:root{
  --canvas:#f5f5f5;
  --paper:#ffffff;
  --surface:#fafafa;
  --ink:#0a0a0a;
  --ink-soft:#171717;
  --muted:#737373;
  --hair:#e5e5e5;
  --ember:#e7000b;
  --shadow:0 0 0 1px rgba(23,23,23,.05),0 1px 3px rgba(0,0,0,.10),0 1px 2px -1px rgba(0,0,0,.10);
  --r-card:24px;
  --r-pill:18px;
  --max:1280px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--canvas);color:var(--ink);
  font-family:Geist,Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:14px;line-height:1.43;
  font-feature-settings:"ss01" 1,"cv11" 1;
}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
button,input,select{font:inherit}
img,svg{display:block}
.shell{max-width:var(--max);margin:0 auto;padding:0 24px}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(245,245,245,.88);backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(229,229,229,.85)
}
.nav{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.025em}
.brand-mark{
  width:30px;height:30px;border-radius:10px;background:var(--ink);color:var(--paper);
  display:grid;place-items:center;font-size:12px;font-weight:600
}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.nav-links a{padding:8px 10px;border-radius:var(--r-pill);color:var(--muted);font-weight:500}
.nav-links a:hover,.nav-links a[aria-current="page"]{background:var(--paper);color:var(--ink);text-decoration:none}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--ink);color:#fafafa;font-weight:500
}
.nav-cta:hover{text-decoration:none;background:var(--ink-soft)}
.hero{padding:80px 0 48px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.65fr);gap:24px;align-items:stretch}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;text-transform:uppercase;
  font-size:12px;line-height:1.33;letter-spacing:.05em;color:var(--muted);font-weight:500
}
.dot{width:7px;height:7px;border-radius:999px;background:var(--ink)}
h1,h2,h3{margin:0;letter-spacing:-.025em}
h1{font-size:clamp(40px,6vw,64px);line-height:1.02;letter-spacing:-.05em;font-weight:600;max-width:900px}
h2{font-size:clamp(28px,4vw,36px);line-height:1.11;font-weight:600}
h3{font-size:20px;line-height:1.25;font-weight:600}
.lede{font-size:18px;line-height:1.56;color:var(--muted);max-width:760px;margin:20px 0 0}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.btn{
  min-height:40px;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);font-weight:500;border:0;cursor:pointer
}
.btn-primary{background:var(--ink);color:#fafafa}
.btn-secondary{background:var(--paper);color:var(--ink);box-shadow:0 0 0 1px var(--hair)}
.btn-ghost{background:var(--canvas);color:var(--ink)}
.btn:hover{text-decoration:none;filter:brightness(.98)}
.card{
  background:var(--paper);border:1px solid var(--hair);border-radius:var(--r-card);
  box-shadow:var(--shadow);padding:20px
}
.card-muted{background:var(--surface)}
.hero-card{display:flex;flex-direction:column;justify-content:space-between;min-height:100%}
.kicker{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:500}
.big-stat{font-size:48px;line-height:1.1;letter-spacing:-.05em;font-weight:600;margin-top:8px}
.stat-note{color:var(--muted);margin-top:6px}
.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:20px}
.mini{padding:14px;border-radius:18px;background:var(--canvas)}
.mini strong{display:block;font-size:18px;letter-spacing:-.025em}
.mini span{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.section{padding:32px 0 56px}
.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:20px}
.section-head p{max-width:680px;color:var(--muted);margin:8px 0 0}
.toolbar{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:12px;
  background:var(--paper);border:1px solid var(--hair);border-radius:24px;box-shadow:var(--shadow);margin-bottom:12px
}
.search{
  flex:1 1 260px;min-height:38px;border:0;outline:0;background:var(--canvas);
