/* ============================================================
   Oil, Visualized  ·  css/base.css
   Design tokens + shared chrome used by EVERY page:
   header, footer, wrap, hero, prose sections, callouts,
   glossary/term cards, ledger tables, utilities.
   Page-specific components live in their own stylesheet.
   ============================================================ */

/* ============ TOKENS ============ */
:root{
  --paper:#F4F2EC;
  --paper-2:#ECE9DF;
  --ink:#1B1A17;
  --muted:#6B675E;
  --hair:#D8D3C7;
  --hair-2:#C7C1B2;

  /* geological strata — the identity */
  --surface:#C8A45E;       /* ochre / topsoil */
  --surface-lite:#E7D3A8;
  --mineral:#243A35;       /* deep petroleum slate */
  --mineral-lite:#DBE3DE;

  /* owners */
  --carl:#B06A3B;          /* copper */
  --susan:#2F7E86;         /* teal */

  --survey:#A23A2A;        /* survey-corner red, used sparingly */

  /* semantic status pairs — shared by the clause dictionary and
     the regulator cards. ink colour + its tinted background. */
  --know:#4A5A55;      --know-bg:#E4E9E7;      /* neutral / vocabulary */
  --forc:#1D7A52;      --forc-bg:#E4EFE9;      /* good for the owner  */
  --confirm:#8A6A2E;   --confirm-bg:#F3EBDA;   /* read it carefully   */
  --flag:#A23A2A;      --flag-bg:#F5E6E3;      /* watch out           */

  --radius:10px;
  --radius-lg:16px;

  /* height of the sticky site header. glossary.css offsets its own
     sticky toolbar by this, so the two stay locked together. */
  --headh:62px;

  --display:"Bricolage Grotesque", system-ui, sans-serif;
  --body:"Spectral", Georgia, serif;
  --mono:"JetBrains Mono", ui-monospace, monospace;

  --maxw:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:clamp(1rem,0.96rem + 0.2vw,1.125rem);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit}
:focus-visible{outline:2.5px solid var(--survey);outline-offset:3px;border-radius:3px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1rem,4vw,3rem)}

.eyebrow{
  font-family:var(--mono);font-size:.72rem;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
}
.mono{font-family:var(--mono)}

/* ============ HEADER ============ */
header.site{
  position:sticky;top:0;z-index:60;
  background:color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--hair);
}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:var(--headh)}
/* the brand never shrinks and never wraps. it used to do both on a phone,
   which pushed lines out past the 62px bar and left them painted over the
   page below — the nav is the thing that scrolls, not the wordmark. */
.brand{flex:0 0 auto;display:flex;align-items:baseline;gap:.55rem;text-decoration:none}
.brand .mark{font-family:var(--display);font-weight:800;font-size:1.18rem;letter-spacing:-.01em;white-space:nowrap}
@media(max-width:520px){.brand .mark{font-size:1.06rem}}
/* The period in the wordmark. It shares a class name with the 9px round
   ledger legend swatch below, so every box property that rule sets has to
   be put back here — otherwise the period becomes an inline-block, which
   is a line-break opportunity, and it wraps onto a line of its own. */
.brand .mark .dot{
  color:var(--survey);
  display:inline;width:auto;height:auto;
  margin:0;border-radius:0;vertical-align:baseline;
}
.brand .sub{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.brand .sub.hide-sm{display:none}
.headnav{display:flex;align-items:center;gap:.5rem;flex:1 1 auto;justify-content:flex-end;
  min-width:0;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  touch-action:pan-x;overscroll-behavior-x:contain;padding:.25rem 0}
.headnav::-webkit-scrollbar{display:none}
.headnav .eyebrow.hide-sm{display:none}
@media(min-width:900px){.brand .sub.hide-sm,.headnav .eyebrow.hide-sm{display:inline}}
.navlink{flex:0 0 auto;font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  text-decoration:none;border:1px solid var(--hair-2);border-radius:20px;padding:.42rem .85rem;
  transition:background .15s,color .15s,border-color .15s;white-space:nowrap}
.navlink:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.navlink[aria-current="page"]{background:var(--mineral);color:var(--paper);border-color:var(--mineral)}

