/* ============================================================
   Saye design system  ·  navy + gold
   Shared across Saye Consulting / SayeOS.com / SayeOS.org
   Light + dark via [data-theme]; defaults to light.
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  /* brand */
  --gold:#c2a24a;
  --gold-strong:#a9852f;
  --gold-soft:rgba(194,162,74,.14);
  --navy:#0f1f3d;
  --navy-2:#16294d;

  /* light surfaces (default) */
  --canvas:#ffffff;
  --canvas-2:#f5f7fb;
  --card:#ffffff;
  --hairline:#e6e9f0;
  --hairline-strong:#d4dae6;

  /* light text */
  --ink:#0f1f3d;
  --body:#45506a;
  --mute:#78859c;

  --on-gold:#0f1f3d;
  --link:var(--navy);
  --link-hover:var(--gold-strong);

  --shadow-sm:0 1px 2px rgba(15,31,61,.06);
  --shadow-md:0 12px 30px rgba(15,31,61,.10);

  /* geometry (from reference: compact) */
  --r-sm:4px; --r-md:8px; --r-lg:12px; --r-pill:9999px;
  --container:1180px;
  --nav-h:66px;

  /* type */
  --font:"Geist","Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

[data-theme="dark"]{
  --canvas:#0a1526;
  --canvas-2:#0f1f3d;
  --card:#0f1f3d;
  --hairline:#1e2d4a;
  --hairline-strong:#2a3f60;

  --ink:#f5f6f7;
  --body:#b4bdce;
  --mute:#7382a0;

  --link:#e9edf5;
  --link-hover:var(--gold);

  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 18px 40px rgba(0,0,0,.45);
}

/* ---------- Reset ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--canvas);
  color:var(--body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .3s ease,color .3s ease;
}
img{max-width:100%;display:block}
a{color:var(--link);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--link-hover)}

/* ---------- Layout ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-alt{background:var(--canvas-2)}
.center{text-align:center}
.narrow{max-width:720px;margin-left:auto;margin-right:auto}

/* ---------- Type ---------- */
h1,h2,h3,h4{color:var(--ink);font-weight:600;line-height:1.12;letter-spacing:-.02em}
h1{font-size:clamp(2.2rem,5vw,3.25rem);letter-spacing:-.03em}
h2{font-size:clamp(1.7rem,3.4vw,2.35rem)}
h3{font-size:1.3rem;letter-spacing:-.01em}
h4{font-size:1.05rem}
p{margin:0 0 1rem}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--body);line-height:1.65}
.muted{color:var(--mute)}
.eyebrow{
  display:inline-block;font-size:.75rem;font-weight:600;letter-spacing:.10em;
  text-transform:uppercase;color:var(--gold-strong);margin-bottom:14px;
}
[data-theme="dark"] .eyebrow{color:var(--gold)}
.section-head{max-width:680px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-size:.95rem;font-weight:600;line-height:1;
  padding:13px 20px;border-radius:var(--r-sm);
  border:1px solid transparent;cursor:pointer;transition:all .18s ease;white-space:nowrap;
}
.btn-primary{background:var(--gold);color:var(--on-gold);border-color:var(--gold)}
.btn-primary:hover{background:var(--gold-strong);border-color:var(--gold-strong);color:#fff;transform:translateY(-1px)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--hairline-strong)}
.btn-secondary:hover{border-color:var(--gold);color:var(--gold-strong)}
[data-theme="dark"] .btn-secondary:hover{color:var(--gold)}
.btn-ghost{background:transparent;color:var(--body);padding:12px 10px}
.btn-ghost:hover{color:var(--ink)}
.btn-lg{padding:15px 26px;font-size:1rem}

/* ---------- Navbar ---------- */
.nav{
  position:sticky;top:0;z-index:50;height:var(--nav-h);
  background:color-mix(in srgb,var(--canvas) 88%,transparent);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--hairline);
}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto}
.brand img{height:34px;width:auto}
.brand .logo-dark{display:none}
[data-theme="dark"] .brand .logo-light{display:none}
[data-theme="dark"] .brand .logo-dark{display:block}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  color:var(--body);font-size:.9rem;font-weight:600;padding:9px 12px;border-radius:var(--r-sm);
}
.nav-links a:hover,.nav-links a.active{color:var(--ink);background:var(--gold-soft)}
.nav-actions{display:flex;align-items:center;gap:8px}

.theme-toggle{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--hairline-strong);border-radius:var(--r-sm);background:transparent;
  color:var(--body);cursor:pointer;transition:all .18s ease;
}
.theme-toggle:hover{color:var(--gold-strong);border-color:var(--gold)}
[data-theme="dark"] .theme-toggle:hover{color:var(--gold)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:block}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}

.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--hairline-strong);
  border-radius:var(--r-sm);background:transparent;color:var(--ink);cursor:pointer}