  border-radius:var(--r-pill);padding:8px 12px;color:var(--ink)
}
.select{
  min-height:38px;border:0;outline:0;background:var(--canvas);
  border-radius:var(--r-pill);padding:8px 30px 8px 12px;color:var(--ink)
}
.table-card{padding:0;overflow:hidden}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:980px}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--hair);vertical-align:middle}
th{
  position:sticky;top:0;background:var(--surface);font-size:12px;text-transform:uppercase;
  letter-spacing:.05em;color:var(--muted);font-weight:500
}
tbody tr:hover{background:#fafafa}
td strong{font-weight:600}
.course-link{text-decoration:underline;text-decoration-color:#d4d4d4;text-underline-offset:3px}
.badge{
  display:inline-flex;align-items:center;justify-content:center;padding:3px 8px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;white-space:nowrap
}
.badge-dark{background:var(--ink-soft);color:#fafafa}
.badge-soft{background:var(--canvas);color:var(--ink-soft)}
.badge-outline{border:1px solid var(--hair);background:transparent;color:var(--ink)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.feature-card h3{margin-top:18px}
.feature-card p{color:var(--muted);margin:8px 0 0}
.icon{
  width:38px;height:38px;border-radius:18px;background:var(--canvas);display:grid;place-items:center;
  border:1px solid var(--hair)
}
.icon svg{width:18px;height:18px;stroke:var(--ink);fill:none;stroke-width:1.7}
.callout{display:flex;gap:16px;align-items:flex-start}
.callout p{margin:4px 0 0;color:var(--muted)}
.prose{max-width:820px}
.prose h2{margin-top:48px;margin-bottom:12px}
.prose h3{margin-top:28px;margin-bottom:8px}
.prose p,.prose li{font-size:16px;line-height:1.6;color:#262626}
.prose ul,.prose ol{padding-left:22px}
.prose .card p{font-size:14px;color:var(--muted)}
.breadcrumbs{padding-top:32px;color:var(--muted);font-size:13px}
.breadcrumbs span{margin:0 6px}
.page-hero{padding:34px 0 28px}
.page-hero h1{font-size:clamp(36px,5vw,52px);max-width:920px}
.page-hero p{font-size:16px;color:var(--muted);max-width:760px;margin-top:14px}
.fact-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:20px}
.fact{background:var(--paper);border:1px solid var(--hair);border-radius:24px;padding:18px;box-shadow:var(--shadow)}
.fact-label{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.fact-value{font-size:18px;font-weight:600;letter-spacing:-.025em;margin-top:8px}
.rule{border:0;border-top:1px solid var(--hair);margin:0}
.faq{display:grid;gap:8px}
.faq details{background:var(--paper);border:1px solid var(--hair);border-radius:24px;padding:18px 20px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:600;font-size:16px}
.faq p{color:var(--muted);margin:12px 0 0}
.footer{padding:48px 0 56px;color:var(--muted)}
.footer-grid{display:flex;justify-content:space-between;gap:24px;align-items:center;border-top:1px solid var(--hair);padding-top:24px}
.footer a{color:var(--ink)}
.empty{padding:36px;text-align:center;color:var(--muted)}
.note{font-size:12px;color:var(--muted)}
.mobile-only{display:none}
@media(max-width:900px){
  .hero{padding-top:48px}
  .hero-grid,.grid-3,.grid-2{grid-template-columns:1fr}
  .fact-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav-links a:not(.nav-cta){display:none}
  .section-head{align-items:flex-start;flex-direction:column}
}
@media(max-width:600px){
  .shell{padding:0 16px}
  h1{font-size:40px}
  .hero{padding-bottom:32px}
  .fact-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fact{padding:14px}
  .fact-value{font-size:16px}
  .footer-grid{align-items:flex-start;flex-direction:column}
  .mobile-only{display:block}
}

/* ---- v2 additions ---- */
body{font-size:15px}
.section.tight{padding:0 0 24px}
.answer{background:var(--ink);color:#fafafa;border-color:var(--ink)}
.answer .kicker{color:#a3a3a3}
