.card,.panel{border-radius:4px}*,::after,::before{box-sizing:border-box}:root{--bg:#f7f7f7;--card-bg:#ffffff;--border:#dddddd;--text-main:#222222;--text-muted:#666666;--accent:#005bbb;--accent-soft:#e4f0ff}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text-main)}.panel h2,h1{margin:0 0 4px}.app{max-width:960px;margin:0 auto;padding:16px}.header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:16px 12px 8px}h1{font-size:1.5rem}.subtitle{margin:0;font-size:.9rem;color:var(--text-muted)}.last-updated,label{font-size:.85rem;color:var(--text-muted)}.last-updated{display:flex;gap:4px}.last-updated .label{font-weight:500}.main{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px}.panel{background:var(--card-bg);border:1px solid var(--border);padding:16px}.panel h2{font-size:1.1rem}.refresh-info{margin:0 0 12px;font-size:.8rem;color:var(--text-muted)}.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}.card{border:1px solid var(--border);padding:12px;background:#fafafa}.result,input,select{padding:6px 8px;border-radius:4px}.card h3{margin:0 0 6px;font-size:.95rem;color:var(--text-muted)}.price{margin:0;font-size:1.4rem;font-weight:600}.status{margin:10px 0 0;font-size:.8rem;color:var(--text-muted)}.converter-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:12px;margin:10px 0 12px}.converter-group{display:flex;flex-direction:column;gap:4px}input,select{border:1px solid var(--border);font-size:.95rem;outline:0}input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent-soft)}.result{min-height:34px;border:1px dashed var(--border);font-size:1rem;display:flex;align-items:center}.btn{display:inline-flex;padding:8px 14px;border-radius:4px;border:1px solid var(--accent);background:var(--accent);color:#fff;font-size:.9rem;cursor:pointer}.footer,.hint{font-size:.75rem;color:var(--text-muted)}.btn:hover{background:#004999;border-color:#004999}.btn:disabled{background:#b9c9e2;border-color:#b9c9e2;cursor:default}.hint{margin:8px 0 0}.footer{margin-top:16px;padding:12px 4px 4px;border-top:1px solid var(--border)}@media (max-width:768px){.converter-grid,.main{grid-template-columns:1fr}.header{align-items:flex-start}}