:root{--fg:#1d2433;--muted:#5d6779;--bg:#f7f8fb;--card:#fff;--line:#e1e5ee;--accent:#4f46e5;--warn:#c77800;--bad:#c62828;--ok:#2e7d32;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--fg:#e8ebf2;--muted:#9aa3b5;--bg:#11151d;--card:#1a1f2b;--line:#2b3242;--accent:#7aa2ff}}html[data-theme=light]{--fg:#1d2433;--muted:#5d6779;--bg:#f7f8fb;--card:#fff;--line:#e1e5ee;--accent:#4f46e5;color-scheme:light}html[data-theme=dark]{--fg:#e8ebf2;--muted:#9aa3b5;--bg:#11151d;--card:#1a1f2b;--line:#2b3242;--accent:#7aa2ff;color-scheme:dark}*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}a{color:var(--accent)}.wrap{max-width:1100px;margin:0 auto;padding:0 16px}.site-header{background:var(--card);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:56px}.brand{font-weight:800;font-size:1.2rem;text-decoration:none;color:var(--fg)}.brand{flex-shrink:0}.site-header nav{display:flex;gap:14px;flex-wrap:nowrap;overflow-x:auto;white-space:nowrap;min-width:0;scrollbar-width:none;font-size:.95rem}.site-header nav::-webkit-scrollbar{display:none}@media(max-width:720px){.site-header .wrap{gap:12px}.site-header nav{gap:12px;font-size:.9rem;padding-right:14px;-webkit-mask-image:linear-gradient(90deg,#000 85%,transparent);mask-image:linear-gradient(90deg,#000 85%,transparent)}}.site-header nav a{text-decoration:none;color:var(--muted)}h1{font-size:1.9rem;margin:20px 0 4px;line-height:1.2}.lede{color:var(--muted);margin:0 0 16px}.crumbs{font-size:.85rem;color:var(--muted);margin-top:14px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.panel{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 14px}.toolbar,.top-bar,.tools{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:8px 0 16px}button,.primary{font:inherit;font-size:.88rem;padding:6px 10px;border:1px solid var(--line);background:var(--card);color:var(--fg);border-radius:8px;cursor:pointer}button:hover{border-color:var(--accent)}button.primary,.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.danger:hover{border-color:var(--bad);color:var(--bad)}.muted{color:var(--muted)}.prose{max-width:760px;margin:24px 0}.prose h2{font-size:1.3rem;margin-top:28px}.faq details{border-bottom:1px solid var(--line);padding:8px 0}.faq summary{cursor:pointer;font-weight:600}.related{columns:2}.ad-slot{margin:20px 0;min-height:100px}.site-footer{border-top:1px solid var(--line);margin-top:40px;padding:20px 0;font-size:.9rem;background:var(--card)}.tool-links{display:flex;flex-wrap:wrap;gap:6px 16px}@media print{.site-header,.site-footer,.ad-slot{display:none!important}}[hidden]{display:none!important}:root{--dot:10px}.toolbar label{display:flex;gap:6px;align-items:center;font-size:.9rem}.br-tabs{display:flex;gap:4px;flex-wrap:wrap;margin-right:auto}.br-tab[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.br textarea,.br input:not([type=range]){font:inherit;padding:7px 9px;border:1px solid var(--line);border-radius:7px;background:var(--bg);color:var(--fg);width:100%}.br-label{display:block;font-weight:600;font-size:.9rem;margin:0 0 4px}.br-uni{font-size:2rem;line-height:1.3;word-break:break-all;margin:10px 0;letter-spacing:.05em}.br-cells{display:flex;flex-wrap:wrap;gap:10px 6px;margin:8px 0}.br-c{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:calc(var(--dot) * 2.6)}.br-c small{font-size:.75rem;color:var(--muted);min-height:1.1em}.br-cell{display:grid;grid-template-columns:repeat(2,var(--dot));grid-template-rows:repeat(3,var(--dot));grid-auto-flow:column;gap:calc(var(--dot) * .45);padding:calc(var(--dot) * .4);border:1px solid var(--line);border-radius:6px;background:var(--card)}.br-cell i{width:var(--dot);height:var(--dot);border-radius:50%;border:1px solid var(--line)}.br-cell i.on{background:var(--fg);border-color:var(--fg)}.br-big{--dot:26px;justify-content:center}.br-warn{color:var(--warn);font-size:.88rem}.br-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:8px}.br-actions input{width:4em!important;text-align:center;font-size:1.3rem}.br-pad{display:grid;grid-template-columns:repeat(2,52px);gap:6px;margin:10px 0}.br-pd{height:52px;border-radius:50%;font-weight:700}.br-pd[aria-pressed=true]{background:var(--fg);color:var(--bg)}.br-text{font-size:1.3rem;min-height:1.5em;margin:0}.br-chart{margin-top:12px}.br-chart summary{font-weight:700;cursor:pointer}.br-h{font-size:1rem;margin:14px 0 6px}.br-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(64px,1fr));gap:8px;margin-top:8px}.br-card{display:flex;flex-direction:column;align-items:center;gap:2px;border:1px solid var(--line);border-radius:8px;padding:6px 2px}.br-card b{font-size:1.05rem}.br-card small{color:var(--muted);font-size:.7rem}.br-uni-sm{font-size:1.6rem;line-height:1}@media print{.site-header,.site-footer,.prose,.ad-slot,.lede,h1,.crumbs,.toolbar,.br-actions,.tip-nudge,[data-pane=from],[data-pane=practice]{display:none!important}body{background:#fff;color:#000}.br-cell i.on{background:#000}}