.answer ul{margin:12px 0 0;padding-left:20px;display:grid;gap:8px}
.answer li{font-size:16px;line-height:1.55}
.answer a{color:#fff;text-decoration:underline;text-underline-offset:3px}
.answer .note{color:#a3a3a3;margin:14px 0 0}
.picks .pick h3{margin-top:8px;font-size:18px}
.pick p{color:#404040;margin:10px 0 0;font-size:15px;line-height:1.55}
.pick .note{color:var(--muted);font-size:13px}
.pick-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.cards{margin:16px 0 8px}
.mini-course h3{font-size:17px}
.mini-course p{margin:6px 0 0}
.prose .mini-course p{font-size:15px;color:#404040}
.prose .mini-course p.note{font-size:13px;color:var(--muted)}
.table-note{margin-top:10px;max-width:900px}
.course-grid{grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);align-items:start;gap:32px}
.course-grid .prose h2:first-child{margin-top:0}
.sticky{position:sticky;top:84px}
table.attr{min-width:0}
table.attr td{padding:10px 8px;font-size:13px}
table.attr td.note{font-size:12px}
table.vs{min-width:0}
table.vs th,table.vs td{padding:10px 10px}
.choose{margin:16px 0}
.choose .card p{font-size:15px}
.cols{columns:2;column-gap:32px}
.cols li{break-inside:avoid;margin-bottom:6px}
.gloss dt{font-weight:600;font-size:18px;margin-top:22px;letter-spacing:-.02em}
.gloss dd{margin:6px 0 0;font-size:16px;line-height:1.6;color:#262626}
.sources li{word-break:break-word;margin-bottom:8px}
.footer-links{text-align:right}
.breadcrumbs .here{color:var(--ink)}
.prose a,.faq a,.section-head a,.pick a:not(.course-link){text-decoration:underline;text-decoration-color:#a3a3a3;text-underline-offset:3px}
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;height:36px;padding:0 14px;display:flex;align-items:center;border-radius:var(--r-pill);background:var(--paper);box-shadow:0 0 0 1px var(--hair);font-weight:500}
.mnav summary::-webkit-details-marker{display:none}
.mnav-panel{position:absolute;right:0;top:44px;background:var(--paper);border:1px solid var(--hair);border-radius:18px;box-shadow:var(--shadow);padding:8px;display:grid;min-width:200px}
.mnav-panel a{padding:10px 12px;border-radius:12px}
.mnav-panel a:hover{background:var(--canvas);text-decoration:none}
@media(max-width:900px){
  .nav-links{display:none}
  .mnav{display:block}
  .course-grid{grid-template-columns:1fr}
  .sticky{position:static}
  .cols{columns:1}
  .footer-links{text-align:left}
}
@media(max-width:600px){
  h1{font-size:34px}
  .page-hero h1{font-size:32px}
  .big-stat{font-size:40px}
  .answer li{font-size:15px}
}

@media(max-width:600px){.breadcrumbs{padding-top:18px}.page-hero{padding-top:20px}}
/* ---- v2.1 template components: charts, meters, ring, calendar, toggles, slider, command palette ---- */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.charts{margin-top:12px;align-items:start}
.stack{display:grid;gap:12px}
.stat .stat-value{font-size:36px;line-height:1.1;letter-spacing:-.04em;font-weight:600;margin-top:8px}
.stat .stat-note{font-size:13px;margin-top:10px}
.meter{height:8px;border-radius:999px;background:var(--canvas);margin-top:12px;overflow:hidden;box-shadow:inset 0 0 0 1px var(--hair)}
.meter span{display:block;height:100%;background:var(--ink);border-radius:999px}
figure.chart{margin:0}
.chart figcaption{margin-bottom:16px}
.chart-title{font-size:16px;font-weight:600;letter-spacing:-.02em}
.chart-sub{color:var(--muted);font-size:13px;margin-top:4px;line-height:1.45}
.hbar{display:grid;gap:10px;padding-bottom:4px;position:relative}
.hbar-row{display:grid;grid-template-columns:minmax(110px,38%) 1fr;gap:12px;align-items:center}
.hbar-label{font-size:13px;color:var(--ink-soft);line-height:1.3}
.hbar-track{position:relative;height:18px;margin-right:64px}
.hbar-bar{position:absolute;left:0;top:0;height:18px;background:var(--ink);border-radius:0 4px 4px 0;cursor:default;outline-offset:2px}
