:root{--ink:#253247;--muted:#617089;--line:#e4e9f0;--blue:#245cc4;--pale:#edf3ff;--side:#f7f9fc}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font:15px/1.8 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button,a,input{touch-action:manipulation}:focus-visible{outline:3px solid #79a8ff;outline-offset:3px}.skip{position:fixed;top:-100px;background:white;z-index:20;padding:10px}.skip:focus{top:5px}.top{height:66px;position:fixed;inset:0 0 auto;z-index:5;border-bottom:1px solid var(--line);background:#fffffff2;backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:space-between;padding:0 30px}.brand{color:var(--ink);font-weight:750;letter-spacing:-.5px}.brand span{margin-left:12px;color:var(--muted);font-size:12px;font-weight:500;letter-spacing:1px}.toplinks{display:flex;align-items:center;gap:22px;font-size:13px}.menu{display:none;border:1px solid var(--line);border-radius:6px;background:white;padding:4px 12px}.sidebar{position:fixed;top:66px;bottom:0;left:0;width:285px;background:var(--side);border-right:1px solid var(--line);padding:25px 17px;overflow:auto}.searchlabel{font-size:12px;color:var(--muted);display:block;margin-bottom:5px}#search{width:100%;border:1px solid #d6deea;border-radius:7px;padding:9px 10px;background:white;color:var(--ink)}.navlabel{font-size:11px;letter-spacing:1px;font-weight:700;color:var(--muted);margin:23px 10px 8px}.navitem{display:flex;gap:11px;align-items:baseline;padding:7px 11px;border-radius:6px;color:#47566e;font-size:13px;line-height:1.55;margin:3px 0}.navitem span{font-variant-numeric:tabular-nums;color:#8793a6;font-size:11px;min-width:20px}.navitem.active{color:var(--blue);background:#e7eefc;font-weight:650}.navitem:hover{background:#edf1f7;text-decoration:none}.navitem[hidden]{display:none}.empty{font-size:13px;padding:12px;color:var(--muted)}.frame{margin:66px 0 0 285px;max-width:1270px;display:grid;grid-template-columns:minmax(0,790px) 190px;gap:50px;padding:48px 50px 30px}.main{min-width:0}.eyebrow{color:var(--blue);font-size:11px;letter-spacing:1.7px;font-weight:750;text-transform:uppercase}.crumb{font-size:12px;color:var(--muted);margin-bottom:26px}h1{font-size:34px;line-height:1.3;letter-spacing:-1px;margin:12px 0 10px;font-weight:750}h2{font-size:22px;line-height:1.4;letter-spacing:-.4px;margin:38px 0 16px;scroll-margin-top:90px}h3{font-size:16px;margin:0 0 7px}.subtitle{color:var(--muted);font-size:16px;margin:0 0 26px;line-height:1.6}.lead{font-size:16px;color:#546279;max-width:660px}.rule{border:0;border-top:1px solid var(--line);margin:30px 0}.stats{display:flex;gap:38px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;margin:27px 0 30px}.stats b{display:block;font-size:22px;color:var(--ink);line-height:1.3}.stats span{color:var(--muted);font-size:12px}.callout{border:1px solid #d9e5fb;border-left:3px solid #6290e2;background:#f7faff;border-radius:5px;padding:18px 21px;margin:24px 0;color:#4a5e7b}.callout p{margin:5px 0}.small{font-size:12px;color:var(--muted)}.path{border:1px solid var(--line);border-radius:9px;overflow:hidden}.path a{display:flex;gap:16px;align-items:center;padding:17px 20px;border-bottom:1px solid var(--line);color:var(--ink)}.path a:last-child{border:0}.path a:hover{background:var(--side);text-decoration:none}.path .num{font-size:11px;color:var(--blue);border:1px solid #d8e3f8;border-radius:5px;width:32px;height:32px;display:grid;place-items:center;flex-shrink:0}.path strong{font-size:14px;display:block}.path small{display:block;color:var(--muted);font-size:12px}.arrow{margin-left:auto;color:var(--muted)}.resource{border:1px solid var(--line);border-radius:7px;display:flex;gap:15px;padding:17px 18px;margin:10px 