:root{--surface:#ffffff;--surface-muted:#f8fafc;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#475569;--shadow-soft:0 10px 30px rgba(15,23,42,0.08);--bca-accent:#6366f1;--bca-accent-soft:rgba(99,102,241,0.12);--bca-glow:rgba(99,102,241,0.35);--bca-chip-radius:14px;--bca-touch:48px;}
.bca-workbench{margin:0 0 2.5rem;padding:0;}
.bca-workbench-inner{background:var(--surface);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-soft);overflow:hidden;}
.bca-workbench-grid{display:block;}
.bca-left-pane{padding:1rem;background:var(--surface-muted);border-right:0;}
.bca-right-pane{min-width:0;background:var(--surface);display:none;}
.bca-workbench-grid.bca-workbench-grid--loaded{display:grid;grid-template-columns:1fr;gap:0;}
@media (min-width:992px){.bca-workbench-grid.bca-workbench-grid--loaded{grid-template-columns:minmax(300px,360px) 1fr;}.bca-workbench-grid.bca-workbench-grid--loaded .bca-left-pane{border-right:1px solid var(--border);}}
.bca-workbench-grid.bca-workbench-grid--loaded .bca-right-pane{display:block;}
.bca-dropzone{position:relative;min-height:min(52vh,420px);padding:clamp(1.25rem,4vw,2rem);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;text-align:center;background:linear-gradient(160deg,var(--bca-accent-soft) 0%,transparent 55%),var(--surface-muted);cursor:pointer;transition:border-color 0.2s ease,box-shadow 0.2s ease;}
.bca-dropzone:focus{outline:2px solid var(--bca-accent);outline-offset:2px;}
.bca-dropzone.bca-dropzone--active{box-shadow:0 0 0 3px var(--bca-glow);border-color:var(--bca-accent);}
.bca-left-pane.bca-left-pane--loaded .bca-dropzone{display:none;}
.bca-file-ready{display:none;border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:1rem;}
.bca-left-pane.bca-left-pane--loaded .bca-file-ready{display:block;}
.bca-dropzone-icon{width:56px;height:56px;color:var(--bca-accent);opacity:0.9;}
.bca-dropzone-title{font-size:clamp(1.05rem,2.8vw,1.25rem);font-weight:600;margin:0;color:var(--text-main);}
.bca-dropzone-hint{font-size:0.875rem;color:var(--text-muted);margin:0;max-width:280px;line-height:1.45;}
.bca-dropzone-meta{font-size:0.75rem;letter-spacing:0.04em;text-transform:uppercase;color:var(--text-muted);margin:0;}
.bca-toolbar{display:flex;padding:1rem 0 0;background:transparent;}
.bca-toolbar-actions{display:flex;flex-wrap:wrap;gap:0.5rem;align-items:center;width:100%;}
.bca-btn{min-height:var(--bca-touch);padding:0 1.15rem;border-radius:12px;font-weight:600;font-size:0.9rem;border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;transition:transform 0.15s ease,opacity 0.15s ease;}
.bca-btn:active{transform:scale(0.98);}
.bca-btn--primary{background:var(--bca-accent);color:#fff;}
.bca-btn--primary:disabled{opacity:0.45;cursor:not-allowed;}
.bca-btn--ghost{background:transparent;color:var(--text-main);border:1px solid var(--border);}
.bca-preview-wrap{display:none;padding:clamp(1rem,3vw,1.25rem);background:var(--surface-muted);}
.bca-preview-wrap.bca-preview-wrap--visible{display:block;}
.bca-preview-frame{max-width:100%;margin:0 auto;border-radius:16px;overflow:hidden;border:1px solid var(--border);background:repeating-conic-gradient(#e8e8e8 0% 25%,#fff 0% 50%) 50% / 16px 16px;}
.bca-preview-frame img{display:block;width:100%;height:auto;max-height:min(50vh,360px);object-fit:contain;}
.bca-results{margin:0;padding:0 0 2rem;}
.bca-results-inner{display:none;}
.bca-results-inner.bca-results-inner--visible{display:block;}
.bca-results-head{padding:0 clamp(1rem,3vw,1.25rem) 0.75rem;}
.bca-results-kicker{font-size:0.7rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--text-muted);margin:0 0 0.35rem;}
.bca-results-title{font-size:1.05rem;font-weight:600;margin:0;color:var(--text-main);}
.bca-stat-row{display:flex;flex-wrap:wrap;gap:0.75rem;padding:0 clamp(1rem,3vw,1.25rem) 1rem;}
.bca-stat{display:flex;flex-direction:column;min-width:calc(50% - 0.375rem);padding:0.65rem 0.85rem;border-radius:12px;background:var(--surface-muted);border:1px solid var(--border);}
@media (min-width:480px){.bca-stat{min-width:140px;flex:1;}}
.bca-stat-val{font-size:1.1rem;font-weight:700;color:var(--text-main);line-height:1.2;}
.bca-stat-lbl{font-size:0.7rem;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);margin-top:0.2rem;}
.bca-rail-wrap{padding:0 clamp(0.5rem,2vw,1rem) 1rem;overflow:hidden;}
.bca-rail{display:flex;gap:0.65rem;overflow-x:auto;padding:0.35rem 0.5rem 0.65rem;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:thin;}
