/* Boring Millionaires · the beautiful ledger
   Tokens ------------------------------------------------------------------ */
:root{
  --paper:#EDEFE2;        /* pale ledger paper */
  --paper-2:#E3E6D3;      /* deeper band */
  --card:#F5F6EC;         /* raised surface */
  --ink:#1C2620;
  --ink-2:#4C574A;
  --line:rgba(28,38,32,.16);
  --line-strong:rgba(28,38,32,.38);
  --green:#1D5B41;        /* the one accent */
  --green-hover:#174A35;
  --green-deep:#123527;   /* dark bands */
  --red:#A93E26;          /* semantic only */
  --r:4px;
  --sec:clamp(72px,9vw,124px);
  --gap-head:clamp(28px,4vw,44px);
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Hanken Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Spline Sans Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --ease:cubic-bezier(.22,.7,.35,1);
}

/* Base -------------------------------------------------------------------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:400 1.0625rem/1.6 var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
::selection{background:var(--green);color:var(--paper)}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:2px}
img,svg{display:block;max-width:100%}
a{color:inherit}

.container{width:100%;max-width:1140px;margin-inline:auto;padding-inline:clamp(20px,4vw,32px)}
section{width:100%}

h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.06;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(2.7rem,6.2vw,4.6rem)}
h2{font-size:clamp(1.95rem,3.6vw,2.8rem)}
h3{font-size:1.4rem;line-height:1.2}
.lede{font-size:clamp(1.1rem,1.6vw,1.25rem);line-height:1.55;color:var(--ink-2)}
.serif-i{font-style:italic}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.small{font-size:.8125rem}
.muted{color:var(--ink-2)}

/* Text links: underline wipe ---------------------------------------------- */
.tlink{color:var(--green);font-weight:600;text-decoration:none;background:
  linear-gradient(var(--green),var(--green)) no-repeat 0 100%/0 1.5px;
  transition:background-size .22s var(--ease);padding-bottom:2px}
.tlink:hover{background-size:100% 1.5px}

/* Buttons: six states, tuned ---------------------------------------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-height:48px;padding:.7em 1.4em;border-radius:var(--r);
  font:600 1rem/1 var(--sans);text-decoration:none;cursor:pointer;
  border:1px solid transparent;transition:background .16s var(--ease),border-color .16s var(--ease),transform .12s var(--ease),box-shadow .16s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn-solid{background:var(--green);color:var(--paper)}
.btn-solid:hover{background:var(--green-hover)}
.btn-solid:focus-visible{outline-color:var(--ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink);background:var(--card)}
.on-dark .btn-solid{background:var(--paper);color:var(--green-deep)}
.on-dark .btn-solid:hover{background:#fff}
.on-dark :focus-visible{outline-color:var(--paper)}

/* Header ------------------------------------------------------------------ */
.site-head{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 92%,transparent);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.site-head .container{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);margin-right:auto}
.brand svg{width:26px;height:26px;color:var(--green)}
.brand svg .face{fill:var(--card)}
.foot-brand svg .face{fill:var(--green-deep)}
.brand b{font:600 1.15rem/1 var(--serif);letter-spacing:-.01em}
.nav{display:flex;align-items:center;gap:6px}
.nav a{padding:10px 12px;border-radius:var(--r);text-decoration:none;font-weight:600;font-size:.95rem;color:var(--ink-2);transition:color .15s,background .15s}
.nav a:hover{color:var(--ink);background:var(--card)}
.nav a.on{color:var(--green)}
.nav a.on{box-shadow:inset 0 -2px 0 var(--green);border-radius:var(--r) var(--r) 0 0}
.nav .btn{min-height:40px;padding:.5em 1.1em;margin-left:8px}
.nav a.btn-solid{color:var(--paper)}
.nav a.btn-solid:hover{color:var(--paper);background:var(--green-hover)}
.nav-toggle{display:none;background:none;border:1px solid var(--line-strong);border-radius:var(--r);
  width:44px;height:44px;cursor:pointer;color:var(--ink);align-items:center;justify-content:center}
@media (max-width:820px){
  .nav-toggle{display:inline-flex}
  .nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;
    background:var(--paper);border-bottom:1px solid var(--line);padding:12px clamp(20px,4vw,32px) 20px;display:none}
  .nav.open{display:flex}
  .nav a{padding:13px 12px}
  .nav a.on{box-shadow:inset 3px 0 0 var(--green);border-radius:0 var(--r) var(--r) 0}
  .nav .btn{margin:8px 0 0}
}

/* Ledger rules ------------------------------------------------------------ */
.rule{border:0;border-top:1px solid var(--line);margin:0}
.rule-strong{border-top-color:var(--line-strong)}

