/* =========================================================================
   CAST IRON & CHALK — home-gym storefront
   One brand hue (brass, H33) + black/white neutrals. IBM Plex superfamily.
   Spacing scale 4/8/12/16/24/32/40/48/64. 12-col grid. WCAG AA verified.
   ========================================================================= */

:root{
  /* --- neutrals --- */
  --paper:#E7E8E4;        /* page background (cool putty, not cream) */
  --panel:#F2F2EF;        /* raised panels / cards */
  --spine:#1C1E21;        /* dark navigation rail */
  --spine-line:#34373C;   /* dividers on the rail */
  --ink:#17181A;          /* text-strong        14.4:1 on paper */
  --slate:#464B52;        /* text-secondary      7.1:1 on paper */
  --line:#C4C6C1;         /* hairline, decorative */
  --line-strong:#787A75;  /* meaningful / form borders  3.5:1 */

  /* --- brand hue: brass, H33 (~5 HSB steps) --- */
  --brass:#85551B;        /* strong  — links, buttons, accents  5.2:1 */
  --brass-dark:#573B18;   /* dark text on light                 8.3:1 */
  --brass-mid:#997140;    /* on the dark rail (large only)      3.8:1 */
  --brass-soft:#D6BD9F;   /* tint fills, tags, tick marks */
  --brass-weak:#EDE0D1;   /* faint wash */
  --on-brass:#FFFFFF;     /* text on brass fills                6.3:1 */

  /* --- spacing scale --- */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px;
  --s6:32px; --s7:40px; --s8:48px; --s9:64px;

  /* --- type scale (base 16, ratio ~1.2) --- */
  --t-tiny:13px; --t-small:14px; --t-body:16px;
  --t-h4:20px; --t-h3:24px; --t-h2:32px; --t-h1:40px;

  --rail:248px;   /* width of the fixed navigation spine */
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:var(--t-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:var(--brass);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--brass);outline-offset:2px;border-radius:2px}

.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace}
.eyebrow{
  font-family:"IBM Plex Mono",monospace;
  font-size:var(--t-tiny);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--brass-dark);
}
.display{
  font-family:"IBM Plex Sans Condensed","IBM Plex Sans",sans-serif;
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.08;
  color:var(--ink);
  margin:0;
}
h1.display{font-size:clamp(40px,6vw,64px)}
h2.display{font-size:var(--t-h2);line-height:1.12}
h3.display{font-size:var(--t-h3);line-height:1.16}

/* =========================================================================
   SHELL — fixed dark "spine" nav on the left, scrolling content on the right
   ========================================================================= */
.shell{min-height:100vh}

.spine{
  position:fixed;inset:0 auto 0 0;width:var(--rail);
  background:var(--spine);color:#fff;
  display:flex;flex-direction:column;
  padding:var(--s6) var(--s5);
  z-index:40;
}
.spine__brand{
  font-family:"IBM Plex Sans Condensed",sans-serif;
  font-weight:700;font-size:var(--t-h3);letter-spacing:.02em;color:#fff;
  line-height:1.1;
}
.spine__brand:hover{text-decoration:none;color:var(--brass-soft)}
.spine__tag{
  margin-top:var(--s2);
  font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);
  color:var(--brass-soft);letter-spacing:.08em;
}

/* calibrated tick index — the signature element */
.railnav{margin-top:var(--s8);border-left:2px solid var(--spine-line);padding-left:var(--s4)}
.railnav a{
  display:flex;align-items:baseline;gap:var(--s3);
  color:#EDEDEA;padding:var(--s3) 0;
  min-height:48px;position:relative;font-size:var(--t-body);
}
.railnav a::before{
  content:"";position:absolute;left:calc(-1*var(--s4) - 2px);top:50%;
  width:var(--s3);height:2px;background:var(--brass-mid);transform:translateY(-50%);
}
.railnav a:hover{text-decoration:none;color:#fff}
.railnav a:hover::before{width:var(--s5);background:var(--brass-soft)}
.railnav .n{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:var(--brass-soft);min-width:22px}
.railnav .c{margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:#9A9C97}

.spine__foot{margin-top:auto;padding-top:var(--s6);display:flex;flex-direction:column;gap:var(--s4)}
.spine__foot .lbl{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:#9A9C97;letter-spacing:.1em;text-transform:uppercase}

/* currency segmented control */
.cur{display:inline-flex;border:1px solid var(--line-strong);border-radius:2px;overflow:hidden;width:max-content}
.cur button{
  font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);
  min-height:48px;min-width:64px;padding:0 var(--s4);
  background:transparent;color:#EDEDEA;border:0;cursor:pointer;
}
.cur button+button{border-left:1px solid var(--line-strong)}
.cur button[aria-pressed="true"]{background:var(--brass);color:var(--on-brass)}

