@font-face{font-family:"Instrument Serif";font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/InstrumentSerif-Regular.woff2) format("woff2")}
@font-face{font-family:"Instrument Serif";font-style:italic;font-weight:400;font-display:swap;src:url(/assets/fonts/InstrumentSerif-Italic.woff2) format("woff2")}
@font-face{font-family:"Bricolage";font-style:normal;font-weight:200 800;font-stretch:75% 100%;font-display:swap;src:url(/assets/fonts/BricolageGrotesque.woff2) format("woff2")}
@font-face{font-family:"Newsreader";font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/fonts/Newsreader.woff2) format("woff2")}
@font-face{font-family:"Newsreader";font-style:italic;font-weight:200 800;font-display:swap;src:url(/assets/fonts/Newsreader-Italic.woff2) format("woff2")}
:root{--paper:#fff;--mist:#f4f3f0;--mist-2:#e9e7e2;--ink:#181818;--ink-soft:#4b4b4b;--muted:#67655f;--verm:#a82000;--maroon:#6e0a0a;--ok:#1e6b3a;--okbg:#e6f2ea;--nobg:#fbe9e4;
 --display:"Instrument Serif",Georgia,serif;--serif:"Newsreader","Iowan Old Style",Georgia,serif;--sans:"Bricolage","Helvetica Neue",Arial,sans-serif;
 --sh:20 18% 18%;--e1:0 1px 1px hsl(var(--sh)/.06),0 2px 4px hsl(var(--sh)/.05),0 6px 14px hsl(var(--sh)/.05),0 16px 32px -12px hsl(var(--sh)/.08);
 --e2:0 2px 2px hsl(var(--sh)/.05),0 8px 16px hsl(var(--sh)/.07),0 24px 48px -12px hsl(var(--sh)/.16);--e3:0 4px 6px hsl(var(--sh)/.06),0 24px 48px -8px hsl(var(--sh)/.22),0 60px 100px -30px hsl(var(--sh)/.3);
 --ease-out:cubic-bezier(.23,1,.32,1);--ease-sheet:cubic-bezier(.32,.72,0,1);--ease-spring:cubic-bezier(.34,1.3,.3,1);
 box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
*,*::before,*::after{box-sizing:inherit;border:0;margin:0;padding:0}
html{scroll-padding-top:90px;scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.55;-webkit-font-smoothing:antialiased;font-variation-settings:"opsz" 16}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit;background:none}
:focus-visible{outline:3px solid var(--verm);outline-offset:3px;border-radius:6px}
p{text-wrap:pretty}.num{font-variant-numeric:tabular-nums lining-nums}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.d{font-family:var(--display);font-weight:400;letter-spacing:-.015em;line-height:.98;text-wrap:balance}.d em{font-style:italic;color:var(--verm)}
h1.d{font-size:clamp(40px,6vw,76px)}h2.d{font-size:clamp(30px,3.6vw,48px)}
.label{font-family:var(--sans);font-weight:600;font-size:13px;color:var(--verm);font-variation-settings:"wdth" 90}
.hint{font-family:var(--sans);font-size:13px;color:var(--muted);font-variation-settings:"wdth" 90}
.btn{--face:var(--verm);--edge:var(--maroon);--fg:#fff;display:inline-flex;align-items:center;justify-content:center;gap:.5em;font-family:var(--sans);font-weight:600;font-size:15px;padding:13px 22px 12px;border-radius:12px;cursor:pointer;min-height:48px;
 background:linear-gradient(180deg,rgba(255,255,255,.14),rgba(255,255,255,0) 55%),var(--face);color:var(--fg);box-shadow:0 5px 0 var(--edge),0 12px 22px -6px rgba(0,0,0,.28),inset 0 1px 0 rgba(255,255,255,.22);
 transition:transform 160ms var(--ease-out),box-shadow 160ms var(--ease-out);user-select:none;-webkit-tap-highlight-color:transparent;white-space:nowrap;text-decoration:none}
.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(5px);box-shadow:0 0 0 var(--edge),0 3px 8px -2px rgba(0,0,0,.25);transition-duration:90ms}
.btn.light{--face:#fff;--edge:#d9d8d3;--fg:var(--ink);background:linear-gradient(180deg,#fff,#f7f7f5)}
.btn.small{font-size:14px;padding:10px 16px 9px;border-radius:10px;min-height:44px}.btn[disabled]{opacity:.5;cursor:default;pointer-events:none}
.btn.wide{width:100%}
header.site{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:rgba(255,255,255,.9);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px)}
header.site .bar{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
header.site .brand img{height:44px;width:auto}
header.site nav{display:flex;gap:22px;font-family:var(--sans);font-size:14px;font-weight:500;color:var(--ink-soft)}