/* Hero -------------------------------------------------------------------- */
.hero{padding:clamp(64px,8vw,110px) 0 var(--sec)}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero-copy .lede{margin:22px 0 30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-foot{margin-top:34px;display:flex;gap:28px;color:var(--ink-2)}
.hero-foot b{display:block;font:600 1.35rem/1.1 var(--mono);color:var(--ink);font-variant-numeric:tabular-nums}
.hero-foot span{font-size:.8125rem}

/* The ledger card (signature) */
.ledger{background:var(--card);border:1px solid var(--line-strong);border-radius:var(--r);
  box-shadow:0 1px 0 var(--line),0 14px 34px -22px rgba(28,38,32,.45)}
.ledger-head{display:flex;justify-content:space-between;align-items:baseline;
  padding:14px 18px;border-bottom:1px solid var(--line-strong)}
.ledger-head b{font:600 .8125rem/1 var(--mono);letter-spacing:.02em}
.ledger-head span{font:400 .75rem/1 var(--mono);color:var(--ink-2)}
.ledger-row{display:grid;grid-template-columns:1fr auto;gap:2px 16px;align-items:center;
  padding:13px 18px;border-bottom:1px solid var(--line);text-decoration:none;color:inherit;
  transition:background .15s var(--ease)}
.ledger-row:last-of-type{border-bottom:0}
.ledger-row:hover{background:var(--paper-2)}
.ledger-row .who{font-weight:600;font-size:.95rem}
.ledger-row .what{grid-row:2;font-size:.8125rem;color:var(--ink-2)}
.ledger-row .amt{grid-row:span 2;font:600 1.05rem/1 var(--mono);color:var(--green);font-variant-numeric:tabular-nums}
.ledger-foot{padding:12px 18px;font:400 .75rem/1.4 var(--mono);color:var(--ink-2);border-top:1px solid var(--line-strong)}
@media (prefers-reduced-motion:no-preference){
  .ledger-row.print{opacity:0;transform:translateY(6px);animation:print .45s var(--ease) forwards}
  @keyframes print{to{opacity:1;transform:none}}
}

/* Figures (patent drawings) ----------------------------------------------- */
.fig{color:var(--ink)}
.fig svg{width:100%;height:auto;stroke:currentColor;fill:none}
.figcap{font:400 .72rem/1.4 var(--mono);letter-spacing:.03em;color:var(--ink-2);margin-top:10px}

/* Section headers ---------------------------------------------------------- */
.sec{padding:var(--sec) 0}
.sec-alt{background:var(--paper-2);border-block:1px solid var(--line)}
.sec-dark{background:var(--green-deep);color:var(--paper)}
.sec-dark .muted,.sec-dark .lede{color:color-mix(in srgb,var(--paper) 72%,var(--green-deep))}
.sec-head{margin-bottom:var(--gap-head)}
.sec-head .lede{margin-top:14px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:var(--gap-head)}
.sec-head-row .tlink{white-space:nowrap}
.sec-head-row .sec-head{margin-bottom:0}

/* Case study cards ---------------------------------------------------------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--card);border:1px solid var(--line-strong);border-radius:var(--r);
  padding:22px 22px 20px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:14px;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease)}
.card:hover{transform:translateY(-3px);border-color:var(--ink);box-shadow:0 16px 30px -20px rgba(28,38,32,.5)}
.card .fig{margin-bottom:4px}
.card .fig svg{width:96px}
.card h3{font-size:1.45rem}
.card .sub{color:var(--ink-2);font-size:.9rem;margin-top:4px}
.card p{font-size:.95rem;color:var(--ink-2)}
.card-stats{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:baseline}
.card-stats .amt{font:600 1.15rem/1 var(--mono);color:var(--green);font-variant-numeric:tabular-nums}
.bi{font:600 .78rem/1 var(--mono);color:var(--ink-2);border:1px solid var(--line-strong);
  border-radius:999px;padding:6px 10px;white-space:nowrap}
.bi b{color:var(--ink)}

/* Data table ---------------------------------------------------------------- */
.tablewrap{background:var(--card);border:1px solid var(--line-strong);border-radius:var(--r);overflow:clip}
table{width:100%;border-collapse:collapse;font-size:.95rem}
thead th{font:600 .78rem/1.2 var(--mono);letter-spacing:.02em;text-align:left;color:var(--ink-2);
  padding:14px 16px;border-bottom:1px solid var(--line-strong);white-space:nowrap;background:var(--card);position:sticky;top:68px}
th.num,td.num{text-align:right}
tbody td{padding:15px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
tbody tr:last-child td{border-bottom:0}
tbody tr{cursor:pointer;transition:background .12s}
tbody tr.norow{cursor:default}
tbody tr.norow:hover{background:transparent}
tbody tr:hover{background:var(--paper-2)}
td .who{font-weight:600}
td .what{font-size:.84rem;color:var(--ink-2);margin-top:2px}
td.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
td .amt{font-weight:600;color:var(--green)}
th button{all:unset;cursor:pointer;font:inherit;display:inline-flex;gap:6px;align-items:center;padding:2px 0}
th button:hover{color:var(--ink)}
th button:focus-visible{outline:2px solid var(--green);outline-offset:3px}
th .dir{font-size:.7rem;opacity:0;transition:opacity .12s}
th.sorted .dir{opacity:1}
@media (max-width:760px){
  thead th{top:0}
  .hide-m{display:none}
}

