.tb137-hero{background:linear-gradient(135deg,#eef6ff,#f9fbff)}.tb137-wrap{max-width:1180px;margin:0 auto;padding:34px 20px}.tb137-card-grid,.tb137-guidance-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}.tb137-card,.tb137-converter-card,.tb137-result-card,.tb137-guidance-grid article,.tb137-note{background:#fff;border:1px solid #dbe6f3;border-radius:18px;padding:20px;box-shadow:0 12px 30px rgba(20,40,80,.06)}.tb137-card h3{margin:0 0 8px}.tb137-card span,.tb137-eyebrow{display:inline-block;margin-top:10px;font-size:.82rem;font-weight:700;color:#315f9d}.tb137-tool-shell{max-width:1120px;margin:0 auto;padding:32px 20px}.tb137-tool-grid{display:grid;grid-template-columns:minmax(260px,420px) 1fr;gap:22px;align-items:stretch}.tb137-converter-card label{display:block;font-weight:700;margin:12px 0 6px}.tb137-converter-card input{width:100%;padding:12px;border:1px solid #c9d7e8;border-radius:12px;font-size:1rem}.tb137-converter-card button{margin-top:16px;padding:12px 18px;border:0;border-radius:12px;background:#143a66;color:#fff;font-weight:800}.tb137-unit-row{display:flex;gap:12px;justify-content:space-between;margin-top:14px}.tb137-unit-row span{background:#f4f8fd;border-radius:12px;padding:10px 12px}.tb137-result-card h2{font-size:2rem;margin:10px 0}.tb137-result-card small,.tb137-converter-card small{color:#5f6f84}.tb137-guidance-grid{margin-top:22px}@media(max-width:760px){.tb137-tool-grid{grid-template-columns:1fr}.tb137-result-card h2{font-size:1.5rem}}