0;color:var(--ink);align-items:flex-start}.resource:hover{border-color:#afc7ef;background:#fafcff;text-decoration:none}.kind{font-size:10px;font-weight:750;letter-spacing:.5px;color:var(--blue);background:var(--pale);padding:3px 6px;min-width:44px;text-align:center;border-radius:4px;margin-top:2px}.resource strong{display:block;font-size:14px;line-height:1.55;font-weight:600;overflow-wrap:anywhere}.resource small{font-size:11px;color:var(--muted)}.exercise{border:1px solid var(--line);border-radius:8px;padding:19px 21px}.exercise p{margin:5px 0}.tag{display:inline-block;background:var(--side);padding:3px 9px;border-radius:5px;color:var(--muted);font-size:11px;margin:0 4px 5px 0}.toc{font-size:12px;position:sticky;top:107px;align-self:start;border-left:1px solid var(--line);padding-left:18px}.toc strong{font-size:11px;letter-spacing:1px}.toc a{display:block;margin:12px 0;color:var(--muted)}.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:42px 0 25px}.prevnext a{border:1px solid var(--line);border-radius:7px;padding:14px 16px;font-size:13px;line-height:1.5}.prevnext small{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}.prevnext .next{text-align:right}.footer{font-size:11px;color:#7e8aa0;border-top:1px solid var(--line);padding-top:18px;margin-top:30px}.calendar{padding:14px 0;border-bottom:1px solid var(--line)}.calendar time{display:block;font-size:11px;color:var(--muted)}.calendar strong{font-size:14px}.calendar p{margin:3px 0;font-size:12px;color:var(--muted)}.searchstatus{font-size:11px;color:var(--muted);padding:4px 2px;min-height:24px}.notice{padding:8px 12px;background:#fff9ec;border:1px solid #f0e3be;border-radius:5px;font-size:12px}.noscript{display:block;padding:8px;color:#715817;background:#fff9ec}body.menu-open{overflow:hidden}@media(min-width:1400px){.frame{margin-left:310px;padding-left:64px}.sidebar{width:310px}}@media(max-width:1150px){.frame{grid-template-columns:minmax(0,1fr);padding:35px 38px}.toc{display:none}}@media(max-width:760px){.top{height:58px;padding:0 18px}.brand{font-size:15px}.brand span{display:none}.toplinks{gap:14px}.menu{display:block}.sidebar{top:58px;width:min(320px,90vw);z-index:8;transform:translateX(-100%);transition:transform .15s;box-shadow:10px 0 40px #14274416}.sidebar.open{transform:translateX(0)}.frame{display:block;margin:58px 0 0;padding:27px 22px}.crumb{margin-bottom:20px}h1{font-size:28px}.subtitle{font-size:14px}.stats{gap:24px}.stats b{font-size:20px}.resource{padding:14px 12px;gap:10px}.path a{padding:14px 13px}.prevnext{gap:8px}.prevnext a{padding:12px}.veil{position:fixed;inset:58px 0 0;background:#13203955;z-index:7}.veil[hidden]{display:none}.toplinks>a{font-size:12px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}@media print{.top,.sidebar,.toc,.prevnext{display:none}.frame{margin:0;display:block;padding:0}.resource{break-inside:avoid}a{color:#111}}
.notfound{padding:40px}

.slide-card{border:1px solid var(--line);border-radius:8px;margin:14px 0;overflow:hidden}
.slide-card .resource{border:0;border-radius:0;margin:0}
.slide-controls{display:flex;flex-wrap:wrap;gap:10px;padding:0 18px}
.slide-controls button{border:1px solid #cad8ed;border-radius:6px;background:var(--pale);color:var(--blue);padding:7px 12px;cursor:pointer;font-size:13px}
.slide-controls button:hover{background:#dfeaff}
.slide-controls button[hidden],.slide-viewer[hidden]{display:none}
.preview-note{padding:0 18px;margin:10px 0 14px}
.slide-viewer{border-top:1px solid var(--line);background:var(--side)}
.slide-viewer iframe{display:block;width:100%;height:75vh;min-height:480px;border:0;background:white}
@media(max-width:760px){.slide-controls{padding:0 12px}.preview-note{padding:0 12px}.slide-viewer iframe{height:70vh;min-height:420px}}
@media print{.slide-controls,.slide-viewer,.preview-note{display:none}}