/* Jugami Trigonometry and Pre-Calculus: "Surveyor's field book" theme.
   Slate-teal ink, field-book khaki paper with faint contour lines, survey-stake vermilion,
   and one colour per side of the triangle (opposite / adjacent / hypotenuse) used everywhere.
   Swap the whole look via the custom properties below. */
:root{
  --ink:#143840; --ink2:#2a5059; --text:#1f2d33; --muted:#4f5f66;
  --paper:#f3efe3; --paper2:#e7e0cc; --card:#fffdf6; --line:#cbc1a6; --contour:rgba(20,56,64,.06);
  --stake:#b8401a; --stake2:#d4612f; --brass:#9a6b12; --brass2:#e2b04a;
  --opp:#b8401a; --adj:#1f5f9e; --hyp:#3f6f1c; --ang:#8a5a00;
  --good:#2b6e3a; --bad:#a3301f;
  --radius:10px;
  --display:"Avenir Next","Segoe UI Semibold","Gill Sans","Gill Sans MT","Trebuchet MS",system-ui,sans-serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --ja-accent:#f2b84b; --ja-ink:#143840;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;color:var(--text);font-family:var(--sans);font-size:18px;line-height:1.65;background-color:var(--paper);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='360' height='360' viewBox='0 0 360 360'%3E%3Cg fill='none' stroke='%23143840' stroke-opacity='.06' stroke-width='1.2'%3E%3Cpath d='M-20 80C60 40 120 120 200 90S330 30 380 70'/%3E%3Cpath d='M-20 150C70 110 130 190 210 160S320 100 380 140'/%3E%3Cpath d='M-20 230C50 200 140 270 220 240S330 180 380 220'/%3E%3Cpath d='M-20 310C80 280 140 350 230 320S320 260 380 300'/%3E%3C/g%3E%3C/svg%3E")}
a{color:var(--stake);text-underline-offset:2px}
a:hover{color:var(--ink)}
img,svg{max-width:100%;height:auto}
h1,h2,h3{font-family:var(--display);color:var(--ink);line-height:1.2;font-weight:700}
h2{font-size:1.75rem;margin:2.2em 0 .5em;scroll-margin-top:12px}
h2 .kicker{display:block;font-family:var(--mono);font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--stake);font-weight:600;margin-bottom:.4em}
h2::after{content:"";display:block;width:84px;height:4px;margin-top:.45em;background:repeating-linear-gradient(90deg,var(--stake) 0 14px,var(--card) 14px 21px)}
h3{font-size:1.22rem;margin:1.5em 0 .3em;scroll-margin-top:12px}
p{margin:.6em 0}
.skip{position:absolute;left:-999px;top:8px;min-height:44px;display:inline-flex;align-items:center}
.skip:focus{left:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:10}
:focus-visible{outline:3px solid var(--brass2);outline-offset:2px}
main:focus{outline:none}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.prose{max-width:41rem}
/* header */
.site-head{background:var(--ink);color:#fff;border-bottom:5px solid var(--stake)}
.site-head .bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:8px 18px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-family:var(--display);font-weight:700;font-size:1.2rem;letter-spacing:.02em;min-height:44px}
.brand img{width:36px;height:36px}
.brand:hover{color:var(--brass2)}
.head-nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:6px}
.head-nav a{color:#fff;text-decoration:none;font-size:.88rem;padding:0 12px;border:1px solid rgba(226,176,74,.5);border-radius:999px;min-height:44px;display:inline-flex;align-items:center}
.head-nav a:hover,.head-nav a:focus-visible{background:var(--brass2);color:var(--ink)}
.crumbs{font-size:.88rem;color:var(--muted);margin:10px 0 0}
.crumbs a{color:var(--muted);min-height:44px;display:inline-flex;align-items:center}
/* hero */
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:30px;align-items:center;padding:16px 0 6px}
.hero h1{font-size:clamp(2.2rem,6vw,3.4rem);margin:.05em 0 .15em;letter-spacing:-.01em}
.tagline{font-family:var(--serif);font-style:italic;font-size:1.3rem;color:var(--ink2);margin:0 0 .6em}
.plate{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;box-shadow:0 10px 28px rgba(20,56,64,.12)}
.plate figcaption,.fig figcaption{font-size:.92rem;color:var(--muted);margin-top:6px;text-align:center}
