.battery-calc{color:#111;font:14px/1.5 var(--font-body);background:#fafafa;border:1px solid #e4e4e4;border-radius:18px;margin:2rem 0;padding:28px}.article__body .battery-calc h2,.battery-calc h2{font:700 26px/1.2 var(--font-heading);margin:0 0 10px}.article__body .battery-calc p,.battery-calc p{margin:0 0 14px}.battery-calc__lead{color:#666}.battery-calc__boiler{justify-content:space-between;align-items:center;gap:16px;margin:22px 0 10px;display:flex}.battery-calc__boiler>span{gap:4px;min-width:0;display:grid}.battery-calc__boiler small{color:#666}.battery-calc button,.battery-calc__footer a{color:#111;min-height:44px;font:600 13px/1.4 var(--font-body);cursor:pointer;background:#fff;border:1px solid #d9d9d9;border-radius:8px;justify-content:center;align-items:center;padding:10px 14px;text-decoration:none;display:inline-flex}.battery-calc__boiler button{flex-shrink:0}.battery-calc button:hover,.battery-calc__footer a:hover{border-color:#111}.battery-calc__units{border:0;flex-wrap:wrap;gap:16px;margin:22px 0 16px;padding:0;display:flex}.battery-calc__units legend{margin-bottom:8px;font-weight:600}.battery-calc__units label{cursor:pointer;align-items:center;gap:8px;min-height:44px;display:inline-flex}.battery-calc input[type=radio]{width:16px;min-width:16px;height:16px;accent-color:var(--premium-red);flex:0 0 16px;margin:0}.battery-calc__fields{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin:14px 0;display:grid}.battery-calc__fields>label{gap:8px;font-weight:600;display:grid}.battery-calc__input{background:#fff;border:1px solid #d9d9d9;border-radius:8px;align-items:center;gap:6px;padding:0 12px;display:flex}.battery-calc__input input{width:100%;min-width:0;min-height:48px;font:600 20px var(--font-body);color:#111;background:0 0;border:0}.battery-calc__input>span{color:#666;flex-shrink:0;font-size:12px}.battery-calc__input:focus-within{outline:2px solid var(--premium-red);outline-offset:2px}.battery-calc__input input:focus{outline:none}.battery-calc__hint{color:#666;font-size:12px;line-height:1.65}.battery-calc__error{color:var(--premium-red)}.battery-calc__settings{border-top:1px solid #e4e4e4;padding:14px 0}.battery-calc__settings summary{cursor:pointer;min-height:32px;font-weight:600}.battery-calc__result{color:#fff;background:#111;border-radius:12px;gap:7px;padding:22px;display:grid}.battery-calc__eyebrow{font:500 11px var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:#ccc}.battery-calc__runtime{font:700 clamp(28px, 5vw, 38px)/1.15 var(--font-heading)}.article__body .battery-calc__result p{color:#ccc;margin:0;font-size:13px}.battery-calc__targets{grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0;display:grid}.battery-calc__targets>div{background:#fff;border:1px solid #e4e4e4;border-radius:9px;gap:5px;padding:12px;display:grid}.battery-calc__targets span,.battery-calc__targets small{color:#666;font-size:12px}.battery-calc__targets strong{font-size:16px}.battery-calc__footer{flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:20px;display:flex}.battery-calc__footer a{background:var(--premium-red);color:#fff;border-color:var(--premium-red)}.battery-calc a:focus-visible,.battery-calc button:focus-visible,.battery-calc summary:focus-visible{outline:2px solid var(--premium-red);outline-offset:3px}@media (width<=600px){.battery-calc{padding:18px}.battery-calc__boiler{flex-direction:column;align-items:stretch;gap:10px}.article__body .battery-calc h2{font-size:23px}.battery-calc__fields{grid-template-columns:1fr}.battery-calc__targets{gap:6px}.battery-calc__targets>div{padding:10px 8px}.battery-calc__targets strong{font-size:13px}.battery-calc__footer{flex-direction:column-reverse}}