/* D14 Day 05: visual-first original arithmetic; ungraded and no market data */
.gu-bc-day05{margin:1.2rem 0;padding:1.2rem;border:1px solid var(--gold2,#bc9447);border-radius:12px;background:rgba(34,62,82,.24)}
.gu-bc-day05[hidden]{display:none}
.gu-bc-day05-grid{display:grid;grid-template-columns:minmax(210px,.85fr) minmax(0,1.15fr);gap:1.2rem;align-items:start}
.gu-bc-day05-figure{position:sticky;top:1rem;margin:0;padding:.9rem;border:1px solid rgba(255,255,255,.15);border-radius:10px;min-width:0}
.gu-bc-day05-figure svg{display:block;width:100%;max-width:320px;height:auto;max-height:420px;margin:0 auto;color:#f0ecda}
.gu-bc-day05-figure figcaption{font-size:.85rem;line-height:1.5}
.gu-bc-day05-questions{min-width:0}.gu-bc-day05-questions label{display:block;margin:.75rem 0}
.gu-bc-day05-questions input{display:block;min-height:42px;width:min(100%,260px);padding:.5rem;margin:.5rem 0;background:#091e2b;color:#fff;border:1px solid #7590a5;border-radius:7px}
.gu-bc-day05-equation{font-weight:700;overflow-wrap:anywhere}
.gu-bc-day05-choices{display:flex;flex-wrap:wrap;gap:.4rem;margin:1rem 0}
.gu-bc-day05-choices[hidden]{display:none}.gu-bc-day05-choices p{flex-basis:100%}
@media(max-width:760px){.gu-bc-day05-grid{grid-template-columns:1fr}.gu-bc-day05-figure{position:relative;top:auto}.gu-bc-day05-figure svg{max-height:280px}}