:root{color-scheme:dark;--bg: #16181d;--panel: #1e2127;--panel-2: #23262d;--border: #2e323a;--text: #e7e9ee;--text-dim: #9aa1ad;--accent: #2d70f7;--accent-soft: rgba(45, 112, 247, .16);--danger: #e5484d;--field-bg: #16181d;--shadow: 0 10px 30px rgba(0, 0, 0, .35)}:root[data-theme=light]{color-scheme:light;--bg: #f4f6fa;--panel: #ffffff;--panel-2: #f0f2f6;--border: #e0e4ec;--text: #1b1f27;--text-dim: #666e7c;--accent: #2d70f7;--accent-soft: rgba(45, 112, 247, .12);--danger: #d33a3f;--field-bg: #ffffff;--shadow: 0 10px 30px rgba(20, 30, 60, .12)}*{box-sizing:border-box}[hidden]{display:none!important}html,body,#app{height:100%;margin:0}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}.app{display:flex;height:100%}.sidebar{display:flex;flex-direction:column;width:340px;flex:0 0 340px;background:var(--panel);border-right:1px solid var(--border);padding:14px 12px;gap:10px;overflow:hidden}.brand{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:650;letter-spacing:.2px;padding:2px 4px 6px}.brand .logo{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--accent-soft);color:var(--accent);font-family:"Cambria Math",Georgia,serif;font-size:19px;font-style:italic}.expressions{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding-right:2px}.expr-wrap{display:flex;flex-direction:column;gap:2px}.expr{display:flex;align-items:center;gap:6px;background:var(--panel-2);border:1px solid transparent;border-radius:10px;padding:4px 6px 4px 4px}.expr:focus-within{border-color:var(--accent);background:var(--panel)}.expr-wrap.is-error .expr-input{color:var(--danger)}.expr-message{padding:0 8px 2px 26px;font-size:12px;color:var(--danger);min-height:0}.expr-wrap:not(.is-error) .expr-message{display:none}.expr-note{padding:0 8px 2px 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0;font-size:10px;line-height:1.6;cursor:pointer}.param-play:hover{border-color:var(--accent);color:var(--accent)}.param-play.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.param-name{font-family:"Cambria Math",ui-serif,Georgia,serif;font-size:15px;color:var(--text);text-align:center}.param input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}.param-value{width:100%;border:1px solid var(--border);border-radius:7px;background:var(--field-bg);color:var(--text);font-size:13px;padding:3px 5px;text-align:right;outline:none}.param-value:focus{border-color:var(--accent)}.add:hover,.ghost:hover{border-color:var(--accent);color:var(--accent)}.add{width:100%;text-align:left;font-weight:550}.add-actions{display:flex;gap:8px}.add-actions .add{flex:1}.table-head{display:flex;align-items:center;gap:6px;padding:4px 6px 4px 4px;background:var(--panel-2);border-radius:10px 10px 0 0}.table-title{flex:1;font-size:13px;color:var(--text-dim)}.table-grid{background:var(--panel-2);border-radius:0 0 10px 10px;padding:2px 6px 6px}.table-row{display:grid;grid-template-columns:1fr 1fr 26px;gap:6px;align-items:center}.table-header{padding-bottom:2px}.table-colname{font-family:"Cambria Math",ui-serif,Georgia,serif;font-size:14px;color:var(--text-dim);text-align:center}.table-cell{width:100%;border:1px solid var(--border);border-radius:7px;background:var(--field-bg);color:var(--text);padding:4px 6px;font-size:13px;outline:none}.table-cell:focus{border-color:var(--accent)}.table-add{margin-top:6px;width:100%;border:1px dashed var(--border);background:transparent;color:var(--text-dim);border-radius:8px;padding:6px;font-size:12px;cursor:pointer}.table-add:hover{border-color:var(--accent);color:var(--accent)}.sidebar-footer{display:flex;gap:8px}.sidebar-footer .ghost{flex:1}.sidebar-footer .ghost.icon-btn{flex:0 0 auto;padding:9px 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button:disabled:hover{background:transparent;color:var(--text)}.stage{position:relative;flex:1;min-width:0;background:var(--bg)}.stage-layer{position:absolute;inset:0}#graph,#gl,#overlay,#geo{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}#geo,#graph{cursor:crosshair}#graph.grabbing{cursor:grabbing}#gl{cursor:grab}#overlay{pointer-events:none}.mode-toggle{position:absolute;top:12px;right:12px;display:flex;gap:2px;padding:3px;border-radius:10px;border:1px solid var(--border);background:color-mix(in srgb,var(--panel) 85%,transparent);backdrop-filter:blur(4px)}.mode-toggle button{border:none;background:transparent;color:var(--text-dim);font-size:13px;font-weight:600;padding:4px 12px;border-radius:7px;cursor:pointer}.mode-toggle button:hover{color:var(--text)}.mode-toggle button.active{background:var(--accent-soft);color:var(--accent)}.geo-tools{display:flex;flex-direction:column;gap:10px}.tools-title{font-size:12px;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}.tool-grid button{border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:9px;padding:9px 8px;font-size:13px;cursor:pointer}.tool-grid button:hover{border-color:var(--accent)}.tool-grid button.