:root{color-scheme:dark;--bg:#0b1420;--panel:#142333;--panel2:#1a2d3e;--stroke:#324657;--text:#ecf3f4;--muted:#b6c7cd;--accent:#b5f36d;--accentdark:#132019;--focus:#f1d78c;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(ellipse at top right,#1c3240,transparent 48%),var(--bg);color:var(--text);line-height:1.62}
a{color:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.container{max-width:1130px;margin:0 auto;padding:0 24px}.skip{position:absolute;top:-100px;background:var(--accent);color:#111;padding:12px;z-index:10}.skip:focus{top:8px}
.header{border-bottom:1px solid var(--stroke);background:#0c1824e8}.header-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}.brand{font-weight:900;text-decoration:none;font-size:1.12rem;letter-spacing:-.04em}.brand em{font-style:normal;color:var(--accent)}.nav{display:flex;gap:22px;flex-wrap:wrap}.nav a{font-size:.94rem;color:var(--muted);text-decoration:none}.nav a:hover,.footer a:hover{color:var(--accent)}
.hero{padding:78px 0 55px;max-width:850px}.eyebrow{color:var(--accent);font-weight:800;letter-spacing:.18em;text-transform:uppercase;font-size:.72rem}h1,h2,h3{line-height:1.15;letter-spacing:-.04em}h1{font-size:clamp(2.5rem,6vw,5.25rem);margin:12px 0 20px}h2{font-size:clamp(1.7rem,3.3vw,2.5rem);margin:0 0 18px}h3{font-size:1.25rem}.lede{font-size:1.22rem;max-width:720px;color:var(--muted)}.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0}.button{display:inline-block;text-decoration:none;font-weight:800;border-radius:12px;border:1px solid var(--stroke);padding:12px 19px;background:var(--panel);color:var(--text);cursor:pointer}.button.primary{background:var(--accent);color:var(--accentdark);border-color:var(--accent)}.button:hover{filter:brightness(1.1)}.note,.subtext{color:var(--muted);font-size:.94rem}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.card,.panel{background:var(--panel);border:1px solid var(--stroke);border-radius:18px;padding:26px}.card{text-decoration:none;display:block;transition:transform .18s,border-color .18s}.card:hover{transform:translateY(-3px);border-color:var(--accent)}.card p{color:var(--muted)}.card span{font-size:.71rem;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:800}.card h3{margin:12px 0}.link{color:var(--accent);font-weight:800}.section{padding:45px 0 65px}.section-heading{max-width:690px}.section-heading p,.text-muted{color:var(--muted)}.feature{display:grid;grid-template-columns:1.1fr .9fr;gap:25px;align-items:center;margin:30px 0 0}.callout{background:linear-gradient(140deg,#1c3340,#152632);border:1px solid #46624f;border-radius:22px;padding:33px}.callout strong{color:var(--accent);font-size:2rem}.footer{border-top:1px solid var(--stroke);margin-top:75px;padding:28px 0;color:var(--muted);font-size:.91rem}.footer a{color:var(--muted)}.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.breadcrumbs{padding-top:29px;font-size:.85rem;color:var(--muted)}.breadcrumbs a{color:var(--muted)}.tool-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:22px}.formgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{display:flex;flex-direction:column;gap:8px;font-weight:600;font-size:.93rem}.field input{width:100%;font:inherit;border-radius:10px;border:1px solid #667a88;background:#0b1823;color:var(--text);padding:13px}.form-actions{display:flex;align-items:center;gap:12px;margin-top:18px;flex-wrap:wrap}.result{margin-top:18px;padding:18px;background:#0b1823;border:1px solid #517c57;border-radius:13px;min-height:85px}.result strong{display:block;font-size:1.7rem;color:var(--accent)}.result[hidden]{display:none}.formula{word-wrap:break-word;color:var(--accent);font-weight:700}.faq details{border-top:1px solid var(--stroke);padding:18px 0}.faq summary{cursor:pointer;font-weight:700}.faq details p{color:var(--muted)}.mini-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.mini-grid .panel{padding:18px}.mini-grid p{margin:4px 0;color:var(--muted)}.mini-grid strong{color:var(--accent)}.warning{color:#e5d4b2}
@media(max-width:720px){
.hero{padding-top:48px}
.grid,.feature,.tool-layout,.mini-grid,.formgrid{grid-template-columns:1fr}
.container{padding:0 18px}
.card,.panel,.callout{padding:21px}
.header-inner{display:block;min-height:0;padding-top:12px;padding-bottom:0}
.brand{display:block;margin-bottom:11px}
.nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:5px;overflow-x:auto;padding-bottom:12px}
.nav a{white-space:nowrap;font-size:clamp(.67rem,2.75vw,.85rem);line-height:1.35;letter-spacing:-.025em}
}

/* Long-form resource pages */
.guide-hero{padding:58px 0 32px;max-width:890px}
.guide-article{max-width:840px}
.guide-section{padding:22px 0 12px;border-top:1px solid var(--stroke)}
.guide-section h2{margin:12px 0 22px}
.guide-section p{color:var(--muted);font-size:1.06rem;line-height:1.8}
.guide-section strong{color:var(--text)}
.guide-section a:not(.button){color:var(--accent);text-underline-offset:3px}
.guide-list{padding-left:25px;color:var(--muted);line-height:1.8;font-size:1.04rem}
.guide-list li{padding:0 0 12px 4px}
.guide-list strong{color:var(--text)}
.guide-cta{background:var(--panel);border:1px solid var(--stroke);padding:27px;border-radius:18px;margin:28px 0}
.guide-cta h2{font-size:1.55rem;margin:0 0 12px}
.guide-cta p{color:var(--muted)}
.resource-nav{border-top:1px solid var(--stroke);display:flex;gap:16px;flex-wrap:wrap;padding:30px 0}
.resource-nav a{color:var(--accent);font-weight:700}
@media(max-width:720px){.guide-hero{padding:36px 0 26px}.guide-section p,.guide-list{font-size:1rem}.guide-cta{padding:20px}}

/* Clear next step shown only after a successful calculation */
.after-result{margin-top:18px;border:1px solid #668757;border-radius:15px;padding:22px;background:linear-gradient(135deg,#1b3541,#172e31)}
.after-result[hidden]{display:none}
.after-result h3{margin:10px 0}
.after-result p{color:var(--muted)}
.after-result .note{font-size:.81rem;margin:10px 0 0}
.after-result .button{max-width:100%;white-space:normal;text-align:center}
@media(max-width:720px){.after-result{padding:20px}.after-result .button{display:block;width:100%}}