/* mobile top bar (hidden on desktop) */
.topbar{display:none}

.content{margin-left:var(--rail);padding:var(--s8) var(--s7) var(--s9)}
.wrap{max-width:var(--maxw);margin:0 auto}

/* =========================================================================
   12-COLUMN GRID
   ========================================================================= */
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--s5)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* =========================================================================
   OPENING — statement + ledger, then a single specimen (no stock hero)
   ========================================================================= */
.opening{align-items:end;margin-bottom:var(--s9)}
.opening__lead{max-width:60ch}
.opening h1{margin-top:var(--s4)}
.opening p.stand{margin:var(--s5) 0 0;color:var(--slate);font-size:var(--t-h4);line-height:1.5;max-width:52ch}

.ledger{margin-top:var(--s7);border-top:2px solid var(--ink)}
.ledger a{
  display:grid;grid-template-columns:28px 1fr auto auto;gap:var(--s4);align-items:baseline;
  padding:var(--s4) 0;border-bottom:1px solid var(--line);color:var(--ink);min-height:48px;
}
.ledger a:hover{text-decoration:none;background:var(--brass-weak)}
.ledger .k{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:var(--brass-dark)}
.ledger .name{font-family:"IBM Plex Sans Condensed",sans-serif;font-weight:600;font-size:var(--t-h4)}
.ledger .range{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--slate)}
.ledger .go{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--brass)}

/* specimen card at right of the opening */
.specimen{background:var(--panel);border:1px solid var(--line);padding:var(--s5);position:relative}
.specimen .stamp{
  position:absolute;top:var(--s4);right:var(--s4);
  font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);letter-spacing:.1em;
  color:var(--brass-dark);border:1px solid var(--brass-soft);background:var(--brass-weak);
  padding:var(--s1) var(--s2);text-transform:uppercase;
}
.specimen figure{margin:0}
.specimen .ph{aspect-ratio:4/3;width:100%}
.specimen h3{margin:var(--s4) 0 var(--s2)}
.specimen .spec{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--slate)}
.specimen .row{display:flex;align-items:center;justify-content:space-between;margin-top:var(--s4);gap:var(--s4)}
.specimen .price{font-family:"IBM Plex Mono",monospace;font-size:var(--t-h3);font-weight:500}

/* =========================================================================
   BUTTONS — primary(filled) / secondary(outline) / tertiary(text)
   left-aligned, target ≥48
   ========================================================================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--s2);
  min-height:48px;padding:0 var(--s5);cursor:pointer;
  font-family:"IBM Plex Sans",sans-serif;font-size:var(--t-body);font-weight:600;
  border-radius:2px;border:1px solid transparent;text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn--primary{background:var(--brass);color:var(--on-brass);border-color:var(--brass)}
.btn--primary:hover{background:var(--brass-dark);border-color:var(--brass-dark)}
.btn--secondary{background:transparent;color:var(--brass-dark);border-color:var(--line-strong)}
.btn--secondary:hover{border-color:var(--brass);background:var(--brass-weak)}
.btn--tertiary{background:transparent;color:var(--brass-dark);padding:0 var(--s2)}
.btn--tertiary:hover{text-decoration:underline}

/* =========================================================================
   CATEGORY SECTIONS + PRODUCT GRID
   ========================================================================= */
.section{scroll-margin-top:var(--s5);margin-top:var(--s9)}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:var(--s5);
  border-bottom:2px solid var(--ink);padding-bottom:var(--s4);margin-bottom:var(--s6);
}
.section__head .no{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--brass-dark);display:block;margin-bottom:var(--s2);letter-spacing:.12em}
.section__head .note{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--slate);text-align:right;max-width:34ch}

.cards{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--s5)}
.card{grid-column:span 4;background:var(--panel);border:1px solid var(--line);display:flex;flex-direction:column}
.card__media{position:relative;aspect-ratio:4/3;background:var(--brass-weak);overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover}
.card__tag{
  position:absolute;left:0;bottom:0;
  font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);letter-spacing:.06em;
  background:var(--ink);color:#fff;padding:var(--s1) var(--s3);
}
.card__body{padding:var(--s4);display:flex;flex-direction:column;gap:var(--s2);flex:1}
.card__name{font-family:"IBM Plex Sans Condensed",sans-serif;font-weight:600;font-size:var(--t-h4);color:var(--ink)}
.card__spec{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:var(--brass-dark);letter-spacing:.04em}
.card__desc{font-size:var(--t-small);color:var(--slate);line-height:1.55}
.card__foot{display:flex;align-items:center;justify-content:space-between;gap:var(--s3);margin-top:auto;padding-top:var(--s3)}
.card__price{font-family:"IBM Plex Mono",monospace;font-size:var(--t-h4);font-weight:500;color:var(--ink)}
.card__price s{color:var(--slate);font-size:var(--t-small);font-weight:400;margin-left:var(--s2)}

