:root {
  --ink: #111;
  --ink-soft: #444;
  --muted: #6b6b6b;
  --line: #e5e5e5;
  --bg: #fff;
  --bg-alt: #fafafa;
  --max: 1080px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
               Arial, "Noto Sans", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
html { scroll-padding-top: 96px; }

a { color: var(--ink); }

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

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(8px);
  z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo img {
  height: 56px;
  width: auto;
  display: block;
}
.site-header nav {
  display: flex;
  gap: 28px;
}
.site-header nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 500;
}
.site-header nav a:hover { color: var(--ink); }

/* Hero */
.hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 24px;
  max-width: 820px;
}
.hero .lede {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 720px;
  margin: 0;
}

/* Sections */
section {
  padding: 80px 0;
  border-bottom: 1px solid var(--line);
}
section h2 {
  font-size: 28px;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin: 0 0 36px;
}
.section-lede {
  font-size: 17px;
  color: var(--ink-soft);
  margin: -24px 0 36px;
  max-width: 640px;
}

/* Card grids */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  border: 1px solid var(--line);
  padding: 28px;
  background: var(--bg-alt);
}
.card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
}
.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15.5px;
}

/* Product cards */
.product-card {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 32px;
  background: var(--bg);
  transition: border-color 0.15s, transform 0.15s;
}
.product-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
}
.product-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.product-card p {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 15.5px;
}
.product-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Contact */
.contact-info {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  max-width: 640px;
}
.contact-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.contact-info p { margin: 0; }
.contact-info a { text-decoration: none; }
.contact-info a:hover { text-decoration: underline; }

/* Footer */
.site-footer {
  padding: 32px 0;
  border-bottom: none;
}
.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 720px) {
  .hero { padding: 64px 0 48px; }
  .hero h1 { font-size: 32px; }
  .hero .lede { font-size: 17px; }
  section { padding: 56px 0; }
  section h2 { font-size: 24px; margin-bottom: 28px; }
  .grid, .grid-2, .contact-info { grid-template-columns: 1fr; }
  .site-header nav { gap: 18px; }
  .site-header nav a { font-size: 14px; }
  .logo img { height: 44px; }
}