:root{color:#1d2433;background:#f5f6fa;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px}.prototype-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:28px clamp(18px,4vw,56px) 22px;background:#fff;border-bottom:1px solid #e5e6eb}.eyebrow{margin:0 0 8px;color:#7b2fb3;font-size:11px;font-weight:800;letter-spacing:.12em}h1{margin:0;font-size:clamp(24px,3vw,36px);letter-spacing:-.04em}.subtitle{max-width:680px;margin:8px 0 0;color:#5d6575;line-height:1.5}.prototype-status{display:flex;align-items:center;gap:9px;color:#596273;font-size:13px;white-space:nowrap}.status-dot{width:8px;height:8px;border-radius:50%;background:#31a36b;box-shadow:0 0 0 4px #e3f4eb}.grid-scroll{position:relative;height:min(62vh,620px);margin:0;overflow:auto;border:1px solid #dfe1e8;border-radius:0 0 14px 14px;background:#fff;box-shadow:0 12px 32px #191e2d14;outline:none}.grid-scroll:focus-visible{box-shadow:0 0 0 3px #9600f342,0 12px 32px #191e2d14}.grid-canvas-layer{position:sticky;z-index:2;top:0;width:100%;height:0;pointer-events:none}.grid-canvas{position:absolute;inset:0;display:block;pointer-events:auto}.grid-spacer{position:relative;z-index:0}.grid-editor{position:absolute;z-index:3;display:block;padding:5px 8px;border:2px solid #9600f3;border-radius:3px;outline:none;font:inherit}.grid-editor[hidden]{display:none}.accessible-mirror{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.helios-shell{display:flex;flex-direction:column;gap:0;min-height:100dvh;padding:20px clamp(12px,3vw,48px) 28px}.pre-release-notice{margin:0 0 12px;padding:9px 12px;border:1px solid #e6c77c;border-radius:8px;background:#fff8e7;color:#5f450b;font-size:13px;line-height:1.45}.shell-titlebar{display:flex;align-items:baseline;gap:14px;padding:6px 2px 12px}.shell-eyebrow{color:#7b2fb3;font-size:11px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.shell-title{margin:0;font-size:clamp(20px,2.4vw,28px);letter-spacing:-.02em}.shell-title:focus-visible{outline:3px solid rgba(150,0,243,.32);outline-offset:4px;border-radius:4px}.shell-title-rename{min-width:min(420px,70vw);padding:4px 8px;border:2px solid #9600f3;border-radius:6px;font:inherit;font-size:inherit;font-weight:inherit}.shell-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:6px;padding:10px 12px;border:1px solid #e5e6eb;border-bottom:0;border-radius:14px 14px 0 0;background:#fff}.shell-toolbar-button{min-height:32px;padding:0 10px;border:1px solid transparent;border-radius:8px;background:transparent;color:#1d2433;font:inherit;font-size:13px;cursor:pointer}.shell-toolbar-button:hover:not(:disabled){border-color:#e0d4f5;background:#f7f1fe}.shell-toolbar-button:disabled{opacity:.4;cursor:default}.shell-toolbar-button:focus-visible,.shell-tab:focus-visible,.shell-context-menu button:focus-visible{outline:3px solid rgba(150,0,243,.32);outline-offset:1px}.shell-toolbar select{min-height:32px;border:1px solid #e0e2ea;border-radius:8px;background:#fff;font:inherit;font-size:13px}.shell-toolbar-separator{width:1px;height:22px;background:#e5e6eb}.shell-formula-row{position:relative;display:flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid #e5e6eb;border-bottom:0;background:#fbfafd}.shell-name-box{width:88px;min-height:32px;padding:0 8px;border:1px solid #e0e2ea;border-radius:8px;font:inherit;font-size:13px;text-align:center}.shell-fx{color:#7b2fb3;font-style:italic;font-weight:700}.shell-formula-input{flex:1;min-height:32px;padding:0 10px;border:1px solid #e0e2ea;border-radius:8px;font:inherit;font-size:13px;font-variant-numeric:tabular-nums}.shell-formula-status{min-width:90px;font-size:12px;color:#596273}.shell-formula-status.warn{color:#b42318;font-weight:700}.shell-suggestions{position:absolute;z-index:20;top:calc(100% - 4px);left:120px;min-width:260px;border:1px solid #e0d4f5;border-radius:10px;background:#fff;box-shadow:0 12px 28px #191e2d24;overflow:hidden}.shell-suggestion{display:flex;gap:8px;padding:8px 12px;font-size:13px;cursor:pointer}.shell-suggestion:hover{background:#f7f1fe}.shell-suggestion span{color:#596273}.shell-find-panel{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;padding:10px 12px;border:1px solid #e0d4f5;border-bottom:0;background:#fff}.shell-find-panel[hidden]{display:none}.shell-find-fields,.shell-find-options,.shell-find-actions{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.shell-find-fields{flex:1 1 280px}.shell-find-fields