/* Rune & Silver — "The honest rate. Carved in stone."
   Palette: cool stone light (ash, paper, hairline greys — no warm cream), granite, rune red, hacksilver, moss.
   Type: system fonts only (no downloads). Serif "inscription" stack for the brand voice, system UI for interface. */
:root{
  --bone:#f4f6f8;--ash:#f1f3f5;--paper:#ffffff;--granite:#1b1f23;--granite-2:#262b30;--slate:#5c636b;--rule:#e4e7eb;
  --rune:#b4381f;--rune-lit:#c8432b;--rune-wash:#e7edf2;--silver:#a3aab0;--silver-lit:#d6d9dc;--moss:#36684b;
  --bg:var(--ash);--card:var(--paper);--ink:var(--granite);--muted:var(--slate);--line:var(--rule);
  --accent:var(--rune);--accent2:var(--rune-wash);--neg:var(--rune);--pos:var(--moss);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua","URW Palladio L",P052,Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  font:16px/1.55 var(--sans)
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--ink);text-decoration-color:var(--accent);text-decoration-thickness:1.5px;text-underline-offset:.18em}
a:hover{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* ---- chrome ---- */
.top{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.75rem clamp(1rem,4vw,2rem);background:var(--granite);color:var(--bone)}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--bone)}
.brand:hover{color:var(--bone)}
.mark{flex:none;display:block}
.wordmark{font-family:var(--serif);font-weight:600;text-transform:uppercase;letter-spacing:.2em;white-space:nowrap}
.brand .wordmark{font-size:1.2rem}
.top nav{display:flex;flex-wrap:wrap;gap:.2rem 1.4rem}
.top nav a{color:var(--silver-lit);text-decoration:none;font-size:.8rem;text-transform:uppercase;letter-spacing:.12em}
.top nav a:hover{color:#fff;box-shadow:0 2px 0 var(--rune-lit)}
main,.page{display:block;max-width:980px;margin:0 auto;padding:1.2rem clamp(1rem,3vw,1.5rem)}
footer.site{background:var(--granite);color:var(--silver-lit);margin-top:3rem;font-size:.85rem}
footer.site .foot{max-width:980px;margin:0 auto;padding:2rem clamp(1rem,3vw,1.5rem) 2.5rem}
footer.site a{color:var(--bone)}
footer.site .muted{color:var(--silver)}
.foot-brand{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem;color:var(--bone);margin-top:0}
.foot-brand .wordmark{font-size:1rem}
/* ---- type ---- */
h1,h2{font-family:var(--serif);font-weight:600;letter-spacing:-.005em;line-height:1.15}
h1{font-size:clamp(1.9rem,4.2vw,2.6rem);margin:1rem 0 .5rem}
h2{margin:.2rem 0 .8rem;font-size:1.3rem}
.muted,.source{color:var(--muted);font-size:.9rem}
.lede{font-family:var(--serif);font-size:1.4rem;margin:.3rem 0}
.lede strong{color:var(--accent)}
.eyebrow{font-size:.75rem;text-transform:uppercase;letter-spacing:.22em;color:var(--silver);margin:0 0 .8rem}
/* ---- surfaces ---- */
.card{background:var(--card);border:1px solid var(--line);border-radius:4px;padding:1.1rem 1.3rem;margin:1.2rem 0;box-shadow:0 1px 0 rgba(27,31,35,.04)}
.page>.card:first-of-type,.page>h1+p+.source+.card{border-top:3px solid var(--accent)}
/* ---- hero (landing) ---- */
.hero{position:relative;overflow:hidden;background:var(--granite);color:var(--bone);padding:clamp(2rem,6vw,4.5rem) clamp(1rem,4vw,2rem) clamp(2.2rem,5vw,3.5rem);border-bottom:3px solid var(--rune)}
.hero-in{position:relative;max-width:980px;margin:0 auto}
