/* DesignedWire — global.css v2 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
img,svg{max-width:100%;display:block}

:root{
  --white:#FFFFFF;--off:#F7F5F2;--off2:#F0EDE8;
  --border:#E6E1D9;--border-s:#EDE9E3;
  --text:#0F0D0C;--mid:#4A4540;--muted:#8C8078;
  --copper:#C0621A;--copper-d:#A3511A;--copper-l:#FDF0E6;--copper-m:#FDDFC4;
  --green:#1A5E3A;--green-l:#EBF5EF;--green-m:#A7F3D0;
  --amber:#B45309;--amber-l:#FEF3C7;
  --red:#C0392B;--red-l:#FEF2F2;
  --mono:'JetBrains Mono',ui-monospace,monospace;
  --sans:'Inter',system-ui,-apple-system,sans-serif;
  --r:10px;--rs:6px;
  /* Button tokens */
  --btn-h:44px;
  --btn-r:8px;
  --btn-fz:14px;
  --btn-fw:600;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--white);color:var(--text);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-0.02em;color:var(--text)}
a{color:var(--copper);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--copper);outline-offset:3px;border-radius:3px}
.container{width:100%;max-width:1060px;margin-inline:auto;padding-inline:24px}
@media(min-width:640px){.container{padding-inline:32px}}

/* ═══════════════════════════════════
   NAV — clean 2-action system
═══════════════════════════════════ */
.nav{
  position:sticky;top:0;z-index:200;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex;align-items:center;
  height:60px;padding-inline:24px;
  max-width:1060px;margin-inline:auto;gap:0;
}
.nav-logo{
  display:flex;align-items:center;gap:9px;
  text-decoration:none;color:var(--text);
  font-weight:700;font-size:15px;letter-spacing:-.02em;
  flex-shrink:0;margin-right:28px;
}
.nav-logo:hover{text-decoration:none}
.nav-mark{
  width:28px;height:28px;border-radius:7px;
  background:var(--copper);display:grid;place-items:center;flex-shrink:0;
}
.nav-links{display:none;align-items:center;gap:2px;flex:1}
@media(min-width:768px){.nav-links{display:flex}}
.nav-links a{
  color:var(--mid);text-decoration:none;
  font-size:13.5px;font-weight:500;
  padding:6px 10px;border-radius:6px;
  transition:color .12s,background .12s;white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:var(--off);text-decoration:none}
.nav-links a.active{color:var(--copper);background:var(--copper-l)}

/* Nav actions — only 2 elements */
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto}

/* ═══════════════════════════════════
   BUTTON SYSTEM — 2 clear variants
   .btn  = primary (copper fill)
   .btn-s = secondary (outline)
   Size modifiers: default | .btn-lg | .btn-sm
═══════════════════════════════════ */
.btn,.btn-s{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  height:var(--btn-h);padding-inline:20px;
  border-radius:var(--btn-r);
  font-family:var(--sans);font-size:var(--btn-fz);font-weight:var(--btn-fw);
  letter-spacing:-.01em;white-space:nowrap;
  text-decoration:none;cursor:pointer;border:1.5px solid transparent;
  transition:background .14s,color .14s,border-color .14s,box-shadow .14s;
  line-height:1;
}
/* Primary */
.btn{
  background:var(--copper);color:#fff;border-color:var(--copper);
  box-shadow:0 1px 2px rgba(192,98,26,.15);
}
.btn:hover{background:var(--copper-d);border-color:var(--copper-d);text-decoration:none;color:#fff;box-shadow:0 3px 10px rgba(192,98,26,.25)}
.btn:active{transform:translateY(1px)}
/* Secondary / outline */
.btn-s{
  background:var(--white);color:var(--text);
  border-color:var(--border);box-shadow:0 1px 2px rgba(0,0,0,.04);
}
.btn-s:hover{background:var(--off);border-color:var(--muted);text-decoration:none;color:var(--text)}
.btn-s:active{transform:translateY(1px)}
/* Size variants */
.btn-lg,.btn-s.btn-lg{height:50px;padding-inline:28px;font-size:15px;border-radius:10px}
.btn-sm,.btn-s.btn-sm{height:36px;padding-inline:14px;font-size:13px;border-radius:6px}
/* Legacy aliases — keep old class names working */
.btn-cta{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:var(--btn-h);padding-inline:20px;border-radius:var(--btn-r);font-size:var(--btn-fz);font-weight:var(--btn-fw);background:var(--copper);color:#fff;border:1.5px solid var(--copper);text-decoration:none;white-space:nowrap;transition:background .14s,border-color .14s}
.btn-cta:hover{background:var(--copper-d);border-color:var(--copper-d);text-decoration:none;color:#fff}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:var(--btn-h);padding-inline:16px;border-radius:var(--btn-r);font-size:var(--btn-fz);font-weight:500;background:var(--white);color:var(--text);border:1.5px solid var(--border);text-decoration:none;white-space:nowrap;transition:background .14s,border-color .14s,color .14s}
.btn-outline:hover{background:var(--off);border-color:var(--muted);text-decoration:none;color:var(--text)}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:50px;padding-inline:28px;border-radius:10px;font-size:15px;font-weight:700;background:var(--copper);color:#fff;border:1.5px solid var(--copper);text-decoration:none;white-space:nowrap;transition:background .14s}
.btn-primary:hover{background:var(--copper-d);text-decoration:none;color:#fff}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:50px;padding-inline:24px;border-radius:10px;font-size:15px;font-weight:500;background:var(--white);color:var(--text);border:1.5px solid var(--border);text-decoration:none;white-space:nowrap;transition:background .14s,border-color .14s}
.btn-ghost:hover{background:var(--off);border-color:var(--muted);text-decoration:none;color:var(--text)}