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.tool-check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);cursor:pointer}.tool-actions{display:flex;gap:8px}.tool-actions .ghost{flex:1}.tool-hint{font-size:12px;color:var(--text-dim);line-height:1.5}.calc-layer{display:flex;align-items:center;justify-content:center;padding:20px}#calcMount{width:min(420px,100%);max-height:100%;display:flex}.calc{width:100%;max-height:100%;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}.calc-display{display:flex;flex-direction:column;gap:8px;padding:12px 14px}.calc-history{display:flex;flex-direction:column;gap:4px;overflow-y:auto;max-height:170px}.calc-history-line{display:flex;justify-content:space-between;gap:12px;border:none;background:transparent;color:var(--text-dim);font-size:14px;padding:3px 6px;border-radius:6px;cursor:pointer;text-align:left;font-family:"Cambria Math",ui-serif,Georgia,serif}.calc-history-line:hover{background:var(--panel-2);color:var(--text)}.calc-history-result{color:var(--text);white-space:nowrap}.calc-current{border-top:1px solid var(--border);padding-top:8px}.calc-input{width:100%;border:none;background:transparent;color:var(--text);font-size:24px;outline:none;font-family:"Cambria Math",ui-serif,Georgia,serif}.calc-preview{min-height:22px;font-size:15px;color:var(--text-dim);font-family:"Cambria Math",ui-serif,Georgia,serif}.calc-preview.is-error{color:var(--danger)}.calc-preview.is-assign{color:var(--accent)}.calc-vars{display:flex;flex-wrap:wrap;align-items:center;gap:6px}.calc-vars-label{font-size:12px;color:var(--text-dim)}.calc-var{border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:999px;padding:2px 10px;font-size:12px;cursor:pointer;font-family:"Cambria Math",ui-serif,Georgia,serif}.calc-var:hover{border-color:var(--accent);color:var(--accent)}.calc-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:6px 12px;border-top:1px solid var(--border)}.calc-bar-hint{font-size:12px;color:var(--text-dim)}.calc-deg{border:1px solid var(--border);background:var(--panel-2);color:var(--text-dim);border-radius:8px;padding:3px 12px;font-size:12px;font-weight:600;cursor:pointer}.calc-deg.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.calc-pad{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:12px;border-top:1px solid var(--border)}.calc-key{border:1px solid transparent;background:var(--panel-2);color:var(--text);border-radius:10px;padding:12px 6px;font-size:16px;cursor:pointer;font-family:"Cambria Math",ui-serif,Georgia,serif}.calc-key:hover{background:var(--border)}.calc-key.primary{background:var(--accent);color:#fff;font-weight:600}.calc-key.primary:hover{filter:brightness(1.08)}.stage-hint{position:absolute;left:50%;bottom:10px;transform:translate(-50%);font-size:12px;color:var(--text-dim);background:color-mix(in srgb,var(--panel) 82%,transparent);border:1px solid var(--border);padding:4px 10px;border-radius:999px;pointer-events:none;white-space:nowrap}@media (max-width: 720px){.app{flex-direction:column-reverse}.sidebar{width:100%;flex:0 0 auto;max-height:46%;border-right:none;border-top:1px solid var(--border)}}.cloud{display:flex;flex-direction:column;gap:8px;padding:8px;border:1px solid var(--border);border-radius:10px;background:var(--panel-2)}.cloud-head{display:flex;align-items:center;gap:8px}.cloud-title{flex:1;min-width:0;background:var(--field-bg);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 8px;font-size:13px}.cloud-user{font-size:12px;color:var(--text-dim);max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cloud-actions{display:flex;flex-wrap:wrap;gap:6px}.cloud-actions button{flex:1 1 auto}.modal{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}.modal-panel{width:min(560px,100%);max-height:80vh;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border);font-weight:600}.modal-body{padding:12px 14px;overflow:auto}.modal-note{color:var(--text-dim);font-size:13px;margin:6px 0}.modal-note code{background:var(--panel-2);padding:1px 5px;border-radius:5px}.modal-link{color:var(--accent)}.modal-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.modal-input{flex:1;min-width:160px;background:var(--field-bg);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:6px 8px}.modal-sep{height:1px;background:var(--border);margin:10px 0}.folder-head{display:flex;align-items:center;justify-content:space-between;margin-top:8px;font-size:13px;color:var(--text-dim)}.folder-tools{display:flex;gap:4px}.doc-list{list-style:none;margin:0;padding:0}.doc-row{display:flex;align-items:center;gap:6px;border-radius:8px}.doc-row:hover{background:var(--accent-soft)}.doc-open{flex:1;min-width:0;display:flex;justify-content:space-between;align-items:baseline;gap:10px;background:none;border:0;color:var(--text);text-align:left;padding:8px;cursor:pointer;border-radius:8px;font:inherit}.doc-name{display:flex;gap:8px;align-items:baseline;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.doc-date{color:var(--text-dim);font-size:12px;flex:0 0 auto}.doc-empty{color:var(--text-dim);font-size:13px;padding:6px 8px}.link-tools{display:flex;gap:4px}.toast-host{position:fixed;left:50%;bottom:22px;transform:translate(-50%);display:flex;flex-direction:column;gap:8px;z-index:100;pointer-events:none}.toast{background:var(--panel);border:1px solid var(--border);color:var(--text);padding:9px 14px;border-radius:10px;box-shadow:var(--shadow);font-size:13px;opacity:0;transform:translateY(8px);transition:opacity .25s,transform .25s}.toast.show{opacity:1;transform:translateY(0)}.toast.error{border-color:var(--danger);color:var(--danger)}