@keyframes fbg-mark-pulse{0%,to{transform:scaleY(1)}50%{transform:scaleY(.55)}}.fbg{--bg:#f5f6f9;--bg-alt:#eceef3;--card:#ffffff;--card-hover:#f2f4f8;--border:#dfe3ea;--text:#171a21;--text-dim:#565e6f;--text-faint:#838ba0;--main-axis:#2f5fd6;--main-axis-soft:#2f5fd61a;--cross-axis:#b4720a;--cross-axis-soft:#b4720a1f;--accent:#6d4de0;--success:#34d399;--danger:#d1483f;--danger-soft:#d1483f1a;--radius:12px;--radius-sm:8px;--shadow:0 10px 24px rgba(30, 34, 48, 0.1);--shadow-sm:0 2px 8px rgba(30, 34, 48, 0.08);--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-7:2rem;--space-8:2.5rem;--border-w:1px;--border-default:var(--border-w) solid var(--border);color-scheme:light;color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased;width:100%!important}.fbg h1,.fbg h2,.fbg h3{font-weight:600;letter-spacing:-.01em;margin:0}.fbg p{margin:0}.fbg code{font-size:.9em}.fbg-visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.fbg [tabindex]:focus-visible,.fbg a:focus-visible,.fbg button:focus-visible,.fbg input:focus-visible,.fbg select:focus-visible{outline:2px solid var(--main-axis);outline-offset:2px;border-radius:4px}.fbg-header{border-bottom:var(--border-default);background:linear-gradient(180deg,var(--bg-alt),var(--bg));padding:2.25rem 1.5rem 1.75rem}.fbg-header__inner{max-width:1240px;margin:0 auto}.fbg-brand{display:flex;align-items:center;gap:.9rem}.fbg-brand__mark{display:grid;grid-template-columns:repeat(3,8px);gap:4px;padding:8px;border-radius:var(--radius-sm);background:var(--card);border:var(--border-default)}.fbg-brand__mark i{width:8px;height:20px;border-radius:3px;background:var(--main-axis);animation:fbg-mark-pulse 3s ease-in-out infinite}.fbg-brand__mark i:nth-child(2){background:var(--accent);height:14px;align-self:end;animation-delay:.2s}.fbg-brand__mark i:nth-child(3){background:var(--cross-axis);height:20px;animation-delay:.4s}.fbg-eyebrow{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--main-axis);margin:0 0 .15rem}.fbg-title{font-size:clamp(1.5rem,1.1rem + 1.6vw,2.15rem)}.fbg-subtitle{max-width:62ch;color:var(--text-dim);margin-top:.85rem;font-size:1rem}.fbg-btn{font-size:.85rem;font-weight:600;padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);border:var(--border-w) solid #fff0;background:var(--main-axis);color:#fff;cursor:pointer;transition:transform .12s ease,background .15s ease,border-color .15s ease;display:inline-flex;align-items:center;gap:.4rem;white-space:nowrap}.fbg-btn:hover{transform:translateY(-1px)}.fbg-btn:active{transform:translateY(0)}.fbg-btn--sm{padding:var(--space-2) var(--space-3);font-size:.8rem}.fbg-btn--ghost{background:#e3e3e3;color:var(--text);border-color:var(--border)}.fbg-btn--ghost:hover{background:var(--card-hover)}.fbg-btn--danger{background:var(--danger-soft);color:var(--danger);border-color:#fff0}.fbg-btn--danger:hover{background:var(--danger);color:#fff}.fbg-btn-row{display:flex;gap:var(--space-2);margin-top:var(--space-4)}.fbg-app{max-width:1240px;margin:0 auto;padding:var(--space-6) var(--space-6) var(--space-8);display:grid;grid-template-columns:minmax(300px,40%) minmax(0,60%);gap:var(--space-6);align-items:start;width:100%!important}.fbg-panel{background:var(--card);border:var(--border-default);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.fbg-controls{padding:var(--space-5);position:sticky;top:var(--space-4);max-height:calc(100vh - 2rem);overflow-y:auto}.fbg-fieldset legend,.fbg-panel__title{display:flex;align-items:center;gap:var(--space-2)}.fbg-panel__title{font-size:.95rem;margin-bottom:var(--space-4)!important;padding-bottom:var(--space-3);border-bottom:var(--border-default)}.fbg-presets{margin-bottom:var(--space-6)}.fbg-presets__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-2)}.fbg-preset{font-size:.78rem;font-weight:600;text-align:left;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);border:var(--border-default);background:var(--bg-alt);color:var(--text);cursor:pointer;transition:border-color .15s ease,background .15s ease}.fbg-preset:hover{border-color:var(--main-axis);background:var(--main-axis-soft)}.fbg-fieldset{border:0;padding:0;margin:0 0 var(--space-5)}.fbg-fieldset