/* ── MOBILE NAV ── */
.nav-burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:4px 6px;border:none;background:none;cursor:pointer;flex-shrink:0;margin-left:8px}
.nav-burger span{display:block;height:1.5px;background:var(--mid);border-radius:2px;transition:transform .2s,opacity .2s}
@media(min-width:768px){.nav-burger{display:none}}
.nav-mobile{display:none;position:fixed;inset:0;top:60px;background:var(--white);border-top:1px solid var(--border);z-index:199;padding:24px 24px 32px;flex-direction:column;gap:4px;overflow-y:auto}
.nav-mobile.open{display:flex}
.nav-mobile a{display:block;color:var(--text);text-decoration:none;font-size:16px;font-weight:500;padding:13px 8px;border-bottom:1px solid var(--border-s)}
.nav-mobile a:last-child{border-bottom:none}
.nav-mobile .btn,.nav-mobile .btn-cta{margin-top:20px;width:100%;justify-content:center;padding:14px;font-size:15px;height:auto}

/* ── BREADCRUMB ── */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);text-decoration:none}.breadcrumb a:hover{color:var(--copper)}
.breadcrumb-sep{color:var(--border)}

/* ── PROSE ── */
.prose h2{font-size:clamp(20px,2.5vw,28px);font-weight:700;margin:48px 0 14px;letter-spacing:-.02em;scroll-margin-top:80px}
.prose h3{font-size:clamp(17px,2vw,21px);font-weight:600;margin:32px 0 12px;scroll-margin-top:80px}
.prose p{font-size:15.5px;color:var(--mid);line-height:1.82;margin-bottom:16px;max-width:70ch}
.prose strong{color:var(--text);font-weight:600}
.prose a{color:var(--copper)}
.prose ul,.prose ol{padding-left:22px;margin-bottom:16px}
.prose li{font-size:15.5px;color:var(--mid);line-height:1.8;margin-bottom:8px;max-width:68ch}
.prose li strong{color:var(--text)}

/* ── CALLOUTS ── */
.callout{border-radius:var(--r);padding:18px 22px;margin:24px 0}
.callout.info{background:var(--copper-l);border:1px solid var(--copper-m)}
.callout.warn{background:var(--amber-l);border:1px solid #FDE68A}
.callout.ok{background:var(--green-l);border:1px solid var(--green-m)}
.callout.neutral{background:var(--off);border:1px solid var(--border)}
.callout-title{font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}
.callout.info .callout-title{color:var(--copper)}.callout.warn .callout-title{color:var(--amber)}.callout.ok .callout-title{color:var(--green)}.callout.neutral .callout-title{color:var(--muted)}
.callout p{font-size:14.5px;color:var(--mid);line-height:1.7;max-width:none;margin:0}.callout p+p{margin-top:8px}.callout p strong{color:var(--text)}

