/* BMU cross-links (mm3books) */
.bmu-x{background:#fff;border-top:1px solid var(--rb-line,#E4E4E7);border-bottom:1px solid var(--rb-line,#E4E4E7)}
.bmu-x-inner{display:grid;grid-template-columns:220px 1fr;gap:36px;align-items:center;padding-block:34px}
.bmu-x-logo{display:block;padding:18px 20px;border:1px solid var(--rb-line,#E4E4E7);border-top:4px solid var(--rb-red,#C0201A);border-radius:4px;background:#fff}
.bmu-x-logo img{display:block;width:100%;height:auto}
.bmu-x .eyebrow{color:var(--rb-red,#C0201A)!important;letter-spacing:.12em;font-weight:700}
.bmu-x h2{font-family:var(--rb-serif,'DM Serif Display',Georgia,serif);color:var(--rb-ink,#0A0A0B);font-size:clamp(28px,3vw,36px);line-height:1.08;margin:8px 0 10px}
.bmu-x p{color:var(--rb-muted,#55555C);font-size:16px;max-width:620px;margin:0 0 6px}
.bmu-x-actions{display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center}
.bmu-x-actions .btn{flex:none;min-width:150px}
.bmu-x-more{font-weight:700;color:#1B2D4F;text-decoration:underline;text-underline-offset:3px}
.bmu-x-more:hover{color:var(--rb-red-deep,#961711)}
@media (max-width:700px){.bmu-x-inner{grid-template-columns:1fr;gap:18px;padding-block:26px}.bmu-x-logo{max-width:220px}}
.bmu-x-card{display:flex;gap:18px;align-items:center;padding:16px 18px;border:1px solid var(--rb-line,#E4E4E7);border-left:4px solid var(--rb-red,#C0201A);border-radius:4px;background:#fff;color:var(--rb-text,#141416);text-decoration:none;max-width:680px}
.bmu-x-card img{width:150px;height:auto;flex:none}
.bmu-x-card strong{display:block;font-size:17px;color:var(--rb-ink,#0A0A0B)}
.bmu-x-card span{display:block;color:var(--rb-muted,#55555C);font-size:15px}
.bmu-x-card:hover strong{color:var(--rb-red,#C0201A)}
@media (max-width:520px){.bmu-x-card{flex-direction:column;align-items:flex-start}.bmu-x-card img{width:140px}}
.bmu-x-course{display:flex;gap:12px;align-items:flex-start;margin:18px 0 6px;padding:12px 14px;border:1px solid var(--rb-line,#E4E4E7);border-left:4px solid #1B2D4F;border-radius:4px;background:#fff;color:var(--rb-text,#141416);font-size:15px;line-height:1.5;max-width:640px}
.bmu-x-course img{width:22px;height:auto;flex:none;margin-top:2px}
.bmu-x-course b{color:var(--rb-ink,#0A0A0B)}
.bmu-x-course a{color:var(--rb-red,#C0201A);font-weight:700;text-decoration:underline;text-underline-offset:3px}
.bmu-x-course .bmu-x-note{color:var(--rb-muted,#55555C)}