/* Engineering calculators V1 – isolated styles */
.ec-page,.ec-widget{--ec-ink:#122a3d;--ec-muted:#637688;--ec-brand:#0d9488;--ec-soft:#edf9f7;--ec-line:#dce7ee;--ec-card:#fff;color:var(--ec-ink);font-family:Vazirmatn,Tahoma,sans-serif;line-height:1.8}
.ec-page{background:#f6f9fb;padding:45px 16px 65px;min-height:65vh}
.ec-container{max-width:1160px;margin:auto}
.ec-hub-head{margin:8px auto 28px;text-align:center;max-width:720px}.ec-hub-head h1{font-size:clamp(25px,3vw,34px);font-weight:800;margin:5px 0}.ec-hub-head p,.ec-intro p{color:var(--ec-muted);margin:0}
.ec-kicker{color:#0f766e;letter-spacing:.01em;font-size:13px;font-weight:700}
.ec-breadcrumb{font-size:13px;margin:0 0 18px;color:var(--ec-muted)}.ec-breadcrumb a,.ec-other-link a{color:#0f766e;text-decoration:none}
.ec-tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.ec-tile{display:block;border:1px solid var(--ec-line);border-radius:18px;background:#fff;padding:28px;text-decoration:none;color:var(--ec-ink);box-shadow:0 8px 34px rgba(14,40,63,.04);transition:transform .15s,box-shadow .15s}.ec-tile:hover{transform:translateY(-3px);box-shadow:0 14px 38px rgba(14,40,63,.08);color:var(--ec-ink)}.ec-tile-icon{font-size:30px;color:#0f766e}.ec-tile h2{font-size:21px;margin:8px 0}.ec-tile p{color:var(--ec-muted);font-size:14px}.ec-tile-link{display:inline-block;color:#0f766e;font-weight:700;margin-top:8px}.ec-other-link{margin-top:20px;text-align:center}
.ec-widget{max-width:1160px;margin:0 auto 20px}.ec-intro{margin:0 0 20px}.ec-intro h2{font-weight:800;color:var(--ec-ink);font-size:clamp(23px,2.5vw,31px);margin:4px 0 7px}.ec-intro p{font-size:14px}
.ec-grid{display:grid;grid-template-columns: minmax(290px, .9fr) minmax(300px, 1.1fr);gap:18px;align-items:start}
.ec-panel{background:var(--ec-card);border:1px solid var(--ec-line);box-shadow:0 9px 25px rgba(20,50,70,.04);border-radius:16px;padding:24px;min-width:0}
.ec-panel h3{font-size:17px;font-weight:750;margin:0 0 18px;color:var(--ec-ink)}
.ec-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.ec-fields label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:650;color:#32485a;min-width:0}.ec-fields .ec-full{grid-column:1/-1}
.ec-widget input,.ec-widget select{width:100%;min-width:0;height:44px;padding:9px 12px;border-radius:10px;border:1px solid #cddbe3;background:#fff;box-sizing:border-box;color:#173146;font:inherit;outline:none;font-size:14px}.ec-widget input:focus,.ec-widget select:focus{border-color:#0d9488;box-shadow:0 0 0 3px #0d94881c}.ec-widget select{cursor:pointer}.ec-widget input[type=number]{direction:ltr;text-align:right}
.ec-hint,.ec-footnote{background:#f5f9fa;padding:11px 13px;border-radius:9px;font-size:12px;color:#5b6c7b;margin:17px 0 0}.ec-footnote{margin:15px 0 0;background:transparent;padding:0}
.ec-result{background:linear-gradient(160deg,#ffffff 0%,#fbfefd 100%)}.ec-result-top{display:flex;align-items:start;gap:10px;justify-content:space-between}.ec-live{font-size:11px;color:#087e6e}
.ec-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.ec-result-primary{grid-column:1/-1;display:flex;flex-direction:column;gap:0;background:linear-gradient(115deg,#0e776f,#11445a);color:white;padding:16px 20px;border-radius:14px}.ec-result-primary strong{font-size:clamp(27px,4vw,35px);font-weight:800;line-height:1.4;font-variant-numeric:tabular-nums}.ec-result-primary small{opacity:.9;font-size:12px}
.ec-result-item{border:1px solid #e4edf0;border-radius:12px;background:#fff;padding:10px 13px;display:flex;flex-direction:column;gap:0}.ec-result-item span{font-size:12px;color:#52697c}.ec-result-item b{font-size:20px;line-height:1.65;color:#173c48;overflow-wrap:anywhere}.ec-result-item small{color:#718697;font-size:11px}
.ec-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:17px}.ec-actions button{border:1px solid #0e8276;padding:10px 14px;background:#0f8277;color:#fff;cursor:pointer;border-radius:9px;font:inherit;font-size:12px;font-weight:750}.ec-actions button:hover{filter:brightness(.96)}.ec-actions .ec-secondary{background:white;color:#0f766e}.ec-actions button:focus-visible,.ec-tabs button:focus-visible{outline:3px solid #60a5fa;outline-offset:2px}
.ec-error{background:#fff1f2;border:1px solid #fecdd3;color:#ad1f39;padding:10px;border-radius:8px;font-size:13px;margin-bottom:12px}
.ec-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0 18px;padding:6px;background:#e9f1f5;border-radius:12px;width:fit-content;max-width:100%}.ec-tabs button{font:inherit;border:0;padding:8px 18px;border-radius:8px;background:transparent;color:#526779;cursor:pointer;font-weight:750}.ec-tabs button.is-active{background:#fff;color:#087d72;box-shadow:0 2px 9px #143e4f10}.ec-widget [hidden]{display:none!important}
.ec-notice{margin:12px auto;padding:18px;background:#fff9e9;border-radius:10px;max-width:800px}.ec-widget button:disabled{opacity:.5;cursor:not-allowed}
@media(max-width:720px){.ec-page{padding:25px 10px}.ec-grid,.ec-tiles{grid-template-columns:1fr}.ec-panel{padding:16px}.ec-fields{gap:11px}.ec-actions button{flex:1}.ec-tabs{width:100%;justify-content:space-around}.ec-tabs button{padding:8px 10px}.ec-intro h2{font-size:24px}}
@media(max-width:370px){.ec-fields{grid-template-columns:1fr}.ec-result-item b{font-size:18px}}
@media print{body *{visibility:hidden!important}.ec-widget,.ec-widget *{visibility:visible!important}.ec-widget{position:absolute;top:0;right:0;left:0;width:100%;background:#fff!important}.ec-actions,.ec-tabs,.ec-intro+.ec-tabs,.ec-form{display:none!important}.ec-mpanel[hidden]{display:none!important}.ec-grid{display:block}.ec-result{box-shadow:none!important;border:0!important}.ec-result-primary{color:#000;background:#fff;border:1px solid #777}}