:root {
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --text: #14171f;
  --text-muted: #5b6271;
  --accent: #1f6feb;
  --accent-hover: #1858c4;
  --border: #e4e7ec;
  --radius: 12px;
  --max-width: 1040px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

a:hover {
  text-decoration: underline;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

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

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

/* Hero */
.hero {
  padding: 96px 0 72px;
  background: linear-gradient(180deg, #fbfcfe 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
  font-weight: 700;
  max-width: 720px;
}

.hero .lede {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 32px;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: var(--text);
}

/* Sections */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--text-muted);
  margin: 0 0 32px;
}

/* Product card */
.product-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(20, 23, 31, 0.04);
}

.badge {
  display: inline-block;
  background: #e7f3ec;
  color: #1a7f3c;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.product-card h3 {
  font-size: 1.6rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 16px;
}

.feature-list {
  margin: 16px 0 24px;
  padding-left: 20px;
  color: var(--text);
}

.feature-list li {
  margin-bottom: 6px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .hero {
    padding: 64px 0 48px;
  }
  .section {
    padding: 56px 0;
  }
  .product-card {
    padding: 24px;
  }
  .nav-links {
    gap: 16px;
  }
}