/* ============ StatGarden — ledger & LCD ============ */
:root{
  --ink:#14231D; --ink-70:#4A5B53; --ink-45:#7C8A82;
  --paper:#E4E9E0; --card:#F7F9F4; --rule:#C6CFBC; --rule-soft:#D8DFD0;
  --lcd:#A7BB99; --lcd-ink:#12211A; --accent:#A8710A; --accent-soft:#EDE3CB;
  --radius:3px;
  --mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,'SF Mono',Menlo,Consolas,monospace;
  --sans:'Space Grotesk','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--sans); font-size:15.5px; line-height:1.6;
  background-image:linear-gradient(var(--rule-soft) 1px,transparent 1px),linear-gradient(90deg,var(--rule-soft) 1px,transparent 1px);
  background-size:28px 28px; background-position:-1px -1px;
}
a{color:var(--ink); text-decoration-color:var(--rule); text-underline-offset:2px}
a:hover{text-decoration-color:var(--accent)}
.eyebrow{font-family:var(--mono); font-size:10px; letter-spacing:.18em; text-transform:uppercase; color:var(--ink-45)}
.shell{max-width:1180px; margin:0 auto; padding:0 20px}

/* ---------- masthead + category nav ---------- */
header.top{position:sticky; top:0; z-index:60; background:var(--ink); color:var(--paper)}
.top-1{display:flex; align-items:center; gap:18px; padding:11px 0}
.brand{display:flex; align-items:baseline; gap:9px; text-decoration:none; color:var(--paper); flex:0 0 auto}
.brand b{font-size:19px; font-weight:700; letter-spacing:-.02em}
.brand span{font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; color:var(--lcd)}
.search{flex:1; position:relative; max-width:440px; margin-left:auto}
.search input{width:100%; padding:8px 12px 8px 30px; font-family:var(--mono); font-size:13px;
  background:#1D3129; border:1px solid #2D453B; border-radius:var(--radius); color:var(--paper)}
.search input::placeholder{color:#7E9187}
.search input:focus{outline:2px solid var(--lcd); outline-offset:1px}
.search:before{content:'\2315'; position:absolute; left:10px; top:6px; font-size:15px; color:#7E9187}
#sugg{position:absolute; top:calc(100% + 5px); left:0; right:0; background:var(--card); border:1px solid var(--rule);
  border-radius:var(--radius); box-shadow:0 12px 28px rgba(20,35,29,.22); overflow:hidden; z-index:70}
.sg{display:flex; justify-content:space-between; gap:10px; padding:8px 12px; text-decoration:none; color:var(--ink);
  border-bottom:1px solid var(--rule-soft); font-size:13.5px}
.sg:last-child{border-bottom:0}
.sg:hover,.sg.on{background:var(--accent-soft)}
.sg b{font-weight:500}
.sg i{font-style:normal; font-family:var(--mono); font-size:10px; color:var(--ink-45); white-space:nowrap; padding-top:2px}
.sg-none{padding:10px 12px; font-family:var(--mono); font-size:12px; color:var(--ink-45)}
#burger{display:none; background:none; border:1px solid #2D453B; color:var(--paper); border-radius:var(--radius);
  font-family:var(--mono); font-size:11px; padding:6px 10px; cursor:pointer}
nav.cats{border-top:1px solid #2D453B}
nav.cats ul{display:flex; gap:0; margin:0; padding:0; list-style:none; overflow-x:auto; scrollbar-width:none}
nav.cats ul::-webkit-scrollbar{display:none}
nav.cats a{display:block; padding:9px 13px; text-decoration:none; color:#B9C8BE; font-size:13.5px; white-space:nowrap;
  border-bottom:2px solid transparent}
nav.cats a:hover{color:var(--paper); background:#1D3129}
nav.cats a[aria-current]{color:var(--paper); border-bottom-color:var(--accent)}
.cat-item{display:flex; align-items:stretch; position:relative}
.cat-item .catmenu{position:fixed; z-index:80; padding:28px 32px; margin:0;
  display:grid; grid-template-columns:repeat(var(--cols,3), max-content); gap:8px 48px;
  max-width:calc(100vw - 16px); max-height:80vh; overflow-y:auto; overflow-x:auto;
  background:var(--card); border:1px solid var(--rule); border-radius:var(--radius);
  box-shadow:0 18px 40px rgba(20,35,29,.3)}
.cat-item .catmenu[hidden]{display:none}
.submenu-h{display:block; padding:0 0 12px; margin-bottom:10px; white-space:nowrap;
  font-family:var(--sans); font-size:16px; font-weight:700; letter-spacing:-.01em;
  color:var(--ink); text-decoration:none; border-bottom:1px solid var(--rule-soft)}
.submenu-h:hover{color:var(--accent)}
.cat-item .catmenu ul{display:block; list-style:none; margin:0; padding:0}
.catmenu li{margin:0}
.catmenu li a{display:block; padding:5px 0; font-size:14px; line-height:1.4; color:var(--ink-70); text-decoration:none;
  white-space:nowrap; border-bottom:0}
.catmenu li a:hover{color:var(--ink); text-decoration-color:var(--accent)}
.submenu-more{color:var(--accent) !important; font-weight:500}

