/* Cortex Brain Training — marketing site. Cerebral Instrument: ink base + signal lime. */
:root {
  --ink: #0A0C10;
  --surface: #101319;
  --card: #161A22;
  --border: #2A2F3B;
  --text: #F4F6F8;
  --muted: #929AA8;
  --signal: #C8FA5A;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--ink);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* nav */
nav {
  display: flex; align-items: center; gap: 8px;
  padding: 22px 24px; max-width: 960px; margin: 0 auto;
}
nav .brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; margin-right: auto; }
nav .brand b { color: var(--signal); }
nav .links a { color: var(--muted); margin-left: 22px; font-size: 0.95rem; }
nav .links a:hover { color: var(--text); text-decoration: none; }
/* language toggle (always visible, even on phones) */
.lang { color: var(--muted); font-size: 0.9rem; font-weight: 700; margin-left: 22px;
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; letter-spacing: 0.02em; }
.lang:hover { color: var(--text); border-color: var(--signal); text-decoration: none; }
/* On phones, drop the top nav links (the footer already has Privacy/Terms/Support). */
@media (max-width: 640px) { nav .links { display: none; } }

/* hero */
.hero {
  display: flex; align-items: center; justify-content: center; gap: 48px;
  max-width: 1000px; margin: 0 auto; padding: 56px 24px 56px; text-align: left;
}
.hero-copy { flex: 1 1 0; max-width: 600px; }
.hero-shot { flex: 0 0 auto; }
.hero-shot img {
  width: 232px; height: auto; border-radius: 28px;
  border: 1px solid var(--border); box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
@media (max-width: 760px) {
  .hero { flex-direction: column-reverse; text-align: center; gap: 32px; padding-top: 32px; }
  .hero .pills, .hero .badges { justify-content: center; }
  .hero p.tag { margin-left: auto; margin-right: auto; }
}
.hero h1 { font-size: clamp(2.4rem, 6vw, 3.6rem); letter-spacing: -0.03em; line-height: 1.05; }
.hero h1 .lime { color: var(--signal); }
.hero p.tag { font-size: clamp(1.05rem, 2.5vw, 1.3rem); color: var(--muted); margin: 18px 0 0; max-width: 560px; }
.pills { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 8px; }
.pill { border: 1px solid var(--border); color: var(--text); border-radius: 999px; padding: 7px 16px; font-size: 0.9rem; }
.pill b { color: var(--signal); }
.badges { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 20px; color: var(--text); font-weight: 600;
}
.badge:hover { border-color: var(--signal); text-decoration: none; }
.badge small { display: block; color: var(--muted); font-weight: 400; font-size: 0.72rem; }

/* features */
section.features { padding: 40px 0 24px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.feature { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 22px; }
.feature .rail { width: 32px; height: 3px; border-radius: 999px; background: var(--signal); margin-bottom: 14px; }
.feature h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature p { color: var(--muted); font-size: 0.95rem; }

/* section heading */
.section-title { text-align: center; font-size: clamp(1.5rem, 4vw, 2rem); letter-spacing: -0.02em; margin: 56px 0 28px; }

/* screenshots gallery */
section.screens .shots { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
section.screens .shots img {
  width: 200px; height: auto; border-radius: 22px;
  border: 1px solid var(--border); box-shadow: 0 14px 40px rgba(0,0,0,0.45);
}

/* faq */
section.faq { padding-bottom: 24px; }
section.faq .qa { max-width: 720px; margin: 0 auto; }
section.faq .qa h3 { font-size: 1.05rem; margin: 22px 0 6px; }
section.faq .qa p { color: var(--muted); }

/* generic legal/doc page */
.doc { padding: 40px 0 60px; }
.doc h1 { font-size: 1.9rem; letter-spacing: -0.02em; }
.doc .meta { color: var(--muted); font-size: 0.9rem; margin: 6px 0 28px; }
.doc h2 { font-size: 1.15rem; margin-top: 1.8em; }
.doc p, .doc li { color: #D4D8DF; }
.doc ul { margin: 0.5em 0 0.5em 1.2em; }
.doc .lead { font-size: 1.1rem; color: var(--text); }

footer {
  border-top: 1px solid var(--border); margin-top: 48px;
  padding: 28px 24px; color: var(--muted); font-size: 0.9rem;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }