:root{--color-bg:#fff;--color-text:#111;--color-muted:#555;--color-line:#e5e5e5;--color-panel:#fafafa;--color-button:#111;--color-button-hover:#2d2d2d;--color-focus:#111;--shadow-soft:0 18px 40px #1111110f;--radius:22px;--content-width:1100px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--color-bg);color:var(--color-text);margin:0;font-family:Inter,Segoe UI,sans-serif;line-height:1.6}a{color:inherit}img{max-width:100%;display:block}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--color-focus);outline-offset:3px}.page-shell{max-width:var(--content-width);margin:0 auto;padding:32px 20px 96px}.topbar{border-bottom:1px solid var(--color-line);justify-content:space-between;align-items:center;gap:14px;padding:18px 0 12px;display:flex}.brand{color:inherit;letter-spacing:-.04em;align-items:center;gap:9px;font-size:1.1rem;font-weight:700;text-decoration:none;display:inline-flex}.brand-mark{flex:none;width:34px;height:34px;display:block}.topbar-links{color:var(--color-muted);gap:22px;margin:0;padding:0;font-size:.95rem;list-style:none;display:flex}.topbar-links a{text-decoration:none}.hero{padding-top:42px;padding-bottom:18px}.eyebrow{color:var(--color-muted);text-transform:uppercase;letter-spacing:.14em;margin:0 0 14px;font-size:.74rem;font-weight:700}.hero h1{letter-spacing:-.06em;margin:0;font-size:clamp(2.4rem,5vw,4.2rem);line-height:.96}.hero p{max-width:760px;color:var(--color-muted);margin:18px 0 0;font-size:1.08rem}.breadcrumbs{color:var(--color-muted);flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px;font-size:.92rem;display:flex}.breadcrumbs a{color:var(--color-muted);text-decoration:none}.calculator-shell{border:1px solid var(--color-line);border-radius:var(--radius);box-shadow:var(--shadow-soft);background:#fff;overflow:hidden}.calc-tabs{border-bottom:1px solid var(--color-line);background:#fff;gap:12px;padding:18px 18px 0;display:flex}.tab-button{border:1px solid var(--color-line);color:var(--color-text);background:#fff;border-radius:999px;padding:.8rem 1.2rem;font-weight:600;transition:all .2s}.tab-button[aria-selected=true]{background:var(--color-button);border-color:var(--color-button);color:#fff}.tab-panel{padding:28px 18px 18px;display:none}.tab-panel.active{display:block}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:12px;display:grid}.field{flex-direction:column;gap:8px;display:flex}.field label{font-size:.95rem;font-weight:600}.field input{appearance:none;border:1px solid var(--color-line);width:100%;color:var(--color-text);background:#fff;border-radius:14px;padding:.9rem 1rem;font-size:1rem}.field input:hover{border-color:#c9c9c9}.form-actions{flex-wrap:wrap;gap:12px;margin-top:20px;display:flex}.primary-button,.secondary-button{border:1px solid #0000;border-radius:12px;padding:.9rem 1.3rem;font-weight:700;transition:background .2s,transform .2s}.primary-button{background:var(--color-button);color:#fff}.primary-button:hover{background:var(--color-button-hover)}.secondary-button{border-color:var(--color-line);color:var(--color-text);background:#fff}.primary-button:hover,.secondary-button:hover{transform:translateY(-1px)}.form-help,.validation-message{color:var(--color-muted);margin-top:4px;font-size:.9rem}.validation-message{color:#9a1d1d;min-height:1.4rem;font-weight:600}.result-card{background:var(--color-panel);border:1px solid var(--color-line);border-radius:18px;margin-top:22px;padding:22px 20px}.result-card[hidden]{display:none}.result-title{letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted);margin:0 0 10px;font-size:.8rem}.result-main{letter-spacing:-.06em;margin:0;font-size:clamp(1.8rem,3vw,2.8rem)}.result-description{color:var(--color-muted);margin:10px 0 0}.result-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px;display:grid}.metric{border:1px solid var(--color-line);background:#fff;border-radius:14px;padding:14px 16px}.metric-label{color:var(--color-muted);margin-bottom:6px;font-size:.82rem;display:block}.metric-value{font-size:1.15rem;font-weight:700;display:block}.format-switcher{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.format-button{border:1px solid var(--color-line);color:var(--color-text);background:#fff;border-radius:999px;padding:.55rem .9rem;font-size:.88rem;font-weight:600}.format-button.is-active{background:var(--color-button);color:#fff;border-color:var(--color-button)}.info-grid{grid-template-columns:1.3fr .7fr;gap:26px;margin-top:44px;display:grid}.content-section{border-top:1px solid var(--color-line);padding:28px 0}.content-section h2{letter-spacing:-.05em;margin:0 0 18px;font-size:clamp(1.8rem,2.2vw,2.5rem)}.content-section h3{letter-spacing:-.03em;margin:26px 0 10px;font-size:1.22rem}.content-section p{color:var(--color-muted);max-width:70ch;margin:0 0 16px}.content-section ul,.content-section ol{color:var(--color-muted);margin:0 0 16px;padding-left:1.2rem}.faq{gap:14px;margin-top:30px;display:grid}.faq-item{border:1px solid var(--color-line);background:#fff;border-radius:16px;padding:16px 18px}.faq-item h3{margin:0 0 8px;font-size:1.05rem}.faq-item p{margin:0}.side-card{border:1px solid var(--color-line);background:var(--color-panel);border-radius:20px;height:fit-content;padding:22px 20px}.side-card h3{margin:0 0 10px;font-size:1.1rem}.side-card ul{color:var(--color-muted);gap:8px;margin:0;padding:0;list-style:none;display:grid}.side-card li:before{content:"•";margin-right:10px}.footer{border-top:1px solid var(--color-line);color:var(--color-muted);padding-top:36px;font-size:.92rem}.footer nav{margin-top:12px}.legal-copy{max-width:76ch}.legal-copy h2{margin:30px 0 10px;font-size:1.25rem}.legal-copy p,.legal-copy li{color:var(--color-muted)}@media (width<=760px){.topbar{flex-direction:column;align-items:flex-start;padding-top:14px}.topbar-links{flex-wrap:wrap;gap:14px}.form-grid,.info-grid,.result-grid{grid-template-columns:1fr}.calc-tabs{border-bottom:none;flex-direction:column}.tab-button{width:100%}.page-shell{padding-inline:14px}}