/* AiReview shared design system: tokens, base, header, footer, buttons, cookie notice.
   Every page loads this file. Product pages may override --accent (see aibizengine.css). */
:root{
  --color-background:#0b0b10;
  --color-surface:#15151d;
  --color-surface-2:#1d1d28;
  --color-text:#f5f5f7;
  --color-muted:#a3a3b2;
  --color-border:#2a2a38;
  --color-link:#8fb4ff;
  --accent:#2563eb;          /* AiReview brand accent (logo blue); products can set their own */
  --accent-ink:#ffffff;      /* readable text colour on top of --accent */
  --chrome-bg:#ffffff;       /* header, footer and cookie bar are light on every page */
  --chrome-alt:#f4f6fb;
  --chrome-text:#0f172a;
  --chrome-muted:#5b6475;
  --chrome-border:#e2e6ee;
  --brand-purple:#4B1FA8;
  --brand-purple-2:#7B3FE4;
  --container-width:1200px;
  --radius-card:16px;
  --radius-button:10px;
  --shadow-card:0 18px 40px -22px rgba(0,0,0,.8);
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--color-background);color:var(--color-text);font:400 17px/1.6 var(--font-body)}
img{max-width:100%;height:auto;display:block}
a{color:var(--color-link);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.container{max-width:var(--container-width);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px;top:0;background:#fff;color:#111;padding:.5rem 1rem;z-index:100}
.skip:focus{left:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--radius-button);border:1px solid transparent;font:600 16px/1.2 var(--font-body);cursor:pointer;text-decoration:none;transition:transform .15s,filter .15s,background .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-secondary{background:transparent;color:var(--color-text);border-color:var(--color-border)}
.btn-secondary:hover{background:var(--color-surface-2)}
.btn-sm{padding:9px 16px;font-size:15px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:#ffffff;border-bottom:1px solid var(--chrome-border)}
.inside-header{max-width:var(--container-width);margin:0 auto;padding:10px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;color:var(--chrome-text)}
.brand:hover{text-decoration:none}
.brand-logo{height:42px;width:auto}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;align-items:center}
.main-nav a{display:block;padding:8px 14px;color:var(--chrome-text);font-size:16px;border-radius:8px}
.main-nav a:hover{background:var(--chrome-alt);text-decoration:none}
.main-nav a[aria-current="page"]{color:var(--accent);font-weight:600}
.main-nav .btn{margin-left:8px;color:var(--accent-ink)}
.main-nav .btn:hover{background:var(--accent)}
.menu-toggle{display:none;background:none;border:1px solid var(--chrome-border);border-radius:8px;font:600 15px var(--font-body);color:var(--chrome-text);padding:8px 14px;cursor:pointer}

/* footer */
.site-footer{margin-top:80px;border-top:1px solid var(--chrome-border);background:var(--chrome-alt);color:var(--chrome-text);padding:48px 0 90px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
.footer-about p{color:var(--chrome-muted);font-size:15px;max-width:42ch}
.footer-about .brand-logo{height:38px;margin-bottom:6px}
.footer-col h2{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:var(--chrome-muted);margin:0 0 12px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col a{display:inline-block;padding:4px 0;color:var(--chrome-text);font-size:15px}
.site-footer a{color:var(--chrome-text)}
.site-footer .footer-legal a{color:#1d4ed8;text-decoration:underline}
.footer-legal{margin-top:36px;padding-top:22px;border-top:1px solid var(--chrome-border);font-size:14px;color:var(--chrome-muted)}
.footer-legal p{margin:0 0 .7em;max-width:none}

/* cookie notice */
.cookie{position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--chrome-bg);color:var(--chrome-text);border-top:1px solid var(--chrome-border);box-shadow:0 -8px 24px -14px rgba(15,23,42,.35);padding:.8rem 1.25rem;font-size:15px;line-height:1.45;display:flex;gap:1rem 1.5rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cookie p{margin:0;max-width:62ch}
.cookie a{color:#1d4ed8}
.cookie .row{display:flex;gap:.6rem}
.cookie button{font:600 15px var(--font-body);padding:.5rem 1rem;border-radius:8px;border:1px solid var(--chrome-border);background:transparent;color:var(--chrome-text);cursor:pointer}
.cookie button.ok{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}

@media (max-width:820px){
  .inside-header{padding:12px 16px}
  .container{padding:0 16px}
  .menu-toggle{display:block}
  .main-nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--chrome-bg);border-bottom:1px solid var(--chrome-border)}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 16px}
  .main-nav a{padding:14px 8px;border-radius:0;border-bottom:1px solid var(--chrome-border)}
  .main-nav .btn{margin:12px 0 0;border-bottom:0}
  .footer-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}
[id]{scroll-margin-top:84px}

/* light page theme (homepage, products, about): add class="theme-light" to <body> */
body.theme-light{
  --color-background:#ffffff;--color-surface:#f6f8fc;--color-surface-2:#eef2f9;
  --color-text:#0f172a;--color-muted:#5b6475;--color-border:#e2e6ee;--color-link:#1d4ed8;
  --shadow-card:0 14px 34px -22px rgba(15,23,42,.35);
}
@media (max-width:820px){.brand-logo{height:36px}}