:root{color-scheme:light;--background:#f6f8fb;--foreground:#17202a;--muted:#51606f;--panel:#ffffff;--border:#d9e0e8;--navy:#0b1f3a;--accent-blue:#1e88e5;--cyan:#38bdf8;--orange:#f59e0b;--error:#b42318;--success:#0f766e}*{box-sizing:border-box}body{margin:0;background:var(--background);color:var(--foreground);font-family:Arial,Helvetica,sans-serif}.page{min-height:100vh;display:grid;align-content:start;grid-gap:24px;gap:24px;padding:32px}.auth-panel,.intro{width:min(720px,100%);background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:32px}.intro{justify-self:center}.eyebrow{margin:0 0 12px;color:var(--muted);font-size:14px;font-weight:700;text-transform:uppercase}h1{margin:0 0 16px;font-size:40px;line-height:1.1}p{color:var(--muted);font-size:18px;line-height:1.5}h2,p{margin:0}h2{font-size:24px;line-height:1.2}.auth-panel__header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.auth-form{display:grid;grid-gap:16px;gap:16px;margin-top:24px}label{display:grid;grid-gap:8px;gap:8px;color:var(--foreground);font-size:14px;font-weight:700}input,select{width:100%;border:1px solid var(--border);border-radius:6px;padding:12px;color:var(--foreground);font:inherit}.button{width:-moz-fit-content;width:fit-content;border:0;border-radius:6px;background:var(--success);color:#ffffff;cursor:pointer;font:inherit;font-weight:700;padding:12px 18px}.button:disabled{cursor:not-allowed;opacity:.6}.button-secondary{background:#334155}.message{margin-top:16px;color:var(--error);font-size:14px}.project-list{display:grid;grid-gap:12px;gap:12px;margin-top:24px}.project-row{display:grid;grid-gap:4px;gap:4px;border:1px solid var(--border);border-radius:6px;padding:12px}.project-row span{color:var(--muted);font-size:14px}.upload-form,.upload-panel{display:grid;grid-gap:16px;gap:16px}.upload-result,.upload-status{color:var(--muted);font-size:14px}.workspace{display:grid;grid-gap:24px;gap:24px;width:min(1180px,100%);justify-self:center}.workspace-header{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;border:1px solid var(--border);border-left:4px solid var(--accent-blue);border-radius:8px;background:var(--panel);padding:24px}.workspace-header h1{color:var(--navy);font-size:32px}.workspace-header p{font-size:16px}.workspace-header__actions{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:14px;white-space:nowrap}.workspace-grid{display:grid;grid-template-columns:minmax(280px,360px) minmax(0,1fr);grid-gap:24px;gap:24px;align-items:start}.workspace-main,.workspace-rail{display:grid;grid-gap:16px;gap:16px}.context-panel,.readiness-panel,.upload-panel,.viewer-panel{border:1px solid var(--border);border-radius:8px;background:var(--panel);padding:20px}.context-panel{display:grid;grid-gap:14px;gap:14px}.context-hint,.empty-state,.status-note{color:var(--muted);font-size:14px}.readiness-panel{display:grid;grid-gap:20px;gap:20px}.model-summary{display:grid;grid-gap:14px;gap:14px;border:1px solid var(--border);border-radius:8px;padding:16px}.model-summary__title{color:var(--foreground);font-size:18px;font-weight:700}.model-summary dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px;margin:0}.model-summary div{display:grid;grid-gap:4px;gap:4px}.model-summary dt{color:var(--muted);font-size:12px;font-weight:700;text-transform:uppercase}.model-summary dd{margin:0;color:var(--foreground);font-size:14px;overflow-wrap:anywhere}.chat-gate{display:grid;grid-gap:8px;gap:8px;border:1px dashed var(--border);border-radius:8px;background:#fbfcfe;padding:20px}.chat-gate--ready{border-color:var(--success);background:#f0fdfa}.chat-gate h3{margin:0;color:var(--navy);font-size:18px}.chat-gate p{font-size:15px}.viewer-panel{display:grid;grid-gap:16px;gap:16px}.viewer-panel__header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.viewer-panel__header p{font-size:15px}.viewer-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.viewer-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,280px);grid-gap:16px;gap:16px;align-items:stretch}.viewer-canvas-shell{position:relative;min-height:360px;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:#f8fafc}.viewer-canvas{width:100%;min-height:360px}.viewer-canvas canvas{display:block;width:100%;height:100%;cursor:crosshair}.viewer-canvas-status{position:absolute;left:12px;bottom:12px;max-width:calc(100% - 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