/* ---------- breadcrumb + page head ---------- */
.crumb{padding:14px 0 0; font-family:var(--mono); font-size:11px; color:var(--ink-45)}
.crumb a{color:var(--ink-45)}
.crumb span{margin:0 6px; opacity:.5}
.phead{padding:14px 0 22px; border-bottom:2px solid var(--ink); margin-bottom:26px}
.phead h1{margin:6px 0 0; font-size:clamp(28px,4.4vw,42px); line-height:1.04; letter-spacing:-.032em; max-width:20ch}
.phead .lede{margin:12px 0 0; font-size:17px; color:var(--ink-70); max-width:62ch}
.phead .meta{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
.pill{font-family:var(--mono); font-size:10px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-45);
  border:1px solid var(--rule); padding:3px 9px; border-radius:99px; text-decoration:none}
.pill:hover{border-color:var(--accent); color:var(--accent)}

/* ---------- page body grid ---------- */
.cols{display:grid; grid-template-columns:minmax(0,1fr) 250px; gap:44px; align-items:start; padding-bottom:60px}
aside{position:sticky; top:104px}
aside h2{font-family:var(--mono); font-size:10px; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-45); margin:0 0 10px}
aside ol{list-style:none; margin:0 0 24px; padding:0; counter-reset:t}
aside ol a{display:block; padding:5px 0 5px 22px; font-size:13px; color:var(--ink-70); text-decoration:none; position:relative}
aside ol a:before{counter-increment:t; content:counter(t,decimal-leading-zero); position:absolute; left:0;
  font-family:var(--mono); font-size:9.5px; color:var(--accent); top:7px}
aside ol a:hover{color:var(--ink)}
aside .rel a{display:block; padding:6px 0; border-bottom:1px solid var(--rule-soft); font-size:13px; color:var(--ink-70); text-decoration:none}
aside .rel a:hover{color:var(--accent)}

/* ---------- prose ---------- */
article h2{font-size:24px; letter-spacing:-.024em; margin:46px 0 12px; padding-bottom:8px; border-bottom:1px solid var(--rule)}
article h2:first-child{margin-top:0}
article h3{font-size:17.5px; letter-spacing:-.015em; margin:26px 0 6px}
article p{margin:0 0 14px; max-width:70ch}
article ul{max-width:70ch; padding-left:20px}
article li{margin-bottom:7px}
article strong{font-weight:600}
.kbd{font-family:var(--mono); font-size:.9em; background:var(--accent-soft); padding:1px 5px; border-radius:2px; color:#4A3A16}

/* formula block */
.fbox{background:var(--accent-soft); border:1px solid #DFD0AE; border-left:3px solid var(--accent); border-radius:var(--radius);
  padding:14px 16px; margin:0 0 18px; font-family:var(--mono); font-size:13px; line-height:1.7; color:#4A3A16; overflow-x:auto}
.fbox b{display:block; font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); margin-bottom:6px}
.terms{width:100%; border-collapse:collapse; margin:0 0 18px; font-size:14px}
.terms th{text-align:left; font-family:var(--mono); font-size:9.5px; letter-spacing:.12em; text-transform:uppercase;
  color:var(--ink-45); border-bottom:1px solid var(--rule); padding:6px 12px 6px 0}
.terms td{padding:7px 12px 7px 0; border-bottom:1px solid var(--rule-soft); vertical-align:top}
.terms td:first-child{font-family:var(--mono); font-size:13px; color:var(--accent); white-space:nowrap; width:1%}