/* ---------- Hero ---------- */
.hero{padding:84px 0 72px;position:relative;overflow:hidden}
.hero .container{position:relative;z-index:1}
.hero h1{max-width:16ch}
.hero .lead{max-width:52ch;margin-top:18px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-glow{
  position:absolute;inset:0;pointer-events:none;z-index:0;
  background:radial-gradient(60% 55% at 78% 8%,var(--gold-soft),transparent 70%);
}
[data-theme="dark"] .hero-glow{
  background:radial-gradient(55% 50% at 80% 0%,rgba(194,162,74,.16),transparent 70%),
             radial-gradient(50% 60% at 12% 100%,rgba(22,41,77,.6),transparent 70%);
}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--card);border:1px solid var(--hairline);border-radius:var(--r-md);
  padding:26px;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.card:hover{border-color:var(--gold);transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card .ico{
  width:44px;height:44px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;
  background:var(--gold-soft);color:var(--gold-strong);margin-bottom:16px;
}
[data-theme="dark"] .card .ico{color:var(--gold)}
.card .ico svg{width:22px;height:22px}
.card h3{margin-bottom:8px}
.card p{color:var(--body);margin:0}

/* stat band */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.stat{border:1px solid var(--hairline);border-radius:var(--r-md);padding:26px;background:var(--card)}
.stat .num{font-size:2.4rem;font-weight:600;color:var(--ink);letter-spacing:-.02em;line-height:1}
.stat .lbl{color:var(--mute);margin-top:8px;font-size:.95rem}

/* methodology steps */
.steps{display:grid;gap:18px;counter-reset:step}
.step{display:flex;gap:20px;align-items:flex-start;background:var(--card);
  border:1px solid var(--hairline);border-radius:var(--r-md);padding:24px 26px}
.step .n{flex:0 0 auto;width:40px;height:40px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;font-weight:600;
  background:var(--navy);color:#fff}
[data-theme="dark"] .step .n{background:var(--gold);color:var(--on-gold)}
.step h3{margin-bottom:6px}
.step p{margin:0;color:var(--body)}

/* checklist */
.check{list-style:none;display:grid;gap:12px}
.check li{display:flex;gap:12px;align-items:flex-start;color:var(--body)}
.check li::before{content:"";flex:0 0 auto;width:20px;height:20px;margin-top:2px;border-radius:50%;
  background:var(--gold-soft) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a9852f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/12px no-repeat}

/* CTA band */
.cta-band{background:var(--navy);border-radius:var(--r-lg);padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.cta-band h2,.cta-band p{color:#fff}
.cta-band .lead{color:#c9d3e6}
.cta-band .hero-cta{justify-content:center;margin-top:24px}
.cta-band::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 80% at 85% 10%,rgba(194,162,74,.22),transparent 70%)}

/* eyebrow badge (pill) */
.badge{display:inline-flex;align-items:center;gap:8px;font-size:.72rem;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--gold-strong);
  background:var(--gold-soft);border:1px solid rgba(194,162,74,.35);
  padding:6px 12px;border-radius:var(--r-pill)}
[data-theme="dark"] .badge{color:var(--gold)}

/* ---------- Forms ---------- */
.form{display:grid;gap:16px;max-width:560px}
.field{display:grid;gap:6px}
.field label{font-size:.82rem;font-weight:600;color:var(--ink)}
.input,.textarea{
  width:100%;background:var(--canvas);color:var(--ink);
  border:1px solid var(--hairline-strong);border-radius:var(--r-sm);
  padding:13px 14px;font:inherit;font-size:.95rem;transition:border-color .15s ease}
.input:focus,.textarea:focus{outline:none;border-color:var(--gold)}
.textarea{min-height:130px;resize:vertical}

/* ---------- Footer ---------- */
.footer{background:var(--canvas-2);border-top:1px solid var(--hairline);padding:56px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer .brand img{height:30px}
.footer h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--mute);margin-bottom:14px}
.footer a{display:block;color:var(--body);font-size:.92rem;padding:5px 0}
.footer a:hover{color:var(--gold-strong)}
[data-theme="dark"] .footer a:hover{color:var(--gold)}
.footer .fnote{color:var(--body);font-size:.92rem;max-width:34ch;margin-top:14px}
.footer-bottom{margin-top:40px;padding-top:22px;border-top:1px solid var(--hairline);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  color:var(--mute);font-size:.85rem}

/* ---------- Utilities ---------- */
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.kv{display:grid;gap:6px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill{border:1px solid var(--hairline-strong);border-radius:var(--r-pill);padding:8px 14px;
  font-size:.85rem;font-weight:600;color:var(--body)}
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .section{padding:64px 0}
  .nav-links{
    position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;align-items:stretch;
    background:var(--canvas);border-bottom:1px solid var(--hairline);padding:10px 16px 18px;gap:2px;
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:40px 22px}
  .hero{padding:56px 0 48px}
}