}.modal p{margin:0;font-size:13px;color:var(--muted)}.modal input{padding:8px 10px;font-size:15px;border:1px solid var(--grid-line);border-radius:4px}.modal button{background:var(--accent);color:#fff;border:none;border-radius:4px;padding:9px;font-size:15px;cursor:pointer}.modal button:disabled{opacity:.5;cursor:default}.modal-hint{font-size:11px!important;color:#b45309!important}.side-panel{position:fixed;top:0;right:0;width:320px;height:100%;background:#fff;box-shadow:var(--shadow);z-index:40;display:flex;flex-direction:column}.side-panel header{padding:12px 16px;border-bottom:1px solid var(--ribbon-border);display:flex;align-items:center;justify-content:space-between}.side-panel header h3{margin:0;font-size:15px}.side-panel .list{overflow:auto;flex:1}.version{padding:10px 16px;border-bottom:1px solid var(--ribbon-border);font-size:13px}.version .label{font-weight:600}.version .meta{color:var(--muted);font-size:12px;display:flex;align-items:center;gap:6px;margin:3px 0 6px}.version .dot{width:9px;height:9px;border-radius:50%}.version button{font-size:12px;padding:3px 8px;border:1px solid var(--grid-line);border-radius:3px;background:#fafafa;cursor:pointer;margin-right:6px}.save-version-row{display:flex;gap:6px;padding:10px 16px;border-bottom:1px solid var(--ribbon-border)}.save-version-row input{flex:1;border:1px solid var(--grid-line);border-radius:3px;padding:5px 8px}.save-version-row button{background:var(--excel-green);color:#fff;border:none;border-radius:3px;padding:5px 10px;cursor:pointer}.admin{display:flex;flex-direction:column;height:100%}.admin__bar{display:flex;align-items:center;gap:10px;padding:10px 16px;background:var(--word-blue);color:#fff}.admin__bar button{background:#ffffff26;border:1px solid rgba(255,255,255,.35);color:#fff;border-radius:4px;padding:5px 10px;cursor:pointer;font-size:13px}.admin__bar button:hover{background:#ffffff47}.admin__body{flex:1;overflow:auto;padding:20px}.admin__table{width:100%;border-collapse:collapse;background:var(--paper);box-shadow:var(--shadow)}.admin__table th,.admin__table td{text-align:left;padding:9px 14px;border-bottom:1px solid var(--ribbon-border);font-size:14px}.admin__table th{background:var(--ribbon-bg);font-weight:600}.admin__btn{display:inline-block;padding:4px 10px;margin-right:6px;border:1px solid var(--grid-line);border-radius:4px;background:#fafafa;color:var(--ink);text-decoration:none;font-size:13px;cursor:pointer}.admin__btn:hover{background:#fff}.admin__btn.danger{color:#b91c1c;border-color:#e3b3b3}.admin__btn.danger:hover{background:#fdecec}@media(prefers-color-scheme:dark){:root{--ribbon-bg: #2b2b2b;--ribbon-border: #3d3d3d;--page-bg: #1e1e1e;--paper: #262626;--ink: #ededed;--muted: #a6a6a6;--grid-line: #3d3d3d;--grid-head: #2b2b2b;--grid-head-active: #2f4636}.page .ProseMirror{color:var(--ink)}.ribbon button:hover,.ribbon select:hover{background:#333}.grid-scroll,.formula-bar,table.grid td{background:var(--paper)}.modal,.side-panel{background:#262626}}