.bc-app{margin:24px 0}.bc-form,.bc-results{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:12px;padding:20px;margin-bottom:20px}.bc-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.bc-vars-toggle:after{content:"\25b8";display:inline-block;opacity:.7;transition:transform .15s ease}.bc-vars-toggle[aria-expanded=true]:after{transform:rotate(90deg)}.bc-vars-panel{margin-top:12px;border:1px solid var(--border-light);border-radius:8px;padding:12px 14px;background:var(--bg-primary)}.bc-examples{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px}.bc-examples-title{font-size:.88rem;font-weight:600;opacity:.85}.bc-example{padding:4px 10px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.85rem;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-light);border-radius:14px;cursor:pointer}.bc-example:hover{border-color:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.bc-label{display:block;font-weight:600;margin-bottom:8px}.bc-label-vars{margin-top:0;margin-bottom:6px}.bc-input{width:100%;box-sizing:border-box;padding:12px 14px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:15px;background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-light);border-radius:8px;resize:vertical}.bc-input:focus,.bc-vars:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.bc-vars{width:100%;box-sizing:border-box;padding:10px 14px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:14px;background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-light);border-radius:8px}.bc-options{border:1px solid var(--border-light);border-radius:8px;padding:14px 16px;margin:18px 0;display:flex;flex-wrap:wrap;gap:10px 20px}.bc-options-title{font-weight:600;width:100%;padding:0;margin-bottom:4px}.bc-option{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-size:.95rem}.bc-option input{width:1.05em;height:1.05em;accent-color:var(--accent)}.bc-option-row{display:inline-flex;align-items:center;gap:6px}.bc-tip{position:relative;display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;padding:0;font-family:inherit;font-size:.72rem;font-weight:700;line-height:1;color:var(--text-primary);background:var(--bg-tertiary);border:1px solid var(--border-light);border-radius:50%;cursor:help}.bc-tip:hover,.bc-tip:focus-visible{border-color:var(--accent);outline:none}.bc-tip-bubble{position:absolute;left:50%;bottom:calc(100% + 8px);transform:translate(-50%);width:max-content;max-width:min(240px,calc(100vw - 48px));padding:10px 12px;font-size:.82rem;font-weight:400;line-height:1.45;text-align:left;white-space:normal;color:var(--text-primary);background:var(--bg-primary);border:1px solid var(--border-light);border-radius:8px;box-shadow:0 6px 24px #0000002e;display:none;z-index:5;pointer-events:none}.bc-tip:hover .bc-tip-bubble,.bc-tip:focus .bc-tip-bubble,.bc-tip:focus-visible .bc-tip-bubble{display:block}.bc-build{margin-top:14px}.bc-error{color:#e94560;font-weight:600;margin-top:12px;margin-bottom:0}.bc-keyboard-panel{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.bc-keyboard-panel[hidden]{display:none}.bc-key{min-width:44px;padding:8px 10px;font-size:16px;font-family:inherit;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-light);border-radius:6px;cursor:pointer}.bc-key:hover{border-color:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.bc-results.bc-empty{display:none}.bc-block{border-bottom:1px solid var(--border-light);padding:14px 0}.bc-block:last-child{border-bottom:none}.bc-block-title{color:var(--accent);margin-bottom:8px}.bc-block-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.bc-block-head .bc-block-title{margin-bottom:0}.bc-more{font-size:.85rem;white-space:nowrap}.bc-final-cta{display:block;text-align:center;margin:8px 0 24px}.bc-final-cta[hidden]{display:none}.bc-formula{margin:8px 0;overflow-wrap:anywhere}.bc-formula-code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:15px;background:var(--bg-tertiary);padding:2px 8px;border-radius:6px}.bc-copy{margin-bottom:8px}.bc-meta,.bc-solution-note,.bc-warning,.bc-map-limit{font-size:.9rem;opacity:.85;overflow-wrap:anywhere}.bc-warning{color:#d97706}.bc-table{width:100%;border-collapse:collapse;margin:12px 0 6px}.bc-table th,.bc-table td{border:1px solid var(--border-light);padding:6px 10px;text-align:center;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;white-space:nowrap}.bc-table thead th{background:var(--bg-tertiary)}.bc-table td.bc-result,.bc-table th.bc-result{background:var(--accent-glow)}.bc-table-wrap{overflow-x:auto}.bc-solution{margin-top:10px;padding-left:12px;border-left:3px solid var(--border-light)}.bc-solution-title{margin:0 0 6px;font-size:1rem}.bc-solution-list{margin:4px 0;padding-left:22px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9rem}.bc-zh-steps{border-collapse:collapse;margin:8px 0}.bc-zh-steps th,.bc-zh-steps td{border:1px solid var(--border-light);padding:4px 10px;text-align:center;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9rem}.bc-zh-coeff{overflow-wrap:anywhere;max-width:560px}.bc-mono-list{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88rem;overflow-wrap:anywhere}.bc-keyboard{margin-top:14px}.bc-post-list{list-style:none;padding:0;margin:8px 0}.bc-post-item{padding:8px 0;border-bottom:1px solid var(--border-light)}.bc-badge{display:inline-block;padding:1px 10px;border-radius:10px;font-size:.85rem;font-weight:600}.bc-badge-yes{background:#2ea04333;color:#2ea043}.bc-badge-no{background:#e9456029;color:#e94560}.bc-post-proof{opacity:.85}.bc-min-item{margin:12px 0}.bc-min-label{margin:0 0 6px;font-size:1rem}.bc-kg{border-collapse:collapse;margin:10px 0}.bc-kg-caption{caption-side:top;text-align:left;font-size:.9rem;opacity:.85;margin-bottom:4px}.bc-kg th,.bc-kg td{border:1px solid var(--border-light);padding:4px 10px;text-align:center;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9rem;min-width:34px}.bc-kg thead th{background:var(--bg-tertiary);font-weight:600}.bc-kg tbody th{background:var(--bg-tertiary)}.bc-kg .bc-kg-corner{background:transparent;border-left:none;border-top:none}.bc-kg td.bg0{background:#3399ff59}.bc-kg td.bg1{background:#ffaa3359}.bc-kg td.bg2{background:#66cc6659}.bc-kg td.bg3{background:#ed64a659}.bc-kg td.bg4{background:#9966ff59}.bc-kg td.bg5{background:#00b4b459}.bc-kg-legend{list-style:none;padding:0;margin:6px 0;display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.9rem}.bc-kg-legend-item{display:inline-flex;align-items:center;gap:6px}.bc-kg-swatch{display:inline-block;width:14px;height:14px;border-radius:3px;border:1px solid var(--border-light)}.bc-kg-swatch.bg0{background:#3399ff59}.bc-kg-swatch.bg1{background:#ffaa3359}.bc-kg-swatch.bg2{background:#66cc6659}.bc-kg-swatch.bg3{background:#ed64a659}.bc-kg-swatch.bg4{background:#9966ff59}.bc-kg-swatch.bg5{background:#00b4b459}@media(max-width:640px){.bc-form,.bc-results{padding:14px}.bc-tip-bubble{max-width:min(200px,calc(100vw - 32px))}.bc-key{min-width:38px;padding:6px 8px;font-size:15px}}