.fig{margin:18px 0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px;max-width:41rem}
.fig svg{display:block;margin:0 auto}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.btn,button{font-family:var(--sans);font-size:1rem;font-weight:600;cursor:pointer;border-radius:999px;padding:0 18px;min-height:44px;border:2px solid var(--stake);background:var(--stake);color:#fff;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.btn.ghost,button.ghost{background:transparent;color:var(--stake)}
.btn:hover,button:hover{background:var(--ink);border-color:var(--ink);color:#fff}
button:disabled{opacity:.5;cursor:not-allowed}
/* toc */
.toc{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:12px 0}
.toc a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--ink);background:rgba(255,253,246,.8);font-size:.92rem}
.toc a:hover{border-color:var(--stake)}
/* cards (hub) */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;list-style:none;padding:0;margin:18px 0}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px 14px;box-shadow:0 6px 18px rgba(20,56,64,.08)}
.card .unit{font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.card h3{margin:.25em 0 .3em}
.card p{margin:.3em 0;font-size:.98rem}
.card svg{width:76px;height:76px;float:right;margin:0 0 6px 10px}
.card.soon{background:rgba(255,253,246,.55);border-style:dashed}
.card.soon h3{color:var(--ink2)}
.card.live{border:2px solid var(--stake)}
.card.live h3 a{text-decoration:none;min-height:44px;display:inline-flex;align-items:center}
.card.live h3 a::after{content:"";position:absolute;inset:0;border-radius:var(--radius)}
.card.live:hover{box-shadow:0 0 0 3px var(--brass2)}
.card.live:focus-within{outline:3px solid var(--brass2);outline-offset:2px}
.card.live h3 a:focus-visible{outline:none}
.tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:2px 9px;border-radius:999px;background:var(--paper2);color:var(--ink2)}
.tag.on{background:var(--stake);color:#fff}
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;list-style:none;padding:0;margin:14px 0}
.tools li{background:var(--card);border:1px solid var(--line);border-left:5px solid var(--adj);border-radius:var(--radius);padding:10px 14px}
.tools li:nth-child(2){border-left-color:var(--opp)} .tools li:nth-child(3){border-left-color:var(--hyp)}
.tools a{font-weight:700;min-height:44px;display:inline-flex;align-items:center}
.tools p{margin:.1em 0 .2em;font-size:.95rem}
/* math */
.m{font-family:var(--serif);white-space:nowrap}
var{font-family:var(--serif);font-style:italic}
.frac{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;margin:0 .15em;line-height:1.15}
.frac>span:first-child{border-bottom:1.5px solid currentColor;padding:0 .2em .05em}
.frac>span:last-child{padding:.05em .2em 0}
.opp{color:var(--opp);font-weight:600} .adj{color:var(--adj);font-weight:600} .hyp{color:var(--hyp);font-weight:600} .ang{color:var(--ang);font-weight:600}
.display{display:block;text-align:center;font-size:1.15rem;margin:14px 0;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto;max-width:41rem}
.def{background:var(--card);border:1px solid var(--line);border-left:6px solid var(--ink);border-radius:4px;padding:12px 18px;margin:16px 0;max-width:41rem}
.note{background:rgba(226,176,74,.16);border-left:5px solid var(--brass2);padding:10px 16px;max-width:41rem;margin:14px 0;border-radius:4px}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:16px 0}
.trio>div{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;text-align:center}
.trio .big{font-family:var(--display);font-size:1.9rem;font-weight:800;color:var(--ink);letter-spacing:.04em;display:block}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:16px 0}
.duo figure{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:10px 14px}