/* ── FORMULA / CODE ── */
.formula{font-family:var(--mono);font-size:clamp(14px,1.8vw,18px);color:var(--copper);background:var(--copper-l);border:1px solid var(--copper-m);border-radius:var(--r);padding:16px 20px;margin:20px 0;font-weight:700;overflow-x:auto;display:block;line-height:1.7}
.formula-var{display:block;font-size:13px;font-weight:400;color:var(--mid);margin-top:10px;line-height:1.9}
.formula-var span{display:block}
code{font-family:var(--mono);font-size:13px;background:var(--off);border:1px solid var(--border);border-radius:4px;padding:1px 6px;color:var(--mid)}
.nec-ref{display:inline-block;font-family:var(--mono);font-size:10.5px;font-weight:600;color:var(--muted);background:var(--off);border:1px solid var(--border);border-radius:var(--rs);padding:3px 10px;margin-bottom:12px}

/* ── TABLES ── */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:20px 0;border:1px solid var(--border);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;min-width:360px}
th{text-align:left;font-family:var(--mono);font-size:10.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding:10px 14px;border-bottom:1.5px solid var(--border);background:var(--off)}
td{padding:10px 14px;border-bottom:1px solid var(--border-s);font-size:14px;color:var(--mid)}
tr:last-child td{border-bottom:none}tr:hover td{background:var(--off)}
td.mono{font-family:var(--mono);font-size:13px;color:var(--text)}
td.ok{color:var(--green);font-weight:600}td.warn{color:var(--amber);font-weight:600}td.bad{color:var(--red);font-weight:600}
td strong{color:var(--text)}

/* ── FAQ ── */
.faq-list{list-style:none;display:grid;gap:0}
.faq-item{padding:20px 0;border-bottom:1px solid var(--border-s)}
.faq-item:last-child{border-bottom:none}
.faq-q{font-size:16px;font-weight:600;color:var(--text);margin-bottom:10px;line-height:1.4}
.faq-a{font-size:14.5px;color:var(--mid);line-height:1.78}.faq-a strong{color:var(--text)}

/* ── STEPS ── */
.steps{list-style:none;display:grid;gap:0}
.step{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--border-s)}
.step:last-child{border-bottom:none}
.step-num{flex-shrink:0;width:32px;height:32px;border-radius:50%;background:var(--copper);color:#fff;font-family:var(--mono);font-size:13px;font-weight:700;display:grid;place-items:center;margin-top:2px}
.step-body h3{font-size:16px;font-weight:600;margin-bottom:8px}
.step-body p{font-size:14.5px;color:var(--mid);line-height:1.75;max-width:none;margin:0}.step-body p+p{margin-top:8px}.step-body p strong{color:var(--text)}

/* ── WORKED EXAMPLE ── */
.worked{background:var(--off);border:1.5px solid var(--border);border-radius:var(--r);padding:22px;margin:20px 0}
.worked-title{font-family:var(--mono);font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--copper);margin-bottom:14px}
.worked-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:7px 0;border-bottom:1px solid var(--border-s);font-size:14px;flex-wrap:wrap}
.worked-row:last-of-type{border-bottom:none}
.worked-label{color:var(--mid);flex:1;min-width:160px}
.worked-val{font-family:var(--mono);font-size:13px;color:var(--text);font-weight:600;flex-shrink:0}
.worked-total{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:12px 0 0;margin-top:4px;border-top:2px solid var(--border);font-weight:700;flex-wrap:wrap}
.worked-total .worked-label{color:var(--text);font-size:15px}
.worked-total .worked-val{font-size:15px;color:var(--copper)}
.result-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0 0;font-size:14px;flex-wrap:wrap}
.badge{font-family:var(--mono);font-size:11px;font-weight:700;padding:3px 10px;border-radius:999px;white-space:nowrap}
.badge.pass{background:var(--green-l);color:var(--green)}
.badge.fail{background:var(--red-l);color:var(--red)}
.badge.warn-b{background:var(--amber-l);color:var(--amber)}