.hero h1{font-size:clamp(2.4rem,6.5vw,4.4rem);margin:0 0 .9rem;color:var(--bone);letter-spacing:-.015em;line-height:1.04}
.hero-sub{max-width:36rem;font-size:1.1rem;color:var(--silver-lit);margin:0 0 1.8rem}
.route{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.5}
.route path{fill:none;stroke:var(--silver);stroke-width:1.2;stroke-dasharray:2 7;stroke-linecap:round}
.route circle{fill:var(--rune-lit)}
.route .lbl{fill:var(--silver);font:10px var(--sans);letter-spacing:.2em}
.hero .card{color:var(--ink);border:0;border-top:3px solid var(--rune);box-shadow:0 18px 50px rgba(0,0,0,.35);margin:0}
.hero [data-turnstile]{margin-top:.6rem}
.tenets{list-style:none;padding:0;margin:1.6rem 0 .4rem;display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.tenets li{border-top:1px solid var(--ink);padding-top:.7rem}
.tenets b{display:block;font-family:var(--serif);font-size:1.15rem;margin-bottom:.2rem}
.tenets b::before{content:"";display:inline-block;width:.5rem;height:.5rem;background:var(--accent);transform:rotate(45deg);margin:0 .55rem .12rem 0}
.tenets span{color:var(--muted);font-size:.92rem}
/* ---- converter ---- */
.conv{display:grid;grid-template-columns:1.2fr 1fr auto 1fr;gap:.7rem;align-items:end}
.conv label{min-width:0;display:flex;flex-direction:column;font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);gap:.3rem}
.conv input,.conv select,.toolbar select{width:100%;min-width:0;font:inherit;font-size:1rem;letter-spacing:0;text-transform:none;padding:.6rem .7rem;border:1px solid var(--line);border-radius:3px;background:#fff;color:var(--ink)}
.conv input{font-family:var(--serif);font-size:1.25rem;font-variant-numeric:tabular-nums lining-nums;padding:.42rem .7rem}
.conv input:focus,.conv select:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 3px var(--accent2)}
.toolbar select{width:auto;padding:.3rem .5rem;font-size:.85rem}
button{font:inherit;font-size:.9rem;padding:.45rem .8rem;border:1px solid var(--line);border-radius:3px;background:#fff;color:var(--ink);cursor:pointer}
button:hover{border-color:var(--ink)}
button.on{background:var(--ink);color:var(--bone);border-color:var(--ink);box-shadow:inset 0 -2px 0 var(--rune-lit)}
.swap{font-size:1.1rem;padding:.55rem .8rem}
.swap:hover{color:var(--accent)}
.result{font-family:var(--serif);font-size:clamp(1.7rem,4vw,2.4rem);font-weight:600;letter-spacing:-.01em;font-variant-numeric:tabular-nums lining-nums;margin:.9rem 0 .2rem;line-height:1.15}
.err{color:var(--neg)}
.toolbar{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;margin-bottom:.6rem}
.toolbar .spacer{flex:1}
.source strong{color:var(--ink)}
/* ---- charts & tables ---- */
.chart{width:100%;height:280px;display:block;touch-action:none;color:var(--accent)}
.chart .line{fill:none;stroke:var(--accent);stroke-width:1.7;stroke-linejoin:round}
.chart .area{fill:var(--accent2);opacity:.75}
.chart .grid{stroke:var(--line)}
.chart text{fill:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}
.chart .cross{stroke:var(--ink);stroke-dasharray:2 4}
.stats{display:flex;flex-wrap:wrap;gap:1.2rem;font-size:.9rem;color:var(--muted);margin:.5rem 0}
.stats b{color:var(--ink);font-variant-numeric:tabular-nums}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th{font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:600;border-bottom:1px solid var(--ink)}
