:root{--ink:#13211c;--muted:#5b6862;--surface:#fff;--surface-soft:#f5f8f6;--line:#dce5df;--brand:#176b4a;--brand-dark:#102f24;--accent:#e7f2ec;--shadow:0 16px 45px #102f2414;color:var(--ink);background:var(--surface);font-synthesis:none;text-rendering:optimizelegibility;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--surface);min-width:320px;color:var(--ink);margin:0}a{color:inherit}.container{width:min(1160px,100% - 32px);margin-inline:auto}.site-header{z-index:20;backdrop-filter:blur(14px);border-bottom:1px solid var(--line);background:#fffffff0;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:24px;min-height:72px;display:flex}.brand{letter-spacing:-.02em;align-items:center;gap:10px;font-weight:800;text-decoration:none;display:inline-flex}.brand-mark{background:var(--brand-dark);color:#fff;border-radius:11px;place-items:center;width:38px;height:38px;font-size:.78rem;display:grid}nav{gap:22px;display:flex}nav a{color:var(--muted);font-size:.94rem;font-weight:650;text-decoration:none}nav a:hover{color:var(--ink)}.hero{background:linear-gradient(#f5faf7 0%,#fff 100%);padding:92px 0 70px}.hero-grid{grid-template-columns:1.2fr .8fr;align-items:center;gap:54px;display:grid}.eyebrow{background:var(--accent);color:var(--brand-dark);border-radius:999px;padding:7px 12px;font-size:.86rem;font-weight:750;display:inline-flex}h1{letter-spacing:-.055em;max-width:760px;margin:18px 0;font-size:clamp(2.5rem,6vw,5rem);line-height:.98}.hero-copy{max-width:660px;color:var(--muted);margin:0;font-size:clamp(1.05rem,2vw,1.28rem);line-height:1.65}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:30px;display:flex}.button{border-radius:12px;justify-content:center;align-items:center;min-height:48px;padding:0 20px;font-weight:750;text-decoration:none;display:inline-flex}.button-primary{background:var(--brand-dark);color:#fff}.button-secondary{border:1px solid var(--line);background:#fff}.hero-panel{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:24px;padding:28px}.hero-panel h2{margin:0 0 8px;font-size:1.1rem}.hero-panel p{color:var(--muted);margin:0 0 24px;line-height:1.55}.unit-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.unit-chip{background:var(--surface-soft);border:1px solid var(--line);border-radius:13px;padding:15px}.unit-chip strong{margin-bottom:4px;display:block}.unit-chip span{color:var(--muted);font-size:.86rem}.section{padding:76px 0}.section-soft{background:var(--surface-soft)}.section-heading{max-width:720px;margin-bottom:34px}.section-heading h2{letter-spacing:-.035em;margin:0 0 12px;font-size:clamp(2rem,4vw,3rem)}.section-heading p{color:var(--muted);margin:0;line-height:1.7}.tools-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;display:grid}.tool-card{border:1px solid var(--line);background:#fff;border-radius:18px;flex-direction:column;min-height:260px;padding:24px;text-decoration:none;transition:transform .16s,box-shadow .16s,border-color .16s;display:flex}.tool-card:hover{box-shadow:var(--shadow);border-color:#b9cbc0;transform:translateY(-3px)}.tool-category{background:var(--accent);width:fit-content;color:var(--brand-dark);border-radius:8px;margin-bottom:22px;padding:6px 9px;font-size:.75rem;font-weight:750}.tool-card h3{letter-spacing:-.02em;margin:0 0 10px;font-size:1.18rem}.tool-card p{color:var(--muted);margin:0 0 22px;font-size:.94rem;line-height:1.6}.tool-link{color:var(--brand);margin-top:auto;font-weight:750}.features{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.feature{border-top:3px solid var(--brand);background:#fff;padding:26px}.feature h3{margin:0 0 10px}.feature p{color:var(--muted);margin:0;line-height:1.65}.site-footer{border-top:1px solid var(--line);padding:42px 0}.footer-inner{justify-content:space-between;align-items:flex-start;gap:30px;display:flex}.footer-inner p{color:var(--muted);margin:7px 0 0}.footer-links{flex-wrap:wrap;gap:16px;display:flex}.footer-links a{color:var(--muted);text-decoration:none}@media (width<=980px){.hero-grid{grid-template-columns:1fr}.tools-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=680px){.container{width:min(100% - 24px,1160px)}.header-inner{min-height:64px}nav{display:none}.hero{padding:64px 0 50px}.hero-panel{padding:20px}.unit-row,.tools-grid,.features{grid-template-columns:1fr}.section{padding:58px 0}.footer-inner{flex-direction:column}}.info-page,.calculator-page{max-width:860px}.page-title{letter-spacing:-.05em;margin:18px 0 