:root{
  color-scheme: light;
  --page:      #ffffff;
  --surface:   #f5f5f7;
  --surface-2: #fbfbfd;
  --ink:       #1d1d1f;
  --ink-2:     #6e6e73;
  --ink-3:     #86868b;
  --border:    rgba(0,0,0,0.08);
  --accent:    #0071e3;
  --accent-ink:#ffffff;
  --dark-bg:   #000000;
  --dark-ink:  #f5f5f7;
  --dark-ink-2:#a1a1a6;

  --font-ui: -apple-system, "SF Pro Display", "SF Pro Text", system-ui, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme: dark;
    --page:#000000; --surface:#1d1d1f; --surface-2:#000000;
    --ink:#f5f5f7; --ink-2:#a1a1a6; --ink-3:#86868b;
    --border: rgba(255,255,255,0.12);
    --accent:#2997ff;
  }
}
:root[data-theme="dark"]{
  color-scheme: dark;
  --page:#000000; --surface:#1d1d1f; --surface-2:#000000;
  --ink:#f5f5f7; --ink-2:#a1a1a6; --ink-3:#86868b;
  --border: rgba(255,255,255,0.12);
  --accent:#2997ff;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--page);
  color:var(--ink);
  font-family:var(--font-ui);
  -webkit-font-smoothing:antialiased;
  line-height:1.47059;
}
a{color:inherit;text-decoration:none;}

.nav{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 22px; height:44px;
  background:color-mix(in srgb, var(--page) 82%, transparent);
  backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--border);
  font-size:12px;
}
.nav .brand{font-weight:600;font-size:13px;letter-spacing:-0.005em;}
.nav .links{display:flex;gap:22px;color:var(--ink-2);}
.nav .links a:hover{color:var(--ink);}
.nav .back{color:var(--ink-2);}
.nav .back:hover{color:var(--ink);}

.hero{
  background:var(--dark-bg);
  color:var(--dark-ink);
  text-align:center;
  padding:96px 22px 76px;
}
.hero .eyebrow{
  font-size:19px; font-weight:600; color:var(--dark-ink-2); margin:0 0 6px;
}
.hero h1{
  font-size:clamp(40px, 7vw, 80px);
  font-weight:700;
  letter-spacing:-0.015em;
  line-height:1.05;
  margin:0 0 14px;
  text-wrap:balance;
}
.hero p{
  font-size:clamp(17px, 2.4vw, 24px);
  color:var(--dark-ink-2);
  max-width:640px;
  margin:0 auto 32px;
  text-wrap:balance;
}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 22px;
  border-radius:980px;
  font-size:15px; font-weight:500;
  border:1px solid transparent;
  transition:opacity .15s ease, background .15s ease;
  cursor:pointer;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{opacity:.86;}
.btn-secondary{color:var(--accent);}
.btn-secondary:hover{opacity:.7;}
.hero .btn-secondary{color:#2997ff;}

.section{max-width:980px;margin:0 auto;padding:88px 22px;}
.section-tight{padding-top:56px;padding-bottom:56px;}
.section h2{
  font-size:clamp(28px,4vw,44px);
  font-weight:700;
  letter-spacing:-0.01em;
  margin:0 0 14px;
  text-align:center;
  text-wrap:balance;
}
.section .lede{
  font-size:19px;color:var(--ink-2);text-align:center;
  max-width:620px;margin:0 auto 48px;line-height:1.5;
}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
.card{
  background:var(--surface);border-radius:20px;padding:28px 26px;
  border:1px solid var(--border);
}
.card .tag{font-size:12px;font-weight:600;color:var(--ink-3);text-transform:uppercase;letter-spacing:.04em;}
.card h3{font-size:20px;font-weight:600;margin:8px 0 8px;letter-spacing:-0.005em;}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.5;margin:0 0 16px;}
.card .btn{width:100%;font-size:14px;padding:10px 18px;}

.status-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:99px;
  background:var(--surface-2);border:1px solid var(--border);color:var(--ink-2);
}
.status-pill.locked::before{content:"🔒";font-size:11px;}

footer{
  border-top:1px solid var(--border);
  padding:32px 22px 48px;
  font-size:12px;color:var(--ink-3);
  text-align:center;
}
footer a{color:var(--accent);}

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