/* Toolbar (filters) --------------------------------------------------------- */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.field{position:relative;flex:1 1 240px}
.field input,.field select{width:100%;min-height:48px;padding:0 14px;border:1px solid var(--line-strong);
  border-radius:var(--r);background:var(--card);color:var(--ink);font:500 .95rem var(--sans);appearance:none}
.field select{padding-right:38px;cursor:pointer}
.field::after{content:"";position:absolute;right:14px;top:50%;width:8px;height:8px;pointer-events:none}
.field.sel::after{border-right:1.5px solid var(--ink-2);border-bottom:1.5px solid var(--ink-2);transform:translateY(-70%) rotate(45deg)}
.field input:hover,.field select:hover{border-color:var(--ink)}
.field input:focus-visible,.field select:focus-visible{outline-offset:0;outline-width:2px;border-color:var(--green)}
.field input::placeholder{color:var(--ink-2)}
.count{font:400 .8125rem/1 var(--mono);color:var(--ink-2);margin-left:auto}
.chipbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.chip{border:1px solid var(--line-strong);background:transparent;border-radius:999px;padding:9px 15px;
  font:600 .85rem/1 var(--sans);color:var(--ink-2);cursor:pointer;transition:all .14s var(--ease)}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--green);border-color:var(--green);color:var(--paper)}

/* Empty state --------------------------------------------------------------- */
.empty{padding:64px 24px;text-align:center}
.empty .fig{width:120px;margin:0 auto 18px;color:var(--ink-2)}
.empty h3{margin-bottom:8px}
.empty p{color:var(--ink-2);margin-bottom:18px}

/* Ideas grid ---------------------------------------------------------------- */
.ideas{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.idea{background:var(--card);border:1px solid var(--line-strong);border-radius:var(--r);padding:22px;display:flex;flex-direction:column;gap:12px}
.idea .fig{color:var(--ink)}
.idea .fig svg{width:84px}
.idea h3{font-size:1.3rem}
.idea p{font-size:.93rem;color:var(--ink-2)}
.spec{margin-top:auto;border-top:1px solid var(--line);padding-top:4px}
.spec div{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.85rem}
.spec div:last-child{border-bottom:0}
.spec dt{color:var(--ink-2)}
.spec dd{margin:0;font-family:var(--mono);font-weight:600;font-variant-numeric:tabular-nums}

/* Index method band ---------------------------------------------------------- */
.method{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,4vw,48px)}
.method article{border-top:1px solid color-mix(in srgb,var(--paper) 35%,transparent);padding-top:18px}
.method b{font:600 1.9rem/1 var(--mono);display:block;margin-bottom:10px;font-variant-numeric:tabular-nums}
.method h3{font-size:1.15rem;margin-bottom:8px}
.method p{font-size:.93rem}

/* Newsletter ---------------------------------------------------------------- */
.news{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,5vw,64px);align-items:center}
.news form{display:block}
.news input[type=email]{flex:1;min-height:52px;padding:0 16px;border:1px solid var(--line-strong);
  border-radius:var(--r);background:var(--card);font:500 1rem var(--sans);color:var(--ink)}
.news input[type=email]:focus-visible{border-color:var(--green);outline-offset:0}
.news .fineprint{margin-top:12px;font-size:.8125rem;color:var(--ink-2)}
.hp{position:absolute;left:-5000px}

