: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}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-input{flex:1;min-width:0;border:none;background:transparent;color:inherit;font-size:15px;font-family:"Cambria Math",ui-serif,Georgia,Times New Roman,serif;padding:6px 2px;outline:none}.expr-input::placeholder{color:var(--text-dim);font-family:ui-sans-serif,system-ui,sans-serif}.swatch{flex:0 0 auto;width:14px;height:14px;border-radius:50%;border:2px solid color-mix(in srgb,var(--panel-2) 40%,transparent);cursor:pointer;padding:0}.icon{flex:0 0 auto;display:grid;place-items:center;width:26px;height:26px;border:none;border-radius:7px;background:transparent;color:var(--text-dim);cursor:pointer;font-size:18px;line-height:1;padding:0}.icon:hover{background:var(--accent-soft);color:var(--text)}.icon.remove:hover{color:var(--danger)}.add,.ghost{border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:10px;padding:9px 12px;font-size:14px;cursor:pointer}.params{display:flex;flex-direction:column;gap:4px;max-height:40%;overflow-y:auto;padding:8px 6px;border:1px solid var(--border);border-radius:10px;background:var(--panel-2)}.params-title{font-size:12px;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;padding:0 2px 2px}.param{display:grid;grid-template-columns:20px 1fr 62px;align-items:center;gap:8px}.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}.sidebar-footer{display:flex;gap:8px}.sidebar-footer .ghost{flex:1}.stage{position:relative;flex:1;min-width:0;background:var(--bg)}.stage-layer{position:absolute;inset:0}#graph,#gl,#overlay{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}#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)}.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)}}