.tb131-hero{background:linear-gradient(135deg,#eef7ff,#f7fbff);border-bottom:1px solid #d9ecff}.tb131-intro{max-width:980px}.tb131-hub-grid,.tb131-guidance-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin:1.5rem 0}.tb131-hub-card,.tb131-guidance-grid article,.tb131-converter-card,.tb131-result-card{background:#fff;border:1px solid #dbeafe;border-radius:18px;padding:1.1rem;box-shadow:0 10px 28px rgba(15,23,42,.06)}.tb131-hub-card span,.tb131-eyebrow{display:inline-block;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:#1d4ed8;font-weight:700}.tb131-hub-card h3{margin:.45rem 0}.tb131-hub-card small{color:#475569}.tb131-tool-shell{max-width:1100px;margin:0 auto;padding:1.5rem}.tb131-tool-grid{display:grid;grid-template-columns:minmax(260px,420px) 1fr;gap:1rem;align-items:stretch}.tb131-converter-card label{display:block;font-weight:700;margin-bottom:.5rem}.tb131-converter-card input{width:100%;font-size:1.1rem;padding:.85rem;border:1px solid #cbd5e1;border-radius:12px}.tb131-unit-row{display:flex;justify-content:space-between;gap:1rem;margin:1rem 0;color:#334155}.tb131-converter-card button{border:0;border-radius:999px;background:#2457ff;color:#fff;padding:.85rem 1.2rem;font-weight:800;cursor:pointer}.tb131-result-card h2{font-size:clamp(1.6rem,4vw,2.4rem);margin:.4rem 0}.tb131-result-card small{color:#64748b}@media(max-width:760px){.tb131-tool-grid{grid-template-columns:1fr}}