.bcs-stack{grid-template-columns:repeat(2,1fr);gap:20px;max-width:760px;margin:0 auto;display:grid}.bcs-stack__node{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:24px 22px;transition:border-color .3s,transform .3s;position:relative}.bcs-stack__node:hover{border-color:var(--accent);transform:translateY(-3px)}.bcs-stack__node-label{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:6px;font-size:11px}.bcs-stack__node h3{margin-bottom:8px;font-size:1.15rem}.bcs-stack__node p{color:var(--muted);font-size:13px;line-height:1.6}.bcs-stack__hub{background-color:var(--text);color:#fff;text-align:center;background-image:linear-gradient(90deg,#fefbf512 1px,#0000 1px),linear-gradient(#fefbf512 1px,#0000 1px);background-size:48px 28px;border-radius:10px;grid-column:1/-1;margin:4px 0;padding:28px 24px;position:relative;overflow:hidden}.bcs-stack__hub:before{content:"";background:#a8553526;border-bottom:1px solid #fefbf51f;height:22px;position:absolute;top:0;left:0;right:0}.bcs-stack__hub>*{position:relative}.bcs-stack__hub-label{font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;opacity:.6;margin-bottom:6px;font-size:11px}.bcs-stack__hub h3{color:#fff;margin-bottom:6px;font-size:1.35rem}.bcs-stack__hub p{color:#ffffffbf;max-width:480px;margin:0 auto;font-size:14px;line-height:1.55}@media (max-width:600px){.bcs-stack{grid-template-columns:1fr}}