:root{--bg:#f7f9fc;--surface:#fff;--surface-soft:#eef3f9;--text:#172033;--muted:#566177;--line:#c7d2e2;--accent:#0757b8;--accent-strong:#003f8f;--danger:#a51d2d;--success:#137347;--focus:#f4b400;--radius:.7rem;--shadow:0 8px 28px #14284614}@media (prefers-color-scheme:dark){:root{--bg:#10151f;--surface:#171f2c;--surface-soft:#202b3a;--text:#f2f5fb;--muted:#bac4d6;--line:#46546a;--accent:#83b8ff;--accent-strong:#b6d4ff;--danger:#ff9da9;--success:#7de0ad;--focus:#ffd166;--shadow:none}}*{box-sizing:border-box}html{color-scheme:light dark;background:var(--bg);scroll-behavior:smooth}body{color:var(--text);background:var(--bg);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.55}a{color:var(--accent);text-underline-offset:.18em}a:hover{color:var(--accent-strong)}button,input,select{font:inherit}button,input,select,a{touch-action:manipulation}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.shell{width:min(100% - 2rem,70rem);margin-inline:auto}.skip-link{z-index:20;background:var(--surface);padding:.75rem 1rem;position:fixed;inset:0 auto auto 0;transform:translateY(-120%)}.skip-link:focus{transform:translateY(0)}.site-header{border-bottom:1px solid var(--line);background:var(--surface)}.header-inner{align-items:center;gap:1.25rem;min-height:4.5rem;display:flex}.brand{color:var(--text);letter-spacing:-.025em;font-weight:760;line-height:1.05;text-decoration:none;display:grid}.brand small{color:var(--muted);letter-spacing:0;margin-top:.25rem;font-size:.7rem;font-weight:550}.site-header nav{gap:1rem;margin-left:auto;display:flex}.site-header nav a,.language-switch{align-items:center;min-height:44px;font-size:.9rem;display:inline-flex}.site-header [aria-current=page]{color:var(--text);font-weight:700;text-decoration-thickness:2px}.language-switch{white-space:nowrap}main{padding-block:2.5rem 5rem}.hero{max-width:48rem;margin-bottom:1.5rem}.eyebrow{color:var(--accent);text-transform:uppercase;letter-spacing:.09em;font-size:.75rem;font-weight:750}h1,h2,h3{letter-spacing:-.025em;line-height:1.16}h1{margin:.25rem 0 .8rem;font-size:clamp(2rem,6vw,3.4rem)}h2{margin-top:2.5rem;font-size:clamp(1.4rem,4vw,2rem)}.lede{color:var(--muted);margin:0;font-size:clamp(1.05rem,2.5vw,1.25rem)}.calculator{background:var(--surface);border:1px solid var(--line);border-radius:calc(var(--radius) + .2rem);box-shadow:var(--shadow);padding:clamp(1rem,3vw,1.75rem)}.calculator fieldset{border:0;min-width:0;margin:0 0 1.2rem;padding:0}.calculator legend,.field-label{margin-bottom:.5rem;font-weight:720}.segmented{flex-wrap:wrap;gap:.5rem;display:flex}.segmented label{position:relative}.segmented input{opacity:0;pointer-events:none;position:absolute}.segmented span{border:1px solid var(--line);background:var(--surface-soft);border-radius:.55rem;align-items:center;min-height:44px;padding:.55rem .85rem;display:inline-flex}.segmented input:checked+span{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, var(--surface));box-shadow:inset 0 0 0 1px var(--accent)}.segmented input:focus-visible+span{outline:3px solid var(--focus);outline-offset:3px}.endpoint-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}.endpoint{border:1px solid var(--line);border-radius:var(--radius);padding:1rem}.endpoint h3{margin:0 0 .8rem}.date-fields,.time-fields{grid-template-columns:repeat(3,minmax(0,1fr));gap:.5rem;display:grid}.time-fields[data-display="12"]{grid-template-columns:repeat(4,minmax(0,1fr))}.field{gap:.35rem;min-width:0;display:grid}.field label{color:var(--muted);font-size:.82rem;font-weight:650}.field input,.field select{border:1px solid var(--line);background:var(--surface);width:100%;min-height:44px;color:var(--text);border-radius:.45rem;padding:.5rem}.field input[aria-invalid=true],.field select[aria-invalid=true]{border-color:var(--danger);box-shadow:inset 0 0 0 1px var(--danger)}.field-error{min-height:1.35em;color:var(--danger);margin:.35rem 0 0;font-size:.85rem}.inline-options{flex-wrap:wrap;gap:.75rem 1.25rem;margin-block:1rem;display:flex}.check{align-items:center;gap:.55rem;min-height:44px;display:inline-flex}.check input{width:1.15rem;height:1.15rem}.button-row{flex-wrap:wrap;gap:.65rem;margin-top:1rem;display:flex}button,.button{border:1px solid var(--line);background:var(--surface-soft);min-height:44px;color:var(--text);cursor:pointer;border-radius:.55rem;padding:.6rem .9rem}button.primary{color:#fff;background:#0757b8;border-color:#0757b8;font-weight:730}button:hover{border-color:var(--accent)}.subtle{color:var(--muted);font-size:.9rem}.error-summary{color:var(--danger);border:1px solid var(--danger);background:color-mix(in srgb, var(--danger) 6%, var(--surface));border-radius:.55rem;margin-block:1rem;padding:.8rem 1rem}.result{border-left:4px solid var(--accent);border-radius:.35rem var(--radius) var(--radius) .35rem;background:var(--surface-soft);min-height:10rem;margin-top:1.25rem;padding:1.2rem}.result[hidden],[hidden]{display:none!important}.result h2{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:0 0 .5rem;font-size:1rem}.result-primary{font-variant-numeric:tabular-nums;margin:.3rem 0 1rem;font-size:clamp(1.55rem,5vw,2.5rem);font-weight:790;line-height:1.15}.result-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:.7rem;display:grid}.result-stat{border:1px solid var(--line);background:var(--surface);border-radius:.5rem;margin:0;padding:.75rem}.result-stat dt{color:var(--muted);font-size:.78rem}.result-stat dd{font-variant-numeric:tabular-nums;margin:.25rem 0 0;font-weight:740}.content-grid{grid-template-columns:minmax(0,2fr) minmax(15rem,1fr);align-items:start;gap:2rem;display:grid}.prose{max-width:48rem}.prose li+li{margin-top:.5rem}.note{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:1rem}.site-footer{border-top:1px solid var(--line);background:var(--surface)}.footer-inner{min-height:5rem;color:var(--muted);justify-content:space-between;align-items:center;gap:1rem;display:flex}.footer-inner nav{gap:1rem;display:flex}.noscript{border:1px solid var(--danger);color:var(--danger);padding:.8rem}@media (width<=760px){.header-inner{flex-wrap:wrap;align-items:flex-start;gap:.5rem 1rem;padding-block:.8rem}.site-header nav{order:3;width:100%;margin-left:0;overflow-x:auto}.language-switch{margin-left:auto}.endpoint-grid,.content-grid,.result-grid{grid-template-columns:1fr}main{padding-top:1.7rem}}@media (width<=480px){.date-fields,.time-fields,.time-fields[data-display="12"]{grid-template-columns:repeat(2,minmax(0,1fr))}.site-header nav{flex-wrap:wrap;max-width:100%;overflow-x:visible}.footer-inner{flex-direction:column;align-items:flex-start;padding-block:1rem}.footer-inner nav{flex-wrap:wrap}.field input,.field select{min-width:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}