.fb{margin-top:40px;padding:18px 20px 20px;background:var(--card, rgba(127, 127, 127, .08));border-radius:12px}.fb-h{font-size:1rem;margin:0 0 4px}.fb-sub{color:var(--muted, #6b7280);font-size:.85rem;margin:0 0 12px}.fb-text{width:100%;resize:vertical;background:var(--bg, #fff);color:var(--fg, inherit);border:1px solid var(--muted, #9aa3b2);border-radius:8px;padding:8px 10px;font:inherit}.fb-text:focus,.fb-name:focus{outline:2px solid var(--accent, #4c78a8);outline-offset:1px}.fb-row{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}.fb-name{flex:1;min-width:140px;max-width:240px;background:var(--bg, #fff);color:var(--fg, inherit);border:1px solid var(--muted, #9aa3b2);border-radius:8px;padding:6px 10px;font:inherit}.fb-send{background:var(--accent, #4c78a8);color:#fff;border:1px solid var(--accent, #4c78a8);border-radius:8px;padding:6px 16px;cursor:pointer;font:inherit}.fb-send:disabled{opacity:.5;cursor:default}.fb-note{font-size:.85rem;margin:8px 0 0}.fb-jump{position:fixed;top:14px;right:14px;z-index:10;background:var(--accent, #4c78a8);color:#fff;border:none;border-radius:999px;padding:7px 14px;font:inherit;font-size:.85rem;cursor:pointer;box-shadow:0 2px 8px #00000040}.fb-jump:hover{filter:brightness(1.1)}@media (max-width: 560px){.fb-jump{display:none}}.fb-ok{color:var(--accent, #4c78a8)}.fb-err{color:var(--accent2, #e4572e)}:root{--bg: #ffffff;--fg: #1a1a2e;--muted: #6b7280;--card: #f5f6f8;--line: #e2e5ea;--accent: #3574d4;--accent2: #e4572e}@media (prefers-color-scheme: dark){:root{--bg: #14161c;--fg: #e8eaf0;--muted: #9aa3b2;--card: #1e2129;--line: #2c313b}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.wrap{max-width:860px;margin:0 auto;padding:32px 20px 64px}h1{font-size:1.7rem;margin:0 0 4px}.sub{color:var(--muted);margin:0 0 24px}.h2{font-size:1rem;margin:26px 0 8px}a{color:var(--accent)}.src{font-size:.82rem;color:var(--muted);margin-top:28px}.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:20px 0}.tile{background:var(--card);border-radius:10px;padding:14px 16px}.tile .v{font-size:1.5rem;font-weight:650}.tile .l{color:var(--muted);font-size:.8rem}.tile .note{color:var(--muted);font-size:.76rem;margin-top:4px}.chart{width:100%;height:auto;background:var(--card);border-radius:10px}.grid{stroke:var(--muted);stroke-width:.5;opacity:.25}.zero{stroke:var(--muted);stroke-width:1;opacity:.6}.ylab{fill:var(--muted);font-size:10px;text-anchor:end}.xlab{fill:var(--muted);font-size:10px;text-anchor:middle}.tick{fill:var(--muted);font-size:11px}.axis{fill:var(--muted);font-size:11.5px}.guide{stroke:var(--muted);stroke-width:1;opacity:.5}.tipbox{fill:var(--bg);stroke:var(--muted);opacity:.97}.tiphd{fill:var(--fg);font-size:10px;font-weight:600}.tiprow{fill:var(--fg);font-size:10px}.tipval{text-anchor:end}.legend{display:flex;gap:16px;font-size:.85rem;color:var(--muted);margin:8px 0 0;flex-wrap:wrap}.legend b{display:inline-block;width:10px;height:10px;border-radius:2px;margin-inline-end:5px}.controls{display:flex;align-items:center;gap:12px;margin:18px 0;flex-wrap:wrap}.controls input[type=range]{flex:1;min-width:180px;accent-color:var(--accent)}button{background:var(--card);color:var(--fg);border:1px solid var(--muted);border-radius:8px;padding:5px 12px;cursor:pointer;font:inherit}button:disabled{opacity:.45;cursor:default}.seg.active{background:var(--accent);color:#fff;border-color:var(--accent)}.callout{background:var(--card);border-inline-start:3px solid var(--accent);border-radius:8px;padding:14px 18px;margin:22px 0}.callout ol,.callout ul{margin:0;padding-inline-start:20px}.callout li{margin:4px 0}details.explain{background:var(--card);border-radius:8px;padding:8px 14px;margin:0 0 20px}details.explain summary{cursor:pointer;font-weight:600;font-size:.92rem}details.explain p{font-size:.9rem;color:var(--fg);margin:10px 0 4px;max-width:76ch}.cap{font-size:.87rem;color:var(--muted);margin:10px 0 0;border-inline-start:2px solid var(--line);padding-inline-start:12px}.cap b{color:var(--fg)}.method{font-size:.88rem;color:var(--muted);max-width:76ch}.method b{color:var(--fg)}table.obs{width:100%;border-collapse:collapse;font-size:.84rem;margin:8px 0 4px}table.obs th{text-align:left;font-weight:600;color:var(--muted);border-bottom:1px solid var(--line);padding:6px 10px 6px 0;position:sticky;top:0;background:var(--bg)}table.obs td{padding:5px 10px 5px 0;border-bottom:1px solid var(--line);vertical-align:top}table.obs tr:hover td{background:var(--card)}.controls .seg{background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:8px;padding:6px 14px;cursor:pointer;font-size:.88rem}.controls .seg[aria-pressed=true]{background:var(--bg)}
