.htg-calc-shell{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;}
.htg-panel{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:26px;}
.htg-panel-title{font-size:0.78rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:#5b6b66;margin-bottom:20px;display:flex;justify-content:space-between;align-items:center;}
.htg-unit-toggle{display:flex;background:var(--bg);border:1px solid var(--border);border-radius:8px;overflow:hidden;}
.htg-unit-toggle button{border:none;background:transparent;padding:6px 14px;font-size:0.78rem;font-weight:700;cursor:pointer;color:var(--dark);}
.htg-unit-toggle button.active{background:var(--primary);color:#fff;}
.htg-field{margin-bottom:16px;}
.htg-field label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:6px;}
.htg-input-row{display:flex;align-items:center;gap:8px;}
.htg-field input, .htg-field select{width:100%;padding:11px 12px;border-radius:8px;border:1px solid var(--border);font-family:'Inter';font-size:0.92rem;background:#fff;}
.htg-field input:focus, .htg-field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,93,80,0.12);}
.htg-unit-suffix{font-size:0.8rem;color:#7a8985;white-space:nowrap;min-width:44px;}
.htg-field-error{font-size:0.78rem;color:#B3462C;margin-top:5px;display:none;}
.htg-field.has-error input{border-color:#B3462C;}
.htg-field.has-error .htg-field-error{display:block;}
.htg-calc-actions{display:flex;gap:10px;margin-top:6px;}
.htg-calc-actions .htg-btn{flex:1;}
.htg-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:8px;font-weight:600;font-size:0.9rem;background:var(--primary);color:#fff;border:none;cursor:pointer;}
.htg-btn-ghost{background:transparent;border:1px solid var(--border);color:var(--dark);}
.htg-result-empty{color:#7a8985;font-size:0.9rem;text-align:center;padding:40px 10px;}
.htg-result-error{color:#B3462C;font-size:0.9rem;text-align:center;padding:40px 10px;background:#FBEDE8;border-radius:8px;}
.htg-result-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border);font-size:0.9rem;}
.htg-result-row:last-of-type{border-bottom:none;}
.htg-result-row .htg-label{color:#5b6b66;}
.htg-result-row .htg-value{font-weight:700;}
.htg-result-highlight{background:var(--light-green);border-radius:10px;padding:16px 18px;margin:14px 0;display:flex;justify-content:space-between;align-items:center;}
.htg-result-highlight .htg-label{font-size:0.82rem;color:#2b4a41;font-weight:600;}
.htg-result-highlight .htg-value{font-family:'Manrope',sans-serif;font-weight:800;font-size:1.5rem;color:var(--primary);}
.htg-result-note{font-size:0.78rem;color:#7a8985;margin-top:14px;line-height:1.5;}
.htg-result-tools{display:flex;gap:8px;margin-top:16px;}
.htg-result-tools button{flex:1;padding:9px;border-radius:8px;border:1px solid var(--border);background:#fff;font-size:0.8rem;font-weight:600;cursor:pointer;}
.htg-result-tools button:hover{border-color:var(--primary);color:var(--primary);}
.htg-copy-flash{font-size:0.78rem;color:var(--success);margin-top:8px;display:none;text-align:center;}
@media(max-width:900px){.htg-calc-shell{grid-template-columns:1fr;}}