/* Minimal, responsive styles for Opti3D landing page */
:root {
  --bg: #0b0f14;
  --card: #111723;
  --ink: #e7eef7;
  --muted: #9fb0c6;
  --accent: #2b8bd8;
  --radius: 16px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink);
  background: radial-gradient(1200px 500px at 50% -100px, #162231 0%, var(--bg) 60%);
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  display: block;
  height: auto;
  filter: drop-shadow(0 2px 12px rgba(0,0,0,.3));
}

.hero {
  margin-top: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

h1 {
  margin: 0 0 6px;
  font-size: clamp(28px, 5vw, 42px);
  letter-spacing: .2px;
}

.lead {
  margin: 0;
  font-size: clamp(16px, 2.8vw, 18px);
  color: var(--muted);
}

.cta {
  margin-top: 18px;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  color: white;
  background: var(--accent);
  font-weight: 600;
  border: 1px solid rgba(255,255,255,.1);
}

.btn:hover { opacity: .95; }

.footer {
  margin-top: 28px;
  color: var(--muted);
}