/* ============================================================
   Synaptic Silhouette — site styles.  Edit words in the .html files.
   Edit colors/look here.
   ============================================================ */
:root {
  --bg: #f7f7f4; --bg-deep: #f4f4f1; --surface: #ffffff;
  --text: #40454e; --muted: #71767f; --heading: #0b0c0e;
  --line: #e4e3de; --primary: #6c4cf0; --primary-hover: #5a3fd0;
  --on-accent: #ffffff;
  --font-heading: 'Space Grotesk', system-ui, sans-serif; --font-body: 'Hanken Grotesk', system-ui, sans-serif; --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --maxw: 1100px; --header-h: 72px;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; scroll-snap-type:y mandatory; }
@media (prefers-reduced-motion: reduce) { html { scroll-snap-type:none; scroll-behavior:auto; } }
body { font-family:var(--font-body); color:var(--text); background:var(--bg); line-height:1.6; -webkit-font-smoothing:antialiased; }
h1,h2,h3 { font-family:var(--font-heading); color:var(--heading); line-height:1.1; letter-spacing:-0.02em; }
a { color:inherit; text-decoration:none; }
img,svg { display:block; }
.container { width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.site-header { position:sticky; top:0; z-index:50; height:var(--header-h); display:flex; align-items:center;
  background:color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.site-header .container { display:flex; align-items:center; gap:32px; }
.brand { display:flex; align-items:center; gap:10px; font-weight:700; font-size:18px; color:var(--heading); }
.brand svg { height:28px; width:auto; }
.nav { display:flex; gap:26px; margin-left:8px; }
.nav a { color:var(--muted); font-size:15px; font-weight:500; transition:color .15s; }
.nav a:hover { color:var(--heading); }
.header-actions { margin-left:auto; display:flex; gap:10px; align-items:center; }
.btn { display:inline-flex; align-items:center; justify-content:center; padding:11px 22px; border-radius:999px;
  font-weight:600; font-size:15px; cursor:pointer; border:1px solid transparent; transition:transform .15s, background .15s, border-color .15s; }
.btn:hover { transform:translateY(-1px); }
.btn-primary { background:var(--primary); color:var(--on-accent); border-color:var(--primary); }
.btn-primary:hover { background:var(--primary-hover); border-color:var(--primary-hover); }
.btn-ghost { background:transparent; color:var(--heading); border-color:var(--line); }
.btn-ghost:hover { border-color:var(--muted); }
.btn-sm { padding:8px 18px; font-size:14px; }
.menu-toggle { display:none; margin-left:auto; background:none; border:0; cursor:pointer; padding:8px; }
.menu-toggle span { display:block; width:22px; height:2px; background:var(--heading); margin:4px 0; }
.section { min-height:100svh; display:flex; flex-direction:column; justify-content:center; scroll-snap-align:start; padding:96px 0; }
.eyebrow { font-family:var(--font-mono); font-size:13px; font-weight:600; letter-spacing:0.12em; text-transform:uppercase; color:var(--primary); }
.hero { text-align:center; }
.hero .eyebrow { display:block; margin-bottom:18px; }
.hero h1 { font-size:clamp(2.6rem, 6vw, 4rem); font-weight:700; }
.hero p.sub { max-width:640px; margin:20px auto 0; font-size:1.2rem; color:var(--muted); }
.hero .actions { display:flex; gap:12px; justify-content:center; margin-top:32px; flex-wrap:wrap; }
.features { text-align:center; }
.features .eyebrow { display:block; margin-bottom:14px; }
.features h2 { font-size:clamp(1.9rem, 4vw, 2.6rem); font-weight:600; max-width:720px; margin:0 auto; }
.feature-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:40px; margin-top:56px; text-align:left; }
.feature { display:flex; gap:16px; }
.feature .icon { flex:none; width:46px; height:46px; border-radius:50%; background:var(--primary); color:var(--on-accent); display:flex; align-items:center; justify-content:center; }
.feature .icon svg { width:22px; height:22px; }
.feature h3 { font-size:1.25rem; font-weight:700; margin-bottom:8px; }
.feature p { color:var(--muted); font-size:1rem; }
.cta .card { max-width:680px; margin:0 auto; text-align:center; background:var(--surface); border:1px solid var(--line);
  border-radius:16px; padding:48px 40px; box-shadow:0 24px 60px rgba(0,0,0,.06); }
.cta h2 { font-size:clamp(1.9rem, 4vw, 2.4rem); font-weight:600; }
.cta p.sub { margin:16px auto 0; max-width:520px; color:var(--muted); font-size:1.15rem; }
.cta .actions { display:flex; gap:12px; justify-content:center; margin-top:28px; flex-wrap:wrap; }
.page { padding:calc(var(--header-h) + 72px) 0 96px; min-height:100svh; }
.page h1 { font-size:clamp(2.4rem, 5vw, 3.4rem); font-weight:700; }
.page .lede { margin-top:16px; font-size:1.2rem; color:var(--muted); max-width:640px; }
.page .prose { margin-top:28px; max-width:640px; }
.page .prose p { margin-bottom:16px; }
.page .cards { display:grid; grid-template-columns:repeat(3,1fr); gap:32px; margin-top:40px; }
.page .cards h3 { font-size:1.2rem; margin-bottom:8px; }
.page .cards p { color:var(--muted); }
.page .back { margin-top:40px; }
.site-footer { border-top:1px solid var(--line); background:var(--bg); scroll-snap-align:start; }
.site-footer .container { padding-top:48px; padding-bottom:48px; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:32px; }
.footer-brand .name { font-weight:700; font-size:20px; color:var(--heading); }
.footer-brand .links { margin-top:8px; font-size:14px; color:var(--muted); }
.footer-brand .links a:hover { text-decoration:underline; }
.footer-col h4 { font-size:14px; font-weight:600; color:var(--heading); margin-bottom:12px; }
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:8px; }
.footer-col a { color:var(--muted); font-size:14px; }
.footer-col a:hover { color:var(--heading); text-decoration:underline; }
.footer-legal { margin-top:40px; font-size:14px; color:var(--muted); }
@media (max-width:800px) {
  .nav, .header-actions { display:none; }
  .menu-toggle { display:block; }
  .site-header.open { height:auto; flex-direction:column; align-items:stretch; padding:12px 0; }
  .site-header.open .container { flex-direction:column; align-items:flex-start; gap:14px; }
  .site-header.open .nav { display:flex; flex-direction:column; gap:10px; margin:0; }
  .site-header.open .header-actions { display:flex; }
  .feature-grid, .page .cards { grid-template-columns:1fr; gap:28px; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
}