:root{--surface:#ffffff;--surface-muted:#f4f4f5;--border:#e4e4e7;--text-main:#18181b;--text-muted:#52525b;--primary:#6366f1;--primary-dark:#4f46e5;--accent:#22d3ee;--shadow-soft:0 12px 40px rgba(24,24,27,0.09);--gradient:linear-gradient(125deg,#6366f1 0%,#22d3ee 100%);--bc-ink:#09090b;--bc-glass:rgba(255,255,255,0.72);}
.bc-hero-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;padding:0;list-style:none;}
.bc-hero-meta li{margin:0;font-size:11px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-muted);background:var(--surface-muted);border:1px solid var(--border);border-radius:999px;padding:6px 12px;}
.bc-studio{margin:0 0 2.75rem;}
.bc-shell{background:var(--surface);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-soft);overflow:hidden;}
.bc-shell-inner{padding:clamp(14px,3.5vw,26px);}
.bc-file-input{position:absolute;width:0;height:0;opacity:0;pointer-events:none;}
.bc-dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:148px;padding:22px 18px;border:2px dashed var(--border);border-radius:18px;background:radial-gradient(120% 80% at 50% 0%,color-mix(in srgb,var(--primary) 10%,var(--surface-muted)) 0%,transparent 55%);cursor:pointer;transition:border-color 0.2s ease,box-shadow 0.2s ease;margin-bottom:18px;-webkit-tap-highlight-color:transparent;}
.bc-dropzone:hover,.bc-dropzone:focus-visible{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 22%,transparent);}
.bc-dropzone-icon{width:48px;height:48px;border-radius:14px;background:var(--gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 8px 24px color-mix(in srgb,var(--primary) 35%,transparent);}
.bc-dropzone-title{font-size:1.05rem;font-weight:700;color:var(--text-main);margin:0;text-align:center;}
.bc-dropzone-hint{font-size:0.8125rem;color:var(--text-muted);margin:0;text-align:center;max-width:300px;line-height:1.5;}
.bc-workgrid{display:none;gap:18px;}
.bc-studio.bc-has-image .bc-dropzone{display:none;}
.bc-studio.bc-has-image .bc-workgrid{display:grid;}
.bc-workgrid{grid-template-columns:1fr;}
@media (min-width:1024px){.bc-workgrid{grid-template-columns:minmax(0,1fr) minmax(280px,340px);align-items:start;gap:22px;}}
.bc-stage{display:flex;flex-direction:column;gap:14px;min-width:0;}
.bc-stage-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;}
.bc-stage-label{font-size:0.7rem;font-weight:800;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-muted);margin:0;}
.bc-dim-pill{font-size:11px;font-weight:600;color:var(--text-muted);background:var(--surface-muted);border:1px solid var(--border);border-radius:999px;padding:5px 11px;}
.bc-mosaic{display:grid;grid-template-columns:1fr;gap:14px;}
@media (min-width:640px){.bc-mosaic{grid-template-columns:1fr 1fr;}}
.bc-pane{background:var(--bc-ink);border-radius:16px;border:1px solid color-mix(in srgb,var(--border) 40%,var(--bc-ink));overflow:hidden;display:flex;flex-direction:column;}
.bc-pane-cap{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:color-mix(in srgb,#fff 6%,var(--bc-ink));}
.bc-pane-title{font-size:0.75rem;font-weight:700;letter-spacing:0.04em;text-transform:uppercase;color:#a1a1aa;margin:0;}
.bc-canvas-wrap{position:relative;background-image:linear-gradient(45deg,#27272a 25%,transparent 25%),linear-gradient(-45deg,#27272a 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#27272a 75%),linear-gradient(-45deg,transparent 75%,#27272a 75%);background-size:12px 12px;background-position:0 0,0 6px,6px -6px,-6px 0;}
.bc-canvas-inner{position:relative;padding:12px;display:flex;align-items:center;justify-content:center;min-height:200px;}
@media (min-width:640px){.bc-canvas-inner{min-height:220px;}}
.bc-canvas-inner>.image-canvas{max-width:100%;height:auto;display:none;border-radius:8px;vertical-align:middle;}
.bc-placeholder{position:absolute;inset:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#71717a;font-size:0.8125rem;text-align:center;padding:16px;}
.bc-placeholder i{font-size:2.25rem;opacity:0.5;}
.bc-hist{height:56px;padding:0 10px 10px;background:color-mix(in srgb,#fff 4%,var(--bc-ink));}
.bc-hist canvas{width:100%;height:100%;display:block;border-radius:6px;background:#18181b;}
.bc-rail{display:flex;flex-direction:column;gap:12px;position:relative;}
@media (min-width:1024px){.bc-rail{position:sticky;top:88px;}}
.bc-rail-card{background:var(--surface-muted);border:1px solid var(--border);border-radius:16px;padding:14px 16px;}