.hbar-bar:hover,.hbar-bar:focus-visible{background:#404040}
.hbar-val{position:absolute;top:0;line-height:18px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.hbar-axis{position:relative;height:16px;margin:2px 64px 0 calc(38% + 12px);border-top:1px solid var(--hair)}
.hbar-axis span{position:absolute;top:4px;font-size:11px;color:var(--muted);transform:translateX(-50%)}
.hbar-axis span:first-child{transform:none}
.hbar-axis span:last-child{transform:translateX(-100%)}
.strip{position:relative;margin:4px 6px 0}
.strip-base{position:absolute;left:0;right:0;bottom:6px;border-top:1px solid var(--hair)}
.dot-mark{position:absolute;width:10px;height:10px;margin-left:-5px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 2px var(--paper);cursor:default}
.dot-mark::after{content:"";position:absolute;inset:-7px;border-radius:50%}
.dot-mark:hover,.dot-mark:focus-visible{transform:scale(1.35);outline:none}
.dot-mark.hl{background:var(--ember);width:14px;height:14px;margin-left:-7px;z-index:2}
.strip-axis{position:relative;height:22px;margin:0 6px}
.strip-axis .tick{position:absolute;top:0;transform:translateX(-50%);font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.strip-axis .tick i{display:block;width:1px;height:5px;background:var(--hair);margin:0 auto 3px}
.strip-legend{display:flex;gap:16px;font-size:12px;color:var(--muted);margin-top:6px}
.k-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--ink);margin-right:6px;vertical-align:-1px}
.k-dot.hl{background:var(--ember)}
.line{display:grid;grid-template-columns:40px 1fr;gap:8px;height:170px}
.line-y{position:relative}
.line-y span{position:absolute;right:0;transform:translateY(-50%);font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.line-plot{position:relative;margin-right:44px}
.line-grid i{position:absolute;left:0;right:0;border-top:1px solid var(--hair)}
.line-svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.line-path{fill:none;stroke:var(--ink);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.line-area{fill:var(--ink);opacity:.08}
.line-dot{position:absolute;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 2px var(--paper);cursor:default}
.line-dot::after{content:"";position:absolute;inset:-8px;border-radius:50%}
.line-dot:hover,.line-dot:focus-visible{transform:scale(1.3);outline:none}
.line-end{position:absolute;left:calc(100% + 8px);transform:translateY(-50%);font-size:12px;font-weight:600}
.line-x{display:flex;justify-content:space-between;margin:6px 44px 0 48px;font-size:11px;color:var(--muted)}
.table-view{margin-top:14px;border-top:1px solid var(--hair);padding-top:10px}
.table-view summary{cursor:pointer;font-size:12px;color:var(--muted);font-weight:500}
table.mini-table{min-width:0;margin-top:8px}
table.mini-table th,table.mini-table td{padding:8px 10px;font-size:13px}
table.mini-table th{position:static}
.ring{position:relative;width:132px;height:132px;margin:14px auto 6px}
.ring svg{width:100%;height:100%}
.ring-track{fill:none;stroke:var(--canvas);stroke-width:10}
.ring-fill{fill:none;stroke:var(--ink);stroke-width:10;stroke-linecap:round}
.ring-center{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ring-center strong{font-size:30px;letter-spacing:-.04em;line-height:1}
.ring-center small{font-size:14px;color:var(--muted);font-weight:500}
.ring-center span{font-size:11px;color:var(--muted);margin-top:4px;max-width:96px;line-height:1.25}
.ring-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.cals{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.cal-head{font-weight:600;font-size:14px;margin-bottom:8px}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:2px;text-align:center}
.cal-grid span{font-size:12px;line-height:28px;border-radius:10px;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.cal-grid.dow span{color:var(--muted);font-size:11px;line-height:22px}
