*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0D0F14;
  --surface: #1B2234;
  --surface-variant: #242C41;
  --outline: rgba(255, 255, 255, 0.07);
  --accent: #2DD4CB;
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.55);
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Nav */
header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--outline);
}

nav {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta-nav {
  font-size: 0.875rem;
  font-weight: 600;
  color: #000000;
  background: var(--accent);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.cta-nav:hover { opacity: 0.85; }

/* Hero */
main { flex: 1; }

.hero {
  max-width: 960px;
  margin: 0 auto;
  padding: 7rem 2rem 6rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}

.tagline {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 2.5rem;
}

.cta-button {
  display: inline-block;
  background: var(--accent);
  color: #000000;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
}

.cta-button:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--outline);
}