16px;font-size:clamp(2.4rem,6vw,4.5rem);line-height:1.02}.page-intro{max-width:760px;color:var(--muted);margin:0 0 36px;font-size:1.15rem;line-height:1.7}.prose{max-width:760px}.prose h2{letter-spacing:-.02em;margin:34px 0 10px;font-size:1.4rem}.prose p{color:var(--muted);line-height:1.75}.calculator-status{border:1px solid var(--line);background:var(--surface-soft);border-radius:18px;margin-top:32px;padding:28px}.calculator-status p{color:var(--muted);margin:8px 0 22px;line-height:1.65}.calculator-hero{background:linear-gradient(#f5faf7 0%,#fff 100%);padding:70px 0 22px}.calculator-shell{padding:18px 0 78px}.calculator-grid{grid-template-columns:minmax(0,1.3fr) minmax(320px,.7fr);align-items:start;gap:28px;display:grid}.calculator-form{gap:20px;display:grid}.form-section{border:1px solid var(--line);background:#fff;border-radius:20px;padding:26px}.form-section-heading{justify-content:space-between;gap:22px;margin-bottom:22px;display:flex}.form-section-heading>div{align-items:center;gap:11px;display:flex}.form-section-heading h2{letter-spacing:-.02em;margin:0;font-size:1.2rem}.form-section-heading p{max-width:360px;color:var(--muted);text-align:right;margin:0;font-size:.9rem;line-height:1.5}.step-label{background:var(--accent);width:28px;height:28px;color:var(--brand-dark);border-radius:999px;place-items:center;font-size:.8rem;font-weight:800;display:grid}.dimension-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.field{gap:8px;font-size:.9rem;font-weight:700;display:grid}.field-full{width:100%;margin-bottom:14px}.field input,.field select{width:100%;min-height:48px;color:var(--ink);font:inherit;background:#fff;border:1px solid #cfdad3;border-radius:11px;outline:none;padding:0 13px;font-weight:550}.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px #176b4a1f}.number-unit{grid-template-columns:minmax(0,1fr) 84px;display:grid}.number-unit input{border-right:0;border-radius:11px 0 0 11px}.number-unit select{background:var(--surface-soft);border-radius:0 11px 11px 0}.suffix-input{grid-template-columns:minmax(0,1fr) auto;align-items:stretch;display:grid}.suffix-input input{border-right:0;border-radius:11px 0 0 11px}.suffix-input span{background:var(--surface-soft);min-width:48px;color:var(--muted);border:1px solid #cfdad3;border-radius:0 11px 11px 0;place-items:center;padding:0 12px;font-weight:700;display:grid}.field-note{color:var(--muted);margin:14px 0 0;font-size:.84rem;line-height:1.55}.currency-field{max-width:280px;margin-top:14px}.results-panel{border:1px solid var(--line);background:var(--brand-dark);color:#fff;box-shadow:var(--shadow);border-radius:22px;padding:26px;position:sticky;top:96px}.results-header h2{letter-spacing:-.03em;margin:14px 0 8px;font-size:1.55rem}.results-header p{color:#ffffffb8;margin:0;line-height:1.5}.results-panel .eyebrow{color:#fff;background:#ffffff1f}.result-primary{background:#ffffff17;border-radius:16px;margin:26px 0 20px;padding:20px}.result-primary span{color:#ffffffb8;font-size:.83rem;display:block}.result-primary strong{letter-spacing:-.03em;margin:7px 0 3px;font-size:2rem;display:block}.result-primary small{color:#ffffffbf}.result-list{margin:0}.result-list>div{border-top:1px solid #ffffff1f;justify-content:space-between;gap:22px;padding:14px 0;display:flex}.result-list dt{color:#ffffffad}.result-list dd{text-align:right;margin:0;font-weight:750}.results-note{border-top:1px solid #ffffff24;margin-top:22px;padding-top:20px}.results-note p{color:#ffffffad;margin:6px 0 0;font-size:.86rem;line-height:1.55}.calculator-copy{max-width:900px}.calculator-copy h2{letter-spacing:-.025em;margin:34px 0 10px;font-size:1.6rem}.calculator-copy p{color:var(--muted);line-height:1.75}.formula-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:24px 0 34px;display:grid}.formula-grid article{border:1px solid var(--line);background:#fff;border-radius:16px;padding:20px}.formula-grid strong{margin-bottom:10px;display:block}.formula-grid code{background:var(--surface-soft);overflow-wrap:anywhere;border-radius:9px;padding:10px 12px;display:block}.source-note{font-size:.88rem}.source-note a{color:var(--brand)}@media (width<=900px){.calculator-grid{grid-template-columns:1fr}.results-panel{position:static}}@media (width<=680px){.calculator-hero{padding:50px 0 10px}.form-section{padding:20px}.form-section-heading{display:block}.form-section-heading>div{margin-bottom:8px}.form-section-heading p{text-align:left}.dimension-grid,.formula-grid{grid-template-columns:1fr}.number-unit{grid-template-columns:minmax(0,1fr) 78px}}