:root{color-scheme:light;--paper:#faf8f2;--surface:#fffefa;--soft:#edf2e9;--ink:#203a30;--body:#334b40;--muted:#5c6a62;--green:#1f4335;--accent:#a64525;--error:#9f2f23;--error-bg:#fff1ed;--line:#cbd3c9;--shadow:0 .4rem 1.5rem rgba(31,67,53,.08)}
*{box-sizing:border-box}html{font-size:100%}body{margin:0;background:var(--paper);color:var(--body);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Malgun Gothic",sans-serif;font-size:1rem;line-height:1.65;word-break:keep-all;overflow-wrap:anywhere}h1,h2,h3,p,dl{margin:0}h1,h2,h3{color:var(--ink);line-height:1.3;letter-spacing:-.035em}h1{font-size:clamp(2.1rem,7vw,4rem)}h2{font-size:clamp(1.45rem,3vw,2rem)}h3{font-size:1rem}.container{width:min(100% - 2rem,68rem);margin-inline:auto}.skip-link{position:absolute;z-index:10;left:1rem;top:.5rem;padding:.75rem 1rem;background:var(--surface);transform:translateY(-200%)}.skip-link:focus{transform:none}a:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.site-header{border-bottom:1px solid var(--line)}.header-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1rem;min-height:64px}.brand{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem .7rem;font-size:.8rem;font-weight:700}.brand span:first-child{font:700 1.8rem Georgia,serif;color:var(--green)}.home-link{display:inline-flex;align-items:center;min-height:44px;color:var(--green);font-weight:800}.pilot-badge{padding:.25rem .55rem;border:2px dashed var(--accent);color:var(--accent);font-size:.75rem;font-weight:800}
.intro-section{padding-block:clamp(2.5rem,7vw,5rem)}.eyebrow,.step{color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:.06em}.intro-section h1{margin-top:.5rem}.lead{max-width:38rem;margin-top:1rem;font-size:clamp(1.05rem,2.4vw,1.35rem);font-weight:650}.scope-note{max-width:44rem;margin-top:.75rem;color:var(--muted);font-size:.9rem}
.calculator-section{padding-block:clamp(2rem,5vw,4rem);background:var(--soft)}.calculator-layout{display:grid;gap:1rem}.input-panel,.result-panel{padding:clamp(1.25rem,4vw,2rem);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow)}.panel-heading h2{margin-top:.25rem}.panel-heading>p:last-child{margin-top:.5rem;color:var(--muted);font-size:.9rem}form{margin-top:1.5rem}.field+.field{margin-top:1.25rem}.field label{display:flex;flex-direction:column;gap:.1rem}.field label span{color:var(--ink);font-weight:800}.field label small{color:var(--muted)}.input-wrap{display:grid;grid-template-columns:1fr auto;align-items:center;margin-top:.5rem;border:2px solid var(--line);background:#fff}.input-wrap:focus-within{border-color:var(--green)}.input-wrap input{width:100%;min-height:56px;padding:.6rem .75rem;border:0;background:transparent;color:var(--ink);font:700 1.4rem system-ui}.input-wrap input:focus{outline:0}.input-wrap span{padding-inline:1rem;color:var(--muted);font-weight:800}.field-help{margin-top:.35rem;color:var(--muted);font-size:.8rem}.message{min-height:48px;margin-top:1.25rem;padding:.7rem .85rem;border-left:4px solid var(--line);background:var(--paper);font-weight:650}.message.is-error{border-left-color:var(--error);background:var(--error-bg);color:var(--error)}.message.is-ready{border-left-color:var(--green);background:var(--soft);color:var(--green)}.input-wrap.is-error{border-color:var(--error);background:var(--error-bg)}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin-top:1.5rem}.result-card{min-width:0;padding:1rem;border:1px solid var(--line);background:var(--paper)}.result-card p{display:flex;align-items:baseline;gap:.25rem;margin-top:.45rem}.result-card strong{color:var(--ink);font-size:clamp(1.75rem,8vw,2.8rem);line-height:1;font-variant-numeric:tabular-nums}.result-card p span{color:var(--accent);font-weight:800}.result-card small{display:block;margin-top:.55rem;color:var(--muted);line-height:1.5}.primary-result{grid-column:1/-1;background:var(--green);border-color:var(--green)}.primary-result h3,.primary-result strong{color:#fff}.primary-result p span{color:#f2b39b}.primary-result small{color:#dbe7df}
.formula-section{padding-block:clamp(3rem,7vw,5rem)}.formula-section h2{margin-top:.35rem}.formula-list{display:grid;gap:.75rem;margin-top:1.5rem}.formula-list div{padding:1rem;border:1px solid var(--line);background:var(--surface)}.formula-list dt{color:var(--ink);font-weight:800}.formula-list dd{margin:.25rem 0 0;color:var(--muted)}.disclaimer{padding-block:2rem;background:var(--green);color:#edf5f0}.disclaimer strong{display:block;color:#fff}.disclaimer p{margin-top:.4rem}.site-footer{padding-block:2rem;color:var(--muted);font-size:.85rem}.site-footer .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem 1rem}
.input-wrap input:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}
@media(min-width:42rem){.calculator-layout{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);align-items:start}.result-grid{gap:1rem}.formula-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:64rem){.result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.formula-list{grid-template-columns:repeat(5,minmax(0,1fr))}.formula-list div{min-height:132px}}