.cal-grid .ev{background:var(--ink);color:#fafafa;font-weight:600;cursor:default}
.cal-list{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px;font-size:14px}
.prose .cal-list li{font-size:14px}
.toolbar-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.toggle-group{display:inline-flex;background:var(--paper);border:1px solid var(--hair);border-radius:var(--r-pill);padding:3px;gap:2px;box-shadow:var(--shadow);flex-wrap:wrap}
.toggle-group button{border:0;background:transparent;border-radius:14px;padding:6px 12px;font-weight:500;color:var(--muted);cursor:pointer;font-size:13px}
.toggle-group button:hover{color:var(--ink)}
.toggle-group button.on{background:var(--ink);color:#fafafa}
.budget{display:flex;align-items:center;gap:12px;background:var(--paper);border:1px solid var(--hair);border-radius:var(--r-pill);padding:7px 14px;box-shadow:var(--shadow);font-size:13px;color:var(--muted)}
.budget strong{color:var(--ink);font-weight:600}
.budget input[type=range]{-webkit-appearance:none;appearance:none;width:160px;height:6px;border-radius:999px;background:linear-gradient(var(--ink),var(--ink)) 0/var(--fill,100%) 100% no-repeat,var(--canvas);box-shadow:inset 0 0 0 1px var(--hair);cursor:pointer}
.budget input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--paper);border:2px solid var(--ink);box-shadow:var(--shadow)}
.budget input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--paper);border:2px solid var(--ink)}
.search-trigger{display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 8px 0 12px;border:0;border-radius:var(--r-pill);background:var(--paper);box-shadow:0 0 0 1px var(--hair);color:var(--muted);cursor:pointer;font-size:13px;margin-left:auto;margin-right:8px}
.search-trigger svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}
.search-trigger kbd{font-family:"Geist Mono",ui-monospace,monospace;font-size:11px;background:var(--canvas);border:1px solid var(--hair);border-radius:6px;padding:1px 6px;color:var(--ink-soft)}
.cmdk{border:0;padding:0;background:transparent;width:min(560px,calc(100vw - 32px));margin-top:12vh}
.cmdk::backdrop{background:rgba(10,10,10,.28);backdrop-filter:blur(2px)}
.cmdk-box{background:var(--paper);border:1px solid var(--hair);border-radius:24px;box-shadow:0 16px 48px rgba(0,0,0,.18);overflow:hidden}
.cmdk input{width:100%;border:0;outline:0;padding:16px 20px;font-size:16px;border-bottom:1px solid var(--hair);background:var(--paper)}
.cmdk-list{list-style:none;margin:0;padding:8px;max-height:52vh;overflow:auto}
.cmdk-list a{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:14px;font-size:14px}
.cmdk-list a small{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:45%}
.cmdk-list li.on a,.cmdk-list a:hover{background:var(--canvas);text-decoration:none}
.cmdk-list .empty{padding:14px;color:var(--muted);text-align:center}
.cmdk-foot{padding:10px 16px;border-top:1px solid var(--hair);font-size:12px;color:var(--muted)}
.chart-tip{position:fixed;z-index:100;pointer-events:none;background:var(--ink);color:#fafafa;font-size:12px;font-weight:500;padding:6px 10px;border-radius:10px;max-width:280px;box-shadow:0 4px 16px rgba(0,0,0,.2)}
@media(max-width:1000px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.search-trigger span,.search-trigger kbd{display:none}.search-trigger{padding:0 11px}}
@media(max-width:600px){
  .hbar-row{grid-template-columns:1fr;gap:4px}
  .hbar-axis{margin-left:0}
  .stat .stat-value{font-size:28px}
  .budget{width:100%;justify-content:space-between}
  .budget input[type=range]{width:120px}
  .toggle-group{width:100%;justify-content:space-between}
  .toggle-group button{padding:6px 8px}
}
.cmdk input::-webkit-search-cancel-button{-webkit-appearance:none}