:root{--primary:#059669;--primary-dark:#047857;--accent:#10b981;--surface:#ffffff;--surface-muted:#f4f6fb;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--shadow-soft:0 20px 45px rgba(15,23,42,0.08);--gradient:linear-gradient(135deg,#059669 0%,#6ee7b7 100%);}
.bf-workbench{margin:0 0 2.5rem;padding:0;}
.bf-viewport{position:relative;border-radius:16px;overflow:hidden;background:linear-gradient(165deg,var(--surface-muted) 0%,var(--surface) 55%,var(--surface-muted) 100%);border:1px solid var(--border);box-shadow:var(--shadow-soft);min-height:min(58vh,520px);}
.bf-canvas-wrap{position:relative;width:100%;display:block;line-height:0;}
#bf-canvas{display:block;width:100%;height:auto;touch-action:none;-webkit-tap-highlight-color:transparent;}
.bf-viewport-badge{position:absolute;top:12px;left:12px;z-index:2;font-size:11px;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-muted);background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(8px);padding:6px 10px;border-radius:999px;border:1px solid var(--border);}
.bf-dock{margin-top:14px;display:flex;flex-direction:column;gap:12px;}
.bf-dock-primary{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.bf-btn{appearance:none;border:none;border-radius:12px;padding:14px 22px;font-size:15px;font-weight:600;cursor:pointer;transition:transform 0.15s ease,box-shadow 0.15s ease,background 0.15s ease;min-height:48px;}
.bf-btn:active{transform:scale(0.98);}
.bf-btn-run{background:var(--primary);color:#fff;box-shadow:0 4px 14px color-mix(in srgb,var(--primary) 35%,transparent);}
.bf-btn-run:hover{background:var(--primary-dark);}
.bf-btn-run.bf-running{background:color-mix(in srgb,var(--primary) 75%,#333);}
.bf-btn-ghost{background:var(--surface);color:var(--text-main);border:1px solid var(--border);}
.bf-btn-ghost:hover{background:var(--surface-muted);}
.bf-chip-row{display:flex;flex-wrap:nowrap;gap:8px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch;scrollbar-width:thin;}
.bf-chip-row::-webkit-scrollbar{height:4px;}
.bf-chip-row::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.bf-chip{flex:0 0 auto;padding:10px 16px;border-radius:999px;font-size:13px;font-weight:600;border:1px solid var(--border);background:var(--surface);color:var(--text-muted);cursor:pointer;transition:background 0.15s ease,color 0.15s ease,border-color 0.15s ease;}
.bf-chip[aria-pressed="true"],.bf-chip.bf-chip-active{background:color-mix(in srgb,var(--primary) 12%,var(--surface));color:var(--primary);border-color:color-mix(in srgb,var(--primary) 40%,var(--border));}
.bf-details{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;}
.bf-details summary{cursor:pointer;padding:16px 18px;font-weight:600;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.bf-details summary::-webkit-details-marker{display:none;}
.bf-details summary::after{content:"";width:8px;height:8px;border-right:2px solid var(--text-muted);border-bottom:2px solid var(--text-muted);transform:rotate(45deg);transition:transform 0.2s ease;}
.bf-details[open] summary::after{transform:rotate(-135deg);}
.bf-controls-grid{display:grid;grid-template-columns:1fr;gap:16px;padding:0 18px 18px;}
@media (min-width:640px){.bf-controls-grid{grid-template-columns:repeat(2,1fr);}}
.bf-field{display:flex;flex-direction:column;gap:6px;}
.bf-field label{font-size:13px;font-weight:600;color:var(--text-muted);}
.bf-field input[type="number"],.bf-field select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface-muted);color:var(--text-main);font-size:15px;min-height:48px;}
.bf-field input[type="range"]{width:100%;accent-color:var(--primary);min-height:32px;}
.bf-meter{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:4px;}
@media (min-width:640px){.bf-meter{grid-template-columns:repeat(3,1fr);}}
.bf-meter dt{font-size:11px;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-muted);margin:0;}
.bf-meter dd{margin:4px 0 0;font-size:18px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--text-main);}
.bf-prose-block{margin-bottom:2.75rem;}
.bf-prose-block h2{font-size:1.35rem;margin-bottom:0.75rem;}
.bf-prose-block h3{font-size:1.1rem;margin-top:1.25rem;margin-bottom:0.5rem;}
.bf-prose-block p,.bf-prose-block li{color:var(--text-muted);line-height:1.65;}
.bf-prose-block p{margin-bottom:0.9rem;}
.bf-callout{border-left:4px solid var(--primary);padding:16px 18px;margin:0 0 2.5rem;background:color-mix(in srgb,var(--primary) 6%,var(--surface));border-radius:0 12px 12px 0;border:1px solid var(--border);border-left-width:4px;}
.bf-callout p{margin:0;color:var(--text-muted);font-size:15px;line-height:1.6;}
.bf-dl-grid{display:grid;gap:12px;}
@media (min-width:768px){.bf-dl-grid{grid-template-columns:repeat(2,1fr);}}
.bf-dl-grid div{padding:14px 16px;border-radius:12px;background:var(--surface);border:1px solid var(--border);}
.bf-dl-grid dt{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;color:var(--text-muted);margin:0 0 6px;}
.bf-dl-grid dd{margin:0;color:var(--text-main);font-size:14px;line-height:1.55;}
@media (min-width:992px){.bf-workbench{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:start;}.bf-dock{margin-top:0;}.bf-viewport{min-height:480px;}}