:root{color-scheme:light;--bg:#fbfaf7;--surface:#fff;--surface-2:#f3f1ec;--ink:#1d1b18;--ink-2:#57524a;--line:#ddd8ce;--accent:#2f6f4f;--accent-ink:#fff;--danger:#b3261e;--focus:#1a73e8;--radius:8px;--gap:16px;--measure:72ch;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono:ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark;--bg:#141412;--surface:#1d1c1a;--surface-2:#262522;--ink:#ecebe7;--ink-2:#b4afa6;--line:#3a3833;--accent:#6fbf94;--accent-ink:#0d1a13;--danger:#f2b8b5;--focus:#8ab4f8}}:root[data-theme=dark]{color-scheme:dark;--bg:#141412;--surface:#1d1c1a;--surface-2:#262522;--ink:#ecebe7;--ink-2:#b4afa6;--line:#3a3833;--accent:#6fbf94;--accent-ink:#0d1a13;--danger:#f2b8b5;--focus:#8ab4f8}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font:16px/1.55 var(--font);margin:0}a{color:var(--accent)}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.skip{position:absolute;left:-9999px}.skip:focus{z-index:10;background:var(--surface);padding:8px 12px;top:8px;left:16px}.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 16px}.site-header{border-bottom:1px solid var(--line);background:var(--surface)}.site-header .wrap{flex-wrap:wrap;align-items:center;gap:8px 24px;min-height:56px;display:flex}.brand{color:var(--ink);font-size:1.1rem;font-weight:700;text-decoration:none}.site-nav{flex-wrap:wrap;gap:4px 16px;font-size:.95rem;display:flex}.site-nav a{color:var(--ink-2);text-decoration:none}.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--ink);text-decoration:underline}main{padding:24px 0 48px}h1{margin:0 0 8px;font-size:clamp(1.6rem,1.2rem + 1.6vw,2.3rem);line-height:1.2}h2{margin:40px 0 12px;font-size:1.35rem}h3{margin:24px 0 8px;font-size:1.1rem}.lede{color:var(--ink-2);max-width:var(--measure);margin:0 0 24px;font-size:1.08rem}.prose{max-width:var(--measure)}.prose li+li{margin-top:4px}.breadcrumbs ol{color:var(--ink-2);flex-wrap:wrap;gap:4px;margin:0 0 12px;padding:0;font-size:.9rem;list-style:none;display:flex}.breadcrumbs li+li:before{content:"›";margin-right:4px}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:6px 8px}th{background:var(--surface-2);font-weight:600}.table-scroll{max-width:100%;overflow-x:auto}button,input,select,textarea{font:inherit;color:inherit}input,select,textarea{background:var(--surface);border:1px solid var(--line);border-radius:6px;min-width:0;padding:6px 8px}.btn{border:1px solid var(--line);background:var(--surface);cursor:pointer;border-radius:6px;align-items:center;gap:6px;padding:8px 14px;display:inline-flex}.btn:hover{background:var(--surface-2)}.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600}.btn-primary:hover{filter:brightness(1.08);background:var(--accent)}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.faq h3{margin-top:20px}.ad-slot{flex-direction:column;align-items:center;margin:32px 0;display:flex;overflow:hidden}.ad-slot .ad-label{letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);margin-bottom:4px;font-size:.7rem}.ad-slot ins{width:100%}.ad-preview{border:1px dashed var(--line);width:100%;color:var(--ink-2);place-items:center;font-size:.8rem;display:grid}.site-footer{border-top:1px solid var(--line);background:var(--surface);color:var(--ink-2);padding:24px 0 32px;font-size:.92rem}.site-footer nav{flex-wrap:wrap;gap:4px 16px;margin-bottom:8px;display:flex}.site-footer a{color:var(--ink-2)}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}@media print{.site-header,.site-footer,.ad-slot,.no-print,.breadcrumbs{display:none!important}body{color:#000;background:#fff}main{padding:0}}:root{--accent:#5b7a2f;--accent-ink:#fff;--todo-bg:#fff1c2;--todo-ink:#5c4400}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--accent:#a6c86a;--accent-ink:#15200a;--todo-bg:#4a3b0c;--todo-ink:#ffe9a8}}:root[data-theme=dark]{--accent:#a6c86a;--accent-ink:#15200a;--todo-bg:#4a3b0c;--todo-ink:#ffe9a8}.tool{margin:0 0 8px}.prose p,.prose ul,.prose ol{margin:0 0 14px}.prose h2+p,.prose h3+p{margin-top:0}.steps{padding-left:1.4em}.steps li{padding-left:4px}.steps li+li{margin-top:8px}.note{background:var(--surface-2);border-left:4px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;max-width:var(--measure);margin:16px 0;padding:12px 16px}.note>:last-child{margin-bottom:0}.example{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);max-width:var(--measure);margin:16px 0 24px;padding:16px}.example h3{margin-top:0}.example>:last-child{margin-bottom:0}.figures{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px 16px;margin:12px 0 0;padding:0;list-style:none;display:grid}.figures li{background:var(--surface-2);border-radius:6px;margin:0;padding:8px 10px}.figures .label{color:var(--ink-2);font-size:.85rem;display:block}.figures .value{font-variant-numeric:tabular-nums;font-size:1.1rem;font-weight:600;display:block}.cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin:16px 0 24px;padding:0;list-style:none;display:grid}.cards li{margin:0}.cards a{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);height:100%;color:var(--ink);padding:14px 16px;text-decoration:none;display:block}.cards a:hover{border-color:var(--accent)}.cards strong{color:var(--accent);margin-bottom:4px;display:block}.cards span{color:var(--ink-2);font-size:.95rem}.table-scroll{margin:12px 0 8px}.data-table{font-size:.95rem}.data-table caption{caption-side:top;text-align:left;padding:0 0 6px;font-weight:600}.data-table .num{font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}.table-note{color:var(--ink-2);max-width:var(--measure);font-size:.9rem}.sources{color:var(--ink-2);max-width:var(--measure);padding-left:1.2em;font-size:.9rem}.sources li+li{margin-top:2px}.math{font-variant-numeric:tabular-nums}.article-meta{color:var(--ink-2);margin:0 0 20px;font-size:.92rem}.todo{background:var(--todo-bg);color:var(--todo-ink);border-radius:4px;padding:1px 6px;font-weight:600}@media print{.cards{display:none}.example,.figures li{background:#fff;border-color:#999}}