th,td{padding:.45rem .5rem;text-align:left}
td{border-bottom:1px solid var(--line)}
.num{text-align:right;font-variant-numeric:tabular-nums}
.pos{color:var(--pos)}.negv{color:var(--neg)}
.scroll{max-height:360px;overflow:auto}
.chips{display:flex;flex-wrap:wrap;gap:.45rem;align-items:center}
.chip{display:inline-block;padding:.3rem .8rem;border:1px solid var(--line);border-radius:2px;background:var(--card);text-decoration:none;color:var(--ink);font-size:.9rem}
.chip:hover{border-color:var(--ink);color:var(--ink);box-shadow:inset 0 -2px 0 var(--accent)}
pre,code{font-family:var(--mono)}
pre{background:var(--granite);color:var(--silver-lit);padding:.9rem 1rem;border-radius:3px;overflow:auto;font-size:.82rem;border-left:3px solid var(--rune)}
code{font-size:.88em;background:var(--accent2);padding:.05em .3em;border-radius:2px}
pre code{background:none;padding:0}
@media (max-width:640px){
  .conv{grid-template-columns:1fr auto 1fr;gap:.5rem}
  .conv .amt{grid-column:1/-1}
  .conv .swap{padding:.55rem .6rem}
  .tenets{grid-template-columns:1fr;gap:.9rem}
  .top{flex-wrap:wrap;align-items:center;gap:.55rem 1rem;padding:.7rem 1rem .65rem}
  .brand .wordmark{font-size:1rem;letter-spacing:.12em}
  .top nav{flex:1 0 100%;flex-wrap:nowrap;justify-content:flex-start;gap:1rem 1.25rem}
  .top nav a{font-size:.72rem;letter-spacing:.1em}
  .route{display:none}
}
/* ---- embeds (/embed/*) ---- */
body.embed{background:transparent;margin:0;padding:2px}
body.embed .card{margin:0 0 .5rem;padding:.85rem 1rem;border-top:2px solid var(--accent)}
body.embed .result{font-size:1.6rem}
.attribution{display:flex;flex-wrap:wrap;align-items:center;gap:.25rem .6rem;font-size:.72rem;color:var(--muted);margin:.25rem .2rem 0}
.attribution .by{display:inline-flex;align-items:center;gap:.3rem;text-decoration:none;color:var(--ink)}
.attribution .by .mark{color:var(--ink)}
.attribution .wordmark{font-size:.72rem;letter-spacing:.18em}
.attribution .by:hover .wordmark{color:var(--accent)}
body.theme-dark{--bg:#121416;--card:#1b1f23;--ink:#f4f6f8;--muted:#9ba2a9;--line:#2e3439;--accent:#e0644a;--accent2:#3a221c;--neg:#ef7a62;--pos:#7fbf98}
body.theme-dark input,body.theme-dark select,body.theme-dark button,body.theme-dark .chip{background:#23282d;color:var(--ink)}
body.theme-dark button.on{background:var(--ink);color:#121416}
@media (prefers-color-scheme:dark){
  body.theme-auto{--bg:#121416;--card:#1b1f23;--ink:#f4f6f8;--muted:#9ba2a9;--line:#2e3439;--accent:#e0644a;--accent2:#3a221c;--neg:#ef7a62;--pos:#7fbf98}
  body.theme-auto input,body.theme-auto select,body.theme-auto button,body.theme-auto .chip{background:#23282d;color:var(--ink)}
  body.theme-auto button.on{background:var(--ink);color:#121416}
}
[data-turnstile]{margin-top:.5rem}
[data-turnstile]:empty{margin:0}
/* ---- progressive loading ---- */
.loading{opacity:.55;transition:opacity .15s ease .1s}
.chart-skeleton{border-radius:3px;background:linear-gradient(90deg,var(--line) 0%,var(--card) 50%,var(--line) 100%);background-size:200% 100%;animation:vskel 1.2s ease-in-out infinite;opacity:.6}
@keyframes vskel{0%{background-position:100% 0}100%{background-position:-100% 0}}
@media (prefers-reduced-motion:reduce){.chart-skeleton{animation:none}.loading{transition:none}}