/* ZeroFee Tools - roman-numeral-converter styles */
*{box-sizing:border-box;margin:0;padding:0}
:root{--a:#b45309;--b:#92400e;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--bg:#faf7f2;--card:#fff;--ok:#16a34a;--bad:#dc2626}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
#siteHeader{background:linear-gradient(135deg,var(--a),var(--b));color:#fff;padding:26px 0 8px}
.header-inner{display:flex;align-items:center}
.brand{display:flex;gap:14px;align-items:center}
.hub-link{color:#fff;text-decoration:none;font-size:.85rem;opacity:.85;display:block;margin-bottom:2px}
.hub-link:hover{text-decoration:underline;opacity:1}
.brand-name{font-size:1.7rem;line-height:1.15}
.brand-tag{opacity:.9;font-size:.9rem}
#main{padding:30px 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin:18px 0}
.card h2{font-size:1.15rem;margin-bottom:12px}
label{display:block;font-size:.9rem;font-weight:600;margin-bottom:12px}
input[type=text]{display:block;width:100%;margin-top:6px;padding:10px 12px;font-size:1.05rem;border:1px solid var(--line);border-radius:8px;font-family:inherit;background:#fff;color:var(--ink)}
.btn{display:inline-block;background:var(--a);color:#fff;border:none;border-radius:8px;padding:10px 18px;font-size:.95rem;font-weight:600;cursor:pointer;margin:4px 6px 4px 0}
.btn:hover{filter:brightness(.92)}
.btn.secondary{background:#fff;color:var(--a);border:1px solid var(--a)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:700px){.grid2{grid-template-columns:1fr}}
.roman-out{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:18px;margin:14px 0;font-size:2rem;font-weight:700;letter-spacing:.15em;text-align:center;min-height:76px;font-family:Georgia,"Times New Roman",serif}
.chart{display:grid;grid-template-columns:repeat(auto-fit,minmax(90px,1fr));gap:8px;margin-top:12px}
.chart div{background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:8px;text-align:center}
.chart .r{font-family:Georgia,serif;font-weight:700;font-size:1.15rem;color:var(--a)}
.chart .n{font-size:.85rem;color:var(--muted)}
.muted{color:var(--muted)}.small{font-size:.85rem}
.err{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:10px;padding:12px 16px;margin:12px 0}
.ok-note{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534;border-radius:10px;padding:12px 16px;margin:12px 0}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#0f172a;color:#fff;padding:10px 18px;border-radius:999px;font-size:.9rem;opacity:0;pointer-events:none;transition:.25s;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}