:root{--brand: #0b5fff;--brand-dark: #0847c2;--ink: #101828;--muted: #475467;--line: #e4e7ec;--bg: #ffffff;--bg-soft: #f6f8fc;--success: #067647;--warn-bg: #fff8e6;--warn-line: #f5c518;--radius: 14px;--max: 1080px;--shadow: 0 6px 24px rgba(16, 24, 40, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}img,svg{max-width:100%;height:auto}a{color:var(--brand)}a:hover{color:var(--brand-dark)}.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:50;background:#fffffff5;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:19px}.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#00c2ff);color:#fff;display:grid;place-items:center;font-weight:900}.main-nav{display:flex;gap:4px;align-items:center}.main-nav a{text-decoration:none;color:var(--muted);font-weight:600;font-size:15.5px;padding:8px 12px;border-radius:8px}.main-nav a:hover{color:var(--ink);background:var(--bg-soft)}@media(max-width:720px){.main-nav a:not(.nav-cta){display:none}}.nav-cta{background:var(--brand);color:#fff!important}.nav-cta:hover{background:var(--brand-dark)}.hero{background:linear-gradient(180deg,#eef4ff,#fff);padding:56px 0 40px}.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 12px;letter-spacing:-.02em}.hero p.lead{font-size:19px;color:var(--muted);max-width:640px;margin:0 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span{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-weight:600}.input-euro input{padding-right:44px!important}.result{background:var(--bg-soft);border-radius:var(--radius);padding:24px;align-self:start}.result h2{margin:0 0 12px;font-size:20px}.result-table{width:100%;border-collapse:collapse;font-size:15.5px}.result-table td{padding:9px 0;border-bottom:1px dashed var(--line)}.result-table td:last-child{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}.result-table tr.total td{border-bottom:none;font-weight:800;font-size:18px;padding-top:14px}.result-table tr.total td:last-child{color:var(--brand-dark)}.result-net{background:#e9f7ef;border-radius:10px;padding:12px 16px;margin-top:12px;display:flex;justify-content:space-between;font-weight:800}.result-net span:last-child{color:var(--success);font-size:20px}.notice{border:1px solid var(--warn-line);background:var(--warn-bg);border-radius:10px;padding:14px 16px;font-size:14.5px;color:#5c4a00;margin:20px 0}.notice strong{display:block;margin-bottom:2px}.info-box{border:1px solid var(--line);background:var(--bg-soft);border-radius:10px;padding:14px 16px;font-size:14.5px;color:var(--muted);margin:20px 0}.prose{max-width:760px}.prose h2{margin-top:36px}.prose h3{margin-top:24px}.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:15.5px}.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left}.prose th{background:var(--bg-soft)}.formula{background:var(--bg-soft);border-left:4px solid var(--brand);padding:14px 18px;border-radius:0 10px 10px 0;font-family:ui-monospace,monospace;font-size:15px;margin:16px 0;overflow-x:auto}details.faq{border:1px solid var(--line);border-radius:10px;margin-bottom:10px;background:#fff}details.faq summary{cursor:pointer;padding:14px 18px;font-weight:700;list-style:none}details.faq summary::-webkit-details-marker{display:none}details.faq 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