input{min-width:120px;min-height:32px;flex:1 1 120px;padding:0 9px;border:1px solid #e0e2ea;border-radius:8px;font:inherit;font-size:13px}.shell-find-options{color:#596273;font-size:12px}.shell-find-options label{display:inline-flex;align-items:center;gap:4px;white-space:nowrap}.shell-find-actions{margin-left:auto}.shell-find-status{flex:1 0 100%;min-height:18px;color:#596273;font-size:12px}.shell-grid-host{border:0}.grid-column-headers{position:absolute;z-index:4;top:0;left:46px;right:0;height:26px;overflow:hidden;background:#f7f5fa;border-bottom:1px solid #dfe1e8;pointer-events:none}.grid-row-headers{position:absolute;z-index:4;top:26px;bottom:0;left:0;width:46px;overflow:hidden;background:#f7f5fa;border-right:1px solid #dfe1e8;pointer-events:none}.grid-corner{position:absolute;z-index:5;top:0;left:0;width:46px;height:26px;border-right:1px solid #dfe1e8;border-bottom:1px solid #dfe1e8;background:#f5f3ff;cursor:pointer}.grid-column-header,.grid-row-header{position:absolute;top:0;display:flex;align-items:center;justify-content:center;border-right:1px solid #e5e6eb;border-bottom:1px solid #e5e6eb;background:#f7f5fa;color:#4f176f;font-size:12px;font-weight:600;pointer-events:auto;cursor:pointer;-webkit-user-select:none;user-select:none}.grid-row-header{left:0;width:46px;border-right:1px solid #e5e6eb}.grid-column-header.active,.grid-row-header.active{background:#efe3fd;color:#4f176f}.grid-fill-handle{position:absolute;z-index:4;width:10px;height:10px;border:1px solid #fff;border-radius:2px;background:#9600f3;cursor:crosshair}.shell-tab-bar{display:flex;align-items:center;gap:4px;padding:8px 12px;border:1px solid #e5e6eb;border-top:0;border-radius:0 0 14px 14px;background:#fff;overflow-x:auto}.shell-tab-list{display:flex;align-items:center;gap:4px}.shell-tab{min-height:32px;padding:0 14px;border:1px solid transparent;border-bottom:2px solid transparent;border-radius:8px 8px 0 0;background:transparent;font:inherit;font-size:13px;cursor:pointer;white-space:nowrap}.shell-tab[aria-selected=true]{border-bottom-color:#9600f3;background:#f7f1fe;font-weight:700}.shell-tab-add{min-width:32px;min-height:32px;border:1px dashed #c9bdec;border-radius:8px;background:transparent;color:#6d00c2;font-size:16px;cursor:pointer}.shell-tab-rename{width:120px;font:inherit;font-size:13px}.shell-status-bar{display:flex;justify-content:space-between;gap:16px;padding:10px 4px 0;color:#596273;font-size:12px}.shell-errors{position:fixed;z-index:30;right:16px;bottom:16px;display:flex;flex-direction:column;gap:8px;max-width:min(420px,calc(100vw - 32px))}.shell-error-toast{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px 10px 16px;border:1px solid #f3c2bd;border-radius:12px;background:#fff5f4;color:#7a271a;font-size:13px;box-shadow:0 12px 28px #191e2d29}.shell-error-toast button{flex:none;min-height:28px;padding:0 10px;border:1px solid #f3c2bd;border-radius:8px;background:#fff;font:inherit;font-size:12px;cursor:pointer}.shell-context-menu{position:fixed;z-index:40;display:flex;flex-direction:column;min-width:200px;padding:6px;border:1px solid #e0d4f5;border-radius:12px;background:#fff;box-shadow:0 16px 36px #191e2d2e}.shell-context-menu button{padding:8px 12px;border:0;border-radius:8px;background:transparent;font:inherit;font-size:13px;text-align:left;cursor:pointer}.shell-context-menu button:hover:not(:disabled){background:#f7f1fe}.shell-context-menu button:disabled{opacity:.45;cursor:default}.release-banner-host{position:fixed;z-index:10;top:12px;left:50%;transform:translate(-50%);width:min(760px,calc(100% - 24px))}.release-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 14px 12px 20px;border:1px solid #c7d3ea;border-radius:999px;background:#fffffff7;box-shadow:0 12px 28px #141a2824;color:#172033}.release-banner button{min-height:40px;padding:0 18px;border:0;border-radius:999px;background:#1769f5;color:#fff;font:inherit;font-weight:700;cursor:pointer}.release-banner button:focus-visible{outline:3px solid rgba(23,105,245,.32);outline-offset:3px}@media(max-width:700px){.prototype-header{flex-direction:column;padding:22px 18px}.prototype-status{white-space:normal}.grid-scroll{height:66dvh;margin:16px 12px}.release-banner{border-radius:18px;font-size:14px}}@media(max-width:520px){.shell-formula-row{flex-wrap:wrap}.shell-formula-input{min-width:0}.shell-formula-status{width:100%;min-width:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}