header.site nav a:hover,header.site nav a[aria-current]{color:var(--verm)}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-family:var(--sans);font-size:13px;color:var(--muted);margin:22px 0 0;list-style:none;font-variation-settings:"wdth" 90}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--mist-2)}
.crumbs a:hover{color:var(--verm)}
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--sans);font-size:12.5px;font-weight:600;padding:5px 10px;border-radius:99px;background:var(--mist);color:var(--ink-soft);font-variation-settings:"wdth" 90;white-space:nowrap}
.chip.yr{color:var(--verm)}
/* question block (browse + static pages) */
.q{padding:26px 0 22px;position:relative}
.q+.q{box-shadow:0 -1px 0 var(--mist-2)}
.q .tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px;align-items:center}
.q .stem{white-space:pre-line;font-size:19px;line-height:1.5;font-weight:500;max-width:46em}
.q .stem a{color:inherit}
.opts{list-style:none;display:grid;gap:8px;margin:14px 0 0;max-width:46em}
.opt{display:flex;gap:14px;align-items:baseline;text-align:left;width:100%;padding:12px 14px;border-radius:12px;background:#fff;cursor:pointer;font-size:17px;line-height:1.4;min-height:48px;
 box-shadow:0 3px 0 var(--mist-2),0 6px 14px -6px rgba(0,0,0,.12);transition:transform 160ms var(--ease-out),box-shadow 160ms var(--ease-out),background 200ms ease}
.opt:hover{transform:translateY(-1px)}.opt:active{transform:translateY(3px) scale(.985);box-shadow:none;transition-duration:90ms}
.opt .k{font-family:var(--sans);font-weight:700;font-size:13px;color:var(--muted);flex:none;width:16px}
.opt.right{background:var(--ok);color:#fff;box-shadow:0 3px 0 #123f22}.opt.wrong{background:var(--verm);color:#fff;box-shadow:0 3px 0 var(--maroon)}
.opt.right .k,.opt.wrong .k{color:#fff}.opt.dim{opacity:.45}
.opt.shake{animation:shake 240ms ease-in-out}@keyframes shake{0%,100%{transform:none}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.tick{width:18px;height:18px;flex:none;align-self:center;margin-left:auto}.tick path{stroke:#fff;stroke-width:3;fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:24;stroke-dashoffset:24;animation:draw 300ms var(--ease-out) forwards}@keyframes draw{to{stroke-dashoffset:0}}
.q .row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:14px}
.fact{margin-top:14px;background:var(--mist);border-radius:14px;padding:14px 18px;font-size:17px;line-height:1.5;max-width:46em}
.fact b{font-family:var(--sans);font-size:13px;color:var(--verm);display:block;margin-bottom:4px}
.q details summary{list-style:none;cursor:pointer;display:inline-flex}.q details summary::-webkit-details-marker{display:none}
.q details[open] summary{display:none}
.iconbtn{font-family:var(--sans);font-size:13px;font-weight:600;color:var(--muted);cursor:pointer;padding:8px 10px;border-radius:10px;min-height:44px;display:inline-flex;align-items:center;gap:6px;background:none}
.iconbtn:hover{background:var(--mist);color:var(--ink)}.iconbtn.on{color:var(--verm)}
.sr{position:absolute;left:-9999px}
footer.site{padding:48px 0 40px;background:var(--mist);margin-top:96px}
footer.site .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;align-items:flex-end;font-family:var(--sans);font-size:13px;color:var(--muted)}
footer.site nav{display:flex;gap:18px}footer.site img{height:34px;width:auto;mix-blend-mode:multiply}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translate(-50%,140%);opacity:0;background:var(--ink);color:#fff;font-family:var(--sans);font-size:14px;padding:12px 18px;border-radius:12px;box-shadow:var(--e3);transition:transform .3s var(--ease-out),opacity .3s;z-index:70}
.toast.show{transform:translate(-50%,0);opacity:1}
@media (max-width:720px){header.site nav{display:none}body{font-size:17px}.wrap{padding:0 18px}.q .stem{font-size:18px}}
@media (prefers-reduced-motion:reduce){*{animation-duration:1ms!important;transition-duration:1ms!important;scroll-behavior:auto!important}}
a,button,input,label,select,textarea,summary{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.chip.card{background:var(--ink);color:#fff}