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

:root {
  --bg: #0c0c0c;
  --bg-elevated: #141414;
  --text: #fafafa;
  --text-muted: #a1a1a1;
  --accent: #eab308;
  --accent-dim: #ca8a04;
  --border: #262626;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent-dim);
}

.btn-cta {
  background: var(--accent);
  color: var(--bg);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-cta:hover {
  background: var(--accent-dim);
}

/* Hero */
.hero {
  padding: 5rem 1.5rem 4rem;
  max-width: 42rem;
  margin: 0 auto;
  text-align: center;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 2.5vw, 1.375rem);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 1.25rem;
}

.hero-accent {
  color: var(--accent);
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin: 0 0 2rem;
  line-height: 1.6;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  max-width: 56rem;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--border);
}

.feature {
  padding: 1.5rem 0;
}

.feature-icon {
  display: block;
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

.feature h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.feature p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.55;
}

/* CTA block */
.cta-block {
  text-align: center;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--border);
}

.cta-block h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}

/* Footer */
.footer {
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer .logo {
  display: block;
  margin-bottom: 0.5rem;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

@media (min-width: 640px) {
  .header {
    padding: 1.5rem 2rem;
  }

  .hero {
    padding: 6rem 2rem 5rem;
  }

  .features {
    padding: 5rem 2rem;
  }

  .cta-block {
    padding: 5rem 2rem;
  }

  .footer {
    padding: 2.5rem 2rem;
  }
}