/* Evolución del SNII 1984–hoy: gráfica de línea (una sola serie, blanco y negro) */
.sni-evo{
  --evo-line:#4a4a4a; --evo-fill:rgba(17,17,17,.10);
  --evo-surface:var(--bs-card-bg,var(--bs-body-bg,#fcfcfb));
  --evo-ink:var(--bs-body-color,#0b0b0b);
  --evo-ink2:var(--bs-secondary-color,#52514e);
  --evo-grid:rgba(127,127,127,.28);
  --evo-tip-bg:#111; --evo-tip-ink:#fff;
  position:relative; margin:0; color:var(--evo-ink); font-size:.95rem; line-height:1.45;
}
.sni-evo.is-dark{
  --evo-line:#f5f5f5; --evo-fill:rgba(245,245,245,.12);
  --evo-ink:#f0efec; --evo-ink2:#c3c2b7;
  --evo-tip-bg:#f5f5f5; --evo-tip-ink:#111;
}
.sni-evo__plot{position:relative;width:100%}
.sni-evo__svg{display:block;width:100%;height:auto;overflow:visible;touch-action:pan-y;-webkit-tap-highlight-color:transparent}
.sni-evo__svg text{font-family:inherit;fill:var(--evo-ink2);font-size:12px}
.sni-evo__svg .sni-evo__val{fill:var(--evo-ink);font-weight:600;font-size:13px}
.sni-evo__tip{position:absolute;z-index:2;pointer-events:none;background:var(--evo-tip-bg);color:var(--evo-tip-ink);
  border-radius:8px;padding:.4rem .65rem;font-size:.85rem;line-height:1.3;white-space:nowrap;
  box-shadow:0 4px 14px rgba(0,0,0,.18);opacity:0;transition:opacity .08s}
.sni-evo__tip.is-on{opacity:1}
.sni-evo__tip strong{display:block;font-size:1.05rem;font-weight:600}
.sni-evo__tip span{opacity:.8}
.sni-evo__svg .sni-evo__nota{font-size:11.5px;paint-order:stroke;stroke:var(--evo-surface);stroke-width:4px;stroke-linejoin:round}
.sni-evo__cap{margin:.6rem 0 0;color:var(--evo-ink2);font-size:.82rem}
/* Aislamiento frente a estilos del tema */
.sni-evo__svg *{box-sizing:content-box}
@media (prefers-reduced-motion:reduce){.sni-evo__tip{transition:none}}