.support-card{position:relative;overflow:hidden;width:min(520px,100%);margin:clamp(26px,3.4vw,40px) auto 0;padding:clamp(30px,3vw,40px) clamp(20px,3vw,32px) clamp(22px,3vw,32px);border:1px solid var(--border);border-radius:3px 22px;background:var(--surface-raised);box-shadow:var(--shadow-panel);text-align:center;transition:transform .34s var(--ease-out),box-shadow .34s var(--ease-out),border-color .34s var(--ease-out)}.support-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 30%,var(--border));box-shadow:var(--shadow-float)}.support-card:before{content:"";position:absolute;inset:-1px;z-index:0;pointer-events:none;opacity:0;transform:translate(-60%);background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.28) 45%,rgba(255,255,255,.34) 50%,rgba(255,255,255,.28) 55%,transparent 80%);mix-blend-mode:soft-light;transition:transform 1.9s cubic-bezier(.23,.72,.32,.98),opacity .7s ease}.support-card:hover:before{opacity:1;transform:translate(60%)}.support-card>.bf-spectrum{position:absolute;top:0;left:0;right:0;height:5px;display:flex;overflow:hidden;transform-origin:left center;animation:bfStripDraw .76s var(--ease-out) .18s both}.support-card>.bf-spectrum>span{flex:1}.support-card>.bf-spectrum:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 30%,rgba(255,255,255,.22) 44%,rgba(255,255,255,.4) 50%,rgba(255,255,255,.22) 56%,transparent 70%);transform:translate(-100%);animation:bfStripGlint 8.2s cubic-bezier(.45,0,.25,1) 2.2s infinite}@keyframes bfStripDraw{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes bfStripGlint{0%{transform:translate(-100%)}34%,to{transform:translate(100%)}}.bf-lede{margin:0 0 2px;position:relative;z-index:1;font-family:var(--font-serif);font-style:italic;font-size:clamp(1.02rem,1.4vw,1.14rem);line-height:1.4;color:var(--text)}.bf-lede strong{font-style:normal;color:var(--accent)}.bf-support{position:relative;z-index:1;width:100%;display:flex;flex-direction:column;align-items:center;gap:18px}.bf-toggle{position:relative;display:inline-flex;padding:4px;background:var(--surface-sunken);border:1px solid var(--border);border-radius:var(--radius-pill)}.bf-toggle-glow{position:absolute;top:4px;bottom:4px;left:0;width:0;z-index:0;border-radius:var(--radius-pill);background:var(--accent);box-shadow:0 7px 18px color-mix(in srgb,var(--accent) 36%,transparent);transition:transform .34s cubic-bezier(.34,1.36,.64,1),width .34s cubic-bezier(.34,1.36,.64,1)}.bf-seg{position:relative;z-index:1;border:0;background:transparent;padding:9px 16px;border-radius:var(--radius-pill);font-family:var(--font-sans);font-size:.8rem;font-weight:800;letter-spacing:.01em;color:var(--text-soft);cursor:pointer;white-space:nowrap;transition:color .22s ease}.bf-seg:hover{color:var(--text)}.bf-seg.is-active{color:var(--text-inverse)}.bf-stage{width:100%;perspective:1500px}.bf-stage-inner{transform-origin:center top;transition:transform .22s cubic-bezier(.4,0,.2,1)}.bf-support.is-flipping .bf-stage-inner{transform:rotateX(-90deg)}.bf-panel{display:none}.bf-panel.is-active{display:flex;flex-direction:column;align-items:center}.bf-form{display:flex;gap:10px;width:100%;max-width:430px}.bf-form input{flex:1;min-width:0;min-height:46px;padding:0 17px;font:inherit;font-family:var(--font-sans);font-size:.95rem;color:var(--text);background:var(--surface-raised);border:1px solid var(--border-strong);border-radius:var(--radius-pill);box-shadow:inset 0 1px 2px #1021160f;outline:none;transition:border-color .17s ease,box-shadow .17s ease}.bf-form input::placeholder{color:var(--text-muted);opacity:1}.bf-form input:focus{border-color:var(--accent);box-shadow:inset 0 1px 2px #1021160f,0 0 0 3px color-mix(in srgb,var(--accent) 16%,transparent)}.bf-form button{flex:0 0 auto;min-height:46px;padding:0 22px;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-sans);font-size:.9rem;font-weight:800;color:var(--text-inverse);background:var(--accent);border:1px solid var(--accent);border-radius:var(--radius-pill);box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 24%,transparent),inset 0 1px #ffffff1f;cursor:pointer;white-space:nowrap;transition:transform .16s ease,filter .16s ease}.bf-form button:hover{transform:translateY(-1px);filter:brightness(1.08)}.bf-form.is-busy button{opacity:.6;cursor:progress}.bf-cap{margin:12px 0 0;font-family:var(--font-sans);font-size:.78rem;line-height:1.5;color:var(--text-muted);text-align:center;max-width:380px}.bf-cap.success,.bf-cap.error{color:var(--accent);font-weight:700}.bf-support .bf-oneoff{display:grid;gap:9px;width:100%;max-width:430px;margin:0;justify-items:center}.bf-support .bf-oneoff-row,.bf-support .oneoff-amounts{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}.bf-support .oneoff-chip{min-height:40px;padding:0 16px;font:inherit;font-family:var(--font-sans);font-weight:800;color:var(--ink);background:var(--paper);border:1px solid var(--rule-strong);border-radius:var(--radius-pill);cursor:pointer;transition:color .15s ease,background .15s ease,border-color .15s ease}.bf-support .oneoff-chip:hover{border-color:var(--accent)}.bf-support .oneoff-chip.is-active{color:var(--paper-soft);background:var(--ink);border-color:var(--ink)}.bf-support .oneoff-custom{display:inline-flex;align-items:center;gap:1px;padding-left:12px;background:var(--paper);border:1px solid var(--rule-strong);border-radius:var(--radius-pill)}.bf-support .oneoff-custom:focus-within{border-color:var(--accent)}.bf-support .oneoff-cur{color:var(--muted);font-weight:700}.bf-support .oneoff-custom input{width:74px;min-height:38px;padding:0 12px 0 3px;border:0;background:transparent;font:inherit;font-family:var(--font-sans);font-weight:700;color:var(--ink);outline:none;-moz-appearance:textfield;appearance:textfield}.bf-support .oneoff-custom input::placeholder{color:var(--muted);font-weight:600}.bf-support .oneoff-custom input::-webkit-outer-spin-button,.bf-support .oneoff-custom input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.bf-support .oneoff-go{min-height:44px;padding:0 24px;font:inherit;font-family:var(--font-sans);font-weight:800;color:var(--text-inverse);background:var(--accent);border:1px solid var(--accent);border-radius:var(--radius-pill);cursor:pointer;transition:transform .16s ease,filter .16s ease}.bf-support .oneoff-go:hover{transform:translateY(-1px);filter:brightness(1.06)}.bf-support .oneoff-go:disabled{opacity:.6;cursor:progress}@media(max-width:560px){.bf-form{flex-direction:column;gap:12px}.bf-toggle{width:100%}.bf-seg{flex:1;padding-inline:8px}.bf-support .bf-oneoff-row{flex-direction:column;align-items:stretch}}@media(prefers-reduced-motion:reduce){.bf-toggle-glow,.bf-stage-inner,.support-card,.support-card:before{transition:none}.support-card>.bf-spectrum,.support-card>.bf-spectrum:after{animation:none}.support-card:before{display:none}.support-card:hover{transform:none}}