legend{font-size:.8rem;font-weight:600;color:var(--text-dim);padding:0;margin-bottom:var(--space-2)}.fbg-axis-chip{font-size:.65rem;font-weight:700;padding:.12rem var(--space-2);border-radius:999px;text-transform:uppercase;letter-spacing:.03em}.fbg-axis-chip--main{background:var(--main-axis-soft);color:var(--main-axis)}.fbg-axis-chip--cross{background:var(--cross-axis-soft);color:var(--cross-axis)}.fbg-segmented{display:flex;flex-wrap:wrap;gap:var(--space-2)}.fbg-segmented__btn{font-size:.78rem;font-weight:600;padding:.4rem var(--space-3);border-radius:var(--radius-sm);border:var(--border-default);background:var(--bg-alt);color:var(--text-dim);cursor:pointer;transition:all .15s ease}.fbg-segmented__btn:hover{color:var(--text)}.fbg-segmented__btn.is-active{background:var(--main-axis);border-color:var(--main-axis);color:#fff}.fbg-field input,.fbg-field select,.fbg-select,input[type=text].fbg-input{width:100%;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);border:var(--border-default);background:var(--bg-alt);color:var(--text);font-size:.85rem}.fbg-field input[type=color]{padding:.25rem;height:2.4rem;cursor:pointer}.fbg-explain,.fbg-note{margin-top:var(--space-2)}.fbg-explain{font-size:.78rem;color:var(--text-faint);line-height:1.5}.fbg-note{font-size:.75rem;color:var(--cross-axis);padding:var(--space-2) var(--space-3);background:var(--cross-axis-soft);border-radius:var(--radius-sm)}.fbg-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-3);margin-bottom:var(--space-5)}.fbg-field{display:flex;flex-direction:column;gap:var(--space-1);font-size:.78rem;font-weight:600;color:var(--text-dim)}.fbg-field--full{grid-column:1/-1}.fbg-item-panel{margin-top:var(--space-6);padding-top:var(--space-6);border-top:1px dashed var(--border)}.fbg-workspace{padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-4)}.fbg-toolbar{display:flex;flex-wrap:wrap;gap:var(--space-3);justify-content:space-between;align-items:center}.fbg-toolbar__group{display:flex;gap:var(--space-2);flex-wrap:wrap}.fbg-axis span,.fbg-device{border:var(--border-default)}.fbg-device{font-size:.78rem;font-weight:600;padding:.45rem var(--space-3);border-radius:var(--radius-sm);background:var(--bg-alt);color:var(--text-dim);cursor:pointer}.fbg-device.is-active{background:var(--cross-axis);border-color:var(--cross-axis);color:#14161c}.fbg-stage-wrap{background:repeating-conic-gradient(var(--bg-alt) 0% 25%,var(--bg) 0% 50%) 0 0/20px 20px;border:var(--border-default);border-radius:var(--radius);padding:var(--space-8) var(--space-6);display:flex;justify-content:center;overflow-x:auto}.fbg-stage{position:relative;width:100%;max-width:100%;transition:max-width .25s ease}.fbg-stage[data-device=tablet]{max-width:620px}.fbg-stage[data-device=mobile]{max-width:360px}.fbg-axis{position:absolute;display:flex;align-items:center;gap:.35rem;font-size:.68rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;pointer-events:none}.fbg-axis span{padding:.15rem var(--space-2);border-radius:999px;background:var(--card)}.fbg-axis::after,.fbg-axis::before{content:'';display:block}.fbg-axis--main{top:-1.9rem;left:0;right:0;color:var(--main-axis);border-top:2px dashed var(--main-axis)}.fbg-axis--main::after{position:absolute;right:-2px;top:-5px;width:0;height:0;border-top:4px solid #fff0;border-bottom:4px solid #fff0;border-left:6px solid var(--main-axis)}.fbg-axis--cross{top:0;bottom:0;left:-2.2rem;color:var(--cross-axis);flex-direction:column;border-left:2px dashed var(--cross-axis)}.fbg-axis--cross span,.fbg-stage[data-direction=column-reverse] .fbg-axis--main span,.fbg-stage[data-direction=column] .fbg-axis--main span{writing-mode:vertical-rl}.fbg-axis--cross::after{position:absolute;bottom:-2px;left:-5px;width:0;height:0;border-left:4px solid #fff0;border-right:4px solid #fff0;border-top:6px solid var(--cross-axis)}.fbg-stage[data-direction=column-reverse] .fbg-axis--main,.fbg-stage[data-direction=column] .fbg-axis--main{top:0;bottom:0;left:-2.2rem;right:auto;flex-direction:column;border-top:none;border-left:2px dashed var(--main-axis)}.fbg-stage[data-direction=column-reverse] .fbg-axis--cross,.fbg-stage[data-direction=column] .fbg-axis--cross{top:-1.9rem;right:0;bottom:auto;left:0;flex-direction:row;border-left:none;border-top:2px