:root{--brand:#4f46e5;--brand-600:#4338ca;--brand-50:#eef2ff;--ink:#111114;--ink-2:#3a3a42;--muted:#6b6b78;--line:#e6e6ec;--surface:#ffffff;--surface-2:#f7f7fa;--paper:#fbfbfd;--danger:#c1392b;--danger-bg:#fdecea;--ok:#1f8a4c;--font-sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;--radius:10px;--radius-sm:6px;--shadow:0 1px 2px rgba(17,17,20,0.04),0 4px 16px rgba(17,17,20,0.06)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:var(--font-sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;line-height:1.5}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0}.fbq-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem .95rem;font:inherit;font-weight:550;border-radius:var(--radius-sm);border:1px solid transparent;background:var(--brand);color:#fff;cursor:pointer;text-decoration:none;transition:background .12s ease,border-color .12s ease}.fbq-btn:hover{background:var(--brand-600);text-decoration:none}.fbq-btn--ghost{background:transparent;color:var(--ink-2);border-color:var(--line)}.fbq-btn--ghost:hover{background:var(--surface-2)}.fbq-btn--danger{background:transparent;color:var(--danger);border-color:var(--line)}.fbq-btn--danger:hover{background:var(--danger-bg)}.fbq-btn[disabled]{opacity:.5;cursor:not-allowed}.fbq-card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.fbq-card,.fbq-input{background:var(--surface)}.fbq-input{font:inherit;padding:.5rem .65rem;border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--ink)}.fbq-input:focus{outline:2px solid var(--brand-50);border-color:var(--brand)}.fbq-muted{color:var(--muted)}.fbq-mono{font-family:var(--font-mono);font-size:.85em}.fbq-badge{display:inline-block;padding:.1rem .5rem;font-size:.75rem;font-weight:600;border-radius:999px;background:var(--brand-50);color:var(--brand-600)}