.dcalc{--c-accent:#067957;--c-accent-h:#055f45;--c-soft:#ecfbf5;--c-ink:#172033;--c-muted:#5b687e;--c-line:#dfe5ec;--c-bg:#f8fafc;--c-bad:#b42318;
box-sizing:border-box;max-width:880px;margin:0 auto 1.5em;padding:16px;background:#fff;border:1px solid var(--c-line);border-radius:14px;color:var(--c-ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;box-shadow:0 1px 3px rgba(23,32,51,.06)}
.dcalc *,.dcalc *::before,.dcalc *::after{box-sizing:border-box}
.dcalc .dcalc-title{margin:0 0 4px;font-size:1.45em;line-height:1.2;color:var(--c-ink)}
.dcalc .dcalc-intro{margin:0 0 12px;color:var(--c-muted)}
.dcalc-tabs{border:0;margin:0 0 12px;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.dcalc-tabs legend{font-weight:700;margin-bottom:6px;padding:0;width:100%}
.dcalc-tabs label{position:relative;display:inline-flex;align-items:center;min-height:40px;padding:6px 14px;border:1px solid var(--c-line);border-radius:999px;background:#fff;font-weight:600;font-size:.93em;cursor:pointer}
.dcalc-tabs input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.dcalc-tabs label.is-on{background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.dcalc-tabs label:has(input:checked){background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.dcalc-tabs label:focus-within{outline:3px solid var(--c-accent);outline-offset:2px}
.dcalc-panel{background:var(--c-bg);border:1px solid var(--c-line);border-radius:12px;padding:14px}
.dcalc-panel[hidden]{display:none}
.dcalc-help{margin:0 0 10px;color:var(--c-muted);font-size:.95em}
.dcalc-grid,.dcalc-list{display:grid;grid-template-columns:1fr;gap:10px;margin-bottom:10px}
.dcalc-field label{display:block;font-weight:700;margin-bottom:4px;font-size:.93em}
.dcalc-field input,.dcalc-field select{display:block;width:100%;font:inherit;min-height:44px;padding:6px 10px;border:1px solid #c9d3de;border-radius:8px;background:#fff;color:var(--c-ink)}
.dcalc-field input[type=number]{font-weight:700;font-variant-numeric:tabular-nums}
.dcalc-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.dcalc .dcalc-btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 16px;border:1px solid var(--c-line);border-radius:10px;background:#fff;color:var(--c-ink);font:inherit;font-weight:600;cursor:pointer}
.dcalc .dcalc-btn:hover{border-color:var(--c-accent);color:var(--c-accent)}
.dcalc .dcalc-sm{min-height:40px;font-size:.92em}
.dcalc .dcalc-primary{min-width:160px;background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.dcalc .dcalc-primary:hover{background:var(--c-accent-h);color:#fff}
.dcalc .dcalc-btn:focus-visible,.dcalc input:focus-visible,.dcalc select:focus-visible{outline:3px solid var(--c-accent);outline-offset:2px}
.dcalc-out{margin-top:12px;padding:14px;border-radius:12px;background:var(--c-soft);border:1px solid #cdeee0}
.dcalc-result{margin:0 0 6px;font-size:1.3em;font-weight:800;font-variant-numeric:tabular-nums}
.dcalc-result.is-error{color:var(--c-bad);font-size:1em}
.dcalc-formula{margin:0 0 10px;font-size:.95em;color:var(--c-ink);word-break:break-word}
.dcalc-small{font-size:.85em;color:var(--c-muted);margin:0 0 10px}
@media (min-width:640px){.dcalc{padding:22px}.dcalc-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dcalc-list{grid-template-columns:repeat(3,minmax(0,1fr))}}