dashed var(--cross-axis)}.fbg-stage[data-direction=column-reverse] .fbg-axis--cross span,.fbg-stage[data-direction=column] .fbg-axis--cross span{writing-mode:initial}.fbg-container{display:flex;min-height:220px;transition:all .2s ease}.fbg-item,.fbg-item__remove{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center}.fbg-item{position:relative;font-weight:600;font-size:.85rem;cursor:grab;border:2px solid #fff0;transition:box-shadow .15s ease,transform .15s ease;user-select:none}.fbg-item:hover{box-shadow:0 0 0 2px var(--main-axis-soft)}.fbg-item.is-selected{border-color:var(--main-axis);box-shadow:0 0 0 3px var(--main-axis-soft)}.fbg-item.is-dragging{opacity:.4}.fbg-item[draggable=true]:active{cursor:grabbing}.fbg-item__remove{position:absolute;top:-8px;right:-8px;z-index:2;width:20px;height:20px;border-radius:999px;background:var(--danger);color:#fff;border:2px solid var(--card);font-size:.7rem;line-height:1;font-weight:700;cursor:pointer;padding:0;box-shadow:var(--shadow-sm)}.fbg-item__remove:hover{background:#b8342b}.fbg-tabs{display:flex;flex-wrap:wrap;gap:var(--space-1);border-bottom:var(--border-default)}.fbg-tab{font-size:.8rem;font-weight:600;padding:var(--space-2) var(--space-3);background:0 0;border:0;color:var(--text-faint);cursor:pointer;border-bottom:2px solid #fff0;margin-bottom:-1px}.fbg-tab:hover{color:var(--text)}.fbg-tab.is-active{color:var(--main-axis);border-color:var(--main-axis)}.fbg-code__panel{position:relative;margin-top:var(--space-3)}.fbg-code__actions{position:absolute;top:var(--space-2);right:var(--space-2);display:flex;gap:var(--space-1);z-index:1}.fbg-code__pre,.fbg-toast{border-radius:var(--radius-sm)}.fbg-code__pre{margin:0;background:var(--bg-alt);border:var(--border-default);padding:var(--space-4);max-height:320px;overflow:auto;font-size:.82rem;line-height:1.6;color:var(--text)}.fbg-toast{position:fixed;bottom:1.25rem;right:1.25rem;z-index:40;background:var(--success);color:#05261a;font-weight:700;font-size:.85rem;padding:var(--space-2) var(--space-4);box-shadow:var(--shadow);opacity:0;transform:translateY(10px);pointer-events:none;transition:opacity .2s ease,transform .2s ease}.fbg-toast.is-visible{opacity:1;transform:translateY(0)}.fbg-learn{max-width:1000px;margin:var(--space-4) auto 0;padding:var(--space-7) var(--space-6) var(--space-8);display:flex;flex-direction:column;gap:var(--space-7)}.fbg-learn__section h2{font-size:1.25rem;margin-bottom:var(--space-3)}.fbg-learn__section h3{font-size:.95rem;margin-bottom:.35rem}.fbg-learn__section p,.fbg-list li{color:var(--text-dim);font-size:.92rem}.fbg-list{list-style:none;padding:0;margin:0;display:grid;gap:.55rem}.fbg-list li{padding-left:1.3rem;position:relative}.fbg-list li::before{content:'';position:absolute;left:0;top:.5em;width:6px;height:6px;border-radius:999px;background:var(--main-axis)}.fbg-example-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem}.fbg-example-card{border:var(--border-default);border-radius:var(--radius-sm);padding:var(--space-4);background:var(--card)}.fbg-faq{display:flex;flex-direction:column;gap:var(--space-2)}.fbg-faq__item,.fbg-related a{border:var(--border-default);background:var(--card)}.fbg-faq__item{border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4)}.fbg-faq__item summary{cursor:pointer;font-weight:600;font-size:.92rem}.fbg-faq__item p{margin-top:var(--space-2);font-size:.88rem}.fbg-related{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:var(--space-2)}.fbg-related a{display:inline-block;font-size:.82rem;font-weight:600;color:var(--text);padding:var(--space-2) var(--space-4);border-radius:999px;text-decoration:none}.fbg-related a:hover{border-color:var(--main-axis);color:var(--main-axis)}.fbg-footer{text-align:center;padding:var(--space-6);border-top:var(--border-default);color:var(--text-faint);font-size:.8rem}@media (prefers-reduced-motion:reduce){.fbg-brand__mark i{animation:none}}@media (max-width:980px){.fbg-app{grid-template-columns:1fr}.fbg-controls{position:static;max-height:none}}@media (max-width:640px){.fbg-grid-2,.fbg-presets__grid{grid-template-columns:1fr}.fbg-header{padding:1.5rem 1rem}.fbg-app{padding:1.25rem 1rem 2rem}}