/* ============ HERO ============ */
.hero{padding:clamp(2.2rem,6vw,4.5rem) 0 clamp(1.5rem,3vw,2.5rem)}
.hero .eyebrow{margin-bottom:1.1rem}
.hero h1{
  font-family:var(--display);font-weight:800;
  font-size:clamp(2.2rem,1.4rem + 4.4vw,4.3rem);
  line-height:1.02;letter-spacing:-.025em;max-width:18ch;
}
.hero h1 em{font-style:normal;color:var(--survey)}
.hero p.lede{font-size:clamp(1.06rem,1rem + .4vw,1.3rem);max-width:54ch;margin-top:1.3rem;color:#322f29}

/* Reference pages (clause dictionary, regulator pages) run a smaller
   hero than the concept curriculum — more page below the fold. */
.hero.compact{padding:clamp(2rem,5vw,3.6rem) 0 clamp(1rem,2.5vw,1.6rem)}
.hero.compact h1{font-size:clamp(2rem,1.3rem + 3.6vw,3.6rem);line-height:1.04;max-width:20ch}
.hero.compact p.lede{font-size:clamp(1.02rem,1rem + .3vw,1.2rem);max-width:62ch;margin-top:1.2rem}

/* ============ LEDGER ============ */
.ledger-wrap{margin-top:3rem}
.ledger-wrap h2,.section h2{font-family:var(--display);font-weight:700;font-size:clamp(1.4rem,1.2rem+1vw,1.9rem);letter-spacing:-.02em}
.table-scroll{overflow-x:auto;margin-top:1.1rem;border:1px solid var(--hair);border-radius:var(--radius)}
table.ledger{width:100%;border-collapse:collapse;font-family:var(--mono);font-size:.82rem;min-width:520px}
table.ledger th,table.ledger td{text-align:left;padding:.7rem .9rem;border-bottom:1px solid var(--hair)}
table.ledger thead th{background:var(--paper-2);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
table.ledger td.r,table.ledger th.r{text-align:right}
table.ledger tr.tot td{border-top:2px solid var(--hair-2);font-weight:700;border-bottom:0;background:color-mix(in srgb,var(--paper-2) 60%, transparent)}
/* ledger legend swatch. NOTE: bare class name, so it also matches the
   period in the header wordmark — see the reset in .brand .mark .dot. */
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:.5rem;vertical-align:0}
.d-carl{background:var(--carl)}.d-susan{background:var(--susan)}

/* ============ PROSE SECTIONS ============ */
.section{padding:clamp(2.4rem,5vw,3.6rem) 0;border-top:1px solid var(--hair);margin-top:3rem}
.section:first-of-type{border-top:0}
.grid2{display:grid;grid-template-columns:1fr;gap:clamp(1.4rem,3vw,2.6rem);margin-top:1.4rem}
@media(min-width:760px){.grid2{grid-template-columns:1fr 1fr}}
.kicker{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--survey);margin-bottom:.5rem}
.section h3{font-family:var(--display);font-weight:600;font-size:1.25rem;margin-bottom:.5rem;letter-spacing:-.01em}
.section p+p{margin-top:.8rem}

.callout{
  margin-top:1.6rem;border:1px solid var(--hair-2);border-left:4px solid var(--survey);
  border-radius:0 var(--radius) var(--radius) 0;background:var(--paper-2);padding:1.2rem 1.4rem;
}
.callout .kicker{color:var(--survey)}
.callout strong{font-weight:500}

/* ============ FOOTER ============ */
footer.site{border-top:1px solid var(--hair);margin-top:4rem;padding:2.2rem 0 3rem;color:var(--muted)}
footer.site .row{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:.72rem;letter-spacing:.04em}
footer.site .disc{max-width:66ch;font-family:var(--body);font-size:.86rem;margin-top:1rem;font-style:italic}

/* ============ TERM / GLOSSARY CARDS ============ */
.glossary{display:grid;grid-template-columns:1fr;gap:12px;margin-top:1.6rem}
@media(min-width:620px){.glossary{grid-template-columns:1fr 1fr}}
.term{border:1px solid var(--hair);border-left:4px solid var(--surface);border-radius:0 var(--radius) var(--radius) 0;background:var(--paper-2);padding:.9rem 1.1rem}
.term .t{display:block;font-family:var(--display);font-weight:700;font-size:1rem;margin-bottom:.2rem}
.term .d{display:block;font-size:.92rem;color:#3a372f;line-height:1.5}

/* ============ FOOTER LINKS & VERSION STAMP ============ */
.support-foot{font-style:normal!important;margin-top:.9rem}
.support-foot a{color:var(--survey);text-decoration:underline}

.foot-ver{font-style:normal!important;margin-top:.5rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;opacity:.75}

/* ============ UTILITY ============ */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}

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