:root{--accent:#6d28d9;--accent-dark:#3b0764;--accent-soft:#f3e8ff;--text:#111827;--muted:#667085;--line:#e5e7eb;--surface:#fff;--bg:#f7f7fb;--danger:#b42318}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--text);background:var(--bg)}button,input{font:inherit}.theme-electricidad{--accent:#c48a00;--accent-dark:#5c3a00;--accent-soft:#fff7d6}.theme-mecanica{--accent:#0f766e;--accent-dark:#123f3c;--accent-soft:#e8faf7}.portal-layout{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.08fr) 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