.equation{margin:22px 0;padding:22px;border:1px solid #cbd7e1;background:#f4f8fb;font-size:clamp(1.05rem,2.6vw,1.45rem);font-weight:800;letter-spacing:-.02em;overflow-wrap:anywhere}.equation small{display:block;margin-top:8px;font-size:.78rem;font-weight:500;letter-spacing:0;color:#526675}.calc{margin:24px 0;padding:clamp(20px,4vw,34px);border-radius:18px;background:#0d1d2b;color:#fff}.calc h2,.calc h3{color:#fff}.calc p{color:#cbd8e2}.calc-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:20px 0}.calc label{display:grid;gap:7px;font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#b7c7d3}.calc input,.calc select{width:100%;min-height:48px;border:1px solid #617483;border-radius:8px;background:#fff;color:#10202d;padding:10px 12px;font:inherit}.calc button{min-height:48px;border:0;border-radius:999px;background:#28a8e0;color:#071723;padding:0 22px;font-weight:900;cursor:pointer}.calc button:hover,.calc button:focus-visible{background:#78d3f7}.calc-output{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;margin-top:22px;background:#49606f;border:1px solid #49606f}.calc-output div{min-height:92px;background:#132c3d;padding:17px}.calc-output span{display:block;color:#a9bcc9;font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.calc-output strong{display:block;margin-top:8px;color:#fff;font-size:1.18rem;overflow-wrap:anywhere}.formula-table{width:100%;border-collapse:collapse;margin:18px 0 28px}.formula-table th,.formula-table td{padding:13px 14px;border-bottom:1px solid #d8e1e8;text-align:left;vertical-align:top}.formula-table th{background:#eaf1f5;color:#193142;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase}.formula-table td:first-child{font-weight:800}.unit-table{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.unit-row{padding:16px;border:1px solid #d5e0e7;background:#fff}.unit-row strong{display:block;color:#142b3b}.unit-row span{display:block;margin-top:5px;color:#587080;font-size:.9rem}.safety-band{margin:24px 0;padding:20px 22px;border-left:5px solid #e88b26;background:#fff7ed}.safety-band strong{color:#7d3f00}.source-note{font-size:.84rem;color:#5a6f7d}.mini-nav{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0 30px}.mini-nav a{padding:8px 12px;border:1px solid #cbd8e0;border-radius:999px;background:#fff;font-weight:750;font-size:.84rem}.symbol{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#0b769f}.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.compare>div{padding:24px;border:1px solid #d5e0e7;background:#fff}.compare h3{margin-top:0}@media(max-width:860px){.calc-grid,.calc-output,.unit-table{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.calc-grid,.calc-output,.unit-table,.compare{grid-template-columns:1fr}.formula-table{display:block;overflow-x:auto}}