/* AI_CONTEXT_FILE: Shared CNCHelper.ca brand layer for every tool page (not index.html, which keeps its own inline copy)
   STABILITY: Stable
   KEY_PATTERNS: tokens on :root, .site-top header, .tool-hero intro, .site-foot footer, .btn / .card / .field primitives.
   Tool pages link this, then add their own page-specific <style>. Dark only, per brand-guide.md.
   RELATED_FILES: brand-guide.md, index.html, slab-flattener/index.html, banner-plotter/index.html, plotwalk/index.html */

:root{
  --bg:#0d0e10; --panel:#15171a; --panel2:#1a1d21; --line:#262a30; --line2:#343942;
  --text:#ece9e2; --mute:#8c9098; --dim:#5d626b;
  --amber:#ffb020; --amber2:#ffd27a; --amber-ink:#14110a;
  --cyan:#4fd1c5; --green:#5bd68b; --red:#ff5d4a;
  --field:#0f1113;
  --display:"Barlow Condensed","Arial Narrow",Impact,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font:400 15px/1.55 var(--body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(800px 420px at 92% -10%,rgba(255,176,32,.10),transparent 60%),
             linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px) 0 0/56px 56px,
             linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px) 0 0/56px 56px;
  -webkit-mask-image:linear-gradient(#000 0,#000 30%,transparent 75%);mask-image:linear-gradient(#000 0,#000 30%,transparent 75%)}
[hidden]{display:none!important}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:6px}
.wrap{width:min(1280px,100% - 32px);margin-inline:auto}

/* header */
.site-top{position:sticky;top:0;z-index:30;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:rgba(13,14,16,.78);border-bottom:1px solid var(--line)}
.site-top .bar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand svg{width:32px;height:32px;flex:none;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.brand:hover svg{transform:rotate(-90deg)}
.wordmark{font:800 1.5rem/1 var(--display);letter-spacing:.02em;text-transform:uppercase}
.wordmark b{font-weight:500;color:#c9c5bb}
.wordmark small{font:500 .68rem var(--mono);color:var(--amber);text-transform:lowercase;margin-left:2px;letter-spacing:0}
.site-nav{display:flex;align-items:center;gap:22px}
.site-nav a{font:500 .9rem var(--body);color:var(--mute);text-decoration:none;transition:color .2s;white-space:nowrap}
.site-nav a:hover{color:var(--text)}
.site-nav a[aria-current="page"]{color:var(--amber)}
.site-nav .all{font:700 .9rem/1 var(--display);letter-spacing:.08em;text-transform:uppercase;color:var(--text);border:1px solid var(--line2);border-radius:8px;padding:.55rem .85rem}
.site-nav .all:hover{border-color:var(--amber);color:var(--amber)}
@media(max-width:1100px){.site-nav a:not(.all){display:none}}
@media(max-width:760px){.wordmark{font-size:1.3rem}.brand svg{width:28px;height:28px}}

/* tool intro */
.tool-hero{padding:30px 0 22px}
.kicker{font:500 .74rem var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--amber)}
.tool-hero h1{font:800 clamp(2.4rem,6vw,4.2rem)/.92 var(--display);text-transform:uppercase;margin:.4rem 0 .6rem;letter-spacing:-.005em}
.tool-hero h1 .hl{color:var(--amber)}
.tool-hero p{margin:0;max-width:62ch;color:#b9bcc2;font-size:1.05rem}

/* primitives */
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px}
.card-h{font:700 1.2rem/1 var(--display);text-transform:uppercase;letter-spacing:.05em;margin:0 0 12px;display:flex;align-items:center;gap:.55rem}
.card-h::before{content:"//";color:var(--amber);font:500 .85rem var(--mono)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:40px;padding:.6rem 1.05rem;font:700 .98rem/1 var(--display);letter-spacing:.08em;text-transform:uppercase;color:var(--text);background:transparent;border:1px solid var(--line2);border-radius:8px;cursor:pointer;text-decoration:none;transition:border-color .2s,color .2s,background .2s,transform .15s}
.btn:hover:not(:disabled){border-color:var(--amber);color:var(--amber)}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.primary{background:var(--amber);border-color:var(--amber);color:var(--amber-ink);border-radius:0;clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px))}
.btn.primary:hover:not(:disabled){background:var(--amber2);border-color:var(--amber2);color:var(--amber-ink)}
.btn.sm{min-height:32px;padding:.4rem .75rem;font-size:.85rem}
input[type=number],input[type=text],select,textarea{width:100%;background:var(--field);color:var(--text);border:1px solid var(--line2);border-radius:8px;padding:8px 10px;font:400 15px/1.35 var(--body)}
input[type=number]{font-family:var(--mono);font-size:14px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(255,176,32,.15)}
input[type=range],input[type=checkbox],input[type=radio]{accent-color:var(--amber)}
.mono{font-family:var(--mono)}

/* footer */
.site-foot{margin-top:70px;border-top:1px solid var(--line);padding:2rem 0 2.6rem;color:var(--mute);font-size:.86rem}
.site-foot .in{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-start}
.site-foot .brand svg{width:24px;height:24px}
.site-foot .wordmark{font-size:1.15rem}
.site-foot .warn{max-width:32rem;margin:0;font:400 .75rem/1.55 var(--mono);color:#666b74}
.site-foot .warn b{color:var(--amber);font-weight:500}
.site-foot nav{display:flex;flex-wrap:wrap;gap:18px}
.site-foot nav a{text-decoration:none}.site-foot nav a:hover{color:var(--text)}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}