/* ── TOC / SIDEBAR ── */
.content-layout{display:grid;gap:48px;padding:48px 0}
@media(min-width:900px){.content-layout{grid-template-columns:1fr 280px;gap:64px;align-items:start}}
.content-sidebar{position:sticky;top:80px}
.toc{background:var(--off);border:1px solid var(--border);border-radius:var(--r);padding:20px}
.toc-title{font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.toc a{display:block;font-size:13.5px;color:var(--mid);text-decoration:none;padding:5px 0;border-bottom:1px solid var(--border-s);line-height:1.4}
.toc a:last-child{border-bottom:none}.toc a:hover{color:var(--copper)}
.toc a.sub{padding-left:14px;font-size:12.5px;color:var(--muted)}
.sidebar-cta{background:var(--copper-l);border:1px solid var(--copper-m);border-radius:var(--r);padding:18px;margin-top:16px}
.sidebar-cta-label{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--copper);margin-bottom:10px}
.sidebar-cta p{font-size:13px;color:var(--mid);line-height:1.6;margin-bottom:14px}
.sidebar-links{background:var(--off);border:1px solid var(--border);border-radius:var(--r);padding:18px;margin-top:12px}
.sidebar-links-label{font-family:var(--mono);font-size:10px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.sidebar-links a{display:block;font-size:13px;color:var(--mid);text-decoration:none;padding:5px 0;border-bottom:1px solid var(--border-s)}
.sidebar-links a:last-child{border-bottom:none}.sidebar-links a:hover{color:var(--copper)}

/* ── RELATED GRID ── */
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,210px),1fr));gap:12px;margin-top:24px}
.related-card{display:block;text-decoration:none;background:var(--white);border:1.5px solid var(--border);border-radius:var(--r);padding:18px;transition:border-color .15s}
.related-card:hover{border-color:var(--copper);text-decoration:none}
.related-card-label{font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.related-card h3{font-size:14.5px;font-weight:600;color:var(--text);margin-bottom:4px}
.related-card p{font-size:13px;color:var(--mid);line-height:1.55}

/* ── TOOL CTA STRIP ── */
.tool-cta{background:var(--copper-l);border:1.5px solid var(--copper-m);border-radius:var(--r);padding:28px 32px;margin:36px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
.tool-cta h3{font-size:18px;font-weight:700;color:var(--text);margin-bottom:6px}
.tool-cta p{font-size:14px;color:var(--mid);max-width:42ch;margin:0;line-height:1.6}

/* ── PAGE HERO ── */
.page-hero{padding:48px 0 40px;border-bottom:1px solid var(--border)}
.page-hero h1{font-size:clamp(26px,4vw,48px);font-weight:700;letter-spacing:-.03em;line-height:1.08;margin-bottom:16px}
.page-hero-sub{font-size:clamp(15px,1.8vw,18px);color:var(--mid);max-width:640px;line-height:1.7;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px 24px;font-family:var(--mono);font-size:11px;color:var(--muted);margin-bottom:28px}
.page-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ── DIAGRAM BOX ── */
.diagram-box{background:var(--white);border:1.5px solid var(--border);border-radius:var(--r);overflow:hidden;margin:28px 0;box-shadow:0 2px 12px rgba(0,0,0,.05)}
.diagram-bar{background:var(--off);border-bottom:1px solid var(--border);padding:10px 16px;display:flex;align-items:center;gap:8px}
.d-dot{width:10px;height:10px;border-radius:50%}
.d-dot.r{background:#FF5F57}.d-dot.y{background:#FFBD2E}.d-dot.g{background:#28C840}
.diagram-label{font-family:var(--mono);font-size:10.5px;color:var(--muted);margin-left:6px}
.diagram-body{padding:24px;overflow-x:auto}
.diagram-cta{background:var(--copper-l);border-top:1px solid var(--copper-m);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.diagram-cta span{font-size:13px;color:var(--mid)}

@media(max-width:640px){.page-hero{padding:32px 0 28px}.tool-cta{padding:20px}.content-layout{padding:32px 0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important}}