:root{--font-ui: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--bg: #0d0f13;--bg-panel: #14171d;--bg-raised: #1b1f27;--bg-input: #0b0d11;--bg-canvas: #101319;--bg-canvas-2d: #0f1217;--border: #262b35;--border-strong: #333a47;--text: #dfe4ec;--text-dim: #98a1b0;--text-faint: #6b7482;--accent: #4c8dff;--accent-dim: #2b4a80;--mountain: #e5484d;--valley: #4c8dff;--boundary: #b9c0cc;--flat: #6b7482;--cut: #22c55e;--aux: #8b5cf6;--ok: #2fbf71;--warn: #e0a91b;--err: #e5484d;--shadow: 0 8px 24px rgba(0, 0, 0, .45);color-scheme:dark}:root[data-theme=light]{--bg: #eef0f4;--bg-panel: #f7f8fa;--bg-raised: #ffffff;--bg-input: #ffffff;--bg-canvas: #e8eaef;--bg-canvas-2d: #fbfbfd;--border: #d5d9e0;--border-strong: #bcc2cc;--text: #1a1e26;--text-dim: #5a6270;--text-faint: #8b93a1;--accent: #1f6feb;--accent-dim: #b9d0f7;--boundary: #1c1f26;--shadow: 0 8px 24px rgba(20, 25, 35, 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