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

:root {
  --color-bg: #fafafa;
  --color-text: #1a1a1a;
  --color-muted: #666;
  --color-border: #e0e0e0;
  --color-card-bg: #fff;
  --color-accent: #1a1a1a;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1080px;
}

html {
  font-size: 16px;
}

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

/* Nav */

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 2rem;
}

.logo {
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}

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

/* Main */

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

/* Hero */

.hero {
  padding: 6rem 0 4rem;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 640px;
}

.hero p {
  margin-top: 1.25rem;
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 480px;
}

/* Product cards */

.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-bottom: 6rem;
}

.card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem 2rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.card:hover {
  border-color: #bbb;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.card-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-muted);
}

.card span {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Nav active state */

.nav-links a.active {
  color: var(--color-text);
}

/* Subpage hero */

.subpage-hero {
  padding: 6rem 0 4rem;
}

.subpage-icon {
  width: 20px;
  height: 20px;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.subpage-hero h1 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.subpage-hero p {
  margin-top: 1rem;
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 520px;
}

.subpage-hero .tagline {
  margin-top: 1.25rem;
}

/* Features */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-bottom: 6rem;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature p {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* CTA */

.cta {
  padding-bottom: 4rem;
}

.cta p {
  font-size: 1rem;
  color: var(--color-muted);
}

.cta a {
  color: var(--color-text);
}

/* Footer */

footer {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
  border-top: 1px solid var(--color-border);
}

footer p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Responsive */

@media (max-width: 768px) {
  .hero {
    padding: 4rem 0 3rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .products {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 1.25rem;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .subpage-hero h1 {
    font-size: 1.8rem;
  }
}