:root { --ink:#17201d; --muted:#60706b; --paper:#fbfcf9; --line:#d8e0db; --accent:#0d6c52; --accent-soft:#e3f3eb; --warm:#e6aa45; }
* { box-sizing:border-box; }
body { margin:0; color:var(--ink); background:linear-gradient(135deg,#f3f7f2,#fffaf1); font:16px/1.55 Inter,ui-sans-serif,system-ui,sans-serif; }
.page-shell { width:min(1120px,calc(100% - 32px)); margin:0 auto; padding:48px 0 72px; }
.hero { max-width:740px; margin-bottom:28px; }
.eyebrow { margin:0 0 6px; color:var(--accent); font-size:.75rem; font-weight:800; letter-spacing:.11em; }
h1,h2 { line-height:1.12; margin:.1em 0 .45em; } h1 { font-size:clamp(2.25rem,6vw,4.5rem); } h2 { font-size:clamp(1.4rem,3vw,2rem); }
.hero p:last-child,.field-help,.content { color:var(--muted); }
.calculator,.content { background:rgba(255,255,255,.86); border:1px solid var(--line); border-radius:20px; box-shadow:0 14px 40px rgba(25,49,39,.07); }
.calculator { padding:clamp(18px,4vw,36px); }
.form-grid { display:grid; grid-template-columns:1.4fr 1fr; gap:28px; }
fieldset { min-width:0; margin:0; padding:0; border:0; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; align-content:start; }
fieldset:nth-child(2) { padding-left:28px; border-left:1px solid var(--line); }
legend { grid-column:1/-1; padding:0 0 8px; font-weight:800; font-size:1.1rem; }
.optional { color:var(--muted); font-size:.78rem; font-weight:500; } .required { color:#b33535; }
label { display:grid; gap:6px; font-size:.9rem; font-weight:650; } input,select { width:100%; min-height:44px; padding:9px 11px; color:var(--ink); border:1px solid #b9c7c0; border-radius:9px; background:#fff; font:inherit; } input:focus,select:focus { outline:3px solid #bde7d4; border-color:var(--accent); }
.field-help { grid-column:1/-1; margin:0; font-size:.83rem; }.price-grid { grid-column:1/-1; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
button { min-height:44px; padding:10px 16px; border-radius:9px; cursor:pointer; font:700 .95rem inherit; } .primary { margin-top:24px; width:100%; color:#fff; background:var(--accent); border:1px solid var(--accent); }.primary:hover { background:#09533f; }.secondary { background:#fff; color:var(--accent); border:1px solid var(--accent); }
.results { margin-top:32px; padding-top:28px; border-top:1px solid var(--line); }.results-heading { display:flex; gap:16px; align-items:center; justify-content:space-between; }.results-heading h2 { margin:0; }.result-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; margin:20px 0; }.result-card,.cost-card { padding:16px; border-radius:13px; background:var(--paper); border:1px solid var(--line); }.result-card span { display:block; color:var(--muted); font-size:.82rem; }.result-card strong { display:block; margin-top:5px; font-size:1.45rem; }.cost-card { background:var(--accent-soft); border-color:#b9e1ca; }.cost-card strong { display:block; font-size:clamp(1.35rem,3vw,2rem); }.cost-card span { display:block; color:var(--accent); font-weight:700; }.math-details { margin-top:16px; color:var(--muted); }.math-details summary,.content summary { color:var(--ink); cursor:pointer; font-weight:750; }.math-details p { margin:.55em 0; }.content { margin-top:28px; padding:clamp(20px,4vw,38px); }.content h2:not(:first-child) { margin-top:1.75em; }.content li { margin:.5em 0; }.content details { padding:14px 0; border-top:1px solid var(--line); }.content details p { margin-bottom:0; }code { padding:.1em .25em; background:#edf1ee; border-radius:4px; }
@media (max-width:760px) { .page-shell { width:min(100% - 20px,640px); padding-top:22px; }.form-grid { grid-template-columns:1fr; gap:20px; } fieldset:nth-child(2) { padding:20px 0 0; border-left:0; border-top:1px solid var(--line); }.result-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }.results-heading { align-items:flex-start; flex-direction:column; }.secondary { width:100%; } }
@media (max-width:420px) { fieldset,.price-grid { grid-template-columns:1fr; }.result-grid { grid-template-columns:1fr; }.page-shell { width:calc(100% - 16px); }.calculator,.content { border-radius:14px; } }
.site-footer { display:flex; flex-wrap:wrap; gap:14px 20px; padding:24px 4px 0; color:var(--muted); font-size:.9rem; }.site-footer a { color:var(--accent); font-weight:700; text-underline-offset:3px; }