.calculator{margin:1.5rem 0;padding:1.4rem;border:1px solid var(--line);border-radius:1rem;background:var(--white);box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-field,.form-row{display:flex;flex-direction:column;gap:.35rem}
.form-field label,.form-row label{font-weight:750}
.field-hint{min-height:2.4em;color:var(--muted);font-size:.84rem;line-height:1.4}
.form-field input,.form-row select{width:100%;min-height:46px;padding:.7rem .75rem;border:1px solid #aebfc4;border-radius:.55rem;background:#fff;color:var(--ink);font:inherit}
.form-field input:focus,.form-row select:focus{outline:3px solid #9be1d1;outline-offset:2px}
.form-row{max-width:320px;margin-bottom:1.1rem}
.calc-button{margin-top:1.2rem;border:0;cursor:pointer;font:inherit}
.calc-error{padding:.8rem;border-left:4px solid #b62e2e;background:#fff0ef;color:#741e1e}
.calc-results{margin:1.6rem 0;padding:1.4rem;border:1px solid #c8e6dd;border-radius:1rem;background:var(--mint)}
.calc-results h2{margin:.2rem 0 1rem;font-size:1.55rem}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.result-grid>div{padding:.85rem;border:1px solid #c7ddd6;border-radius:.65rem;background:#fff;display:flex;flex-direction:column;gap:.35rem}
.result-grid span{font-size:.85rem;color:var(--muted)}
.result-grid strong{font-size:1.05rem}
.tool-notes{margin:2.4rem 0;padding-top:1.2rem;border-top:1px solid var(--line)}
.tool-notes h2{font-size:1.4rem}
@media(max-width:650px){.form-grid,.result-grid{grid-template-columns:1fr}.calculator{padding:1rem}.field-hint{min-height:0}}