/* Story page ---------------------------------------------------------------- */
.story-head{padding:clamp(56px,7vw,96px) 0 0}
.story-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.8fr);gap:clamp(32px,5vw,72px)}
.story-meta{position:sticky;top:96px;align-self:start}
.byline{display:flex;gap:14px;align-items:center;margin-top:22px;color:var(--ink-2);font-size:.9rem}
.byline .sig{width:34px;height:34px;border:1px solid var(--line-strong);border-radius:50%;
  display:grid;place-items:center;font:600 .8rem var(--serif);color:var(--green);background:var(--card)}
.prose{font-size:1.0925rem;line-height:1.72}
.prose h2{font-size:1.7rem;margin:1.8em 0 .5em}
.prose .opener::first-letter{font:500 3.4em/0.82 var(--serif);float:left;padding:6px 10px 0 0;color:var(--green)}
.pull{border-left:2px solid var(--green);margin:2em 0;padding:4px 0 4px 22px;
  font:500 italic 1.45rem/1.35 var(--serif);color:var(--ink)}
.pull cite{display:block;margin-top:10px;font:400 .8125rem var(--mono);font-style:normal;color:var(--ink-2)}
.pnl{border:1px solid var(--line-strong);border-radius:var(--r);background:var(--card);margin:2em 0}
.pnl caption,.pnl-cap{font:600 .8125rem var(--mono);text-align:left;padding:13px 16px;border-bottom:1px solid var(--line-strong)}
.pnl div{display:flex;justify-content:space-between;padding:11px 16px;border-bottom:1px solid var(--line);font-size:.93rem}
.pnl div:last-child{border-bottom:0}
.pnl dd{margin:0;font-family:var(--mono);font-weight:600;font-variant-numeric:tabular-nums}
.pnl .total{background:var(--paper-2)}
.pnl .total dd{color:var(--green)}
.neg{color:var(--red)}
.timeline{margin:0;padding:0;list-style:none}
.timeline li{display:grid;grid-template-columns:64px 1fr;gap:16px;padding:13px 0;border-bottom:1px solid var(--line);font-size:.93rem}
.timeline li:last-child{border-bottom:0}
.timeline b{font:600 .85rem/1.5 var(--mono);color:var(--green)}
.next{display:flex;justify-content:space-between;align-items:center;gap:24px;border:1px solid var(--line-strong);
  border-radius:var(--r);background:var(--card);padding:24px 26px;text-decoration:none;color:inherit;
  transition:border-color .15s,transform .18s var(--ease)}
.next:hover{border-color:var(--ink);transform:translateY(-2px)}

/* About / prose pages -------------------------------------------------------- */
.qa h2{font-size:1.55rem;margin:0 0 .5em}
.qa article{padding:30px 0;border-top:1px solid var(--line)}
.qa article:first-of-type{border-top:0;padding-top:0}
.qa p{color:var(--ink-2)}
.qa p b,.qa p strong{color:var(--ink)}

#cat-stats,#cat-means{display:block;padding:0}

/* Sponsor slot ---------------------------------------------------------------- */
.sponsor{background:var(--card);border:1px solid var(--line-strong);border-radius:var(--r);margin-top:18px}
.sponsor-cap{display:flex;justify-content:space-between;align-items:baseline;padding:11px 16px;border-bottom:1px solid var(--line-strong)}
.sponsor-cap b{font:600 .72rem/1 var(--mono);letter-spacing:.03em;color:var(--ink-2)}
.sponsor-cap span{font:400 .68rem/1 var(--mono);color:var(--ink-2)}
.sponsor-body{padding:14px 16px}
.sponsor-body b{font-size:.95rem}
.sponsor-body p{font-size:.85rem;color:var(--ink-2);margin:4px 0 8px}
.disclosure{font:400 .78rem/1.6 var(--mono);color:var(--ink-2);border-top:1px solid var(--line);padding-top:12px;margin-top:26px}

/* Footer ---------------------------------------------------------------------- */
footer{background:var(--green-deep);color:var(--paper);padding:clamp(48px,6vw,72px) 0 32px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:clamp(28px,5vw,64px);margin-bottom:44px}
.foot-grid p{font-size:.9rem;color:color-mix(in srgb,var(--paper) 70%,var(--green-deep))}
.foot-grid h4{font:600 .8125rem/1 var(--mono);letter-spacing:.02em;margin:0 0 14px;color:color-mix(in srgb,var(--paper) 60%,var(--green-deep))}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.foot-grid a{color:var(--paper);text-decoration:none;font-size:.95rem}
.foot-grid a:hover{text-decoration:underline;text-underline-offset:3px}
.foot-brand{display:flex;gap:10px;align-items:center;margin-bottom:16px}
.foot-brand svg{width:24px;height:24px;color:var(--paper)}
.foot-brand b{font:600 1.1rem var(--serif)}
.foot-legal{border-top:1px solid color-mix(in srgb,var(--paper) 22%,transparent);padding-top:22px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font:400 .78rem/1.5 var(--mono);color:color-mix(in srgb,var(--paper) 55%,var(--green-deep))}

/* Responsive ------------------------------------------------------------------ */
@media (max-width:980px){
  .hero .container{grid-template-columns:1fr;gap:44px}
  .hero-fig{display:none}
  .cards,.ideas{grid-template-columns:repeat(2,1fr)}
  .method{grid-template-columns:1fr;gap:26px}
  .news{grid-template-columns:1fr;gap:28px}
  .story-grid{grid-template-columns:1fr}
  .story-meta{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .cards,.ideas{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .news form{flex-direction:column}
  .hero-foot{gap:20px;flex-wrap:wrap}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}