.bca-rail::-webkit-scrollbar{height:6px;}
.bca-rail::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px;}
.bca-chip{flex:0 0 auto;scroll-snap-align:start;width:80px;border-radius:var(--bca-chip-radius);border:2px solid var(--border);overflow:hidden;cursor:pointer;background:var(--surface);transition:transform 0.15s ease,box-shadow 0.15s ease;padding:;}
.bca-chip:hover,.bca-chip:focus-visible{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.08);outline:none;}
.bca-chip-swatch{height:52px;width:100%;}
.bca-chip-meta{padding:0.35rem 0.4rem 0.45rem;text-align:center;}
.bca-chip-pct{font-size:0.7rem;font-weight:700;color:var(--text-main);}
.bca-chip-hex{font-size:0.62rem;font-family:ui-monospace,monospace;color:var(--text-muted);word-break:break-all;}
.bca-cards{padding:0 clamp(1rem,3vw,1.25rem) 0.5rem;display:flex;flex-direction:row;gap:0.65rem; flex-wrap: wrap;}
.bca-card{border-radius:14px;border:1px solid var(--border);background:var(--surface);overflow:hidden;width: calc(50% - 14px);}
.bca-card-hd{display:flex;align-items:center;gap:0.65rem;padding:0.65rem 0.85rem;border-bottom:1px solid var(--border);background:var(--surface-muted);}
.bca-card-dot{width:28px;height:28px;border-radius:8px;flex-shrink:0;border:1px solid rgba(0,0,0,0.06);}
.bca-card-hd-text{flex:1;min-width:0;}
.bca-card-name{font-size:0.8rem;font-weight:600;margin:0;color:var(--text-main);}
.bca-card-sub{font-size:0.72rem;color:var(--text-muted);margin:0.15rem 0 0;}
.bca-copy{flex-shrink:0;min-height:36px;padding:0 0.65rem;border-radius:10px;border:1px solid var(--border);background:var(--surface);font-size:0.72rem;font-weight:600;cursor:pointer;color:var(--text-main);}
.bca-copy:hover{background:var(--surface-muted);}
.bca-card-bd{padding:0.65rem 0.85rem;display:grid;gap:0.45rem;}
.bca-code-row{display:flex;flex-wrap:wrap;align-items:center;gap:0.35rem 0.5rem;}
.bca-code-label{font-size:0.65rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);min-width:2.5rem;}
.bca-code-val{font-family:ui-monospace,monospace;font-size:0.78rem;padding:0.25rem 0.5rem;border-radius:8px;background:var(--surface-muted);color:var(--text-main);word-break:break-all;}
.bca-toast{position:fixed;right:max(1rem,env(safe-area-inset-right));bottom:max(1rem,env(safe-area-inset-bottom));left:auto;transform:translateY(16px);opacity:0;visibility:hidden;z-index:9999;padding:0.72rem 1rem;border-radius:12px;background:rgba(15,23,42,0.92);color:#f8fafc;font-size:0.82rem;font-weight:600;line-height:1.35;letter-spacing:0.01em;box-shadow:0 12px 30px rgba(2,6,23,0.35);border:1px solid rgba(255,255,255,0.12);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);transition:opacity 0.22s ease,transform 0.22s ease,visibility 0s linear 0.22s;max-width:min(360px,calc(100vw - 2rem));pointer-events:none;text-align:left;}
.bca-toast.bca-toast--show{transform:translateY(0);opacity:1;visibility:visible;transition-delay:0s;}
@media (max-width:575px){.bca-toast{left:1rem;right:1rem;max-width:none;}}
.bca-prose-sect{padding:2rem 0 1rem;}
.bca-prose-sect h2{font-size:clamp(1.25rem,3vw,1.5rem);margin:0 0 0.75rem;color:var(--text-main);}
.bca-prose-sect h3{font-size:1.05rem;margin:1.5rem 0 0.5rem;color:var(--text-main);}
.bca-prose-sect p{font-size:0.95rem;line-height:1.65;color:var(--text-muted);margin:0 0 0.85rem;}
.bca-prose-sect p.bca-lead{font-size:1.02rem;color:var(--text-main);}
.bca-callout{border-left:3px solid var(--bca-accent);padding:0.75rem 1rem;margin:1.25rem 0;background:var(--bca-accent-soft);border-radius:0 12px 12px 0;}
.bca-callout p{margin:0;font-size:0.9rem;color:var(--text-main);}
.bca-dl{margin:1rem 0 0;padding:0;}
.bca-dl dt{font-size:0.72rem;text-transform:uppercase;letter-spacing:0.06em;color:var(--text-muted);margin:0.85rem 0 0.25rem;}
.bca-dl dt:first-child{margin-top:0;}
.bca-dl dd{margin:0;font-size:0.9rem;color:var(--text-main);line-height:1.55;}
.bca-table-wrap{overflow-x:auto;margin:1rem 0;border-radius:12px;border:1px solid var(--border);}
.bca-table{width:100%;border-collapse:collapse;font-size:0.85rem;}
.bca-table th,.bca-table td{padding:0.65rem 0.85rem;text-align:left;border-bottom:1px solid var(--border);}
.bca-table th{background:var(--surface-muted);color:var(--text-main);font-weight:600;}
.bca-table td{color:var(--text-muted);}
.bca-table tr:last-child th,.bca-table tr:last-child td{border-bottom:none;}