/* worked-example tables */
.wex{margin:0 0 22px; border:1px solid var(--rule); border-radius:var(--radius); overflow:hidden; background:var(--card)}
.wex-h{padding:10px 14px; background:var(--ink); color:var(--paper); font-family:var(--mono); font-size:10px;
  letter-spacing:.13em; text-transform:uppercase}
.wex table{width:100%; border-collapse:collapse; font-size:14px}
.wex th{text-align:right; padding:9px 14px; font-family:var(--mono); font-size:9.5px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--ink-45); border-bottom:1px solid var(--rule); background:#EEF2EA}
.wex th:first-child,.wex td:first-child{text-align:left}
.wex td{text-align:right; padding:8px 14px; border-bottom:1px solid var(--rule-soft); font-family:var(--mono); font-size:13.5px}
.wex tr:last-child td{border-bottom:0}
.wex tbody tr:hover{background:var(--accent-soft)}
.wex td:first-child{font-family:var(--sans); font-weight:500}
.wex td a{color:inherit; text-decoration:none; display:block}
.wex td a:hover{color:var(--accent)}
.wex-f{padding:9px 14px; border-top:1px solid var(--rule); font-size:12.5px; color:var(--ink-70); background:#EEF2EA}
.tscroll{overflow-x:auto}

/* faq */
.faq{border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{padding:13px 0; cursor:pointer; font-weight:500; font-size:16px; list-style:none; display:flex; gap:12px; align-items:baseline}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:'+'; font-family:var(--mono); color:var(--accent); font-size:15px}
.faq details[open] summary:before{content:'\2212'}
.faq details p{padding:0 0 14px 24px; margin:0; color:var(--ink-70)}

/* ---------- calculator widget ---------- */
.calc{background:var(--card); border:1px solid var(--rule); border-radius:var(--radius); overflow:hidden; margin-bottom:8px}
.calc-body{display:grid; grid-template-columns:1fr 1fr}
.inputs{padding:18px; display:grid; grid-template-columns:1fr 1fr; gap:13px 15px; align-content:start}
.inputs.one{grid-template-columns:1fr}
.f{display:flex; flex-direction:column; gap:4px; min-width:0}
.f label{font-size:11.5px; color:var(--ink-70); line-height:1.3}
.f label u{text-decoration:none; color:var(--ink-45); font-family:var(--mono); font-size:10px}
.f input,.f select{width:100%; padding:8px 9px; font-family:var(--mono); font-size:14px; color:var(--ink);
  background:#fff; border:1px solid var(--rule); border-radius:var(--radius)}
.f input:focus,.f select:focus{outline:2px solid var(--accent); outline-offset:-1px; border-color:var(--accent)}
.f.wide{grid-column:1/-1}
.out{background:var(--lcd); border-left:1px solid var(--rule); padding:18px; min-width:0}
.lcd{position:relative; padding:13px 15px 14px; background:linear-gradient(180deg,#B4C7A6,#9DB18F);
  border:1px solid #869B78; border-radius:2px; margin-bottom:13px}
.lcd .k{font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:#3D5245}
.lcd .v{font-family:var(--mono); font-size:clamp(20px,3.4vw,27px); font-weight:600; letter-spacing:-.03em;
  color:var(--lcd-ink); word-break:break-word; line-height:1.15; margin-top:2px}
.lcd .dot{position:absolute; top:11px; right:12px; width:6px; height:6px; border-radius:99px; background:var(--accent); opacity:.55}
.lcd.flash{animation:flash .32s ease-out}
@keyframes flash{0%{background:#C6D6B9}100%{background:linear-gradient(180deg,#B4C7A6,#9DB18F)}}
.rows{display:flex; flex-direction:column}
.row{display:flex; justify-content:space-between; gap:12px; padding:6px 0; border-bottom:1px dotted #8FA582; font-size:13px}
.row:last-child{border-bottom:0}
.row .l{color:#3D5245; min-width:0}
.row .v{font-family:var(--mono); font-weight:500; text-align:right; color:var(--lcd-ink); white-space:nowrap}
table.mini{width:100%; border-collapse:collapse; margin-top:10px; font-family:var(--mono); font-size:11px}
table.mini th{text-align:right; font-weight:500; color:#3D5245; padding:3px 0 5px; border-bottom:1px solid #869B78;
  text-transform:uppercase; letter-spacing:.08em; font-size:9.5px}
table.mini td{text-align:right; padding:3px 0; border-bottom:1px dotted #8FA582; color:var(--lcd-ink)}
table.mini th:first-child,table.mini td:first-child{text-align:left}
.tbl-wrap{max-height:200px; overflow:auto}
.formula{display:flex; gap:12px; padding:11px 18px; background:var(--accent-soft); border-top:1px solid var(--rule);
  font-family:var(--mono); font-size:11.5px; line-height:1.55; color:#4A3A16}
.formula b{flex:0 0 auto; letter-spacing:.14em; font-size:9.5px; text-transform:uppercase; color:var(--accent); padding-top:2px}
.formula span{word-break:break-word}
.mini-btn{margin-left:auto; background:none; border:1px solid var(--rule); color:var(--ink-45); font-family:var(--mono);
  font-size:10px; padding:2px 8px; border-radius:99px; cursor:pointer; white-space:nowrap; align-self:flex-start}
.mini-btn:hover{border-color:var(--accent); color:var(--accent)}

