.site-header{position:relative;background:var(--ink)}
.calc-result #planned{font-size:clamp(3.5rem,7vw,5rem);font-weight:850;line-height:1.05;letter-spacing:-.04em}.calc-result #planned-litres{font-size:1.6rem;font-weight:700}.calc-result #annulus{font-size:1rem;font-weight:600}.calc-result #plan-label{font-size:1.35rem}.calc-result .calc-big{margin:16px 0 8px}
.calc-intro{padding:62px 0 32px}.calc-intro h1{font-size:clamp(2.4rem,5vw,4.5rem);max-width:900px;line-height:1.08}.calc-intro p:last-child{max-width:760px;color:var(--muted)}
.calculator{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start;margin-bottom:48px}.calc-panel{background:#fff;border:1px solid var(--dark-line);padding:30px;border-radius:12px}.calc-panel h2{font-size:1.5rem;letter-spacing:-.02em;margin-bottom:24px}.calc-field{margin-bottom:20px}.calc-field label{display:block;font-weight:750;margin-bottom:6px}.calc-field small{display:block;color:var(--muted);font-size:.8rem;margin-top:6px}.calc-input{display:flex;align-items:center;border:1px solid #afbec4;border-radius:6px;overflow:hidden}.calc-input input{width:100%;min-width:0;padding:12px;border:0;font:600 1.15rem system-ui;color:var(--ink);background:#fff}.calc-input span{padding:0 14px;color:var(--muted)}.calc-input:focus-within{outline:3px solid var(--cyan-deep);outline-offset:2px}summary{cursor:pointer;font-weight:750;padding:12px 0}.calc-options{padding-top:12px}.calc-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}.calc-secondary{background:transparent;border:1px solid #afbec4;border-radius:5px;padding:10px 15px;font:600 .9rem system-ui;cursor:pointer}.calc-result{background:var(--ink);color:#fff;border-color:var(--ink)}.calc-result .eyebrow{margin-bottom:12px}.calc-big{font-size:clamp(3rem,6vw,5rem);line-height:1.1;font-weight:800;letter-spacing:-.05em;color:var(--cyan);overflow-wrap:anywhere}.calc-big small{font-size:1.5rem;letter-spacing:0}.calc-litres{font-size:1.15rem;margin:10px 0 2px}.calc-per{color:#a4b9c1;margin-bottom:24px}.calc-table{margin:0}.calc-table div{display:flex;gap:14px;justify-content:space-between;padding:14px 0;border-top:1px solid var(--line);font-size:.88rem}.calc-table dt{max-width:53%;color:#c1d0d6}.calc-table dd{margin:0;text-align:right;font-weight:650;overflow-wrap:anywhere}.calc-planned{padding:20px 0 0}.calc-planned strong{display:block;font-size:1.25rem;color:var(--cyan);margin-top:5px}.calc-status{font-size:.82rem;color:#c1d0d6;margin-top:16px}.calc-error{padding:18px;border-left:4px solid #bc4330;background:#fff1ee;color:#842b1e}.calc-explain{padding:32px 0 60px;max-width:900px}.calc-explain h2{font-size:1.8rem}.calc-explain h3{margin-top:26px}.calc-explain a{text-decoration:underline}.calc-formula{background:#fff;padding:16px;border-left:3px solid var(--cyan-deep);overflow-wrap:anywhere}.calc-drawing{display:flex;align-items:center;gap:20px;margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}.calc-drawing svg{width:110px;height:110px;flex:none}.calc-drawing p{font-size:.82rem;color:#c1d0d6;margin:0}.calc-drawing strong{color:var(--cyan)}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--cyan-deep);outline-offset:4px}button:disabled{opacity:.5;cursor:default}.calc-copy{width:100%;min-height:180px;margin-top:10px}.calc-mobile-link{display:none}#copy-status{font-size:.85rem;margin-top:10px}[hidden]{display:none!important}@media(max-width:800px){.calculator{grid-template-columns:1fr}.calc-panel{padding:24px}.calc-intro{padding-top:38px}.calc-mobile-link{display:inline-flex}.site-header nav{display:none}.calc-table div{font-size:.84rem}.calc-drawing{gap:12px}.wrap{width:calc(100% - 32px)}}