.duo h3{margin:.3em 0 .2em;font-size:1.08rem}
.duo p{font-size:.97rem;margin:.3em 0}
table.vals{border-collapse:collapse;font-family:var(--mono);font-size:.9rem;margin:12px 0;background:var(--card)}
table.vals caption{font-family:var(--sans);font-size:.9rem;text-align:left;color:var(--muted);padding-bottom:4px}
table.vals th,table.vals td{border:1px solid var(--line);padding:5px 10px;text-align:center}
table.vals th{font-family:var(--sans);background:var(--paper2);font-weight:700;color:var(--ink)}
.tablewrap{overflow-x:auto;max-width:100%}
/* worked examples */
.example{background:var(--card);border:1px solid var(--line);border-top:4px solid var(--ink);border-radius:var(--radius);padding:4px 20px 14px;margin:18px 0;max-width:46rem}
.example h3{margin-top:.8em}
.work{display:grid;grid-template-columns:minmax(0,max-content) 1fr;gap:6px 22px;align-items:center;margin:10px 0;font-size:1.05rem}
.work .l{font-family:var(--serif);white-space:nowrap;overflow-x:auto}
.work .r{font-size:.9rem;color:var(--muted)}
.work .ans{font-weight:700;color:var(--stake)}
.check{font-size:.93rem;color:var(--good);margin:.4em 0}
svg.graph.exfig{float:right;width:240px;margin:14px 0 8px 16px}
.example::after{content:"";display:block;clear:both}
/* widgets */
.widget{background:var(--card);border:2px solid var(--ink);border-radius:var(--radius);padding:16px 18px;margin:18px 0;box-shadow:0 8px 24px rgba(20,56,64,.12)}
.widget .help{font-size:.95rem;color:var(--muted);margin:0 0 10px}
.wgrid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;align-items:start}
.graph{background:#fffefa;border:1px solid var(--line);border-radius:6px;display:block;width:100%;height:auto}
.controls{font-size:.97rem}
.controls label{display:block;font-weight:700;margin:8px 0 0}
.controls output{font-family:var(--mono);color:var(--stake);font-weight:700}
input[type=range]{width:100%;accent-color:var(--stake);height:44px;margin:0}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0}
.seg button{background:transparent;color:var(--ink);border-color:var(--ink);font-size:.93rem}
.seg button[aria-pressed=true]{background:var(--ink);color:#fff}
.ratios{width:100%;border-collapse:collapse;font-size:.95rem;margin:10px 0}
.ratios th,.ratios td{border-bottom:1px solid var(--line);padding:6px 4px;text-align:left}
.ratios td{font-family:var(--mono)}
.verdict{border-left:5px solid var(--brass2);background:rgba(226,176,74,.14);padding:8px 12px;font-size:.95rem;border-radius:4px}
.noscript{background:#fff3cd;border:1px solid var(--brass2);padding:10px 14px;font-size:.95rem;border-radius:6px}
/* practice */
.pgrid{display:grid;grid-template-columns:240px 1fr;gap:18px;align-items:start}
.pq{font-size:1.08rem;font-weight:600;margin:.2em 0 .5em}
.prow{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.prow input[type=text]{font:inherit;font-family:var(--mono);min-height:44px;width:10em;padding:0 10px;border:2px solid var(--ink2);border-radius:6px;background:#fff}
.choices{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0}
.choices button{background:#fff;color:var(--ink);border-color:var(--ink2);font-family:var(--serif);font-size:1.1rem;min-width:4.5em}
.choices button:hover{background:var(--ink);color:#fff}
.pfb{min-height:2.4em;margin:10px 0 4px;font-size:.98rem}
.pfb.ok{color:var(--good);font-weight:600}
.pfb.no{color:var(--bad);font-weight:600}
.pfb .how{display:block;font-weight:400;color:var(--text);margin-top:4px}
.stats{display:flex;flex-wrap:wrap;gap:18px;margin:10px 0;font-size:.97rem}
.stats b{color:var(--stake);font-family:var(--mono)}
.modes{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 10px}
.modes button{background:transparent;color:var(--ink);border-color:var(--ink2);font-size:.9rem}
.modes button[aria-pressed=true]{background:var(--ink);color:#fff}
