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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-muted: #6b7280;
  --color-accent: #4f46e5;
  --color-accent-hover: #4338ca;
  --color-border: #e5e7eb;
  --max-width: 720px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Nav */
nav {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-muted);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Main */
main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 0 3rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-muted);
  max-width: 480px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}

.btn:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
}

.btn-coming-soon {
  background: var(--color-border);
  color: var(--color-muted);
  cursor: default;
}

.btn-coming-soon:hover {
  background: var(--color-border);
  text-decoration: none;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.feature {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.feature p {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Prose (privacy policy, etc.) */
.prose h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.prose .last-updated {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  display: block;
}

.prose h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
}

.prose p {
  margin-bottom: 1rem;
  color: #374151;
}

.prose ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.prose li {
  margin-bottom: 0.4rem;
  color: #374151;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

footer a {
  color: var(--color-muted);
}

footer a:hover {
  color: var(--color-text);
}

@media (max-width: 600px) {
  nav {
    padding: 0.75rem 1rem;
  }

  main {
    padding: 1.25rem;
  }

  .hero {
    padding: 3rem 0 2rem;
  }
}