@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap";:root{color-scheme:light;--bg:#f4f5f7;--bg-elevated:#fff;--bg-canvas:#fbfbfc;--border:#dde1e7;--text:#14171c;--text-muted:#5b6472;--accent:#2f63e0;--accent-contrast:#fff;--accent-soft:#2f63e01a;--ruler-tick:#b7bcc4;--ruler-tick-major:#363c44;--ruler-label:#4a505a;--danger:#d1445a;--radius-sm:6px;--radius-md:12px;--radius-lg:16px;--shadow-modal:0 24px 60px #14171c38;--shadow-tooltip:0 6px 18px #14171c47;--font-ui:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;--toolbar-h:54px;--ruler-thick:42px}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#0a0d12;--bg-elevated:#10141b;--bg-canvas:#0d1017;--border:#232935;--text:#e7ebf1;--text-muted:#8b93a1;--accent:#4f8cff;--accent-contrast:#0a0d12;--accent-soft:#4f8cff29;--ruler-tick:#454d5a;--ruler-tick-major:#c7cdd7;--ruler-label:#aab2bf;--shadow-modal:0 24px 60px #0000008c;--shadow-tooltip:0 6px 18px #00000080}}:root[data-theme=dark]{color-scheme:dark;--bg:#0a0d12;--bg-elevated:#10141b;--bg-canvas:#0d1017;--border:#232935;--text:#e7ebf1;--text-muted:#8b93a1;--accent:#4f8cff;--accent-contrast:#0a0d12;--accent-soft:#4f8cff29;--ruler-tick:#454d5a;--ruler-tick-major:#c7cdd7;--ruler-label:#aab2bf;--shadow-modal:0 24px 60px #0000008c;--shadow-tooltip:0 6px 18px 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hidden}.brand{white-space:nowrap;flex:none;align-items:center;gap:8px;margin-right:4px;padding:6px 10px 6px 4px;font-size:15px;font-weight:700;display:flex}.brand svg{width:20px;height:20px;color:var(--accent);flex:none}.brand span.dim{color:var(--text-muted);font-weight:500}.tbar-group{border-radius:var(--radius-md);flex:none;align-items:center;gap:2px;padding:3px;display:flex}.tbar-sep{background:var(--border);flex:none;align-self:stretch;width:1px;margin:8px 4px}.tbar-spacer{flex:auto;min-width:4px}.icon-btn{border-radius:var(--radius-sm);cursor:pointer;width:36px;height:36px;color:var(--text-muted);background:0 0;border:none;flex:none;justify-content:center;align-items:center;transition:background .12s,color .12s;display:inline-flex}.icon-btn svg{width:18px;height:18px}.icon-btn:hover{background:var(--accent-soft);color:var(--text)}.icon-btn[aria-pressed=true]{background:var(--accent-soft);color:var(--accent)}.icon-btn.text{white-space:nowrap;gap:6px;width:auto;padding:0 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(width<=360px){.toolbar{gap:2px}.brand{font-size:12px}.icon-btn{width:32px;min-width:32px;height:32px;min-height:32px}.icon-btn.text{min-width:32px;min-height:32px;padding-left:5px;padding-right:5px;font-size:9px}.unit-toggle button{padding-left:6px;padding-right:6px;font-size:10px}}@media (width<=900px) and (orientation:landscape) and (height<=520px){.toolbar{flex:none;height:auto;min-height:46px;max-height:none;padding-top:2px;padding-bottom:2px;overflow:hidden visible}.brand{font-size:13px}.icon-btn{width:32px;min-width:32px;height:32px;min-height:32px}.icon-btn.text{min-height:32px}}.error-shell{background:var(--bg);flex-direction:column;min-height:100dvh;display:flex}.error-nav{width:100%;max-width:none;padding-left:max(24px, env(safe-area-inset-left));padding-right:max(24px, env(safe-area-inset-right))}.error-code-mini{font:600 12px/1 var(--font-mono);color:var(--text-muted);letter-spacing:.08em}.error-card{text-align:center;width:min(720px,100% - 36px);margin:auto;padding:72px 0}.error-code{font:600 clamp(72px, 15vw, 132px) / .9 var(--font-mono);letter-spacing:-.06em;color:var(--accent);opacity:.95;margin-bottom:16px}.error-kicker{font:600 12px/1.2 var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);margin:0 0 10px}.error-card h1{letter-spacing:-.035em;margin:0 0 14px;font-size:clamp(30px,5vw,46px);line-height:1.05}.error-message{max-width:620px;color:var(--text-muted);margin:0 auto;font-size:16px;line-height:1.7}.error-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:28px;display:flex}.error-actions a{border-radius:var(--radius-sm);justify-content:center;align-items:center;min-height:44px;padding:0 18px;font-size:14px;font-weight:600;text-decoration:none;transition:background .12s,border-color .12s,color .12s,transform .12s;display:inline-flex}.error-actions a:hover{transform:translateY(-1px)}.error-primary{background:var(--accent);color:var(--accent-contrast)!important}.error-primary:hover{opacity:.92}.error-secondary{border:1px solid var(--border);background:var(--bg-elevated);color:var(--text)!important}.error-secondary:hover{border-color:var(--accent);color:var(--accent)!important}.error-help{color:var(--text-muted);font:500 12px/1.4 var(--font-mono);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-top:24px;display:inline-flex}.error-help strong{color:var(--text)}.error-footer{width:100%;max-width:none;padding-left:max(24px, env(safe-area-inset-left));padding-right:max(24px, env(safe-area-inset-right));padding-bottom:max(40px, calc(24px + env(safe-area-inset-bottom)))}@media (width<=640px){.error-nav{padding-left:18px;padding-right:18px}.error-card{width:min(100% - 36px,640px);padding:54px 0}.error-card h1{font-size:32px}.error-message{font-size:15px}.error-actions{flex-direction:column}.error-actions a{width:100%}.error-footer{padding-left:18px;padding-right:18px}}