details.how-scoring summary,details.reveal summary{cursor:pointer;color:var(--stake);font-weight:600;min-height:44px;display:flex;align-items:center}
/* quiz */
.quiz fieldset{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);margin:12px 0;padding:10px 16px 12px;max-width:46rem}
.quiz legend{font-weight:700;padding:0 6px;color:var(--ink)}
.quiz .opts{display:grid;gap:4px;margin-top:4px}
.quiz label{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:4px 8px;min-height:44px;border-radius:6px;cursor:pointer}
.quiz label:hover{background:var(--paper2)}
.quiz input[type=radio]{accent-color:var(--stake);width:18px;height:18px;flex:none}
.quiz label.right{background:#dcefdc;outline:2px solid var(--good)}
.quiz label.wrong{background:#f6dcd6;outline:2px solid var(--bad)}
.quiz label .fb{font-size:.85rem;font-weight:700;margin-left:auto;padding-left:6px}
.quiz label.right .fb{color:#1f5a2a}
.quiz label.wrong .fb{color:#8a1f12}
.quiz .why{font-size:.93rem;color:var(--muted);margin:.5em 0 0}
.qmsg{font-weight:700}
/* talk + history */
.talk{counter-reset:t;list-style:none;padding:0;max-width:44rem}
.talk li{counter-increment:t;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px 12px 56px;margin:10px 0;position:relative}
.talk li::before{content:counter(t);position:absolute;left:14px;top:12px;width:30px;height:30px;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-family:var(--mono)}
.history{background:var(--card);border:1px dashed var(--ink2);border-radius:var(--radius);padding:4px 20px 12px;max-width:44rem}
ul.sources{padding-left:1.2em;max-width:46rem}
ul.sources li{margin:.45em 0;font-size:.97rem}
/* pager + footer */
.pager{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin:40px 0 10px;padding:14px 0;border-top:3px dashed var(--line)}
.pager a{min-height:44px;display:inline-flex;align-items:center;font-weight:600}
.pager .soon{color:var(--muted)}
.site-foot{margin-top:40px;background:var(--ink);color:#e9eef0;padding:22px 0;font-size:.95rem;border-top:5px solid var(--stake)}
.site-foot a{color:var(--brass2);min-height:44px;display:inline-flex;align-items:center;vertical-align:middle}
.jugami-more{margin-top:10px}
.jugami-more span{font-weight:700;margin-right:4px}
.skip:focus{min-height:44px;display:inline-flex;align-items:center}
@media (max-width:760px){
  body{font-size:17.5px}
  .hero,.wgrid,.pgrid,.duo{grid-template-columns:1fr}
  .trio{grid-template-columns:1fr}
  .head-nav{margin-left:0}
  .work{grid-template-columns:1fr;gap:2px}
  .work .r{margin-bottom:6px}
  svg.graph.exfig{float:none;display:block;margin:10px auto;width:100%;max-width:280px}
  .card svg{width:60px;height:60px}
  .pgrid svg{max-width:280px;margin:0 auto}
}

/* account.js widget in the dark header: white text, 44px tap target (Mandy r1) */
.site-head .ja-widget a,.site-head .ja-widget button{color:#fff;min-height:44px;display:inline-flex;align-items:center;padding:0 12px}
/* white text needs a dark ground: secondary widget buttons go transparent on the header; the brass
   Log in button carries header ink (white on #f2b84b would be ~1.9:1); dropdown items stay ink on paper */
.site-head .ja-widget a,.site-head .ja-widget button{background:transparent;border-color:rgba(255,255,255,.5)}
.site-head .ja-widget .ja-primary,.site-head .ja-widget .ja-primary:hover,.site-head .ja-widget .ja-primary:focus-visible{background:#f2b84b;color:#143840;border-color:transparent}
.site-head .ja-widget .ja-menu a,.site-head .ja-widget .ja-menu button{color:#143840;background:transparent;border-color:transparent;padding:0 12px}
.site-head .ja-widget .ja-menu a:hover,.site-head .ja-widget .ja-menu button:hover{background:rgba(20,56,64,.08)}
/* Mark-complete card sits on paper, not the header: keep the rust accent with white text there */
.ja-card{--ja-accent:#b8401a;--ja-accent-hover:#9a3413;--ja-accent-ink:#fff}