@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:400;src:url(./dm-sans-latin-400-normal-CW0RaeGs.woff2)format("woff2"),url(./dm-sans-latin-400-normal-BwCSEQnW.woff)format("woff")}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:500;src:url(./dm-sans-latin-500-normal-B9HHJjqV.woff2)format("woff2"),url(./dm-sans-latin-500-normal-Dr3UlScf.woff)format("woff")}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:600;src:url(./dm-sans-latin-600-normal-Aqo67rzb.woff2)format("woff2"),url(./dm-sans-latin-600-normal-BmdmIIQ2.woff)format("woff")}@font-face{font-family:DM Sans;font-style:normal;font-display:swap;font-weight:700;src:url(./dm-sans-latin-700-normal-DvUfVpUG.woff2)format("woff2"),url(./dm-sans-latin-700-normal-CUSSCpQX.woff)format("woff")}@font-face{font-family:DM Mono;font-style:normal;font-display:swap;font-weight:500;src:url(./dm-mono-latin-500-normal-DRMDZjhP.woff2)format("woff2"),url(./dm-mono-latin-500-normal-CN8Miw6E.woff)format("woff")}:root{--ink:#111827;--accent:#2452e8;--paper:#f8fafc;--surface:#fefefe;--text:#475569;--muted:#647185;--line:#e0e5ed;--blue-soft:#eef4ff;--green:#087a4d;--green-soft:#edf9f2;--danger:#b42335;--orange:#d58228;--radius:12px;--body:"DM Sans",sans-serif;--data:"DM Mono",monospace}*{box-sizing:border-box}html{scroll-padding-top:88px}body{background:var(--surface);color:var(--ink);font:400 16px/1.6 var(--body);-webkit-font-smoothing:antialiased;margin:0}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}a{color:inherit;text-underline-offset:4px;text-decoration-thickness:1px}a:hover{color:var(--accent)}a:active{opacity:.85}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid 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var(--line);position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:32px;min-height:72px;display:flex;position:relative}.brand{letter-spacing:-.02em;color:var(--ink);flex-shrink:0;align-items:center;gap:12px;font-size:20px;font-weight:700;text-decoration:none;display:inline-flex}.brand:hover{color:var(--ink)}.brand-mark{color:var(--accent);letter-spacing:-.08em;align-items:center;font-size:28px;font-weight:700;line-height:1;display:inline-flex}.brand-mark sup{letter-spacing:0;align-self:flex-start;margin-top:-2px;margin-left:2px;font-size:14px}.site-nav{align-items:center;gap:28px;display:flex}.site-nav a{min-height:44px;color:var(--text);white-space:nowrap;align-items:center;font-size:14px;font-weight:500;text-decoration:none;transition:color .15s ease-out,background-color .15s ease-out;display:inline-flex}.site-nav a:hover,.site-nav a[aria-current]{color:var(--accent)}.site-nav .nav-cta{color:var(--surface);background:var(--accent);border-radius:8px;gap:12px;padding:0 20px;font-weight:600}.site-nav .nav-cta:hover{color:var(--surface);background:#1b40bd}.nav-cta .icon{width:16px}.menu-toggle{background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;width:44px;height:44px;display:none}.menu-toggle:hover{background:var(--paper)}.menu-toggle:active{background:var(--blue-soft)}.calculator-stage{padding-bottom:24px}.page-intro{text-align:center;padding:56px 0 44px}.hero-label{background:var(--blue-soft);color:var(--accent);letter-spacing:.065em;text-transform:uppercase;border-radius:20px;margin-bottom:16px;padding:4px 12px;font-size:12px;font-weight:600;display:inline-block}.page-intro h1{max-width:900px;margin-inline:auto}.intro-text{max-width:680px;margin:20px auto 0;font-size:18px;line-height:1.65}.calculator-layout{grid-template-columns:minmax(0,1fr) 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var(--line);margin-top:20px;padding-top:12px}.diagram-details summary{cursor:pointer;min-height:32px;color:var(--text);align-items:center;gap:8px;font-size:13px;list-style:none;display:flex}.diagram-details summary::-webkit-details-marker{display:none}.diagram-details summary:hover{color:var(--accent)}.diagram-details summary>span{margin-left:auto;font-size:20px}.diagram-details[open] summary>span{transform:rotate(45deg)}.diagram-details .icon{width:16px;height:16px}.diagram-details>p{text-align:center;color:var(--muted);font-size:12px}.measure-diagram{width:100%;max-width:380px;height:220px;color:var(--accent);margin:12px auto;display:block}.measure-diagram text{font-family:var(--data);fill:currentColor;font-size:13px}.measure-diagram .diagram-area{font-size:18px}.result-actions{grid-template-columns:1fr 1fr;gap:12px;margin-top:16px;display:grid}.result-actions button{border:1px solid 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#edf0f5}.example-section,.guide-section,.faq-section,.related-section{padding-block:64px}.section-heading{text-align:center;margin-bottom:32px}.section-heading p{color:var(--text);margin-top:12px}.example-table{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}.example-table-heading,.example-list article{grid-template-columns:1fr 1.8fr 140px;align-items:center;gap:24px;padding:20px 24px;display:grid}.example-table-heading{color:var(--text);text-transform:uppercase;letter-spacing:.04em;background:#edf1f6;font-size:12px;font-weight:600}.example-table-heading>span:last-child{text-align:right}.example-list article+article{border-top:1px solid var(--line)}.example-list h3{font-size:15px;font-weight:600}.example-list p{font-size:14px;line-height:1.6}.example-list strong{font:500 20px/1.4 var(--data);text-align:right;color:var(--accent);white-space:nowrap}.example-list strong 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