/* placeholder pattern (used until generated images exist) */
.ph{
  width:100%;height:100%;
  background:
    repeating-linear-gradient(90deg,transparent 0 22px,rgba(87,59,24,.10) 22px 23px),
    var(--brass-weak);
  display:flex;align-items:center;justify-content:center;text-align:center;
  color:var(--brass-dark);font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);
  letter-spacing:.06em;padding:var(--s4);
}

/* =========================================================================
   SPEC STRIP — editorial band between sections
   ========================================================================= */
.strip{
  margin-top:var(--s9);background:var(--spine);color:#fff;
  padding:var(--s7);border-radius:2px;
}
.strip h2{color:#fff;max-width:24ch}
.strip .facts{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--s5);margin-top:var(--s6)}
.strip .fact{grid-column:span 4;border-top:2px solid var(--brass-mid);padding-top:var(--s4)}
.strip .fact .num{font-family:"IBM Plex Mono",monospace;font-size:var(--t-h2);color:var(--brass-soft);font-weight:500}
.strip .fact .lbl{margin-top:var(--s2);color:#D8D9D6;font-size:var(--t-small);line-height:1.55}

/* =========================================================================
   POLICY PAGES
   ========================================================================= */
.doc{max-width:74ch;margin:0 auto}
.doc .eyebrow{display:block;margin-bottom:var(--s3)}
.doc h1.display{margin-bottom:var(--s3)}
.doc .updated{font-family:"IBM Plex Mono",monospace;font-size:var(--t-small);color:var(--slate);margin:0 0 var(--s7)}
.doc h2{font-family:"IBM Plex Sans Condensed",sans-serif;font-weight:600;font-size:var(--t-h3);margin:var(--s8) 0 var(--s3);color:var(--ink)}
.doc h3{font-size:var(--t-h4);margin:var(--s6) 0 var(--s2);font-weight:600}
.doc p{margin:0 0 var(--s4);color:var(--ink)}
.doc ul{margin:0 0 var(--s4);padding-left:var(--s5)}
.doc li{margin-bottom:var(--s2)}
.doc a{color:var(--brass-dark);text-decoration:underline}
.doc .callout{background:var(--panel);border-left:3px solid var(--brass);padding:var(--s4) var(--s5);margin:0 0 var(--s6);color:var(--slate)}
.doc table{width:100%;border-collapse:collapse;margin:0 0 var(--s5)}
.doc th,.doc td{text-align:left;padding:var(--s3);border-bottom:1px solid var(--line);vertical-align:top;font-size:var(--t-small)}
.doc th{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);text-transform:uppercase;letter-spacing:.08em;color:var(--brass-dark)}

/* =========================================================================
   FOOTER
   ========================================================================= */
.foot{margin-top:var(--s9);border-top:2px solid var(--ink);padding-top:var(--s6)}
.foot .grid{gap:var(--s6)}
.foot h4{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);letter-spacing:.1em;text-transform:uppercase;color:var(--brass-dark);margin:0 0 var(--s3)}
.foot p,.foot li{font-size:var(--t-small);color:var(--slate);line-height:1.6;margin:0 0 var(--s2)}
.foot ul{list-style:none;margin:0;padding:0}
.foot a{color:var(--slate)}
.foot a:hover{color:var(--brass-dark)}
.foot .legal{grid-column:span 5}
.foot .nav{grid-column:span 3}
.foot .reach{grid-column:span 4}
.foot__base{margin-top:var(--s7);padding-top:var(--s4);border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:var(--s4);flex-wrap:wrap}
.foot__base span{font-family:"IBM Plex Mono",monospace;font-size:var(--t-tiny);color:var(--slate)}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width:1080px){
  .card{grid-column:span 6}
  .strip .fact{grid-column:span 6}
}
@media (max-width:860px){
  :root{--rail:0px}
  .spine{position:static;width:auto;flex-direction:row;align-items:center;
    padding:var(--s4) var(--s5);gap:var(--s4)}
  .spine__tag,.railnav,.spine__foot .lbl{display:none}
  .spine__foot{margin:0 0 0 auto;padding:0;flex-direction:row;align-items:center}
  .railnav{display:none}
  .content{margin-left:0;padding:var(--s6) var(--s5) var(--s8)}
  .opening .col-7,.opening .col-5{grid-column:span 12}
  .foot .legal,.foot .nav,.foot .reach{grid-column:span 12}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
}
@media (max-width:560px){
  .card{grid-column:span 12}
  .strip .fact{grid-column:span 12}
  .ledger a{grid-template-columns:24px 1fr auto;row-gap:var(--s1)}
  .ledger .range{grid-column:2 / -1}
  .section__head{flex-direction:column;align-items:flex-start;gap:var(--s3)}
  .section__head .note{text-align:left}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}
html{scroll-behavior:smooth}