/* ---------- index & category listings ---------- */
.hero{padding:48px 0 34px; border-bottom:1px solid var(--rule)}
.hero h1{margin:8px 0 0; font-size:clamp(34px,6vw,62px); line-height:.98; letter-spacing:-.035em; max-width:16ch}
.hero h1 em{font-style:normal; color:var(--accent)}
.hero p{max-width:58ch; margin:16px 0 0; color:var(--ink-70); font-size:16.5px}
.catblock{padding:36px 0 6px; border-bottom:1px solid var(--rule)}
.catblock:last-of-type{border-bottom:0}
.catblock-h{display:flex; align-items:baseline; justify-content:space-between; gap:16px; margin-bottom:16px}
.catblock-h h2{margin:0; font-size:23px; letter-spacing:-.024em}
.catblock-h h2 a{text-decoration:none}
.catblock-h p{margin:4px 0 0; font-size:14px; color:var(--ink-70); max-width:62ch}
.tiles{display:grid; grid-template-columns:repeat(auto-fill,minmax(258px,1fr)); gap:10px; padding-bottom:28px}
.tile{display:block; padding:12px 14px; background:var(--card); border:1px solid var(--rule); border-radius:var(--radius);
  text-decoration:none; color:var(--ink)}
.tile:hover{border-color:var(--accent); background:#fff}
.tile b{display:block; font-size:14.5px; font-weight:500; letter-spacing:-.01em}
.tile span{display:block; margin-top:3px; font-size:12.5px; color:var(--ink-70); line-height:1.45}

footer{border-top:1px solid var(--rule); margin-top:20px}
footer .shell{padding:26px 20px 60px; color:var(--ink-45); font-size:12.5px}
footer b{color:var(--ink-70)}
footer nav{display:flex; flex-wrap:wrap; gap:14px; margin-bottom:12px}
footer nav a{color:var(--ink-70); font-size:13px}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .cols{grid-template-columns:minmax(0,1fr); gap:0}
  aside{position:static; margin-top:34px; padding-top:22px; border-top:1px solid var(--rule)}
  aside ol{columns:2; column-gap:22px}
}
@media (max-width:760px){
  #burger{display:block}
  .search{order:3; max-width:none; flex-basis:100%; margin-left:0}
  .top-1{flex-wrap:wrap; gap:10px}
  nav.cats{display:none}
  nav.cats.open{display:block; max-height:60vh; overflow:auto}
  nav.cats ul{flex-direction:column; overflow:visible}
  nav.cats a{border-bottom:1px solid #2D453B}
  .calc-body{grid-template-columns:1fr}
  .out{border-left:0; border-top:1px solid var(--rule)}
  aside ol{columns:1}
}
@media (max-width:560px){ .inputs{grid-template-columns:1fr} }
@media (prefers-reduced-motion:reduce){ *{animation:none!important; scroll-behavior:auto!important} }
@media print{ header.top,aside,.search{display:none} .wex{break-inside:avoid} }