.bc-rail-title{font-size:0.65rem;font-weight:800;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-muted);margin:0 0 12px;}
.bc-slider-block{margin-bottom:14px;}
.bc-slider-block:last-child{margin-bottom:0;}
.bc-slider-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px;}
.bc-slider-name{font-size:0.8125rem;font-weight:600;color:var(--text-main);}
.bc-slider-val{font-size:0.8125rem;font-weight:700;font-variant-numeric:tabular-nums;color:var(--primary);}
.bc-slider-block input[type="range"]{width:100%;accent-color:var(--primary);height:6px;}
details.bc-details{border:1px solid var(--border);border-radius:14px;background:var(--surface);margin-bottom:10px;overflow:hidden;}
details.bc-details:last-of-type{margin-bottom:0;}
summary.bc-details-sum{cursor:pointer;list-style:none;font-size:0.75rem;font-weight:800;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-muted);padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px;-webkit-tap-highlight-color:transparent;}
summary.bc-details-sum::-webkit-details-marker{display:none;}
summary.bc-details-sum::after{content:"+";font-weight:400;font-size:1rem;color:var(--primary);}
details.bc-details[open] summary.bc-details-sum::after{content:"\2212";}
.bc-details-body{padding:0 14px 14px;}
.bc-preset-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px;}
.bc-preset-chip{font-size:0.75rem;font-weight:600;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text-main);cursor:pointer;transition:background 0.15s ease,border-color 0.15s ease,color 0.15s ease;-webkit-tap-highlight-color:transparent;}
.bc-preset-chip:hover,.bc-preset-chip:focus-visible{border-color:var(--primary);color:var(--primary-dark);}
.bc-actions-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px;}
.bc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:0.875rem;font-weight:600;padding:11px 14px;border-radius:12px;border:none;cursor:pointer;transition:transform 0.15s ease,box-shadow 0.15s ease;-webkit-tap-highlight-color:transparent;}
.bc-btn:active{transform:scale(0.98);}
.bc-btn--ghost{background:var(--surface);color:var(--text-main);border:1px solid var(--border);}
.bc-btn--tone{background:var(--gradient);color:#fff;box-shadow:0 8px 22px color-mix(in srgb,var(--primary) 35%,transparent);}
.bc-btn--tone:hover,.bc-btn--tone:focus-visible{box-shadow:0 10px 28px color-mix(in srgb,var(--primary) 45%,transparent);}
.bc-sticky-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:50;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:var(--bc-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--border);gap:8px;justify-content:stretch;}
@media (max-width:1023px){.bc-studio.bc-has-image .bc-sticky-bar{display:flex;}.bc-studio.bc-has-image .bc-shell-inner{padding-bottom:88px;}}
.bc-sticky-bar .bc-btn{flex:1;font-size:0.8125rem;padding:10px 8px;}
.bc-trust-note{font-size:0.75rem;color:var(--text-muted);line-height:1.45;margin:0;padding:10px 12px;border-radius:12px;background:color-mix(in srgb,var(--accent) 8%,var(--surface-muted));border:1px solid color-mix(in srgb,var(--accent) 22%,var(--border));}
.bc-article{margin:2.5rem 0;padding:0;}
.bc-article h2{font-size:clamp(1.35rem,3vw,1.75rem);font-weight:700;color:var(--text-main);margin:0 0 1rem;}
.bc-article h3{font-size:1.05rem;font-weight:700;color:var(--text-main);margin:1.75rem 0 0.65rem;}
.bc-article p,.bc-article li{color:var(--text-muted);line-height:1.65;font-size:0.9375rem;}
.bc-article p{margin:0 0 1rem;}
.bc-callout{border-left:4px solid var(--primary);padding:12px 16px;margin:1.25rem 0;background:var(--surface-muted);border-radius:0 12px 12px 0;}
.bc-callout p{margin:0;font-size:0.875rem;color:var(--text-main);}
.bc-split-grid{display:grid;gap:1.25rem;}
@media (min-width:768px){.bc-split-grid{grid-template-columns:1fr 1fr;}}
.bc-table-wrap{overflow-x:auto;margin:1rem 0;border:1px solid var(--border);border-radius:12px;}
.bc-table{width:100%;border-collapse:collapse;font-size:0.875rem;}
.bc-table th,.bc-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);}
.bc-table th{background:var(--surface-muted);color:var(--text-main);font-weight:600;}
.bc-table tr:last-child td{border-bottom:none;}
.bc-table td{color:var(--text-muted);}
.bc-article a{color:var(--primary-dark);text-decoration:underline;text-underline-offset:2px;}