/* How to solve a Rubik's cube (beginner method). 3D view, net, palette and player styles come from cube/view.js. */
.bg-3d { margin: 0 -8px; }
.bg-viewbtns { margin-top: 4px; }
.bg-play { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 16px; }
.bg-play .eyebrow { margin: 0 0 4px; }
.bg-now { margin: 0 0 8px; font-size: 16px; color: var(--ink); min-height: 48px; }
.bg-how { margin: 0 0 12px; }
.bg-net { margin-top: 8px; }
.bg-go { margin-top: 20px; }
.bg-err-h { margin: 0 0 6px; font-weight: 600; }
.bg-errs { margin: 0; padding-left: 20px; }
.bg-walk .result { margin-top: 0; }
.bg-hold { margin: 12px 0; font-size: 15px; }
.bg-stages { list-style: none; margin: 12px 0 0; padding: 0; }
.bg-st { border-top: 1px solid var(--line); }
.bg-st summary { display: flex; justify-content: space-between; gap: 12px; padding: 12px 0; cursor: pointer; font-weight: 600; color: var(--ink); }
.bg-st.on summary .bg-st-t { text-decoration: underline; text-underline-offset: 4px; }
.bg-st-n { font-family: var(--mono); font-size: 12px; font-weight: 400; color: var(--muted); white-space: nowrap; align-self: center; }
.bg-steps { margin: 0 0 12px; padding: 0; list-style: none; counter-reset: s; }
.bg-step { display: block; width: 100%; text-align: left; font: inherit; font-size: 15px; color: var(--body); background: var(--canvas); border: 1px solid var(--line); border-radius: var(--r-md); padding: 10px 12px; margin-top: 6px; cursor: pointer; }
.bg-step:hover { border-color: var(--ink); }
.bg-steps li.on .bg-step { border-color: var(--ink); box-shadow: inset 3px 0 0 var(--ink); }
.bg-step code { display: block; margin-top: 6px; color: var(--ink); overflow-wrap: anywhere; }
/* guide */
.bg-demo { display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr); gap: 16px; align-items: center; background: var(--soft); border-radius: var(--r-lg); padding: 12px 20px 16px; margin: 8px 0 16px; min-height: 230px; }
.bg-demo .eyebrow { margin: 0 0 6px; }
.bg-demo-cap { margin: 0; font-size: 15px; color: var(--ink); min-height: 66px; }
.bg-demo-moves { font-size: 14px; }
.bg-demo-moves li { padding: 2px 7px; min-width: 32px; }
.bg-alg { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; background: var(--soft); border-radius: var(--r-md); padding: 12px 16px; margin: 10px 0; }
.bg-alg code { font-size: 18px; color: var(--ink); white-space: nowrap; }
.bg-alg span { font-size: 15px; color: var(--muted); }
@media (max-width: 600px) {
  .bg-demo { grid-template-columns: 1fr; padding: 8px 12px 14px; }
  .bg-alg code { white-space: normal; }
}