/* Minimal, accessible, responsive styles for ThinkersClass landing */
:root{
  --bg:#0a0a0a;
  --panel:#111214;
  --text:#e9eef5;
  --muted:#a7b1be;
  --brand:#5dd6ff;
  --brand-2:#8b5cf6;
  --border:#1e2126;
  --radius:16px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 800px at 70% -10%, rgba(93,214,255,.15), transparent 60%), var(--bg);
  color:var(--text);
  line-height:1.55;
}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1080px; margin:auto; padding:20px}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:8px 0;
}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.2px; color:var(--text)}
.nav-cta{display:flex; gap:10px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 16px; border-radius:999px; background:linear-gradient(90deg,var(--brand),var(--brand-2));
  color:#081018; font-weight:700; border:1px solid transparent; box-shadow:var(--shadow)
}
.btn.ghost{
  background:transparent; color:var(--text); border:1px solid var(--border); box-shadow:none
}
.btn.lg{padding:14px 22px; font-size:1.05rem}
.hero{display:grid; grid-template-columns:1.1fr .9fr; gap:28px; align-items:center; padding-top:24px}
.hero h1{font-size: clamp(2rem, 3.8vw, 3.2rem); margin:0 0 10px}
.accent{background: linear-gradient(90deg, var(--brand), var(--brand-2)); -webkit-background-clip:text; background-clip:text; color:transparent}
.lead{font-size:1.1rem; color:var(--muted); margin:0 0 18px}
.cta-row{display:flex; gap:12px; flex-wrap:wrap; margin:10px 0 6px}
.tiny{font-size:.85rem}
.muted{color:var(--muted)}
.hero-art{
  background:linear-gradient(180deg, rgba(93,214,255,.08), rgba(139,92,246,.08));
  border:1px solid var(--border); border-radius:var(--radius); padding:8px; box-shadow:var(--shadow)
}
.hero-art img{width:100%; height:auto; display:block; border-radius:calc(var(--radius) - 6px)}
.features h2, .how h2, .cta h2{font-size: clamp(1.4rem, 2.4vw, 2rem)}
.grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:12px}
.card{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); padding:18px; box-shadow:var(--shadow)}
.steps{display:grid; gap:8px; padding-left:18px}
.waitlist{display:flex; gap:10px; flex-wrap:wrap; margin-top:10px}
.waitlist input{
  flex:1; min-width:240px; padding:12px 14px; border-radius:999px; border:1px solid var(--border);
  background:#0f1114; color:var(--text); outline:none
}
.footer{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; border-top:1px solid var(--border); margin-top:28px; padding-top:18px}
.footer-nav{display:flex; gap:14px}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0}
@media (max-width:940px){ .hero{grid-template-columns:1fr} .grid{grid-template-columns:1fr} }